Merge pull request #3418 from vrothberg/go-modules

update dependencies

337 files changed, 28992 insertions, 4486 deletions

diff --git a/vendor/github.com/Microsoft/hcsshim/appveyor.yml b/vendor/github.com/Microsoft/hcsshim/appveyor.yml
index 85b086a43..a8ec5a593 100644
--- a/vendor/github.com/Microsoft/hcsshim/appveyor.yml
+++ b/vendor/github.com/Microsoft/hcsshim/appveyor.yml
@@ -6,23 +6,24 @@ clone_folder: c:\gopath\src\github.com\Microsoft\hcsshim
 
 environment:
   GOPATH: c:\gopath
-  PATH: C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;%GOPATH%\bin;%PATH%
+  PATH: C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;%GOPATH%\bin;C:\gometalinter-2.0.12-windows-amd64;%PATH%
+
+stack: go 1.11
 
 build_script:
-  - go get -u github.com/alecthomas/gometalinter
-  - gometalinter.exe --install
+  - appveyor DownloadFile https://github.com/alecthomas/gometalinter/releases/download/v2.0.12/gometalinter-2.0.12-windows-amd64.zip
+  - 7z x gometalinter-2.0.12-windows-amd64.zip -y -oC:\ > NUL
   - gometalinter.exe --config .gometalinter.json ./...
-  - go get -v -d -t -tags "functional integration admin" ./...
   - go build ./cmd/wclayer
   - go build ./cmd/runhcs
-  - go test -c ./pkg/go-runhcs/ -tags integration
   - go build ./cmd/tar2ext4
   - go test -v ./... -tags admin
-  - go test -c ./functional/ -tags functional
+  - go test -c ./test/functional/ -tags functional
+  - go test -c ./test/runhcs/ -tags integration
 
 artifacts:
   - path: 'wclayer.exe'
   - path: 'runhcs.exe'
-  - path: 'go-runhcs.test.exe'
   - path: 'tar2ext4.exe'
-  - path: 'functional.test.exe'
\ No newline at end of file
+  - path: 'functional.test.exe'
+  - path: 'runhcs.test.exe'
\ No newline at end of file
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/guestrequest/types.go b/vendor/github.com/Microsoft/hcsshim/internal/guestrequest/types.go
index 9f926c6be..5d3d0dfef 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/guestrequest/types.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/guestrequest/types.go
@@ -1,6 +1,8 @@
 package guestrequest
 
-import "github.com/Microsoft/hcsshim/internal/schema2"
+import (
+	"github.com/Microsoft/hcsshim/internal/schema2"
+)
 
 // Arguably, many of these (at least CombinedLayers) should have been generated
 // by swagger.
@@ -47,6 +49,19 @@ type LCOWMappedVPMemDevice struct {
 	MountPath    string `json:"MountPath,omitempty"` // /tmp/pN
 }
 
+type LCOWNetworkAdapter struct {
+	NamespaceID     string `json:",omitempty"`
+	ID              string `json:",omitempty"`
+	MacAddress      string `json:",omitempty"`
+	IPAddress       string `json:",omitempty"`
+	PrefixLength    uint8  `json:",omitempty"`
+	GatewayAddress  string `json:",omitempty"`
+	DNSSuffix       string `json:",omitempty"`
+	DNSServerList   string `json:",omitempty"`
+	EnableLowMetric bool   `json:",omitempty"`
+	EncapOverhead   uint16 `json:",omitempty"`
+}
+
 type ResourceType string
 
 const (
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/callback.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/callback.go
index 5119c2555..f9a922a4b 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/callback.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/callback.go
@@ -16,11 +16,20 @@ var (
 	notificationWatcherCallback = syscall.NewCallback(notificationWatcher)
 
 	// Notifications for HCS_SYSTEM handles
-	hcsNotificationSystemExited          hcsNotification = 0x00000001
-	hcsNotificationSystemCreateCompleted hcsNotification = 0x00000002
-	hcsNotificationSystemStartCompleted  hcsNotification = 0x00000003
-	hcsNotificationSystemPauseCompleted  hcsNotification = 0x00000004
-	hcsNotificationSystemResumeCompleted hcsNotification = 0x00000005
+	hcsNotificationSystemExited                      hcsNotification = 0x00000001
+	hcsNotificationSystemCreateCompleted             hcsNotification = 0x00000002
+	hcsNotificationSystemStartCompleted              hcsNotification = 0x00000003
+	hcsNotificationSystemPauseCompleted              hcsNotification = 0x00000004
+	hcsNotificationSystemResumeCompleted             hcsNotification = 0x00000005
+	hcsNotificationSystemCrashReport                 hcsNotification = 0x00000006
+	hcsNotificationSystemSiloJobCreated              hcsNotification = 0x00000007
+	hcsNotificationSystemSaveCompleted               hcsNotification = 0x00000008
+	hcsNotificationSystemRdpEnhancedModeStateChanged hcsNotification = 0x00000009
+	hcsNotificationSystemShutdownFailed              hcsNotification = 0x0000000A
+	hcsNotificationSystemGetPropertiesCompleted      hcsNotification = 0x0000000B
+	hcsNotificationSystemModifyCompleted             hcsNotification = 0x0000000C
+	hcsNotificationSystemCrashInitiated              hcsNotification = 0x0000000D
+	hcsNotificationSystemGuestConnectionClosed       hcsNotification = 0x0000000E
 
 	// Notifications for HCS_PROCESS handles
 	hcsNotificationProcessExited hcsNotification = 0x00010000
@@ -50,16 +59,23 @@ func newChannels() notificationChannels {
 	channels[hcsNotificationSystemResumeCompleted] = make(notificationChannel, 1)
 	channels[hcsNotificationProcessExited] = make(notificationChannel, 1)
 	channels[hcsNotificationServiceDisconnect] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemCrashReport] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemSiloJobCreated] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemSaveCompleted] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemRdpEnhancedModeStateChanged] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemShutdownFailed] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemGetPropertiesCompleted] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemModifyCompleted] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemCrashInitiated] = make(notificationChannel, 1)
+	channels[hcsNotificationSystemGuestConnectionClosed] = make(notificationChannel, 1)
+
 	return channels
 }
+
 func closeChannels(channels notificationChannels) {
-	close(channels[hcsNotificationSystemExited])
-	close(channels[hcsNotificationSystemCreateCompleted])
-	close(channels[hcsNotificationSystemStartCompleted])
-	close(channels[hcsNotificationSystemPauseCompleted])
-	close(channels[hcsNotificationSystemResumeCompleted])
-	close(channels[hcsNotificationProcessExited])
-	close(channels[hcsNotificationServiceDisconnect])
+	for _, c := range channels {
+		close(c)
+	}
 }
 
 func notificationWatcher(notificationType hcsNotification, callbackNumber uintptr, notificationStatus uintptr, notificationData *uint16) uintptr {
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/errors.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/errors.go
index 6368b5717..079b56535 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/errors.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/errors.go
@@ -73,6 +73,9 @@ var (
 	// ErrVmcomputeUnknownMessage is an error encountered guest compute system doesn't support the message
 	ErrVmcomputeUnknownMessage = syscall.Errno(0xc037010b)
 
+	// ErrVmcomputeUnexpectedExit is an error encountered when the compute system terminates unexpectedly
+	ErrVmcomputeUnexpectedExit = syscall.Errno(0xC0370106)
+
 	// ErrNotSupported is an error encountered when hcs doesn't support the request
 	ErrPlatformNotSupported = errors.New("unsupported platform request")
 )
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/log.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/log.go
index 90d164e35..6d03b17a2 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/log.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/log.go
@@ -7,9 +7,14 @@ func logOperationBegin(ctx logrus.Fields, msg string) {
 }
 
 func logOperationEnd(ctx logrus.Fields, msg string, err error) {
+	// Copy the log and fields first.
+	log := logrus.WithFields(ctx)
 	if err == nil {
-		logrus.WithFields(ctx).Debug(msg)
+		log.Debug(msg)
 	} else {
-		logrus.WithFields(ctx).WithError(err).Error(msg)
+		// Edit only the copied field data to avoid race conditions on the
+		// write.
+		log.Data[logrus.ErrorKey] = err
+		log.Error(msg)
 	}
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/process.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/process.go
index 42598cf2f..41e20bbf9 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/process.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/process.go
@@ -31,9 +31,8 @@ func newProcess(process hcsProcess, processID int, computeSystem *System) *Proce
 		processID: processID,
 		system:    computeSystem,
 		logctx: logrus.Fields{
-			logfields.HCSOperation: "",
-			logfields.ContainerID:  computeSystem.ID(),
-			logfields.ProcessID:    processID,
+			logfields.ContainerID: computeSystem.ID(),
+			logfields.ProcessID:   processID,
 		},
 	}
 }
@@ -88,13 +87,12 @@ func (process *Process) SystemID() string {
 }
 
 func (process *Process) logOperationBegin(operation string) {
-	process.logctx[logfields.HCSOperation] = operation
 	logOperationBegin(
 		process.logctx,
-		"hcsshim::Process - Begin Operation")
+		operation+" - Begin Operation")
 }
 
-func (process *Process) logOperationEnd(err error) {
+func (process *Process) logOperationEnd(operation string, err error) {
 	var result string
 	if err == nil {
 		result = "Success"
@@ -104,9 +102,8 @@ func (process *Process) logOperationEnd(err error) {
 
 	logOperationEnd(
 		process.logctx,
-		"hcsshim::Process - End Operation - "+result,
+		operation+" - End Operation - "+result,
 		err)
-	process.logctx[logfields.HCSOperation] = ""
 }
 
 // Signal signals the process with `options`.
@@ -116,7 +113,7 @@ func (process *Process) Signal(options guestrequest.SignalProcessOptions) (err e
 
 	operation := "hcsshim::Process::Signal"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -130,10 +127,9 @@ func (process *Process) Signal(options guestrequest.SignalProcessOptions) (err e
 	optionsStr := string(optionsb)
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(process.logctx, &completed)
-	err = hcsSignalProcess(process.handle, optionsStr, &resultp)
-	completed = true
+	syscallWatcher(process.logctx, func() {
+		err = hcsSignalProcess(process.handle, optionsStr, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return makeProcessError(process, operation, err, events)
@@ -149,17 +145,16 @@ func (process *Process) Kill() (err error) {
 
 	operation := "hcsshim::Process::Kill"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(process.logctx, &completed)
-	err = hcsTerminateProcess(process.handle, &resultp)
-	completed = true
+	syscallWatcher(process.logctx, func() {
+		err = hcsTerminateProcess(process.handle, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return makeProcessError(process, operation, err, events)
@@ -172,7 +167,7 @@ func (process *Process) Kill() (err error) {
 func (process *Process) Wait() (err error) {
 	operation := "hcsshim::Process::Wait"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	err = waitForNotification(process.callbackNumber, hcsNotificationProcessExited, nil)
 	if err != nil {
@@ -187,7 +182,7 @@ func (process *Process) Wait() (err error) {
 func (process *Process) WaitTimeout(timeout time.Duration) (err error) {
 	operation := "hcssshim::Process::WaitTimeout"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	err = waitForNotification(process.callbackNumber, hcsNotificationProcessExited, &timeout)
 	if err != nil {
@@ -204,7 +199,7 @@ func (process *Process) ResizeConsole(width, height uint16) (err error) {
 
 	operation := "hcsshim::Process::ResizeConsole"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -241,7 +236,7 @@ func (process *Process) Properties() (_ *ProcessStatus, err error) {
 
 	operation := "hcsshim::Process::Properties"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return nil, makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -251,10 +246,9 @@ func (process *Process) Properties() (_ *ProcessStatus, err error) {
 		resultp     *uint16
 		propertiesp *uint16
 	)
-	completed := false
-	go syscallWatcher(process.logctx, &completed)
-	err = hcsGetProcessProperties(process.handle, &propertiesp, &resultp)
-	completed = true
+	syscallWatcher(process.logctx, func() {
+		err = hcsGetProcessProperties(process.handle, &propertiesp, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return nil, makeProcessError(process, operation, err, events)
@@ -278,7 +272,7 @@ func (process *Process) Properties() (_ *ProcessStatus, err error) {
 func (process *Process) ExitCode() (_ int, err error) {
 	operation := "hcsshim::Process::ExitCode"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	properties, err := process.Properties()
 	if err != nil {
@@ -305,7 +299,7 @@ func (process *Process) Stdio() (_ io.WriteCloser, _ io.ReadCloser, _ io.ReadClo
 
 	operation := "hcsshim::Process::Stdio"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return nil, nil, nil, makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -349,7 +343,7 @@ func (process *Process) CloseStdin() (err error) {
 
 	operation := "hcsshim::Process::CloseStdin"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -387,7 +381,7 @@ func (process *Process) Close() (err error) {
 
 	operation := "hcsshim::Process::Close"
 	process.logOperationBegin(operation)
-	defer process.logOperationEnd(err)
+	defer func() { process.logOperationEnd(operation, err) }()
 
 	// Don't double free this
 	if process.handle == 0 {
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go
index 2629380fd..20b242524 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/system.go
@@ -49,20 +49,18 @@ func newSystem(id string) *System {
 	return &System{
 		id: id,
 		logctx: logrus.Fields{
-			logfields.HCSOperation: "",
-			logfields.ContainerID:  id,
+			logfields.ContainerID: id,
 		},
 	}
 }
 
 func (computeSystem *System) logOperationBegin(operation string) {
-	computeSystem.logctx[logfields.HCSOperation] = operation
 	logOperationBegin(
 		computeSystem.logctx,
-		"hcsshim::ComputeSystem - Begin Operation")
+		operation+" - Begin Operation")
 }
 
-func (computeSystem *System) logOperationEnd(err error) {
+func (computeSystem *System) logOperationEnd(operation string, err error) {
 	var result string
 	if err == nil {
 		result = "Success"
@@ -72,9 +70,8 @@ func (computeSystem *System) logOperationEnd(err error) {
 
 	logOperationEnd(
 		computeSystem.logctx,
-		"hcsshim::ComputeSystem - End Operation - "+result,
+		operation+" - End Operation - "+result,
 		err)
-	computeSystem.logctx[logfields.HCSOperation] = ""
 }
 
 // CreateComputeSystem creates a new compute system with the given configuration but does not start it.
@@ -83,7 +80,7 @@ func CreateComputeSystem(id string, hcsDocumentInterface interface{}) (_ *System
 
 	computeSystem := newSystem(id)
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	hcsDocumentB, err := json.Marshal(hcsDocumentInterface)
 	if err != nil {
@@ -97,13 +94,13 @@ func CreateComputeSystem(id string, hcsDocumentInterface interface{}) (_ *System
 		Debug("HCS ComputeSystem Document")
 
 	var (
-		resultp  *uint16
-		identity syscall.Handle
+		resultp     *uint16
+		identity    syscall.Handle
+		createError error
 	)
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	createError := hcsCreateComputeSystem(id, hcsDocument, identity, &computeSystem.handle, &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		createError = hcsCreateComputeSystem(id, hcsDocument, identity, &computeSystem.handle, &resultp)
+	})
 
 	if createError == nil || IsPending(createError) {
 		if err = computeSystem.registerCallback(); err != nil {
@@ -133,7 +130,13 @@ func OpenComputeSystem(id string) (_ *System, err error) {
 
 	computeSystem := newSystem(id)
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() {
+		if IsNotExist(err) {
+			computeSystem.logOperationEnd(operation, nil)
+		} else {
+			computeSystem.logOperationEnd(operation, err)
+		}
+	}()
 
 	var (
 		handle  hcsSystem
@@ -157,12 +160,10 @@ func OpenComputeSystem(id string) (_ *System, err error) {
 // GetComputeSystems gets a list of the compute systems on the system that match the query
 func GetComputeSystems(q schema1.ComputeSystemQuery) (_ []schema1.ContainerProperties, err error) {
 	operation := "hcsshim::GetComputeSystems"
-	fields := logrus.Fields{
-		logfields.HCSOperation: operation,
-	}
+	fields := logrus.Fields{}
 	logOperationBegin(
 		fields,
-		"hcsshim::ComputeSystem - Begin Operation")
+		operation+" - Begin Operation")
 
 	defer func() {
 		var result string
@@ -174,7 +175,7 @@ func GetComputeSystems(q schema1.ComputeSystemQuery) (_ []schema1.ContainerPrope
 
 		logOperationEnd(
 			fields,
-			"hcsshim::ComputeSystem - End Operation - "+result,
+			operation+" - End Operation - "+result,
 			err)
 	}()
 
@@ -193,10 +194,10 @@ func GetComputeSystems(q schema1.ComputeSystemQuery) (_ []schema1.ContainerPrope
 		resultp         *uint16
 		computeSystemsp *uint16
 	)
-	completed := false
-	go syscallWatcher(fields, &completed)
-	err = hcsEnumerateComputeSystems(query, &computeSystemsp, &resultp)
-	completed = true
+
+	syscallWatcher(fields, func() {
+		err = hcsEnumerateComputeSystems(query, &computeSystemsp, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return nil, &HcsError{Op: operation, Err: err, Events: events}
@@ -221,7 +222,7 @@ func (computeSystem *System) Start() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Start"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Start", "", ErrAlreadyClosed, nil)
@@ -254,10 +255,9 @@ func (computeSystem *System) Start() (err error) {
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsStartComputeSystem(computeSystem.handle, "", &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsStartComputeSystem(computeSystem.handle, "", &resultp)
+	})
 	events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemStartCompleted, &timeout.SystemStart)
 	if err != nil {
 		return makeSystemError(computeSystem, "Start", "", err, events)
@@ -279,17 +279,22 @@ func (computeSystem *System) Shutdown() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Shutdown"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() {
+		if IsAlreadyStopped(err) {
+			computeSystem.logOperationEnd(operation, nil)
+		} else {
+			computeSystem.logOperationEnd(operation, err)
+		}
+	}()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Shutdown", "", ErrAlreadyClosed, nil)
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsShutdownComputeSystem(computeSystem.handle, "", &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsShutdownComputeSystem(computeSystem.handle, "", &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return makeSystemError(computeSystem, "Shutdown", "", err, events)
@@ -306,19 +311,24 @@ func (computeSystem *System) Terminate() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Terminate"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() {
+		if IsPending(err) {
+			computeSystem.logOperationEnd(operation, nil)
+		} else {
+			computeSystem.logOperationEnd(operation, err)
+		}
+	}()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Terminate", "", ErrAlreadyClosed, nil)
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsTerminateComputeSystem(computeSystem.handle, "", &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsTerminateComputeSystem(computeSystem.handle, "", &resultp)
+	})
 	events := processHcsResult(resultp)
-	if err != nil {
+	if err != nil && err != ErrVmcomputeAlreadyStopped {
 		return makeSystemError(computeSystem, "Terminate", "", err, events)
 	}
 
@@ -329,7 +339,7 @@ func (computeSystem *System) Terminate() (err error) {
 func (computeSystem *System) Wait() (err error) {
 	operation := "hcsshim::ComputeSystem::Wait"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, nil)
 	if err != nil {
@@ -339,12 +349,27 @@ func (computeSystem *System) Wait() (err error) {
 	return nil
 }
 
+// WaitExpectedError synchronously waits for the compute system to shutdown or
+// terminate, and ignores the passed error if it occurs.
+func (computeSystem *System) WaitExpectedError(expected error) (err error) {
+	operation := "hcsshim::ComputeSystem::WaitExpectedError"
+	computeSystem.logOperationBegin(operation)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
+
+	err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, nil)
+	if err != nil && getInnerError(err) != expected {
+		return makeSystemError(computeSystem, "WaitExpectedError", "", err, nil)
+	}
+
+	return nil
+}
+
 // WaitTimeout synchronously waits for the compute system to terminate or the duration to elapse.
 // If the timeout expires, IsTimeout(err) == true
 func (computeSystem *System) WaitTimeout(timeout time.Duration) (err error) {
 	operation := "hcsshim::ComputeSystem::WaitTimeout"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	err = waitForNotification(computeSystem.callbackNumber, hcsNotificationSystemExited, &timeout)
 	if err != nil {
@@ -360,7 +385,7 @@ func (computeSystem *System) Properties(types ...schema1.PropertyType) (_ *schem
 
 	operation := "hcsshim::ComputeSystem::Properties"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	queryj, err := json.Marshal(schema1.PropertyQuery{types})
 	if err != nil {
@@ -372,10 +397,9 @@ func (computeSystem *System) Properties(types ...schema1.PropertyType) (_ *schem
 		Debug("HCS ComputeSystem Properties Query")
 
 	var resultp, propertiesp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsGetComputeSystemProperties(computeSystem.handle, string(queryj), &propertiesp, &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsGetComputeSystemProperties(computeSystem.handle, string(queryj), &propertiesp, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return nil, makeSystemError(computeSystem, "Properties", "", err, events)
@@ -400,17 +424,16 @@ func (computeSystem *System) Pause() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Pause"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Pause", "", ErrAlreadyClosed, nil)
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsPauseComputeSystem(computeSystem.handle, "", &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsPauseComputeSystem(computeSystem.handle, "", &resultp)
+	})
 	events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemPauseCompleted, &timeout.SystemPause)
 	if err != nil {
 		return makeSystemError(computeSystem, "Pause", "", err, events)
@@ -426,17 +449,16 @@ func (computeSystem *System) Resume() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Resume"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Resume", "", ErrAlreadyClosed, nil)
 	}
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsResumeComputeSystem(computeSystem.handle, "", &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsResumeComputeSystem(computeSystem.handle, "", &resultp)
+	})
 	events, err := processAsyncHcsResult(err, resultp, computeSystem.callbackNumber, hcsNotificationSystemResumeCompleted, &timeout.SystemResume)
 	if err != nil {
 		return makeSystemError(computeSystem, "Resume", "", err, events)
@@ -452,7 +474,7 @@ func (computeSystem *System) CreateProcess(c interface{}) (_ *Process, err error
 
 	operation := "hcsshim::ComputeSystem::CreateProcess"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	var (
 		processInfo   hcsProcessInformation
@@ -475,10 +497,9 @@ func (computeSystem *System) CreateProcess(c interface{}) (_ *Process, err error
 		WithField(logfields.JSON, configuration).
 		Debug("HCS ComputeSystem Process Document")
 
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsCreateProcess(computeSystem.handle, configuration, &processInfo, &processHandle, &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsCreateProcess(computeSystem.handle, configuration, &processInfo, &processHandle, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return nil, makeSystemError(computeSystem, "CreateProcess", configuration, err, events)
@@ -513,7 +534,7 @@ func (computeSystem *System) OpenProcess(pid int) (_ *Process, err error) {
 
 	operation := "hcsshim::ComputeSystem::OpenProcess"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	var (
 		processHandle hcsProcess
@@ -524,10 +545,9 @@ func (computeSystem *System) OpenProcess(pid int) (_ *Process, err error) {
 		return nil, makeSystemError(computeSystem, "OpenProcess", "", ErrAlreadyClosed, nil)
 	}
 
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsOpenProcess(computeSystem.handle, uint32(pid), &processHandle, &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsOpenProcess(computeSystem.handle, uint32(pid), &processHandle, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return nil, makeSystemError(computeSystem, "OpenProcess", "", err, events)
@@ -548,7 +568,7 @@ func (computeSystem *System) Close() (err error) {
 
 	operation := "hcsshim::ComputeSystem::Close"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	// Don't double free this
 	if computeSystem.handle == 0 {
@@ -559,10 +579,9 @@ func (computeSystem *System) Close() (err error) {
 		return makeSystemError(computeSystem, "Close", "", err, nil)
 	}
 
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsCloseComputeSystem(computeSystem.handle)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsCloseComputeSystem(computeSystem.handle)
+	})
 	if err != nil {
 		return makeSystemError(computeSystem, "Close", "", err, nil)
 	}
@@ -636,7 +655,7 @@ func (computeSystem *System) Modify(config interface{}) (err error) {
 
 	operation := "hcsshim::ComputeSystem::Modify"
 	computeSystem.logOperationBegin(operation)
-	defer computeSystem.logOperationEnd(err)
+	defer func() { computeSystem.logOperationEnd(operation, err) }()
 
 	if computeSystem.handle == 0 {
 		return makeSystemError(computeSystem, "Modify", "", ErrAlreadyClosed, nil)
@@ -654,10 +673,9 @@ func (computeSystem *System) Modify(config interface{}) (err error) {
 		Debug("HCS ComputeSystem Modify Document")
 
 	var resultp *uint16
-	completed := false
-	go syscallWatcher(computeSystem.logctx, &completed)
-	err = hcsModifyComputeSystem(computeSystem.handle, requestString, &resultp)
-	completed = true
+	syscallWatcher(computeSystem.logctx, func() {
+		err = hcsModifyComputeSystem(computeSystem.handle, requestString, &resultp)
+	})
 	events := processHcsResult(resultp)
 	if err != nil {
 		return makeSystemError(computeSystem, "Modify", requestString, err, events)
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go
index e09dd1334..f85ed3187 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go
@@ -1,7 +1,7 @@
 package hcs
 
 import (
-	"time"
+	"context"
 
 	"github.com/Microsoft/hcsshim/internal/logfields"
 	"github.com/Microsoft/hcsshim/internal/timeout"
@@ -17,17 +17,25 @@ import (
 //
 // Usage is:
 //
-// completed := false
-// go syscallWatcher(context, &completed)
-// <syscall>
-// completed = true
+// syscallWatcher(logContext, func() {
+//    err = <syscall>(args...)
+// })
 //
-func syscallWatcher(context logrus.Fields, syscallCompleted *bool) {
-	time.Sleep(timeout.SyscallWatcher)
-	if *syscallCompleted {
-		return
+
+func syscallWatcher(logContext logrus.Fields, syscallLambda func()) {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout.SyscallWatcher)
+	defer cancel()
+	go watchFunc(ctx, logContext)
+	syscallLambda()
+}
+
+func watchFunc(ctx context.Context, logContext logrus.Fields) {
+	select {
+	case <-ctx.Done():
+		if ctx.Err() != context.Canceled {
+			logrus.WithFields(logContext).
+				WithField(logfields.Timeout, timeout.SyscallWatcher).
+				Warning("Syscall did not complete within operation timeout. This may indicate a platform issue. If it appears to be making no forward progress, obtain the stacks and see if there is a syscall stuck in the platform API for a significant length of time.")
+		}
 	}
-	logrus.WithFields(context).
-		WithField(logfields.Timeout, timeout.SyscallWatcher).
-		Warning("Syscall did not complete within operation timeout. This may indicate a platform issue. If it appears to be making no forward progress, obtain the stacks and see if there is a syscall stuck in the platform API for a significant length of time.")
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/zsyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/zsyscall_windows.go
index 877c69a14..fcd5cdc87 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/zsyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcs/zsyscall_windows.go
@@ -6,7 +6,6 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/Microsoft/hcsshim/internal/interop"
 	"golang.org/x/sys/windows"
 )
 
@@ -81,7 +80,10 @@ func _hcsEnumerateComputeSystems(query *uint16, computeSystems **uint16, result
 	}
 	r0, _, _ := syscall.Syscall(procHcsEnumerateComputeSystems.Addr(), 3, uintptr(unsafe.Pointer(query)), uintptr(unsafe.Pointer(computeSystems)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -106,7 +108,10 @@ func _hcsCreateComputeSystem(id *uint16, configuration *uint16, identity syscall
 	}
 	r0, _, _ := syscall.Syscall6(procHcsCreateComputeSystem.Addr(), 5, uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(configuration)), uintptr(identity), uintptr(unsafe.Pointer(computeSystem)), uintptr(unsafe.Pointer(result)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -126,7 +131,10 @@ func _hcsOpenComputeSystem(id *uint16, computeSystem *hcsSystem, result **uint16
 	}
 	r0, _, _ := syscall.Syscall(procHcsOpenComputeSystem.Addr(), 3, uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(computeSystem)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -137,7 +145,10 @@ func hcsCloseComputeSystem(computeSystem hcsSystem) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procHcsCloseComputeSystem.Addr(), 1, uintptr(computeSystem), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -157,7 +168,10 @@ func _hcsStartComputeSystem(computeSystem hcsSystem, options *uint16, result **u
 	}
 	r0, _, _ := syscall.Syscall(procHcsStartComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -177,7 +191,10 @@ func _hcsShutdownComputeSystem(computeSystem hcsSystem, options *uint16, result
 	}
 	r0, _, _ := syscall.Syscall(procHcsShutdownComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -197,7 +214,10 @@ func _hcsTerminateComputeSystem(computeSystem hcsSystem, options *uint16, result
 	}
 	r0, _, _ := syscall.Syscall(procHcsTerminateComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -217,7 +237,10 @@ func _hcsPauseComputeSystem(computeSystem hcsSystem, options *uint16, result **u
 	}
 	r0, _, _ := syscall.Syscall(procHcsPauseComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -237,7 +260,10 @@ func _hcsResumeComputeSystem(computeSystem hcsSystem, options *uint16, result **
 	}
 	r0, _, _ := syscall.Syscall(procHcsResumeComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -257,7 +283,10 @@ func _hcsGetComputeSystemProperties(computeSystem hcsSystem, propertyQuery *uint
 	}
 	r0, _, _ := syscall.Syscall6(procHcsGetComputeSystemProperties.Addr(), 4, uintptr(computeSystem), uintptr(unsafe.Pointer(propertyQuery)), uintptr(unsafe.Pointer(properties)), uintptr(unsafe.Pointer(result)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -277,7 +306,10 @@ func _hcsModifyComputeSystem(computeSystem hcsSystem, configuration *uint16, res
 	}
 	r0, _, _ := syscall.Syscall(procHcsModifyComputeSystem.Addr(), 3, uintptr(computeSystem), uintptr(unsafe.Pointer(configuration)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -288,7 +320,10 @@ func hcsRegisterComputeSystemCallback(computeSystem hcsSystem, callback uintptr,
 	}
 	r0, _, _ := syscall.Syscall6(procHcsRegisterComputeSystemCallback.Addr(), 4, uintptr(computeSystem), uintptr(callback), uintptr(context), uintptr(unsafe.Pointer(callbackHandle)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -299,7 +334,10 @@ func hcsUnregisterComputeSystemCallback(callbackHandle hcsCallback) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procHcsUnregisterComputeSystemCallback.Addr(), 1, uintptr(callbackHandle), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -319,7 +357,10 @@ func _hcsCreateProcess(computeSystem hcsSystem, processParameters *uint16, proce
 	}
 	r0, _, _ := syscall.Syscall6(procHcsCreateProcess.Addr(), 5, uintptr(computeSystem), uintptr(unsafe.Pointer(processParameters)), uintptr(unsafe.Pointer(processInformation)), uintptr(unsafe.Pointer(process)), uintptr(unsafe.Pointer(result)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -330,7 +371,10 @@ func hcsOpenProcess(computeSystem hcsSystem, pid uint32, process *hcsProcess, re
 	}
 	r0, _, _ := syscall.Syscall6(procHcsOpenProcess.Addr(), 4, uintptr(computeSystem), uintptr(pid), uintptr(unsafe.Pointer(process)), uintptr(unsafe.Pointer(result)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -341,7 +385,10 @@ func hcsCloseProcess(process hcsProcess) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procHcsCloseProcess.Addr(), 1, uintptr(process), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -352,7 +399,10 @@ func hcsTerminateProcess(process hcsProcess, result **uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procHcsTerminateProcess.Addr(), 2, uintptr(process), uintptr(unsafe.Pointer(result)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -372,7 +422,10 @@ func _hcsSignalProcess(process hcsProcess, options *uint16, result **uint16) (hr
 	}
 	r0, _, _ := syscall.Syscall(procHcsTerminateProcess.Addr(), 3, uintptr(process), uintptr(unsafe.Pointer(options)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -383,7 +436,10 @@ func hcsGetProcessInfo(process hcsProcess, processInformation *hcsProcessInforma
 	}
 	r0, _, _ := syscall.Syscall(procHcsGetProcessInfo.Addr(), 3, uintptr(process), uintptr(unsafe.Pointer(processInformation)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -394,7 +450,10 @@ func hcsGetProcessProperties(process hcsProcess, processProperties **uint16, res
 	}
 	r0, _, _ := syscall.Syscall(procHcsGetProcessProperties.Addr(), 3, uintptr(process), uintptr(unsafe.Pointer(processProperties)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -414,7 +473,10 @@ func _hcsModifyProcess(process hcsProcess, settings *uint16, result **uint16) (h
 	}
 	r0, _, _ := syscall.Syscall(procHcsModifyProcess.Addr(), 3, uintptr(process), uintptr(unsafe.Pointer(settings)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -434,7 +496,10 @@ func _hcsGetServiceProperties(propertyQuery *uint16, properties **uint16, result
 	}
 	r0, _, _ := syscall.Syscall(procHcsGetServiceProperties.Addr(), 3, uintptr(unsafe.Pointer(propertyQuery)), uintptr(unsafe.Pointer(properties)), uintptr(unsafe.Pointer(result)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -445,7 +510,10 @@ func hcsRegisterProcessCallback(process hcsProcess, callback uintptr, context ui
 	}
 	r0, _, _ := syscall.Syscall6(procHcsRegisterProcessCallback.Addr(), 4, uintptr(process), uintptr(callback), uintptr(context), uintptr(unsafe.Pointer(callbackHandle)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -456,7 +524,10 @@ func hcsUnregisterProcessCallback(callbackHandle hcsCallback) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procHcsUnregisterProcessCallback.Addr(), 1, uintptr(callbackHandle), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcserror/hcserror.go b/vendor/github.com/Microsoft/hcsshim/internal/hcserror/hcserror.go
index c8d362c66..921c2c855 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hcserror/hcserror.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hcserror/hcserror.go
@@ -36,10 +36,6 @@ func New(err error, title, rest string) error {
 	return &HcsError{title, rest, err}
 }
 
-func Errorf(err error, title, format string, a ...interface{}) error {
-	return New(err, title, fmt.Sprintf(format, a...))
-}
-
 func Win32FromError(err error) uint32 {
 	if herr, ok := err.(*HcsError); ok {
 		return Win32FromError(herr.Err)
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hns/hnsendpoint.go b/vendor/github.com/Microsoft/hcsshim/internal/hns/hnsendpoint.go
index ce636458c..59ec7004c 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hns/hnsendpoint.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hns/hnsendpoint.go
@@ -23,7 +23,9 @@ type HNSEndpoint struct {
 	DisableICC         bool              `json:",omitempty"`
 	PrefixLength       uint8             `json:",omitempty"`
 	IsRemoteEndpoint   bool              `json:",omitempty"`
+	EnableLowMetric    bool              `json:",omitempty"`
 	Namespace          *Namespace        `json:",omitempty"`
+	EncapOverhead      uint16            `json:",omitempty"`
 }
 
 //SystemType represents the type of the system on which actions are done
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hns/zsyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/internal/hns/zsyscall_windows.go
index 3a3232a06..204633a48 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/hns/zsyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/hns/zsyscall_windows.go
@@ -6,7 +6,6 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/Microsoft/hcsshim/internal/interop"
 	"golang.org/x/sys/windows"
 )
 
@@ -68,7 +67,10 @@ func __hnsCall(method *uint16, path *uint16, object *uint16, response **uint16)
 	}
 	r0, _, _ := syscall.Syscall6(procHNSCall.Addr(), 4, uintptr(unsafe.Pointer(method)), uintptr(unsafe.Pointer(path)), uintptr(unsafe.Pointer(object)), uintptr(unsafe.Pointer(response)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/interop/interop.go b/vendor/github.com/Microsoft/hcsshim/internal/interop/interop.go
index f10c88d08..2f6ec029e 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/interop/interop.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/interop/interop.go
@@ -5,9 +5,9 @@ import (
 	"unsafe"
 )
 
-//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go interop.go
+//go:generate go run ../../mksyscall_windows.go -output zsyscall_windows.go interop.go
 
-//sys coTaskMemFree(buffer unsafe.Pointer) = ole32.CoTaskMemFree
+//sys coTaskMemFree(buffer unsafe.Pointer) = api_ms_win_core_com_l1_1_0.CoTaskMemFree
 
 func ConvertAndFreeCoTaskMemString(buffer *uint16) string {
 	str := syscall.UTF16ToString((*[1 << 29]uint16)(unsafe.Pointer(buffer))[:])
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/interop/zsyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/internal/interop/zsyscall_windows.go
index 2f5bf8f55..12b0c71c5 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/interop/zsyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/interop/zsyscall_windows.go
@@ -1,4 +1,4 @@
-// Code generated by 'go generate'; DO NOT EDIT.
+// Code generated mksyscall_windows.exe DO NOT EDIT
 
 package interop
 
@@ -37,9 +37,9 @@ func errnoErr(e syscall.Errno) error {
 }
 
 var (
-	modole32 = windows.NewLazySystemDLL("ole32.dll")
+	modapi_ms_win_core_com_l1_1_0 = windows.NewLazySystemDLL("api-ms-win-core-com-l1-1-0.dll")
 
-	procCoTaskMemFree = modole32.NewProc("CoTaskMemFree")
+	procCoTaskMemFree = modapi_ms_win_core_com_l1_1_0.NewProc("CoTaskMemFree")
 )
 
 func coTaskMemFree(buffer unsafe.Pointer) {
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/logfields/fields.go b/vendor/github.com/Microsoft/hcsshim/internal/logfields/fields.go
index a1527d706..cf2c166d9 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/logfields/fields.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/logfields/fields.go
@@ -26,11 +26,6 @@ const (
 	Uint32       = "uint32"
 	Uint64       = "uint64"
 
-	// HCS
-
-	HCSOperation       = "hcs-op"
-	HCSOperationResult = "hcs-op-result"
-
 	// runhcs
 
 	VMShimOperation = "vmshim-op"
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/safefile/safeopen.go b/vendor/github.com/Microsoft/hcsshim/internal/safefile/safeopen.go
index 0c0b1159f..f31edfaf8 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/safefile/safeopen.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/safefile/safeopen.go
@@ -87,7 +87,7 @@ func OpenRoot(path string) (*os.File, error) {
 
 func ntRelativePath(path string) ([]uint16, error) {
 	path = filepath.Clean(path)
-	if strings.Contains(":", path) {
+	if strings.Contains(path, ":") {
 		// Since alternate data streams must follow the file they
 		// are attached to, finding one here (out of order) is invalid.
 		return nil, errors.New("path contains invalid character `:`")
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/schema2/plan9_share.go b/vendor/github.com/Microsoft/hcsshim/internal/schema2/plan9_share.go
index b2bc58b83..eb171817a 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/schema2/plan9_share.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/schema2/plan9_share.go
@@ -20,6 +20,13 @@ type Plan9Share struct {
 
 	Port int32 `json:"Port,omitempty"`
 
+	// Flags are marked private. Until they are exported correctly
+	//
+	// ReadOnly      0x00000001
+	// LinuxMetadata 0x00000004
+	// CaseSensitive 0x00000008
+	Flags int32 `json:"Flags,omitempty"`
+
 	ReadOnly bool `json:"ReadOnly,omitempty"`
 
 	UseShareRootIdentity bool `json:"UseShareRootIdentity,omitempty"`
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/schema2/virtual_machine.go b/vendor/github.com/Microsoft/hcsshim/internal/schema2/virtual_machine.go
index 11f39eea7..2d22b1bcb 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/schema2/virtual_machine.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/schema2/virtual_machine.go
@@ -11,6 +11,9 @@ package hcsschema
 
 type VirtualMachine struct {
 
+	// StopOnReset is private in the schema. If regenerated need to put back.
+	StopOnReset bool `json:"StopOnReset,omitempty"`
+
 	Chipset *Chipset `json:"Chipset,omitempty"`
 
 	ComputeTopology *Topology `json:"ComputeTopology,omitempty"`
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/activatelayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/activatelayer.go
index 3a0d4bc58..dcb919268 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/activatelayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/activatelayer.go
@@ -9,17 +9,24 @@ import (
 // For a read/write layer, the mounted filesystem will appear as a volume on the
 // host, while a read-only layer is generally expected to be a no-op.
 // An activated layer must later be deactivated via DeactivateLayer.
-func ActivateLayer(path string) error {
-	title := "hcsshim::ActivateLayer "
-	logrus.Debugf(title+"path %s", path)
+func ActivateLayer(path string) (err error) {
+	title := "hcsshim::ActivateLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := activateLayer(&stdDriverInfo, path)
+	err = activateLayer(&stdDriverInfo, path)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+" - succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createlayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createlayer.go
index d15817730..be2bc3fd6 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createlayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createlayer.go
@@ -7,17 +7,25 @@ import (
 
 // CreateLayer creates a new, empty, read-only layer on the filesystem based on
 // the parent layer provided.
-func CreateLayer(path, parent string) error {
-	title := "hcsshim::CreateLayer "
-	logrus.Debugf(title+"ID %s parent %s", path, parent)
+func CreateLayer(path, parent string) (err error) {
+	title := "hcsshim::CreateLayer"
+	fields := logrus.Fields{
+		"parent": parent,
+		"path":   path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := createLayer(&stdDriverInfo, path, parent)
+	err = createLayer(&stdDriverInfo, path, parent)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s parent=%s", path, parent)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"- succeeded path=%s parent=%s", path, parent)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createscratchlayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createscratchlayer.go
index bf2fece19..7e3351289 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createscratchlayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/createscratchlayer.go
@@ -9,9 +9,20 @@ import (
 // This requires both the id of the direct parent layer, as well as the full list
 // of paths to all parent layers up to the base (and including the direct parent
 // whose id was provided).
-func CreateScratchLayer(path string, parentLayerPaths []string) error {
-	title := "hcsshim::CreateScratchLayer "
-	logrus.Debugf(title+"path %s", path)
+func CreateScratchLayer(path string, parentLayerPaths []string) (err error) {
+	title := "hcsshim::CreateScratchLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	// Generate layer descriptors
 	layers, err := layerPathsToDescriptors(parentLayerPaths)
@@ -21,11 +32,7 @@ func CreateScratchLayer(path string, parentLayerPaths []string) error {
 
 	err = createSandboxLayer(&stdDriverInfo, path, 0, layers)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"- succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/deactivatelayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/deactivatelayer.go
index b998f8a19..2dd5d5715 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/deactivatelayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/deactivatelayer.go
@@ -6,17 +6,24 @@ import (
 )
 
 // DeactivateLayer will dismount a layer that was mounted via ActivateLayer.
-func DeactivateLayer(path string) error {
-	title := "hcsshim::DeactivateLayer "
-	logrus.Debugf(title+"path %s", path)
+func DeactivateLayer(path string) (err error) {
+	title := "hcsshim::DeactivateLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := deactivateLayer(&stdDriverInfo, path)
+	err = deactivateLayer(&stdDriverInfo, path)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+"- failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/destroylayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/destroylayer.go
index dc14cecc4..4da690c20 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/destroylayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/destroylayer.go
@@ -7,17 +7,24 @@ import (
 
 // DestroyLayer will remove the on-disk files representing the layer with the given
 // path, including that layer's containing folder, if any.
-func DestroyLayer(path string) error {
-	title := "hcsshim::DestroyLayer "
-	logrus.Debugf(title+"path %s", path)
+func DestroyLayer(path string) (err error) {
+	title := "hcsshim::DestroyLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := destroyLayer(&stdDriverInfo, path)
+	err = destroyLayer(&stdDriverInfo, path)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/expandscratchsize.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/expandscratchsize.go
index 7832bb452..651676fb2 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/expandscratchsize.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/expandscratchsize.go
@@ -6,17 +6,25 @@ import (
 )
 
 // ExpandScratchSize expands the size of a layer to at least size bytes.
-func ExpandScratchSize(path string, size uint64) error {
-	title := "hcsshim::ExpandScratchSize "
-	logrus.Debugf(title+"path=%s size=%d", path, size)
+func ExpandScratchSize(path string, size uint64) (err error) {
+	title := "hcsshim::ExpandScratchSize"
+	fields := logrus.Fields{
+		"path": path,
+		"size": size,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := expandSandboxSize(&stdDriverInfo, path, size)
+	err = expandSandboxSize(&stdDriverInfo, path, size)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s size=%d", path, size)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"- succeeded path=%s size=%d", path, size)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/exportlayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/exportlayer.go
index d43e941ee..0425b3395 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/exportlayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/exportlayer.go
@@ -14,9 +14,21 @@ import (
 // format includes any metadata required for later importing the layer (using
 // ImportLayer), and requires the full list of parent layer paths in order to
 // perform the export.
-func ExportLayer(path string, exportFolderPath string, parentLayerPaths []string) error {
-	title := "hcsshim::ExportLayer "
-	logrus.Debugf(title+"path %s folder %s", path, exportFolderPath)
+func ExportLayer(path string, exportFolderPath string, parentLayerPaths []string) (err error) {
+	title := "hcsshim::ExportLayer"
+	fields := logrus.Fields{
+		"path":             path,
+		"exportFolderPath": exportFolderPath,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	// Generate layer descriptors
 	layers, err := layerPathsToDescriptors(parentLayerPaths)
@@ -26,12 +38,8 @@ func ExportLayer(path string, exportFolderPath string, parentLayerPaths []string
 
 	err = exportLayer(&stdDriverInfo, path, exportFolderPath, layers)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s folder=%s", path, exportFolderPath)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s folder=%s", path, exportFolderPath)
 	return nil
 }
 
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getlayermountpath.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getlayermountpath.go
index 8c37549a0..d60b6ed53 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getlayermountpath.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getlayermountpath.go
@@ -11,20 +11,29 @@ import (
 // the path at which that layer can be accessed.  This path may be a volume path
 // if the layer is a mounted read-write layer, otherwise it is expected to be the
 // folder path at which the layer is stored.
-func GetLayerMountPath(path string) (string, error) {
-	title := "hcsshim::GetLayerMountPath "
-	logrus.Debugf(title+"path %s", path)
+func GetLayerMountPath(path string) (_ string, err error) {
+	title := "hcsshim::GetLayerMountPath"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	var mountPathLength uintptr
 	mountPathLength = 0
 
 	// Call the procedure itself.
-	logrus.Debugf("Calling proc (1)")
-	err := getLayerMountPath(&stdDriverInfo, path, &mountPathLength, nil)
+	logrus.WithFields(fields).Debug("Calling proc (1)")
+	err = getLayerMountPath(&stdDriverInfo, path, &mountPathLength, nil)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "(first call) path=%s", path)
-		logrus.Error(err)
-		return "", err
+		return "", hcserror.New(err, title+" - failed", "(first call)")
 	}
 
 	// Allocate a mount path of the returned length.
@@ -35,15 +44,13 @@ func GetLayerMountPath(path string) (string, error) {
 	mountPathp[0] = 0
 
 	// Call the procedure again
-	logrus.Debugf("Calling proc (2)")
+	logrus.WithFields(fields).Debug("Calling proc (2)")
 	err = getLayerMountPath(&stdDriverInfo, path, &mountPathLength, &mountPathp[0])
 	if err != nil {
-		err = hcserror.Errorf(err, title, "(second call) path=%s", path)
-		logrus.Error(err)
-		return "", err
+		return "", hcserror.New(err, title+" - failed", "(second call)")
 	}
 
 	mountPath := syscall.UTF16ToString(mountPathp[0:])
-	logrus.Debugf(title+"succeeded path=%s mountPath=%s", path, mountPath)
+	fields["mountPath"] = mountPath
 	return mountPath, nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getsharedbaseimages.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getsharedbaseimages.go
index 10899c68a..dbd83ef2b 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getsharedbaseimages.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/getsharedbaseimages.go
@@ -10,17 +10,20 @@ import (
 // image store and return descriptive info about those images for the purpose
 // of registering them with the graphdriver, graph, and tagstore.
 func GetSharedBaseImages() (imageData string, err error) {
-	title := "hcsshim::GetSharedBaseImages "
+	title := "hcsshim::GetSharedBaseImages"
+	logrus.Debug(title)
+	defer func() {
+		if err != nil {
+			logrus.WithError(err).Error(err)
+		} else {
+			logrus.WithField("imageData", imageData).Debug(title + " - succeeded")
+		}
+	}()
 
-	logrus.Debugf("Calling proc")
 	var buffer *uint16
 	err = getBaseImages(&buffer)
 	if err != nil {
-		err = hcserror.New(err, title, "")
-		logrus.Error(err)
-		return
+		return "", hcserror.New(err, title+" - failed", "")
 	}
-	imageData = interop.ConvertAndFreeCoTaskMemString(buffer)
-	logrus.Debugf(title+" - succeeded output=%s", imageData)
-	return
+	return interop.ConvertAndFreeCoTaskMemString(buffer), nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/grantvmaccess.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/grantvmaccess.go
index d86e67827..05735df6c 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/grantvmaccess.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/grantvmaccess.go
@@ -1,24 +1,30 @@
 package wclayer
 
 import (
-	"fmt"
-
 	"github.com/Microsoft/hcsshim/internal/hcserror"
 	"github.com/sirupsen/logrus"
 )
 
 // GrantVmAccess adds access to a file for a given VM
-func GrantVmAccess(vmid string, filepath string) error {
-	title := fmt.Sprintf("hcsshim::GrantVmAccess id:%s path:%s ", vmid, filepath)
-	logrus.Debugf(title)
+func GrantVmAccess(vmid string, filepath string) (err error) {
+	title := "hcsshim::GrantVmAccess"
+	fields := logrus.Fields{
+		"vm-id": vmid,
+		"path":  filepath,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := grantVmAccess(vmid, filepath)
+	err = grantVmAccess(vmid, filepath)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", filepath)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title + " - succeeded")
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/importlayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/importlayer.go
index 486d55470..76a804f2a 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/importlayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/importlayer.go
@@ -15,9 +15,21 @@ import (
 // that into a layer with the id layerId.  Note that in order to correctly populate
 // the layer and interperet the transport format, all parent layers must already
 // be present on the system at the paths provided in parentLayerPaths.
-func ImportLayer(path string, importFolderPath string, parentLayerPaths []string) error {
-	title := "hcsshim::ImportLayer "
-	logrus.Debugf(title+"path %s folder %s", path, importFolderPath)
+func ImportLayer(path string, importFolderPath string, parentLayerPaths []string) (err error) {
+	title := "hcsshim::ImportLayer"
+	fields := logrus.Fields{
+		"path":             path,
+		"importFolderPath": importFolderPath,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	// Generate layer descriptors
 	layers, err := layerPathsToDescriptors(parentLayerPaths)
@@ -27,12 +39,8 @@ func ImportLayer(path string, importFolderPath string, parentLayerPaths []string
 
 	err = importLayer(&stdDriverInfo, path, importFolderPath, layers)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s folder=%s", path, importFolderPath)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s folder=%s", path, importFolderPath)
 	return nil
 }
 
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerexists.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerexists.go
index 71287ff8a..258167a57 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerexists.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerexists.go
@@ -7,19 +7,27 @@ import (
 
 // LayerExists will return true if a layer with the given id exists and is known
 // to the system.
-func LayerExists(path string) (bool, error) {
-	title := "hcsshim::LayerExists "
-	logrus.Debugf(title+"path %s", path)
+func LayerExists(path string) (_ bool, err error) {
+	title := "hcsshim::LayerExists"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	// Call the procedure itself.
 	var exists uint32
-	err := layerExists(&stdDriverInfo, path, &exists)
+	err = layerExists(&stdDriverInfo, path, &exists)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return false, err
+		return false, hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s exists=%d", path, exists)
+	fields["layer-exists"] = exists != 0
 	return exists != 0, nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerutils.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerutils.go
index a1b8b9882..6d0ae8a07 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerutils.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerutils.go
@@ -75,13 +75,13 @@ func layerPathsToDescriptors(parentLayerPaths []string) ([]WC_LAYER_DESCRIPTOR,
 	for i := 0; i < len(parentLayerPaths); i++ {
 		g, err := LayerID(parentLayerPaths[i])
 		if err != nil {
-			logrus.Debugf("Failed to convert name to guid %s", err)
+			logrus.WithError(err).Debug("Failed to convert name to guid")
 			return nil, err
 		}
 
 		p, err := syscall.UTF16PtrFromString(parentLayerPaths[i])
 		if err != nil {
-			logrus.Debugf("Failed conversion of parentLayerPath to pointer %s", err)
+			logrus.WithError(err).Debug("Failed conversion of parentLayerPath to pointer")
 			return nil, err
 		}
 
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/nametoguid.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/nametoguid.go
index 741994ba4..45a63cf65 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/nametoguid.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/nametoguid.go
@@ -10,15 +10,25 @@ import (
 // Host Compute Service, ensuring GUIDs generated with the same string are common
 // across all clients.
 func NameToGuid(name string) (id guid.GUID, err error) {
-	title := "hcsshim::NameToGuid "
+	title := "hcsshim::NameToGuid"
+	fields := logrus.Fields{
+		"name": name,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	err = nameToGuid(name, &id)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "name=%s", name)
-		logrus.Error(err)
+		err = hcserror.New(err, title+" - failed", "")
 		return
 	}
-
-	logrus.Debugf(title+"name:%s guid:%s", name, id.String())
+	fields["guid"] = id.String()
 	return
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
index bd4005dc4..2b65b0186 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/preparelayer.go
@@ -14,9 +14,20 @@ var prepareLayerLock sync.Mutex
 // parent layers, and is necessary in order to view or interact with the layer
 // as an actual filesystem (reading and writing files, creating directories, etc).
 // Disabling the filter must be done via UnprepareLayer.
-func PrepareLayer(path string, parentLayerPaths []string) error {
-	title := "hcsshim::PrepareLayer "
-	logrus.Debugf(title+"path %s", path)
+func PrepareLayer(path string, parentLayerPaths []string) (err error) {
+	title := "hcsshim::PrepareLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
 	// Generate layer descriptors
 	layers, err := layerPathsToDescriptors(parentLayerPaths)
@@ -30,11 +41,7 @@ func PrepareLayer(path string, parentLayerPaths []string) error {
 	defer prepareLayerLock.Unlock()
 	err = prepareLayer(&stdDriverInfo, path, layers)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/unpreparelayer.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/unpreparelayer.go
index 5f1b4f4f4..bccd45969 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/unpreparelayer.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/unpreparelayer.go
@@ -7,17 +7,24 @@ import (
 
 // UnprepareLayer disables the filesystem filter for the read-write layer with
 // the given id.
-func UnprepareLayer(path string) error {
-	title := "hcsshim::UnprepareLayer "
-	logrus.Debugf(title+"path %s", path)
+func UnprepareLayer(path string) (err error) {
+	title := "hcsshim::UnprepareLayer"
+	fields := logrus.Fields{
+		"path": path,
+	}
+	logrus.WithFields(fields).Debug(title)
+	defer func() {
+		if err != nil {
+			fields[logrus.ErrorKey] = err
+			logrus.WithFields(fields).Error(err)
+		} else {
+			logrus.WithFields(fields).Debug(title + " - succeeded")
+		}
+	}()
 
-	err := unprepareLayer(&stdDriverInfo, path)
+	err = unprepareLayer(&stdDriverInfo, path)
 	if err != nil {
-		err = hcserror.Errorf(err, title, "path=%s", path)
-		logrus.Error(err)
-		return err
+		return hcserror.New(err, title+" - failed", "")
 	}
-
-	logrus.Debugf(title+"succeeded path=%s", path)
 	return nil
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/zsyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/zsyscall_windows.go
index 2105703dc..d853ab259 100644
--- a/vendor/github.com/Microsoft/hcsshim/internal/wclayer/zsyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/internal/wclayer/zsyscall_windows.go
@@ -6,7 +6,6 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/Microsoft/hcsshim/internal/interop"
 	"golang.org/x/sys/windows"
 )
 
@@ -75,7 +74,10 @@ func _activateLayer(info *driverInfo, id *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procActivateLayer.Addr(), 2, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -104,7 +106,10 @@ func _copyLayer(info *driverInfo, srcId *uint16, dstId *uint16, descriptors []WC
 	}
 	r0, _, _ := syscall.Syscall6(procCopyLayer.Addr(), 5, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(srcId)), uintptr(unsafe.Pointer(dstId)), uintptr(unsafe.Pointer(_p2)), uintptr(len(descriptors)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -129,7 +134,10 @@ func _createLayer(info *driverInfo, id *uint16, parent *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procCreateLayer.Addr(), 3, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(parent)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -153,7 +161,10 @@ func _createSandboxLayer(info *driverInfo, id *uint16, parent uintptr, descripto
 	}
 	r0, _, _ := syscall.Syscall6(procCreateSandboxLayer.Addr(), 5, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(parent), uintptr(unsafe.Pointer(_p1)), uintptr(len(descriptors)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -173,7 +184,10 @@ func _expandSandboxSize(info *driverInfo, id *uint16, size uint64) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procExpandSandboxSize.Addr(), 3, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(size))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -193,7 +207,10 @@ func _deactivateLayer(info *driverInfo, id *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procDeactivateLayer.Addr(), 2, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -213,7 +230,10 @@ func _destroyLayer(info *driverInfo, id *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procDestroyLayer.Addr(), 2, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -242,7 +262,10 @@ func _exportLayer(info *driverInfo, id *uint16, path *uint16, descriptors []WC_L
 	}
 	r0, _, _ := syscall.Syscall6(procExportLayer.Addr(), 5, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(path)), uintptr(unsafe.Pointer(_p2)), uintptr(len(descriptors)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -262,7 +285,10 @@ func _getLayerMountPath(info *driverInfo, id *uint16, length *uintptr, buffer *u
 	}
 	r0, _, _ := syscall.Syscall6(procGetLayerMountPath.Addr(), 4, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(length)), uintptr(unsafe.Pointer(buffer)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -273,7 +299,10 @@ func getBaseImages(buffer **uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procGetBaseImages.Addr(), 1, uintptr(unsafe.Pointer(buffer)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -302,7 +331,10 @@ func _importLayer(info *driverInfo, id *uint16, path *uint16, descriptors []WC_L
 	}
 	r0, _, _ := syscall.Syscall6(procImportLayer.Addr(), 5, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(path)), uintptr(unsafe.Pointer(_p2)), uintptr(len(descriptors)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -322,7 +354,10 @@ func _layerExists(info *driverInfo, id *uint16, exists *uint32) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procLayerExists.Addr(), 3, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(exists)))
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -342,7 +377,10 @@ func _nameToGuid(name *uint16, guid *_guid) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procNameToGuid.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(guid)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -366,7 +404,10 @@ func _prepareLayer(info *driverInfo, id *uint16, descriptors []WC_LAYER_DESCRIPT
 	}
 	r0, _, _ := syscall.Syscall6(procPrepareLayer.Addr(), 4, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), uintptr(unsafe.Pointer(_p1)), uintptr(len(descriptors)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -386,7 +427,10 @@ func _unprepareLayer(info *driverInfo, id *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procUnprepareLayer.Addr(), 2, uintptr(unsafe.Pointer(info)), uintptr(unsafe.Pointer(id)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -406,7 +450,10 @@ func _processBaseImage(path *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procProcessBaseImage.Addr(), 1, uintptr(unsafe.Pointer(path)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -426,7 +473,10 @@ func _processUtilityImage(path *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procProcessUtilityImage.Addr(), 1, uintptr(unsafe.Pointer(path)), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
@@ -451,7 +501,10 @@ func _grantVmAccess(vmid *uint16, filepath *uint16) (hr error) {
 	}
 	r0, _, _ := syscall.Syscall(procGrantVmAccess.Addr(), 2, uintptr(unsafe.Pointer(vmid)), uintptr(unsafe.Pointer(filepath)), 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
diff --git a/vendor/github.com/Microsoft/hcsshim/mksyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/mksyscall_windows.go
index 15660ddef..7647734de 100644
--- a/vendor/github.com/Microsoft/hcsshim/mksyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/mksyscall_windows.go
@@ -300,7 +300,10 @@ func (r *Rets) SetErrorCode() string {
 		%s = %sErrno(r0)
 	}`
 	const hrCode = `if int32(r0) < 0 {
-		%s = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		%s = %sErrno(r0)
 	}`
 	if r.Name == "" && !r.ReturnsError {
 		return ""
@@ -310,7 +313,7 @@ func (r *Rets) SetErrorCode() string {
 	}
 	if r.Type == "error" {
 		if r.Name == "hr" {
-			return fmt.Sprintf(hrCode, r.Name)
+			return fmt.Sprintf(hrCode, r.Name, syscalldot())
 		} else {
 			return fmt.Sprintf(code, r.Name, syscalldot())
 		}
@@ -773,7 +776,6 @@ func (src *Source) Generate(w io.Writer) error {
 			src.ExternalImport("golang.org/x/sys/windows")
 		}
 	}
-	src.ExternalImport("github.com/Microsoft/hcsshim/internal/interop")
 	if *winio {
 		src.ExternalImport("github.com/Microsoft/go-winio")
 	}
@@ -788,6 +790,9 @@ func (src *Source) Generate(w io.Writer) error {
 			if !*systemDLL {
 				return syscalldot() + "NewLazyDLL(" + arg + ")"
 			}
+			if strings.HasPrefix(dll, "api_") || strings.HasPrefix(dll, "ext_") {
+				arg = strings.Replace(arg, "_", "-", -1)
+			}
 			switch pkgtype {
 			case pkgStd:
 				return syscalldot() + "NewLazyDLL(sysdll.Add(" + arg + "))"
diff --git a/vendor/github.com/Microsoft/hcsshim/vendor.conf b/vendor/github.com/Microsoft/hcsshim/vendor.conf
new file mode 100644
index 000000000..6e0ed1566
--- /dev/null
+++ b/vendor/github.com/Microsoft/hcsshim/vendor.conf
@@ -0,0 +1,21 @@
+github.com/blang/semver v3.1.0
+github.com/containerd/console c12b1e7919c14469339a5d38f2f8ed9b64a9de23
+github.com/containerd/go-runc 5a6d9f37cfa36b15efba46dc7ea349fa9b7143c3
+github.com/hashicorp/errwrap 7554cd9344cec97297fa6649b055a8c98c2a1e55
+github.com/hashicorp/go-multierror ed905158d87462226a13fe39ddf685ea65f1c11f
+github.com/konsorten/go-windows-terminal-sequences v1.0.1
+github.com/linuxkit/virtsock 8e79449dea0735c1c056d814934dd035734cc97c
+github.com/Microsoft/go-winio 16cfc975803886a5e47c4257a24c8d8c52e178b2
+github.com/Microsoft/opengcs v0.3.9
+github.com/opencontainers/runtime-spec eba862dc2470385a233c7507392675cbeadf7353
+github.com/opencontainers/runtime-tools 1d69bd0f9c39677d0630e50664fbc3154ae61b88
+github.com/pkg/errors v0.8.1
+github.com/sirupsen/logrus v1.3.0
+github.com/syndtr/gocapability db04d3cc01c8b54962a58ec7e491717d06cfcc16
+github.com/urfave/cli 7bc6a0acffa589f415f88aca16cc1de5ffd66f9c
+github.com/xeipuuv/gojsonpointer 4e3ac2762d5f479393488629ee9370b50873b3a6
+github.com/xeipuuv/gojsonreference bd5ef7bd5415a7ac448318e64f11a24cd21e594b
+github.com/xeipuuv/gojsonschema 1d523034197ff1f222f6429836dd36a2457a1874
+golang.org/x/crypto ff983b9c42bc9fbf91556e191cc8efb585c16908
+golang.org/x/sync 37e7f081c4d4c64e13b10787722085407fe5d15f
+golang.org/x/sys e5ecc2a6747ce8d4af18ed98b3de5ae30eb3a5bb
\ No newline at end of file
diff --git a/vendor/github.com/Microsoft/hcsshim/zsyscall_windows.go b/vendor/github.com/Microsoft/hcsshim/zsyscall_windows.go
index d2dff9cb0..8bed84857 100644
--- a/vendor/github.com/Microsoft/hcsshim/zsyscall_windows.go
+++ b/vendor/github.com/Microsoft/hcsshim/zsyscall_windows.go
@@ -6,7 +6,6 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/Microsoft/hcsshim/internal/interop"
 	"golang.org/x/sys/windows"
 )
 
@@ -46,7 +45,10 @@ var (
 func SetCurrentThreadCompartmentId(compartmentId uint32) (hr error) {
 	r0, _, _ := syscall.Syscall(procSetCurrentThreadCompartmentId.Addr(), 1, uintptr(compartmentId), 0, 0)
 	if int32(r0) < 0 {
-		hr = interop.Win32FromHresult(r0)
+		if r0&0x1fff0000 == 0x00070000 {
+			r0 &= 0xffff
+		}
+		hr = syscall.Errno(r0)
 	}
 	return
 }
diff --git a/vendor/github.com/beorn7/perks/LICENSE b/vendor/github.com/beorn7/perks/LICENSE
new file mode 100644
index 000000000..339177be6
--- /dev/null
+++ b/vendor/github.com/beorn7/perks/LICENSE
@@ -0,0 +1,20 @@
+Copyright (C) 2013 Blake Mizerany
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/github.com/beorn7/perks/quantile/exampledata.txt b/vendor/github.com/beorn7/perks/quantile/exampledata.txt
new file mode 100644
index 000000000..1602287d7
--- /dev/null
+++ b/vendor/github.com/beorn7/perks/quantile/exampledata.txt
@@ -0,0 +1,2388 @@
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diff --git a/vendor/github.com/beorn7/perks/quantile/stream.go b/vendor/github.com/beorn7/perks/quantile/stream.go
new file mode 100644
index 000000000..d7d14f8eb
--- /dev/null
+++ b/vendor/github.com/beorn7/perks/quantile/stream.go
@@ -0,0 +1,316 @@
+// Package quantile computes approximate quantiles over an unbounded data
+// stream within low memory and CPU bounds.
+//
+// A small amount of accuracy is traded to achieve the above properties.
+//
+// Multiple streams can be merged before calling Query to generate a single set
+// of results. This is meaningful when the streams represent the same type of
+// data. See Merge and Samples.
+//
+// For more detailed information about the algorithm used, see:
+//
+// Effective Computation of Biased Quantiles over Data Streams
+//
+// http://www.cs.rutgers.edu/~muthu/bquant.pdf
+package quantile
+
+import (
+	"math"
+	"sort"
+)
+
+// Sample holds an observed value and meta information for compression. JSON
+// tags have been added for convenience.
+type Sample struct {
+	Value float64 `json:",string"`
+	Width float64 `json:",string"`
+	Delta float64 `json:",string"`
+}
+
+// Samples represents a slice of samples. It implements sort.Interface.
+type Samples []Sample
+
+func (a Samples) Len() int           { return len(a) }
+func (a Samples) Less(i, j int) bool { return a[i].Value < a[j].Value }
+func (a Samples) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+
+type invariant func(s *stream, r float64) float64
+
+// NewLowBiased returns an initialized Stream for low-biased quantiles
+// (e.g. 0.01, 0.1, 0.5) where the needed quantiles are not known a priori, but
+// error guarantees can still be given even for the lower ranks of the data
+// distribution.
+//
+// The provided epsilon is a relative error, i.e. the true quantile of a value
+// returned by a query is guaranteed to be within (1±Epsilon)*Quantile.
+//
+// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error
+// properties.
+func NewLowBiased(epsilon float64) *Stream {
+	ƒ := func(s *stream, r float64) float64 {
+		return 2 * epsilon * r
+	}
+	return newStream(ƒ)
+}
+
+// NewHighBiased returns an initialized Stream for high-biased quantiles
+// (e.g. 0.01, 0.1, 0.5) where the needed quantiles are not known a priori, but
+// error guarantees can still be given even for the higher ranks of the data
+// distribution.
+//
+// The provided epsilon is a relative error, i.e. the true quantile of a value
+// returned by a query is guaranteed to be within 1-(1±Epsilon)*(1-Quantile).
+//
+// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error
+// properties.
+func NewHighBiased(epsilon float64) *Stream {
+	ƒ := func(s *stream, r float64) float64 {
+		return 2 * epsilon * (s.n - r)
+	}
+	return newStream(ƒ)
+}
+
+// NewTargeted returns an initialized Stream concerned with a particular set of
+// quantile values that are supplied a priori. Knowing these a priori reduces
+// space and computation time. The targets map maps the desired quantiles to
+// their absolute errors, i.e. the true quantile of a value returned by a query
+// is guaranteed to be within (Quantile±Epsilon).
+//
+// See http://www.cs.rutgers.edu/~muthu/bquant.pdf for time, space, and error properties.
+func NewTargeted(targetMap map[float64]float64) *Stream {
+	// Convert map to slice to avoid slow iterations on a map.
+	// ƒ is called on the hot path, so converting the map to a slice
+	// beforehand results in significant CPU savings.
+	targets := targetMapToSlice(targetMap)
+
+	ƒ := func(s *stream, r float64) float64 {
+		var m = math.MaxFloat64
+		var f float64
+		for _, t := range targets {
+			if t.quantile*s.n <= r {
+				f = (2 * t.epsilon * r) / t.quantile
+			} else {
+				f = (2 * t.epsilon * (s.n - r)) / (1 - t.quantile)
+			}
+			if f < m {
+				m = f
+			}
+		}
+		return m
+	}
+	return newStream(ƒ)
+}
+
+type target struct {
+	quantile float64
+	epsilon  float64
+}
+
+func targetMapToSlice(targetMap map[float64]float64) []target {
+	targets := make([]target, 0, len(targetMap))
+
+	for quantile, epsilon := range targetMap {
+		t := target{
+			quantile: quantile,
+			epsilon:  epsilon,
+		}
+		targets = append(targets, t)
+	}
+
+	return targets
+}
+
+// Stream computes quantiles for a stream of float64s. It is not thread-safe by
+// design. Take care when using across multiple goroutines.
+type Stream struct {
+	*stream
+	b      Samples
+	sorted bool
+}
+
+func newStream(ƒ invariant) *Stream {
+	x := &stream{ƒ: ƒ}
+	return &Stream{x, make(Samples, 0, 500), true}
+}
+
+// Insert inserts v into the stream.
+func (s *Stream) Insert(v float64) {
+	s.insert(Sample{Value: v, Width: 1})
+}
+
+func (s *Stream) insert(sample Sample) {
+	s.b = append(s.b, sample)
+	s.sorted = false
+	if len(s.b) == cap(s.b) {
+		s.flush()
+	}
+}
+
+// Query returns the computed qth percentiles value. If s was created with
+// NewTargeted, and q is not in the set of quantiles provided a priori, Query
+// will return an unspecified result.
+func (s *Stream) Query(q float64) float64 {
+	if !s.flushed() {
+		// Fast path when there hasn't been enough data for a flush;
+		// this also yields better accuracy for small sets of data.
+		l := len(s.b)
+		if l == 0 {
+			return 0
+		}
+		i := int(math.Ceil(float64(l) * q))
+		if i > 0 {
+			i -= 1
+		}
+		s.maybeSort()
+		return s.b[i].Value
+	}
+	s.flush()
+	return s.stream.query(q)
+}
+
+// Merge merges samples into the underlying streams samples. This is handy when
+// merging multiple streams from separate threads, database shards, etc.
+//
+// ATTENTION: This method is broken and does not yield correct results. The
+// underlying algorithm is not capable of merging streams correctly.
+func (s *Stream) Merge(samples Samples) {
+	sort.Sort(samples)
+	s.stream.merge(samples)
+}
+
+// Reset reinitializes and clears the list reusing the samples buffer memory.
+func (s *Stream) Reset() {
+	s.stream.reset()
+	s.b = s.b[:0]
+}
+
+// Samples returns stream samples held by s.
+func (s *Stream) Samples() Samples {
+	if !s.flushed() {
+		return s.b
+	}
+	s.flush()
+	return s.stream.samples()
+}
+
+// Count returns the total number of samples observed in the stream
+// since initialization.
+func (s *Stream) Count() int {
+	return len(s.b) + s.stream.count()
+}
+
+func (s *Stream) flush() {
+	s.maybeSort()
+	s.stream.merge(s.b)
+	s.b = s.b[:0]
+}
+
+func (s *Stream) maybeSort() {
+	if !s.sorted {
+		s.sorted = true
+		sort.Sort(s.b)
+	}
+}
+
+func (s *Stream) flushed() bool {
+	return len(s.stream.l) > 0
+}
+
+type stream struct {
+	n float64
+	l []Sample
+	ƒ invariant
+}
+
+func (s *stream) reset() {
+	s.l = s.l[:0]
+	s.n = 0
+}
+
+func (s *stream) insert(v float64) {
+	s.merge(Samples{{v, 1, 0}})
+}
+
+func (s *stream) merge(samples Samples) {
+	// TODO(beorn7): This tries to merge not only individual samples, but
+	// whole summaries. The paper doesn't mention merging summaries at
+	// all. Unittests show that the merging is inaccurate. Find out how to
+	// do merges properly.
+	var r float64
+	i := 0
+	for _, sample := range samples {
+		for ; i < len(s.l); i++ {
+			c := s.l[i]
+			if c.Value > sample.Value {
+				// Insert at position i.
+				s.l = append(s.l, Sample{})
+				copy(s.l[i+1:], s.l[i:])
+				s.l[i] = Sample{
+					sample.Value,
+					sample.Width,
+					math.Max(sample.Delta, math.Floor(s.ƒ(s, r))-1),
+					// TODO(beorn7): How to calculate delta correctly?
+				}
+				i++
+				goto inserted
+			}
+			r += c.Width
+		}
+		s.l = append(s.l, Sample{sample.Value, sample.Width, 0})
+		i++
+	inserted:
+		s.n += sample.Width
+		r += sample.Width
+	}
+	s.compress()
+}
+
+func (s *stream) count() int {
+	return int(s.n)
+}
+
+func (s *stream) query(q float64) float64 {
+	t := math.Ceil(q * s.n)
+	t += math.Ceil(s.ƒ(s, t) / 2)
+	p := s.l[0]
+	var r float64
+	for _, c := range s.l[1:] {
+		r += p.Width
+		if r+c.Width+c.Delta > t {
+			return p.Value
+		}
+		p = c
+	}
+	return p.Value
+}
+
+func (s *stream) compress() {
+	if len(s.l) < 2 {
+		return
+	}
+	x := s.l[len(s.l)-1]
+	xi := len(s.l) - 1
+	r := s.n - 1 - x.Width
+
+	for i := len(s.l) - 2; i >= 0; i-- {
+		c := s.l[i]
+		if c.Width+x.Width+x.Delta <= s.ƒ(s, r) {
+			x.Width += c.Width
+			s.l[xi] = x
+			// Remove element at i.
+			copy(s.l[i:], s.l[i+1:])
+			s.l = s.l[:len(s.l)-1]
+			xi -= 1
+		} else {
+			x = c
+			xi = i
+		}
+		r -= c.Width
+	}
+}
+
+func (s *stream) samples() Samples {
+	samples := make(Samples, len(s.l))
+	copy(samples, s.l)
+	return samples
+}
diff --git a/vendor/github.com/blang/semver/.travis.yml b/vendor/github.com/blang/semver/.travis.yml
new file mode 100644
index 000000000..102fb9a69
--- /dev/null
+++ b/vendor/github.com/blang/semver/.travis.yml
@@ -0,0 +1,21 @@
+language: go
+matrix:
+  include:
+  - go: 1.4.3
+  - go: 1.5.4
+  - go: 1.6.3
+  - go: 1.7
+  - go: tip
+  allow_failures:
+  - go: tip
+install:
+- go get golang.org/x/tools/cmd/cover
+- go get github.com/mattn/goveralls
+script:
+- echo "Test and track coverage" ; $HOME/gopath/bin/goveralls -package "." -service=travis-ci
+  -repotoken $COVERALLS_TOKEN
+- echo "Build examples" ; cd examples && go build
+- echo "Check if gofmt'd" ; diff -u <(echo -n) <(gofmt -d -s .)
+env:
+  global:
+    secure: HroGEAUQpVq9zX1b1VIkraLiywhGbzvNnTZq2TMxgK7JHP8xqNplAeF1izrR2i4QLL9nsY+9WtYss4QuPvEtZcVHUobw6XnL6radF7jS1LgfYZ9Y7oF+zogZ2I5QUMRLGA7rcxQ05s7mKq3XZQfeqaNts4bms/eZRefWuaFZbkw=
diff --git a/vendor/github.com/blang/semver/README.md b/vendor/github.com/blang/semver/README.md
index 4399639e2..08b2e4a3d 100644
--- a/vendor/github.com/blang/semver/README.md
+++ b/vendor/github.com/blang/semver/README.md
@@ -1,4 +1,4 @@
-semver for golang [![Build Status](https://drone.io/github.com/blang/semver/status.png)](https://drone.io/github.com/blang/semver/latest) [![GoDoc](https://godoc.org/github.com/blang/semver?status.png)](https://godoc.org/github.com/blang/semver) [![Coverage Status](https://img.shields.io/coveralls/blang/semver.svg)](https://coveralls.io/r/blang/semver?branch=master)
+semver for golang [![Build Status](https://travis-ci.org/blang/semver.svg?branch=master)](https://travis-ci.org/blang/semver) [![GoDoc](https://godoc.org/github.com/blang/semver?status.png)](https://godoc.org/github.com/blang/semver) [![Coverage Status](https://img.shields.io/coveralls/blang/semver.svg)](https://coveralls.io/r/blang/semver?branch=master)
 ======
 
 semver is a [Semantic Versioning](http://semver.org/) library written in golang. It fully covers spec version `2.0.0`.
@@ -41,6 +41,7 @@ Features
 - Compare Helper Methods
 - InPlace manipulation
 - Ranges `>=1.0.0 <2.0.0 || >=3.0.0 !3.0.1-beta.1`
+- Wildcards `>=1.x`, `<=2.5.x`
 - Sortable (implements sort.Interface)
 - database/sql compatible (sql.Scanner/Valuer)
 - encoding/json compatible (json.Marshaler/Unmarshaler)
@@ -59,6 +60,8 @@ A condition is composed of an operator and a version. The supported operators ar
 - `1.0.0`, `=1.0.0`, `==1.0.0` Equal to `1.0.0`
 - `!1.0.0`, `!=1.0.0` Not equal to `1.0.0`. Excludes version `1.0.0`.
 
+Note that spaces between the operator and the version will be gracefully tolerated.
+
 A `Range` can link multiple `Ranges` separated by space:
 
 Ranges can be linked by logical AND:
diff --git a/vendor/github.com/blang/semver/package.json b/vendor/github.com/blang/semver/package.json
index 568be8d94..1cf8ebdd9 100644
--- a/vendor/github.com/blang/semver/package.json
+++ b/vendor/github.com/blang/semver/package.json
@@ -12,6 +12,6 @@
   "license": "MIT",
   "name": "semver",
   "releaseCmd": "git commit -a -m \"gx publish $VERSION\"",
-  "version": "3.4.0"
+  "version": "3.5.1"
 }
 
diff --git a/vendor/github.com/checkpoint-restore/go-criu/README.md b/vendor/github.com/checkpoint-restore/go-criu/README.md
index 610756dbd..539627324 100644
--- a/vendor/github.com/checkpoint-restore/go-criu/README.md
+++ b/vendor/github.com/checkpoint-restore/go-criu/README.md
@@ -21,6 +21,14 @@ or to just check if at least a certain CRIU version is installed:
 	result, err := c.IsCriuAtLeast(31100)
 ```
 
+## Releases
+
+go-criu will carry the same version number as CRIU. This implies that each
+go-criu release will pull in the necessary changes from CRIU before making a
+release.
+
+The first go-criu release was 3.11 based on CRIU 3.11.
+
 ## How to contribute
 
 While bug fixes can first be identified via an "issue", that is not required.
diff --git a/vendor/github.com/containerd/cgroups/.travis.yml b/vendor/github.com/containerd/cgroups/.travis.yml
index 87da63f3a..98eaf8dda 100644
--- a/vendor/github.com/containerd/cgroups/.travis.yml
+++ b/vendor/github.com/containerd/cgroups/.travis.yml
@@ -1,7 +1,9 @@
 language: go
 go:
-    - 1.10.x
     - 1.11.x
+    - 1.12.x
+
+go_import_path: github.com/containerd/cgroups
 
 install:
     - mkdir -p $GOPATH/src/github.com/prometheus $GOPATH/src/github.com/opencontainers $GOPATH/src/github.com/coreos $GOPATH/src/github.com/godbus
diff --git a/vendor/github.com/containerd/cgroups/cgroup.go b/vendor/github.com/containerd/cgroups/cgroup.go
index e3ef07651..53866685b 100644
--- a/vendor/github.com/containerd/cgroups/cgroup.go
+++ b/vendor/github.com/containerd/cgroups/cgroup.go
@@ -497,6 +497,9 @@ func (c *cgroup) MoveTo(destination Cgroup) error {
 		}
 		for _, p := range processes {
 			if err := destination.Add(p); err != nil {
+				if strings.Contains(err.Error(), "no such process") {
+					continue
+				}
 				return err
 			}
 		}
diff --git a/vendor/github.com/containerd/cgroups/metrics.pb.go b/vendor/github.com/containerd/cgroups/metrics.pb.go
index 6043a8f7d..7dd7f6f3c 100644
--- a/vendor/github.com/containerd/cgroups/metrics.pb.go
+++ b/vendor/github.com/containerd/cgroups/metrics.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-gogo.
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
 // source: github.com/containerd/cgroups/metrics.proto
-// DO NOT EDIT!
 
 /*
 	Package cgroups is a generated protocol buffer package.
@@ -21,6 +20,7 @@
 		BlkIOEntry
 		RdmaStat
 		RdmaEntry
+		NetworkStat
 */
 package cgroups
 
@@ -52,6 +52,7 @@ type Metrics struct {
 	Memory  *MemoryStat    `protobuf:"bytes,4,opt,name=memory" json:"memory,omitempty"`
 	Blkio   *BlkIOStat     `protobuf:"bytes,5,opt,name=blkio" json:"blkio,omitempty"`
 	Rdma    *RdmaStat      `protobuf:"bytes,6,opt,name=rdma" json:"rdma,omitempty"`
+	Network []*NetworkStat `protobuf:"bytes,7,rep,name=network" json:"network,omitempty"`
 }
 
 func (m *Metrics) Reset()                    { *m = Metrics{} }
@@ -209,6 +210,22 @@ func (m *RdmaEntry) Reset()                    { *m = RdmaEntry{} }
 func (*RdmaEntry) ProtoMessage()               {}
 func (*RdmaEntry) Descriptor() ([]byte, []int) { return fileDescriptorMetrics, []int{11} }
 
+type NetworkStat struct {
+	Name      string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	RxBytes   uint64 `protobuf:"varint,2,opt,name=rx_bytes,json=rxBytes,proto3" json:"rx_bytes,omitempty"`
+	RxPackets uint64 `protobuf:"varint,3,opt,name=rx_packets,json=rxPackets,proto3" json:"rx_packets,omitempty"`
+	RxErrors  uint64 `protobuf:"varint,4,opt,name=rx_errors,json=rxErrors,proto3" json:"rx_errors,omitempty"`
+	RxDropped uint64 `protobuf:"varint,5,opt,name=rx_dropped,json=rxDropped,proto3" json:"rx_dropped,omitempty"`
+	TxBytes   uint64 `protobuf:"varint,6,opt,name=tx_bytes,json=txBytes,proto3" json:"tx_bytes,omitempty"`
+	TxPackets uint64 `protobuf:"varint,7,opt,name=tx_packets,json=txPackets,proto3" json:"tx_packets,omitempty"`
+	TxErrors  uint64 `protobuf:"varint,8,opt,name=tx_errors,json=txErrors,proto3" json:"tx_errors,omitempty"`
+	TxDropped uint64 `protobuf:"varint,9,opt,name=tx_dropped,json=txDropped,proto3" json:"tx_dropped,omitempty"`
+}
+
+func (m *NetworkStat) Reset()                    { *m = NetworkStat{} }
+func (*NetworkStat) ProtoMessage()               {}
+func (*NetworkStat) Descriptor() ([]byte, []int) { return fileDescriptorMetrics, []int{12} }
+
 func init() {
 	proto.RegisterType((*Metrics)(nil), "io.containerd.cgroups.v1.Metrics")
 	proto.RegisterType((*HugetlbStat)(nil), "io.containerd.cgroups.v1.HugetlbStat")
@@ -222,6 +239,7 @@ func init() {
 	proto.RegisterType((*BlkIOEntry)(nil), "io.containerd.cgroups.v1.BlkIOEntry")
 	proto.RegisterType((*RdmaStat)(nil), "io.containerd.cgroups.v1.RdmaStat")
 	proto.RegisterType((*RdmaEntry)(nil), "io.containerd.cgroups.v1.RdmaEntry")
+	proto.RegisterType((*NetworkStat)(nil), "io.containerd.cgroups.v1.NetworkStat")
 }
 func (m *Metrics) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
@@ -300,6 +318,18 @@ func (m *Metrics) MarshalTo(dAtA []byte) (int, error) {
 		}
 		i += n5
 	}
+	if len(m.Network) > 0 {
+		for _, msg := range m.Network {
+			dAtA[i] = 0x3a
+			i++
+			i = encodeVarintMetrics(dAtA, i, uint64(msg.Size()))
+			n, err := msg.MarshalTo(dAtA[i:])
+			if err != nil {
+				return 0, err
+			}
+			i += n
+		}
+	}
 	return i, nil
 }
 
@@ -389,21 +419,21 @@ func (m *CPUStat) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0xa
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.Usage.Size()))
-		n5, err := m.Usage.MarshalTo(dAtA[i:])
+		n6, err := m.Usage.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n5
+		i += n6
 	}
 	if m.Throttling != nil {
 		dAtA[i] = 0x12
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.Throttling.Size()))
-		n6, err := m.Throttling.MarshalTo(dAtA[i:])
+		n7, err := m.Throttling.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n6
+		i += n7
 	}
 	return i, nil
 }
@@ -439,21 +469,21 @@ func (m *CPUUsage) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintMetrics(dAtA, i, uint64(m.User))
 	}
 	if len(m.PerCPU) > 0 {
-		dAtA8 := make([]byte, len(m.PerCPU)*10)
-		var j7 int
+		dAtA9 := make([]byte, len(m.PerCPU)*10)
+		var j8 int
 		for _, num := range m.PerCPU {
 			for num >= 1<<7 {
-				dAtA8[j7] = uint8(uint64(num)&0x7f | 0x80)
+				dAtA9[j8] = uint8(uint64(num)&0x7f | 0x80)
 				num >>= 7
-				j7++
+				j8++
 			}
-			dAtA8[j7] = uint8(num)
-			j7++
+			dAtA9[j8] = uint8(num)
+			j8++
 		}
 		dAtA[i] = 0x22
 		i++
-		i = encodeVarintMetrics(dAtA, i, uint64(j7))
-		i += copy(dAtA[i:], dAtA8[:j7])
+		i = encodeVarintMetrics(dAtA, i, uint64(j8))
+		i += copy(dAtA[i:], dAtA9[:j8])
 	}
 	return i, nil
 }
@@ -706,11 +736,11 @@ func (m *MemoryStat) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x2
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.Usage.Size()))
-		n9, err := m.Usage.MarshalTo(dAtA[i:])
+		n10, err := m.Usage.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n9
+		i += n10
 	}
 	if m.Swap != nil {
 		dAtA[i] = 0x92
@@ -718,11 +748,11 @@ func (m *MemoryStat) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x2
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.Swap.Size()))
-		n10, err := m.Swap.MarshalTo(dAtA[i:])
+		n11, err := m.Swap.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n10
+		i += n11
 	}
 	if m.Kernel != nil {
 		dAtA[i] = 0x9a
@@ -730,11 +760,11 @@ func (m *MemoryStat) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x2
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.Kernel.Size()))
-		n11, err := m.Kernel.MarshalTo(dAtA[i:])
+		n12, err := m.Kernel.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n11
+		i += n12
 	}
 	if m.KernelTCP != nil {
 		dAtA[i] = 0xa2
@@ -742,11 +772,11 @@ func (m *MemoryStat) MarshalTo(dAtA []byte) (int, error) {
 		dAtA[i] = 0x2
 		i++
 		i = encodeVarintMetrics(dAtA, i, uint64(m.KernelTCP.Size()))
-		n12, err := m.KernelTCP.MarshalTo(dAtA[i:])
+		n13, err := m.KernelTCP.MarshalTo(dAtA[i:])
 		if err != nil {
 			return 0, err
 		}
-		i += n12
+		i += n13
 	}
 	return i, nil
 }
@@ -766,7 +796,6 @@ func (m *MemoryEntry) MarshalTo(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
-
 	if m.Limit != 0 {
 		dAtA[i] = 0x8
 		i++
@@ -1025,24 +1054,70 @@ func (m *RdmaEntry) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
-func encodeFixed64Metrics(dAtA []byte, offset int, v uint64) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	dAtA[offset+4] = uint8(v >> 32)
-	dAtA[offset+5] = uint8(v >> 40)
-	dAtA[offset+6] = uint8(v >> 48)
-	dAtA[offset+7] = uint8(v >> 56)
-	return offset + 8
+func (m *NetworkStat) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
 }
-func encodeFixed32Metrics(dAtA []byte, offset int, v uint32) int {
-	dAtA[offset] = uint8(v)
-	dAtA[offset+1] = uint8(v >> 8)
-	dAtA[offset+2] = uint8(v >> 16)
-	dAtA[offset+3] = uint8(v >> 24)
-	return offset + 4
+
+func (m *NetworkStat) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.Name) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(len(m.Name)))
+		i += copy(dAtA[i:], m.Name)
+	}
+	if m.RxBytes != 0 {
+		dAtA[i] = 0x10
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.RxBytes))
+	}
+	if m.RxPackets != 0 {
+		dAtA[i] = 0x18
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.RxPackets))
+	}
+	if m.RxErrors != 0 {
+		dAtA[i] = 0x20
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.RxErrors))
+	}
+	if m.RxDropped != 0 {
+		dAtA[i] = 0x28
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.RxDropped))
+	}
+	if m.TxBytes != 0 {
+		dAtA[i] = 0x30
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.TxBytes))
+	}
+	if m.TxPackets != 0 {
+		dAtA[i] = 0x38
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.TxPackets))
+	}
+	if m.TxErrors != 0 {
+		dAtA[i] = 0x40
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.TxErrors))
+	}
+	if m.TxDropped != 0 {
+		dAtA[i] = 0x48
+		i++
+		i = encodeVarintMetrics(dAtA, i, uint64(m.TxDropped))
+	}
+	return i, nil
 }
+
 func encodeVarintMetrics(dAtA []byte, offset int, v uint64) int {
 	for v >= 1<<7 {
 		dAtA[offset] = uint8(v&0x7f | 0x80)
@@ -1081,6 +1156,12 @@ func (m *Metrics) Size() (n int) {
 		l = m.Rdma.Size()
 		n += 1 + l + sovMetrics(uint64(l))
 	}
+	if len(m.Network) > 0 {
+		for _, e := range m.Network {
+			l = e.Size()
+			n += 1 + l + sovMetrics(uint64(l))
+		}
+	}
 	return n
 }
 
@@ -1413,6 +1494,40 @@ func (m *RdmaEntry) Size() (n int) {
 	return n
 }
 
+func (m *NetworkStat) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.Name)
+	if l > 0 {
+		n += 1 + l + sovMetrics(uint64(l))
+	}
+	if m.RxBytes != 0 {
+		n += 1 + sovMetrics(uint64(m.RxBytes))
+	}
+	if m.RxPackets != 0 {
+		n += 1 + sovMetrics(uint64(m.RxPackets))
+	}
+	if m.RxErrors != 0 {
+		n += 1 + sovMetrics(uint64(m.RxErrors))
+	}
+	if m.RxDropped != 0 {
+		n += 1 + sovMetrics(uint64(m.RxDropped))
+	}
+	if m.TxBytes != 0 {
+		n += 1 + sovMetrics(uint64(m.TxBytes))
+	}
+	if m.TxPackets != 0 {
+		n += 1 + sovMetrics(uint64(m.TxPackets))
+	}
+	if m.TxErrors != 0 {
+		n += 1 + sovMetrics(uint64(m.TxErrors))
+	}
+	if m.TxDropped != 0 {
+		n += 1 + sovMetrics(uint64(m.TxDropped))
+	}
+	return n
+}
+
 func sovMetrics(x uint64) (n int) {
 	for {
 		n++
@@ -1437,6 +1552,7 @@ func (this *Metrics) String() string {
 		`Memory:` + strings.Replace(fmt.Sprintf("%v", this.Memory), "MemoryStat", "MemoryStat", 1) + `,`,
 		`Blkio:` + strings.Replace(fmt.Sprintf("%v", this.Blkio), "BlkIOStat", "BlkIOStat", 1) + `,`,
 		`Rdma:` + strings.Replace(fmt.Sprintf("%v", this.Rdma), "RdmaStat", "RdmaStat", 1) + `,`,
+		`Network:` + strings.Replace(fmt.Sprintf("%v", this.Network), "NetworkStat", "NetworkStat", 1) + `,`,
 		`}`,
 	}, "")
 	return s
@@ -1613,6 +1729,24 @@ func (this *RdmaEntry) String() string {
 	}, "")
 	return s
 }
+func (this *NetworkStat) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&NetworkStat{`,
+		`Name:` + fmt.Sprintf("%v", this.Name) + `,`,
+		`RxBytes:` + fmt.Sprintf("%v", this.RxBytes) + `,`,
+		`RxPackets:` + fmt.Sprintf("%v", this.RxPackets) + `,`,
+		`RxErrors:` + fmt.Sprintf("%v", this.RxErrors) + `,`,
+		`RxDropped:` + fmt.Sprintf("%v", this.RxDropped) + `,`,
+		`TxBytes:` + fmt.Sprintf("%v", this.TxBytes) + `,`,
+		`TxPackets:` + fmt.Sprintf("%v", this.TxPackets) + `,`,
+		`TxErrors:` + fmt.Sprintf("%v", this.TxErrors) + `,`,
+		`TxDropped:` + fmt.Sprintf("%v", this.TxDropped) + `,`,
+		`}`,
+	}, "")
+	return s
+}
 func valueToStringMetrics(v interface{}) string {
 	rv := reflect.ValueOf(v)
 	if rv.IsNil() {
@@ -1624,7 +1758,6 @@ func valueToStringMetrics(v interface{}) string {
 func (m *Metrics) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
-
 	for iNdEx < l {
 		preIndex := iNdEx
 		var wire uint64
@@ -1847,6 +1980,37 @@ func (m *Metrics) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 7:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Network", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthMetrics
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Network = append(m.Network, &NetworkStat{})
+			if err := m.Network[len(m.Network)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipMetrics(dAtA[iNdEx:])
@@ -4092,7 +4256,237 @@ func (m *RdmaEntry) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *NetworkStat) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowMetrics
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: NetworkStat: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: NetworkStat: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Name", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthMetrics
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Name = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RxBytes", wireType)
+			}
+			m.RxBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.RxBytes |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RxPackets", wireType)
+			}
+			m.RxPackets = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.RxPackets |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RxErrors", wireType)
+			}
+			m.RxErrors = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.RxErrors |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 5:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RxDropped", wireType)
+			}
+			m.RxDropped = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.RxDropped |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 6:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TxBytes", wireType)
+			}
+			m.TxBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.TxBytes |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 7:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TxPackets", wireType)
+			}
+			m.TxPackets = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.TxPackets |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 8:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TxErrors", wireType)
+			}
+			m.TxErrors = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.TxErrors |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 9:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field TxDropped", wireType)
+			}
+			m.TxDropped = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowMetrics
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.TxDropped |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipMetrics(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthMetrics
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
 
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipMetrics(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0
@@ -4201,88 +4595,102 @@ var (
 func init() { proto.RegisterFile("github.com/containerd/cgroups/metrics.proto", fileDescriptorMetrics) }
 
 var fileDescriptorMetrics = []byte{
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+	0xac, 0x02, 0xe4, 0x56, 0x97, 0xfb, 0xf5, 0xb0, 0xd7, 0xcb, 0xfc, 0xa1, 0x06, 0x68, 0x05, 0x8a,
+	0x3c, 0x4a, 0x42, 0xe9, 0x13, 0xe5, 0xb4, 0xdb, 0x8e, 0x9c, 0x43, 0xff, 0x82, 0x0a, 0x8f, 0x22,
+	0x57, 0x1e, 0x6b, 0x1d, 0xa0, 0x59, 0x1d, 0x9d, 0xd7, 0xca, 0x4e, 0xbb, 0x2d, 0x6d, 0xe7, 0x94,
+	0x79, 0x14, 0xc9, 0x07, 0x54, 0x83, 0xea, 0x00, 0x87, 0x21, 0xe9, 0xba, 0x6f, 0x68, 0x5f, 0x3b,
+	0xa7, 0xe4, 0x80, 0x9e, 0x7a, 0x46, 0xfb, 0xaa, 0xd2, 0x5d, 0xca, 0xc5, 0x99, 0x3a, 0x5c, 0x25,
+	0x47, 0x0f, 0xd0, 0x2d, 0xb0, 0x4e, 0x39, 0x15, 0xa4, 0x83, 0xbd, 0x63, 0x75, 0x78, 0x4a, 0x4e,
+	0x3e, 0x81, 0x6c, 0xa8, 0x84, 0xbe, 0x1b, 0xfa, 0x2e, 0x0d, 0xec, 0xb2, 0x7e, 0x13, 0xa1, 0xdf,
+	0xf2, 0x5f, 0x04, 0x68, 0x15, 0x2c, 0xbd, 0xc2, 0x62, 0x61, 0x57, 0x92, 0x32, 0xfa, 0x2d, 0xff,
+	0x65, 0x2c, 0xd0, 0x8a, 0x62, 0xbd, 0xc1, 0x71, 0x5f, 0xd8, 0x56, 0xba, 0xf4, 0x4c, 0x0e, 0xd1,
+	0x3a, 0xcc, 0x86, 0xbe, 0x3b, 0xc0, 0x47, 0xc9, 0x32, 0xe8, 0x34, 0x43, 0x7f, 0x1f, 0x1f, 0x69,
+	0xc4, 0x06, 0xcc, 0xd1, 0x00, 0x7b, 0x82, 0x9e, 0x10, 0x17, 0x07, 0x2c, 0xb0, 0xab, 0x0a, 0x32,
+	0x9b, 0x4e, 0x3e, 0x0e, 0x58, 0x20, 0x37, 0x6b, 0x42, 0x66, 0xb5, 0x8a, 0x01, 0x30, 0x55, 0x54,
+	0x3d, 0xe6, 0xc6, 0x55, 0x54, 0x45, 0x72, 0x15, 0x05, 0x99, 0x37, 0x55, 0x14, 0x60, 0x1d, 0xaa,
+	0x71, 0x40, 0x4e, 0xa8, 0x27, 0x70, 0xa7, 0x4f, 0xec, 0xab, 0x0a, 0x60, 0x4e, 0xa1, 0x07, 0xb0,
+	0xd2, 0xa3, 0x84, 0x63, 0xee, 0xf5, 0xa8, 0x87, 0xfb, 0xae, 0xfe, 0x90, 0xb9, 0xfa, 0xf8, 0x2d,
+	0x28, 0xfc, 0x0d, 0x13, 0xa0, 0x9d, 0xf0, 0x8d, 0x5c, 0x46, 0xf7, 0x60, 0x6c, 0xc9, 0x8d, 0x4e,
+	0x71, 0x98, 0x30, 0x17, 0x15, 0xf3, 0xba, 0xb9, 0xdc, 0x3e, 0xc5, 0xa1, 0xe6, 0xd5, 0xa0, 0xaa,
+	0x4e, 0x89, 0xab, 0x8d, 0x84, 0x74, 0xda, 0x6a, 0x6a, 0x4f, 0xb9, 0xe9, 0x3f, 0x60, 0x69, 0x80,
+	0xf4, 0xd4, 0x92, 0xf2, 0xcc, 0xec, 0xe8, 0xbc, 0x56, 0x39, 0x90, 0x93, 0xd2, 0x58, 0x15, 0xb5,
+	0xec, 0x44, 0x11, 0xba, 0x07, 0xf3, 0x19, 0x54, 0x7b, 0xec, 0x9a, 0xc2, 0x2f, 0x8c, 0xce, 0x6b,
+	0xb3, 0x29, 0x5e, 0x19, 0x6d, 0x36, 0xe5, 0x28, 0xb7, 0xfd, 0x17, 0x16, 0x35, 0xcf, 0xf4, 0xdc,
+	0x75, 0x95, 0xc9, 0x55, 0xb5, 0xb0, 0x9f, 0x1b, 0x2f, 0xcb, 0x57, 0xdb, 0x6f, 0xd9, 0xc8, 0xf7,
+	0x89, 0xf2, 0xe0, 0xbf, 0x41, 0x73, 0xdc, 0xdc, 0x89, 0x37, 0x14, 0x48, 0xe7, 0xf6, 0x3a, 0xb3,
+	0xe3, 0x46, 0x9a, 0x6d, 0x66, 0x4a, 0x5b, 0xbf, 0x12, 0x35, 0xdb, 0xd2, 0xce, 0xdc, 0x4a, 0xd5,
+	0x72, 0x7f, 0xae, 0xe8, 0x97, 0x9f, 0xa1, 0xa4, 0x49, 0x37, 0x0d, 0x2d, 0xed, 0xc5, 0xd5, 0x31,
+	0x94, 0x76, 0xe3, 0x0e, 0xa0, 0x0c, 0x95, 0xbb, 0xf6, 0xa6, 0xb1, 0xd1, 0x56, 0x6e, 0xdd, 0x06,
+	0x2c, 0x69, 0xf0, 0xb8, 0x81, 0x6f, 0x29, 0xb4, 0xae, 0xd7, 0x0b, 0xd3, 0xc5, 0x59, 0x11, 0x4d,
+	0xf4, 0x6d, 0x43, 0xfb, 0x71, 0x8e, 0xfd, 0x58, 0x5b, 0x95, 0x7c, 0xed, 0x13, 0xda, 0xaa, 0xe8,
+	0x1f, 0x6a, 0x2b, 0x74, 0xed, 0x23, 0x6d, 0x85, 0xdd, 0x49, 0xb1, 0xa6, 0xd9, 0xd7, 0x93, 0xcf,
+	0x9e, 0x5c, 0x38, 0x34, 0x1c, 0xff, 0x65, 0x7a, 0x75, 0xdc, 0x51, 0xdf, 0xfe, 0xad, 0xcb, 0x2e,
+	0xf8, 0xa7, 0x81, 0xe0, 0x67, 0xe9, 0xed, 0x71, 0x1f, 0x4a, 0xd2, 0xe5, 0x76, 0x7d, 0x12, 0xae,
+	0xa2, 0xa0, 0x47, 0xd9, 0x95, 0xb0, 0x31, 0x09, 0x39, 0xbd, 0x39, 0xda, 0x00, 0xfa, 0xc9, 0x15,
+	0x5e, 0x68, 0x6f, 0x4e, 0x20, 0xd1, 0x9c, 0x1b, 0x9d, 0xd7, 0xac, 0xaf, 0x15, 0xf9, 0x60, 0xaf,
+	0xe5, 0x58, 0x5a, 0xe7, 0xc0, 0x0b, 0xeb, 0x04, 0xaa, 0x06, 0x30, 0xbf, 0x77, 0x0b, 0xc6, 0xbd,
+	0x9b, 0x77, 0x04, 0x53, 0x9f, 0xe8, 0x08, 0x8a, 0x9f, 0xec, 0x08, 0x4a, 0x63, 0x1d, 0x41, 0xfd,
+	0xf7, 0x69, 0xb0, 0xb2, 0x86, 0x07, 0x61, 0x58, 0xa5, 0xcc, 0x8d, 0x08, 0x3f, 0xa1, 0x1e, 0x71,
+	0x3b, 0x67, 0x82, 0x44, 0x2e, 0x27, 0x5e, 0xcc, 0x23, 0x7a, 0x42, 0x92, 0x66, 0x71, 0xf3, 0x92,
+	0xce, 0x49, 0xd7, 0xe6, 0x06, 0x65, 0x6d, 0x2d, 0xd3, 0x94, 0x2a, 0x4e, 0x2a, 0x82, 0xbe, 0x83,
+	0xeb, 0x79, 0x88, 0xae, 0xa1, 0x3e, 0x35, 0x81, 0xfa, 0x52, 0xa6, 0xde, 0xcd, 0x95, 0x0f, 0x60,
+	0x89, 0x32, 0xf7, 0x6d, 0x4c, 0xe2, 0x31, 0xdd, 0xe2, 0x04, 0xba, 0x8b, 0x94, 0xbd, 0x52, 0xfc,
+	0x5c, 0xd5, 0x85, 0x15, 0xa3, 0x24, 0xf2, 0x2e, 0x36, 0xb4, 0x4b, 0x13, 0x68, 0x2f, 0x67, 0x39,
+	0xcb, 0xbb, 0x3b, 0x0f, 0xf0, 0x3d, 0x2c, 0x53, 0xe6, 0x9e, 0x62, 0x2a, 0x3e, 0x54, 0x9f, 0x9e,
+	0xac, 0x22, 0xaf, 0x31, 0x15, 0xe3, 0xd2, 0xba, 0x22, 0x03, 0xc2, 0xfd, 0xb1, 0x8a, 0xcc, 0x4c,
+	0x56, 0x91, 0x7d, 0xc5, 0xcf, 0x55, 0x5b, 0xb0, 0x48, 0xd9, 0x87, 0xb9, 0x96, 0x27, 0xd0, 0xbc,
+	0x4a, 0xd9, 0x78, 0x9e, 0xaf, 0x60, 0x31, 0x22, 0x9e, 0x60, 0xdc, 0x74, 0x5b, 0x65, 0x02, 0xc5,
+	0x85, 0x84, 0x9e, 0x49, 0xd6, 0x4f, 0x00, 0xf2, 0x75, 0x34, 0x0f, 0x53, 0x2c, 0x54, 0x47, 0xc7,
+	0x72, 0xa6, 0x58, 0x28, 0x7b, 0xc0, 0xae, 0xfc, 0xec, 0xe8, 0x83, 0x63, 0x39, 0xc9, 0x48, 0x9e,
+	0xa7, 0x01, 0x3e, 0x62, 0x69, 0x13, 0xa8, 0x07, 0x6a, 0x96, 0x06, 0x8c, 0x27, 0x67, 0x47, 0x0f,
+	0xe4, 0xec, 0x09, 0xee, 0xc7, 0x24, 0xed, 0x79, 0xd4, 0xa0, 0xfe, 0x53, 0x01, 0x2a, 0xe9, 0x6f,
+	0x00, 0x7a, 0x64, 0xb6, 0xd1, 0xc5, 0xcf, 0xff, 0x75, 0x48, 0x92, 0xde, 0x4c, 0xd6, 0x6b, 0xdf,
+	0xcf, 0x7b, 0xed, 0x7f, 0x4c, 0x4e, 0x1a, 0x72, 0x02, 0x56, 0x36, 0x67, 0xec, 0xb6, 0x30, 0xb6,
+	0xdb, 0x1a, 0x54, 0x7b, 0x1e, 0x76, 0x7b, 0x38, 0xe8, 0xf6, 0x89, 0xee, 0x10, 0xe7, 0x1c, 0xe8,
+	0x79, 0xf8, 0xb9, 0x9e, 0x49, 0x01, 0xac, 0x73, 0x44, 0x3c, 0x11, 0xa9, 0xa2, 0x68, 0xc0, 0x4b,
+	0x3d, 0x53, 0xff, 0x65, 0x0a, 0xaa, 0xc6, 0x9f, 0x8b, 0xec, 0xa1, 0x03, 0x3c, 0x48, 0xe3, 0xa8,
+	0x67, 0xd9, 0xb1, 0xf1, 0xa1, 0xfe, 0x96, 0x24, 0x9f, 0xa9, 0x32, 0x1f, 0xaa, 0x8f, 0x02, 0xba,
+	0x0d, 0xc0, 0x87, 0x6e, 0x88, 0xbd, 0x63, 0x92, 0xc8, 0x97, 0x1c, 0x8b, 0x0f, 0x5b, 0x7a, 0x02,
+	0xdd, 0x04, 0x8b, 0x0f, 0x5d, 0xc2, 0x39, 0xe3, 0x51, 0x52, 0xfb, 0x0a, 0x1f, 0x3e, 0x55, 0xe3,
+	0x84, 0xdb, 0xe5, 0x4c, 0xf6, 0x02, 0xc9, 0x3b, 0xb0, 0xf8, 0xf0, 0x89, 0x9e, 0x90, 0x51, 0x45,
+	0x1a, 0x55, 0xb7, 0x9e, 0x65, 0x91, 0x47, 0x15, 0x79, 0x54, 0xdd, 0x7a, 0x5a, 0xc2, 0x8c, 0x2a,
+	0xb2, 0xa8, 0xba, 0xfb, 0xac, 0x08, 0x23, 0xaa, 0xc8, 0xa3, 0x5a, 0x29, 0x37, 0x89, 0xda, 0xb4,
+	0xdf, 0xbd, 0x5f, 0xbb, 0xf2, 0xc7, 0xfb, 0xb5, 0x2b, 0x3f, 0x8e, 0xd6, 0x0a, 0xef, 0x46, 0x6b,
+	0x85, 0xdf, 0x46, 0x6b, 0x85, 0xbf, 0x46, 0x6b, 0x85, 0xce, 0x8c, 0xfa, 0x0d, 0xff, 0xff, 0xdf,
+	0x01, 0x00, 0x00, 0xff, 0xff, 0x19, 0x9d, 0xe2, 0xd3, 0xe5, 0x0f, 0x00, 0x00,
 }
diff --git a/vendor/github.com/containerd/cgroups/metrics.pb.txt b/vendor/github.com/containerd/cgroups/metrics.pb.txt
index 86aacd541..5b0f10a34 100644
--- a/vendor/github.com/containerd/cgroups/metrics.pb.txt
+++ b/vendor/github.com/containerd/cgroups/metrics.pb.txt
@@ -55,6 +55,14 @@ file {
       type_name: ".io.containerd.cgroups.v1.RdmaStat"
       json_name: "rdma"
     }
+    field {
+      name: "network"
+      number: 7
+      label: LABEL_REPEATED
+      type: TYPE_MESSAGE
+      type_name: ".io.containerd.cgroups.v1.NetworkStat"
+      json_name: "network"
+    }
   }
   message_type {
     name: "HugetlbStat"
@@ -614,24 +622,90 @@ file {
     name: "RdmaEntry"
     field {
       name: "device"
-      number: 2
+      number: 1
       label: LABEL_OPTIONAL
       type: TYPE_STRING
       json_name: "device"
     }
     field {
       name: "hca_handles"
-      number: 1
+      number: 2
       label: LABEL_OPTIONAL
-      type: TYPE_UINT64
-      json_name: "hca_handles"
+      type: TYPE_UINT32
+      json_name: "hcaHandles"
     }
     field {
       name: "hca_objects"
+      number: 3
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT32
+      json_name: "hcaObjects"
+    }
+  }
+  message_type {
+    name: "NetworkStat"
+    field {
+      name: "name"
       number: 1
       label: LABEL_OPTIONAL
+      type: TYPE_STRING
+      json_name: "name"
+    }
+    field {
+      name: "rx_bytes"
+      number: 2
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "rxBytes"
+    }
+    field {
+      name: "rx_packets"
+      number: 3
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "rxPackets"
+    }
+    field {
+      name: "rx_errors"
+      number: 4
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "rxErrors"
+    }
+    field {
+      name: "rx_dropped"
+      number: 5
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "rxDropped"
+    }
+    field {
+      name: "tx_bytes"
+      number: 6
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "txBytes"
+    }
+    field {
+      name: "tx_packets"
+      number: 7
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "txPackets"
+    }
+    field {
+      name: "tx_errors"
+      number: 8
+      label: LABEL_OPTIONAL
+      type: TYPE_UINT64
+      json_name: "txErrors"
+    }
+    field {
+      name: "tx_dropped"
+      number: 9
+      label: LABEL_OPTIONAL
       type: TYPE_UINT64
-      json_name: "hca_objects"
+      json_name: "txDropped"
     }
   }
   syntax: "proto3"
diff --git a/vendor/github.com/containerd/cgroups/metrics.proto b/vendor/github.com/containerd/cgroups/metrics.proto
index 642623fce..62b519806 100644
--- a/vendor/github.com/containerd/cgroups/metrics.proto
+++ b/vendor/github.com/containerd/cgroups/metrics.proto
@@ -11,6 +11,7 @@ message Metrics {
 	MemoryStat memory = 4;
 	BlkIOStat blkio = 5;
 	RdmaStat rdma = 6;
+	repeated NetworkStat network = 7;
 }
 
 message HugetlbStat {
@@ -121,3 +122,15 @@ message RdmaEntry {
 	uint32 hca_handles = 2;
 	uint32 hca_objects = 3;
 }
+
+message NetworkStat {
+	string name = 1;
+	uint64 rx_bytes = 2;
+	uint64 rx_packets = 3;
+	uint64 rx_errors  = 4;
+	uint64 rx_dropped = 5;
+	uint64 tx_bytes = 6;
+	uint64 tx_packets = 7;
+	uint64 tx_errors = 8;
+	uint64 tx_dropped = 9;
+}
diff --git a/vendor/github.com/containerd/cgroups/utils.go b/vendor/github.com/containerd/cgroups/utils.go
index f3129b1a3..8a97d04dd 100644
--- a/vendor/github.com/containerd/cgroups/utils.go
+++ b/vendor/github.com/containerd/cgroups/utils.go
@@ -168,7 +168,7 @@ func readTasksPids(path string, subsystem Name) ([]Task, error) {
 func hugePageSizes() ([]string, error) {
 	var (
 		pageSizes []string
-		sizeList  = []string{"B", "kB", "MB", "GB", "TB", "PB"}
+		sizeList  = []string{"B", "KB", "MB", "GB", "TB", "PB"}
 	)
 	files, err := ioutil.ReadDir("/sys/kernel/mm/hugepages")
 	if err != nil {
diff --git a/vendor/github.com/containernetworking/cni/libcni/api.go b/vendor/github.com/containernetworking/cni/libcni/api.go
index 360733e74..0f14d3427 100644
--- a/vendor/github.com/containernetworking/cni/libcni/api.go
+++ b/vendor/github.com/containernetworking/cni/libcni/api.go
@@ -69,6 +69,7 @@ type CNI interface {
 	AddNetworkList(ctx context.Context, net *NetworkConfigList, rt *RuntimeConf) (types.Result, error)
 	CheckNetworkList(ctx context.Context, net *NetworkConfigList, rt *RuntimeConf) error
 	DelNetworkList(ctx context.Context, net *NetworkConfigList, rt *RuntimeConf) error
+	GetNetworkListCachedResult(net *NetworkConfigList, rt *RuntimeConf) (types.Result, error)
 
 	AddNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
 	CheckNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) error
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/args.go b/vendor/github.com/containernetworking/cni/pkg/invoke/args.go
index 39b639723..913528c1d 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/args.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/args.go
@@ -15,6 +15,7 @@
 package invoke
 
 import (
+	"fmt"
 	"os"
 	"strings"
 )
@@ -22,6 +23,8 @@ import (
 type CNIArgs interface {
 	// For use with os/exec; i.e., return nil to inherit the
 	// environment from this process
+	// For use in delegation; inherit the environment from this
+	// process and allow overrides
 	AsEnv() []string
 }
 
@@ -57,17 +60,17 @@ func (args *Args) AsEnv() []string {
 		pluginArgsStr = stringify(args.PluginArgs)
 	}
 
-	// Ensure that the custom values are first, so any value present in
-	// the process environment won't override them.
-	env = append([]string{
-		"CNI_COMMAND=" + args.Command,
-		"CNI_CONTAINERID=" + args.ContainerID,
-		"CNI_NETNS=" + args.NetNS,
-		"CNI_ARGS=" + pluginArgsStr,
-		"CNI_IFNAME=" + args.IfName,
-		"CNI_PATH=" + args.Path,
-	}, env...)
-	return env
+	// Duplicated values which come first will be overrided, so we must put the
+	// custom values in the end to avoid being overrided by the process environments.
+	env = append(env,
+		"CNI_COMMAND="+args.Command,
+		"CNI_CONTAINERID="+args.ContainerID,
+		"CNI_NETNS="+args.NetNS,
+		"CNI_ARGS="+pluginArgsStr,
+		"CNI_IFNAME="+args.IfName,
+		"CNI_PATH="+args.Path,
+	)
+	return dedupEnv(env)
 }
 
 // taken from rkt/networking/net_plugin.go
@@ -80,3 +83,46 @@ func stringify(pluginArgs [][2]string) string {
 
 	return strings.Join(entries, ";")
 }
+
+// DelegateArgs implements the CNIArgs interface
+// used for delegation to inherit from environments
+// and allow some overrides like CNI_COMMAND
+var _ CNIArgs = &DelegateArgs{}
+
+type DelegateArgs struct {
+	Command string
+}
+
+func (d *DelegateArgs) AsEnv() []string {
+	env := os.Environ()
+
+	// The custom values should come in the end to override the existing
+	// process environment of the same key.
+	env = append(env,
+		"CNI_COMMAND="+d.Command,
+	)
+	return dedupEnv(env)
+}
+
+// dedupEnv returns a copy of env with any duplicates removed, in favor of later values.
+// Items not of the normal environment "key=value" form are preserved unchanged.
+func dedupEnv(env []string) []string {
+	out := make([]string, 0, len(env))
+	envMap := map[string]string{}
+
+	for _, kv := range env {
+		// find the first "=" in environment, if not, just keep it
+		eq := strings.Index(kv, "=")
+		if eq < 0 {
+			out = append(out, kv)
+			continue
+		}
+		envMap[kv[:eq]] = kv[eq+1:]
+	}
+
+	for k, v := range envMap {
+		out = append(out, fmt.Sprintf("%s=%s", k, v))
+	}
+
+	return out
+}
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go b/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
index 30b4672f1..8defe4dd3 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
@@ -16,22 +16,17 @@ package invoke
 
 import (
 	"context"
-	"fmt"
 	"os"
 	"path/filepath"
 
 	"github.com/containernetworking/cni/pkg/types"
 )
 
-func delegateCommon(expectedCommand, delegatePlugin string, exec Exec) (string, Exec, error) {
+func delegateCommon(delegatePlugin string, exec Exec) (string, Exec, error) {
 	if exec == nil {
 		exec = defaultExec
 	}
 
-	if os.Getenv("CNI_COMMAND") != expectedCommand {
-		return "", nil, fmt.Errorf("CNI_COMMAND is not " + expectedCommand)
-	}
-
 	paths := filepath.SplitList(os.Getenv("CNI_PATH"))
 	pluginPath, err := exec.FindInPath(delegatePlugin, paths)
 	if err != nil {
@@ -44,32 +39,42 @@ func delegateCommon(expectedCommand, delegatePlugin string, exec Exec) (string,
 // DelegateAdd calls the given delegate plugin with the CNI ADD action and
 // JSON configuration
 func DelegateAdd(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
-	pluginPath, realExec, err := delegateCommon("ADD", delegatePlugin, exec)
+	pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
 	if err != nil {
 		return nil, err
 	}
 
-	return ExecPluginWithResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
+	// DelegateAdd will override the original "CNI_COMMAND" env from process with ADD
+	return ExecPluginWithResult(ctx, pluginPath, netconf, delegateArgs("ADD"), realExec)
 }
 
 // DelegateCheck calls the given delegate plugin with the CNI CHECK action and
 // JSON configuration
 func DelegateCheck(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
-	pluginPath, realExec, err := delegateCommon("CHECK", delegatePlugin, exec)
+	pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
 	if err != nil {
 		return err
 	}
 
-	return ExecPluginWithoutResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
+	// DelegateCheck will override the original CNI_COMMAND env from process with CHECK
+	return ExecPluginWithoutResult(ctx, pluginPath, netconf, delegateArgs("CHECK"), realExec)
 }
 
 // DelegateDel calls the given delegate plugin with the CNI DEL action and
 // JSON configuration
 func DelegateDel(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
-	pluginPath, realExec, err := delegateCommon("DEL", delegatePlugin, exec)
+	pluginPath, realExec, err := delegateCommon(delegatePlugin, exec)
 	if err != nil {
 		return err
 	}
 
-	return ExecPluginWithoutResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
+	// DelegateDel will override the original CNI_COMMAND env from process with DEL
+	return ExecPluginWithoutResult(ctx, pluginPath, netconf, delegateArgs("DEL"), realExec)
+}
+
+// return CNIArgs used by delegation
+func delegateArgs(action string) *DelegateArgs {
+	return &DelegateArgs{
+		Command: action,
+	}
 }
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go b/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go
index e5b86634d..ad8498ba2 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go
@@ -46,7 +46,9 @@ func (e *RawExec) ExecPlugin(ctx context.Context, pluginPath string, stdinData [
 func pluginErr(err error, output []byte) error {
 	if _, ok := err.(*exec.ExitError); ok {
 		emsg := types.Error{}
-		if perr := json.Unmarshal(output, &emsg); perr != nil {
+		if len(output) == 0 {
+			emsg.Msg = "netplugin failed with no error message"
+		} else if perr := json.Unmarshal(output, &emsg); perr != nil {
 			emsg.Msg = fmt.Sprintf("netplugin failed but error parsing its diagnostic message %q: %v", string(output), perr)
 		}
 		return &emsg
diff --git a/vendor/github.com/containernetworking/plugins/pkg/ns/README.md b/vendor/github.com/containernetworking/plugins/pkg/ns/README.md
index c0f5cf2e8..1e265c7a0 100644
--- a/vendor/github.com/containernetworking/plugins/pkg/ns/README.md
+++ b/vendor/github.com/containernetworking/plugins/pkg/ns/README.md
@@ -12,10 +12,6 @@ For example, you cannot rely on the `ns.Set()` namespace being the current names
 The `ns.Do()` method provides **partial** control over network namespaces for you by implementing these strategies. All code dependent on a particular network namespace (including the root namespace) should be wrapped in the `ns.Do()` method to ensure the correct namespace is selected for the duration of your code.  For example:
 
 ```go
-targetNs, err := ns.NewNS()
-if err != nil {
-    return err
-}
 err = targetNs.Do(func(hostNs ns.NetNS) error {
 	dummy := &netlink.Dummy{
 		LinkAttrs: netlink.LinkAttrs{
@@ -26,11 +22,16 @@ err = targetNs.Do(func(hostNs ns.NetNS) error {
 })
 ```
 
-Note this requirement to wrap every network call is very onerous - any libraries you call might call out to network services such as DNS, and all such calls need to be protected after you call `ns.Do()`. The CNI plugins all exit very soon after calling `ns.Do()` which helps to minimize the problem.
+Note this requirement to wrap every network call is very onerous - any libraries you call might call out to network services such as DNS, and all such calls need to be protected after you call `ns.Do()`. All goroutines spawned from within the `ns.Do` will not inherit the new namespace. The CNI plugins all exit very soon after calling `ns.Do()` which helps to minimize the problem.
 
-Also:  If the runtime spawns a new OS thread, it will inherit the network namespace of the parent thread, which may have been temporarily switched, and thus the new OS thread will be permanently "stuck in the wrong namespace".
+When a new thread is spawned in Linux, it inherits the namespace of its parent. In versions of go **prior to 1.10**, if the runtime spawns a new OS thread, it picks the parent randomly. If the chosen parent thread has been moved to a new namespace (even temporarily), the new OS thread will be permanently "stuck in the wrong namespace", and goroutines will non-deterministically switch namespaces as they are rescheduled.
+
+In short, **there was no safe way to change network namespaces, even temporarily, from within a long-lived, multithreaded Go process**. If you wish to do this, you must use go 1.10 or greater. 
+
+
+### Creating network namespaces
+Earlier versions of this library managed namespace creation, but as CNI does not actually utilize this feature (and it was essentially unmaintained), it was removed. If you're writing a container runtime, you should implement namespace management yourself. However, there are some gotchas when doing so, especially around handling `/var/run/netns`. A reasonably correct reference implementation, borrowed from `rkt`, can be found in `pkg/testutils/netns_linux.go` if you're in need of a source of inspiration.
 
-In short, **there is no safe way to change network namespaces from within a long-lived, multithreaded Go process**.  If your daemon process needs to be namespace aware, consider spawning a separate process (like a CNI plugin) for each namespace.
 
 ### Further Reading
  - https://github.com/golang/go/wiki/LockOSThread
diff --git a/vendor/github.com/containernetworking/plugins/pkg/ns/ns_linux.go b/vendor/github.com/containernetworking/plugins/pkg/ns/ns_linux.go
index 4ce989467..31ad5f622 100644
--- a/vendor/github.com/containernetworking/plugins/pkg/ns/ns_linux.go
+++ b/vendor/github.com/containernetworking/plugins/pkg/ns/ns_linux.go
@@ -15,10 +15,8 @@
 package ns
 
 import (
-	"crypto/rand"
 	"fmt"
 	"os"
-	"path"
 	"runtime"
 	"sync"
 	"syscall"
@@ -38,82 +36,6 @@ func getCurrentThreadNetNSPath() string {
 	return fmt.Sprintf("/proc/%d/task/%d/ns/net", os.Getpid(), unix.Gettid())
 }
 
-// Creates a new persistent network namespace and returns an object
-// representing that namespace, without switching to it
-func NewNS() (NetNS, error) {
-	const nsRunDir = "/var/run/netns"
-
-	b := make([]byte, 16)
-	_, err := rand.Reader.Read(b)
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate random netns name: %v", err)
-	}
-
-	err = os.MkdirAll(nsRunDir, 0755)
-	if err != nil {
-		return nil, err
-	}
-
-	// create an empty file at the mount point
-	nsName := fmt.Sprintf("cni-%x-%x-%x-%x-%x", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
-	nsPath := path.Join(nsRunDir, nsName)
-	mountPointFd, err := os.Create(nsPath)
-	if err != nil {
-		return nil, err
-	}
-	mountPointFd.Close()
-
-	// Ensure the mount point is cleaned up on errors; if the namespace
-	// was successfully mounted this will have no effect because the file
-	// is in-use
-	defer os.RemoveAll(nsPath)
-
-	var wg sync.WaitGroup
-	wg.Add(1)
-
-	// do namespace work in a dedicated goroutine, so that we can safely
-	// Lock/Unlock OSThread without upsetting the lock/unlock state of
-	// the caller of this function
-	var fd *os.File
-	go (func() {
-		defer wg.Done()
-		runtime.LockOSThread()
-
-		var origNS NetNS
-		origNS, err = GetNS(getCurrentThreadNetNSPath())
-		if err != nil {
-			return
-		}
-		defer origNS.Close()
-
-		// create a new netns on the current thread
-		err = unix.Unshare(unix.CLONE_NEWNET)
-		if err != nil {
-			return
-		}
-		defer origNS.Set()
-
-		// bind mount the new netns from the current thread onto the mount point
-		err = unix.Mount(getCurrentThreadNetNSPath(), nsPath, "none", unix.MS_BIND, "")
-		if err != nil {
-			return
-		}
-
-		fd, err = os.Open(nsPath)
-		if err != nil {
-			return
-		}
-	})()
-	wg.Wait()
-
-	if err != nil {
-		unix.Unmount(nsPath, unix.MNT_DETACH)
-		return nil, fmt.Errorf("failed to create namespace: %v", err)
-	}
-
-	return &netNS{file: fd, mounted: true}, nil
-}
-
 func (ns *netNS) Close() error {
 	if err := ns.errorIfClosed(); err != nil {
 		return err
@@ -124,16 +46,6 @@ func (ns *netNS) Close() error {
 	}
 	ns.closed = true
 
-	if ns.mounted {
-		if err := unix.Unmount(ns.file.Name(), unix.MNT_DETACH); err != nil {
-			return fmt.Errorf("Failed to unmount namespace %s: %v", ns.file.Name(), err)
-		}
-		if err := os.RemoveAll(ns.file.Name()); err != nil {
-			return fmt.Errorf("Failed to clean up namespace %s: %v", ns.file.Name(), err)
-		}
-		ns.mounted = false
-	}
-
 	return nil
 }
 
@@ -180,9 +92,8 @@ type NetNS interface {
 }
 
 type netNS struct {
-	file    *os.File
-	mounted bool
-	closed  bool
+	file   *os.File
+	closed bool
 }
 
 // netNS implements the NetNS interface
diff --git a/vendor/github.com/containers/storage/VERSION b/vendor/github.com/containers/storage/VERSION
index e6e1ff3ac..656fd0d7e 100644
--- a/vendor/github.com/containers/storage/VERSION
+++ b/vendor/github.com/containers/storage/VERSION
@@ -1 +1 @@
-1.12.11
+1.12.12
diff --git a/vendor/github.com/containers/storage/utils.go b/vendor/github.com/containers/storage/utils.go
index fafaaab5e..54627731a 100644
--- a/vendor/github.com/containers/storage/utils.go
+++ b/vendor/github.com/containers/storage/utils.go
@@ -195,17 +195,17 @@ func DefaultStoreOptions(rootless bool, rootlessUid int) (StoreOptions, error) {
 	if err != nil {
 		return storageOpts, err
 	}
-	if _, err = os.Stat(storageConf); err == nil {
+	_, err = os.Stat(storageConf)
+	if err != nil && !os.IsNotExist(err) {
+		return storageOpts, errors.Wrapf(err, "cannot stat %s", storageConf)
+	}
+	if err == nil {
 		defaultRootlessRunRoot = storageOpts.RunRoot
 		defaultRootlessGraphRoot = storageOpts.GraphRoot
 		storageOpts = StoreOptions{}
 		ReloadConfigurationFile(storageConf, &storageOpts)
 	}
 
-	if !os.IsNotExist(err) {
-		return storageOpts, errors.Wrapf(err, "cannot stat %s", storageConf)
-	}
-
 	if rootless && rootlessUid != 0 {
 		if err == nil {
 			// If the file did not specify a graphroot or runroot,
diff --git a/vendor/github.com/coreos/go-iptables/iptables/iptables.go b/vendor/github.com/coreos/go-iptables/iptables/iptables.go
index 8db2597a4..9601bc78a 100644
--- a/vendor/github.com/coreos/go-iptables/iptables/iptables.go
+++ b/vendor/github.com/coreos/go-iptables/iptables/iptables.go
@@ -31,6 +31,7 @@ type Error struct {
 	exec.ExitError
 	cmd        exec.Cmd
 	msg        string
+	proto      Protocol
 	exitStatus *int //for overriding
 }
 
@@ -48,8 +49,8 @@ func (e *Error) Error() string {
 // IsNotExist returns true if the error is due to the chain or rule not existing
 func (e *Error) IsNotExist() bool {
 	return e.ExitStatus() == 1 &&
-		(e.msg == "iptables: Bad rule (does a matching rule exist in that chain?).\n" ||
-			e.msg == "iptables: No chain/target/match by that name.\n")
+		(e.msg == fmt.Sprintf("%s: Bad rule (does a matching rule exist in that chain?).\n", getIptablesCommand(e.proto)) ||
+			e.msg == fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(e.proto)))
 }
 
 // Protocol to differentiate between IPv4 and IPv6
@@ -282,7 +283,8 @@ func (ipt *IPTables) executeList(args []string) ([]string, error) {
 		v := 1
 		return nil, &Error{
 			cmd:        exec.Cmd{Args: args},
-			msg:        "iptables: No chain/target/match by that name.",
+			msg:        fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(ipt.proto)),
+			proto:      ipt.proto,
 			exitStatus: &v,
 		}
 	}
@@ -385,7 +387,7 @@ func (ipt *IPTables) runWithOutput(args []string, stdout io.Writer) error {
 	if err := cmd.Run(); err != nil {
 		switch e := err.(type) {
 		case *exec.ExitError:
-			return &Error{*e, cmd, stderr.String(), nil}
+			return &Error{*e, cmd, stderr.String(), ipt.proto, nil}
 		default:
 			return err
 		}
diff --git a/vendor/github.com/coreos/go-systemd/dbus/dbus.go b/vendor/github.com/coreos/go-systemd/dbus/dbus.go
index 1d54810af..f652582e6 100644
--- a/vendor/github.com/coreos/go-systemd/dbus/dbus.go
+++ b/vendor/github.com/coreos/go-systemd/dbus/dbus.go
@@ -143,7 +143,7 @@ func NewUserConnection() (*Conn, error) {
 func NewSystemdConnection() (*Conn, error) {
 	return NewConnection(func() (*dbus.Conn, error) {
 		// We skip Hello when talking directly to systemd.
-		return dbusAuthConnection(func() (*dbus.Conn, error) {
+		return dbusAuthConnection(func(opts ...dbus.ConnOption) (*dbus.Conn, error) {
 			return dbus.Dial("unix:path=/run/systemd/private")
 		})
 	})
@@ -201,7 +201,7 @@ func (c *Conn) GetManagerProperty(prop string) (string, error) {
 	return variant.String(), nil
 }
 
-func dbusAuthConnection(createBus func() (*dbus.Conn, error)) (*dbus.Conn, error) {
+func dbusAuthConnection(createBus func(opts ...dbus.ConnOption) (*dbus.Conn, error)) (*dbus.Conn, error) {
 	conn, err := createBus()
 	if err != nil {
 		return nil, err
@@ -221,7 +221,7 @@ func dbusAuthConnection(createBus func() (*dbus.Conn, error)) (*dbus.Conn, error
 	return conn, nil
 }
 
-func dbusAuthHelloConnection(createBus func() (*dbus.Conn, error)) (*dbus.Conn, error) {
+func dbusAuthHelloConnection(createBus func(opts ...dbus.ConnOption) (*dbus.Conn, error)) (*dbus.Conn, error) {
 	conn, err := dbusAuthConnection(createBus)
 	if err != nil {
 		return nil, err
diff --git a/vendor/github.com/coreos/go-systemd/dbus/methods.go b/vendor/github.com/coreos/go-systemd/dbus/methods.go
index 0b4207229..5859583eb 100644
--- a/vendor/github.com/coreos/go-systemd/dbus/methods.go
+++ b/vendor/github.com/coreos/go-systemd/dbus/methods.go
@@ -117,13 +117,13 @@ func (c *Conn) TryRestartUnit(name string, mode string, ch chan<- string) (int,
 	return c.startJob(ch, "org.freedesktop.systemd1.Manager.TryRestartUnit", name, mode)
 }
 
-// ReloadOrRestart attempts a reload if the unit supports it and use a restart
+// ReloadOrRestartUnit attempts a reload if the unit supports it and use a restart
 // otherwise.
 func (c *Conn) ReloadOrRestartUnit(name string, mode string, ch chan<- string) (int, error) {
 	return c.startJob(ch, "org.freedesktop.systemd1.Manager.ReloadOrRestartUnit", name, mode)
 }
 
-// ReloadOrTryRestart attempts a reload if the unit supports it and use a "Try"
+// ReloadOrTryRestartUnit attempts a reload if the unit supports it and use a "Try"
 // flavored restart otherwise.
 func (c *Conn) ReloadOrTryRestartUnit(name string, mode string, ch chan<- string) (int, error) {
 	return c.startJob(ch, "org.freedesktop.systemd1.Manager.ReloadOrTryRestartUnit", name, mode)
@@ -192,11 +192,17 @@ func (c *Conn) GetUnitProperties(unit string) (map[string]interface{}, error) {
 	return c.getProperties(path, "org.freedesktop.systemd1.Unit")
 }
 
-// GetUnitProperties takes the (escaped) unit path and returns all of its dbus object properties.
+// GetUnitPathProperties takes the (escaped) unit path and returns all of its dbus object properties.
 func (c *Conn) GetUnitPathProperties(path dbus.ObjectPath) (map[string]interface{}, error) {
 	return c.getProperties(path, "org.freedesktop.systemd1.Unit")
 }
 
+// GetAllProperties takes the (unescaped) unit name and returns all of its dbus object properties.
+func (c *Conn) GetAllProperties(unit string) (map[string]interface{}, error) {
+	path := unitPath(unit)
+	return c.getProperties(path, "")
+}
+
 func (c *Conn) getProperty(unit string, dbusInterface string, propertyName string) (*Property, error) {
 	var err error
 	var prop dbus.Variant
@@ -291,6 +297,8 @@ func (c *Conn) listUnitsInternal(f storeFunc) ([]UnitStatus, error) {
 // ListUnits returns an array with all currently loaded units. Note that
 // units may be known by multiple names at the same time, and hence there might
 // be more unit names loaded than actual units behind them.
+// Also note that a unit is only loaded if it is active and/or enabled.
+// Units that are both disabled and inactive will thus not be returned.
 func (c *Conn) ListUnits() ([]UnitStatus, error) {
 	return c.listUnitsInternal(c.sysobj.Call("org.freedesktop.systemd1.Manager.ListUnits", 0).Store)
 }
diff --git a/vendor/github.com/coreos/go-systemd/dbus/subscription.go b/vendor/github.com/coreos/go-systemd/dbus/subscription.go
index 70e63a6f1..f6d7a08a1 100644
--- a/vendor/github.com/coreos/go-systemd/dbus/subscription.go
+++ b/vendor/github.com/coreos/go-systemd/dbus/subscription.go
@@ -94,7 +94,7 @@ func (c *Conn) dispatch() {
 	}()
 }
 
-// Returns two unbuffered channels which will receive all changed units every
+// SubscribeUnits returns two unbuffered channels which will receive all changed units every
 // interval.  Deleted units are sent as nil.
 func (c *Conn) SubscribeUnits(interval time.Duration) (<-chan map[string]*UnitStatus, <-chan error) {
 	return c.SubscribeUnitsCustom(interval, 0, func(u1, u2 *UnitStatus) bool { return *u1 != *u2 }, nil)
diff --git a/vendor/github.com/coreos/go-systemd/journal/journal.go b/vendor/github.com/coreos/go-systemd/journal/journal.go
index ef85a3ba2..a0f4837a0 100644
--- a/vendor/github.com/coreos/go-systemd/journal/journal.go
+++ b/vendor/github.com/coreos/go-systemd/journal/journal.go
@@ -33,7 +33,10 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"sync"
+	"sync/atomic"
 	"syscall"
+	"unsafe"
 )
 
 // Priority of a journal message
@@ -50,19 +53,35 @@ const (
 	PriDebug
 )
 
-var conn net.Conn
+var (
+	// This can be overridden at build-time:
+	// https://github.com/golang/go/wiki/GcToolchainTricks#including-build-information-in-the-executable
+	journalSocket = "/run/systemd/journal/socket"
+
+	// unixConnPtr atomically holds the local unconnected Unix-domain socket.
+	// Concrete safe pointer type: *net.UnixConn
+	unixConnPtr unsafe.Pointer
+	// onceConn ensures that unixConnPtr is initialized exactly once.
+	onceConn sync.Once
+)
 
 func init() {
-	var err error
-	conn, err = net.Dial("unixgram", "/run/systemd/journal/socket")
-	if err != nil {
-		conn = nil
-	}
+	onceConn.Do(initConn)
 }
 
-// Enabled returns true if the local systemd journal is available for logging
+// Enabled checks whether the local systemd journal is available for logging.
 func Enabled() bool {
-	return conn != nil
+	onceConn.Do(initConn)
+
+	if (*net.UnixConn)(atomic.LoadPointer(&unixConnPtr)) == nil {
+		return false
+	}
+
+	if _, err := net.Dial("unixgram", journalSocket); err != nil {
+		return false
+	}
+
+	return true
 }
 
 // Send a message to the local systemd journal. vars is a map of journald
@@ -73,8 +92,14 @@ func Enabled() bool {
 // (http://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html)
 // for more details.  vars may be nil.
 func Send(message string, priority Priority, vars map[string]string) error {
+	conn := (*net.UnixConn)(atomic.LoadPointer(&unixConnPtr))
 	if conn == nil {
-		return journalError("could not connect to journald socket")
+		return errors.New("could not initialize socket to journald")
+	}
+
+	socketAddr := &net.UnixAddr{
+		Name: journalSocket,
+		Net:  "unixgram",
 	}
 
 	data := new(bytes.Buffer)
@@ -84,32 +109,30 @@ func Send(message string, priority Priority, vars map[string]string) error {
 		appendVariable(data, k, v)
 	}
 
-	_, err := io.Copy(conn, data)
-	if err != nil && isSocketSpaceError(err) {
-		file, err := tempFd()
-		if err != nil {
-			return journalError(err.Error())
-		}
-		defer file.Close()
-		_, err = io.Copy(file, data)
-		if err != nil {
-			return journalError(err.Error())
-		}
-
-		rights := syscall.UnixRights(int(file.Fd()))
+	_, _, err := conn.WriteMsgUnix(data.Bytes(), nil, socketAddr)
+	if err == nil {
+		return nil
+	}
+	if !isSocketSpaceError(err) {
+		return err
+	}
 
-		/* this connection should always be a UnixConn, but better safe than sorry */
-		unixConn, ok := conn.(*net.UnixConn)
-		if !ok {
-			return journalError("can't send file through non-Unix connection")
-		}
-		_, _, err = unixConn.WriteMsgUnix([]byte{}, rights, nil)
-		if err != nil {
-			return journalError(err.Error())
-		}
-	} else if err != nil {
-		return journalError(err.Error())
+	// Large log entry, send it via tempfile and ancillary-fd.
+	file, err := tempFd()
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	_, err = io.Copy(file, data)
+	if err != nil {
+		return err
 	}
+	rights := syscall.UnixRights(int(file.Fd()))
+	_, _, err = conn.WriteMsgUnix([]byte{}, rights, socketAddr)
+	if err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -119,8 +142,8 @@ func Print(priority Priority, format string, a ...interface{}) error {
 }
 
 func appendVariable(w io.Writer, name, value string) {
-	if !validVarName(name) {
-		journalError("variable name contains invalid character, ignoring")
+	if err := validVarName(name); err != nil {
+		fmt.Fprintf(os.Stderr, "variable name %s contains invalid character, ignoring\n", name)
 	}
 	if strings.ContainsRune(value, '\n') {
 		/* When the value contains a newline, we write:
@@ -137,32 +160,42 @@ func appendVariable(w io.Writer, name, value string) {
 	}
 }
 
-func validVarName(name string) bool {
-	/* The variable name must be in uppercase and consist only of characters,
-	 * numbers and underscores, and may not begin with an underscore. (from the docs)
-	 */
+// validVarName validates a variable name to make sure journald will accept it.
+// The variable name must be in uppercase and consist only of characters,
+// numbers and underscores, and may not begin with an underscore:
+// https://www.freedesktop.org/software/systemd/man/sd_journal_print.html
+func validVarName(name string) error {
+	if name == "" {
+		return errors.New("Empty variable name")
+	} else if name[0] == '_' {
+		return errors.New("Variable name begins with an underscore")
+	}
 
-	valid := name[0] != '_'
 	for _, c := range name {
-		valid = valid && ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_'
+		if !(('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_') {
+			return errors.New("Variable name contains invalid characters")
+		}
 	}
-	return valid
+	return nil
 }
 
+// isSocketSpaceError checks whether the error is signaling
+// an "overlarge message" condition.
 func isSocketSpaceError(err error) bool {
 	opErr, ok := err.(*net.OpError)
-	if !ok {
+	if !ok || opErr == nil {
 		return false
 	}
 
-	sysErr, ok := opErr.Err.(syscall.Errno)
-	if !ok {
+	sysErr, ok := opErr.Err.(*os.SyscallError)
+	if !ok || sysErr == nil {
 		return false
 	}
 
-	return sysErr == syscall.EMSGSIZE || sysErr == syscall.ENOBUFS
+	return sysErr.Err == syscall.EMSGSIZE || sysErr.Err == syscall.ENOBUFS
 }
 
+// tempFd creates a temporary, unlinked file under `/dev/shm`.
 func tempFd() (*os.File, error) {
 	file, err := ioutil.TempFile("/dev/shm/", "journal.XXXXX")
 	if err != nil {
@@ -175,8 +208,18 @@ func tempFd() (*os.File, error) {
 	return file, nil
 }
 
-func journalError(s string) error {
-	s = "journal error: " + s
-	fmt.Fprintln(os.Stderr, s)
-	return errors.New(s)
+// initConn initializes the global `unixConnPtr` socket.
+// It is meant to be called exactly once, at program startup.
+func initConn() {
+	autobind, err := net.ResolveUnixAddr("unixgram", "")
+	if err != nil {
+		return
+	}
+
+	sock, err := net.ListenUnixgram("unixgram", autobind)
+	if err != nil {
+		return
+	}
+
+	atomic.StorePointer(&unixConnPtr, unsafe.Pointer(sock))
 }
diff --git a/vendor/github.com/coreos/go-systemd/sdjournal/journal.go b/vendor/github.com/coreos/go-systemd/sdjournal/journal.go
index 9f3d92342..7f840def8 100644
--- a/vendor/github.com/coreos/go-systemd/sdjournal/journal.go
+++ b/vendor/github.com/coreos/go-systemd/sdjournal/journal.go
@@ -414,7 +414,7 @@ func NewJournal() (j *Journal, err error) {
 	r := C.my_sd_journal_open(sd_journal_open, &j.cjournal, C.SD_JOURNAL_LOCAL_ONLY)
 
 	if r < 0 {
-		return nil, fmt.Errorf("failed to open journal: %d", syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to open journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return j, nil
@@ -435,7 +435,7 @@ func NewJournalFromDir(path string) (j *Journal, err error) {
 
 	r := C.my_sd_journal_open_directory(sd_journal_open_directory, &j.cjournal, p, 0)
 	if r < 0 {
-		return nil, fmt.Errorf("failed to open journal in directory %q: %d", path, syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to open journal in directory %q: %s", path, syscall.Errno(-r).Error())
 	}
 
 	return j, nil
@@ -461,7 +461,7 @@ func NewJournalFromFiles(paths ...string) (j *Journal, err error) {
 
 	r := C.my_sd_journal_open_files(sd_journal_open_files, &j.cjournal, &cPaths[0], 0)
 	if r < 0 {
-		return nil, fmt.Errorf("failed to open journals in paths %q: %d", paths, syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to open journals in paths %q: %s", paths, syscall.Errno(-r).Error())
 	}
 
 	return j, nil
@@ -496,7 +496,7 @@ func (j *Journal) AddMatch(match string) error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to add match: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to add match: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -514,7 +514,7 @@ func (j *Journal) AddDisjunction() error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to add a disjunction in the match list: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to add a disjunction in the match list: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -532,7 +532,7 @@ func (j *Journal) AddConjunction() error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to add a conjunction in the match list: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to add a conjunction in the match list: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -562,7 +562,7 @@ func (j *Journal) Next() (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to iterate journal: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to iterate journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(r), nil
@@ -581,7 +581,7 @@ func (j *Journal) NextSkip(skip uint64) (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to iterate journal: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to iterate journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(r), nil
@@ -599,7 +599,7 @@ func (j *Journal) Previous() (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to iterate journal: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to iterate journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(r), nil
@@ -618,7 +618,7 @@ func (j *Journal) PreviousSkip(skip uint64) (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to iterate journal: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to iterate journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(r), nil
@@ -641,7 +641,7 @@ func (j *Journal) getData(field string) (unsafe.Pointer, C.int, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return nil, 0, fmt.Errorf("failed to read message: %d", syscall.Errno(-r))
+		return nil, 0, fmt.Errorf("failed to read message: %s", syscall.Errno(-r).Error())
 	}
 
 	return d, C.int(l), nil
@@ -736,7 +736,7 @@ func (j *Journal) GetEntry() (*JournalEntry, error) {
 	var realtimeUsec C.uint64_t
 	r = C.my_sd_journal_get_realtime_usec(sd_journal_get_realtime_usec, j.cjournal, &realtimeUsec)
 	if r < 0 {
-		return nil, fmt.Errorf("failed to get realtime timestamp: %d", syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to get realtime timestamp: %s", syscall.Errno(-r).Error())
 	}
 
 	entry.RealtimeTimestamp = uint64(realtimeUsec)
@@ -746,7 +746,7 @@ func (j *Journal) GetEntry() (*JournalEntry, error) {
 
 	r = C.my_sd_journal_get_monotonic_usec(sd_journal_get_monotonic_usec, j.cjournal, &monotonicUsec, &boot_id)
 	if r < 0 {
-		return nil, fmt.Errorf("failed to get monotonic timestamp: %d", syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to get monotonic timestamp: %s", syscall.Errno(-r).Error())
 	}
 
 	entry.MonotonicTimestamp = uint64(monotonicUsec)
@@ -757,7 +757,7 @@ func (j *Journal) GetEntry() (*JournalEntry, error) {
 	r = C.my_sd_journal_get_cursor(sd_journal_get_cursor, j.cjournal, &c)
 	defer C.free(unsafe.Pointer(c))
 	if r < 0 {
-		return nil, fmt.Errorf("failed to get cursor: %d", syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to get cursor: %s", syscall.Errno(-r).Error())
 	}
 
 	entry.Cursor = C.GoString(c)
@@ -773,7 +773,7 @@ func (j *Journal) GetEntry() (*JournalEntry, error) {
 		}
 
 		if r < 0 {
-			return nil, fmt.Errorf("failed to read message field: %d", syscall.Errno(-r))
+			return nil, fmt.Errorf("failed to read message field: %s", syscall.Errno(-r).Error())
 		}
 
 		msg := C.GoStringN((*C.char)(d), C.int(l))
@@ -803,7 +803,7 @@ func (j *Journal) SetDataThreshold(threshold uint64) error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to set data threshold: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to set data threshold: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -826,7 +826,7 @@ func (j *Journal) GetRealtimeUsec() (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to get realtime timestamp: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to get realtime timestamp: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(usec), nil
@@ -850,7 +850,7 @@ func (j *Journal) GetMonotonicUsec() (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to get monotonic timestamp: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to get monotonic timestamp: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(usec), nil
@@ -875,7 +875,7 @@ func (j *Journal) GetCursor() (string, error) {
 	defer C.free(unsafe.Pointer(d))
 
 	if r < 0 {
-		return "", fmt.Errorf("failed to get cursor: %d", syscall.Errno(-r))
+		return "", fmt.Errorf("failed to get cursor: %s", syscall.Errno(-r).Error())
 	}
 
 	cursor := C.GoString(d)
@@ -899,7 +899,7 @@ func (j *Journal) TestCursor(cursor string) error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to test to cursor %q: %d", cursor, syscall.Errno(-r))
+		return fmt.Errorf("failed to test to cursor %q: %s", cursor, syscall.Errno(-r).Error())
 	} else if r == 0 {
 		return ErrNoTestCursor
 	}
@@ -921,7 +921,7 @@ func (j *Journal) SeekHead() error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to seek to head of journal: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to seek to head of journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -941,7 +941,7 @@ func (j *Journal) SeekTail() error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to seek to tail of journal: %d", syscall.Errno(-r))
+		return fmt.Errorf("failed to seek to tail of journal: %s", syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -961,7 +961,7 @@ func (j *Journal) SeekRealtimeUsec(usec uint64) error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to seek to %d: %d", usec, syscall.Errno(-r))
+		return fmt.Errorf("failed to seek to %d: %s", usec, syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -984,7 +984,7 @@ func (j *Journal) SeekCursor(cursor string) error {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return fmt.Errorf("failed to seek to cursor %q: %d", cursor, syscall.Errno(-r))
+		return fmt.Errorf("failed to seek to cursor %q: %s", cursor, syscall.Errno(-r).Error())
 	}
 
 	return nil
@@ -1031,7 +1031,7 @@ func (j *Journal) GetUsage() (uint64, error) {
 	j.mu.Unlock()
 
 	if r < 0 {
-		return 0, fmt.Errorf("failed to get journal disk space usage: %d", syscall.Errno(-r))
+		return 0, fmt.Errorf("failed to get journal disk space usage: %s", syscall.Errno(-r).Error())
 	}
 
 	return uint64(out), nil
@@ -1065,7 +1065,7 @@ func (j *Journal) GetUniqueValues(field string) ([]string, error) {
 	r := C.my_sd_journal_query_unique(sd_journal_query_unique, j.cjournal, f)
 
 	if r < 0 {
-		return nil, fmt.Errorf("failed to query journal: %d", syscall.Errno(-r))
+		return nil, fmt.Errorf("failed to query journal: %s", syscall.Errno(-r).Error())
 	}
 
 	// Implements the SD_JOURNAL_FOREACH_UNIQUE macro from sd-journal.h
@@ -1079,7 +1079,7 @@ func (j *Journal) GetUniqueValues(field string) ([]string, error) {
 		}
 
 		if r < 0 {
-			return nil, fmt.Errorf("failed to read message field: %d", syscall.Errno(-r))
+			return nil, fmt.Errorf("failed to read message field: %s", syscall.Errno(-r).Error())
 		}
 
 		msg := C.GoStringN((*C.char)(d), C.int(l))
@@ -1111,7 +1111,7 @@ func (j *Journal) GetCatalog() (string, error) {
 	defer C.free(unsafe.Pointer(c))
 
 	if r < 0 {
-		return "", fmt.Errorf("failed to retrieve catalog entry for current journal entry: %d", syscall.Errno(-r))
+		return "", fmt.Errorf("failed to retrieve catalog entry for current journal entry: %s", syscall.Errno(-r).Error())
 	}
 
 	catalog := C.GoString(c)
diff --git a/vendor/github.com/cyphar/filepath-securejoin/VERSION b/vendor/github.com/cyphar/filepath-securejoin/VERSION
index 0c62199f1..ee1372d33 100644
--- a/vendor/github.com/cyphar/filepath-securejoin/VERSION
+++ b/vendor/github.com/cyphar/filepath-securejoin/VERSION
@@ -1 +1 @@
-0.2.1
+0.2.2
diff --git a/vendor/github.com/cyphar/filepath-securejoin/join.go b/vendor/github.com/cyphar/filepath-securejoin/join.go
index f20985479..c4ca3d713 100644
--- a/vendor/github.com/cyphar/filepath-securejoin/join.go
+++ b/vendor/github.com/cyphar/filepath-securejoin/join.go
@@ -12,7 +12,6 @@ package securejoin
 
 import (
 	"bytes"
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -23,7 +22,7 @@ import (
 
 // ErrSymlinkLoop is returned by SecureJoinVFS when too many symlinks have been
 // evaluated in attempting to securely join the two given paths.
-var ErrSymlinkLoop = fmt.Errorf("SecureJoin: too many links")
+var ErrSymlinkLoop = errors.Wrap(syscall.ELOOP, "secure join")
 
 // IsNotExist tells you if err is an error that implies that either the path
 // accessed does not exist (or path components don't exist). This is
diff --git a/vendor/github.com/docker/distribution/.gitignore b/vendor/github.com/docker/distribution/.gitignore
index 1c3ae0a77..4cf7888e9 100644
--- a/vendor/github.com/docker/distribution/.gitignore
+++ b/vendor/github.com/docker/distribution/.gitignore
@@ -35,3 +35,4 @@ bin/*
 # Editor/IDE specific files.
 *.sublime-project
 *.sublime-workspace
+.idea/*
diff --git a/vendor/github.com/docker/distribution/.gometalinter.json b/vendor/github.com/docker/distribution/.gometalinter.json
new file mode 100644
index 000000000..9df5b14bc
--- /dev/null
+++ b/vendor/github.com/docker/distribution/.gometalinter.json
@@ -0,0 +1,16 @@
+{
+  "Vendor": true,
+  "Deadline": "2m",
+  "Sort": ["linter", "severity", "path", "line"],
+  "EnableGC": true,
+  "Enable": [
+    "structcheck",
+    "staticcheck",
+    "unconvert",
+
+    "gofmt",
+    "goimports",
+    "golint",
+    "vet"
+  ]
+}
diff --git a/vendor/github.com/docker/distribution/.mailmap b/vendor/github.com/docker/distribution/.mailmap
index d99106019..0f48321d4 100644
--- a/vendor/github.com/docker/distribution/.mailmap
+++ b/vendor/github.com/docker/distribution/.mailmap
@@ -1,9 +1,9 @@
-Stephen J Day <stephen.day@docker.com>  Stephen Day <stevvooe@users.noreply.github.com>
-Stephen J Day <stephen.day@docker.com>  Stephen Day <stevvooe@gmail.com>
-Olivier Gambier <olivier@docker.com>    Olivier Gambier <dmp42@users.noreply.github.com>
-Brian Bland <brian.bland@docker.com>    Brian Bland <r4nd0m1n4t0r@gmail.com>
+Stephen J Day <stephen.day@docker.com> Stephen Day <stevvooe@users.noreply.github.com>
+Stephen J Day <stephen.day@docker.com> Stephen Day <stevvooe@gmail.com>
+Olivier Gambier <olivier@docker.com> Olivier Gambier <dmp42@users.noreply.github.com>
+Brian Bland <brian.bland@docker.com> Brian Bland <r4nd0m1n4t0r@gmail.com>
 Brian Bland <brian.bland@docker.com> Brian Bland <brian.t.bland@gmail.com>
-Josh Hawn <josh.hawn@docker.com>        Josh Hawn <jlhawn@berkeley.edu>
+Josh Hawn <josh.hawn@docker.com> Josh Hawn <jlhawn@berkeley.edu>
 Richard Scothern <richard.scothern@docker.com> Richard <richard.scothern@gmail.com>
 Richard Scothern <richard.scothern@docker.com> Richard Scothern <richard.scothern@gmail.com>
 Andrew Meredith <andymeredith@gmail.com> Andrew Meredith <kendru@users.noreply.github.com>
@@ -16,3 +16,17 @@ davidli <wenquan.li@hp.com> davidli <wenquan.li@hpe.com>
 Omer Cohen <git@omer.io> Omer Cohen <git@omerc.net>
 Eric Yang <windfarer@gmail.com> Eric Yang <Windfarer@users.noreply.github.com>
 Nikita Tarasov <nikita@mygento.ru> Nikita <luckyraul@users.noreply.github.com>
+Yu Wang <yuwa@microsoft.com> yuwaMSFT2 <yuwa@microsoft.com>
+Yu Wang <yuwa@microsoft.com> Yu Wang (UC) <yuwa@microsoft.com>
+Olivier Gambier <olivier@docker.com> dmp <dmp@loaner.local>
+Olivier Gambier <olivier@docker.com> Olivier <o+github@gambier.email>
+Olivier Gambier <olivier@docker.com> Olivier <dmp42@users.noreply.github.com>
+Elsan Li 李楠 <elsanli@tencent.com> elsanli(李楠) <elsanli@tencent.com>
+Rui Cao <ruicao@alauda.io> ruicao <ruicao@alauda.io>
+Gwendolynne Barr <gwendolynne.barr@docker.com> gbarr01 <gwendolynne.barr@docker.com>
+Haibing Zhou 周海兵 <zhouhaibing089@gmail.com> zhouhaibing089 <zhouhaibing089@gmail.com>
+Feng Honglin <tifayuki@gmail.com> tifayuki <tifayuki@gmail.com>
+Helen Xie <xieyulin821@harmonycloud.cn> Helen-xie <xieyulin821@harmonycloud.cn>
+Mike Brown <brownwm@us.ibm.com> Mike Brown <mikebrow@users.noreply.github.com>
+Manish Tomar <manish.tomar@docker.com> Manish Tomar <manishtomar@users.noreply.github.com>
+Sakeven Jiang <jc5930@sina.cn> sakeven <jc5930@sina.cn>
diff --git a/vendor/github.com/docker/distribution/.travis.yml b/vendor/github.com/docker/distribution/.travis.yml
new file mode 100644
index 000000000..44ced6045
--- /dev/null
+++ b/vendor/github.com/docker/distribution/.travis.yml
@@ -0,0 +1,51 @@
+dist: trusty
+sudo: required
+# setup travis so that we can run containers for integration tests
+services:
+  - docker
+
+language: go
+
+go:
+  - "1.11.x"
+
+go_import_path: github.com/docker/distribution
+
+addons:
+  apt:
+    packages:
+      - python-minimal
+
+
+env:
+  - TRAVIS_GOOS=linux DOCKER_BUILDTAGS="include_oss include_gcs" TRAVIS_CGO_ENABLED=1
+
+before_install:
+  - uname -r
+  - sudo apt-get -q update
+
+install:
+  - go get -u github.com/vbatts/git-validation
+    # TODO: Add enforcement of license
+    # - go get -u github.com/kunalkushwaha/ltag
+  - cd $TRAVIS_BUILD_DIR
+
+script:
+  - export GOOS=$TRAVIS_GOOS
+  - export CGO_ENABLED=$TRAVIS_CGO_ENABLED
+  - DCO_VERBOSITY=-q script/validate/dco
+  - GOOS=linux script/setup/install-dev-tools
+  - script/validate/vendor
+  - go build -i .
+  - make check
+  - make build
+  - make binaries
+    # Currently takes too long
+    #- if [ "$GOOS" = "linux" ]; then make test-race ; fi
+  - if [ "$GOOS" = "linux" ]; then make coverage ; fi
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash) -F linux
+
+before_deploy:
+    # Run tests with storage driver configurations
diff --git a/vendor/github.com/docker/distribution/AUTHORS b/vendor/github.com/docker/distribution/AUTHORS
deleted file mode 100644
index 252ff8aa2..000000000
--- a/vendor/github.com/docker/distribution/AUTHORS
+++ /dev/null
@@ -1,182 +0,0 @@
-a-palchikov <deemok@gmail.com>
-Aaron Lehmann <aaron.lehmann@docker.com>
-Aaron Schlesinger <aschlesinger@deis.com>
-Aaron Vinson <avinson.public@gmail.com>
-Adam Duke <adam.v.duke@gmail.com>
-Adam Enger <adamenger@gmail.com>
-Adrian Mouat <adrian.mouat@gmail.com>
-Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>
-Alex Chan <alex.chan@metaswitch.com>
-Alex Elman <aelman@indeed.com>
-Alexey Gladkov <gladkov.alexey@gmail.com>
-allencloud <allen.sun@daocloud.io>
-amitshukla <ashukla73@hotmail.com>
-Amy Lindburg <amy.lindburg@docker.com>
-Andrew Hsu <andrewhsu@acm.org>
-Andrew Meredith <andymeredith@gmail.com>
-Andrew T Nguyen <andrew.nguyen@docker.com>
-Andrey Kostov <kostov.andrey@gmail.com>
-Andy Goldstein <agoldste@redhat.com>
-Anis Elleuch <vadmeste@gmail.com>
-Anton Tiurin <noxiouz@yandex.ru>
-Antonio Mercado <amercado@thinknode.com>
-Antonio Murdaca <runcom@redhat.com>
-Anusha Ragunathan <anusha@docker.com>
-Arien Holthuizen <aholthuizen@schubergphilis.com>
-Arnaud Porterie <arnaud.porterie@docker.com>
-Arthur Baars <arthur@semmle.com>
-Asuka Suzuki <hello@tanksuzuki.com>
-Avi Miller <avi.miller@oracle.com>
-Ayose Cazorla <ayosec@gmail.com>
-BadZen <dave.trombley@gmail.com>
-Ben Bodenmiller <bbodenmiller@hotmail.com>
-Ben Firshman <ben@firshman.co.uk>
-bin liu <liubin0329@gmail.com>
-Brian Bland <brian.bland@docker.com>
-burnettk <burnettk@gmail.com>
-Carson A <ca@carsonoid.net>
-Cezar Sa Espinola <cezarsa@gmail.com>
-Charles Smith <charles.smith@docker.com>
-Chris Dillon <squarism@gmail.com>
-cuiwei13 <cuiwei13@pku.edu.cn>
-cyli <cyli@twistedmatrix.com>
-Daisuke Fujita <dtanshi45@gmail.com>
-Daniel Huhn <daniel@danielhuhn.de>
-Darren Shepherd <darren@rancher.com>
-Dave Trombley <dave.trombley@gmail.com>
-Dave Tucker <dt@docker.com>
-David Lawrence <david.lawrence@docker.com>
-David Verhasselt <david@crowdway.com>
-David Xia <dxia@spotify.com>
-davidli <wenquan.li@hp.com>
-Dejan Golja <dejan@golja.org>
-Derek McGowan <derek@mcgstyle.net>
-Diogo Mónica <diogo.monica@gmail.com>
-DJ Enriquez <dj.enriquez@infospace.com>
-Donald Huang <don.hcd@gmail.com>
-Doug Davis <dug@us.ibm.com>
-Edgar Lee <edgar.lee@docker.com>
-Eric Yang <windfarer@gmail.com>
-Fabio Berchtold <jamesclonk@jamesclonk.ch>
-Fabio Huser <fabio@fh1.ch>
-farmerworking <farmerworking@gmail.com>
-Felix Yan <felixonmars@archlinux.org>
-Florentin Raud <florentin.raud@gmail.com>
-Frank Chen <frankchn@gmail.com>
-Frederick F. Kautz IV <fkautz@alumni.cmu.edu>
-gabriell nascimento <gabriell@bluesoft.com.br>
-Gleb Schukin <gschukin@ptsecurity.com>
-harche <p.harshal@gmail.com>
-Henri Gomez <henri.gomez@gmail.com>
-Hu Keping <hukeping@huawei.com>
-Hua Wang <wanghua.humble@gmail.com>
-HuKeping <hukeping@huawei.com>
-Ian Babrou <ibobrik@gmail.com>
-igayoso <igayoso@gmail.com>
-Jack Griffin <jackpg14@gmail.com>
-James Findley <jfindley@fastmail.com>
-Jason Freidman <jason.freidman@gmail.com>
-Jason Heiss <jheiss@aput.net>
-Jeff Nickoloff <jeff@allingeek.com>
-Jess Frazelle <acidburn@google.com>
-Jessie Frazelle <jessie@docker.com>
-jhaohai <jhaohai@foxmail.com>
-Jianqing Wang <tsing@jianqing.org>
-Jihoon Chung <jihoon@gmail.com>
-Joao Fernandes <joao.fernandes@docker.com>
-John Mulhausen <john@docker.com>
-John Starks <jostarks@microsoft.com>
-Jon Johnson <jonjohnson@google.com>
-Jon Poler <jonathan.poler@apcera.com>
-Jonathan Boulle <jonathanboulle@gmail.com>
-Jordan Liggitt <jliggitt@redhat.com>
-Josh Chorlton <josh.chorlton@docker.com>
-Josh Hawn <josh.hawn@docker.com>
-Julien Fernandez <julien.fernandez@gmail.com>
-Ke Xu <leonhartx.k@gmail.com>
-Keerthan Mala <kmala@engineyard.com>
-Kelsey Hightower <kelsey.hightower@gmail.com>
-Kenneth Lim <kennethlimcp@gmail.com>
-Kenny Leung <kleung@google.com>
-Li Yi <denverdino@gmail.com>
-Liu Hua <sdu.liu@huawei.com>
-liuchang0812 <liuchang0812@gmail.com>
-Lloyd Ramey <lnr0626@gmail.com>
-Louis Kottmann <louis.kottmann@gmail.com>
-Luke Carpenter <x@rubynerd.net>
-Marcus Martins <marcus@docker.com>
-Mary Anthony <mary@docker.com>
-Matt Bentley <mbentley@mbentley.net>
-Matt Duch <matt@learnmetrics.com>
-Matt Moore <mattmoor@google.com>
-Matt Robenolt <matt@ydekproductions.com>
-Matthew Green <greenmr@live.co.uk>
-Michael Prokop <mika@grml.org>
-Michal Minar <miminar@redhat.com>
-Michal Minář <miminar@redhat.com>
-Mike Brown <brownwm@us.ibm.com>
-Miquel Sabaté <msabate@suse.com>
-Misty Stanley-Jones <misty@apache.org>
-Misty Stanley-Jones <misty@docker.com>
-Morgan Bauer <mbauer@us.ibm.com>
-moxiegirl <mary@docker.com>
-Nathan Sullivan <nathan@nightsys.net>
-nevermosby <robolwq@qq.com>
-Nghia Tran <tcnghia@gmail.com>
-Nikita Tarasov <nikita@mygento.ru>
-Noah Treuhaft <noah.treuhaft@docker.com>
-Nuutti Kotivuori <nuutti.kotivuori@poplatek.fi>
-Oilbeater <liumengxinfly@gmail.com>
-Olivier Gambier <olivier@docker.com>
-Olivier Jacques <olivier.jacques@hp.com>
-Omer Cohen <git@omer.io>
-Patrick Devine <patrick.devine@docker.com>
-Phil Estes <estesp@linux.vnet.ibm.com>
-Philip Misiowiec <philip@atlashealth.com>
-Pierre-Yves Ritschard <pyr@spootnik.org>
-Qiao Anran <qiaoanran@gmail.com>
-Randy Barlow <randy@electronsweatshop.com>
-Richard Scothern <richard.scothern@docker.com>
-Rodolfo Carvalho <rhcarvalho@gmail.com>
-Rusty Conover <rusty@luckydinosaur.com>
-Sean Boran <Boran@users.noreply.github.com>
-Sebastiaan van Stijn <github@gone.nl>
-Sebastien Coavoux <s.coavoux@free.fr>
-Serge Dubrouski <sergeyfd@gmail.com>
-Sharif Nassar <sharif@mrwacky.com>
-Shawn Falkner-Horine <dreadpirateshawn@gmail.com>
-Shreyas Karnik <karnik.shreyas@gmail.com>
-Simon Thulbourn <simon+github@thulbourn.com>
-spacexnice <yaoyao.xyy@alibaba-inc.com>
-Spencer Rinehart <anubis@overthemonkey.com>
-Stan Hu <stanhu@gmail.com>
-Stefan Majewsky <stefan.majewsky@sap.com>
-Stefan Weil <sw@weilnetz.de>
-Stephen J Day <stephen.day@docker.com>
-Sungho Moon <sungho.moon@navercorp.com>
-Sven Dowideit <SvenDowideit@home.org.au>
-Sylvain Baubeau <sbaubeau@redhat.com>
-Ted Reed <ted.reed@gmail.com>
-tgic <farmer1992@gmail.com>
-Thomas Sjögren <konstruktoid@users.noreply.github.com>
-Tianon Gravi <admwiggin@gmail.com>
-Tibor Vass <teabee89@gmail.com>
-Tonis Tiigi <tonistiigi@gmail.com>
-Tony Holdstock-Brown <tony@docker.com>
-Trevor Pounds <trevor.pounds@gmail.com>
-Troels Thomsen <troels@thomsen.io>
-Victor Vieux <vieux@docker.com>
-Victoria Bialas <victoria.bialas@docker.com>
-Vincent Batts <vbatts@redhat.com>
-Vincent Demeester <vincent@sbr.pm>
-Vincent Giersch <vincent.giersch@ovh.net>
-W. Trevor King <wking@tremily.us>
-weiyuan.yl <weiyuan.yl@alibaba-inc.com>
-xg.song <xg.song@venusource.com>
-xiekeyang <xiekeyang@huawei.com>
-Yann ROBERT <yann.robert@anantaplex.fr>
-yaoyao.xyy <yaoyao.xyy@alibaba-inc.com>
-yuexiao-wang <wang.yuexiao@zte.com.cn>
-yuzou <zouyu7@huawei.com>
-zhouhaibing089 <zhouhaibing089@gmail.com>
-姜继忠 <jizhong.jiangjz@alibaba-inc.com>
diff --git a/vendor/github.com/docker/distribution/BUILDING.md b/vendor/github.com/docker/distribution/BUILDING.md
index c59828182..2981d016b 100644
--- a/vendor/github.com/docker/distribution/BUILDING.md
+++ b/vendor/github.com/docker/distribution/BUILDING.md
@@ -108,7 +108,7 @@ directory. This includes formatting, vetting, linting, building,
 testing and generating tagged binaries. We can verify this worked by running
 the registry binary generated in the "./bin" directory:
 
-    $ ./bin/registry -version
+    $ ./bin/registry --version
     ./bin/registry github.com/docker/distribution v2.0.0-alpha.2-80-g16d8b2c.m
 
 ### Optional build tags
diff --git a/vendor/github.com/docker/distribution/CHANGELOG.md b/vendor/github.com/docker/distribution/CHANGELOG.md
deleted file mode 100644
index e7b16b3c2..000000000
--- a/vendor/github.com/docker/distribution/CHANGELOG.md
+++ /dev/null
@@ -1,108 +0,0 @@
-# Changelog
-
-## 2.6.0 (2017-01-18)
-
-#### Storage
-- S3: fixed bug in delete due to read-after-write inconsistency
-- S3: allow EC2 IAM roles to be used when authorizing region endpoints
-- S3: add Object ACL Support
-- S3: fix delete method's notion of subpaths
-- S3: use multipart upload API in `Move` method for performance
-- S3: add v2 signature signing for legacy S3 clones
-- Swift: add simple heuristic to detect incomplete DLOs during read ops
-- Swift: support different user and tenant domains
-- Swift: bulk deletes in chunks
-- Aliyun OSS: fix delete method's notion of subpaths
-- Aliyun OSS: optimize data copy after upload finishes
-- Azure: close leaking response body
-- Fix storage drivers dropping non-EOF errors when listing repositories
-- Compare path properly when listing repositories in catalog
-- Add a foreign layer URL host whitelist
-- Improve catalog enumerate runtime
-
-#### Registry
-- Export `storage.CreateOptions` in top-level package
-- Enable notifications to endpoints that use self-signed certificates
-- Properly validate multi-URL foreign layers
-- Add control over validation of URLs in pushed manifests
-- Proxy mode: fix socket leak when pull is cancelled
-- Tag service: properly handle error responses on HEAD request
-- Support for custom authentication URL in proxying registry
-- Add configuration option to disable access logging
-- Add notification filtering by target media type
-- Manifest: `References()` returns all children
-- Honor `X-Forwarded-Port` and Forwarded headers
-- Reference: Preserve tag and digest in With* functions
-- Add policy configuration for enforcing repository classes
-
-#### Client
-- Changes the client Tags `All()` method to follow links
-- Allow registry clients to connect via HTTP2
-- Better handling of OAuth errors in client
-  
-#### Spec
-- Manifest: clarify relationship between urls and foreign layers
-- Authorization: add support for repository classes
-
-#### Manifest
-- Override media type returned from `Stat()` for existing manifests
-- Add plugin mediatype to distribution manifest
-
-#### Docs
-- Document `TOOMANYREQUESTS` error code
-- Document required Let's Encrypt port
-- Improve documentation around implementation of OAuth2
-- Improve documentation for configuration
-
-#### Auth
-- Add support for registry type in scope
-- Add support for using v2 ping challenges for v1
-- Add leeway to JWT `nbf` and `exp` checking
-- htpasswd: dynamically parse htpasswd file
-- Fix missing auth headers with PATCH HTTP request when pushing to default port
-
-#### Dockerfile
-- Update to go1.7
-- Reorder Dockerfile steps for better layer caching
-
-#### Notes
-
-Documentation has moved to the documentation repository at
-`github.com/docker/docker.github.io/tree/master/registry`
-
-The registry is go 1.7 compliant, and passes newer, more restrictive `lint` and `vet` ing.
-
-
-## 2.5.0 (2016-06-14)
-
-#### Storage
-- Ensure uploads directory is cleaned after upload is committed
-- Add ability to cap concurrent operations in filesystem driver
-- S3: Add 'us-gov-west-1' to the valid region list
-- Swift: Handle ceph not returning Last-Modified header for HEAD requests
-- Add redirect middleware
-
-#### Registry
-- Add support for blobAccessController middleware
-- Add support for layers from foreign sources
-- Remove signature store
-- Add support for Let's Encrypt
-- Correct yaml key names in configuration
-
-#### Client
-- Add option to get content digest from manifest get
-
-#### Spec
-- Update the auth spec scope grammar to reflect the fact that hostnames are optionally supported
-- Clarify API documentation around catalog fetch behavior
-
-#### API
-- Support returning HTTP 429 (Too Many Requests)
-
-#### Documentation
-- Update auth documentation examples to show "expires in" as int
-
-#### Docker Image
-- Use Alpine Linux as base image
-
-
diff --git a/vendor/github.com/docker/distribution/CONTRIBUTING.md b/vendor/github.com/docker/distribution/CONTRIBUTING.md
index afe4e92a1..4c067d9e7 100644
--- a/vendor/github.com/docker/distribution/CONTRIBUTING.md
+++ b/vendor/github.com/docker/distribution/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Contributing to the registry
 
-## Before reporting an issue...
+## Before reporting an issue...
 
 ### If your problem is with...
 
@@ -35,7 +35,7 @@ By following these simple rules you will get better and faster feedback on your
 
  - search the bugtracker for an already reported issue
 
-### If you found an issue that describes your problem:
+### If you found an issue that describes your problem:
 
  - please read other user comments first, and confirm this is the same issue: a given error condition might be indicative of different problems - you may also find a workaround in the comments
  - please refrain from adding "same thing here" or "+1" comments
diff --git a/vendor/github.com/docker/distribution/Dockerfile b/vendor/github.com/docker/distribution/Dockerfile
index ac8dbca2f..9537817ca 100644
--- a/vendor/github.com/docker/distribution/Dockerfile
+++ b/vendor/github.com/docker/distribution/Dockerfile
@@ -1,20 +1,22 @@
-FROM golang:1.8-alpine
+FROM golang:1.11-alpine AS build
 
 ENV DISTRIBUTION_DIR /go/src/github.com/docker/distribution
-ENV DOCKER_BUILDTAGS include_oss include_gcs
+ENV BUILDTAGS include_oss include_gcs
 
 ARG GOOS=linux
 ARG GOARCH=amd64
+ARG GOARM=6
 
 RUN set -ex \
-    && apk add --no-cache make git
+    && apk add --no-cache make git file
 
 WORKDIR $DISTRIBUTION_DIR
 COPY . $DISTRIBUTION_DIR
-COPY cmd/registry/config-dev.yml /etc/docker/registry/config.yml
-
-RUN make PREFIX=/go clean binaries
+RUN CGO_ENABLED=0 make PREFIX=/go clean binaries && file ./bin/registry | grep "statically linked"
 
+FROM alpine
+COPY cmd/registry/config-dev.yml /etc/docker/registry/config.yml
+COPY --from=build /go/src/github.com/docker/distribution/bin/registry /bin/registry
 VOLUME ["/var/lib/registry"]
 EXPOSE 5000
 ENTRYPOINT ["registry"]
diff --git a/vendor/github.com/docker/distribution/MAINTAINERS b/vendor/github.com/docker/distribution/MAINTAINERS
index bda400150..3183620c5 100644
--- a/vendor/github.com/docker/distribution/MAINTAINERS
+++ b/vendor/github.com/docker/distribution/MAINTAINERS
@@ -6,18 +6,198 @@
 # It is structured to be consumable by both humans and programs.
 # To extract its contents programmatically, use any TOML-compliant parser.
 #
-# This file is compiled into the MAINTAINERS file in docker/opensource.
-#
+
+[Rules]
+
+	[Rules.maintainers]
+
+	title = "What is a maintainer?"
+
+	text = """
+There are different types of maintainers, with different responsibilities, but
+all maintainers have 3 things in common:
+
+1) They share responsibility in the project's success.
+2) They have made a long-term, recurring time investment to improve the project.
+3) They spend that time doing whatever needs to be done, not necessarily what
+is the most interesting or fun.
+
+Maintainers are often under-appreciated, because their work is harder to appreciate.
+It's easy to appreciate a really cool and technically advanced feature. It's harder
+to appreciate the absence of bugs, the slow but steady improvement in stability,
+or the reliability of a release process. But those things distinguish a good
+project from a great one.
+"""
+
+	[Rules.reviewer]
+
+	title = "What is a reviewer?"
+
+	text = """
+A reviewer is a core role within the project.
+They share in reviewing issues and pull requests and their LGTM count towards the
+required LGTM count to merge a code change into the project.
+
+Reviewers are part of the organization but do not have write access.
+Becoming a reviewer is a core aspect in the journey to becoming a maintainer.
+"""
+
+	[Rules.adding-maintainers]
+
+	title = "How are maintainers added?"
+
+	text = """
+Maintainers are first and foremost contributors that have shown they are
+committed to the long term success of a project. Contributors wanting to become
+maintainers are expected to be deeply involved in contributing code, pull
+request review, and triage of issues in the project for more than three months.
+
+Just contributing does not make you a maintainer, it is about building trust
+with the current maintainers of the project and being a person that they can
+depend on and trust to make decisions in the best interest of the project.
+
+Periodically, the existing maintainers curate a list of contributors that have
+shown regular activity on the project over the prior months. From this list,
+maintainer candidates are selected and proposed on the maintainers mailing list.
+
+After a candidate has been announced on the maintainers mailing list, the
+existing maintainers are given five business days to discuss the candidate,
+raise objections and cast their vote. Candidates must be approved by at least 66% of the current maintainers by adding their vote on the mailing
+list. Only maintainers of the repository that the candidate is proposed for are
+allowed to vote.
+
+If a candidate is approved, a maintainer will contact the candidate to invite
+the candidate to open a pull request that adds the contributor to the
+MAINTAINERS file. The candidate becomes a maintainer once the pull request is
+merged.
+"""
+
+	[Rules.stepping-down-policy]
+
+	title = "Stepping down policy"
+
+	text = """
+Life priorities, interests, and passions can change. If you're a maintainer but
+feel you must remove yourself from the list, inform other maintainers that you
+intend to step down, and if possible, help find someone to pick up your work.
+At the very least, ensure your work can be continued where you left off.
+
+After you've informed other maintainers, create a pull request to remove
+yourself from the MAINTAINERS file.
+"""
+
+	[Rules.inactive-maintainers]
+
+	title = "Removal of inactive maintainers"
+
+	text = """
+Similar to the procedure for adding new maintainers, existing maintainers can
+be removed from the list if they do not show significant activity on the
+project. Periodically, the maintainers review the list of maintainers and their
+activity over the last three months.
+
+If a maintainer has shown insufficient activity over this period, a neutral
+person will contact the maintainer to ask if they want to continue being
+a maintainer. If the maintainer decides to step down as a maintainer, they
+open a pull request to be removed from the MAINTAINERS file.
+
+If the maintainer wants to remain a maintainer, but is unable to perform the
+required duties they can be removed with a vote of at least 66% of
+the current maintainers. An e-mail is sent to the
+mailing list, inviting maintainers of the project to vote. The voting period is
+five business days. Issues related to a maintainer's performance should be
+discussed with them among the other maintainers so that they are not surprised
+by a pull request removing them.
+"""
+
+	[Rules.decisions]
+
+	title = "How are decisions made?"
+
+	text = """
+Short answer: EVERYTHING IS A PULL REQUEST.
+
+distribution is an open-source project with an open design philosophy. This means
+that the repository is the source of truth for EVERY aspect of the project,
+including its philosophy, design, road map, and APIs. *If it's part of the
+project, it's in the repo. If it's in the repo, it's part of the project.*
+
+As a result, all decisions can be expressed as changes to the repository. An
+implementation change is a change to the source code. An API change is a change
+to the API specification. A philosophy change is a change to the philosophy
+manifesto, and so on.
+
+All decisions affecting distribution, big and small, follow the same 3 steps:
+
+* Step 1: Open a pull request. Anyone can do this.
+
+* Step 2: Discuss the pull request. Anyone can do this.
+
+* Step 3: Merge or refuse the pull request. Who does this depends on the nature
+of the pull request and which areas of the project it affects.
+"""
+
+	[Rules.DCO]
+
+	title = "Helping contributors with the DCO"
+
+	text = """
+The [DCO or `Sign your work`](
+https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work)
+requirement is not intended as a roadblock or speed bump.
+
+Some distribution contributors are not as familiar with `git`, or have used a web
+based editor, and thus asking them to `git commit --amend -s` is not the best
+way forward.
+
+In this case, maintainers can update the commits based on clause (c) of the DCO.
+The most trivial way for a contributor to allow the maintainer to do this, is to
+add a DCO signature in a pull requests's comment, or a maintainer can simply
+note that the change is sufficiently trivial that it does not substantially
+change the existing contribution - i.e., a spelling change.
+
+When you add someone's DCO, please also add your own to keep a log.
+"""
+
+	[Rules."no direct push"]
+
+	title = "I'm a maintainer. Should I make pull requests too?"
+
+	text = """
+Yes. Nobody should ever push to master directly. All changes should be
+made through a pull request.
+"""
+
+	[Rules.tsc]
+
+	title = "Conflict Resolution and technical disputes"
+
+	text = """
+distribution defers to the [Technical Steering Committee](https://github.com/moby/tsc) for escalations and resolution on disputes for technical matters."
+	"""
+
+	[Rules.meta]
+
+	title = "How is this process changed?"
+
+	text = "Just like everything else: by making a pull request :)"
+
+# Current project organization
 [Org]
-	[Org."Core maintainers"]
+
+	[Org.Maintainers]
 		people = [
-			"aaronlehmann",
 			"dmcgowan",
 			"dmp42",
-			"richardscothern",
-			"shykes",
 			"stevvooe",
 		]
+	[Org.Reviewers]
+		people = [
+			"manishtomar",
+			"caervs",
+			"davidswu",
+			"RobbKistler"
+		]
 
 [people]
 
@@ -27,10 +207,15 @@
 
 	# ADD YOURSELF HERE IN ALPHABETICAL ORDER
 
-	[people.aaronlehmann]
-	Name = "Aaron Lehmann"
-	Email = "aaron.lehmann@docker.com"
-	GitHub = "aaronlehmann"
+	[people.caervs]
+	Name = "Ryan Abrams"
+	Email = "rdabrams@gmail.com"
+	GitHub = "caervs"
+
+	[people.davidswu]
+	Name = "David Wu"
+	Email = "dwu7401@gmail.com"
+	GitHub = "davidswu"
 
 	[people.dmcgowan]
 	Name = "Derek McGowan"
@@ -42,15 +227,15 @@
 	Email = "olivier@docker.com"
 	GitHub = "dmp42"
 
-	[people.richardscothern]
-	Name = "Richard Scothern"
-	Email = "richard.scothern@gmail.com"
-	GitHub = "richardscothern"
+	[people.manishtomar]
+	Name = "Manish Tomar"
+	Email = "manish.tomar@docker.com"
+	GitHub = "manishtomar"
 
-	[people.shykes]
-	Name = "Solomon Hykes"
-	Email = "solomon@docker.com"
-	GitHub = "shykes"
+	[people.RobbKistler]
+	Name = "Robb Kistler"
+	Email = "robb.kistler@docker.com"
+	GitHub = "RobbKistler"
 
 	[people.stevvooe]
 	Name = "Stephen Day"
diff --git a/vendor/github.com/docker/distribution/Makefile b/vendor/github.com/docker/distribution/Makefile
index 7c6f9c7a6..4635c6eca 100644
--- a/vendor/github.com/docker/distribution/Makefile
+++ b/vendor/github.com/docker/distribution/Makefile
@@ -1,9 +1,21 @@
-# Set an output prefix, which is the local directory if not specified
-PREFIX?=$(shell pwd)
-
+# Root directory of the project (absolute path).
+ROOTDIR=$(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Used to populate version variable in main package.
 VERSION=$(shell git describe --match 'v[0-9]*' --dirty='.m' --always)
+REVISION=$(shell git rev-parse HEAD)$(shell if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi)
+
+
+PKG=github.com/docker/distribution
+
+# Project packages.
+PACKAGES=$(shell go list -tags "${BUILDTAGS}" ./... | grep -v /vendor/)
+INTEGRATION_PACKAGE=${PKG}
+COVERAGE_PACKAGES=$(filter-out ${PKG}/registry/storage/driver/%,${PACKAGES})
+
+
+# Project binaries.
+COMMANDS=registry digest registry-api-descriptor-template
 
 # Allow turning off function inlining and variable registerization
 ifeq (${DISABLE_OPTIMIZATION},true)
@@ -11,89 +23,80 @@ ifeq (${DISABLE_OPTIMIZATION},true)
 	VERSION:="$(VERSION)-noopt"
 endif
 
-GO_LDFLAGS=-ldflags "-X `go list ./version`.Version=$(VERSION)"
-
-.PHONY: all build binaries clean dep-restore dep-save dep-validate fmt lint test test-full vet
-.DEFAULT: all
-all: fmt vet lint build test binaries
-
-AUTHORS: .mailmap .git/HEAD
-	 git log --format='%aN <%aE>' | sort -fu > $@
-
-# This only needs to be generated by hand when cutting full releases.
-version/version.go:
-	./version/version.sh > $@
-
-# Required for go 1.5 to build
-GO15VENDOREXPERIMENT := 1
+WHALE = "+"
 
 # Go files
+#
+TESTFLAGS_RACE=
 GOFILES=$(shell find . -type f -name '*.go')
+GO_TAGS=$(if $(BUILDTAGS),-tags "$(BUILDTAGS)",)
+GO_LDFLAGS=-ldflags '-s -w -X $(PKG)/version.Version=$(VERSION) -X $(PKG)/version.Revision=$(REVISION) -X $(PKG)/version.Package=$(PKG) $(EXTRA_LDFLAGS)'
 
-# Package list
-PKGS=$(shell go list -tags "${DOCKER_BUILDTAGS}" ./... | grep -v ^github.com/docker/distribution/vendor/)
-
-# Resolving binary dependencies for specific targets
-GOLINT=$(shell which golint || echo '')
-VNDR=$(shell which vndr || echo '')
-
-${PREFIX}/bin/registry: $(GOFILES)
-	@echo "+ $@"
-	@go build -tags "${DOCKER_BUILDTAGS}" -o $@ ${GO_LDFLAGS}  ${GO_GCFLAGS} ./cmd/registry
-
-${PREFIX}/bin/digest:  $(GOFILES)
-	@echo "+ $@"
-	@go build -tags "${DOCKER_BUILDTAGS}" -o $@ ${GO_LDFLAGS}  ${GO_GCFLAGS} ./cmd/digest
+BINARIES=$(addprefix bin/,$(COMMANDS))
 
-${PREFIX}/bin/registry-api-descriptor-template: $(GOFILES)
-	@echo "+ $@"
-	@go build -o $@ ${GO_LDFLAGS} ${GO_GCFLAGS} ./cmd/registry-api-descriptor-template
+# Flags passed to `go test`
+TESTFLAGS ?= -v $(TESTFLAGS_RACE)
+TESTFLAGS_PARALLEL ?= 8
 
-docs/spec/api.md: docs/spec/api.md.tmpl ${PREFIX}/bin/registry-api-descriptor-template
-	./bin/registry-api-descriptor-template $< > $@
+.PHONY: all build binaries check clean test test-race test-full integration coverage
+.DEFAULT: all
 
-vet:
-	@echo "+ $@"
-	@go vet -tags "${DOCKER_BUILDTAGS}" $(PKGS)
+all: binaries
 
-fmt:
-	@echo "+ $@"
-	@test -z "$$(gofmt -s -l . 2>&1 | grep -v ^vendor/ | tee /dev/stderr)" || \
-		(echo >&2 "+ please format Go code with 'gofmt -s'" && false)
+# This only needs to be generated by hand when cutting full releases.
+version/version.go:
+	@echo "$(WHALE) $@"
+	./version/version.sh > $@
 
-lint:
-	@echo "+ $@"
-	$(if $(GOLINT), , \
-		$(error Please install golint: `go get -u github.com/golang/lint/golint`))
-	@test -z "$$($(GOLINT) ./... 2>&1 | grep -v ^vendor/ | tee /dev/stderr)"
+check: ## run all linters (TODO: enable "unused", "varcheck", "ineffassign", "unconvert", "staticheck", "goimports", "structcheck")
+	@echo "$(WHALE) $@"
+	gometalinter --config .gometalinter.json ./...
+
+test: ## run tests, except integration test with test.short
+	@echo "$(WHALE) $@"
+	@go test ${GO_TAGS} -test.short ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES})
+
+test-race: ## run tests, except integration test with test.short and race
+	@echo "$(WHALE) $@"
+	@go test ${GO_TAGS} -race -test.short ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES})
+
+test-full: ## run tests, except integration tests
+	@echo "$(WHALE) $@"
+	@go test ${GO_TAGS} ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${PACKAGES})
+
+integration: ## run integration tests
+	@echo "$(WHALE) $@"
+	@go test ${TESTFLAGS} -parallel ${TESTFLAGS_PARALLEL} ${INTEGRATION_PACKAGE}
+
+coverage: ## generate coverprofiles from the unit tests
+	@echo "$(WHALE) $@"
+	@rm -f coverage.txt
+	@go test ${GO_TAGS} -i ${TESTFLAGS} $(filter-out ${INTEGRATION_PACKAGE},${COVERAGE_PACKAGES}) 2> /dev/null
+	@( for pkg in $(filter-out ${INTEGRATION_PACKAGE},${COVERAGE_PACKAGES}); do \
+		go test ${GO_TAGS} ${TESTFLAGS} \
+			-cover \
+			-coverprofile=profile.out \
+			-covermode=atomic $$pkg || exit; \
+		if [ -f profile.out ]; then \
+			cat profile.out >> coverage.txt; \
+			rm profile.out; \
+		fi; \
+	done )
+
+FORCE:
+
+# Build a binary from a cmd.
+bin/%: cmd/% FORCE
+	@echo "$(WHALE) $@${BINARY_SUFFIX}"
+	@go build ${GO_GCFLAGS} ${GO_BUILD_FLAGS} -o $@${BINARY_SUFFIX} ${GO_LDFLAGS} ${GO_TAGS}  ./$<
+
+binaries: $(BINARIES) ## build binaries
+	@echo "$(WHALE) $@"
 
 build:
-	@echo "+ $@"
-	@go build -tags "${DOCKER_BUILDTAGS}" -v ${GO_LDFLAGS} $(PKGS)
-
-test:
-	@echo "+ $@"
-	@go test -test.short -tags "${DOCKER_BUILDTAGS}" $(PKGS)
-
-test-full:
-	@echo "+ $@"
-	@go test -tags "${DOCKER_BUILDTAGS}" $(PKGS)
-
-binaries: ${PREFIX}/bin/registry ${PREFIX}/bin/digest ${PREFIX}/bin/registry-api-descriptor-template
-	@echo "+ $@"
-
-clean:
-	@echo "+ $@"
-	@rm -rf "${PREFIX}/bin/registry" "${PREFIX}/bin/digest" "${PREFIX}/bin/registry-api-descriptor-template"
-
-dep-validate:
-	@echo "+ $@"
-	$(if $(VNDR), , \
-		$(error Please install vndr: go get github.com/lk4d4/vndr))
-	@rm -Rf .vendor.bak
-	@mv vendor .vendor.bak
-	@$(VNDR)
-	@test -z "$$(diff -r vendor .vendor.bak 2>&1 | tee /dev/stderr)" || \
-		(echo >&2 "+ inconsistent dependencies! what you have in vendor.conf does not match with what you have in vendor" && false)
-	@rm -Rf vendor
-	@mv .vendor.bak vendor
+	@echo "$(WHALE) $@"
+	@go build ${GO_GCFLAGS} ${GO_BUILD_FLAGS} ${GO_LDFLAGS} ${GO_TAGS} $(PACKAGES)
+
+clean: ## clean up binaries
+	@echo "$(WHALE) $@"
+	@rm -f $(BINARIES)
diff --git a/vendor/github.com/docker/distribution/RELEASE-CHECKLIST.md b/vendor/github.com/docker/distribution/RELEASE-CHECKLIST.md
deleted file mode 100644
index 73eba5a87..000000000
--- a/vendor/github.com/docker/distribution/RELEASE-CHECKLIST.md
+++ /dev/null
@@ -1,44 +0,0 @@
-## Registry Release Checklist
-
-10. Compile release notes detailing features and since the last release.
-
-  Update the `CHANGELOG.md` file and create a PR to master with the updates.
-Once that PR has been approved by maintainers the change may be cherry-picked
-to the release branch (new release branches may be forked from this commit).
-
-20. Update the version file: `https://github.com/docker/distribution/blob/master/version/version.go`
-
-30. Update the `MAINTAINERS` (if necessary), `AUTHORS` and `.mailmap` files.
-
-```
-make AUTHORS
-```
-
-40. Create a signed tag.
-
-   Distribution uses semantic versioning.  Tags are of the format
-`vx.y.z[-rcn]`. You will need PGP installed and a PGP key which has been added
-to your Github account. The comment for the tag should include the release
-notes, use previous tags as a guide for formatting consistently. Run
-`git tag -s vx.y.z[-rcn]` to create tag and `git -v vx.y.z[-rcn]` to verify tag,
-check comment and correct commit hash.
-
-50. Push the signed tag
-
-60. Create a new [release](https://github.com/docker/distribution/releases).  In the case of a release candidate, tick the `pre-release` checkbox. 
-
-70. Update the registry binary in [distribution library image repo](https://github.com/docker/distribution-library-image) by running the update script and  opening a pull request.
-
-80. Update the official image.  Add the new version in the [official images repo](https://github.com/docker-library/official-images) by appending a new version to the `registry/registry` file with the git hash pointed to by the signed tag.  Update the major version to point to the latest version and the minor version to point to new patch release if necessary.
-e.g. to release `2.3.1`
-
-   `2.3.1 (new)`
-
-   `2.3.0 -> 2.3.0` can be removed
-
-   `2 -> 2.3.1`
-
-   `2.3 -> 2.3.1`
-
-90. Build a new distribution/registry image on [Docker hub](https://hub.docker.com/u/distribution/dashboard) by adding a new automated build with the new tag and re-building the images.
-
diff --git a/vendor/github.com/docker/distribution/blobs.go b/vendor/github.com/docker/distribution/blobs.go
index 145b07853..c0e9261be 100644
--- a/vendor/github.com/docker/distribution/blobs.go
+++ b/vendor/github.com/docker/distribution/blobs.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/docker/distribution/reference"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 var (
@@ -66,12 +67,19 @@ type Descriptor struct {
 	Size int64 `json:"size,omitempty"`
 
 	// Digest uniquely identifies the content. A byte stream can be verified
-	// against against this digest.
+	// against this digest.
 	Digest digest.Digest `json:"digest,omitempty"`
 
 	// URLs contains the source URLs of this content.
 	URLs []string `json:"urls,omitempty"`
 
+	// Annotations contains arbitrary metadata relating to the targeted content.
+	Annotations map[string]string `json:"annotations,omitempty"`
+
+	// Platform describes the platform which the image in the manifest runs on.
+	// This should only be used when referring to a manifest.
+	Platform *v1.Platform `json:"platform,omitempty"`
+
 	// NOTE: Before adding a field here, please ensure that all
 	// other options have been exhausted. Much of the type relationships
 	// depend on the simplicity of this type.
diff --git a/vendor/github.com/docker/distribution/circle.yml b/vendor/github.com/docker/distribution/circle.yml
deleted file mode 100644
index ddc76c86c..000000000
--- a/vendor/github.com/docker/distribution/circle.yml
+++ /dev/null
@@ -1,94 +0,0 @@
-# Pony-up!
-machine:
-  pre:
-  # Install gvm
-    - bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/1.0.22/binscripts/gvm-installer)
-  # Install codecov for coverage
-    - pip install --user codecov
-
-  post:
-  # go
-    - gvm install go1.8 --prefer-binary --name=stable
-
-  environment:
-  # Convenient shortcuts to "common" locations
-    CHECKOUT: /home/ubuntu/$CIRCLE_PROJECT_REPONAME
-    BASE_DIR: src/github.com/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME
-  # Trick circle brainflat "no absolute path" behavior
-    BASE_STABLE: ../../../$HOME/.gvm/pkgsets/stable/global/$BASE_DIR
-    DOCKER_BUILDTAGS: "include_oss include_gcs"
-  # Workaround Circle parsing dumb bugs and/or YAML wonkyness
-    CIRCLE_PAIN: "mode: set"
-
-  hosts:
-  # Not used yet
-    fancy: 127.0.0.1
-
-dependencies:
-  pre:
-  # Copy the code to the gopath of all go versions
-    - >
-      gvm use stable &&
-      mkdir -p "$(dirname $BASE_STABLE)" &&
-      cp -R "$CHECKOUT" "$BASE_STABLE"
-
-  override:
-  # Install dependencies for every copied clone/go version
-    - gvm use stable && go get github.com/lk4d4/vndr:
-        pwd: $BASE_STABLE
-
-  post:
-  # For the stable go version, additionally install linting tools
-    - >
-      gvm use stable &&
-      go get github.com/axw/gocov/gocov github.com/golang/lint/golint
-
-test:
-  pre:
-  # Output the go versions we are going to test
-    # - gvm use old && go version
-    - gvm use stable && go version
-
-  # Ensure validation of dependencies
-    - git fetch origin:
-        pwd: $BASE_STABLE
-    - gvm use stable && if test -n "`git diff --stat=1000 origin/master | grep -E \"^[[:space:]]*vendor\"`"; then make dep-validate; fi:
-        pwd: $BASE_STABLE
-
-  # First thing: build everything. This will catch compile errors, and it's
-  # also necessary for go vet to work properly (see #807).
-    - gvm use stable && go install $(go list ./... | grep -v "/vendor/"):
-        pwd: $BASE_STABLE
-
-  # FMT
-    - gvm use stable && make fmt:
-        pwd: $BASE_STABLE
-
-   # VET
-    - gvm use stable && make vet:
-        pwd: $BASE_STABLE
-
-  # LINT
-    - gvm use stable && make lint:
-        pwd: $BASE_STABLE
-
-  override:
-  # Test stable, and report
-     - gvm use stable; export ROOT_PACKAGE=$(go list .); go list -tags "$DOCKER_BUILDTAGS" ./... | grep -v "/vendor/" | xargs -L 1 -I{} bash -c 'export PACKAGE={}; go test -tags "$DOCKER_BUILDTAGS" -test.short -coverprofile=$GOPATH/src/$PACKAGE/coverage.out -coverpkg=$(./coverpkg.sh $PACKAGE $ROOT_PACKAGE) $PACKAGE':
-         timeout: 1000
-         pwd: $BASE_STABLE
-
-  # Test stable with race
-     - gvm use stable; export ROOT_PACKAGE=$(go list .); go list -tags "$DOCKER_BUILDTAGS" ./... | grep -v "/vendor/" | grep -v "registry/handlers" | grep -v "registry/storage/driver" | xargs -L 1 -I{} bash -c 'export PACKAGE={}; go test -race -tags "$DOCKER_BUILDTAGS" -test.short $PACKAGE':
-         timeout: 1000
-         pwd: $BASE_STABLE
-  post:
-  # Report to codecov
-    - bash <(curl -s https://codecov.io/bash):
-        pwd: $BASE_STABLE
-
-  ## Notes
-  # Do we want these as well?
-  # - go get code.google.com/p/go.tools/cmd/goimports
-  # - test -z "$(goimports -l -w ./... | tee /dev/stderr)"
-  # http://labix.org/gocheck
diff --git a/vendor/github.com/docker/distribution/coverpkg.sh b/vendor/github.com/docker/distribution/coverpkg.sh
deleted file mode 100644
index 25d419ae8..000000000
--- a/vendor/github.com/docker/distribution/coverpkg.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-# Given a subpackage and the containing package, figures out which packages
-# need to be passed to `go test -coverpkg`:  this includes all of the
-# subpackage's dependencies within the containing package, as well as the
-# subpackage itself.
-DEPENDENCIES="$(go list -f $'{{range $f := .Deps}}{{$f}}\n{{end}}' ${1} | grep ${2} | grep -v github.com/docker/distribution/vendor)"
-echo "${1} ${DEPENDENCIES}" | xargs echo -n | tr ' ' ','
diff --git a/vendor/github.com/docker/distribution/errors.go b/vendor/github.com/docker/distribution/errors.go
index 020d33258..8e0b788d6 100644
--- a/vendor/github.com/docker/distribution/errors.go
+++ b/vendor/github.com/docker/distribution/errors.go
@@ -20,6 +20,10 @@ var ErrManifestNotModified = errors.New("manifest not modified")
 // performed
 var ErrUnsupported = errors.New("operation unsupported")
 
+// ErrSchemaV1Unsupported is returned when a client tries to upload a schema v1
+// manifest but the registry is configured to reject it
+var ErrSchemaV1Unsupported = errors.New("manifest schema v1 unsupported")
+
 // ErrTagUnknown is returned if the given tag is not known by the tag service
 type ErrTagUnknown struct {
 	Tag string
diff --git a/vendor/github.com/docker/distribution/metrics/prometheus.go b/vendor/github.com/docker/distribution/metrics/prometheus.go
new file mode 100644
index 000000000..b5a532144
--- /dev/null
+++ b/vendor/github.com/docker/distribution/metrics/prometheus.go
@@ -0,0 +1,13 @@
+package metrics
+
+import "github.com/docker/go-metrics"
+
+const (
+	// NamespacePrefix is the namespace of prometheus metrics
+	NamespacePrefix = "registry"
+)
+
+var (
+	// StorageNamespace is the prometheus namespace of blob/cache related operations
+	StorageNamespace = metrics.NewNamespace(NamespacePrefix, "storage", nil)
+)
diff --git a/vendor/github.com/docker/distribution/registry.go b/vendor/github.com/docker/distribution/registry.go
index c34207d03..6c3210989 100644
--- a/vendor/github.com/docker/distribution/registry.go
+++ b/vendor/github.com/docker/distribution/registry.go
@@ -54,6 +54,11 @@ type RepositoryEnumerator interface {
 	Enumerate(ctx context.Context, ingester func(string) error) error
 }
 
+// RepositoryRemover removes given repository
+type RepositoryRemover interface {
+	Remove(ctx context.Context, name reference.Named) error
+}
+
 // ManifestServiceOption is a function argument for Manifest Service methods
 type ManifestServiceOption interface {
 	Apply(ManifestService) error
@@ -73,6 +78,21 @@ func (o WithTagOption) Apply(m ManifestService) error {
 	return nil
 }
 
+// WithManifestMediaTypes lists the media types the client wishes
+// the server to provide.
+func WithManifestMediaTypes(mediaTypes []string) ManifestServiceOption {
+	return WithManifestMediaTypesOption{mediaTypes}
+}
+
+// WithManifestMediaTypesOption holds a list of accepted media types
+type WithManifestMediaTypesOption struct{ MediaTypes []string }
+
+// Apply conforms to the ManifestServiceOption interface
+func (o WithManifestMediaTypesOption) Apply(m ManifestService) error {
+	// no implementation
+	return nil
+}
+
 // Repository is a named collection of manifests and layers.
 type Repository interface {
 	// Named returns the name of the repository.
diff --git a/vendor/github.com/docker/distribution/registry/api/errcode/handler.go b/vendor/github.com/docker/distribution/registry/api/errcode/handler.go
index 49a64a86e..d77e70473 100644
--- a/vendor/github.com/docker/distribution/registry/api/errcode/handler.go
+++ b/vendor/github.com/docker/distribution/registry/api/errcode/handler.go
@@ -36,9 +36,5 @@ func ServeJSON(w http.ResponseWriter, err error) error {
 
 	w.WriteHeader(sc)
 
-	if err := json.NewEncoder(w).Encode(err); err != nil {
-		return err
-	}
-
-	return nil
+	return json.NewEncoder(w).Encode(err)
 }
diff --git a/vendor/github.com/docker/distribution/registry/api/v2/routes.go b/vendor/github.com/docker/distribution/registry/api/v2/routes.go
index 5b80d5be7..9612ac2e5 100644
--- a/vendor/github.com/docker/distribution/registry/api/v2/routes.go
+++ b/vendor/github.com/docker/distribution/registry/api/v2/routes.go
@@ -14,15 +14,6 @@ const (
 	RouteNameCatalog         = "catalog"
 )
 
-var allEndpoints = []string{
-	RouteNameManifest,
-	RouteNameCatalog,
-	RouteNameTags,
-	RouteNameBlob,
-	RouteNameBlobUpload,
-	RouteNameBlobUploadChunk,
-}
-
 // Router builds a gorilla router with named routes for the various API
 // methods. This can be used directly by both server implementations and
 // clients.
diff --git a/vendor/github.com/docker/distribution/registry/client/auth/challenge/authchallenge.go b/vendor/github.com/docker/distribution/registry/client/auth/challenge/authchallenge.go
index c9bdfc355..6e3f1ccc4 100644
--- a/vendor/github.com/docker/distribution/registry/client/auth/challenge/authchallenge.go
+++ b/vendor/github.com/docker/distribution/registry/client/auth/challenge/authchallenge.go
@@ -45,13 +45,13 @@ type Manager interface {
 // to a backend.
 func NewSimpleManager() Manager {
 	return &simpleManager{
-		Challanges: make(map[string][]Challenge),
+		Challenges: make(map[string][]Challenge),
 	}
 }
 
 type simpleManager struct {
 	sync.RWMutex
-	Challanges map[string][]Challenge
+	Challenges map[string][]Challenge
 }
 
 func normalizeURL(endpoint *url.URL) {
@@ -64,7 +64,7 @@ func (m *simpleManager) GetChallenges(endpoint url.URL) ([]Challenge, error) {
 
 	m.RLock()
 	defer m.RUnlock()
-	challenges := m.Challanges[endpoint.String()]
+	challenges := m.Challenges[endpoint.String()]
 	return challenges, nil
 }
 
@@ -82,7 +82,7 @@ func (m *simpleManager) AddResponse(resp *http.Response) error {
 
 	m.Lock()
 	defer m.Unlock()
-	m.Challanges[urlCopy.String()] = challenges
+	m.Challenges[urlCopy.String()] = challenges
 	return nil
 }
 
diff --git a/vendor/github.com/docker/distribution/registry/client/repository.go b/vendor/github.com/docker/distribution/registry/client/repository.go
index 8bd2c3fb6..aa442e654 100644
--- a/vendor/github.com/docker/distribution/registry/client/repository.go
+++ b/vendor/github.com/docker/distribution/registry/client/repository.go
@@ -62,7 +62,7 @@ func checkHTTPRedirect(req *http.Request, via []*http.Request) error {
 }
 
 // NewRegistry creates a registry namespace which can be used to get a listing of repositories
-func NewRegistry(ctx context.Context, baseURL string, transport http.RoundTripper) (Registry, error) {
+func NewRegistry(baseURL string, transport http.RoundTripper) (Registry, error) {
 	ub, err := v2.NewURLBuilderFromString(baseURL, false)
 	if err != nil {
 		return nil, err
@@ -75,16 +75,14 @@ func NewRegistry(ctx context.Context, baseURL string, transport http.RoundTrippe
 	}
 
 	return &registry{
-		client:  client,
-		ub:      ub,
-		context: ctx,
+		client: client,
+		ub:     ub,
 	}, nil
 }
 
 type registry struct {
-	client  *http.Client
-	ub      *v2.URLBuilder
-	context context.Context
+	client *http.Client
+	ub     *v2.URLBuilder
 }
 
 // Repositories returns a lexigraphically sorted catalog given a base URL.  The 'entries' slice will be filled up to the size
@@ -133,7 +131,7 @@ func (r *registry) Repositories(ctx context.Context, entries []string, last stri
 }
 
 // NewRepository creates a new Repository for the given repository name and base URL.
-func NewRepository(ctx context.Context, name reference.Named, baseURL string, transport http.RoundTripper) (distribution.Repository, error) {
+func NewRepository(name reference.Named, baseURL string, transport http.RoundTripper) (distribution.Repository, error) {
 	ub, err := v2.NewURLBuilderFromString(baseURL, false)
 	if err != nil {
 		return nil, err
@@ -146,18 +144,16 @@ func NewRepository(ctx context.Context, name reference.Named, baseURL string, tr
 	}
 
 	return &repository{
-		client:  client,
-		ub:      ub,
-		name:    name,
-		context: ctx,
+		client: client,
+		ub:     ub,
+		name:   name,
 	}, nil
 }
 
 type repository struct {
-	client  *http.Client
-	ub      *v2.URLBuilder
-	context context.Context
-	name    reference.Named
+	client *http.Client
+	ub     *v2.URLBuilder
+	name   reference.Named
 }
 
 func (r *repository) Named() reference.Named {
@@ -190,32 +186,35 @@ func (r *repository) Manifests(ctx context.Context, options ...distribution.Mani
 
 func (r *repository) Tags(ctx context.Context) distribution.TagService {
 	return &tags{
-		client:  r.client,
-		ub:      r.ub,
-		context: r.context,
-		name:    r.Named(),
+		client: r.client,
+		ub:     r.ub,
+		name:   r.Named(),
 	}
 }
 
 // tags implements remote tagging operations.
 type tags struct {
-	client  *http.Client
-	ub      *v2.URLBuilder
-	context context.Context
-	name    reference.Named
+	client *http.Client
+	ub     *v2.URLBuilder
+	name   reference.Named
 }
 
 // All returns all tags
 func (t *tags) All(ctx context.Context) ([]string, error) {
 	var tags []string
 
-	u, err := t.ub.BuildTagsURL(t.name)
+	listURLStr, err := t.ub.BuildTagsURL(t.name)
+	if err != nil {
+		return tags, err
+	}
+
+	listURL, err := url.Parse(listURLStr)
 	if err != nil {
 		return tags, err
 	}
 
 	for {
-		resp, err := t.client.Get(u)
+		resp, err := t.client.Get(listURL.String())
 		if err != nil {
 			return tags, err
 		}
@@ -235,7 +234,13 @@ func (t *tags) All(ctx context.Context) ([]string, error) {
 			}
 			tags = append(tags, tagsResponse.Tags...)
 			if link := resp.Header.Get("Link"); link != "" {
-				u = strings.Trim(strings.Split(link, ";")[0], "<>")
+				linkURLStr := strings.Trim(strings.Split(link, ";")[0], "<>")
+				linkURL, err := url.Parse(linkURLStr)
+				if err != nil {
+					return tags, err
+				}
+
+				listURL = listURL.ResolveReference(linkURL)
 			} else {
 				return tags, nil
 			}
@@ -321,7 +326,8 @@ func (t *tags) Get(ctx context.Context, tag string) (distribution.Descriptor, er
 	defer resp.Body.Close()
 
 	switch {
-	case resp.StatusCode >= 200 && resp.StatusCode < 400:
+	case resp.StatusCode >= 200 && resp.StatusCode < 400 && len(resp.Header.Get("Docker-Content-Digest")) > 0:
+		// if the response is a success AND a Docker-Content-Digest can be retrieved from the headers
 		return descriptorFromResponse(resp)
 	default:
 		// if the response is an error - there will be no body to decode.
@@ -421,18 +427,22 @@ func (ms *manifests) Get(ctx context.Context, dgst digest.Digest, options ...dis
 		ref         reference.Named
 		err         error
 		contentDgst *digest.Digest
+		mediaTypes  []string
 	)
 
 	for _, option := range options {
-		if opt, ok := option.(distribution.WithTagOption); ok {
+		switch opt := option.(type) {
+		case distribution.WithTagOption:
 			digestOrTag = opt.Tag
 			ref, err = reference.WithTag(ms.name, opt.Tag)
 			if err != nil {
 				return nil, err
 			}
-		} else if opt, ok := option.(contentDigestOption); ok {
+		case contentDigestOption:
 			contentDgst = opt.digest
-		} else {
+		case distribution.WithManifestMediaTypesOption:
+			mediaTypes = opt.MediaTypes
+		default:
 			err := option.Apply(ms)
 			if err != nil {
 				return nil, err
@@ -448,6 +458,10 @@ func (ms *manifests) Get(ctx context.Context, dgst digest.Digest, options ...dis
 		}
 	}
 
+	if len(mediaTypes) == 0 {
+		mediaTypes = distribution.ManifestMediaTypes()
+	}
+
 	u, err := ms.ub.BuildManifestURL(ref)
 	if err != nil {
 		return nil, err
@@ -458,7 +472,7 @@ func (ms *manifests) Get(ctx context.Context, dgst digest.Digest, options ...dis
 		return nil, err
 	}
 
-	for _, t := range distribution.ManifestMediaTypes() {
+	for _, t := range mediaTypes {
 		req.Header.Add("Accept", t)
 	}
 
diff --git a/vendor/github.com/docker/distribution/registry/client/transport/http_reader.go b/vendor/github.com/docker/distribution/registry/client/transport/http_reader.go
index e5ff09d75..1d0b382fb 100644
--- a/vendor/github.com/docker/distribution/registry/client/transport/http_reader.go
+++ b/vendor/github.com/docker/distribution/registry/client/transport/http_reader.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"os"
 	"regexp"
 	"strconv"
 )
@@ -97,7 +96,7 @@ func (hrs *httpReadSeeker) Seek(offset int64, whence int) (int64, error) {
 
 	lastReaderOffset := hrs.readerOffset
 
-	if whence == os.SEEK_SET && hrs.rc == nil {
+	if whence == io.SeekStart && hrs.rc == nil {
 		// If no request has been made yet, and we are seeking to an
 		// absolute position, set the read offset as well to avoid an
 		// unnecessary request.
@@ -113,14 +112,14 @@ func (hrs *httpReadSeeker) Seek(offset int64, whence int) (int64, error) {
 	newOffset := hrs.seekOffset
 
 	switch whence {
-	case os.SEEK_CUR:
+	case io.SeekCurrent:
 		newOffset += offset
-	case os.SEEK_END:
+	case io.SeekEnd:
 		if hrs.size < 0 {
 			return 0, errors.New("content length not known")
 		}
 		newOffset = hrs.size + offset
-	case os.SEEK_SET:
+	case io.SeekStart:
 		newOffset = offset
 	}
 
diff --git a/vendor/github.com/docker/distribution/registry/storage/cache/cachedblobdescriptorstore.go b/vendor/github.com/docker/distribution/registry/storage/cache/cachedblobdescriptorstore.go
index cdc34f5fe..ac4c45211 100644
--- a/vendor/github.com/docker/distribution/registry/storage/cache/cachedblobdescriptorstore.go
+++ b/vendor/github.com/docker/distribution/registry/storage/cache/cachedblobdescriptorstore.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/docker/distribution"
+	prometheus "github.com/docker/distribution/metrics"
 	"github.com/opencontainers/go-digest"
 )
 
@@ -38,6 +39,11 @@ type cachedBlobStatter struct {
 	tracker MetricsTracker
 }
 
+var (
+	// cacheCount is the number of total cache request received/hits/misses
+	cacheCount = prometheus.StorageNamespace.NewLabeledCounter("cache", "The number of cache request received", "type")
+)
+
 // NewCachedBlobStatter creates a new statter which prefers a cache and
 // falls back to a backend.
 func NewCachedBlobStatter(cache distribution.BlobDescriptorService, backend distribution.BlobDescriptorService) distribution.BlobDescriptorService {
@@ -58,6 +64,7 @@ func NewCachedBlobStatterWithMetrics(cache distribution.BlobDescriptorService, b
 }
 
 func (cbds *cachedBlobStatter) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
+	cacheCount.WithValues("Request").Inc(1)
 	desc, err := cbds.cache.Stat(ctx, dgst)
 	if err != nil {
 		if err != distribution.ErrBlobUnknown {
@@ -66,12 +73,13 @@ func (cbds *cachedBlobStatter) Stat(ctx context.Context, dgst digest.Digest) (di
 
 		goto fallback
 	}
-
+	cacheCount.WithValues("Hit").Inc(1)
 	if cbds.tracker != nil {
 		cbds.tracker.Hit()
 	}
 	return desc, nil
 fallback:
+	cacheCount.WithValues("Miss").Inc(1)
 	if cbds.tracker != nil {
 		cbds.tracker.Miss()
 	}
diff --git a/vendor/github.com/docker/distribution/vendor.conf b/vendor/github.com/docker/distribution/vendor.conf
index d67edd779..a249caf26 100644
--- a/vendor/github.com/docker/distribution/vendor.conf
+++ b/vendor/github.com/docker/distribution/vendor.conf
@@ -1,29 +1,36 @@
-github.com/Azure/azure-sdk-for-go 088007b3b08cc02b27f2eadfdcd870958460ce7e
-github.com/Azure/go-autorest ec5f4903f77ed9927ac95b19ab8e44ada64c1356
+github.com/Azure/azure-sdk-for-go 4650843026a7fdec254a8d9cf893693a254edd0b
+github.com/Azure/go-autorest eaa7994b2278094c904d31993d26f56324db3052
 github.com/sirupsen/logrus 3d4380f53a34dcdc95f0c1db702615992b38d9a4
-github.com/aws/aws-sdk-go c6fc52983ea2375810aa38ddb5370e9cdf611716
+github.com/aws/aws-sdk-go f831d5a0822a1ad72420ab18c6269bca1ddaf490
 github.com/bshuster-repo/logrus-logstash-hook d2c0ecc1836d91814e15e23bb5dc309c3ef51f4a
+github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
 github.com/bugsnag/bugsnag-go b1d153021fcd90ca3f080db36bec96dc690fb274
 github.com/bugsnag/osext 0dd3f918b21bec95ace9dc86c7e70266cfc5c702
 github.com/bugsnag/panicwrap e2c28503fcd0675329da73bf48b33404db873782
 github.com/denverdino/aliyungo afedced274aa9a7fcdd47ac97018f0f8db4e5de2
 github.com/dgrijalva/jwt-go a601269ab70c205d26370c16f7c81e9017c14e04
-github.com/docker/goamz f0a21f5b2e12f83a505ecf79b633bb2035cf6f85
+github.com/docker/go-metrics 399ea8c73916000c64c2c76e8da00ca82f8387ab
 github.com/docker/libtrust fa567046d9b14f6aa788882a950d69651d230b21
 github.com/garyburd/redigo 535138d7bcd717d6531c701ef5933d98b1866257
 github.com/go-ini/ini 2ba15ac2dc9cdf88c110ec2dc0ced7fa45f5678c
 github.com/golang/protobuf 8d92cf5fc15a4382f8964b08e1f42a75c0591aa3
-github.com/gorilla/context 14f550f51af52180c2eefed15e5fd18d63c0a64a
 github.com/gorilla/handlers 60c7bfde3e33c201519a200a4507a158cc03a17b
 github.com/gorilla/mux 599cba5e7b6137d46ddf58fb1765f5d928e69604
 github.com/inconshreveable/mousetrap 76626ae9c91c4f2a10f34cad8ce83ea42c93bb75
 github.com/jmespath/go-jmespath bd40a432e4c76585ef6b72d3fd96fb9b6dc7b68d
+github.com/marstr/guid 8bd9a64bf37eb297b492a4101fb28e80ac0b290f
+github.com/satori/go.uuid f58768cc1a7a7e77a3bd49e98cdd21419399b6a3
+github.com/matttproud/golang_protobuf_extensions c12348ce28de40eed0136aa2b644d0ee0650e56c
 github.com/miekg/dns 271c58e0c14f552178ea321a545ff9af38930f39
 github.com/mitchellh/mapstructure 482a9fd5fa83e8c4e7817413b80f3eb8feec03ef
-github.com/ncw/swift b964f2ca856aac39885e258ad25aec08d5f64ee6
+github.com/ncw/swift a0320860b16212c2b59b4912bb6508cda1d7cee6
+github.com/prometheus/client_golang c332b6f63c0658a65eca15c0e5247ded801cf564
+github.com/prometheus/client_model 99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c
+github.com/prometheus/common 89604d197083d4781071d3c65855d24ecfb0a563
+github.com/prometheus/procfs cb4147076ac75738c9a7d279075a253c0cc5acbd
+github.com/Shopify/logrus-bugsnag 577dee27f20dd8f1a529f82210094af593be12bd
 github.com/spf13/cobra 312092086bed4968099259622145a0c9ae280064
 github.com/spf13/pflag 5644820622454e71517561946e3d94b9f9db6842
-github.com/stevvooe/resumable 2aaf90b2ceea5072cb503ef2a620b08ff3119870
 github.com/xenolf/lego a9d8cec0e6563575e5868a005359ac97911b5985
 github.com/yvasiyarov/go-metrics 57bccd1ccd43f94bb17fdd8bf3007059b802f85e
 github.com/yvasiyarov/gorelic a9bba5b9ab508a086f9a12b8c51fab68478e2128
@@ -38,6 +45,7 @@ google.golang.org/cloud 975617b05ea8a58727e6c1a06b6161ff4185a9f2
 google.golang.org/grpc d3ddb4469d5a1b949fc7a7da7c1d6a0d1b6de994
 gopkg.in/check.v1 64131543e7896d5bcc6bd5a76287eb75ea96c673
 gopkg.in/square/go-jose.v1 40d457b439244b546f023d056628e5184136899b
-gopkg.in/yaml.v2 bef53efd0c76e49e6de55ead051f886bea7e9420
+gopkg.in/yaml.v2 v2.2.1
 rsc.io/letsencrypt e770c10b0f1a64775ae91d240407ce00d1a5bdeb https://github.com/dmcgowan/letsencrypt.git
 github.com/opencontainers/go-digest a6d0ee40d4207ea02364bd3b9e8e77b9159ba1eb
+github.com/opencontainers/image-spec ab7389ef9f50030c9b245bc16b981c7ddf192882
diff --git a/vendor/github.com/docker/docker-credential-helpers/credentials/version.go b/vendor/github.com/docker/docker-credential-helpers/credentials/version.go
index 033a5fee5..ecc23e68b 100644
--- a/vendor/github.com/docker/docker-credential-helpers/credentials/version.go
+++ b/vendor/github.com/docker/docker-credential-helpers/credentials/version.go
@@ -1,4 +1,4 @@
 package credentials
 
 // Version holds a string describing the current version
-const Version = "0.6.0"
+const Version = "0.6.2"
diff --git a/vendor/github.com/docker/go-metrics/CONTRIBUTING.md b/vendor/github.com/docker/go-metrics/CONTRIBUTING.md
new file mode 100644
index 000000000..b8a512c36
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/CONTRIBUTING.md
@@ -0,0 +1,55 @@
+# Contributing
+
+## Sign your work
+
+The sign-off is a simple line at the end of the explanation for the patch. Your
+signature certifies that you wrote the patch or otherwise have the right to pass
+it on as an open-source patch. The rules are pretty simple: if you can certify
+the below (from [developercertificate.org](http://developercertificate.org/)):
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+Then you just add a line to every git commit message:
+
+    Signed-off-by: Joe Smith <joe.smith@email.com>
+
+Use your real name (sorry, no pseudonyms or anonymous contributions.)
+
+If you set your `user.name` and `user.email` git configs, you can sign your
+commit automatically with `git commit -s`.
diff --git a/vendor/github.com/docker/go-metrics/LICENSE b/vendor/github.com/docker/go-metrics/LICENSE
new file mode 100644
index 000000000..8f3fee627
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/LICENSE
@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        https://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
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+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2013-2016 Docker, Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/docker/go-metrics/LICENSE.docs b/vendor/github.com/docker/go-metrics/LICENSE.docs
new file mode 100644
index 000000000..e26cd4fc8
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/LICENSE.docs
@@ -0,0 +1,425 @@
+Attribution-ShareAlike 4.0 International
+
+=======================================================================
+
+Creative Commons Corporation ("Creative Commons") is not a law firm and
+does not provide legal services or legal advice. Distribution of
+Creative Commons public licenses does not create a lawyer-client or
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+fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and
+conditions that creators and other rights holders may use to share
+original works of authorship and other material subject to copyright
+and certain other rights specified in the public license below. The
+following considerations are for informational purposes only, are not
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+
+     Considerations for licensors: Our public licenses are
+     intended for use by those authorized to give the public
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+
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+     copyright--then that use is not regulated by the license. Our
+     licenses grant only permissions under copyright and certain
+     other rights that a licensor has authority to grant. Use of
+     the licensed material may still be restricted for other
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+     such as asking that all changes be marked or described.
+     Although not required by our licenses, you are encouraged to
+     respect those requests where reasonable. More_considerations
+     for the public:
+	wiki.creativecommons.org/Considerations_for_licensees
+
+=======================================================================
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+License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution-ShareAlike 4.0 International Public License ("Public
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+
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+Section 2 -- Scope.
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+          Exceptions and Limitations apply to Your use, this Public
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+          6(a).
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+            a. Offer from the Licensor -- Licensed Material. Every
+               recipient of the Licensed Material automatically
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+               exercise the Licensed Rights in the Adapted Material
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+
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+               any additional or different terms or conditions on, or
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+               Licensed Material if doing so restricts exercise of the
+               Licensed Rights by any recipient of the Licensed
+               Material.
+
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+          may be construed as permission to assert or imply that You
+          are, or that Your use of the Licensed Material is, connected
+          with, or sponsored, endorsed, or granted official status by,
+          the Licensor or others designated to receive attribution as
+          provided in Section 3(a)(1)(A)(i).
+
+  b. Other rights.
+
+       1. Moral rights, such as the right of integrity, are not
+          licensed under this Public License, nor are publicity,
+          privacy, and/or other similar personality rights; however, to
+          the extent possible, the Licensor waives and/or agrees not to
+          assert any such rights held by the Licensor to the limited
+          extent necessary to allow You to exercise the Licensed
+          Rights, but not otherwise.
+
+       2. Patent and trademark rights are not licensed under this
+          Public License.
+
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+          collect royalties from You for the exercise of the Licensed
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+          under any voluntary or waivable statutory or compulsory
+          licensing scheme. In all other cases the Licensor expressly
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+
+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
+following conditions.
+
+  a. Attribution.
+
+       1. If You Share the Licensed Material (including in modified
+          form), You must:
+
+            a. retain the following if it is supplied by the Licensor
+               with the Licensed Material:
+
+                 i. identification of the creator(s) of the Licensed
+                    Material and any others designated to receive
+                    attribution, in any reasonable manner requested by
+                    the Licensor (including by pseudonym if
+                    designated);
+
+                ii. a copyright notice;
+
+               iii. a notice that refers to this Public License;
+
+                iv. a notice that refers to the disclaimer of
+                    warranties;
+
+                 v. a URI or hyperlink to the Licensed Material to the
+                    extent reasonably practicable;
+
+            b. indicate if You modified the Licensed Material and
+               retain an indication of any previous modifications; and
+
+            c. indicate the Licensed Material is licensed under this
+               Public License, and include the text of, or the URI or
+               hyperlink to, this Public License.
+
+       2. You may satisfy the conditions in Section 3(a)(1) in any
+          reasonable manner based on the medium, means, and context in
+          which You Share the Licensed Material. For example, it may be
+          reasonable to satisfy the conditions by providing a URI or
+          hyperlink to a resource that includes the required
+          information.
+
+       3. If requested by the Licensor, You must remove any of the
+          information required by Section 3(a)(1)(A) to the extent
+          reasonably practicable.
+
+  b. ShareAlike.
+
+     In addition to the conditions in Section 3(a), if You Share
+     Adapted Material You produce, the following conditions also apply.
+
+       1. The Adapter's License You apply must be a Creative Commons
+          license with the same License Elements, this version or
+          later, or a BY-SA Compatible License.
+
+       2. You must include the text of, or the URI or hyperlink to, the
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+          in any reasonable manner based on the medium, means, and
+          context in which You Share Adapted Material.
+
+       3. You may not offer or impose any additional or different terms
+          or conditions on, or apply any Effective Technological
+          Measures to, Adapted Material that restrict exercise of the
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+Section 4 -- Sui Generis Database Rights.
+
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+
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+
+  b. if You include all or a substantial portion of the database
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+
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+  c. You must comply with the conditions in Section 3(a) if You Share
+     all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not
+replace Your obligations under this Public License where the Licensed
+Rights include other Copyright and Similar Rights.
+
+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
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+
+
+Section 6 -- Term and Termination.
+
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+     terminate automatically.
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+
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+          it is cured within 30 days of Your discovery of the
+          violation; or
+
+       2. upon express reinstatement by the Licensor.
+
+     For the avoidance of doubt, this Section 6(b) does not affect any
+     right the Licensor may have to seek remedies for Your violations
+     of this Public License.
+
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+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
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+     License.
+
+
+Section 7 -- Other Terms and Conditions.
+
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+     terms or conditions communicated by You unless expressly agreed.
+
+  b. Any arrangements, understandings, or agreements regarding the
+     Licensed Material not stated herein are separate from and
+     independent of the terms and conditions of this Public License.
+
+
+Section 8 -- Interpretation.
+
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+     shall not be interpreted to, reduce, limit, restrict, or impose
+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
+     minimum extent necessary to make it enforceable. If the provision
+     cannot be reformed, it shall be severed from this Public License
+     without affecting the enforceability of the remaining terms and
+     conditions.
+
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+     failure to comply consented to unless expressly agreed to by the
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+
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+     as a limitation upon, or waiver of, any privileges and immunities
+     that apply to the Licensor or You, including from the legal
+     processes of any jurisdiction or authority.
+
+
+=======================================================================
+
+Creative Commons is not a party to its public licenses.
+Notwithstanding, Creative Commons may elect to apply one of its public
+licenses to material it publishes and in those instances will be
+considered the "Licensor." Except for the limited purpose of indicating
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+licenses.
+
+Creative Commons may be contacted at creativecommons.org.
diff --git a/vendor/github.com/docker/go-metrics/NOTICE b/vendor/github.com/docker/go-metrics/NOTICE
new file mode 100644
index 000000000..8915f0277
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/NOTICE
@@ -0,0 +1,16 @@
+Docker
+Copyright 2012-2015 Docker, Inc.
+
+This product includes software developed at Docker, Inc. (https://www.docker.com).
+
+The following is courtesy of our legal counsel:
+
+
+Use and transfer of Docker may be subject to certain restrictions by the
+United States and other governments.
+It is your responsibility to ensure that your use and/or transfer does not
+violate applicable laws.
+
+For more information, please see https://www.bis.doc.gov
+
+See also https://www.apache.org/dev/crypto.html and/or seek legal counsel.
diff --git a/vendor/github.com/docker/go-metrics/README.md b/vendor/github.com/docker/go-metrics/README.md
new file mode 100644
index 000000000..a9e947cb5
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/README.md
@@ -0,0 +1,91 @@
+# go-metrics [![GoDoc](https://godoc.org/github.com/docker/go-metrics?status.svg)](https://godoc.org/github.com/docker/go-metrics) ![Badge Badge](http://doyouevenbadge.com/github.com/docker/go-metrics)
+
+This package is small wrapper around the prometheus go client to help enforce convention and best practices for metrics collection in Docker projects.
+
+## Best Practices
+
+This packages is meant to be used for collecting metrics in Docker projects.
+It is not meant to be used as a replacement for the prometheus client but to help enforce consistent naming across metrics collected.
+If you have not already read the prometheus best practices around naming and labels you can read the page [here](https://prometheus.io/docs/practices/naming/).
+
+The following are a few Docker specific rules that will help you name and work with metrics in your project.
+
+1. Namespace and Subsystem
+
+This package provides you with a namespace type that allows you to specify the same namespace and subsystem for your metrics.
+
+```go
+ns := metrics.NewNamespace("engine", "daemon", metrics.Labels{
+        "version": dockerversion.Version,
+        "commit":  dockerversion.GitCommit,
+})
+```
+
+In the example above we are creating metrics for the Docker engine's daemon package.
+`engine` would be the namespace in this example where `daemon` is the subsystem or package where we are collecting the metrics.
+
+A namespace also allows you to attach constant labels to the metrics such as the git commit and version that it is collecting.
+
+2. Declaring your Metrics
+
+Try to keep all your metric declarations in one file.
+This makes it easy for others to see what constant labels are defined on the namespace and what labels are defined on the metrics when they are created.
+
+3. Use labels instead of multiple metrics
+
+Labels allow you to define one metric such as the time it takes to perform a certain action on an object.
+If we wanted to collect timings on various container actions such as create, start, and delete then we can define one metric called `container_actions` and use labels to specify the type of action.
+
+
+```go
+containerActions = ns.NewLabeledTimer("container_actions", "The number of milliseconds it takes to process each container action", "action")
+```
+
+The last parameter is the label name or key.
+When adding a data point to the metric you will use the `WithValues` function to specify the `action` that you are collecting for.
+
+```go
+containerActions.WithValues("create").UpdateSince(start)
+```
+
+4. Always use a unit
+
+The metric name should describe what you are measuring but you also need to provide the unit that it is being measured with.
+For a timer, the standard unit is seconds and a counter's standard unit is a total.
+For gauges you must provide the unit.
+This package provides a standard set of units for use within the Docker projects.
+
+```go
+Nanoseconds Unit = "nanoseconds"
+Seconds     Unit = "seconds"
+Bytes       Unit = "bytes"
+Total       Unit = "total"
+```
+
+If you need to use a unit but it is not defined in the package please open a PR to add it but first try to see if one of the already created units will work for your metric, i.e. seconds or nanoseconds vs adding milliseconds.
+
+## Docs
+
+Package documentation can be found [here](https://godoc.org/github.com/docker/go-metrics).
+
+## HTTP Metrics
+
+To instrument a http handler, you can wrap the code like this:
+
+```go
+namespace := metrics.NewNamespace("docker_distribution", "http", metrics.Labels{"handler": "your_http_handler_name"})
+httpMetrics := namespace.NewDefaultHttpMetrics()
+metrics.Register(namespace)
+instrumentedHandler = metrics.InstrumentHandler(httpMetrics, unInstrumentedHandler)
+```
+Note: The `handler` label must be provided when a new namespace is created.
+
+## Additional Metrics
+
+Additional metrics are also defined here that are not available in the prometheus client.
+If you need a custom metrics and it is generic enough to be used by multiple projects, define it here.
+
+
+## Copyright and license
+
+Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.
diff --git a/vendor/github.com/docker/go-metrics/counter.go b/vendor/github.com/docker/go-metrics/counter.go
new file mode 100644
index 000000000..fe36316a4
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/counter.go
@@ -0,0 +1,52 @@
+package metrics
+
+import "github.com/prometheus/client_golang/prometheus"
+
+// Counter is a metrics that can only increment its current count
+type Counter interface {
+	// Inc adds Sum(vs) to the counter. Sum(vs) must be positive.
+	//
+	// If len(vs) == 0, increments the counter by 1.
+	Inc(vs ...float64)
+}
+
+// LabeledCounter is counter that must have labels populated before use.
+type LabeledCounter interface {
+	WithValues(vs ...string) Counter
+}
+
+type labeledCounter struct {
+	pc *prometheus.CounterVec
+}
+
+func (lc *labeledCounter) WithValues(vs ...string) Counter {
+	return &counter{pc: lc.pc.WithLabelValues(vs...)}
+}
+
+func (lc *labeledCounter) Describe(ch chan<- *prometheus.Desc) {
+	lc.pc.Describe(ch)
+}
+
+func (lc *labeledCounter) Collect(ch chan<- prometheus.Metric) {
+	lc.pc.Collect(ch)
+}
+
+type counter struct {
+	pc prometheus.Counter
+}
+
+func (c *counter) Inc(vs ...float64) {
+	if len(vs) == 0 {
+		c.pc.Inc()
+	}
+
+	c.pc.Add(sumFloat64(vs...))
+}
+
+func (c *counter) Describe(ch chan<- *prometheus.Desc) {
+	c.pc.Describe(ch)
+}
+
+func (c *counter) Collect(ch chan<- prometheus.Metric) {
+	c.pc.Collect(ch)
+}
diff --git a/vendor/github.com/docker/go-metrics/docs.go b/vendor/github.com/docker/go-metrics/docs.go
new file mode 100644
index 000000000..8fbdfc697
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/docs.go
@@ -0,0 +1,3 @@
+// This package is small wrapper around the prometheus go client to help enforce convention and best practices for metrics collection in Docker projects.
+
+package metrics
diff --git a/vendor/github.com/docker/go-metrics/gauge.go b/vendor/github.com/docker/go-metrics/gauge.go
new file mode 100644
index 000000000..74296e877
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/gauge.go
@@ -0,0 +1,72 @@
+package metrics
+
+import "github.com/prometheus/client_golang/prometheus"
+
+// Gauge is a metric that allows incrementing and decrementing a value
+type Gauge interface {
+	Inc(...float64)
+	Dec(...float64)
+
+	// Add adds the provided value to the gauge's current value
+	Add(float64)
+
+	// Set replaces the gauge's current value with the provided value
+	Set(float64)
+}
+
+// LabeledGauge describes a gauge the must have values populated before use.
+type LabeledGauge interface {
+	WithValues(labels ...string) Gauge
+}
+
+type labeledGauge struct {
+	pg *prometheus.GaugeVec
+}
+
+func (lg *labeledGauge) WithValues(labels ...string) Gauge {
+	return &gauge{pg: lg.pg.WithLabelValues(labels...)}
+}
+
+func (lg *labeledGauge) Describe(c chan<- *prometheus.Desc) {
+	lg.pg.Describe(c)
+}
+
+func (lg *labeledGauge) Collect(c chan<- prometheus.Metric) {
+	lg.pg.Collect(c)
+}
+
+type gauge struct {
+	pg prometheus.Gauge
+}
+
+func (g *gauge) Inc(vs ...float64) {
+	if len(vs) == 0 {
+		g.pg.Inc()
+	}
+
+	g.Add(sumFloat64(vs...))
+}
+
+func (g *gauge) Dec(vs ...float64) {
+	if len(vs) == 0 {
+		g.pg.Dec()
+	}
+
+	g.Add(-sumFloat64(vs...))
+}
+
+func (g *gauge) Add(v float64) {
+	g.pg.Add(v)
+}
+
+func (g *gauge) Set(v float64) {
+	g.pg.Set(v)
+}
+
+func (g *gauge) Describe(c chan<- *prometheus.Desc) {
+	g.pg.Describe(c)
+}
+
+func (g *gauge) Collect(c chan<- prometheus.Metric) {
+	g.pg.Collect(c)
+}
diff --git a/vendor/github.com/docker/go-metrics/handler.go b/vendor/github.com/docker/go-metrics/handler.go
new file mode 100644
index 000000000..05601e9ec
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/handler.go
@@ -0,0 +1,74 @@
+package metrics
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+// HTTPHandlerOpts describes a set of configurable options of http metrics
+type HTTPHandlerOpts struct {
+	DurationBuckets     []float64
+	RequestSizeBuckets  []float64
+	ResponseSizeBuckets []float64
+}
+
+const (
+	InstrumentHandlerResponseSize = iota
+	InstrumentHandlerRequestSize
+	InstrumentHandlerDuration
+	InstrumentHandlerCounter
+	InstrumentHandlerInFlight
+)
+
+type HTTPMetric struct {
+	prometheus.Collector
+	handlerType int
+}
+
+var (
+	defaultDurationBuckets     = []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10, 25, 60}
+	defaultRequestSizeBuckets  = prometheus.ExponentialBuckets(1024, 2, 22) //1K to 4G
+	defaultResponseSizeBuckets = defaultRequestSizeBuckets
+)
+
+// Handler returns the global http.Handler that provides the prometheus
+// metrics format on GET requests. This handler is no longer instrumented.
+func Handler() http.Handler {
+	return promhttp.Handler()
+}
+
+func InstrumentHandler(metrics []*HTTPMetric, handler http.Handler) http.HandlerFunc {
+	return InstrumentHandlerFunc(metrics, handler.ServeHTTP)
+}
+
+func InstrumentHandlerFunc(metrics []*HTTPMetric, handlerFunc http.HandlerFunc) http.HandlerFunc {
+	var handler http.Handler
+	handler = http.HandlerFunc(handlerFunc)
+	for _, metric := range metrics {
+		switch metric.handlerType {
+		case InstrumentHandlerResponseSize:
+			if collector, ok := metric.Collector.(prometheus.ObserverVec); ok {
+				handler = promhttp.InstrumentHandlerResponseSize(collector, handler)
+			}
+		case InstrumentHandlerRequestSize:
+			if collector, ok := metric.Collector.(prometheus.ObserverVec); ok {
+				handler = promhttp.InstrumentHandlerRequestSize(collector, handler)
+			}
+		case InstrumentHandlerDuration:
+			if collector, ok := metric.Collector.(prometheus.ObserverVec); ok {
+				handler = promhttp.InstrumentHandlerDuration(collector, handler)
+			}
+		case InstrumentHandlerCounter:
+			if collector, ok := metric.Collector.(*prometheus.CounterVec); ok {
+				handler = promhttp.InstrumentHandlerCounter(collector, handler)
+			}
+		case InstrumentHandlerInFlight:
+			if collector, ok := metric.Collector.(prometheus.Gauge); ok {
+				handler = promhttp.InstrumentHandlerInFlight(collector, handler)
+			}
+		}
+	}
+	return handler.ServeHTTP
+}
diff --git a/vendor/github.com/docker/go-metrics/helpers.go b/vendor/github.com/docker/go-metrics/helpers.go
new file mode 100644
index 000000000..68b7f51b3
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/helpers.go
@@ -0,0 +1,10 @@
+package metrics
+
+func sumFloat64(vs ...float64) float64 {
+	var sum float64
+	for _, v := range vs {
+		sum += v
+	}
+
+	return sum
+}
diff --git a/vendor/github.com/docker/go-metrics/namespace.go b/vendor/github.com/docker/go-metrics/namespace.go
new file mode 100644
index 000000000..798315451
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/namespace.go
@@ -0,0 +1,315 @@
+package metrics
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type Labels map[string]string
+
+// NewNamespace returns a namespaces that is responsible for managing a collection of
+// metrics for a particual namespace and subsystem
+//
+// labels allows const labels to be added to all metrics created in this namespace
+// and are commonly used for data like application version and git commit
+func NewNamespace(name, subsystem string, labels Labels) *Namespace {
+	if labels == nil {
+		labels = make(map[string]string)
+	}
+	return &Namespace{
+		name:      name,
+		subsystem: subsystem,
+		labels:    labels,
+	}
+}
+
+// Namespace describes a set of metrics that share a namespace and subsystem.
+type Namespace struct {
+	name      string
+	subsystem string
+	labels    Labels
+	mu        sync.Mutex
+	metrics   []prometheus.Collector
+}
+
+// WithConstLabels returns a namespace with the provided set of labels merged
+// with the existing constant labels on the namespace.
+//
+//  Only metrics created with the returned namespace will get the new constant
+//  labels.  The returned namespace must be registered separately.
+func (n *Namespace) WithConstLabels(labels Labels) *Namespace {
+	n.mu.Lock()
+	ns := &Namespace{
+		name:      n.name,
+		subsystem: n.subsystem,
+		labels:    mergeLabels(n.labels, labels),
+	}
+	n.mu.Unlock()
+	return ns
+}
+
+func (n *Namespace) NewCounter(name, help string) Counter {
+	c := &counter{pc: prometheus.NewCounter(n.newCounterOpts(name, help))}
+	n.Add(c)
+	return c
+}
+
+func (n *Namespace) NewLabeledCounter(name, help string, labels ...string) LabeledCounter {
+	c := &labeledCounter{pc: prometheus.NewCounterVec(n.newCounterOpts(name, help), labels)}
+	n.Add(c)
+	return c
+}
+
+func (n *Namespace) newCounterOpts(name, help string) prometheus.CounterOpts {
+	return prometheus.CounterOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        makeName(name, Total),
+		Help:        help,
+		ConstLabels: prometheus.Labels(n.labels),
+	}
+}
+
+func (n *Namespace) NewTimer(name, help string) Timer {
+	t := &timer{
+		m: prometheus.NewHistogram(n.newTimerOpts(name, help)),
+	}
+	n.Add(t)
+	return t
+}
+
+func (n *Namespace) NewLabeledTimer(name, help string, labels ...string) LabeledTimer {
+	t := &labeledTimer{
+		m: prometheus.NewHistogramVec(n.newTimerOpts(name, help), labels),
+	}
+	n.Add(t)
+	return t
+}
+
+func (n *Namespace) newTimerOpts(name, help string) prometheus.HistogramOpts {
+	return prometheus.HistogramOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        makeName(name, Seconds),
+		Help:        help,
+		ConstLabels: prometheus.Labels(n.labels),
+	}
+}
+
+func (n *Namespace) NewGauge(name, help string, unit Unit) Gauge {
+	g := &gauge{
+		pg: prometheus.NewGauge(n.newGaugeOpts(name, help, unit)),
+	}
+	n.Add(g)
+	return g
+}
+
+func (n *Namespace) NewLabeledGauge(name, help string, unit Unit, labels ...string) LabeledGauge {
+	g := &labeledGauge{
+		pg: prometheus.NewGaugeVec(n.newGaugeOpts(name, help, unit), labels),
+	}
+	n.Add(g)
+	return g
+}
+
+func (n *Namespace) newGaugeOpts(name, help string, unit Unit) prometheus.GaugeOpts {
+	return prometheus.GaugeOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        makeName(name, unit),
+		Help:        help,
+		ConstLabels: prometheus.Labels(n.labels),
+	}
+}
+
+func (n *Namespace) Describe(ch chan<- *prometheus.Desc) {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+
+	for _, metric := range n.metrics {
+		metric.Describe(ch)
+	}
+}
+
+func (n *Namespace) Collect(ch chan<- prometheus.Metric) {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+
+	for _, metric := range n.metrics {
+		metric.Collect(ch)
+	}
+}
+
+func (n *Namespace) Add(collector prometheus.Collector) {
+	n.mu.Lock()
+	n.metrics = append(n.metrics, collector)
+	n.mu.Unlock()
+}
+
+func (n *Namespace) NewDesc(name, help string, unit Unit, labels ...string) *prometheus.Desc {
+	name = makeName(name, unit)
+	namespace := n.name
+	if n.subsystem != "" {
+		namespace = fmt.Sprintf("%s_%s", namespace, n.subsystem)
+	}
+	name = fmt.Sprintf("%s_%s", namespace, name)
+	return prometheus.NewDesc(name, help, labels, prometheus.Labels(n.labels))
+}
+
+// mergeLabels merges two or more labels objects into a single map, favoring
+// the later labels.
+func mergeLabels(lbs ...Labels) Labels {
+	merged := make(Labels)
+
+	for _, target := range lbs {
+		for k, v := range target {
+			merged[k] = v
+		}
+	}
+
+	return merged
+}
+
+func makeName(name string, unit Unit) string {
+	if unit == "" {
+		return name
+	}
+
+	return fmt.Sprintf("%s_%s", name, unit)
+}
+
+func (n *Namespace) NewDefaultHttpMetrics(handlerName string) []*HTTPMetric {
+	return n.NewHttpMetricsWithOpts(handlerName, HTTPHandlerOpts{
+		DurationBuckets:     defaultDurationBuckets,
+		RequestSizeBuckets:  defaultResponseSizeBuckets,
+		ResponseSizeBuckets: defaultResponseSizeBuckets,
+	})
+}
+
+func (n *Namespace) NewHttpMetrics(handlerName string, durationBuckets, requestSizeBuckets, responseSizeBuckets []float64) []*HTTPMetric {
+	return n.NewHttpMetricsWithOpts(handlerName, HTTPHandlerOpts{
+		DurationBuckets:     durationBuckets,
+		RequestSizeBuckets:  requestSizeBuckets,
+		ResponseSizeBuckets: responseSizeBuckets,
+	})
+}
+
+func (n *Namespace) NewHttpMetricsWithOpts(handlerName string, opts HTTPHandlerOpts) []*HTTPMetric {
+	var httpMetrics []*HTTPMetric
+	inFlightMetric := n.NewInFlightGaugeMetric(handlerName)
+	requestTotalMetric := n.NewRequestTotalMetric(handlerName)
+	requestDurationMetric := n.NewRequestDurationMetric(handlerName, opts.DurationBuckets)
+	requestSizeMetric := n.NewRequestSizeMetric(handlerName, opts.RequestSizeBuckets)
+	responseSizeMetric := n.NewResponseSizeMetric(handlerName, opts.ResponseSizeBuckets)
+	httpMetrics = append(httpMetrics, inFlightMetric, requestDurationMetric, requestTotalMetric, requestSizeMetric, responseSizeMetric)
+	return httpMetrics
+}
+
+func (n *Namespace) NewInFlightGaugeMetric(handlerName string) *HTTPMetric {
+	labels := prometheus.Labels(n.labels)
+	labels["handler"] = handlerName
+	metric := prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        "in_flight_requests",
+		Help:        "The in-flight HTTP requests",
+		ConstLabels: prometheus.Labels(labels),
+	})
+	httpMetric := &HTTPMetric{
+		Collector:   metric,
+		handlerType: InstrumentHandlerInFlight,
+	}
+	n.Add(httpMetric)
+	return httpMetric
+}
+
+func (n *Namespace) NewRequestTotalMetric(handlerName string) *HTTPMetric {
+	labels := prometheus.Labels(n.labels)
+	labels["handler"] = handlerName
+	metric := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace:   n.name,
+			Subsystem:   n.subsystem,
+			Name:        "requests_total",
+			Help:        "Total number of HTTP requests made.",
+			ConstLabels: prometheus.Labels(labels),
+		},
+		[]string{"code", "method"},
+	)
+	httpMetric := &HTTPMetric{
+		Collector:   metric,
+		handlerType: InstrumentHandlerCounter,
+	}
+	n.Add(httpMetric)
+	return httpMetric
+}
+func (n *Namespace) NewRequestDurationMetric(handlerName string, buckets []float64) *HTTPMetric {
+	if len(buckets) == 0 {
+		panic("DurationBuckets must be provided")
+	}
+	labels := prometheus.Labels(n.labels)
+	labels["handler"] = handlerName
+	opts := prometheus.HistogramOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        "request_duration_seconds",
+		Help:        "The HTTP request latencies in seconds.",
+		Buckets:     buckets,
+		ConstLabels: prometheus.Labels(labels),
+	}
+	metric := prometheus.NewHistogramVec(opts, []string{"method"})
+	httpMetric := &HTTPMetric{
+		Collector:   metric,
+		handlerType: InstrumentHandlerDuration,
+	}
+	n.Add(httpMetric)
+	return httpMetric
+}
+
+func (n *Namespace) NewRequestSizeMetric(handlerName string, buckets []float64) *HTTPMetric {
+	if len(buckets) == 0 {
+		panic("RequestSizeBuckets must be provided")
+	}
+	labels := prometheus.Labels(n.labels)
+	labels["handler"] = handlerName
+	opts := prometheus.HistogramOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        "request_size_bytes",
+		Help:        "The HTTP request sizes in bytes.",
+		Buckets:     buckets,
+		ConstLabels: prometheus.Labels(labels),
+	}
+	metric := prometheus.NewHistogramVec(opts, []string{})
+	httpMetric := &HTTPMetric{
+		Collector:   metric,
+		handlerType: InstrumentHandlerRequestSize,
+	}
+	n.Add(httpMetric)
+	return httpMetric
+}
+
+func (n *Namespace) NewResponseSizeMetric(handlerName string, buckets []float64) *HTTPMetric {
+	if len(buckets) == 0 {
+		panic("ResponseSizeBuckets must be provided")
+	}
+	labels := prometheus.Labels(n.labels)
+	labels["handler"] = handlerName
+	opts := prometheus.HistogramOpts{
+		Namespace:   n.name,
+		Subsystem:   n.subsystem,
+		Name:        "response_size_bytes",
+		Help:        "The HTTP response sizes in bytes.",
+		Buckets:     buckets,
+		ConstLabels: prometheus.Labels(labels),
+	}
+	metrics := prometheus.NewHistogramVec(opts, []string{})
+	httpMetric := &HTTPMetric{
+		Collector:   metrics,
+		handlerType: InstrumentHandlerResponseSize,
+	}
+	n.Add(httpMetric)
+	return httpMetric
+}
diff --git a/vendor/github.com/docker/go-metrics/register.go b/vendor/github.com/docker/go-metrics/register.go
new file mode 100644
index 000000000..708358df0
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/register.go
@@ -0,0 +1,15 @@
+package metrics
+
+import "github.com/prometheus/client_golang/prometheus"
+
+// Register adds all the metrics in the provided namespace to the global
+// metrics registry
+func Register(n *Namespace) {
+	prometheus.MustRegister(n)
+}
+
+// Deregister removes all the metrics in the provided namespace from the
+// global metrics registry
+func Deregister(n *Namespace) {
+	prometheus.Unregister(n)
+}
diff --git a/vendor/github.com/docker/go-metrics/timer.go b/vendor/github.com/docker/go-metrics/timer.go
new file mode 100644
index 000000000..824c98739
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/timer.go
@@ -0,0 +1,85 @@
+package metrics
+
+import (
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// StartTimer begins a timer observation at the callsite. When the target
+// operation is completed, the caller should call the return done func().
+func StartTimer(timer Timer) (done func()) {
+	start := time.Now()
+	return func() {
+		timer.Update(time.Since(start))
+	}
+}
+
+// Timer is a metric that allows collecting the duration of an action in seconds
+type Timer interface {
+	// Update records an observation, duration, and converts to the target
+	// units.
+	Update(duration time.Duration)
+
+	// UpdateSince will add the duration from the provided starting time to the
+	// timer's summary with the precisions that was used in creation of the timer
+	UpdateSince(time.Time)
+}
+
+// LabeledTimer is a timer that must have label values populated before use.
+type LabeledTimer interface {
+	WithValues(labels ...string) *labeledTimerObserver
+}
+
+type labeledTimer struct {
+	m *prometheus.HistogramVec
+}
+
+type labeledTimerObserver struct {
+	m prometheus.Observer
+}
+
+func (lbo *labeledTimerObserver) Update(duration time.Duration) {
+	lbo.m.Observe(duration.Seconds())
+}
+
+func (lbo *labeledTimerObserver) UpdateSince(since time.Time) {
+	lbo.m.Observe(time.Since(since).Seconds())
+}
+
+func (lt *labeledTimer) WithValues(labels ...string) *labeledTimerObserver {
+	return &labeledTimerObserver{m: lt.m.WithLabelValues(labels...)}
+}
+
+func (lt *labeledTimer) Describe(c chan<- *prometheus.Desc) {
+	lt.m.Describe(c)
+}
+
+func (lt *labeledTimer) Collect(c chan<- prometheus.Metric) {
+	lt.m.Collect(c)
+}
+
+type timer struct {
+	m prometheus.Observer
+}
+
+func (t *timer) Update(duration time.Duration) {
+	t.m.Observe(duration.Seconds())
+}
+
+func (t *timer) UpdateSince(since time.Time) {
+	t.m.Observe(time.Since(since).Seconds())
+}
+
+func (t *timer) Describe(c chan<- *prometheus.Desc) {
+	c <- t.m.(prometheus.Metric).Desc()
+}
+
+func (t *timer) Collect(c chan<- prometheus.Metric) {
+	// Are there any observers that don't implement Collector? It is really
+	// unclear what the point of the upstream change was, but we'll let this
+	// panic if we get an observer that doesn't implement collector. In this
+	// case, we should almost always see metricVec objects, so this should
+	// never panic.
+	t.m.(prometheus.Collector).Collect(c)
+}
diff --git a/vendor/github.com/docker/go-metrics/unit.go b/vendor/github.com/docker/go-metrics/unit.go
new file mode 100644
index 000000000..c96622f90
--- /dev/null
+++ b/vendor/github.com/docker/go-metrics/unit.go
@@ -0,0 +1,12 @@
+package metrics
+
+// Unit represents the type or precision of a metric that is appended to
+// the metrics fully qualified name
+type Unit string
+
+const (
+	Nanoseconds Unit = "nanoseconds"
+	Seconds     Unit = "seconds"
+	Bytes       Unit = "bytes"
+	Total       Unit = "total"
+)
diff --git a/vendor/github.com/etcd-io/bbolt/bolt_riscv64.go b/vendor/github.com/etcd-io/bbolt/bolt_riscv64.go
new file mode 100644
index 000000000..07b4b47cd
--- /dev/null
+++ b/vendor/github.com/etcd-io/bbolt/bolt_riscv64.go
@@ -0,0 +1,12 @@
+// +build riscv64
+
+package bbolt
+
+// maxMapSize represents the largest mmap size supported by Bolt.
+const maxMapSize = 0xFFFFFFFFFFFF // 256TB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0x7FFFFFFF
+
+// Are unaligned load/stores broken on this arch?
+var brokenUnaligned = true
diff --git a/vendor/github.com/etcd-io/bbolt/db.go b/vendor/github.com/etcd-io/bbolt/db.go
index 962248c99..870c8b1cc 100644
--- a/vendor/github.com/etcd-io/bbolt/db.go
+++ b/vendor/github.com/etcd-io/bbolt/db.go
@@ -121,6 +121,7 @@ type DB struct {
 	AllocSize int
 
 	path     string
+	openFile func(string, int, os.FileMode) (*os.File, error)
 	file     *os.File
 	dataref  []byte // mmap'ed readonly, write throws SEGV
 	data     *[maxMapSize]byte
@@ -199,10 +200,15 @@ func Open(path string, mode os.FileMode, options *Options) (*DB, error) {
 		db.readOnly = true
 	}
 
+	db.openFile = options.OpenFile
+	if db.openFile == nil {
+		db.openFile = os.OpenFile
+	}
+
 	// Open data file and separate sync handler for metadata writes.
 	db.path = path
 	var err error
-	if db.file, err = os.OpenFile(db.path, flag|os.O_CREATE, mode); err != nil {
+	if db.file, err = db.openFile(db.path, flag|os.O_CREATE, mode); err != nil {
 		_ = db.close()
 		return nil, err
 	}
@@ -1054,6 +1060,10 @@ type Options struct {
 	// set directly on the DB itself when returned from Open(), but this option
 	// is useful in APIs which expose Options but not the underlying DB.
 	NoSync bool
+
+	// OpenFile is used to open files. It defaults to os.OpenFile. This option
+	// is useful for writing hermetic tests.
+	OpenFile func(string, int, os.FileMode) (*os.File, error)
 }
 
 // DefaultOptions represent the options used if nil options are passed into Open().
diff --git a/vendor/github.com/etcd-io/bbolt/freelist.go b/vendor/github.com/etcd-io/bbolt/freelist.go
index 93fd85d50..587b8cc02 100644
--- a/vendor/github.com/etcd-io/bbolt/freelist.go
+++ b/vendor/github.com/etcd-io/bbolt/freelist.go
@@ -349,6 +349,28 @@ func (f *freelist) reload(p *page) {
 	f.readIDs(a)
 }
 
+// noSyncReload reads the freelist from pgids and filters out pending items.
+func (f *freelist) noSyncReload(pgids []pgid) {
+	// Build a cache of only pending pages.
+	pcache := make(map[pgid]bool)
+	for _, txp := range f.pending {
+		for _, pendingID := range txp.ids {
+			pcache[pendingID] = true
+		}
+	}
+
+	// Check each page in the freelist and build a new available freelist
+	// with any pages not in the pending lists.
+	var a []pgid
+	for _, id := range pgids {
+		if !pcache[id] {
+			a = append(a, id)
+		}
+	}
+
+	f.readIDs(a)
+}
+
 // reindex rebuilds the free cache based on available and pending free lists.
 func (f *freelist) reindex() {
 	ids := f.getFreePageIDs()
diff --git a/vendor/github.com/etcd-io/bbolt/tx.go b/vendor/github.com/etcd-io/bbolt/tx.go
index f50864142..2df7688c2 100644
--- a/vendor/github.com/etcd-io/bbolt/tx.go
+++ b/vendor/github.com/etcd-io/bbolt/tx.go
@@ -254,17 +254,36 @@ func (tx *Tx) Rollback() error {
 	if tx.db == nil {
 		return ErrTxClosed
 	}
-	tx.rollback()
+	tx.nonPhysicalRollback()
 	return nil
 }
 
+// nonPhysicalRollback is called when user calls Rollback directly, in this case we do not need to reload the free pages from disk.
+func (tx *Tx) nonPhysicalRollback() {
+	if tx.db == nil {
+		return
+	}
+	if tx.writable {
+		tx.db.freelist.rollback(tx.meta.txid)
+	}
+	tx.close()
+}
+
+// rollback needs to reload the free pages from disk in case some system error happens like fsync error.
 func (tx *Tx) rollback() {
 	if tx.db == nil {
 		return
 	}
 	if tx.writable {
 		tx.db.freelist.rollback(tx.meta.txid)
-		tx.db.freelist.reload(tx.db.page(tx.db.meta().freelist))
+		if !tx.db.hasSyncedFreelist() {
+			// Reconstruct free page list by scanning the DB to get the whole free page list.
+			// Note: scaning the whole db is heavy if your db size is large in NoSyncFreeList mode.
+			tx.db.freelist.noSyncReload(tx.db.freepages())
+		} else {
+			// Read free page list from freelist page.
+			tx.db.freelist.reload(tx.db.page(tx.db.meta().freelist))
+		}
 	}
 	tx.close()
 }
@@ -315,7 +334,7 @@ func (tx *Tx) Copy(w io.Writer) error {
 // If err == nil then exactly tx.Size() bytes will be written into the writer.
 func (tx *Tx) WriteTo(w io.Writer) (n int64, err error) {
 	// Attempt to open reader with WriteFlag
-	f, err := os.OpenFile(tx.db.path, os.O_RDONLY|tx.WriteFlag, 0)
+	f, err := tx.db.openFile(tx.db.path, os.O_RDONLY|tx.WriteFlag, 0)
 	if err != nil {
 		return 0, err
 	}
@@ -369,7 +388,7 @@ func (tx *Tx) WriteTo(w io.Writer) (n int64, err error) {
 // A reader transaction is maintained during the copy so it is safe to continue
 // using the database while a copy is in progress.
 func (tx *Tx) CopyFile(path string, mode os.FileMode) error {
-	f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, mode)
+	f, err := tx.db.openFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, mode)
 	if err != nil {
 		return err
 	}
diff --git a/vendor/github.com/godbus/dbus/.travis.yml b/vendor/github.com/godbus/dbus/.travis.yml
index 2e1bbb78c..9cd57f432 100644
--- a/vendor/github.com/godbus/dbus/.travis.yml
+++ b/vendor/github.com/godbus/dbus/.travis.yml
@@ -4,8 +4,10 @@ go_import_path: github.com/godbus/dbus
 sudo: true
 
 go:
-  - 1.6.3
   - 1.7.3
+  - 1.8.7
+  - 1.9.5
+  - 1.10.1
   - tip
 
 env:
@@ -38,3 +40,7 @@ addons:
     - dbus-x11
 
 before_install:
+
+script:
+  - go test -v -race ./...                   # Run all the tests with the race detector enabled
+  - go vet ./...                             # go vet is the official Go static analyzer
diff --git a/vendor/github.com/godbus/dbus/README.markdown b/vendor/github.com/godbus/dbus/README.markdown
index d37f4e2ed..fd2964875 100644
--- a/vendor/github.com/godbus/dbus/README.markdown
+++ b/vendor/github.com/godbus/dbus/README.markdown
@@ -14,7 +14,7 @@ D-Bus message bus system.
 
 ### Installation
 
-This packages requires Go 1.1. If you installed it and set up your GOPATH, just run:
+This packages requires Go 1.7. If you installed it and set up your GOPATH, just run:
 
 ```
 go get github.com/godbus/dbus
diff --git a/vendor/github.com/godbus/dbus/auth.go b/vendor/github.com/godbus/dbus/auth.go
index 98017b693..b0dcb54e6 100644
--- a/vendor/github.com/godbus/dbus/auth.go
+++ b/vendor/github.com/godbus/dbus/auth.go
@@ -116,7 +116,6 @@ func (conn *Conn) Auth(methods []Auth) error {
 						return err
 					}
 					go conn.inWorker()
-					go conn.outWorker()
 					return nil
 				}
 			}
diff --git a/vendor/github.com/godbus/dbus/auth_anonymous.go b/vendor/github.com/godbus/dbus/auth_anonymous.go
new file mode 100644
index 000000000..75f3ad34d
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/auth_anonymous.go
@@ -0,0 +1,16 @@
+package dbus
+
+// AuthAnonymous returns an Auth that uses the ANONYMOUS mechanism.
+func AuthAnonymous() Auth {
+	return &authAnonymous{}
+}
+
+type authAnonymous struct{}
+
+func (a *authAnonymous) FirstData() (name, resp []byte, status AuthStatus) {
+	return []byte("ANONYMOUS"), nil, AuthOk
+}
+
+func (a *authAnonymous) HandleData(data []byte) (resp []byte, status AuthStatus) {
+	return nil, AuthError
+}
diff --git a/vendor/github.com/godbus/dbus/call.go b/vendor/github.com/godbus/dbus/call.go
index ba6e73f60..2cb189012 100644
--- a/vendor/github.com/godbus/dbus/call.go
+++ b/vendor/github.com/godbus/dbus/call.go
@@ -1,9 +1,12 @@
 package dbus
 
 import (
+	"context"
 	"errors"
 )
 
+var errSignature = errors.New("dbus: mismatched signature")
+
 // Call represents a pending or completed method call.
 type Call struct {
 	Destination string
@@ -20,9 +23,25 @@ type Call struct {
 
 	// Holds the response once the call is done.
 	Body []interface{}
+
+	// tracks context and canceler
+	ctx         context.Context
+	ctxCanceler context.CancelFunc
 }
 
-var errSignature = errors.New("dbus: mismatched signature")
+func (c *Call) Context() context.Context {
+	if c.ctx == nil {
+		return context.Background()
+	}
+
+	return c.ctx
+}
+
+func (c *Call) ContextCancel() {
+	if c.ctxCanceler != nil {
+		c.ctxCanceler()
+	}
+}
 
 // Store stores the body of the reply into the provided pointers. It returns
 // an error if the signatures of the body and retvalues don't match, or if
@@ -34,3 +53,8 @@ func (c *Call) Store(retvalues ...interface{}) error {
 
 	return Store(c.Body, retvalues...)
 }
+
+func (c *Call) done() {
+	c.Done <- c
+	c.ContextCancel()
+}
diff --git a/vendor/github.com/godbus/dbus/conn.go b/vendor/github.com/godbus/dbus/conn.go
index 5720e2ebb..b38920baf 100644
--- a/vendor/github.com/godbus/dbus/conn.go
+++ b/vendor/github.com/godbus/dbus/conn.go
@@ -1,6 +1,7 @@
 package dbus
 
 import (
+	"context"
 	"errors"
 	"io"
 	"os"
@@ -14,7 +15,6 @@ var (
 	systemBusLck  sync.Mutex
 	sessionBus    *Conn
 	sessionBusLck sync.Mutex
-	sessionEnvLck sync.Mutex
 )
 
 // ErrClosed is the error returned by calls on a closed connection.
@@ -35,23 +35,13 @@ type Conn struct {
 	unixFD bool
 	uuid   string
 
-	names    []string
-	namesLck sync.RWMutex
-
-	serialLck  sync.Mutex
-	nextSerial uint32
-	serialUsed map[uint32]bool
-
-	calls    map[uint32]*Call
-	callsLck sync.RWMutex
-
-	handler Handler
-
-	out    chan *Message
-	closed bool
-	outLck sync.RWMutex
-
+	handler       Handler
 	signalHandler SignalHandler
+	serialGen     SerialGenerator
+
+	names      *nameTracker
+	calls      *callTracker
+	outHandler *outputHandler
 
 	eavesdropped    chan<- *Message
 	eavesdroppedLck sync.Mutex
@@ -87,32 +77,31 @@ func SessionBus() (conn *Conn, err error) {
 }
 
 func getSessionBusAddress() (string, error) {
-	sessionEnvLck.Lock()
-	defer sessionEnvLck.Unlock()
-	address := os.Getenv("DBUS_SESSION_BUS_ADDRESS")
-	if address != "" && address != "autolaunch:" {
+	if address := os.Getenv("DBUS_SESSION_BUS_ADDRESS"); address != "" && address != "autolaunch:" {
+		return address, nil
+
+	} else if address := tryDiscoverDbusSessionBusAddress(); address != "" {
+		os.Setenv("DBUS_SESSION_BUS_ADDRESS", address)
 		return address, nil
 	}
 	return getSessionBusPlatformAddress()
 }
 
 // SessionBusPrivate returns a new private connection to the session bus.
-func SessionBusPrivate() (*Conn, error) {
+func SessionBusPrivate(opts ...ConnOption) (*Conn, error) {
 	address, err := getSessionBusAddress()
 	if err != nil {
 		return nil, err
 	}
 
-	return Dial(address)
+	return Dial(address, opts...)
 }
 
 // SessionBusPrivate returns a new private connection to the session bus.
+//
+// Deprecated: use SessionBusPrivate with options instead.
 func SessionBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
-	address, err := getSessionBusAddress()
-	if err != nil {
-		return nil, err
-	}
-	return DialHandler(address, handler, signalHandler)
+	return SessionBusPrivate(WithHandler(handler), WithSignalHandler(signalHandler))
 }
 
 // SystemBus returns a shared connection to the system bus, connecting to it if
@@ -145,53 +134,93 @@ func SystemBus() (conn *Conn, err error) {
 }
 
 // SystemBusPrivate returns a new private connection to the system bus.
-func SystemBusPrivate() (*Conn, error) {
-	return Dial(getSystemBusPlatformAddress())
+func SystemBusPrivate(opts ...ConnOption) (*Conn, error) {
+	return Dial(getSystemBusPlatformAddress(), opts...)
 }
 
 // SystemBusPrivateHandler returns a new private connection to the system bus, using the provided handlers.
+//
+// Deprecated: use SystemBusPrivate with options instead.
 func SystemBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
-	return DialHandler(getSystemBusPlatformAddress(), handler, signalHandler)
+	return SystemBusPrivate(WithHandler(handler), WithSignalHandler(signalHandler))
 }
 
 // Dial establishes a new private connection to the message bus specified by address.
-func Dial(address string) (*Conn, error) {
+func Dial(address string, opts ...ConnOption) (*Conn, error) {
 	tr, err := getTransport(address)
 	if err != nil {
 		return nil, err
 	}
-	return newConn(tr, NewDefaultHandler(), NewDefaultSignalHandler())
+	return newConn(tr, opts...)
 }
 
 // DialHandler establishes a new private connection to the message bus specified by address, using the supplied handlers.
+//
+// Deprecated: use Dial with options instead.
 func DialHandler(address string, handler Handler, signalHandler SignalHandler) (*Conn, error) {
-	tr, err := getTransport(address)
-	if err != nil {
-		return nil, err
+	return Dial(address, WithSignalHandler(signalHandler))
+}
+
+// ConnOption is a connection option.
+type ConnOption func(conn *Conn) error
+
+// WithHandler overrides the default handler.
+func WithHandler(handler Handler) ConnOption {
+	return func(conn *Conn) error {
+		conn.handler = handler
+		return nil
+	}
+}
+
+// WithSignalHandler overrides the default signal handler.
+func WithSignalHandler(handler SignalHandler) ConnOption {
+	return func(conn *Conn) error {
+		conn.signalHandler = handler
+		return nil
+	}
+}
+
+// WithSerialGenerator overrides the default signals generator.
+func WithSerialGenerator(gen SerialGenerator) ConnOption {
+	return func(conn *Conn) error {
+		conn.serialGen = gen
+		return nil
 	}
-	return newConn(tr, handler, signalHandler)
 }
 
 // NewConn creates a new private *Conn from an already established connection.
-func NewConn(conn io.ReadWriteCloser) (*Conn, error) {
-	return NewConnHandler(conn, NewDefaultHandler(), NewDefaultSignalHandler())
+func NewConn(conn io.ReadWriteCloser, opts ...ConnOption) (*Conn, error) {
+	return newConn(genericTransport{conn}, opts...)
 }
 
 // NewConnHandler creates a new private *Conn from an already established connection, using the supplied handlers.
+//
+// Deprecated: use NewConn with options instead.
 func NewConnHandler(conn io.ReadWriteCloser, handler Handler, signalHandler SignalHandler) (*Conn, error) {
-	return newConn(genericTransport{conn}, handler, signalHandler)
+	return NewConn(genericTransport{conn}, WithHandler(handler), WithSignalHandler(signalHandler))
 }
 
 // newConn creates a new *Conn from a transport.
-func newConn(tr transport, handler Handler, signalHandler SignalHandler) (*Conn, error) {
+func newConn(tr transport, opts ...ConnOption) (*Conn, error) {
 	conn := new(Conn)
 	conn.transport = tr
-	conn.calls = make(map[uint32]*Call)
-	conn.out = make(chan *Message, 10)
-	conn.handler = handler
-	conn.signalHandler = signalHandler
-	conn.nextSerial = 1
-	conn.serialUsed = map[uint32]bool{0: true}
+	for _, opt := range opts {
+		if err := opt(conn); err != nil {
+			return nil, err
+		}
+	}
+	conn.calls = newCallTracker()
+	if conn.handler == nil {
+		conn.handler = NewDefaultHandler()
+	}
+	if conn.signalHandler == nil {
+		conn.signalHandler = NewDefaultSignalHandler()
+	}
+	if conn.serialGen == nil {
+		conn.serialGen = newSerialGenerator()
+	}
+	conn.outHandler = &outputHandler{conn: conn}
+	conn.names = newNameTracker()
 	conn.busObj = conn.Object("org.freedesktop.DBus", "/org/freedesktop/DBus")
 	return conn, nil
 }
@@ -206,18 +235,7 @@ func (conn *Conn) BusObject() BusObject {
 // and the channels passed to Eavesdrop and Signal are closed. This method must
 // not be called on shared connections.
 func (conn *Conn) Close() error {
-	conn.outLck.Lock()
-	if conn.closed {
-		// inWorker calls Close on read error, the read error may
-		// be caused by another caller calling Close to shutdown the
-		// dbus connection, a double-close scenario we prevent here.
-		conn.outLck.Unlock()
-		return nil
-	}
-	close(conn.out)
-	conn.closed = true
-	conn.outLck.Unlock()
-
+	conn.outHandler.close()
 	if term, ok := conn.signalHandler.(Terminator); ok {
 		term.Terminate()
 	}
@@ -249,17 +267,9 @@ func (conn *Conn) Eavesdrop(ch chan<- *Message) {
 	conn.eavesdroppedLck.Unlock()
 }
 
-// getSerial returns an unused serial.
+// GetSerial returns an unused serial.
 func (conn *Conn) getSerial() uint32 {
-	conn.serialLck.Lock()
-	defer conn.serialLck.Unlock()
-	n := conn.nextSerial
-	for conn.serialUsed[n] {
-		n++
-	}
-	conn.serialUsed[n] = true
-	conn.nextSerial = n + 1
-	return n
+	return conn.serialGen.GetSerial()
 }
 
 // Hello sends the initial org.freedesktop.DBus.Hello call. This method must be
@@ -271,10 +281,7 @@ func (conn *Conn) Hello() error {
 	if err != nil {
 		return err
 	}
-	conn.namesLck.Lock()
-	conn.names = make([]string, 1)
-	conn.names[0] = s
-	conn.namesLck.Unlock()
+	conn.names.acquireUniqueConnectionName(s)
 	return nil
 }
 
@@ -283,109 +290,48 @@ func (conn *Conn) Hello() error {
 func (conn *Conn) inWorker() {
 	for {
 		msg, err := conn.ReadMessage()
-		if err == nil {
-			conn.eavesdroppedLck.Lock()
-			if conn.eavesdropped != nil {
-				select {
-				case conn.eavesdropped <- msg:
-				default:
-				}
-				conn.eavesdroppedLck.Unlock()
-				continue
-			}
-			conn.eavesdroppedLck.Unlock()
-			dest, _ := msg.Headers[FieldDestination].value.(string)
-			found := false
-			if dest == "" {
-				found = true
-			} else {
-				conn.namesLck.RLock()
-				if len(conn.names) == 0 {
-					found = true
-				}
-				for _, v := range conn.names {
-					if dest == v {
-						found = true
-						break
-					}
-				}
-				conn.namesLck.RUnlock()
-			}
-			if !found {
-				// Eavesdropped a message, but no channel for it is registered.
-				// Ignore it.
-				continue
-			}
-			switch msg.Type {
-			case TypeMethodReply, TypeError:
-				serial := msg.Headers[FieldReplySerial].value.(uint32)
-				conn.callsLck.Lock()
-				if c, ok := conn.calls[serial]; ok {
-					if msg.Type == TypeError {
-						name, _ := msg.Headers[FieldErrorName].value.(string)
-						c.Err = Error{name, msg.Body}
-					} else {
-						c.Body = msg.Body
-					}
-					c.Done <- c
-					conn.serialLck.Lock()
-					delete(conn.serialUsed, serial)
-					conn.serialLck.Unlock()
-					delete(conn.calls, serial)
-				}
-				conn.callsLck.Unlock()
-			case TypeSignal:
-				iface := msg.Headers[FieldInterface].value.(string)
-				member := msg.Headers[FieldMember].value.(string)
-				// as per http://dbus.freedesktop.org/doc/dbus-specification.html ,
-				// sender is optional for signals.
-				sender, _ := msg.Headers[FieldSender].value.(string)
-				if iface == "org.freedesktop.DBus" && sender == "org.freedesktop.DBus" {
-					if member == "NameLost" {
-						// If we lost the name on the bus, remove it from our
-						// tracking list.
-						name, ok := msg.Body[0].(string)
-						if !ok {
-							panic("Unable to read the lost name")
-						}
-						conn.namesLck.Lock()
-						for i, v := range conn.names {
-							if v == name {
-								conn.names = append(conn.names[:i],
-									conn.names[i+1:]...)
-							}
-						}
-						conn.namesLck.Unlock()
-					} else if member == "NameAcquired" {
-						// If we acquired the name on the bus, add it to our
-						// tracking list.
-						name, ok := msg.Body[0].(string)
-						if !ok {
-							panic("Unable to read the acquired name")
-						}
-						conn.namesLck.Lock()
-						conn.names = append(conn.names, name)
-						conn.namesLck.Unlock()
-					}
-				}
-				conn.handleSignal(msg)
-			case TypeMethodCall:
-				go conn.handleCall(msg)
+		if err != nil {
+			if _, ok := err.(InvalidMessageError); !ok {
+				// Some read error occured (usually EOF); we can't really do
+				// anything but to shut down all stuff and returns errors to all
+				// pending replies.
+				conn.Close()
+				conn.calls.finalizeAllWithError(err)
+				return
 			}
-		} else if _, ok := err.(InvalidMessageError); !ok {
-			// Some read error occured (usually EOF); we can't really do
-			// anything but to shut down all stuff and returns errors to all
-			// pending replies.
-			conn.Close()
-			conn.callsLck.RLock()
-			for _, v := range conn.calls {
-				v.Err = err
-				v.Done <- v
+			// invalid messages are ignored
+			continue
+		}
+		conn.eavesdroppedLck.Lock()
+		if conn.eavesdropped != nil {
+			select {
+			case conn.eavesdropped <- msg:
+			default:
 			}
-			conn.callsLck.RUnlock()
-			return
+			conn.eavesdroppedLck.Unlock()
+			continue
+		}
+		conn.eavesdroppedLck.Unlock()
+		dest, _ := msg.Headers[FieldDestination].value.(string)
+		found := dest == "" ||
+			!conn.names.uniqueNameIsKnown() ||
+			conn.names.isKnownName(dest)
+		if !found {
+			// Eavesdropped a message, but no channel for it is registered.
+			// Ignore it.
+			continue
+		}
+		switch msg.Type {
+		case TypeError:
+			conn.serialGen.RetireSerial(conn.calls.handleDBusError(msg))
+		case TypeMethodReply:
+			conn.serialGen.RetireSerial(conn.calls.handleReply(msg))
+		case TypeSignal:
+			conn.handleSignal(msg)
+		case TypeMethodCall:
+			go conn.handleCall(msg)
 		}
-		// invalid messages are ignored
+
 	}
 }
 
@@ -395,6 +341,25 @@ func (conn *Conn) handleSignal(msg *Message) {
 	// as per http://dbus.freedesktop.org/doc/dbus-specification.html ,
 	// sender is optional for signals.
 	sender, _ := msg.Headers[FieldSender].value.(string)
+	if iface == "org.freedesktop.DBus" && sender == "org.freedesktop.DBus" {
+		if member == "NameLost" {
+			// If we lost the name on the bus, remove it from our
+			// tracking list.
+			name, ok := msg.Body[0].(string)
+			if !ok {
+				panic("Unable to read the lost name")
+			}
+			conn.names.loseName(name)
+		} else if member == "NameAcquired" {
+			// If we acquired the name on the bus, add it to our
+			// tracking list.
+			name, ok := msg.Body[0].(string)
+			if !ok {
+				panic("Unable to read the acquired name")
+			}
+			conn.names.acquireName(name)
+		}
+	}
 	signal := &Signal{
 		Sender: sender,
 		Path:   msg.Headers[FieldPath].value.(ObjectPath),
@@ -408,12 +373,7 @@ func (conn *Conn) handleSignal(msg *Message) {
 // connection. The slice is always at least one element long, the first element
 // being the unique name of the connection.
 func (conn *Conn) Names() []string {
-	conn.namesLck.RLock()
-	// copy the slice so it can't be modified
-	s := make([]string, len(conn.names))
-	copy(s, conn.names)
-	conn.namesLck.RUnlock()
-	return s
+	return conn.names.listKnownNames()
 }
 
 // Object returns the object identified by the given destination name and path.
@@ -423,24 +383,17 @@ func (conn *Conn) Object(dest string, path ObjectPath) BusObject {
 
 // outWorker runs in an own goroutine, encoding and sending messages that are
 // sent to conn.out.
-func (conn *Conn) outWorker() {
-	for msg := range conn.out {
-		err := conn.SendMessage(msg)
-		conn.callsLck.RLock()
-		if err != nil {
-			if c := conn.calls[msg.serial]; c != nil {
-				c.Err = err
-				c.Done <- c
-			}
-			conn.serialLck.Lock()
-			delete(conn.serialUsed, msg.serial)
-			conn.serialLck.Unlock()
-		} else if msg.Type != TypeMethodCall {
-			conn.serialLck.Lock()
-			delete(conn.serialUsed, msg.serial)
-			conn.serialLck.Unlock()
-		}
-		conn.callsLck.RUnlock()
+func (conn *Conn) sendMessage(msg *Message) {
+	conn.sendMessageAndIfClosed(msg, func() {})
+}
+
+func (conn *Conn) sendMessageAndIfClosed(msg *Message, ifClosed func()) {
+	err := conn.outHandler.sendAndIfClosed(msg, ifClosed)
+	conn.calls.handleSendError(msg, err)
+	if err != nil {
+		conn.serialGen.RetireSerial(msg.serial)
+	} else if msg.Type != TypeMethodCall {
+		conn.serialGen.RetireSerial(msg.serial)
 	}
 }
 
@@ -451,8 +404,21 @@ func (conn *Conn) outWorker() {
 // once the call is complete. Otherwise, ch is ignored and a Call structure is
 // returned of which only the Err member is valid.
 func (conn *Conn) Send(msg *Message, ch chan *Call) *Call {
-	var call *Call
+	return conn.send(context.Background(), msg, ch)
+}
 
+// SendWithContext acts like Send but takes a context
+func (conn *Conn) SendWithContext(ctx context.Context, msg *Message, ch chan *Call) *Call {
+	return conn.send(ctx, msg, ch)
+}
+
+func (conn *Conn) send(ctx context.Context, msg *Message, ch chan *Call) *Call {
+	if ctx == nil {
+		panic("nil context")
+	}
+
+	var call *Call
+	ctx, canceler := context.WithCancel(ctx)
 	msg.serial = conn.getSerial()
 	if msg.Type == TypeMethodCall && msg.Flags&FlagNoReplyExpected == 0 {
 		if ch == nil {
@@ -468,26 +434,23 @@ func (conn *Conn) Send(msg *Message, ch chan *Call) *Call {
 		call.Method = iface + "." + member
 		call.Args = msg.Body
 		call.Done = ch
-		conn.callsLck.Lock()
-		conn.calls[msg.serial] = call
-		conn.callsLck.Unlock()
-		conn.outLck.RLock()
-		if conn.closed {
-			call.Err = ErrClosed
-			call.Done <- call
-		} else {
-			conn.out <- msg
-		}
-		conn.outLck.RUnlock()
+		call.ctx = ctx
+		call.ctxCanceler = canceler
+		conn.calls.track(msg.serial, call)
+		go func() {
+			<-ctx.Done()
+			conn.calls.handleSendError(msg, ctx.Err())
+		}()
+		conn.sendMessageAndIfClosed(msg, func() {
+			conn.calls.handleSendError(msg, ErrClosed)
+			canceler()
+		})
 	} else {
-		conn.outLck.RLock()
-		if conn.closed {
+		canceler()
+		call = &Call{Err: nil}
+		conn.sendMessageAndIfClosed(msg, func() {
 			call = &Call{Err: ErrClosed}
-		} else {
-			conn.out <- msg
-			call = &Call{Err: nil}
-		}
-		conn.outLck.RUnlock()
+		})
 	}
 	return call
 }
@@ -520,11 +483,7 @@ func (conn *Conn) sendError(err error, dest string, serial uint32) {
 	if len(e.Body) > 0 {
 		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(e.Body...))
 	}
-	conn.outLck.RLock()
-	if !conn.closed {
-		conn.out <- msg
-	}
-	conn.outLck.RUnlock()
+	conn.sendMessage(msg)
 }
 
 // sendReply creates a method reply message corresponding to the parameters and
@@ -542,11 +501,7 @@ func (conn *Conn) sendReply(dest string, serial uint32, values ...interface{}) {
 	if len(values) > 0 {
 		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(values...))
 	}
-	conn.outLck.RLock()
-	if !conn.closed {
-		conn.out <- msg
-	}
-	conn.outLck.RUnlock()
+	conn.sendMessage(msg)
 }
 
 func (conn *Conn) defaultSignalAction(fn func(h *defaultSignalHandler, ch chan<- *Signal), ch chan<- *Signal) {
@@ -681,3 +636,212 @@ func getKey(s, key string) string {
 	}
 	return ""
 }
+
+type outputHandler struct {
+	conn    *Conn
+	sendLck sync.Mutex
+	closed  struct {
+		isClosed bool
+		lck      sync.RWMutex
+	}
+}
+
+func (h *outputHandler) sendAndIfClosed(msg *Message, ifClosed func()) error {
+	h.closed.lck.RLock()
+	defer h.closed.lck.RUnlock()
+	if h.closed.isClosed {
+		ifClosed()
+		return nil
+	}
+	h.sendLck.Lock()
+	defer h.sendLck.Unlock()
+	return h.conn.SendMessage(msg)
+}
+
+func (h *outputHandler) close() {
+	h.closed.lck.Lock()
+	defer h.closed.lck.Unlock()
+	h.closed.isClosed = true
+}
+
+type serialGenerator struct {
+	lck        sync.Mutex
+	nextSerial uint32
+	serialUsed map[uint32]bool
+}
+
+func newSerialGenerator() *serialGenerator {
+	return &serialGenerator{
+		serialUsed: map[uint32]bool{0: true},
+		nextSerial: 1,
+	}
+}
+
+func (gen *serialGenerator) GetSerial() uint32 {
+	gen.lck.Lock()
+	defer gen.lck.Unlock()
+	n := gen.nextSerial
+	for gen.serialUsed[n] {
+		n++
+	}
+	gen.serialUsed[n] = true
+	gen.nextSerial = n + 1
+	return n
+}
+
+func (gen *serialGenerator) RetireSerial(serial uint32) {
+	gen.lck.Lock()
+	defer gen.lck.Unlock()
+	delete(gen.serialUsed, serial)
+}
+
+type nameTracker struct {
+	lck    sync.RWMutex
+	unique string
+	names  map[string]struct{}
+}
+
+func newNameTracker() *nameTracker {
+	return &nameTracker{names: map[string]struct{}{}}
+}
+func (tracker *nameTracker) acquireUniqueConnectionName(name string) {
+	tracker.lck.Lock()
+	defer tracker.lck.Unlock()
+	tracker.unique = name
+}
+func (tracker *nameTracker) acquireName(name string) {
+	tracker.lck.Lock()
+	defer tracker.lck.Unlock()
+	tracker.names[name] = struct{}{}
+}
+func (tracker *nameTracker) loseName(name string) {
+	tracker.lck.Lock()
+	defer tracker.lck.Unlock()
+	delete(tracker.names, name)
+}
+
+func (tracker *nameTracker) uniqueNameIsKnown() bool {
+	tracker.lck.RLock()
+	defer tracker.lck.RUnlock()
+	return tracker.unique != ""
+}
+func (tracker *nameTracker) isKnownName(name string) bool {
+	tracker.lck.RLock()
+	defer tracker.lck.RUnlock()
+	_, ok := tracker.names[name]
+	return ok || name == tracker.unique
+}
+func (tracker *nameTracker) listKnownNames() []string {
+	tracker.lck.RLock()
+	defer tracker.lck.RUnlock()
+	out := make([]string, 0, len(tracker.names)+1)
+	out = append(out, tracker.unique)
+	for k := range tracker.names {
+		out = append(out, k)
+	}
+	return out
+}
+
+type callTracker struct {
+	calls map[uint32]*Call
+	lck   sync.RWMutex
+}
+
+func newCallTracker() *callTracker {
+	return &callTracker{calls: map[uint32]*Call{}}
+}
+
+func (tracker *callTracker) track(sn uint32, call *Call) {
+	tracker.lck.Lock()
+	tracker.calls[sn] = call
+	tracker.lck.Unlock()
+}
+
+func (tracker *callTracker) handleReply(msg *Message) uint32 {
+	serial := msg.Headers[FieldReplySerial].value.(uint32)
+	tracker.lck.RLock()
+	_, ok := tracker.calls[serial]
+	tracker.lck.RUnlock()
+	if ok {
+		tracker.finalizeWithBody(serial, msg.Body)
+	}
+	return serial
+}
+
+func (tracker *callTracker) handleDBusError(msg *Message) uint32 {
+	serial := msg.Headers[FieldReplySerial].value.(uint32)
+	tracker.lck.RLock()
+	_, ok := tracker.calls[serial]
+	tracker.lck.RUnlock()
+	if ok {
+		name, _ := msg.Headers[FieldErrorName].value.(string)
+		tracker.finalizeWithError(serial, Error{name, msg.Body})
+	}
+	return serial
+}
+
+func (tracker *callTracker) handleSendError(msg *Message, err error) {
+	if err == nil {
+		return
+	}
+	tracker.lck.RLock()
+	_, ok := tracker.calls[msg.serial]
+	tracker.lck.RUnlock()
+	if ok {
+		tracker.finalizeWithError(msg.serial, err)
+	}
+}
+
+// finalize was the only func that did not strobe Done
+func (tracker *callTracker) finalize(sn uint32) {
+	tracker.lck.Lock()
+	defer tracker.lck.Unlock()
+	c, ok := tracker.calls[sn]
+	if ok {
+		delete(tracker.calls, sn)
+		c.ContextCancel()
+	}
+	return
+}
+
+func (tracker *callTracker) finalizeWithBody(sn uint32, body []interface{}) {
+	tracker.lck.Lock()
+	c, ok := tracker.calls[sn]
+	if ok {
+		delete(tracker.calls, sn)
+	}
+	tracker.lck.Unlock()
+	if ok {
+		c.Body = body
+		c.done()
+	}
+	return
+}
+
+func (tracker *callTracker) finalizeWithError(sn uint32, err error) {
+	tracker.lck.Lock()
+	c, ok := tracker.calls[sn]
+	if ok {
+		delete(tracker.calls, sn)
+	}
+	tracker.lck.Unlock()
+	if ok {
+		c.Err = err
+		c.done()
+	}
+	return
+}
+
+func (tracker *callTracker) finalizeAllWithError(err error) {
+	tracker.lck.Lock()
+	closedCalls := make([]*Call, 0, len(tracker.calls))
+	for sn := range tracker.calls {
+		closedCalls = append(closedCalls, tracker.calls[sn])
+	}
+	tracker.calls = map[uint32]*Call{}
+	tracker.lck.Unlock()
+	for _, call := range closedCalls {
+		call.Err = err
+		call.done()
+	}
+}
diff --git a/vendor/github.com/godbus/dbus/conn_darwin.go b/vendor/github.com/godbus/dbus/conn_darwin.go
index c015f80ce..6e2e40202 100644
--- a/vendor/github.com/godbus/dbus/conn_darwin.go
+++ b/vendor/github.com/godbus/dbus/conn_darwin.go
@@ -31,3 +31,7 @@ func getSystemBusPlatformAddress() string {
 	}
 	return defaultSystemBusAddress
 }
+
+func tryDiscoverDbusSessionBusAddress() string {
+	return ""
+}
diff --git a/vendor/github.com/godbus/dbus/conn_other.go b/vendor/github.com/godbus/dbus/conn_other.go
index 254c9f2ef..289044a44 100644
--- a/vendor/github.com/godbus/dbus/conn_other.go
+++ b/vendor/github.com/godbus/dbus/conn_other.go
@@ -6,12 +6,14 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"os"
 	"os/exec"
+	"os/user"
+	"path"
+	"strings"
 )
 
-const defaultSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
-
 func getSessionBusPlatformAddress() (string, error) {
 	cmd := exec.Command("dbus-launch")
 	b, err := cmd.CombinedOutput()
@@ -33,10 +35,57 @@ func getSessionBusPlatformAddress() (string, error) {
 	return addr, nil
 }
 
-func getSystemBusPlatformAddress() string {
-	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
-	if address != "" {
-		return fmt.Sprintf("unix:path=%s", address)
+// tryDiscoverDbusSessionBusAddress tries to discover an existing dbus session
+// and return the value of its DBUS_SESSION_BUS_ADDRESS.
+// It tries different techniques employed by different operating systems,
+// returning the first valid address it finds, or an empty string.
+//
+// * /run/user/<uid>/bus           if this exists, it *is* the bus socket. present on
+//                                 Ubuntu 18.04
+// * /run/user/<uid>/dbus-session: if this exists, it can be parsed for the bus
+//                                 address. present on Ubuntu 16.04
+//
+// See https://dbus.freedesktop.org/doc/dbus-launch.1.html
+func tryDiscoverDbusSessionBusAddress() string {
+	if runtimeDirectory, err := getRuntimeDirectory(); err == nil {
+
+		if runUserBusFile := path.Join(runtimeDirectory, "bus"); fileExists(runUserBusFile) {
+			// if /run/user/<uid>/bus exists, that file itself
+			// *is* the unix socket, so return its path
+			return fmt.Sprintf("unix:path=%s", runUserBusFile)
+		}
+		if runUserSessionDbusFile := path.Join(runtimeDirectory, "dbus-session"); fileExists(runUserSessionDbusFile) {
+			// if /run/user/<uid>/dbus-session exists, it's a
+			// text file // containing the address of the socket, e.g.:
+			// DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-E1c73yNqrG
+
+			if f, err := ioutil.ReadFile(runUserSessionDbusFile); err == nil {
+				fileContent := string(f)
+
+				prefix := "DBUS_SESSION_BUS_ADDRESS="
+
+				if strings.HasPrefix(fileContent, prefix) {
+					address := strings.TrimRight(strings.TrimPrefix(fileContent, prefix), "\n\r")
+					return address
+				}
+			}
+		}
+	}
+	return ""
+}
+
+func getRuntimeDirectory() (string, error) {
+	if currentUser, err := user.Current(); err != nil {
+		return "", err
+	} else {
+		return fmt.Sprintf("/run/user/%s", currentUser.Uid), nil
+	}
+}
+
+func fileExists(filename string) bool {
+	if _, err := os.Stat(filename); !os.IsNotExist(err) {
+		return true
+	} else {
+		return false
 	}
-	return defaultSystemBusAddress
 }
diff --git a/vendor/github.com/godbus/dbus/conn_unix.go b/vendor/github.com/godbus/dbus/conn_unix.go
new file mode 100644
index 000000000..4cba8ae8e
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/conn_unix.go
@@ -0,0 +1,18 @@
+//+build !windows,!solaris,!darwin
+
+package dbus
+
+import (
+	"os"
+	"fmt"
+)
+
+const defaultSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
+
+func getSystemBusPlatformAddress() string {
+	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
+	if address != "" {
+		return fmt.Sprintf("unix:path=%s", address)
+	}
+	return defaultSystemBusAddress
+}
\ No newline at end of file
diff --git a/vendor/github.com/godbus/dbus/conn_windows.go b/vendor/github.com/godbus/dbus/conn_windows.go
new file mode 100644
index 000000000..4291e4519
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/conn_windows.go
@@ -0,0 +1,15 @@
+//+build windows
+
+package dbus
+
+import "os"
+
+const defaultSystemBusAddress = "tcp:host=127.0.0.1,port=12434"
+
+func getSystemBusPlatformAddress() string {
+	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
+	if address != "" {
+		return address
+	}
+	return defaultSystemBusAddress
+}
diff --git a/vendor/github.com/godbus/dbus/decoder.go b/vendor/github.com/godbus/dbus/decoder.go
index ef50dcab9..5c27d3b51 100644
--- a/vendor/github.com/godbus/dbus/decoder.go
+++ b/vendor/github.com/godbus/dbus/decoder.go
@@ -191,7 +191,14 @@ func (dec *decoder) decode(s string, depth int) interface{} {
 		length := dec.decode("u", depth).(uint32)
 		v := reflect.MakeSlice(reflect.SliceOf(typeFor(s[1:])), 0, int(length))
 		// Even for empty arrays, the correct padding must be included
-		dec.align(alignment(typeFor(s[1:])))
+		align := alignment(typeFor(s[1:]))
+		if len(s) > 1 && s[1] == '(' {
+			//Special case for arrays of structs
+			//structs decode as a slice of interface{} values
+			//but the dbus alignment does not match this
+			align = 8
+		}
+		dec.align(align)
 		spos := dec.pos
 		for dec.pos < spos+int(length) {
 			ev := dec.decode(s[1:], depth+1)
diff --git a/vendor/github.com/godbus/dbus/default_handler.go b/vendor/github.com/godbus/dbus/default_handler.go
index e81f73ac5..81dbcc7e4 100644
--- a/vendor/github.com/godbus/dbus/default_handler.go
+++ b/vendor/github.com/godbus/dbus/default_handler.go
@@ -21,6 +21,8 @@ func newIntrospectIntf(h *defaultHandler) *exportedIntf {
 //NewDefaultHandler returns an instance of the default
 //call handler. This is useful if you want to implement only
 //one of the two handlers but not both.
+//
+// Deprecated: this is the default value, don't use it, it will be unexported.
 func NewDefaultHandler() *defaultHandler {
 	h := &defaultHandler{
 		objects:     make(map[ObjectPath]*exportedObj),
@@ -161,6 +163,7 @@ func newExportedObject() *exportedObj {
 }
 
 type exportedObj struct {
+	mu         sync.RWMutex
 	interfaces map[string]*exportedIntf
 }
 
@@ -168,19 +171,27 @@ func (obj *exportedObj) LookupInterface(name string) (Interface, bool) {
 	if name == "" {
 		return obj, true
 	}
+	obj.mu.RLock()
+	defer obj.mu.RUnlock()
 	intf, exists := obj.interfaces[name]
 	return intf, exists
 }
 
 func (obj *exportedObj) AddInterface(name string, iface *exportedIntf) {
+	obj.mu.Lock()
+	defer obj.mu.Unlock()
 	obj.interfaces[name] = iface
 }
 
 func (obj *exportedObj) DeleteInterface(name string) {
+	obj.mu.Lock()
+	defer obj.mu.Unlock()
 	delete(obj.interfaces, name)
 }
 
 func (obj *exportedObj) LookupMethod(name string) (Method, bool) {
+	obj.mu.RLock()
+	defer obj.mu.RUnlock()
 	for _, intf := range obj.interfaces {
 		method, exists := intf.LookupMethod(name)
 		if exists {
@@ -220,8 +231,12 @@ func (obj *exportedIntf) isFallbackInterface() bool {
 //NewDefaultSignalHandler returns an instance of the default
 //signal handler. This is useful if you want to implement only
 //one of the two handlers but not both.
+//
+// Deprecated: this is the default value, don't use it, it will be unexported.
 func NewDefaultSignalHandler() *defaultSignalHandler {
-	return &defaultSignalHandler{}
+	return &defaultSignalHandler{
+		closeChan: make(chan struct{}),
+	}
 }
 
 func isDefaultSignalHandler(handler SignalHandler) bool {
@@ -231,32 +246,47 @@ func isDefaultSignalHandler(handler SignalHandler) bool {
 
 type defaultSignalHandler struct {
 	sync.RWMutex
-	closed  bool
-	signals []chan<- *Signal
+	closed    bool
+	signals   []chan<- *Signal
+	closeChan chan struct{}
 }
 
 func (sh *defaultSignalHandler) DeliverSignal(intf, name string, signal *Signal) {
-	go func() {
-		sh.RLock()
-		defer sh.RUnlock()
-		if sh.closed {
+	sh.RLock()
+	defer sh.RUnlock()
+	if sh.closed {
+		return
+	}
+	for _, ch := range sh.signals {
+		select {
+		case ch <- signal:
+		case <-sh.closeChan:
 			return
+		default:
+			go func() {
+				select {
+				case ch <- signal:
+				case <-sh.closeChan:
+					return
+				}
+			}()
 		}
-		for _, ch := range sh.signals {
-			ch <- signal
-		}
-	}()
+	}
 }
 
 func (sh *defaultSignalHandler) Init() error {
 	sh.Lock()
 	sh.signals = make([]chan<- *Signal, 0)
+	sh.closeChan = make(chan struct{})
 	sh.Unlock()
 	return nil
 }
 
 func (sh *defaultSignalHandler) Terminate() {
 	sh.Lock()
+	if !sh.closed {
+		close(sh.closeChan)
+	}
 	sh.closed = true
 	for _, ch := range sh.signals {
 		close(ch)
diff --git a/vendor/github.com/godbus/dbus/export.go b/vendor/github.com/godbus/dbus/export.go
index aae970881..95d0e2958 100644
--- a/vendor/github.com/godbus/dbus/export.go
+++ b/vendor/github.com/godbus/dbus/export.go
@@ -170,11 +170,8 @@ func (conn *Conn) handleCall(msg *Message) {
 			reply.Body[i] = ret[i]
 		}
 		reply.Headers[FieldSignature] = MakeVariant(SignatureOf(reply.Body...))
-		conn.outLck.RLock()
-		if !conn.closed {
-			conn.out <- reply
-		}
-		conn.outLck.RUnlock()
+
+		conn.sendMessage(reply)
 	}
 }
 
@@ -207,12 +204,14 @@ func (conn *Conn) Emit(path ObjectPath, name string, values ...interface{}) erro
 	if len(values) > 0 {
 		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(values...))
 	}
-	conn.outLck.RLock()
-	defer conn.outLck.RUnlock()
-	if conn.closed {
+
+	var closed bool
+	conn.sendMessageAndIfClosed(msg, func() {
+		closed = true
+	})
+	if closed {
 		return ErrClosed
 	}
-	conn.out <- msg
 	return nil
 }
 
diff --git a/vendor/github.com/godbus/dbus/go.mod b/vendor/github.com/godbus/dbus/go.mod
new file mode 100644
index 000000000..bdcd12598
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/go.mod
@@ -0,0 +1 @@
+module github.com/godbus/dbus
diff --git a/vendor/github.com/godbus/dbus/object.go b/vendor/github.com/godbus/dbus/object.go
index 6d95583d7..f27ffe144 100644
--- a/vendor/github.com/godbus/dbus/object.go
+++ b/vendor/github.com/godbus/dbus/object.go
@@ -1,6 +1,7 @@
 package dbus
 
 import (
+	"context"
 	"errors"
 	"strings"
 )
@@ -9,7 +10,11 @@ import (
 // invoked.
 type BusObject interface {
 	Call(method string, flags Flags, args ...interface{}) *Call
+	CallWithContext(ctx context.Context, method string, flags Flags, args ...interface{}) *Call
 	Go(method string, flags Flags, ch chan *Call, args ...interface{}) *Call
+	GoWithContext(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call
+	AddMatchSignal(iface, member string, options ...MatchOption) *Call
+	RemoveMatchSignal(iface, member string, options ...MatchOption) *Call
 	GetProperty(p string) (Variant, error)
 	Destination() string
 	Path() ObjectPath
@@ -24,16 +29,73 @@ type Object struct {
 
 // Call calls a method with (*Object).Go and waits for its reply.
 func (o *Object) Call(method string, flags Flags, args ...interface{}) *Call {
-	return <-o.Go(method, flags, make(chan *Call, 1), args...).Done
+	return <-o.createCall(context.Background(), method, flags, make(chan *Call, 1), args...).Done
 }
 
-// AddMatchSignal subscribes BusObject to signals from specified interface and
-// method (member).
-func (o *Object) AddMatchSignal(iface, member string) *Call {
-	return o.Call(
+// CallWithContext acts like Call but takes a context
+func (o *Object) CallWithContext(ctx context.Context, method string, flags Flags, args ...interface{}) *Call {
+	return <-o.createCall(ctx, method, flags, make(chan *Call, 1), args...).Done
+}
+
+// MatchOption specifies option for dbus routing match rule. Options can be constructed with WithMatch* helpers.
+// For full list of available options consult
+// https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules
+type MatchOption struct {
+	key   string
+	value string
+}
+
+// WithMatchOption creates match option with given key and value
+func WithMatchOption(key, value string) MatchOption {
+	return MatchOption{key, value}
+}
+
+// WithMatchObjectPath creates match option that filters events based on given path
+func WithMatchObjectPath(path ObjectPath) MatchOption {
+	return MatchOption{"path", string(path)}
+}
+
+func formatMatchOptions(options []MatchOption) string {
+	items := make([]string, 0, len(options))
+	for _, option := range options {
+		items = append(items, option.key+"='"+option.value+"'")
+	}
+
+	return strings.Join(items, ",")
+}
+
+// AddMatchSignal subscribes BusObject to signals from specified interface,
+// method (member). Additional filter rules can be added via WithMatch* option constructors.
+// Note: To filter events by object path you have to specify this path via an option.
+func (o *Object) AddMatchSignal(iface, member string, options ...MatchOption) *Call {
+	base := []MatchOption{
+		{"type", "signal"},
+		{"interface", iface},
+		{"member", member},
+	}
+
+	options = append(base, options...)
+	return o.conn.BusObject().Call(
 		"org.freedesktop.DBus.AddMatch",
 		0,
-		"type='signal',interface='"+iface+"',member='"+member+"'",
+		formatMatchOptions(options),
+	)
+}
+
+// RemoveMatchSignal unsubscribes BusObject from signals from specified interface,
+// method (member). Additional filter rules can be added via WithMatch* option constructors
+func (o *Object) RemoveMatchSignal(iface, member string, options ...MatchOption) *Call {
+	base := []MatchOption{
+		{"type", "signal"},
+		{"interface", iface},
+		{"member", member},
+	}
+
+	options = append(base, options...)
+	return o.conn.BusObject().Call(
+		"org.freedesktop.DBus.RemoveMatch",
+		0,
+		formatMatchOptions(options),
 	)
 }
 
@@ -49,6 +111,18 @@ func (o *Object) AddMatchSignal(iface, member string) *Call {
 // If the method parameter contains a dot ('.'), the part before the last dot
 // specifies the interface on which the method is called.
 func (o *Object) Go(method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	return o.createCall(context.Background(), method, flags, ch, args...)
+}
+
+// GoWithContext acts like Go but takes a context
+func (o *Object) GoWithContext(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	return o.createCall(ctx, method, flags, ch, args...)
+}
+
+func (o *Object) createCall(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	if ctx == nil {
+		panic("nil context")
+	}
 	iface := ""
 	i := strings.LastIndex(method, ".")
 	if i != -1 {
@@ -76,28 +150,28 @@ func (o *Object) Go(method string, flags Flags, ch chan *Call, args ...interface
 		} else if cap(ch) == 0 {
 			panic("dbus: unbuffered channel passed to (*Object).Go")
 		}
+		ctx, cancel := context.WithCancel(ctx)
 		call := &Call{
 			Destination: o.dest,
 			Path:        o.path,
 			Method:      method,
 			Args:        args,
 			Done:        ch,
+			ctxCanceler: cancel,
+			ctx:         ctx,
 		}
-		o.conn.callsLck.Lock()
-		o.conn.calls[msg.serial] = call
-		o.conn.callsLck.Unlock()
-		o.conn.outLck.RLock()
-		if o.conn.closed {
-			call.Err = ErrClosed
-			call.Done <- call
-		} else {
-			o.conn.out <- msg
-		}
-		o.conn.outLck.RUnlock()
+		o.conn.calls.track(msg.serial, call)
+		o.conn.sendMessageAndIfClosed(msg, func() {
+			o.conn.calls.handleSendError(msg, ErrClosed)
+			cancel()
+		})
+		go func() {
+			<-ctx.Done()
+			o.conn.calls.handleSendError(msg, ctx.Err())
+		}()
+
 		return call
 	}
-	o.conn.outLck.RLock()
-	defer o.conn.outLck.RUnlock()
 	done := make(chan *Call, 1)
 	call := &Call{
 		Err:  nil,
@@ -107,11 +181,9 @@ func (o *Object) Go(method string, flags Flags, ch chan *Call, args ...interface
 		call.Done <- call
 		close(done)
 	}()
-	if o.conn.closed {
+	o.conn.sendMessageAndIfClosed(msg, func() {
 		call.Err = ErrClosed
-		return call
-	}
-	o.conn.out <- msg
+	})
 	return call
 }
 
diff --git a/vendor/github.com/godbus/dbus/server_interfaces.go b/vendor/github.com/godbus/dbus/server_interfaces.go
index 091948aef..01166f0bd 100644
--- a/vendor/github.com/godbus/dbus/server_interfaces.go
+++ b/vendor/github.com/godbus/dbus/server_interfaces.go
@@ -87,3 +87,13 @@ type SignalHandler interface {
 type DBusError interface {
 	DBusError() (string, []interface{})
 }
+
+// SerialGenerator is responsible for serials generation.
+//
+// Different approaches for the serial generation can be used,
+// maintaining a map guarded with a mutex (the standard way) or
+// simply increment an atomic counter.
+type SerialGenerator interface {
+	GetSerial() uint32
+	RetireSerial(serial uint32)
+}
diff --git a/vendor/github.com/godbus/dbus/transport_generic.go b/vendor/github.com/godbus/dbus/transport_generic.go
index 3fad859a6..718a1ff02 100644
--- a/vendor/github.com/godbus/dbus/transport_generic.go
+++ b/vendor/github.com/godbus/dbus/transport_generic.go
@@ -11,7 +11,7 @@ var nativeEndian binary.ByteOrder
 
 func detectEndianness() binary.ByteOrder {
 	var x uint32 = 0x01020304
-		if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
+	if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
 		return binary.BigEndian
 	}
 	return binary.LittleEndian
diff --git a/vendor/github.com/godbus/dbus/transport_nonce_tcp.go b/vendor/github.com/godbus/dbus/transport_nonce_tcp.go
new file mode 100644
index 000000000..697739efa
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/transport_nonce_tcp.go
@@ -0,0 +1,39 @@
+//+build !windows
+
+package dbus
+
+import (
+	"errors"
+	"io/ioutil"
+	"net"
+)
+
+func init() {
+	transports["nonce-tcp"] = newNonceTcpTransport
+}
+
+func newNonceTcpTransport(keys string) (transport, error) {
+	host := getKey(keys, "host")
+	port := getKey(keys, "port")
+	noncefile := getKey(keys, "noncefile")
+	if host == "" || port == "" || noncefile == "" {
+		return nil, errors.New("dbus: unsupported address (must set host, port and noncefile)")
+	}
+	protocol, err := tcpFamily(keys)
+	if err != nil {
+		return nil, err
+	}
+	socket, err := net.Dial(protocol, net.JoinHostPort(host, port))
+	if err != nil {
+		return nil, err
+	}
+	b, err := ioutil.ReadFile(noncefile)
+	if err != nil {
+		return nil, err
+	}
+	_, err = socket.Write(b)
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(socket)
+}
diff --git a/vendor/github.com/godbus/dbus/transport_unix.go b/vendor/github.com/godbus/dbus/transport_unix.go
index e56d5ca90..f000c6b5d 100644
--- a/vendor/github.com/godbus/dbus/transport_unix.go
+++ b/vendor/github.com/godbus/dbus/transport_unix.go
@@ -31,6 +31,7 @@ func (o *oobReader) Read(b []byte) (n int, err error) {
 
 type unixTransport struct {
 	*net.UnixConn
+	rdr        *oobReader
 	hasUnixFDs bool
 }
 
@@ -79,10 +80,15 @@ func (t *unixTransport) ReadMessage() (*Message, error) {
 	// To be sure that all bytes of out-of-band data are read, we use a special
 	// reader that uses ReadUnix on the underlying connection instead of Read
 	// and gathers the out-of-band data in a buffer.
-	rd := &oobReader{conn: t.UnixConn}
+	if t.rdr == nil {
+		t.rdr = &oobReader{conn: t.UnixConn}
+	} else {
+		t.rdr.oob = nil
+	}
+
 	// read the first 16 bytes (the part of the header that has a constant size),
 	// from which we can figure out the length of the rest of the message
-	if _, err := io.ReadFull(rd, csheader[:]); err != nil {
+	if _, err := io.ReadFull(t.rdr, csheader[:]); err != nil {
 		return nil, err
 	}
 	switch csheader[0] {
@@ -104,7 +110,7 @@ func (t *unixTransport) ReadMessage() (*Message, error) {
 	// decode headers and look for unix fds
 	headerdata := make([]byte, hlen+4)
 	copy(headerdata, csheader[12:])
-	if _, err := io.ReadFull(t, headerdata[4:]); err != nil {
+	if _, err := io.ReadFull(t.rdr, headerdata[4:]); err != nil {
 		return nil, err
 	}
 	dec := newDecoder(bytes.NewBuffer(headerdata), order)
@@ -122,7 +128,7 @@ func (t *unixTransport) ReadMessage() (*Message, error) {
 	all := make([]byte, 16+hlen+blen)
 	copy(all, csheader[:])
 	copy(all[16:], headerdata[4:])
-	if _, err := io.ReadFull(rd, all[16+hlen:]); err != nil {
+	if _, err := io.ReadFull(t.rdr, all[16+hlen:]); err != nil {
 		return nil, err
 	}
 	if unixfds != 0 {
@@ -130,7 +136,7 @@ func (t *unixTransport) ReadMessage() (*Message, error) {
 			return nil, errors.New("dbus: got unix fds on unsupported transport")
 		}
 		// read the fds from the OOB data
-		scms, err := syscall.ParseSocketControlMessage(rd.oob)
+		scms, err := syscall.ParseSocketControlMessage(t.rdr.oob)
 		if err != nil {
 			return nil, err
 		}
@@ -148,11 +154,23 @@ func (t *unixTransport) ReadMessage() (*Message, error) {
 		// substitute the values in the message body (which are indices for the
 		// array receiver via OOB) with the actual values
 		for i, v := range msg.Body {
-			if j, ok := v.(UnixFDIndex); ok {
+			switch v.(type) {
+			case UnixFDIndex:
+				j := v.(UnixFDIndex)
 				if uint32(j) >= unixfds {
 					return nil, InvalidMessageError("invalid index for unix fd")
 				}
 				msg.Body[i] = UnixFD(fds[j])
+			case []UnixFDIndex:
+				idxArray := v.([]UnixFDIndex)
+				fdArray := make([]UnixFD, len(idxArray))
+				for k, j := range idxArray {
+					if uint32(j) >= unixfds {
+						return nil, InvalidMessageError("invalid index for unix fd")
+					}
+					fdArray[k] = UnixFD(fds[j])
+				}
+				msg.Body[i] = fdArray
 			}
 		}
 		return msg, nil
diff --git a/vendor/github.com/golang/glog/LICENSE b/vendor/github.com/golang/glog/LICENSE
deleted file mode 100644
index 37ec93a14..000000000
--- a/vendor/github.com/golang/glog/LICENSE
+++ /dev/null
@@ -1,191 +0,0 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-"License" shall mean the terms and conditions for use, reproduction, and
-distribution as defined by Sections 1 through 9 of this document.
-
-"Licensor" shall mean the copyright owner or entity authorized by the copyright
-owner that is granting the License.
-
-"Legal Entity" shall mean the union of the acting entity and all other entities
-that control, are controlled by, or are under common control with that entity.
-For the purposes of this definition, "control" means (i) the power, direct or
-indirect, to cause the direction or management of such entity, whether by
-contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the
-outstanding shares, or (iii) beneficial ownership of such entity.
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-"You" (or "Your") shall mean an individual or Legal Entity exercising
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-
-"Work" shall mean the work of authorship, whether in Source or Object form, made
-available under the License, as indicated by a copyright notice that is included
-in or attached to the work (an example is provided in the Appendix below).
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-"Derivative Works" shall mean any work, whether in Source or Object form, that
-is based on (or derived from) the Work and for which the editorial revisions,
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-
-"Contribution" shall mean any work of authorship, including the original version
-of the Work and any modifications or additions to that Work or Derivative Works
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-the NOTICE file are for informational purposes only and do not modify the
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-You distribute, alongside or as an addendum to the NOTICE text from the Work,
-provided that such additional attribution notices cannot be construed as
-modifying the License.
-You may add Your own copyright statement to Your modifications and may provide
-additional or different license terms and conditions for use, reproduction, or
-distribution of Your modifications, or for any such Derivative Works as a whole,
-provided Your use, reproduction, and distribution of the Work otherwise complies
-with the conditions stated in this License.
-
-5. Submission of Contributions.
-
-Unless You explicitly state otherwise, any Contribution intentionally submitted
-for inclusion in the Work by You to the Licensor shall be under the terms and
-conditions of this License, without any additional terms or conditions.
-Notwithstanding the above, nothing herein shall supersede or modify the terms of
-any separate license agreement you may have executed with Licensor regarding
-such Contributions.
-
-6. Trademarks.
-
-This License does not grant permission to use the trade names, trademarks,
-service marks, or product names of the Licensor, except as required for
-reasonable and customary use in describing the origin of the Work and
-reproducing the content of the NOTICE file.
-
-7. Disclaimer of Warranty.
-
-Unless required by applicable law or agreed to in writing, Licensor provides the
-Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
-including, without limitation, any warranties or conditions of TITLE,
-NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
-solely responsible for determining the appropriateness of using or
-redistributing the Work and assume any risks associated with Your exercise of
-permissions under this License.
-
-8. Limitation of Liability.
-
-In no event and under no legal theory, whether in tort (including negligence),
-contract, or otherwise, unless required by applicable law (such as deliberate
-and grossly negligent acts) or agreed to in writing, shall any Contributor be
-liable to You for damages, including any direct, indirect, special, incidental,
-or consequential damages of any character arising as a result of this License or
-out of the use or inability to use the Work (including but not limited to
-damages for loss of goodwill, work stoppage, computer failure or malfunction, or
-any and all other commercial damages or losses), even if such Contributor has
-been advised of the possibility of such damages.
-
-9. Accepting Warranty or Additional Liability.
-
-While redistributing the Work or Derivative Works thereof, You may choose to
-offer, and charge a fee for, acceptance of support, warranty, indemnity, or
-other liability obligations and/or rights consistent with this License. However,
-in accepting such obligations, You may act only on Your own behalf and on Your
-sole responsibility, not on behalf of any other Contributor, and only if You
-agree to indemnify, defend, and hold each Contributor harmless for any liability
-incurred by, or claims asserted against, such Contributor by reason of your
-accepting any such warranty or additional liability.
-
-END OF TERMS AND CONDITIONS
-
-APPENDIX: How to apply the Apache License to your work
-
-To apply the Apache License to your work, attach the following boilerplate
-notice, with the fields enclosed by brackets "[]" replaced with your own
-identifying information. (Don't include the brackets!) The text should be
-enclosed in the appropriate comment syntax for the file format. We also
-recommend that a file or class name and description of purpose be included on
-the same "printed page" as the copyright notice for easier identification within
-third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/vendor/github.com/golang/glog/README b/vendor/github.com/golang/glog/README
deleted file mode 100644
index 387b4eb68..000000000
--- a/vendor/github.com/golang/glog/README
+++ /dev/null
@@ -1,44 +0,0 @@
-glog
-====
-
-Leveled execution logs for Go.
-
-This is an efficient pure Go implementation of leveled logs in the
-manner of the open source C++ package
-	https://github.com/google/glog
-
-By binding methods to booleans it is possible to use the log package
-without paying the expense of evaluating the arguments to the log.
-Through the -vmodule flag, the package also provides fine-grained
-control over logging at the file level.
-
-The comment from glog.go introduces the ideas:
-
-	Package glog implements logging analogous to the Google-internal
-	C++ INFO/ERROR/V setup.  It provides functions Info, Warning,
-	Error, Fatal, plus formatting variants such as Infof. It
-	also provides V-style logging controlled by the -v and
-	-vmodule=file=2 flags.
-	
-	Basic examples:
-	
-		glog.Info("Prepare to repel boarders")
-	
-		glog.Fatalf("Initialization failed: %s", err)
-	
-	See the documentation for the V function for an explanation
-	of these examples:
-	
-		if glog.V(2) {
-			glog.Info("Starting transaction...")
-		}
-	
-		glog.V(2).Infoln("Processed", nItems, "elements")
-
-
-The repository contains an open source version of the log package
-used inside Google. The master copy of the source lives inside
-Google, not here. The code in this repo is for export only and is not itself
-under development. Feature requests will be ignored.
-
-Send bug reports to golang-nuts@googlegroups.com.
diff --git a/vendor/github.com/golang/glog/glog.go b/vendor/github.com/golang/glog/glog.go
deleted file mode 100644
index 54bd7afdc..000000000
--- a/vendor/github.com/golang/glog/glog.go
+++ /dev/null
@@ -1,1180 +0,0 @@
-// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
-//
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
-// It provides functions Info, Warning, Error, Fatal, plus formatting variants such as
-// Infof. It also provides V-style logging controlled by the -v and -vmodule=file=2 flags.
-//
-// Basic examples:
-//
-//	glog.Info("Prepare to repel boarders")
-//
-//	glog.Fatalf("Initialization failed: %s", err)
-//
-// See the documentation for the V function for an explanation of these examples:
-//
-//	if glog.V(2) {
-//		glog.Info("Starting transaction...")
-//	}
-//
-//	glog.V(2).Infoln("Processed", nItems, "elements")
-//
-// Log output is buffered and written periodically using Flush. Programs
-// should call Flush before exiting to guarantee all log output is written.
-//
-// By default, all log statements write to files in a temporary directory.
-// This package provides several flags that modify this behavior.
-// As a result, flag.Parse must be called before any logging is done.
-//
-//	-logtostderr=false
-//		Logs are written to standard error instead of to files.
-//	-alsologtostderr=false
-//		Logs are written to standard error as well as to files.
-//	-stderrthreshold=ERROR
-//		Log events at or above this severity are logged to standard
-//		error as well as to files.
-//	-log_dir=""
-//		Log files will be written to this directory instead of the
-//		default temporary directory.
-//
-//	Other flags provide aids to debugging.
-//
-//	-log_backtrace_at=""
-//		When set to a file and line number holding a logging statement,
-//		such as
-//			-log_backtrace_at=gopherflakes.go:234
-//		a stack trace will be written to the Info log whenever execution
-//		hits that statement. (Unlike with -vmodule, the ".go" must be
-//		present.)
-//	-v=0
-//		Enable V-leveled logging at the specified level.
-//	-vmodule=""
-//		The syntax of the argument is a comma-separated list of pattern=N,
-//		where pattern is a literal file name (minus the ".go" suffix) or
-//		"glob" pattern and N is a V level. For instance,
-//			-vmodule=gopher*=3
-//		sets the V level to 3 in all Go files whose names begin "gopher".
-//
-package glog
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"flag"
-	"fmt"
-	"io"
-	stdLog "log"
-	"os"
-	"path/filepath"
-	"runtime"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"time"
-)
-
-// severity identifies the sort of log: info, warning etc. It also implements
-// the flag.Value interface. The -stderrthreshold flag is of type severity and
-// should be modified only through the flag.Value interface. The values match
-// the corresponding constants in C++.
-type severity int32 // sync/atomic int32
-
-// These constants identify the log levels in order of increasing severity.
-// A message written to a high-severity log file is also written to each
-// lower-severity log file.
-const (
-	infoLog severity = iota
-	warningLog
-	errorLog
-	fatalLog
-	numSeverity = 4
-)
-
-const severityChar = "IWEF"
-
-var severityName = []string{
-	infoLog:    "INFO",
-	warningLog: "WARNING",
-	errorLog:   "ERROR",
-	fatalLog:   "FATAL",
-}
-
-// get returns the value of the severity.
-func (s *severity) get() severity {
-	return severity(atomic.LoadInt32((*int32)(s)))
-}
-
-// set sets the value of the severity.
-func (s *severity) set(val severity) {
-	atomic.StoreInt32((*int32)(s), int32(val))
-}
-
-// String is part of the flag.Value interface.
-func (s *severity) String() string {
-	return strconv.FormatInt(int64(*s), 10)
-}
-
-// Get is part of the flag.Value interface.
-func (s *severity) Get() interface{} {
-	return *s
-}
-
-// Set is part of the flag.Value interface.
-func (s *severity) Set(value string) error {
-	var threshold severity
-	// Is it a known name?
-	if v, ok := severityByName(value); ok {
-		threshold = v
-	} else {
-		v, err := strconv.Atoi(value)
-		if err != nil {
-			return err
-		}
-		threshold = severity(v)
-	}
-	logging.stderrThreshold.set(threshold)
-	return nil
-}
-
-func severityByName(s string) (severity, bool) {
-	s = strings.ToUpper(s)
-	for i, name := range severityName {
-		if name == s {
-			return severity(i), true
-		}
-	}
-	return 0, false
-}
-
-// OutputStats tracks the number of output lines and bytes written.
-type OutputStats struct {
-	lines int64
-	bytes int64
-}
-
-// Lines returns the number of lines written.
-func (s *OutputStats) Lines() int64 {
-	return atomic.LoadInt64(&s.lines)
-}
-
-// Bytes returns the number of bytes written.
-func (s *OutputStats) Bytes() int64 {
-	return atomic.LoadInt64(&s.bytes)
-}
-
-// Stats tracks the number of lines of output and number of bytes
-// per severity level. Values must be read with atomic.LoadInt64.
-var Stats struct {
-	Info, Warning, Error OutputStats
-}
-
-var severityStats = [numSeverity]*OutputStats{
-	infoLog:    &Stats.Info,
-	warningLog: &Stats.Warning,
-	errorLog:   &Stats.Error,
-}
-
-// Level is exported because it appears in the arguments to V and is
-// the type of the v flag, which can be set programmatically.
-// It's a distinct type because we want to discriminate it from logType.
-// Variables of type level are only changed under logging.mu.
-// The -v flag is read only with atomic ops, so the state of the logging
-// module is consistent.
-
-// Level is treated as a sync/atomic int32.
-
-// Level specifies a level of verbosity for V logs. *Level implements
-// flag.Value; the -v flag is of type Level and should be modified
-// only through the flag.Value interface.
-type Level int32
-
-// get returns the value of the Level.
-func (l *Level) get() Level {
-	return Level(atomic.LoadInt32((*int32)(l)))
-}
-
-// set sets the value of the Level.
-func (l *Level) set(val Level) {
-	atomic.StoreInt32((*int32)(l), int32(val))
-}
-
-// String is part of the flag.Value interface.
-func (l *Level) String() string {
-	return strconv.FormatInt(int64(*l), 10)
-}
-
-// Get is part of the flag.Value interface.
-func (l *Level) Get() interface{} {
-	return *l
-}
-
-// Set is part of the flag.Value interface.
-func (l *Level) Set(value string) error {
-	v, err := strconv.Atoi(value)
-	if err != nil {
-		return err
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	logging.setVState(Level(v), logging.vmodule.filter, false)
-	return nil
-}
-
-// moduleSpec represents the setting of the -vmodule flag.
-type moduleSpec struct {
-	filter []modulePat
-}
-
-// modulePat contains a filter for the -vmodule flag.
-// It holds a verbosity level and a file pattern to match.
-type modulePat struct {
-	pattern string
-	literal bool // The pattern is a literal string
-	level   Level
-}
-
-// match reports whether the file matches the pattern. It uses a string
-// comparison if the pattern contains no metacharacters.
-func (m *modulePat) match(file string) bool {
-	if m.literal {
-		return file == m.pattern
-	}
-	match, _ := filepath.Match(m.pattern, file)
-	return match
-}
-
-func (m *moduleSpec) String() string {
-	// Lock because the type is not atomic. TODO: clean this up.
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	var b bytes.Buffer
-	for i, f := range m.filter {
-		if i > 0 {
-			b.WriteRune(',')
-		}
-		fmt.Fprintf(&b, "%s=%d", f.pattern, f.level)
-	}
-	return b.String()
-}
-
-// Get is part of the (Go 1.2)  flag.Getter interface. It always returns nil for this flag type since the
-// struct is not exported.
-func (m *moduleSpec) Get() interface{} {
-	return nil
-}
-
-var errVmoduleSyntax = errors.New("syntax error: expect comma-separated list of filename=N")
-
-// Syntax: -vmodule=recordio=2,file=1,gfs*=3
-func (m *moduleSpec) Set(value string) error {
-	var filter []modulePat
-	for _, pat := range strings.Split(value, ",") {
-		if len(pat) == 0 {
-			// Empty strings such as from a trailing comma can be ignored.
-			continue
-		}
-		patLev := strings.Split(pat, "=")
-		if len(patLev) != 2 || len(patLev[0]) == 0 || len(patLev[1]) == 0 {
-			return errVmoduleSyntax
-		}
-		pattern := patLev[0]
-		v, err := strconv.Atoi(patLev[1])
-		if err != nil {
-			return errors.New("syntax error: expect comma-separated list of filename=N")
-		}
-		if v < 0 {
-			return errors.New("negative value for vmodule level")
-		}
-		if v == 0 {
-			continue // Ignore. It's harmless but no point in paying the overhead.
-		}
-		// TODO: check syntax of filter?
-		filter = append(filter, modulePat{pattern, isLiteral(pattern), Level(v)})
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	logging.setVState(logging.verbosity, filter, true)
-	return nil
-}
-
-// isLiteral reports whether the pattern is a literal string, that is, has no metacharacters
-// that require filepath.Match to be called to match the pattern.
-func isLiteral(pattern string) bool {
-	return !strings.ContainsAny(pattern, `\*?[]`)
-}
-
-// traceLocation represents the setting of the -log_backtrace_at flag.
-type traceLocation struct {
-	file string
-	line int
-}
-
-// isSet reports whether the trace location has been specified.
-// logging.mu is held.
-func (t *traceLocation) isSet() bool {
-	return t.line > 0
-}
-
-// match reports whether the specified file and line matches the trace location.
-// The argument file name is the full path, not the basename specified in the flag.
-// logging.mu is held.
-func (t *traceLocation) match(file string, line int) bool {
-	if t.line != line {
-		return false
-	}
-	if i := strings.LastIndex(file, "/"); i >= 0 {
-		file = file[i+1:]
-	}
-	return t.file == file
-}
-
-func (t *traceLocation) String() string {
-	// Lock because the type is not atomic. TODO: clean this up.
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	return fmt.Sprintf("%s:%d", t.file, t.line)
-}
-
-// Get is part of the (Go 1.2) flag.Getter interface. It always returns nil for this flag type since the
-// struct is not exported
-func (t *traceLocation) Get() interface{} {
-	return nil
-}
-
-var errTraceSyntax = errors.New("syntax error: expect file.go:234")
-
-// Syntax: -log_backtrace_at=gopherflakes.go:234
-// Note that unlike vmodule the file extension is included here.
-func (t *traceLocation) Set(value string) error {
-	if value == "" {
-		// Unset.
-		t.line = 0
-		t.file = ""
-	}
-	fields := strings.Split(value, ":")
-	if len(fields) != 2 {
-		return errTraceSyntax
-	}
-	file, line := fields[0], fields[1]
-	if !strings.Contains(file, ".") {
-		return errTraceSyntax
-	}
-	v, err := strconv.Atoi(line)
-	if err != nil {
-		return errTraceSyntax
-	}
-	if v <= 0 {
-		return errors.New("negative or zero value for level")
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	t.line = v
-	t.file = file
-	return nil
-}
-
-// flushSyncWriter is the interface satisfied by logging destinations.
-type flushSyncWriter interface {
-	Flush() error
-	Sync() error
-	io.Writer
-}
-
-func init() {
-	flag.BoolVar(&logging.toStderr, "logtostderr", false, "log to standard error instead of files")
-	flag.BoolVar(&logging.alsoToStderr, "alsologtostderr", false, "log to standard error as well as files")
-	flag.Var(&logging.verbosity, "v", "log level for V logs")
-	flag.Var(&logging.stderrThreshold, "stderrthreshold", "logs at or above this threshold go to stderr")
-	flag.Var(&logging.vmodule, "vmodule", "comma-separated list of pattern=N settings for file-filtered logging")
-	flag.Var(&logging.traceLocation, "log_backtrace_at", "when logging hits line file:N, emit a stack trace")
-
-	// Default stderrThreshold is ERROR.
-	logging.stderrThreshold = errorLog
-
-	logging.setVState(0, nil, false)
-	go logging.flushDaemon()
-}
-
-// Flush flushes all pending log I/O.
-func Flush() {
-	logging.lockAndFlushAll()
-}
-
-// loggingT collects all the global state of the logging setup.
-type loggingT struct {
-	// Boolean flags. Not handled atomically because the flag.Value interface
-	// does not let us avoid the =true, and that shorthand is necessary for
-	// compatibility. TODO: does this matter enough to fix? Seems unlikely.
-	toStderr     bool // The -logtostderr flag.
-	alsoToStderr bool // The -alsologtostderr flag.
-
-	// Level flag. Handled atomically.
-	stderrThreshold severity // The -stderrthreshold flag.
-
-	// freeList is a list of byte buffers, maintained under freeListMu.
-	freeList *buffer
-	// freeListMu maintains the free list. It is separate from the main mutex
-	// so buffers can be grabbed and printed to without holding the main lock,
-	// for better parallelization.
-	freeListMu sync.Mutex
-
-	// mu protects the remaining elements of this structure and is
-	// used to synchronize logging.
-	mu sync.Mutex
-	// file holds writer for each of the log types.
-	file [numSeverity]flushSyncWriter
-	// pcs is used in V to avoid an allocation when computing the caller's PC.
-	pcs [1]uintptr
-	// vmap is a cache of the V Level for each V() call site, identified by PC.
-	// It is wiped whenever the vmodule flag changes state.
-	vmap map[uintptr]Level
-	// filterLength stores the length of the vmodule filter chain. If greater
-	// than zero, it means vmodule is enabled. It may be read safely
-	// using sync.LoadInt32, but is only modified under mu.
-	filterLength int32
-	// traceLocation is the state of the -log_backtrace_at flag.
-	traceLocation traceLocation
-	// These flags are modified only under lock, although verbosity may be fetched
-	// safely using atomic.LoadInt32.
-	vmodule   moduleSpec // The state of the -vmodule flag.
-	verbosity Level      // V logging level, the value of the -v flag/
-}
-
-// buffer holds a byte Buffer for reuse. The zero value is ready for use.
-type buffer struct {
-	bytes.Buffer
-	tmp  [64]byte // temporary byte array for creating headers.
-	next *buffer
-}
-
-var logging loggingT
-
-// setVState sets a consistent state for V logging.
-// l.mu is held.
-func (l *loggingT) setVState(verbosity Level, filter []modulePat, setFilter bool) {
-	// Turn verbosity off so V will not fire while we are in transition.
-	logging.verbosity.set(0)
-	// Ditto for filter length.
-	atomic.StoreInt32(&logging.filterLength, 0)
-
-	// Set the new filters and wipe the pc->Level map if the filter has changed.
-	if setFilter {
-		logging.vmodule.filter = filter
-		logging.vmap = make(map[uintptr]Level)
-	}
-
-	// Things are consistent now, so enable filtering and verbosity.
-	// They are enabled in order opposite to that in V.
-	atomic.StoreInt32(&logging.filterLength, int32(len(filter)))
-	logging.verbosity.set(verbosity)
-}
-
-// getBuffer returns a new, ready-to-use buffer.
-func (l *loggingT) getBuffer() *buffer {
-	l.freeListMu.Lock()
-	b := l.freeList
-	if b != nil {
-		l.freeList = b.next
-	}
-	l.freeListMu.Unlock()
-	if b == nil {
-		b = new(buffer)
-	} else {
-		b.next = nil
-		b.Reset()
-	}
-	return b
-}
-
-// putBuffer returns a buffer to the free list.
-func (l *loggingT) putBuffer(b *buffer) {
-	if b.Len() >= 256 {
-		// Let big buffers die a natural death.
-		return
-	}
-	l.freeListMu.Lock()
-	b.next = l.freeList
-	l.freeList = b
-	l.freeListMu.Unlock()
-}
-
-var timeNow = time.Now // Stubbed out for testing.
-
-/*
-header formats a log header as defined by the C++ implementation.
-It returns a buffer containing the formatted header and the user's file and line number.
-The depth specifies how many stack frames above lives the source line to be identified in the log message.
-
-Log lines have this form:
-	Lmmdd hh:mm:ss.uuuuuu threadid file:line] msg...
-where the fields are defined as follows:
-	L                A single character, representing the log level (eg 'I' for INFO)
-	mm               The month (zero padded; ie May is '05')
-	dd               The day (zero padded)
-	hh:mm:ss.uuuuuu  Time in hours, minutes and fractional seconds
-	threadid         The space-padded thread ID as returned by GetTID()
-	file             The file name
-	line             The line number
-	msg              The user-supplied message
-*/
-func (l *loggingT) header(s severity, depth int) (*buffer, string, int) {
-	_, file, line, ok := runtime.Caller(3 + depth)
-	if !ok {
-		file = "???"
-		line = 1
-	} else {
-		slash := strings.LastIndex(file, "/")
-		if slash >= 0 {
-			file = file[slash+1:]
-		}
-	}
-	return l.formatHeader(s, file, line), file, line
-}
-
-// formatHeader formats a log header using the provided file name and line number.
-func (l *loggingT) formatHeader(s severity, file string, line int) *buffer {
-	now := timeNow()
-	if line < 0 {
-		line = 0 // not a real line number, but acceptable to someDigits
-	}
-	if s > fatalLog {
-		s = infoLog // for safety.
-	}
-	buf := l.getBuffer()
-
-	// Avoid Fprintf, for speed. The format is so simple that we can do it quickly by hand.
-	// It's worth about 3X. Fprintf is hard.
-	_, month, day := now.Date()
-	hour, minute, second := now.Clock()
-	// Lmmdd hh:mm:ss.uuuuuu threadid file:line]
-	buf.tmp[0] = severityChar[s]
-	buf.twoDigits(1, int(month))
-	buf.twoDigits(3, day)
-	buf.tmp[5] = ' '
-	buf.twoDigits(6, hour)
-	buf.tmp[8] = ':'
-	buf.twoDigits(9, minute)
-	buf.tmp[11] = ':'
-	buf.twoDigits(12, second)
-	buf.tmp[14] = '.'
-	buf.nDigits(6, 15, now.Nanosecond()/1000, '0')
-	buf.tmp[21] = ' '
-	buf.nDigits(7, 22, pid, ' ') // TODO: should be TID
-	buf.tmp[29] = ' '
-	buf.Write(buf.tmp[:30])
-	buf.WriteString(file)
-	buf.tmp[0] = ':'
-	n := buf.someDigits(1, line)
-	buf.tmp[n+1] = ']'
-	buf.tmp[n+2] = ' '
-	buf.Write(buf.tmp[:n+3])
-	return buf
-}
-
-// Some custom tiny helper functions to print the log header efficiently.
-
-const digits = "0123456789"
-
-// twoDigits formats a zero-prefixed two-digit integer at buf.tmp[i].
-func (buf *buffer) twoDigits(i, d int) {
-	buf.tmp[i+1] = digits[d%10]
-	d /= 10
-	buf.tmp[i] = digits[d%10]
-}
-
-// nDigits formats an n-digit integer at buf.tmp[i],
-// padding with pad on the left.
-// It assumes d >= 0.
-func (buf *buffer) nDigits(n, i, d int, pad byte) {
-	j := n - 1
-	for ; j >= 0 && d > 0; j-- {
-		buf.tmp[i+j] = digits[d%10]
-		d /= 10
-	}
-	for ; j >= 0; j-- {
-		buf.tmp[i+j] = pad
-	}
-}
-
-// someDigits formats a zero-prefixed variable-width integer at buf.tmp[i].
-func (buf *buffer) someDigits(i, d int) int {
-	// Print into the top, then copy down. We know there's space for at least
-	// a 10-digit number.
-	j := len(buf.tmp)
-	for {
-		j--
-		buf.tmp[j] = digits[d%10]
-		d /= 10
-		if d == 0 {
-			break
-		}
-	}
-	return copy(buf.tmp[i:], buf.tmp[j:])
-}
-
-func (l *loggingT) println(s severity, args ...interface{}) {
-	buf, file, line := l.header(s, 0)
-	fmt.Fprintln(buf, args...)
-	l.output(s, buf, file, line, false)
-}
-
-func (l *loggingT) print(s severity, args ...interface{}) {
-	l.printDepth(s, 1, args...)
-}
-
-func (l *loggingT) printDepth(s severity, depth int, args ...interface{}) {
-	buf, file, line := l.header(s, depth)
-	fmt.Fprint(buf, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, false)
-}
-
-func (l *loggingT) printf(s severity, format string, args ...interface{}) {
-	buf, file, line := l.header(s, 0)
-	fmt.Fprintf(buf, format, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, false)
-}
-
-// printWithFileLine behaves like print but uses the provided file and line number.  If
-// alsoLogToStderr is true, the log message always appears on standard error; it
-// will also appear in the log file unless --logtostderr is set.
-func (l *loggingT) printWithFileLine(s severity, file string, line int, alsoToStderr bool, args ...interface{}) {
-	buf := l.formatHeader(s, file, line)
-	fmt.Fprint(buf, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, alsoToStderr)
-}
-
-// output writes the data to the log files and releases the buffer.
-func (l *loggingT) output(s severity, buf *buffer, file string, line int, alsoToStderr bool) {
-	l.mu.Lock()
-	if l.traceLocation.isSet() {
-		if l.traceLocation.match(file, line) {
-			buf.Write(stacks(false))
-		}
-	}
-	data := buf.Bytes()
-	if !flag.Parsed() {
-		os.Stderr.Write([]byte("ERROR: logging before flag.Parse: "))
-		os.Stderr.Write(data)
-	} else if l.toStderr {
-		os.Stderr.Write(data)
-	} else {
-		if alsoToStderr || l.alsoToStderr || s >= l.stderrThreshold.get() {
-			os.Stderr.Write(data)
-		}
-		if l.file[s] == nil {
-			if err := l.createFiles(s); err != nil {
-				os.Stderr.Write(data) // Make sure the message appears somewhere.
-				l.exit(err)
-			}
-		}
-		switch s {
-		case fatalLog:
-			l.file[fatalLog].Write(data)
-			fallthrough
-		case errorLog:
-			l.file[errorLog].Write(data)
-			fallthrough
-		case warningLog:
-			l.file[warningLog].Write(data)
-			fallthrough
-		case infoLog:
-			l.file[infoLog].Write(data)
-		}
-	}
-	if s == fatalLog {
-		// If we got here via Exit rather than Fatal, print no stacks.
-		if atomic.LoadUint32(&fatalNoStacks) > 0 {
-			l.mu.Unlock()
-			timeoutFlush(10 * time.Second)
-			os.Exit(1)
-		}
-		// Dump all goroutine stacks before exiting.
-		// First, make sure we see the trace for the current goroutine on standard error.
-		// If -logtostderr has been specified, the loop below will do that anyway
-		// as the first stack in the full dump.
-		if !l.toStderr {
-			os.Stderr.Write(stacks(false))
-		}
-		// Write the stack trace for all goroutines to the files.
-		trace := stacks(true)
-		logExitFunc = func(error) {} // If we get a write error, we'll still exit below.
-		for log := fatalLog; log >= infoLog; log-- {
-			if f := l.file[log]; f != nil { // Can be nil if -logtostderr is set.
-				f.Write(trace)
-			}
-		}
-		l.mu.Unlock()
-		timeoutFlush(10 * time.Second)
-		os.Exit(255) // C++ uses -1, which is silly because it's anded with 255 anyway.
-	}
-	l.putBuffer(buf)
-	l.mu.Unlock()
-	if stats := severityStats[s]; stats != nil {
-		atomic.AddInt64(&stats.lines, 1)
-		atomic.AddInt64(&stats.bytes, int64(len(data)))
-	}
-}
-
-// timeoutFlush calls Flush and returns when it completes or after timeout
-// elapses, whichever happens first.  This is needed because the hooks invoked
-// by Flush may deadlock when glog.Fatal is called from a hook that holds
-// a lock.
-func timeoutFlush(timeout time.Duration) {
-	done := make(chan bool, 1)
-	go func() {
-		Flush() // calls logging.lockAndFlushAll()
-		done <- true
-	}()
-	select {
-	case <-done:
-	case <-time.After(timeout):
-		fmt.Fprintln(os.Stderr, "glog: Flush took longer than", timeout)
-	}
-}
-
-// stacks is a wrapper for runtime.Stack that attempts to recover the data for all goroutines.
-func stacks(all bool) []byte {
-	// We don't know how big the traces are, so grow a few times if they don't fit. Start large, though.
-	n := 10000
-	if all {
-		n = 100000
-	}
-	var trace []byte
-	for i := 0; i < 5; i++ {
-		trace = make([]byte, n)
-		nbytes := runtime.Stack(trace, all)
-		if nbytes < len(trace) {
-			return trace[:nbytes]
-		}
-		n *= 2
-	}
-	return trace
-}
-
-// logExitFunc provides a simple mechanism to override the default behavior
-// of exiting on error. Used in testing and to guarantee we reach a required exit
-// for fatal logs. Instead, exit could be a function rather than a method but that
-// would make its use clumsier.
-var logExitFunc func(error)
-
-// exit is called if there is trouble creating or writing log files.
-// It flushes the logs and exits the program; there's no point in hanging around.
-// l.mu is held.
-func (l *loggingT) exit(err error) {
-	fmt.Fprintf(os.Stderr, "log: exiting because of error: %s\n", err)
-	// If logExitFunc is set, we do that instead of exiting.
-	if logExitFunc != nil {
-		logExitFunc(err)
-		return
-	}
-	l.flushAll()
-	os.Exit(2)
-}
-
-// syncBuffer joins a bufio.Writer to its underlying file, providing access to the
-// file's Sync method and providing a wrapper for the Write method that provides log
-// file rotation. There are conflicting methods, so the file cannot be embedded.
-// l.mu is held for all its methods.
-type syncBuffer struct {
-	logger *loggingT
-	*bufio.Writer
-	file   *os.File
-	sev    severity
-	nbytes uint64 // The number of bytes written to this file
-}
-
-func (sb *syncBuffer) Sync() error {
-	return sb.file.Sync()
-}
-
-func (sb *syncBuffer) Write(p []byte) (n int, err error) {
-	if sb.nbytes+uint64(len(p)) >= MaxSize {
-		if err := sb.rotateFile(time.Now()); err != nil {
-			sb.logger.exit(err)
-		}
-	}
-	n, err = sb.Writer.Write(p)
-	sb.nbytes += uint64(n)
-	if err != nil {
-		sb.logger.exit(err)
-	}
-	return
-}
-
-// rotateFile closes the syncBuffer's file and starts a new one.
-func (sb *syncBuffer) rotateFile(now time.Time) error {
-	if sb.file != nil {
-		sb.Flush()
-		sb.file.Close()
-	}
-	var err error
-	sb.file, _, err = create(severityName[sb.sev], now)
-	sb.nbytes = 0
-	if err != nil {
-		return err
-	}
-
-	sb.Writer = bufio.NewWriterSize(sb.file, bufferSize)
-
-	// Write header.
-	var buf bytes.Buffer
-	fmt.Fprintf(&buf, "Log file created at: %s\n", now.Format("2006/01/02 15:04:05"))
-	fmt.Fprintf(&buf, "Running on machine: %s\n", host)
-	fmt.Fprintf(&buf, "Binary: Built with %s %s for %s/%s\n", runtime.Compiler, runtime.Version(), runtime.GOOS, runtime.GOARCH)
-	fmt.Fprintf(&buf, "Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg\n")
-	n, err := sb.file.Write(buf.Bytes())
-	sb.nbytes += uint64(n)
-	return err
-}
-
-// bufferSize sizes the buffer associated with each log file. It's large
-// so that log records can accumulate without the logging thread blocking
-// on disk I/O. The flushDaemon will block instead.
-const bufferSize = 256 * 1024
-
-// createFiles creates all the log files for severity from sev down to infoLog.
-// l.mu is held.
-func (l *loggingT) createFiles(sev severity) error {
-	now := time.Now()
-	// Files are created in decreasing severity order, so as soon as we find one
-	// has already been created, we can stop.
-	for s := sev; s >= infoLog && l.file[s] == nil; s-- {
-		sb := &syncBuffer{
-			logger: l,
-			sev:    s,
-		}
-		if err := sb.rotateFile(now); err != nil {
-			return err
-		}
-		l.file[s] = sb
-	}
-	return nil
-}
-
-const flushInterval = 30 * time.Second
-
-// flushDaemon periodically flushes the log file buffers.
-func (l *loggingT) flushDaemon() {
-	for _ = range time.NewTicker(flushInterval).C {
-		l.lockAndFlushAll()
-	}
-}
-
-// lockAndFlushAll is like flushAll but locks l.mu first.
-func (l *loggingT) lockAndFlushAll() {
-	l.mu.Lock()
-	l.flushAll()
-	l.mu.Unlock()
-}
-
-// flushAll flushes all the logs and attempts to "sync" their data to disk.
-// l.mu is held.
-func (l *loggingT) flushAll() {
-	// Flush from fatal down, in case there's trouble flushing.
-	for s := fatalLog; s >= infoLog; s-- {
-		file := l.file[s]
-		if file != nil {
-			file.Flush() // ignore error
-			file.Sync()  // ignore error
-		}
-	}
-}
-
-// CopyStandardLogTo arranges for messages written to the Go "log" package's
-// default logs to also appear in the Google logs for the named and lower
-// severities.  Subsequent changes to the standard log's default output location
-// or format may break this behavior.
-//
-// Valid names are "INFO", "WARNING", "ERROR", and "FATAL".  If the name is not
-// recognized, CopyStandardLogTo panics.
-func CopyStandardLogTo(name string) {
-	sev, ok := severityByName(name)
-	if !ok {
-		panic(fmt.Sprintf("log.CopyStandardLogTo(%q): unrecognized severity name", name))
-	}
-	// Set a log format that captures the user's file and line:
-	//   d.go:23: message
-	stdLog.SetFlags(stdLog.Lshortfile)
-	stdLog.SetOutput(logBridge(sev))
-}
-
-// logBridge provides the Write method that enables CopyStandardLogTo to connect
-// Go's standard logs to the logs provided by this package.
-type logBridge severity
-
-// Write parses the standard logging line and passes its components to the
-// logger for severity(lb).
-func (lb logBridge) Write(b []byte) (n int, err error) {
-	var (
-		file = "???"
-		line = 1
-		text string
-	)
-	// Split "d.go:23: message" into "d.go", "23", and "message".
-	if parts := bytes.SplitN(b, []byte{':'}, 3); len(parts) != 3 || len(parts[0]) < 1 || len(parts[2]) < 1 {
-		text = fmt.Sprintf("bad log format: %s", b)
-	} else {
-		file = string(parts[0])
-		text = string(parts[2][1:]) // skip leading space
-		line, err = strconv.Atoi(string(parts[1]))
-		if err != nil {
-			text = fmt.Sprintf("bad line number: %s", b)
-			line = 1
-		}
-	}
-	// printWithFileLine with alsoToStderr=true, so standard log messages
-	// always appear on standard error.
-	logging.printWithFileLine(severity(lb), file, line, true, text)
-	return len(b), nil
-}
-
-// setV computes and remembers the V level for a given PC
-// when vmodule is enabled.
-// File pattern matching takes the basename of the file, stripped
-// of its .go suffix, and uses filepath.Match, which is a little more
-// general than the *? matching used in C++.
-// l.mu is held.
-func (l *loggingT) setV(pc uintptr) Level {
-	fn := runtime.FuncForPC(pc)
-	file, _ := fn.FileLine(pc)
-	// The file is something like /a/b/c/d.go. We want just the d.
-	if strings.HasSuffix(file, ".go") {
-		file = file[:len(file)-3]
-	}
-	if slash := strings.LastIndex(file, "/"); slash >= 0 {
-		file = file[slash+1:]
-	}
-	for _, filter := range l.vmodule.filter {
-		if filter.match(file) {
-			l.vmap[pc] = filter.level
-			return filter.level
-		}
-	}
-	l.vmap[pc] = 0
-	return 0
-}
-
-// Verbose is a boolean type that implements Infof (like Printf) etc.
-// See the documentation of V for more information.
-type Verbose bool
-
-// V reports whether verbosity at the call site is at least the requested level.
-// The returned value is a boolean of type Verbose, which implements Info, Infoln
-// and Infof. These methods will write to the Info log if called.
-// Thus, one may write either
-//	if glog.V(2) { glog.Info("log this") }
-// or
-//	glog.V(2).Info("log this")
-// The second form is shorter but the first is cheaper if logging is off because it does
-// not evaluate its arguments.
-//
-// Whether an individual call to V generates a log record depends on the setting of
-// the -v and --vmodule flags; both are off by default. If the level in the call to
-// V is at least the value of -v, or of -vmodule for the source file containing the
-// call, the V call will log.
-func V(level Level) Verbose {
-	// This function tries hard to be cheap unless there's work to do.
-	// The fast path is two atomic loads and compares.
-
-	// Here is a cheap but safe test to see if V logging is enabled globally.
-	if logging.verbosity.get() >= level {
-		return Verbose(true)
-	}
-
-	// It's off globally but it vmodule may still be set.
-	// Here is another cheap but safe test to see if vmodule is enabled.
-	if atomic.LoadInt32(&logging.filterLength) > 0 {
-		// Now we need a proper lock to use the logging structure. The pcs field
-		// is shared so we must lock before accessing it. This is fairly expensive,
-		// but if V logging is enabled we're slow anyway.
-		logging.mu.Lock()
-		defer logging.mu.Unlock()
-		if runtime.Callers(2, logging.pcs[:]) == 0 {
-			return Verbose(false)
-		}
-		v, ok := logging.vmap[logging.pcs[0]]
-		if !ok {
-			v = logging.setV(logging.pcs[0])
-		}
-		return Verbose(v >= level)
-	}
-	return Verbose(false)
-}
-
-// Info is equivalent to the global Info function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Info(args ...interface{}) {
-	if v {
-		logging.print(infoLog, args...)
-	}
-}
-
-// Infoln is equivalent to the global Infoln function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Infoln(args ...interface{}) {
-	if v {
-		logging.println(infoLog, args...)
-	}
-}
-
-// Infof is equivalent to the global Infof function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Infof(format string, args ...interface{}) {
-	if v {
-		logging.printf(infoLog, format, args...)
-	}
-}
-
-// Info logs to the INFO log.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Info(args ...interface{}) {
-	logging.print(infoLog, args...)
-}
-
-// InfoDepth acts as Info but uses depth to determine which call frame to log.
-// InfoDepth(0, "msg") is the same as Info("msg").
-func InfoDepth(depth int, args ...interface{}) {
-	logging.printDepth(infoLog, depth, args...)
-}
-
-// Infoln logs to the INFO log.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Infoln(args ...interface{}) {
-	logging.println(infoLog, args...)
-}
-
-// Infof logs to the INFO log.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Infof(format string, args ...interface{}) {
-	logging.printf(infoLog, format, args...)
-}
-
-// Warning logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Warning(args ...interface{}) {
-	logging.print(warningLog, args...)
-}
-
-// WarningDepth acts as Warning but uses depth to determine which call frame to log.
-// WarningDepth(0, "msg") is the same as Warning("msg").
-func WarningDepth(depth int, args ...interface{}) {
-	logging.printDepth(warningLog, depth, args...)
-}
-
-// Warningln logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Warningln(args ...interface{}) {
-	logging.println(warningLog, args...)
-}
-
-// Warningf logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Warningf(format string, args ...interface{}) {
-	logging.printf(warningLog, format, args...)
-}
-
-// Error logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Error(args ...interface{}) {
-	logging.print(errorLog, args...)
-}
-
-// ErrorDepth acts as Error but uses depth to determine which call frame to log.
-// ErrorDepth(0, "msg") is the same as Error("msg").
-func ErrorDepth(depth int, args ...interface{}) {
-	logging.printDepth(errorLog, depth, args...)
-}
-
-// Errorln logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Errorln(args ...interface{}) {
-	logging.println(errorLog, args...)
-}
-
-// Errorf logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Errorf(format string, args ...interface{}) {
-	logging.printf(errorLog, format, args...)
-}
-
-// Fatal logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Fatal(args ...interface{}) {
-	logging.print(fatalLog, args...)
-}
-
-// FatalDepth acts as Fatal but uses depth to determine which call frame to log.
-// FatalDepth(0, "msg") is the same as Fatal("msg").
-func FatalDepth(depth int, args ...interface{}) {
-	logging.printDepth(fatalLog, depth, args...)
-}
-
-// Fatalln logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Fatalln(args ...interface{}) {
-	logging.println(fatalLog, args...)
-}
-
-// Fatalf logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Fatalf(format string, args ...interface{}) {
-	logging.printf(fatalLog, format, args...)
-}
-
-// fatalNoStacks is non-zero if we are to exit without dumping goroutine stacks.
-// It allows Exit and relatives to use the Fatal logs.
-var fatalNoStacks uint32
-
-// Exit logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Exit(args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.print(fatalLog, args...)
-}
-
-// ExitDepth acts as Exit but uses depth to determine which call frame to log.
-// ExitDepth(0, "msg") is the same as Exit("msg").
-func ExitDepth(depth int, args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.printDepth(fatalLog, depth, args...)
-}
-
-// Exitln logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-func Exitln(args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.println(fatalLog, args...)
-}
-
-// Exitf logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Exitf(format string, args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.printf(fatalLog, format, args...)
-}
diff --git a/vendor/github.com/golang/glog/glog_file.go b/vendor/github.com/golang/glog/glog_file.go
deleted file mode 100644
index 65075d281..000000000
--- a/vendor/github.com/golang/glog/glog_file.go
+++ /dev/null
@@ -1,124 +0,0 @@
-// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
-//
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// File I/O for logs.
-
-package glog
-
-import (
-	"errors"
-	"flag"
-	"fmt"
-	"os"
-	"os/user"
-	"path/filepath"
-	"strings"
-	"sync"
-	"time"
-)
-
-// MaxSize is the maximum size of a log file in bytes.
-var MaxSize uint64 = 1024 * 1024 * 1800
-
-// logDirs lists the candidate directories for new log files.
-var logDirs []string
-
-// If non-empty, overrides the choice of directory in which to write logs.
-// See createLogDirs for the full list of possible destinations.
-var logDir = flag.String("log_dir", "", "If non-empty, write log files in this directory")
-
-func createLogDirs() {
-	if *logDir != "" {
-		logDirs = append(logDirs, *logDir)
-	}
-	logDirs = append(logDirs, os.TempDir())
-}
-
-var (
-	pid      = os.Getpid()
-	program  = filepath.Base(os.Args[0])
-	host     = "unknownhost"
-	userName = "unknownuser"
-)
-
-func init() {
-	h, err := os.Hostname()
-	if err == nil {
-		host = shortHostname(h)
-	}
-
-	current, err := user.Current()
-	if err == nil {
-		userName = current.Username
-	}
-
-	// Sanitize userName since it may contain filepath separators on Windows.
-	userName = strings.Replace(userName, `\`, "_", -1)
-}
-
-// shortHostname returns its argument, truncating at the first period.
-// For instance, given "www.google.com" it returns "www".
-func shortHostname(hostname string) string {
-	if i := strings.Index(hostname, "."); i >= 0 {
-		return hostname[:i]
-	}
-	return hostname
-}
-
-// logName returns a new log file name containing tag, with start time t, and
-// the name for the symlink for tag.
-func logName(tag string, t time.Time) (name, link string) {
-	name = fmt.Sprintf("%s.%s.%s.log.%s.%04d%02d%02d-%02d%02d%02d.%d",
-		program,
-		host,
-		userName,
-		tag,
-		t.Year(),
-		t.Month(),
-		t.Day(),
-		t.Hour(),
-		t.Minute(),
-		t.Second(),
-		pid)
-	return name, program + "." + tag
-}
-
-var onceLogDirs sync.Once
-
-// create creates a new log file and returns the file and its filename, which
-// contains tag ("INFO", "FATAL", etc.) and t.  If the file is created
-// successfully, create also attempts to update the symlink for that tag, ignoring
-// errors.
-func create(tag string, t time.Time) (f *os.File, filename string, err error) {
-	onceLogDirs.Do(createLogDirs)
-	if len(logDirs) == 0 {
-		return nil, "", errors.New("log: no log dirs")
-	}
-	name, link := logName(tag, t)
-	var lastErr error
-	for _, dir := range logDirs {
-		fname := filepath.Join(dir, name)
-		f, err := os.Create(fname)
-		if err == nil {
-			symlink := filepath.Join(dir, link)
-			os.Remove(symlink)        // ignore err
-			os.Symlink(name, symlink) // ignore err
-			return f, fname, nil
-		}
-		lastErr = err
-	}
-	return nil, "", fmt.Errorf("log: cannot create log: %v", lastErr)
-}
diff --git a/vendor/github.com/google/gofuzz/go.mod b/vendor/github.com/google/gofuzz/go.mod
new file mode 100644
index 000000000..8ec4fe9e9
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/go.mod
@@ -0,0 +1,3 @@
+module github.com/google/gofuzz
+
+go 1.12
diff --git a/vendor/github.com/imdario/mergo/README.md b/vendor/github.com/imdario/mergo/README.md
index 8b76f1fbf..02fc81e06 100644
--- a/vendor/github.com/imdario/mergo/README.md
+++ b/vendor/github.com/imdario/mergo/README.md
@@ -13,6 +13,7 @@ It is ready for production use. [It is used in several projects by Docker, Googl
 [![Build Status][1]][2]
 [![Coverage Status][7]][8]
 [![Sourcegraph][9]][10]
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fimdario%2Fmergo.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_shield)
 
 [1]: https://travis-ci.org/imdario/mergo.png
 [2]: https://travis-ci.org/imdario/mergo
@@ -27,7 +28,7 @@ It is ready for production use. [It is used in several projects by Docker, Googl
 
 ### Latest release
 
-[Release v0.3.6](https://github.com/imdario/mergo/releases/tag/v0.3.6).
+[Release v0.3.7](https://github.com/imdario/mergo/releases/tag/v0.3.7).
 
 ### Important note
 
@@ -217,6 +218,21 @@ If I can help you, you have an idea or you are using Mergo in your projects, don
 
 Written by [Dario Castañé](http://dario.im).
 
+## Top Contributors
+
+[![0](https://sourcerer.io/fame/imdario/imdario/mergo/images/0)](https://sourcerer.io/fame/imdario/imdario/mergo/links/0)
+[![1](https://sourcerer.io/fame/imdario/imdario/mergo/images/1)](https://sourcerer.io/fame/imdario/imdario/mergo/links/1)
+[![2](https://sourcerer.io/fame/imdario/imdario/mergo/images/2)](https://sourcerer.io/fame/imdario/imdario/mergo/links/2)
+[![3](https://sourcerer.io/fame/imdario/imdario/mergo/images/3)](https://sourcerer.io/fame/imdario/imdario/mergo/links/3)
+[![4](https://sourcerer.io/fame/imdario/imdario/mergo/images/4)](https://sourcerer.io/fame/imdario/imdario/mergo/links/4)
+[![5](https://sourcerer.io/fame/imdario/imdario/mergo/images/5)](https://sourcerer.io/fame/imdario/imdario/mergo/links/5)
+[![6](https://sourcerer.io/fame/imdario/imdario/mergo/images/6)](https://sourcerer.io/fame/imdario/imdario/mergo/links/6)
+[![7](https://sourcerer.io/fame/imdario/imdario/mergo/images/7)](https://sourcerer.io/fame/imdario/imdario/mergo/links/7)
+
+
 ## License
 
 [BSD 3-Clause](http://opensource.org/licenses/BSD-3-Clause) license, as [Go language](http://golang.org/LICENSE).
+
+
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fimdario%2Fmergo.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_large)
diff --git a/vendor/github.com/imdario/mergo/map.go b/vendor/github.com/imdario/mergo/map.go
index 6ea38e636..3f5afa83a 100644
--- a/vendor/github.com/imdario/mergo/map.go
+++ b/vendor/github.com/imdario/mergo/map.go
@@ -72,6 +72,7 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int, conf
 	case reflect.Struct:
 		srcMap := src.Interface().(map[string]interface{})
 		for key := range srcMap {
+			config.overwriteWithEmptyValue = true
 			srcValue := srcMap[key]
 			fieldName := changeInitialCase(key, unicode.ToUpper)
 			dstElement := dst.FieldByName(fieldName)
diff --git a/vendor/github.com/imdario/mergo/merge.go b/vendor/github.com/imdario/mergo/merge.go
index 44f70a89d..f8de6c543 100644
--- a/vendor/github.com/imdario/mergo/merge.go
+++ b/vendor/github.com/imdario/mergo/merge.go
@@ -26,9 +26,10 @@ func hasExportedField(dst reflect.Value) (exported bool) {
 }
 
 type Config struct {
-	Overwrite    bool
-	AppendSlice  bool
-	Transformers Transformers
+	Overwrite               bool
+	AppendSlice             bool
+	Transformers            Transformers
+	overwriteWithEmptyValue bool
 }
 
 type Transformers interface {
@@ -40,6 +41,8 @@ type Transformers interface {
 // short circuiting on recursive types.
 func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) {
 	overwrite := config.Overwrite
+	overwriteWithEmptySrc := config.overwriteWithEmptyValue
+	config.overwriteWithEmptyValue = false
 
 	if !src.IsValid() {
 		return
@@ -74,7 +77,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 				}
 			}
 		} else {
-			if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
+			if dst.CanSet() && (!isEmptyValue(src) || overwriteWithEmptySrc) && (overwrite || isEmptyValue(dst)) {
 				dst.Set(src)
 			}
 		}
@@ -125,7 +128,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 						dstSlice = reflect.ValueOf(dstElement.Interface())
 					}
 
-					if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
+					if (!isEmptyValue(src) || overwriteWithEmptySrc) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
 						dstSlice = srcSlice
 					} else if config.AppendSlice {
 						if srcSlice.Type() != dstSlice.Type() {
@@ -136,7 +139,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 					dst.SetMapIndex(key, dstSlice)
 				}
 			}
-			if dstElement.IsValid() && reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map {
+			if dstElement.IsValid() && !isEmptyValue(dstElement) && (reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map || reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Slice) {
 				continue
 			}
 
@@ -151,7 +154,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 		if !dst.CanSet() {
 			break
 		}
-		if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
+		if (!isEmptyValue(src) || overwriteWithEmptySrc) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
 			dst.Set(src)
 		} else if config.AppendSlice {
 			if src.Type() != dst.Type() {
@@ -191,7 +194,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 			return
 		}
 	default:
-		if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
+		if dst.CanSet() && (!isEmptyValue(src) || overwriteWithEmptySrc) && (overwrite || isEmptyValue(dst)) {
 			dst.Set(src)
 		}
 	}
diff --git a/vendor/github.com/json-iterator/go/README.md b/vendor/github.com/json-iterator/go/README.md
index 54d5afe95..50d56ffbf 100644
--- a/vendor/github.com/json-iterator/go/README.md
+++ b/vendor/github.com/json-iterator/go/README.md
@@ -10,10 +10,6 @@ A high-performance 100% compatible drop-in replacement of "encoding/json"
 
 You can also use thrift like JSON using [thrift-iterator](https://github.com/thrift-iterator/go)
 
-```
-Go开发者们请加入我们，滴滴出行平台技术部 taowen@didichuxing.com
-```
-
 # Benchmark
 
 ![benchmark](http://jsoniter.com/benchmarks/go-benchmark.png)
diff --git a/vendor/github.com/json-iterator/go/any.go b/vendor/github.com/json-iterator/go/any.go
index daecfed61..f6b8aeab0 100644
--- a/vendor/github.com/json-iterator/go/any.go
+++ b/vendor/github.com/json-iterator/go/any.go
@@ -312,6 +312,10 @@ func (codec *directAnyCodec) Decode(ptr unsafe.Pointer, iter *Iterator) {
 
 func (codec *directAnyCodec) Encode(ptr unsafe.Pointer, stream *Stream) {
 	any := *(*Any)(ptr)
+	if any == nil {
+		stream.WriteNil()
+		return
+	}
 	any.WriteTo(stream)
 }
 
diff --git a/vendor/github.com/json-iterator/go/iter_float.go b/vendor/github.com/json-iterator/go/iter_float.go
index 4f883c095..b9754638e 100644
--- a/vendor/github.com/json-iterator/go/iter_float.go
+++ b/vendor/github.com/json-iterator/go/iter_float.go
@@ -77,14 +77,12 @@ func (iter *Iterator) ReadFloat32() (ret float32) {
 }
 
 func (iter *Iterator) readPositiveFloat32() (ret float32) {
-	value := uint64(0)
-	c := byte(' ')
 	i := iter.head
 	// first char
 	if i == iter.tail {
 		return iter.readFloat32SlowPath()
 	}
-	c = iter.buf[i]
+	c := iter.buf[i]
 	i++
 	ind := floatDigits[c]
 	switch ind {
@@ -107,7 +105,7 @@ func (iter *Iterator) readPositiveFloat32() (ret float32) {
 			return
 		}
 	}
-	value = uint64(ind)
+	value := uint64(ind)
 	// chars before dot
 non_decimal_loop:
 	for ; i < iter.tail; i++ {
@@ -145,9 +143,7 @@ non_decimal_loop:
 				}
 				// too many decimal places
 				return iter.readFloat32SlowPath()
-			case invalidCharForNumber:
-				fallthrough
-			case dotInNumber:
+			case invalidCharForNumber, dotInNumber:
 				return iter.readFloat32SlowPath()
 			}
 			decimalPlaces++
@@ -218,14 +214,12 @@ func (iter *Iterator) ReadFloat64() (ret float64) {
 }
 
 func (iter *Iterator) readPositiveFloat64() (ret float64) {
-	value := uint64(0)
-	c := byte(' ')
 	i := iter.head
 	// first char
 	if i == iter.tail {
 		return iter.readFloat64SlowPath()
 	}
-	c = iter.buf[i]
+	c := iter.buf[i]
 	i++
 	ind := floatDigits[c]
 	switch ind {
@@ -248,7 +242,7 @@ func (iter *Iterator) readPositiveFloat64() (ret float64) {
 			return
 		}
 	}
-	value = uint64(ind)
+	value := uint64(ind)
 	// chars before dot
 non_decimal_loop:
 	for ; i < iter.tail; i++ {
@@ -286,9 +280,7 @@ non_decimal_loop:
 				}
 				// too many decimal places
 				return iter.readFloat64SlowPath()
-			case invalidCharForNumber:
-				fallthrough
-			case dotInNumber:
+			case invalidCharForNumber, dotInNumber:
 				return iter.readFloat64SlowPath()
 			}
 			decimalPlaces++
diff --git a/vendor/github.com/json-iterator/go/iter_skip_strict.go b/vendor/github.com/json-iterator/go/iter_skip_strict.go
index f67bc2e83..6cf66d043 100644
--- a/vendor/github.com/json-iterator/go/iter_skip_strict.go
+++ b/vendor/github.com/json-iterator/go/iter_skip_strict.go
@@ -2,12 +2,22 @@
 
 package jsoniter
 
-import "fmt"
+import (
+	"fmt"
+	"io"
+)
 
 func (iter *Iterator) skipNumber() {
 	if !iter.trySkipNumber() {
 		iter.unreadByte()
-		iter.ReadFloat32()
+		if iter.Error != nil && iter.Error != io.EOF {
+			return
+		}
+		iter.ReadFloat64()
+		if iter.Error != nil && iter.Error != io.EOF {
+			iter.Error = nil
+			iter.ReadBigFloat()
+		}
 	}
 }
 
diff --git a/vendor/github.com/json-iterator/go/reflect_extension.go b/vendor/github.com/json-iterator/go/reflect_extension.go
index 04f68756b..05e8fbf1f 100644
--- a/vendor/github.com/json-iterator/go/reflect_extension.go
+++ b/vendor/github.com/json-iterator/go/reflect_extension.go
@@ -338,7 +338,7 @@ func describeStruct(ctx *ctx, typ reflect2.Type) *StructDescriptor {
 	for i := 0; i < structType.NumField(); i++ {
 		field := structType.Field(i)
 		tag, hastag := field.Tag().Lookup(ctx.getTagKey())
-		if ctx.onlyTaggedField && !hastag {
+		if ctx.onlyTaggedField && !hastag && !field.Anonymous() {
 			continue
 		}
 		tagParts := strings.Split(tag, ",")
diff --git a/vendor/github.com/json-iterator/go/reflect_map.go b/vendor/github.com/json-iterator/go/reflect_map.go
index 7f66a88b0..547b4421e 100644
--- a/vendor/github.com/json-iterator/go/reflect_map.go
+++ b/vendor/github.com/json-iterator/go/reflect_map.go
@@ -64,14 +64,26 @@ func decoderOfMapKey(ctx *ctx, typ reflect2.Type) ValDecoder {
 		return &numericMapKeyDecoder{decoderOfType(ctx, typ)}
 	default:
 		ptrType := reflect2.PtrTo(typ)
-		if ptrType.Implements(textMarshalerType) {
+		if ptrType.Implements(unmarshalerType) {
+			return &referenceDecoder{
+				&unmarshalerDecoder{
+					valType: ptrType,
+				},
+			}
+		}
+		if typ.Implements(unmarshalerType) {
+			return &unmarshalerDecoder{
+				valType: typ,
+			}
+		}
+		if ptrType.Implements(textUnmarshalerType) {
 			return &referenceDecoder{
 				&textUnmarshalerDecoder{
 					valType: ptrType,
 				},
 			}
 		}
-		if typ.Implements(textMarshalerType) {
+		if typ.Implements(textUnmarshalerType) {
 			return &textUnmarshalerDecoder{
 				valType: typ,
 			}
diff --git a/vendor/github.com/json-iterator/go/reflect_marshaler.go b/vendor/github.com/json-iterator/go/reflect_marshaler.go
index 58ac959ad..fea50719d 100644
--- a/vendor/github.com/json-iterator/go/reflect_marshaler.go
+++ b/vendor/github.com/json-iterator/go/reflect_marshaler.go
@@ -93,8 +93,7 @@ func (encoder *marshalerEncoder) Encode(ptr unsafe.Pointer, stream *Stream) {
 		stream.WriteNil()
 		return
 	}
-	marshaler := obj.(json.Marshaler)
-	bytes, err := marshaler.MarshalJSON()
+	bytes, err := json.Marshal(obj)
 	if err != nil {
 		stream.Error = err
 	} else {
diff --git a/vendor/github.com/klauspost/compress/flate/copy.go b/vendor/github.com/klauspost/compress/flate/copy.go
deleted file mode 100644
index a3200a8f4..000000000
--- a/vendor/github.com/klauspost/compress/flate/copy.go
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package flate
-
-// forwardCopy is like the built-in copy function except that it always goes
-// forward from the start, even if the dst and src overlap.
-// It is equivalent to:
-//   for i := 0; i < n; i++ {
-//     mem[dst+i] = mem[src+i]
-//   }
-func forwardCopy(mem []byte, dst, src, n int) {
-	if dst <= src {
-		copy(mem[dst:dst+n], mem[src:src+n])
-		return
-	}
-	for {
-		if dst >= src+n {
-			copy(mem[dst:dst+n], mem[src:src+n])
-			return
-		}
-		// There is some forward overlap.  The destination
-		// will be filled with a repeated pattern of mem[src:src+k].
-		// We copy one instance of the pattern here, then repeat.
-		// Each time around this loop k will double.
-		k := dst - src
-		copy(mem[dst:dst+k], mem[src:src+k])
-		n -= k
-		dst += k
-	}
-}
diff --git a/vendor/github.com/klauspost/compress/flate/deflate.go b/vendor/github.com/klauspost/compress/flate/deflate.go
index 9e6e7ff0c..628795120 100644
--- a/vendor/github.com/klauspost/compress/flate/deflate.go
+++ b/vendor/github.com/klauspost/compress/flate/deflate.go
@@ -77,16 +77,14 @@ var levels = []compressionLevel{
 	{32, 258, 258, 4096, skipNever, 9},
 }
 
-type compressor struct {
-	compressionLevel
-
-	w          *huffmanBitWriter
-	bulkHasher func([]byte, []uint32)
-
-	// compression algorithm
-	fill func(*compressor, []byte) int // copy data to window
-	step func(*compressor)             // process window
-	sync bool                          // requesting flush
+// advancedState contains state for the advanced levels, with bigger hash tables, etc.
+type advancedState struct {
+	// deflate state
+	length         int
+	offset         int
+	hash           uint32
+	maxInsertIndex int
+	ii             uint16 // position of last match, intended to overflow to reset.
 
 	// Input hash chains
 	// hashHead[hashValue] contains the largest inputIndex with the specified hash value
@@ -99,57 +97,64 @@ type compressor struct {
 	hashOffset int
 
 	// input window: unprocessed data is window[index:windowEnd]
-	index         int
+	index      int
+	bulkHasher func([]byte, []uint32)
+	hashMatch  [maxMatchLength + minMatchLength]uint32
+}
+
+type compressor struct {
+	compressionLevel
+
+	w *huffmanBitWriter
+
+	// compression algorithm
+	fill func(*compressor, []byte) int // copy data to window
+	step func(*compressor)             // process window
+	sync bool                          // requesting flush
+
 	window        []byte
 	windowEnd     int
 	blockStart    int  // window index where current tokens start
 	byteAvailable bool // if true, still need to process window[index-1].
+	err           error
 
 	// queued output tokens
 	tokens tokens
-
-	// deflate state
-	length         int
-	offset         int
-	hash           uint32
-	maxInsertIndex int
-	err            error
-	ii             uint16 // position of last match, intended to overflow to reset.
-
-	snap      snappyEnc
-	hashMatch [maxMatchLength + minMatchLength]uint32
+	snap   fastEnc
+	state  *advancedState
 }
 
 func (d *compressor) fillDeflate(b []byte) int {
-	if d.index >= 2*windowSize-(minMatchLength+maxMatchLength) {
+	s := d.state
+	if s.index >= 2*windowSize-(minMatchLength+maxMatchLength) {
 		// shift the window by windowSize
 		copy(d.window[:], d.window[windowSize:2*windowSize])
-		d.index -= windowSize
+		s.index -= windowSize
 		d.windowEnd -= windowSize
 		if d.blockStart >= windowSize {
 			d.blockStart -= windowSize
 		} else {
 			d.blockStart = math.MaxInt32
 		}
-		d.hashOffset += windowSize
-		if d.hashOffset > maxHashOffset {
-			delta := d.hashOffset - 1
-			d.hashOffset -= delta
-			d.chainHead -= delta
+		s.hashOffset += windowSize
+		if s.hashOffset > maxHashOffset {
+			delta := s.hashOffset - 1
+			s.hashOffset -= delta
+			s.chainHead -= delta
 			// Iterate over slices instead of arrays to avoid copying
 			// the entire table onto the stack (Issue #18625).
-			for i, v := range d.hashPrev[:] {
+			for i, v := range s.hashPrev[:] {
 				if int(v) > delta {
-					d.hashPrev[i] = uint32(int(v) - delta)
+					s.hashPrev[i] = uint32(int(v) - delta)
 				} else {
-					d.hashPrev[i] = 0
+					s.hashPrev[i] = 0
 				}
 			}
-			for i, v := range d.hashHead[:] {
+			for i, v := range s.hashHead[:] {
 				if int(v) > delta {
-					d.hashHead[i] = uint32(int(v) - delta)
+					s.hashHead[i] = uint32(int(v) - delta)
 				} else {
-					d.hashHead[i] = 0
+					s.hashHead[i] = 0
 				}
 			}
 		}
@@ -207,6 +212,7 @@ func (d *compressor) fillWindow(b []byte) {
 	case 0, 1, 2:
 		return
 	}
+	s := d.state
 	// If we are given too much, cut it.
 	if len(b) > windowSize {
 		b = b[len(b)-windowSize:]
@@ -229,28 +235,28 @@ func (d *compressor) fillWindow(b []byte) {
 			continue
 		}
 
-		dst := d.hashMatch[:dstSize]
-		d.bulkHasher(tocheck, dst)
+		dst := s.hashMatch[:dstSize]
+		s.bulkHasher(tocheck, dst)
 		var newH uint32
 		for i, val := range dst {
 			di := i + startindex
 			newH = val & hashMask
 			// Get previous value with the same hash.
 			// Our chain should point to the previous value.
-			d.hashPrev[di&windowMask] = d.hashHead[newH]
+			s.hashPrev[di&windowMask] = s.hashHead[newH]
 			// Set the head of the hash chain to us.
-			d.hashHead[newH] = uint32(di + d.hashOffset)
+			s.hashHead[newH] = uint32(di + s.hashOffset)
 		}
-		d.hash = newH
+		s.hash = newH
 	}
 	// Update window information.
 	d.windowEnd += n
-	d.index = n
+	s.index = n
 }
 
 // Try to find a match starting at index whose length is greater than prevSize.
 // We only look at chainCount possibilities before giving up.
-// pos = d.index, prevHead = d.chainHead-d.hashOffset, prevLength=minMatchLength-1, lookahead
+// pos = s.index, prevHead = s.chainHead-s.hashOffset, prevLength=minMatchLength-1, lookahead
 func (d *compressor) findMatch(pos int, prevHead int, prevLength int, lookahead int) (length, offset int, ok bool) {
 	minMatchLook := maxMatchLength
 	if lookahead < minMatchLook {
@@ -295,7 +301,7 @@ func (d *compressor) findMatch(pos int, prevHead int, prevLength int, lookahead
 			// hashPrev[i & windowMask] has already been overwritten, so stop now.
 			break
 		}
-		i = int(d.hashPrev[i&windowMask]) - d.hashOffset
+		i = int(d.state.hashPrev[i&windowMask]) - d.state.hashOffset
 		if i < minIndex || i < 0 {
 			break
 		}
@@ -305,7 +311,7 @@ func (d *compressor) findMatch(pos int, prevHead int, prevLength int, lookahead
 
 // Try to find a match starting at index whose length is greater than prevSize.
 // We only look at chainCount possibilities before giving up.
-// pos = d.index, prevHead = d.chainHead-d.hashOffset, prevLength=minMatchLength-1, lookahead
+// pos = s.index, prevHead = s.chainHead-s.hashOffset, prevLength=minMatchLength-1, lookahead
 func (d *compressor) findMatchSSE(pos int, prevHead int, prevLength int, lookahead int) (length, offset int, ok bool) {
 	minMatchLook := maxMatchLength
 	if lookahead < minMatchLook {
@@ -350,7 +356,7 @@ func (d *compressor) findMatchSSE(pos int, prevHead int, prevLength int, lookahe
 			// hashPrev[i & windowMask] has already been overwritten, so stop now.
 			break
 		}
-		i = int(d.hashPrev[i&windowMask]) - d.hashOffset
+		i = int(d.state.hashPrev[i&windowMask]) - d.state.hashOffset
 		if i < minIndex || i < 0 {
 			break
 		}
@@ -406,52 +412,57 @@ func matchLen(a, b []byte, max int) int {
 
 func (d *compressor) initDeflate() {
 	d.window = make([]byte, 2*windowSize)
-	d.hashOffset = 1
-	d.length = minMatchLength - 1
-	d.offset = 0
 	d.byteAvailable = false
-	d.index = 0
-	d.hash = 0
-	d.chainHead = -1
-	d.bulkHasher = bulkHash4
+	d.err = nil
+	if d.state == nil {
+		return
+	}
+	s := d.state
+	s.index = 0
+	s.hashOffset = 1
+	s.length = minMatchLength - 1
+	s.offset = 0
+	s.hash = 0
+	s.chainHead = -1
+	s.bulkHasher = bulkHash4
 	if useSSE42 {
-		d.bulkHasher = crc32sseAll
+		s.bulkHasher = crc32sseAll
 	}
 }
 
 // Assumes that d.fastSkipHashing != skipNever,
 // otherwise use deflateLazy
 func (d *compressor) deflate() {
-
+	s := d.state
 	// Sanity enables additional runtime tests.
 	// It's intended to be used during development
 	// to supplement the currently ad-hoc unit tests.
 	const sanity = false
 
-	if d.windowEnd-d.index < minMatchLength+maxMatchLength && !d.sync {
+	if d.windowEnd-s.index < minMatchLength+maxMatchLength && !d.sync {
 		return
 	}
 
-	d.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
-	if d.index < d.maxInsertIndex {
-		d.hash = hash4(d.window[d.index : d.index+minMatchLength])
+	s.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
+	if s.index < s.maxInsertIndex {
+		s.hash = hash4(d.window[s.index : s.index+minMatchLength])
 	}
 
 	for {
-		if sanity && d.index > d.windowEnd {
+		if sanity && s.index > d.windowEnd {
 			panic("index > windowEnd")
 		}
-		lookahead := d.windowEnd - d.index
+		lookahead := d.windowEnd - s.index
 		if lookahead < minMatchLength+maxMatchLength {
 			if !d.sync {
 				return
 			}
-			if sanity && d.index > d.windowEnd {
+			if sanity && s.index > d.windowEnd {
 				panic("index > windowEnd")
 			}
 			if lookahead == 0 {
 				if d.tokens.n > 0 {
-					if d.err = d.writeBlockSkip(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlockSkip(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
@@ -459,55 +470,55 @@ func (d *compressor) deflate() {
 				return
 			}
 		}
-		if d.index < d.maxInsertIndex {
+		if s.index < s.maxInsertIndex {
 			// Update the hash
-			d.hash = hash4(d.window[d.index : d.index+minMatchLength])
-			ch := d.hashHead[d.hash&hashMask]
-			d.chainHead = int(ch)
-			d.hashPrev[d.index&windowMask] = ch
-			d.hashHead[d.hash&hashMask] = uint32(d.index + d.hashOffset)
+			s.hash = hash4(d.window[s.index : s.index+minMatchLength])
+			ch := s.hashHead[s.hash&hashMask]
+			s.chainHead = int(ch)
+			s.hashPrev[s.index&windowMask] = ch
+			s.hashHead[s.hash&hashMask] = uint32(s.index + s.hashOffset)
 		}
-		d.length = minMatchLength - 1
-		d.offset = 0
-		minIndex := d.index - windowSize
+		s.length = minMatchLength - 1
+		s.offset = 0
+		minIndex := s.index - windowSize
 		if minIndex < 0 {
 			minIndex = 0
 		}
 
-		if d.chainHead-d.hashOffset >= minIndex && lookahead > minMatchLength-1 {
-			if newLength, newOffset, ok := d.findMatch(d.index, d.chainHead-d.hashOffset, minMatchLength-1, lookahead); ok {
-				d.length = newLength
-				d.offset = newOffset
+		if s.chainHead-s.hashOffset >= minIndex && lookahead > minMatchLength-1 {
+			if newLength, newOffset, ok := d.findMatch(s.index, s.chainHead-s.hashOffset, minMatchLength-1, lookahead); ok {
+				s.length = newLength
+				s.offset = newOffset
 			}
 		}
-		if d.length >= minMatchLength {
-			d.ii = 0
+		if s.length >= minMatchLength {
+			s.ii = 0
 			// There was a match at the previous step, and the current match is
 			// not better. Output the previous match.
-			// "d.length-3" should NOT be "d.length-minMatchLength", since the format always assume 3
-			d.tokens.tokens[d.tokens.n] = matchToken(uint32(d.length-3), uint32(d.offset-minOffsetSize))
+			// "s.length-3" should NOT be "s.length-minMatchLength", since the format always assume 3
+			d.tokens.tokens[d.tokens.n] = matchToken(uint32(s.length-3), uint32(s.offset-minOffsetSize))
 			d.tokens.n++
 			// Insert in the hash table all strings up to the end of the match.
 			// index and index-1 are already inserted. If there is not enough
 			// lookahead, the last two strings are not inserted into the hash
 			// table.
-			if d.length <= d.fastSkipHashing {
+			if s.length <= d.fastSkipHashing {
 				var newIndex int
-				newIndex = d.index + d.length
+				newIndex = s.index + s.length
 				// Calculate missing hashes
 				end := newIndex
-				if end > d.maxInsertIndex {
-					end = d.maxInsertIndex
+				if end > s.maxInsertIndex {
+					end = s.maxInsertIndex
 				}
 				end += minMatchLength - 1
-				startindex := d.index + 1
-				if startindex > d.maxInsertIndex {
-					startindex = d.maxInsertIndex
+				startindex := s.index + 1
+				if startindex > s.maxInsertIndex {
+					startindex = s.maxInsertIndex
 				}
 				tocheck := d.window[startindex:end]
 				dstSize := len(tocheck) - minMatchLength + 1
 				if dstSize > 0 {
-					dst := d.hashMatch[:dstSize]
+					dst := s.hashMatch[:dstSize]
 					bulkHash4(tocheck, dst)
 					var newH uint32
 					for i, val := range dst {
@@ -515,35 +526,35 @@ func (d *compressor) deflate() {
 						newH = val & hashMask
 						// Get previous value with the same hash.
 						// Our chain should point to the previous value.
-						d.hashPrev[di&windowMask] = d.hashHead[newH]
+						s.hashPrev[di&windowMask] = s.hashHead[newH]
 						// Set the head of the hash chain to us.
-						d.hashHead[newH] = uint32(di + d.hashOffset)
+						s.hashHead[newH] = uint32(di + s.hashOffset)
 					}
-					d.hash = newH
+					s.hash = newH
 				}
-				d.index = newIndex
+				s.index = newIndex
 			} else {
 				// For matches this long, we don't bother inserting each individual
 				// item into the table.
-				d.index += d.length
-				if d.index < d.maxInsertIndex {
-					d.hash = hash4(d.window[d.index : d.index+minMatchLength])
+				s.index += s.length
+				if s.index < s.maxInsertIndex {
+					s.hash = hash4(d.window[s.index : s.index+minMatchLength])
 				}
 			}
 			if d.tokens.n == maxFlateBlockTokens {
 				// The block includes the current character
-				if d.err = d.writeBlockSkip(d.tokens, d.index, false); d.err != nil {
+				if d.err = d.writeBlockSkip(d.tokens, s.index, false); d.err != nil {
 					return
 				}
 				d.tokens.n = 0
 			}
 		} else {
-			d.ii++
-			end := d.index + int(d.ii>>uint(d.fastSkipHashing)) + 1
+			s.ii++
+			end := s.index + int(s.ii>>uint(d.fastSkipHashing)) + 1
 			if end > d.windowEnd {
 				end = d.windowEnd
 			}
-			for i := d.index; i < end; i++ {
+			for i := s.index; i < end; i++ {
 				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[i]))
 				d.tokens.n++
 				if d.tokens.n == maxFlateBlockTokens {
@@ -553,7 +564,7 @@ func (d *compressor) deflate() {
 					d.tokens.n = 0
 				}
 			}
-			d.index = end
+			s.index = end
 		}
 	}
 }
@@ -561,42 +572,43 @@ func (d *compressor) deflate() {
 // deflateLazy is the same as deflate, but with d.fastSkipHashing == skipNever,
 // meaning it always has lazy matching on.
 func (d *compressor) deflateLazy() {
+	s := d.state
 	// Sanity enables additional runtime tests.
 	// It's intended to be used during development
 	// to supplement the currently ad-hoc unit tests.
 	const sanity = false
 
-	if d.windowEnd-d.index < minMatchLength+maxMatchLength && !d.sync {
+	if d.windowEnd-s.index < minMatchLength+maxMatchLength && !d.sync {
 		return
 	}
 
-	d.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
-	if d.index < d.maxInsertIndex {
-		d.hash = hash4(d.window[d.index : d.index+minMatchLength])
+	s.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
+	if s.index < s.maxInsertIndex {
+		s.hash = hash4(d.window[s.index : s.index+minMatchLength])
 	}
 
 	for {
-		if sanity && d.index > d.windowEnd {
+		if sanity && s.index > d.windowEnd {
 			panic("index > windowEnd")
 		}
-		lookahead := d.windowEnd - d.index
+		lookahead := d.windowEnd - s.index
 		if lookahead < minMatchLength+maxMatchLength {
 			if !d.sync {
 				return
 			}
-			if sanity && d.index > d.windowEnd {
+			if sanity && s.index > d.windowEnd {
 				panic("index > windowEnd")
 			}
 			if lookahead == 0 {
 				// Flush current output block if any.
 				if d.byteAvailable {
 					// There is still one pending token that needs to be flushed
-					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 					d.tokens.n++
 					d.byteAvailable = false
 				}
 				if d.tokens.n > 0 {
-					if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
@@ -604,30 +616,30 @@ func (d *compressor) deflateLazy() {
 				return
 			}
 		}
-		if d.index < d.maxInsertIndex {
+		if s.index < s.maxInsertIndex {
 			// Update the hash
-			d.hash = hash4(d.window[d.index : d.index+minMatchLength])
-			ch := d.hashHead[d.hash&hashMask]
-			d.chainHead = int(ch)
-			d.hashPrev[d.index&windowMask] = ch
-			d.hashHead[d.hash&hashMask] = uint32(d.index + d.hashOffset)
+			s.hash = hash4(d.window[s.index : s.index+minMatchLength])
+			ch := s.hashHead[s.hash&hashMask]
+			s.chainHead = int(ch)
+			s.hashPrev[s.index&windowMask] = ch
+			s.hashHead[s.hash&hashMask] = uint32(s.index + s.hashOffset)
 		}
-		prevLength := d.length
-		prevOffset := d.offset
-		d.length = minMatchLength - 1
-		d.offset = 0
-		minIndex := d.index - windowSize
+		prevLength := s.length
+		prevOffset := s.offset
+		s.length = minMatchLength - 1
+		s.offset = 0
+		minIndex := s.index - windowSize
 		if minIndex < 0 {
 			minIndex = 0
 		}
 
-		if d.chainHead-d.hashOffset >= minIndex && lookahead > prevLength && prevLength < d.lazy {
-			if newLength, newOffset, ok := d.findMatch(d.index, d.chainHead-d.hashOffset, minMatchLength-1, lookahead); ok {
-				d.length = newLength
-				d.offset = newOffset
+		if s.chainHead-s.hashOffset >= minIndex && lookahead > prevLength && prevLength < d.lazy {
+			if newLength, newOffset, ok := d.findMatch(s.index, s.chainHead-s.hashOffset, minMatchLength-1, lookahead); ok {
+				s.length = newLength
+				s.offset = newOffset
 			}
 		}
-		if prevLength >= minMatchLength && d.length <= prevLength {
+		if prevLength >= minMatchLength && s.length <= prevLength {
 			// There was a match at the previous step, and the current match is
 			// not better. Output the previous match.
 			d.tokens.tokens[d.tokens.n] = matchToken(uint32(prevLength-3), uint32(prevOffset-minOffsetSize))
@@ -638,21 +650,21 @@ func (d *compressor) deflateLazy() {
 			// lookahead, the last two strings are not inserted into the hash
 			// table.
 			var newIndex int
-			newIndex = d.index + prevLength - 1
+			newIndex = s.index + prevLength - 1
 			// Calculate missing hashes
 			end := newIndex
-			if end > d.maxInsertIndex {
-				end = d.maxInsertIndex
+			if end > s.maxInsertIndex {
+				end = s.maxInsertIndex
 			}
 			end += minMatchLength - 1
-			startindex := d.index + 1
-			if startindex > d.maxInsertIndex {
-				startindex = d.maxInsertIndex
+			startindex := s.index + 1
+			if startindex > s.maxInsertIndex {
+				startindex = s.maxInsertIndex
 			}
 			tocheck := d.window[startindex:end]
 			dstSize := len(tocheck) - minMatchLength + 1
 			if dstSize > 0 {
-				dst := d.hashMatch[:dstSize]
+				dst := s.hashMatch[:dstSize]
 				bulkHash4(tocheck, dst)
 				var newH uint32
 				for i, val := range dst {
@@ -660,74 +672,74 @@ func (d *compressor) deflateLazy() {
 					newH = val & hashMask
 					// Get previous value with the same hash.
 					// Our chain should point to the previous value.
-					d.hashPrev[di&windowMask] = d.hashHead[newH]
+					s.hashPrev[di&windowMask] = s.hashHead[newH]
 					// Set the head of the hash chain to us.
-					d.hashHead[newH] = uint32(di + d.hashOffset)
+					s.hashHead[newH] = uint32(di + s.hashOffset)
 				}
-				d.hash = newH
+				s.hash = newH
 			}
 
-			d.index = newIndex
+			s.index = newIndex
 			d.byteAvailable = false
-			d.length = minMatchLength - 1
+			s.length = minMatchLength - 1
 			if d.tokens.n == maxFlateBlockTokens {
 				// The block includes the current character
-				if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+				if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 					return
 				}
 				d.tokens.n = 0
 			}
 		} else {
 			// Reset, if we got a match this run.
-			if d.length >= minMatchLength {
-				d.ii = 0
+			if s.length >= minMatchLength {
+				s.ii = 0
 			}
 			// We have a byte waiting. Emit it.
 			if d.byteAvailable {
-				d.ii++
-				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+				s.ii++
+				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 				d.tokens.n++
 				if d.tokens.n == maxFlateBlockTokens {
-					if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
 				}
-				d.index++
+				s.index++
 
 				// If we have a long run of no matches, skip additional bytes
-				// Resets when d.ii overflows after 64KB.
-				if d.ii > 31 {
-					n := int(d.ii >> 5)
+				// Resets when s.ii overflows after 64KB.
+				if s.ii > 31 {
+					n := int(s.ii >> 5)
 					for j := 0; j < n; j++ {
-						if d.index >= d.windowEnd-1 {
+						if s.index >= d.windowEnd-1 {
 							break
 						}
 
-						d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+						d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 						d.tokens.n++
 						if d.tokens.n == maxFlateBlockTokens {
-							if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+							if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 								return
 							}
 							d.tokens.n = 0
 						}
-						d.index++
+						s.index++
 					}
 					// Flush last byte
-					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 					d.tokens.n++
 					d.byteAvailable = false
-					// d.length = minMatchLength - 1 // not needed, since d.ii is reset above, so it should never be > minMatchLength
+					// s.length = minMatchLength - 1 // not needed, since s.ii is reset above, so it should never be > minMatchLength
 					if d.tokens.n == maxFlateBlockTokens {
-						if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+						if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 							return
 						}
 						d.tokens.n = 0
 					}
 				}
 			} else {
-				d.index++
+				s.index++
 				d.byteAvailable = true
 			}
 		}
@@ -737,36 +749,36 @@ func (d *compressor) deflateLazy() {
 // Assumes that d.fastSkipHashing != skipNever,
 // otherwise use deflateLazySSE
 func (d *compressor) deflateSSE() {
-
+	s := d.state
 	// Sanity enables additional runtime tests.
 	// It's intended to be used during development
 	// to supplement the currently ad-hoc unit tests.
 	const sanity = false
 
-	if d.windowEnd-d.index < minMatchLength+maxMatchLength && !d.sync {
+	if d.windowEnd-s.index < minMatchLength+maxMatchLength && !d.sync {
 		return
 	}
 
-	d.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
-	if d.index < d.maxInsertIndex {
-		d.hash = crc32sse(d.window[d.index:d.index+minMatchLength]) & hashMask
+	s.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
+	if s.index < s.maxInsertIndex {
+		s.hash = crc32sse(d.window[s.index:s.index+minMatchLength]) & hashMask
 	}
 
 	for {
-		if sanity && d.index > d.windowEnd {
+		if sanity && s.index > d.windowEnd {
 			panic("index > windowEnd")
 		}
-		lookahead := d.windowEnd - d.index
+		lookahead := d.windowEnd - s.index
 		if lookahead < minMatchLength+maxMatchLength {
 			if !d.sync {
 				return
 			}
-			if sanity && d.index > d.windowEnd {
+			if sanity && s.index > d.windowEnd {
 				panic("index > windowEnd")
 			}
 			if lookahead == 0 {
 				if d.tokens.n > 0 {
-					if d.err = d.writeBlockSkip(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlockSkip(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
@@ -774,55 +786,55 @@ func (d *compressor) deflateSSE() {
 				return
 			}
 		}
-		if d.index < d.maxInsertIndex {
+		if s.index < s.maxInsertIndex {
 			// Update the hash
-			d.hash = crc32sse(d.window[d.index:d.index+minMatchLength]) & hashMask
-			ch := d.hashHead[d.hash]
-			d.chainHead = int(ch)
-			d.hashPrev[d.index&windowMask] = ch
-			d.hashHead[d.hash] = uint32(d.index + d.hashOffset)
+			s.hash = crc32sse(d.window[s.index:s.index+minMatchLength]) & hashMask
+			ch := s.hashHead[s.hash]
+			s.chainHead = int(ch)
+			s.hashPrev[s.index&windowMask] = ch
+			s.hashHead[s.hash] = uint32(s.index + s.hashOffset)
 		}
-		d.length = minMatchLength - 1
-		d.offset = 0
-		minIndex := d.index - windowSize
+		s.length = minMatchLength - 1
+		s.offset = 0
+		minIndex := s.index - windowSize
 		if minIndex < 0 {
 			minIndex = 0
 		}
 
-		if d.chainHead-d.hashOffset >= minIndex && lookahead > minMatchLength-1 {
-			if newLength, newOffset, ok := d.findMatchSSE(d.index, d.chainHead-d.hashOffset, minMatchLength-1, lookahead); ok {
-				d.length = newLength
-				d.offset = newOffset
+		if s.chainHead-s.hashOffset >= minIndex && lookahead > minMatchLength-1 {
+			if newLength, newOffset, ok := d.findMatchSSE(s.index, s.chainHead-s.hashOffset, minMatchLength-1, lookahead); ok {
+				s.length = newLength
+				s.offset = newOffset
 			}
 		}
-		if d.length >= minMatchLength {
-			d.ii = 0
+		if s.length >= minMatchLength {
+			s.ii = 0
 			// There was a match at the previous step, and the current match is
 			// not better. Output the previous match.
-			// "d.length-3" should NOT be "d.length-minMatchLength", since the format always assume 3
-			d.tokens.tokens[d.tokens.n] = matchToken(uint32(d.length-3), uint32(d.offset-minOffsetSize))
+			// "s.length-3" should NOT be "s.length-minMatchLength", since the format always assume 3
+			d.tokens.tokens[d.tokens.n] = matchToken(uint32(s.length-3), uint32(s.offset-minOffsetSize))
 			d.tokens.n++
 			// Insert in the hash table all strings up to the end of the match.
 			// index and index-1 are already inserted. If there is not enough
 			// lookahead, the last two strings are not inserted into the hash
 			// table.
-			if d.length <= d.fastSkipHashing {
+			if s.length <= d.fastSkipHashing {
 				var newIndex int
-				newIndex = d.index + d.length
+				newIndex = s.index + s.length
 				// Calculate missing hashes
 				end := newIndex
-				if end > d.maxInsertIndex {
-					end = d.maxInsertIndex
+				if end > s.maxInsertIndex {
+					end = s.maxInsertIndex
 				}
 				end += minMatchLength - 1
-				startindex := d.index + 1
-				if startindex > d.maxInsertIndex {
-					startindex = d.maxInsertIndex
+				startindex := s.index + 1
+				if startindex > s.maxInsertIndex {
+					startindex = s.maxInsertIndex
 				}
 				tocheck := d.window[startindex:end]
 				dstSize := len(tocheck) - minMatchLength + 1
 				if dstSize > 0 {
-					dst := d.hashMatch[:dstSize]
+					dst := s.hashMatch[:dstSize]
 
 					crc32sseAll(tocheck, dst)
 					var newH uint32
@@ -831,35 +843,35 @@ func (d *compressor) deflateSSE() {
 						newH = val & hashMask
 						// Get previous value with the same hash.
 						// Our chain should point to the previous value.
-						d.hashPrev[di&windowMask] = d.hashHead[newH]
+						s.hashPrev[di&windowMask] = s.hashHead[newH]
 						// Set the head of the hash chain to us.
-						d.hashHead[newH] = uint32(di + d.hashOffset)
+						s.hashHead[newH] = uint32(di + s.hashOffset)
 					}
-					d.hash = newH
+					s.hash = newH
 				}
-				d.index = newIndex
+				s.index = newIndex
 			} else {
 				// For matches this long, we don't bother inserting each individual
 				// item into the table.
-				d.index += d.length
-				if d.index < d.maxInsertIndex {
-					d.hash = crc32sse(d.window[d.index:d.index+minMatchLength]) & hashMask
+				s.index += s.length
+				if s.index < s.maxInsertIndex {
+					s.hash = crc32sse(d.window[s.index:s.index+minMatchLength]) & hashMask
 				}
 			}
 			if d.tokens.n == maxFlateBlockTokens {
 				// The block includes the current character
-				if d.err = d.writeBlockSkip(d.tokens, d.index, false); d.err != nil {
+				if d.err = d.writeBlockSkip(d.tokens, s.index, false); d.err != nil {
 					return
 				}
 				d.tokens.n = 0
 			}
 		} else {
-			d.ii++
-			end := d.index + int(d.ii>>5) + 1
+			s.ii++
+			end := s.index + int(s.ii>>5) + 1
 			if end > d.windowEnd {
 				end = d.windowEnd
 			}
-			for i := d.index; i < end; i++ {
+			for i := s.index; i < end; i++ {
 				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[i]))
 				d.tokens.n++
 				if d.tokens.n == maxFlateBlockTokens {
@@ -869,7 +881,7 @@ func (d *compressor) deflateSSE() {
 					d.tokens.n = 0
 				}
 			}
-			d.index = end
+			s.index = end
 		}
 	}
 }
@@ -877,42 +889,43 @@ func (d *compressor) deflateSSE() {
 // deflateLazy is the same as deflate, but with d.fastSkipHashing == skipNever,
 // meaning it always has lazy matching on.
 func (d *compressor) deflateLazySSE() {
+	s := d.state
 	// Sanity enables additional runtime tests.
 	// It's intended to be used during development
 	// to supplement the currently ad-hoc unit tests.
 	const sanity = false
 
-	if d.windowEnd-d.index < minMatchLength+maxMatchLength && !d.sync {
+	if d.windowEnd-s.index < minMatchLength+maxMatchLength && !d.sync {
 		return
 	}
 
-	d.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
-	if d.index < d.maxInsertIndex {
-		d.hash = crc32sse(d.window[d.index:d.index+minMatchLength]) & hashMask
+	s.maxInsertIndex = d.windowEnd - (minMatchLength - 1)
+	if s.index < s.maxInsertIndex {
+		s.hash = crc32sse(d.window[s.index:s.index+minMatchLength]) & hashMask
 	}
 
 	for {
-		if sanity && d.index > d.windowEnd {
+		if sanity && s.index > d.windowEnd {
 			panic("index > windowEnd")
 		}
-		lookahead := d.windowEnd - d.index
+		lookahead := d.windowEnd - s.index
 		if lookahead < minMatchLength+maxMatchLength {
 			if !d.sync {
 				return
 			}
-			if sanity && d.index > d.windowEnd {
+			if sanity && s.index > d.windowEnd {
 				panic("index > windowEnd")
 			}
 			if lookahead == 0 {
 				// Flush current output block if any.
 				if d.byteAvailable {
 					// There is still one pending token that needs to be flushed
-					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 					d.tokens.n++
 					d.byteAvailable = false
 				}
 				if d.tokens.n > 0 {
-					if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
@@ -920,30 +933,30 @@ func (d *compressor) deflateLazySSE() {
 				return
 			}
 		}
-		if d.index < d.maxInsertIndex {
+		if s.index < s.maxInsertIndex {
 			// Update the hash
-			d.hash = crc32sse(d.window[d.index:d.index+minMatchLength]) & hashMask
-			ch := d.hashHead[d.hash]
-			d.chainHead = int(ch)
-			d.hashPrev[d.index&windowMask] = ch
-			d.hashHead[d.hash] = uint32(d.index + d.hashOffset)
+			s.hash = crc32sse(d.window[s.index:s.index+minMatchLength]) & hashMask
+			ch := s.hashHead[s.hash]
+			s.chainHead = int(ch)
+			s.hashPrev[s.index&windowMask] = ch
+			s.hashHead[s.hash] = uint32(s.index + s.hashOffset)
 		}
-		prevLength := d.length
-		prevOffset := d.offset
-		d.length = minMatchLength - 1
-		d.offset = 0
-		minIndex := d.index - windowSize
+		prevLength := s.length
+		prevOffset := s.offset
+		s.length = minMatchLength - 1
+		s.offset = 0
+		minIndex := s.index - windowSize
 		if minIndex < 0 {
 			minIndex = 0
 		}
 
-		if d.chainHead-d.hashOffset >= minIndex && lookahead > prevLength && prevLength < d.lazy {
-			if newLength, newOffset, ok := d.findMatchSSE(d.index, d.chainHead-d.hashOffset, minMatchLength-1, lookahead); ok {
-				d.length = newLength
-				d.offset = newOffset
+		if s.chainHead-s.hashOffset >= minIndex && lookahead > prevLength && prevLength < d.lazy {
+			if newLength, newOffset, ok := d.findMatchSSE(s.index, s.chainHead-s.hashOffset, minMatchLength-1, lookahead); ok {
+				s.length = newLength
+				s.offset = newOffset
 			}
 		}
-		if prevLength >= minMatchLength && d.length <= prevLength {
+		if prevLength >= minMatchLength && s.length <= prevLength {
 			// There was a match at the previous step, and the current match is
 			// not better. Output the previous match.
 			d.tokens.tokens[d.tokens.n] = matchToken(uint32(prevLength-3), uint32(prevOffset-minOffsetSize))
@@ -954,21 +967,21 @@ func (d *compressor) deflateLazySSE() {
 			// lookahead, the last two strings are not inserted into the hash
 			// table.
 			var newIndex int
-			newIndex = d.index + prevLength - 1
+			newIndex = s.index + prevLength - 1
 			// Calculate missing hashes
 			end := newIndex
-			if end > d.maxInsertIndex {
-				end = d.maxInsertIndex
+			if end > s.maxInsertIndex {
+				end = s.maxInsertIndex
 			}
 			end += minMatchLength - 1
-			startindex := d.index + 1
-			if startindex > d.maxInsertIndex {
-				startindex = d.maxInsertIndex
+			startindex := s.index + 1
+			if startindex > s.maxInsertIndex {
+				startindex = s.maxInsertIndex
 			}
 			tocheck := d.window[startindex:end]
 			dstSize := len(tocheck) - minMatchLength + 1
 			if dstSize > 0 {
-				dst := d.hashMatch[:dstSize]
+				dst := s.hashMatch[:dstSize]
 				crc32sseAll(tocheck, dst)
 				var newH uint32
 				for i, val := range dst {
@@ -976,74 +989,74 @@ func (d *compressor) deflateLazySSE() {
 					newH = val & hashMask
 					// Get previous value with the same hash.
 					// Our chain should point to the previous value.
-					d.hashPrev[di&windowMask] = d.hashHead[newH]
+					s.hashPrev[di&windowMask] = s.hashHead[newH]
 					// Set the head of the hash chain to us.
-					d.hashHead[newH] = uint32(di + d.hashOffset)
+					s.hashHead[newH] = uint32(di + s.hashOffset)
 				}
-				d.hash = newH
+				s.hash = newH
 			}
 
-			d.index = newIndex
+			s.index = newIndex
 			d.byteAvailable = false
-			d.length = minMatchLength - 1
+			s.length = minMatchLength - 1
 			if d.tokens.n == maxFlateBlockTokens {
 				// The block includes the current character
-				if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+				if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 					return
 				}
 				d.tokens.n = 0
 			}
 		} else {
 			// Reset, if we got a match this run.
-			if d.length >= minMatchLength {
-				d.ii = 0
+			if s.length >= minMatchLength {
+				s.ii = 0
 			}
 			// We have a byte waiting. Emit it.
 			if d.byteAvailable {
-				d.ii++
-				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+				s.ii++
+				d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 				d.tokens.n++
 				if d.tokens.n == maxFlateBlockTokens {
-					if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+					if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 						return
 					}
 					d.tokens.n = 0
 				}
-				d.index++
+				s.index++
 
 				// If we have a long run of no matches, skip additional bytes
-				// Resets when d.ii overflows after 64KB.
-				if d.ii > 31 {
-					n := int(d.ii >> 6)
+				// Resets when s.ii overflows after 64KB.
+				if s.ii > 31 {
+					n := int(s.ii >> 6)
 					for j := 0; j < n; j++ {
-						if d.index >= d.windowEnd-1 {
+						if s.index >= d.windowEnd-1 {
 							break
 						}
 
-						d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+						d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 						d.tokens.n++
 						if d.tokens.n == maxFlateBlockTokens {
-							if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+							if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 								return
 							}
 							d.tokens.n = 0
 						}
-						d.index++
+						s.index++
 					}
 					// Flush last byte
-					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[d.index-1]))
+					d.tokens.tokens[d.tokens.n] = literalToken(uint32(d.window[s.index-1]))
 					d.tokens.n++
 					d.byteAvailable = false
-					// d.length = minMatchLength - 1 // not needed, since d.ii is reset above, so it should never be > minMatchLength
+					// s.length = minMatchLength - 1 // not needed, since s.ii is reset above, so it should never be > minMatchLength
 					if d.tokens.n == maxFlateBlockTokens {
-						if d.err = d.writeBlock(d.tokens, d.index, false); d.err != nil {
+						if d.err = d.writeBlock(d.tokens, s.index, false); d.err != nil {
 							return
 						}
 						d.tokens.n = 0
 					}
 				}
 			} else {
-				d.index++
+				s.index++
 				d.byteAvailable = true
 			}
 		}
@@ -1167,7 +1180,7 @@ func (d *compressor) init(w io.Writer, level int) (err error) {
 		d.fill = (*compressor).fillBlock
 		d.step = (*compressor).storeHuff
 	case level >= 1 && level <= 4:
-		d.snap = newSnappy(level)
+		d.snap = newFastEnc(level)
 		d.window = make([]byte, maxStoreBlockSize)
 		d.fill = (*compressor).fillBlock
 		d.step = (*compressor).storeSnappy
@@ -1175,6 +1188,7 @@ func (d *compressor) init(w io.Writer, level int) (err error) {
 		level = 5
 		fallthrough
 	case 5 <= level && level <= 9:
+		d.state = &advancedState{}
 		d.compressionLevel = levels[level]
 		d.initDeflate()
 		d.fill = (*compressor).fillDeflate
@@ -1215,22 +1229,23 @@ func (d *compressor) reset(w io.Writer) {
 		// level was NoCompression or ConstantCompresssion.
 		d.windowEnd = 0
 	default:
-		d.chainHead = -1
-		for i := range d.hashHead {
-			d.hashHead[i] = 0
+		s := d.state
+		s.chainHead = -1
+		for i := range s.hashHead {
+			s.hashHead[i] = 0
 		}
-		for i := range d.hashPrev {
-			d.hashPrev[i] = 0
+		for i := range s.hashPrev {
+			s.hashPrev[i] = 0
 		}
-		d.hashOffset = 1
-		d.index, d.windowEnd = 0, 0
+		s.hashOffset = 1
+		s.index, d.windowEnd = 0, 0
 		d.blockStart, d.byteAvailable = 0, false
 		d.tokens.n = 0
-		d.length = minMatchLength - 1
-		d.offset = 0
-		d.hash = 0
-		d.ii = 0
-		d.maxInsertIndex = 0
+		s.length = minMatchLength - 1
+		s.offset = 0
+		s.hash = 0
+		s.ii = 0
+		s.maxInsertIndex = 0
 	}
 }
 
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go
index f9b2a699a..f46c65418 100644
--- a/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go
+++ b/vendor/github.com/klauspost/compress/flate/huffman_bit_writer.go
@@ -35,7 +35,7 @@ const (
 )
 
 // The number of extra bits needed by length code X - LENGTH_CODES_START.
-var lengthExtraBits = []int8{
+var lengthExtraBits = [32]int8{
 	/* 257 */ 0, 0, 0,
 	/* 260 */ 0, 0, 0, 0, 0, 1, 1, 1, 1, 2,
 	/* 270 */ 2, 2, 2, 3, 3, 3, 3, 4, 4, 4,
@@ -43,14 +43,14 @@ var lengthExtraBits = []int8{
 }
 
 // The length indicated by length code X - LENGTH_CODES_START.
-var lengthBase = []uint32{
+var lengthBase = [32]uint8{
 	0, 1, 2, 3, 4, 5, 6, 7, 8, 10,
 	12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
 	64, 80, 96, 112, 128, 160, 192, 224, 255,
 }
 
 // offset code word extra bits.
-var offsetExtraBits = []int8{
+var offsetExtraBits = [64]int8{
 	0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
 	4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
 	9, 9, 10, 10, 11, 11, 12, 12, 13, 13,
@@ -58,7 +58,7 @@ var offsetExtraBits = []int8{
 	14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20,
 }
 
-var offsetBase = []uint32{
+var offsetBase = [64]uint32{
 	/* normal deflate */
 	0x000000, 0x000001, 0x000002, 0x000003, 0x000004,
 	0x000006, 0x000008, 0x00000c, 0x000010, 0x000018,
@@ -86,9 +86,9 @@ type huffmanBitWriter struct {
 	// and then the low nbits of bits.
 	bits            uint64
 	nbits           uint
-	bytes           [bufferSize]byte
+	bytes           [256]byte
 	codegenFreq     [codegenCodeCount]int32
-	nbytes          int
+	nbytes          uint8
 	literalFreq     []int32
 	offsetFreq      []int32
 	codegen         []uint8
@@ -101,8 +101,8 @@ type huffmanBitWriter struct {
 func newHuffmanBitWriter(w io.Writer) *huffmanBitWriter {
 	return &huffmanBitWriter{
 		writer:          w,
-		literalFreq:     make([]int32, maxNumLit),
-		offsetFreq:      make([]int32, offsetCodeCount),
+		literalFreq:     make([]int32, lengthCodesStart+32),
+		offsetFreq:      make([]int32, 32),
 		codegen:         make([]uint8, maxNumLit+offsetCodeCount+1),
 		literalEncoding: newHuffmanEncoder(maxNumLit),
 		codegenEncoding: newHuffmanEncoder(codegenCodeCount),
@@ -113,7 +113,7 @@ func newHuffmanBitWriter(w io.Writer) *huffmanBitWriter {
 func (w *huffmanBitWriter) reset(writer io.Writer) {
 	w.writer = writer
 	w.bits, w.nbits, w.nbytes, w.err = 0, 0, 0, nil
-	w.bytes = [bufferSize]byte{}
+	w.bytes = [256]byte{}
 }
 
 func (w *huffmanBitWriter) flush() {
@@ -145,9 +145,6 @@ func (w *huffmanBitWriter) write(b []byte) {
 }
 
 func (w *huffmanBitWriter) writeBits(b int32, nb uint) {
-	if w.err != nil {
-		return
-	}
 	w.bits |= uint64(b) << w.nbits
 	w.nbits += nb
 	if w.nbits >= 48 {
@@ -155,15 +152,18 @@ func (w *huffmanBitWriter) writeBits(b int32, nb uint) {
 		w.bits >>= 48
 		w.nbits -= 48
 		n := w.nbytes
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
+		w.bytes[n] = byte(bits)
+		w.bytes[n+1] = byte(bits >> 8)
+		w.bytes[n+2] = byte(bits >> 16)
+		w.bytes[n+3] = byte(bits >> 24)
+		w.bytes[n+4] = byte(bits >> 32)
+		w.bytes[n+5] = byte(bits >> 40)
 		n += 6
 		if n >= bufferFlushSize {
+			if w.err != nil {
+				n = 0
+				return
+			}
 			w.write(w.bytes[:n])
 			n = 0
 		}
@@ -333,9 +333,6 @@ func (w *huffmanBitWriter) storedSize(in []byte) (int, bool) {
 }
 
 func (w *huffmanBitWriter) writeCode(c hcode) {
-	if w.err != nil {
-		return
-	}
 	w.bits |= uint64(c.code) << w.nbits
 	w.nbits += uint(c.len)
 	if w.nbits >= 48 {
@@ -343,15 +340,18 @@ func (w *huffmanBitWriter) writeCode(c hcode) {
 		w.bits >>= 48
 		w.nbits -= 48
 		n := w.nbytes
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
+		w.bytes[n] = byte(bits)
+		w.bytes[n+1] = byte(bits >> 8)
+		w.bytes[n+2] = byte(bits >> 16)
+		w.bytes[n+3] = byte(bits >> 24)
+		w.bytes[n+4] = byte(bits >> 32)
+		w.bytes[n+5] = byte(bits >> 40)
 		n += 6
 		if n >= bufferFlushSize {
+			if w.err != nil {
+				n = 0
+				return
+			}
 			w.write(w.bytes[:n])
 			n = 0
 		}
@@ -460,7 +460,7 @@ func (w *huffmanBitWriter) writeBlock(tokens []token, eof bool, input []byte) {
 		}
 		for offsetCode := 4; offsetCode < numOffsets; offsetCode++ {
 			// First four offset codes have extra size = 0.
-			extraBits += int(w.offsetFreq[offsetCode]) * int(offsetExtraBits[offsetCode])
+			extraBits += int(w.offsetFreq[offsetCode]) * int(offsetExtraBits[offsetCode&63])
 		}
 	}
 
@@ -548,15 +548,30 @@ func (w *huffmanBitWriter) indexTokens(tokens []token) (numLiterals, numOffsets
 		w.offsetFreq[i] = 0
 	}
 
+	if len(tokens) == 0 {
+		return
+	}
+
+	// Only last token should be endBlockMarker.
+	if tokens[len(tokens)-1] == endBlockMarker {
+		w.literalFreq[endBlockMarker]++
+		tokens = tokens[:len(tokens)-1]
+	}
+
+	// Create slices up to the next power of two to avoid bounds checks.
+	lits := w.literalFreq[:256]
+	offs := w.offsetFreq[:32]
+	lengths := w.literalFreq[lengthCodesStart:]
+	lengths = lengths[:32]
 	for _, t := range tokens {
-		if t < matchType {
-			w.literalFreq[t.literal()]++
+		if t < endBlockMarker {
+			lits[t.literal()]++
 			continue
 		}
 		length := t.length()
 		offset := t.offset()
-		w.literalFreq[lengthCodesStart+lengthCode(length)]++
-		w.offsetFreq[offsetCode(offset)]++
+		lengths[lengthCode(length)&31]++
+		offs[offsetCode(offset)&31]++
 	}
 
 	// get the number of literals
@@ -575,8 +590,8 @@ func (w *huffmanBitWriter) indexTokens(tokens []token) (numLiterals, numOffsets
 		w.offsetFreq[0] = 1
 		numOffsets = 1
 	}
-	w.literalEncoding.generate(w.literalFreq, 15)
-	w.offsetEncoding.generate(w.offsetFreq, 15)
+	w.literalEncoding.generate(w.literalFreq[:maxNumLit], 15)
+	w.offsetEncoding.generate(w.offsetFreq[:offsetCodeCount], 15)
 	return
 }
 
@@ -586,30 +601,50 @@ func (w *huffmanBitWriter) writeTokens(tokens []token, leCodes, oeCodes []hcode)
 	if w.err != nil {
 		return
 	}
+	if len(tokens) == 0 {
+		return
+	}
+
+	// Only last token should be endBlockMarker.
+	var deferEOB bool
+	if tokens[len(tokens)-1] == endBlockMarker {
+		tokens = tokens[:len(tokens)-1]
+		deferEOB = true
+	}
+
+	// Create slices up to the next power of two to avoid bounds checks.
+	lits := leCodes[:256]
+	offs := oeCodes[:32]
+	lengths := leCodes[lengthCodesStart:]
+	lengths = lengths[:32]
 	for _, t := range tokens {
 		if t < matchType {
-			w.writeCode(leCodes[t.literal()])
+			w.writeCode(lits[t.literal()])
 			continue
 		}
+
 		// Write the length
 		length := t.length()
 		lengthCode := lengthCode(length)
-		w.writeCode(leCodes[lengthCode+lengthCodesStart])
-		extraLengthBits := uint(lengthExtraBits[lengthCode])
+		w.writeCode(lengths[lengthCode&31])
+		extraLengthBits := uint(lengthExtraBits[lengthCode&31])
 		if extraLengthBits > 0 {
-			extraLength := int32(length - lengthBase[lengthCode])
+			extraLength := int32(length - lengthBase[lengthCode&31])
 			w.writeBits(extraLength, extraLengthBits)
 		}
 		// Write the offset
 		offset := t.offset()
 		offsetCode := offsetCode(offset)
-		w.writeCode(oeCodes[offsetCode])
-		extraOffsetBits := uint(offsetExtraBits[offsetCode])
+		w.writeCode(offs[offsetCode&31])
+		extraOffsetBits := uint(offsetExtraBits[offsetCode&63])
 		if extraOffsetBits > 0 {
-			extraOffset := int32(offset - offsetBase[offsetCode])
+			extraOffset := int32(offset - offsetBase[offsetCode&63])
 			w.writeBits(extraOffset, extraOffsetBits)
 		}
 	}
+	if deferEOB {
+		w.writeCode(leCodes[endBlockMarker])
+	}
 }
 
 // huffOffset is a static offset encoder used for huffman only encoding.
@@ -620,7 +655,7 @@ func init() {
 	w := newHuffmanBitWriter(nil)
 	w.offsetFreq[0] = 1
 	huffOffset = newHuffmanEncoder(offsetCodeCount)
-	huffOffset.generate(w.offsetFreq, 15)
+	huffOffset.generate(w.offsetFreq[:offsetCodeCount], 15)
 }
 
 // writeBlockHuff encodes a block of bytes as either
@@ -644,7 +679,7 @@ func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte) {
 	const numLiterals = endBlockMarker + 1
 	const numOffsets = 1
 
-	w.literalEncoding.generate(w.literalFreq, 15)
+	w.literalEncoding.generate(w.literalFreq[:maxNumLit], 15)
 
 	// Figure out smallest code.
 	// Always use dynamic Huffman or Store
@@ -679,13 +714,12 @@ func (w *huffmanBitWriter) writeBlockHuff(eof bool, input []byte) {
 		bits := w.bits
 		w.bits >>= 48
 		w.nbits -= 48
-		bytes := w.bytes[n : n+6]
-		bytes[0] = byte(bits)
-		bytes[1] = byte(bits >> 8)
-		bytes[2] = byte(bits >> 16)
-		bytes[3] = byte(bits >> 24)
-		bytes[4] = byte(bits >> 32)
-		bytes[5] = byte(bits >> 40)
+		w.bytes[n] = byte(bits)
+		w.bytes[n+1] = byte(bits >> 8)
+		w.bytes[n+2] = byte(bits >> 16)
+		w.bytes[n+3] = byte(bits >> 24)
+		w.bytes[n+4] = byte(bits >> 32)
+		w.bytes[n+5] = byte(bits >> 40)
 		n += 6
 		if n < bufferFlushSize {
 			continue
diff --git a/vendor/github.com/klauspost/compress/flate/huffman_code.go b/vendor/github.com/klauspost/compress/flate/huffman_code.go
index bdcbd823b..f65f79336 100644
--- a/vendor/github.com/klauspost/compress/flate/huffman_code.go
+++ b/vendor/github.com/klauspost/compress/flate/huffman_code.go
@@ -6,6 +6,7 @@ package flate
 
 import (
 	"math"
+	"math/bits"
 	"sort"
 )
 
@@ -56,7 +57,9 @@ func (h *hcode) set(code uint16, length uint16) {
 func maxNode() literalNode { return literalNode{math.MaxUint16, math.MaxInt32} }
 
 func newHuffmanEncoder(size int) *huffmanEncoder {
-	return &huffmanEncoder{codes: make([]hcode, size)}
+	// Make capacity to next power of two.
+	c := uint(bits.Len32(uint32(size - 1)))
+	return &huffmanEncoder{codes: make([]hcode, size, 1<<c)}
 }
 
 // Generates a HuffmanCode corresponding to the fixed literal table
diff --git a/vendor/github.com/klauspost/compress/flate/snappy.go b/vendor/github.com/klauspost/compress/flate/snappy.go
index d853320a7..aebebd524 100644
--- a/vendor/github.com/klauspost/compress/flate/snappy.go
+++ b/vendor/github.com/klauspost/compress/flate/snappy.go
@@ -20,12 +20,12 @@ func emitCopy(dst *tokens, offset, length int) {
 	dst.n++
 }
 
-type snappyEnc interface {
+type fastEnc interface {
 	Encode(dst *tokens, src []byte)
 	Reset()
 }
 
-func newSnappy(level int) snappyEnc {
+func newFastEnc(level int) fastEnc {
 	switch level {
 	case 1:
 		return &snappyL1{}
diff --git a/vendor/github.com/klauspost/compress/flate/token.go b/vendor/github.com/klauspost/compress/flate/token.go
index 4f275ea61..141299b97 100644
--- a/vendor/github.com/klauspost/compress/flate/token.go
+++ b/vendor/github.com/klauspost/compress/flate/token.go
@@ -4,8 +4,6 @@
 
 package flate
 
-import "fmt"
-
 const (
 	// 2 bits:   type   0 = literal  1=EOF  2=Match   3=Unused
 	// 8 bits:   xlength = length - MIN_MATCH_LENGTH
@@ -19,7 +17,7 @@ const (
 
 // The length code for length X (MIN_MATCH_LENGTH <= X <= MAX_MATCH_LENGTH)
 // is lengthCodes[length - MIN_MATCH_LENGTH]
-var lengthCodes = [...]uint32{
+var lengthCodes = [256]uint8{
 	0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
 	9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
 	13, 13, 13, 13, 14, 14, 14, 14, 15, 15,
@@ -48,7 +46,7 @@ var lengthCodes = [...]uint32{
 	27, 27, 27, 27, 27, 28,
 }
 
-var offsetCodes = [...]uint32{
+var offsetCodes = [256]uint32{
 	0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
 	8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,
 	10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
@@ -82,34 +80,27 @@ func matchToken(xlength uint32, xoffset uint32) token {
 	return token(matchType + xlength<<lengthShift + xoffset)
 }
 
-func matchTokend(xlength uint32, xoffset uint32) token {
-	if xlength > maxMatchLength || xoffset > maxMatchOffset {
-		panic(fmt.Sprintf("Invalid match: len: %d, offset: %d\n", xlength, xoffset))
-		return token(matchType)
-	}
-	return token(matchType + xlength<<lengthShift + xoffset)
-}
-
 // Returns the type of a token
 func (t token) typ() uint32 { return uint32(t) & typeMask }
 
 // Returns the literal of a literal token
-func (t token) literal() uint32 { return uint32(t - literalType) }
+func (t token) literal() uint8 { return uint8(t) }
 
 // Returns the extra offset of a match token
 func (t token) offset() uint32 { return uint32(t) & offsetMask }
 
-func (t token) length() uint32 { return uint32((t - matchType) >> lengthShift) }
+func (t token) length() uint8 { return uint8(t >> lengthShift) }
 
-func lengthCode(len uint32) uint32 { return lengthCodes[len] }
+// The code is never more than 8 bits, but is returned as uint32 for convenience.
+func lengthCode(len uint8) uint32 { return uint32(lengthCodes[len]) }
 
 // Returns the offset code corresponding to a specific offset
 func offsetCode(off uint32) uint32 {
 	if off < uint32(len(offsetCodes)) {
-		return offsetCodes[off]
+		return offsetCodes[off&255]
 	} else if off>>7 < uint32(len(offsetCodes)) {
-		return offsetCodes[off>>7] + 14
+		return offsetCodes[(off>>7)&255] + 14
 	} else {
-		return offsetCodes[off>>14] + 28
+		return offsetCodes[(off>>14)&255] + 28
 	}
 }
diff --git a/vendor/github.com/klauspost/cpuid/README.md b/vendor/github.com/klauspost/cpuid/README.md
index b2b6bee87..a7fb41fbe 100644
--- a/vendor/github.com/klauspost/cpuid/README.md
+++ b/vendor/github.com/klauspost/cpuid/README.md
@@ -83,6 +83,8 @@ Package home: https://github.com/klauspost/cpuid
 * **MSVM** (Microsoft Hyper-V or Windows Virtual PC)
 * **VMware**
 * **XenHVM**
+* **Bhyve**
+* **Hygon**
 
 # installing
 
diff --git a/vendor/github.com/klauspost/cpuid/cpuid.go b/vendor/github.com/klauspost/cpuid/cpuid.go
index 60c681bed..db9591321 100644
--- a/vendor/github.com/klauspost/cpuid/cpuid.go
+++ b/vendor/github.com/klauspost/cpuid/cpuid.go
@@ -26,6 +26,8 @@ const (
 	MSVM // Microsoft Hyper-V or Windows Virtual PC
 	VMware
 	XenHVM
+	Bhyve
+	Hygon
 )
 
 const (
@@ -472,6 +474,11 @@ func (c CPUInfo) AMD() bool {
 	return c.VendorID == AMD
 }
 
+// Hygon returns true if vendor is recognized as Hygon
+func (c CPUInfo) Hygon() bool {
+	return c.VendorID == Hygon
+}
+
 // Transmeta returns true if vendor is recognized as Transmeta
 func (c CPUInfo) Transmeta() bool {
 	return c.VendorID == Transmeta
@@ -527,7 +534,7 @@ func (c CPUInfo) LogicalCPU() int {
 // have many false negatives.
 func (c CPUInfo) VM() bool {
 	switch c.VendorID {
-	case MSVM, KVM, VMware, XenHVM:
+	case MSVM, KVM, VMware, XenHVM, Bhyve:
 		return true
 	}
 	return false
@@ -625,7 +632,7 @@ func logicalCores() int {
 		}
 		_, b, _, _ := cpuidex(0xb, 1)
 		return int(b & 0xffff)
-	case AMD:
+	case AMD, Hygon:
 		_, b, _, _ := cpuid(1)
 		return int((b >> 16) & 0xff)
 	default:
@@ -647,7 +654,7 @@ func physicalCores() int {
 	switch vendorID() {
 	case Intel:
 		return logicalCores() / threadsPerCore()
-	case AMD:
+	case AMD, Hygon:
 		if maxExtendedFunction() >= 0x80000008 {
 			_, _, c, _ := cpuid(0x80000008)
 			return int(c&0xff) + 1
@@ -670,6 +677,8 @@ var vendorMapping = map[string]Vendor{
 	"Microsoft Hv": MSVM,
 	"VMwareVMware": VMware,
 	"XenVMMXenVMM": XenHVM,
+	"bhyve bhyve ": Bhyve,
+	"HygonGenuine": Hygon,
 }
 
 func vendorID() Vendor {
@@ -742,7 +751,7 @@ func (c *CPUInfo) cacheSize() {
 				c.Cache.L3 = size
 			}
 		}
-	case AMD:
+	case AMD, Hygon:
 		// Untested.
 		if maxExtendedFunction() < 0x80000005 {
 			return
diff --git a/vendor/github.com/mattn/go-isatty/go.mod b/vendor/github.com/mattn/go-isatty/go.mod
new file mode 100644
index 000000000..f310320c3
--- /dev/null
+++ b/vendor/github.com/mattn/go-isatty/go.mod
@@ -0,0 +1,3 @@
+module github.com/mattn/go-isatty
+
+require golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223
diff --git a/vendor/github.com/mattn/go-isatty/go.sum b/vendor/github.com/mattn/go-isatty/go.sum
new file mode 100644
index 000000000..426c8973c
--- /dev/null
+++ b/vendor/github.com/mattn/go-isatty/go.sum
@@ -0,0 +1,2 @@
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
diff --git a/vendor/github.com/mattn/go-isatty/isatty_linux.go b/vendor/github.com/mattn/go-isatty/isatty_android.go
index 7384cf991..d3567cb5b 100644
--- a/vendor/github.com/mattn/go-isatty/isatty_linux.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_android.go
@@ -1,5 +1,4 @@
-// +build linux
-// +build !appengine,!ppc64,!ppc64le
+// +build android
 
 package isatty
 
@@ -16,3 +15,9 @@ func IsTerminal(fd uintptr) bool {
 	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 	return err == 0
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}
diff --git a/vendor/github.com/mattn/go-isatty/isatty_appengine.go b/vendor/github.com/mattn/go-isatty/isatty_appengine.go
deleted file mode 100644
index 9584a9884..000000000
--- a/vendor/github.com/mattn/go-isatty/isatty_appengine.go
+++ /dev/null
@@ -1,15 +0,0 @@
-// +build appengine
-
-package isatty
-
-// IsTerminal returns true if the file descriptor is terminal which
-// is always false on on appengine classic which is a sandboxed PaaS.
-func IsTerminal(fd uintptr) bool {
-	return false
-}
-
-// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
-// terminal. This is also always false on this environment.
-func IsCygwinTerminal(fd uintptr) bool {
-	return false
-}
diff --git a/vendor/github.com/mattn/go-isatty/isatty_bsd.go b/vendor/github.com/mattn/go-isatty/isatty_bsd.go
index 42f2514d1..07e93039d 100644
--- a/vendor/github.com/mattn/go-isatty/isatty_bsd.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_bsd.go
@@ -16,3 +16,9 @@ func IsTerminal(fd uintptr) bool {
 	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 	return err == 0
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}
diff --git a/vendor/github.com/mattn/go-isatty/isatty_linux_ppc64x.go b/vendor/github.com/mattn/go-isatty/isatty_linux_ppc64x.go
deleted file mode 100644
index 44e5d2130..000000000
--- a/vendor/github.com/mattn/go-isatty/isatty_linux_ppc64x.go
+++ /dev/null
@@ -1,19 +0,0 @@
-// +build linux
-// +build ppc64 ppc64le
-
-package isatty
-
-import (
-	"unsafe"
-
-	syscall "golang.org/x/sys/unix"
-)
-
-const ioctlReadTermios = syscall.TCGETS
-
-// IsTerminal return true if the file descriptor is terminal.
-func IsTerminal(fd uintptr) bool {
-	var termios syscall.Termios
-	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
-	return err == 0
-}
diff --git a/vendor/github.com/mattn/go-isatty/isatty_others.go b/vendor/github.com/mattn/go-isatty/isatty_others.go
index 9d8b4a599..ff714a376 100644
--- a/vendor/github.com/mattn/go-isatty/isatty_others.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_others.go
@@ -1,9 +1,14 @@
-// +build !windows
-// +build !appengine
+// +build appengine js nacl
 
 package isatty
 
-// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// IsTerminal returns true if the file descriptor is terminal which
+// is always false on js and appengine classic which is a sandboxed PaaS.
+func IsTerminal(fd uintptr) bool {
+	return false
+}
+
+// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
 // terminal. This is also always false on this environment.
 func IsCygwinTerminal(fd uintptr) bool {
 	return false
diff --git a/vendor/github.com/mattn/go-isatty/isatty_solaris.go b/vendor/github.com/mattn/go-isatty/isatty_solaris.go
index 1f0c6bf53..bdd5c79a0 100644
--- a/vendor/github.com/mattn/go-isatty/isatty_solaris.go
+++ b/vendor/github.com/mattn/go-isatty/isatty_solaris.go
@@ -14,3 +14,9 @@ func IsTerminal(fd uintptr) bool {
 	err := unix.IoctlSetTermio(int(fd), unix.TCGETA, &termio)
 	return err == nil
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}
diff --git a/vendor/github.com/mattn/go-isatty/isatty_tcgets.go b/vendor/github.com/mattn/go-isatty/isatty_tcgets.go
new file mode 100644
index 000000000..453b025d0
--- /dev/null
+++ b/vendor/github.com/mattn/go-isatty/isatty_tcgets.go
@@ -0,0 +1,19 @@
+// +build linux aix
+// +build !appengine
+// +build !android
+
+package isatty
+
+import "golang.org/x/sys/unix"
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	_, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
+	return err == nil
+}
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE b/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE
new file mode 100644
index 000000000..8dada3eda
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE b/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE
new file mode 100644
index 000000000..5d8cb5b72
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/NOTICE
@@ -0,0 +1 @@
+Copyright 2012 Matt T. Proud (matt.proud@gmail.com)
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore
new file mode 100644
index 000000000..e16fb946b
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/.gitignore
@@ -0,0 +1 @@
+cover.dat
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile
new file mode 100644
index 000000000..81be21437
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/Makefile
@@ -0,0 +1,7 @@
+all:
+
+cover:
+	go test -cover -v -coverprofile=cover.dat ./...
+	go tool cover -func cover.dat
+
+.PHONY: cover
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go
new file mode 100644
index 000000000..258c0636a
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/decode.go
@@ -0,0 +1,75 @@
+// Copyright 2013 Matt T. Proud
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pbutil
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+
+	"github.com/golang/protobuf/proto"
+)
+
+var errInvalidVarint = errors.New("invalid varint32 encountered")
+
+// ReadDelimited decodes a message from the provided length-delimited stream,
+// where the length is encoded as 32-bit varint prefix to the message body.
+// It returns the total number of bytes read and any applicable error.  This is
+// roughly equivalent to the companion Java API's
+// MessageLite#parseDelimitedFrom.  As per the reader contract, this function
+// calls r.Read repeatedly as required until exactly one message including its
+// prefix is read and decoded (or an error has occurred).  The function never
+// reads more bytes from the stream than required.  The function never returns
+// an error if a message has been read and decoded correctly, even if the end
+// of the stream has been reached in doing so.  In that case, any subsequent
+// calls return (0, io.EOF).
+func ReadDelimited(r io.Reader, m proto.Message) (n int, err error) {
+	// Per AbstractParser#parsePartialDelimitedFrom with
+	// CodedInputStream#readRawVarint32.
+	var headerBuf [binary.MaxVarintLen32]byte
+	var bytesRead, varIntBytes int
+	var messageLength uint64
+	for varIntBytes == 0 { // i.e. no varint has been decoded yet.
+		if bytesRead >= len(headerBuf) {
+			return bytesRead, errInvalidVarint
+		}
+		// We have to read byte by byte here to avoid reading more bytes
+		// than required. Each read byte is appended to what we have
+		// read before.
+		newBytesRead, err := r.Read(headerBuf[bytesRead : bytesRead+1])
+		if newBytesRead == 0 {
+			if err != nil {
+				return bytesRead, err
+			}
+			// A Reader should not return (0, nil), but if it does,
+			// it should be treated as no-op (according to the
+			// Reader contract). So let's go on...
+			continue
+		}
+		bytesRead += newBytesRead
+		// Now present everything read so far to the varint decoder and
+		// see if a varint can be decoded already.
+		messageLength, varIntBytes = proto.DecodeVarint(headerBuf[:bytesRead])
+	}
+
+	messageBuf := make([]byte, messageLength)
+	newBytesRead, err := io.ReadFull(r, messageBuf)
+	bytesRead += newBytesRead
+	if err != nil {
+		return bytesRead, err
+	}
+
+	return bytesRead, proto.Unmarshal(messageBuf, m)
+}
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go
new file mode 100644
index 000000000..c318385cb
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/doc.go
@@ -0,0 +1,16 @@
+// Copyright 2013 Matt T. Proud
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package pbutil provides record length-delimited Protocol Buffer streaming.
+package pbutil
diff --git a/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go
new file mode 100644
index 000000000..8fb59ad22
--- /dev/null
+++ b/vendor/github.com/matttproud/golang_protobuf_extensions/pbutil/encode.go
@@ -0,0 +1,46 @@
+// Copyright 2013 Matt T. Proud
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pbutil
+
+import (
+	"encoding/binary"
+	"io"
+
+	"github.com/golang/protobuf/proto"
+)
+
+// WriteDelimited encodes and dumps a message to the provided writer prefixed
+// with a 32-bit varint indicating the length of the encoded message, producing
+// a length-delimited record stream, which can be used to chain together
+// encoded messages of the same type together in a file.  It returns the total
+// number of bytes written and any applicable error.  This is roughly
+// equivalent to the companion Java API's MessageLite#writeDelimitedTo.
+func WriteDelimited(w io.Writer, m proto.Message) (n int, err error) {
+	buffer, err := proto.Marshal(m)
+	if err != nil {
+		return 0, err
+	}
+
+	var buf [binary.MaxVarintLen32]byte
+	encodedLength := binary.PutUvarint(buf[:], uint64(len(buffer)))
+
+	sync, err := w.Write(buf[:encodedLength])
+	if err != nil {
+		return sync, err
+	}
+
+	n, err = w.Write(buffer)
+	return n + sync, err
+}
diff --git a/vendor/github.com/onsi/gomega/.travis.yml b/vendor/github.com/onsi/gomega/.travis.yml
index 4d71367f6..2420a5d07 100644
--- a/vendor/github.com/onsi/gomega/.travis.yml
+++ b/vendor/github.com/onsi/gomega/.travis.yml
@@ -1,12 +1,9 @@
 language: go
 
 go:
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
   - 1.10.x
   - 1.11.x
+  - 1.12.x
 
 env:
   - GO111MODULE=on
@@ -17,7 +14,4 @@ install:
   - go get github.com/onsi/ginkgo
   - go install github.com/onsi/ginkgo/ginkgo
 
-script: |
-  $HOME/gopath/bin/ginkgo -p -r --randomizeAllSpecs --failOnPending --randomizeSuites --race &&
-  go vet &&
-  [ -z "`gofmt -l -e -s -w .`" ]
+script: make test
diff --git a/vendor/github.com/onsi/gomega/CHANGELOG.md b/vendor/github.com/onsi/gomega/CHANGELOG.md
index 9153294f7..5d1eda837 100644
--- a/vendor/github.com/onsi/gomega/CHANGELOG.md
+++ b/vendor/github.com/onsi/gomega/CHANGELOG.md
@@ -1,3 +1,14 @@
+## 1.5.0
+
+### Features
+
+- Added MatchKeys matchers [8b909fc]
+
+### Fixes and Minor Improvements
+
+- Add type aliases to remove stuttering [03b0461]
+- Don't run session_test.go on windows (#324) [5533ce8]
+
 ## 1.4.3
 
 ### Fixes:
diff --git a/vendor/github.com/onsi/gomega/Makefile b/vendor/github.com/onsi/gomega/Makefile
new file mode 100644
index 000000000..c92cd56e3
--- /dev/null
+++ b/vendor/github.com/onsi/gomega/Makefile
@@ -0,0 +1,6 @@
+test:
+	[ -z "`gofmt -s -w -l -e .`" ]
+	go vet
+	ginkgo -p -r --randomizeAllSpecs --failOnPending --randomizeSuites --race
+
+.PHONY: test
diff --git a/vendor/github.com/onsi/gomega/gomega_dsl.go b/vendor/github.com/onsi/gomega/gomega_dsl.go
index 471f691a6..448d595da 100644
--- a/vendor/github.com/onsi/gomega/gomega_dsl.go
+++ b/vendor/github.com/onsi/gomega/gomega_dsl.go
@@ -24,7 +24,7 @@ import (
 	"github.com/onsi/gomega/types"
 )
 
-const GOMEGA_VERSION = "1.4.3"
+const GOMEGA_VERSION = "1.5.0"
 
 const nilFailHandlerPanic = `You are trying to make an assertion, but Gomega's fail handler is nil.
 If you're using Ginkgo then you probably forgot to put your assertion in an It().
@@ -39,20 +39,14 @@ var defaultEventuallyPollingInterval = 10 * time.Millisecond
 var defaultConsistentlyDuration = 100 * time.Millisecond
 var defaultConsistentlyPollingInterval = 10 * time.Millisecond
 
-//RegisterFailHandler connects Ginkgo to Gomega.  When a matcher fails
-//the fail handler passed into RegisterFailHandler is called.
+// RegisterFailHandler connects Ginkgo to Gomega. When a matcher fails
+// the fail handler passed into RegisterFailHandler is called.
 func RegisterFailHandler(handler types.GomegaFailHandler) {
-	if handler == nil {
-		globalFailWrapper = nil
-		return
-	}
-
-	globalFailWrapper = &types.GomegaFailWrapper{
-		Fail:        handler,
-		TWithHelper: testingtsupport.EmptyTWithHelper{},
-	}
+	RegisterFailHandlerWithT(testingtsupport.EmptyTWithHelper{}, handler)
 }
 
+// RegisterFailHandlerWithT ensures that the given types.TWithHelper and fail handler
+// are used globally.
 func RegisterFailHandlerWithT(t types.TWithHelper, handler types.GomegaFailHandler) {
 	if handler == nil {
 		globalFailWrapper = nil
@@ -65,12 +59,12 @@ func RegisterFailHandlerWithT(t types.TWithHelper, handler types.GomegaFailHandl
 	}
 }
 
-//RegisterTestingT connects Gomega to Golang's XUnit style
-//Testing.T tests.  It is now deprecated and you should use NewGomegaWithT() instead.
+// RegisterTestingT connects Gomega to Golang's XUnit style
+// Testing.T tests.  It is now deprecated and you should use NewWithT() instead.
 //
-//Legacy Documentation:
+// Legacy Documentation:
 //
-//You'll need to call this at the top of each XUnit style test:
+// You'll need to call this at the top of each XUnit style test:
 //
 //    func TestFarmHasCow(t *testing.T) {
 //        RegisterTestingT(t)
@@ -83,7 +77,7 @@ func RegisterFailHandlerWithT(t types.TWithHelper, handler types.GomegaFailHandl
 // pass `t` down to the matcher itself).  This means that you cannot run the XUnit style tests
 // in parallel as the global fail handler cannot point to more than one testing.T at a time.
 //
-// NewGomegaWithT() does not have this limitation
+// NewWithT() does not have this limitation
 //
 // (As an aside: Ginkgo gets around this limitation by running parallel tests in different *processes*).
 func RegisterTestingT(t types.GomegaTestingT) {
@@ -95,15 +89,15 @@ func RegisterTestingT(t types.GomegaTestingT) {
 	RegisterFailHandlerWithT(tWithHelper, testingtsupport.BuildTestingTGomegaFailWrapper(t).Fail)
 }
 
-//InterceptGomegaHandlers runs a given callback and returns an array of
-//failure messages generated by any Gomega assertions within the callback.
+// InterceptGomegaFailures runs a given callback and returns an array of
+// failure messages generated by any Gomega assertions within the callback.
 //
-//This is accomplished by temporarily replacing the *global* fail handler
-//with a fail handler that simply annotates failures.  The original fail handler
-//is reset when InterceptGomegaFailures returns.
+// This is accomplished by temporarily replacing the *global* fail handler
+// with a fail handler that simply annotates failures.  The original fail handler
+// is reset when InterceptGomegaFailures returns.
 //
-//This is most useful when testing custom matchers, but can also be used to check
-//on a value using a Gomega assertion without causing a test failure.
+// This is most useful when testing custom matchers, but can also be used to check
+// on a value using a Gomega assertion without causing a test failure.
 func InterceptGomegaFailures(f func()) []string {
 	originalHandler := globalFailWrapper.Fail
 	failures := []string{}
@@ -115,108 +109,108 @@ func InterceptGomegaFailures(f func()) []string {
 	return failures
 }
 
-//Ω wraps an actual value allowing assertions to be made on it:
+// Ω wraps an actual value allowing assertions to be made on it:
 //    Ω("foo").Should(Equal("foo"))
 //
-//If Ω is passed more than one argument it will pass the *first* argument to the matcher.
-//All subsequent arguments will be required to be nil/zero.
+// If Ω is passed more than one argument it will pass the *first* argument to the matcher.
+// All subsequent arguments will be required to be nil/zero.
 //
-//This is convenient if you want to make an assertion on a method/function that returns
-//a value and an error - a common patter in Go.
+// This is convenient if you want to make an assertion on a method/function that returns
+// a value and an error - a common patter in Go.
 //
-//For example, given a function with signature:
-//  func MyAmazingThing() (int, error)
+// For example, given a function with signature:
+//    func MyAmazingThing() (int, error)
 //
-//Then:
+// Then:
 //    Ω(MyAmazingThing()).Should(Equal(3))
-//Will succeed only if `MyAmazingThing()` returns `(3, nil)`
+// Will succeed only if `MyAmazingThing()` returns `(3, nil)`
 //
-//Ω and Expect are identical
-func Ω(actual interface{}, extra ...interface{}) GomegaAssertion {
+// Ω and Expect are identical
+func Ω(actual interface{}, extra ...interface{}) Assertion {
 	return ExpectWithOffset(0, actual, extra...)
 }
 
-//Expect wraps an actual value allowing assertions to be made on it:
+// Expect wraps an actual value allowing assertions to be made on it:
 //    Expect("foo").To(Equal("foo"))
 //
-//If Expect is passed more than one argument it will pass the *first* argument to the matcher.
-//All subsequent arguments will be required to be nil/zero.
+// If Expect is passed more than one argument it will pass the *first* argument to the matcher.
+// All subsequent arguments will be required to be nil/zero.
 //
-//This is convenient if you want to make an assertion on a method/function that returns
-//a value and an error - a common patter in Go.
+// This is convenient if you want to make an assertion on a method/function that returns
+// a value and an error - a common patter in Go.
 //
-//For example, given a function with signature:
-//  func MyAmazingThing() (int, error)
+// For example, given a function with signature:
+//    func MyAmazingThing() (int, error)
 //
-//Then:
+// Then:
 //    Expect(MyAmazingThing()).Should(Equal(3))
-//Will succeed only if `MyAmazingThing()` returns `(3, nil)`
+// Will succeed only if `MyAmazingThing()` returns `(3, nil)`
 //
-//Expect and Ω are identical
-func Expect(actual interface{}, extra ...interface{}) GomegaAssertion {
+// Expect and Ω are identical
+func Expect(actual interface{}, extra ...interface{}) Assertion {
 	return ExpectWithOffset(0, actual, extra...)
 }
 
-//ExpectWithOffset wraps an actual value allowing assertions to be made on it:
+// ExpectWithOffset wraps an actual value allowing assertions to be made on it:
 //    ExpectWithOffset(1, "foo").To(Equal("foo"))
 //
-//Unlike `Expect` and `Ω`, `ExpectWithOffset` takes an additional integer argument
-//this is used to modify the call-stack offset when computing line numbers.
+// Unlike `Expect` and `Ω`, `ExpectWithOffset` takes an additional integer argument
+// this is used to modify the call-stack offset when computing line numbers.
 //
-//This is most useful in helper functions that make assertions.  If you want Gomega's
-//error message to refer to the calling line in the test (as opposed to the line in the helper function)
-//set the first argument of `ExpectWithOffset` appropriately.
-func ExpectWithOffset(offset int, actual interface{}, extra ...interface{}) GomegaAssertion {
+// This is most useful in helper functions that make assertions.  If you want Gomega's
+// error message to refer to the calling line in the test (as opposed to the line in the helper function)
+// set the first argument of `ExpectWithOffset` appropriately.
+func ExpectWithOffset(offset int, actual interface{}, extra ...interface{}) Assertion {
 	if globalFailWrapper == nil {
 		panic(nilFailHandlerPanic)
 	}
 	return assertion.New(actual, globalFailWrapper, offset, extra...)
 }
 
-//Eventually wraps an actual value allowing assertions to be made on it.
-//The assertion is tried periodically until it passes or a timeout occurs.
+// Eventually wraps an actual value allowing assertions to be made on it.
+// The assertion is tried periodically until it passes or a timeout occurs.
 //
-//Both the timeout and polling interval are configurable as optional arguments:
-//The first optional argument is the timeout
-//The second optional argument is the polling interval
+// Both the timeout and polling interval are configurable as optional arguments:
+// The first optional argument is the timeout
+// The second optional argument is the polling interval
 //
-//Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
-//last case they are interpreted as seconds.
+// Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
+// last case they are interpreted as seconds.
 //
-//If Eventually is passed an actual that is a function taking no arguments and returning at least one value,
-//then Eventually will call the function periodically and try the matcher against the function's first return value.
+// If Eventually is passed an actual that is a function taking no arguments and returning at least one value,
+// then Eventually will call the function periodically and try the matcher against the function's first return value.
 //
-//Example:
+// Example:
 //
 //    Eventually(func() int {
 //        return thingImPolling.Count()
 //    }).Should(BeNumerically(">=", 17))
 //
-//Note that this example could be rewritten:
+// Note that this example could be rewritten:
 //
 //    Eventually(thingImPolling.Count).Should(BeNumerically(">=", 17))
 //
-//If the function returns more than one value, then Eventually will pass the first value to the matcher and
-//assert that all other values are nil/zero.
-//This allows you to pass Eventually a function that returns a value and an error - a common pattern in Go.
+// If the function returns more than one value, then Eventually will pass the first value to the matcher and
+// assert that all other values are nil/zero.
+// This allows you to pass Eventually a function that returns a value and an error - a common pattern in Go.
 //
-//For example, consider a method that returns a value and an error:
+// For example, consider a method that returns a value and an error:
 //    func FetchFromDB() (string, error)
 //
-//Then
+// Then
 //    Eventually(FetchFromDB).Should(Equal("hasselhoff"))
 //
-//Will pass only if the the returned error is nil and the returned string passes the matcher.
+// Will pass only if the the returned error is nil and the returned string passes the matcher.
 //
-//Eventually's default timeout is 1 second, and its default polling interval is 10ms
-func Eventually(actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// Eventually's default timeout is 1 second, and its default polling interval is 10ms
+func Eventually(actual interface{}, intervals ...interface{}) AsyncAssertion {
 	return EventuallyWithOffset(0, actual, intervals...)
 }
 
-//EventuallyWithOffset operates like Eventually but takes an additional
-//initial argument to indicate an offset in the call stack.  This is useful when building helper
-//functions that contain matchers.  To learn more, read about `ExpectWithOffset`.
-func EventuallyWithOffset(offset int, actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// EventuallyWithOffset operates like Eventually but takes an additional
+// initial argument to indicate an offset in the call stack.  This is useful when building helper
+// functions that contain matchers.  To learn more, read about `ExpectWithOffset`.
+func EventuallyWithOffset(offset int, actual interface{}, intervals ...interface{}) AsyncAssertion {
 	if globalFailWrapper == nil {
 		panic(nilFailHandlerPanic)
 	}
@@ -231,37 +225,37 @@ func EventuallyWithOffset(offset int, actual interface{}, intervals ...interface
 	return asyncassertion.New(asyncassertion.AsyncAssertionTypeEventually, actual, globalFailWrapper, timeoutInterval, pollingInterval, offset)
 }
 
-//Consistently wraps an actual value allowing assertions to be made on it.
-//The assertion is tried periodically and is required to pass for a period of time.
+// Consistently wraps an actual value allowing assertions to be made on it.
+// The assertion is tried periodically and is required to pass for a period of time.
 //
-//Both the total time and polling interval are configurable as optional arguments:
-//The first optional argument is the duration that Consistently will run for
-//The second optional argument is the polling interval
+// Both the total time and polling interval are configurable as optional arguments:
+// The first optional argument is the duration that Consistently will run for
+// The second optional argument is the polling interval
 //
-//Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
-//last case they are interpreted as seconds.
+// Both intervals can either be specified as time.Duration, parsable duration strings or as floats/integers.  In the
+// last case they are interpreted as seconds.
 //
-//If Consistently is passed an actual that is a function taking no arguments and returning at least one value,
-//then Consistently will call the function periodically and try the matcher against the function's first return value.
+// If Consistently is passed an actual that is a function taking no arguments and returning at least one value,
+// then Consistently will call the function periodically and try the matcher against the function's first return value.
 //
-//If the function returns more than one value, then Consistently will pass the first value to the matcher and
-//assert that all other values are nil/zero.
-//This allows you to pass Consistently a function that returns a value and an error - a common pattern in Go.
+// If the function returns more than one value, then Consistently will pass the first value to the matcher and
+// assert that all other values are nil/zero.
+// This allows you to pass Consistently a function that returns a value and an error - a common pattern in Go.
 //
-//Consistently is useful in cases where you want to assert that something *does not happen* over a period of tiem.
-//For example, you want to assert that a goroutine does *not* send data down a channel.  In this case, you could:
+// Consistently is useful in cases where you want to assert that something *does not happen* over a period of tiem.
+// For example, you want to assert that a goroutine does *not* send data down a channel.  In this case, you could:
 //
-//  Consistently(channel).ShouldNot(Receive())
+//   Consistently(channel).ShouldNot(Receive())
 //
-//Consistently's default duration is 100ms, and its default polling interval is 10ms
-func Consistently(actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// Consistently's default duration is 100ms, and its default polling interval is 10ms
+func Consistently(actual interface{}, intervals ...interface{}) AsyncAssertion {
 	return ConsistentlyWithOffset(0, actual, intervals...)
 }
 
-//ConsistentlyWithOffset operates like Consistnetly but takes an additional
-//initial argument to indicate an offset in the call stack.  This is useful when building helper
-//functions that contain matchers.  To learn more, read about `ExpectWithOffset`.
-func ConsistentlyWithOffset(offset int, actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// ConsistentlyWithOffset operates like Consistnetly but takes an additional
+// initial argument to indicate an offset in the call stack. This is useful when building helper
+// functions that contain matchers. To learn more, read about `ExpectWithOffset`.
+func ConsistentlyWithOffset(offset int, actual interface{}, intervals ...interface{}) AsyncAssertion {
 	if globalFailWrapper == nil {
 		panic(nilFailHandlerPanic)
 	}
@@ -276,59 +270,62 @@ func ConsistentlyWithOffset(offset int, actual interface{}, intervals ...interfa
 	return asyncassertion.New(asyncassertion.AsyncAssertionTypeConsistently, actual, globalFailWrapper, timeoutInterval, pollingInterval, offset)
 }
 
-//Set the default timeout duration for Eventually.  Eventually will repeatedly poll your condition until it succeeds, or until this timeout elapses.
+// SetDefaultEventuallyTimeout sets the default timeout duration for Eventually. Eventually will repeatedly poll your condition until it succeeds, or until this timeout elapses.
 func SetDefaultEventuallyTimeout(t time.Duration) {
 	defaultEventuallyTimeout = t
 }
 
-//Set the default polling interval for Eventually.
+// SetDefaultEventuallyPollingInterval sets the default polling interval for Eventually.
 func SetDefaultEventuallyPollingInterval(t time.Duration) {
 	defaultEventuallyPollingInterval = t
 }
 
-//Set the default duration for Consistently.  Consistently will verify that your condition is satsified for this long.
+// SetDefaultConsistentlyDuration sets  the default duration for Consistently. Consistently will verify that your condition is satsified for this long.
 func SetDefaultConsistentlyDuration(t time.Duration) {
 	defaultConsistentlyDuration = t
 }
 
-//Set the default polling interval for Consistently.
+// SetDefaultConsistentlyPollingInterval sets the default polling interval for Consistently.
 func SetDefaultConsistentlyPollingInterval(t time.Duration) {
 	defaultConsistentlyPollingInterval = t
 }
 
-//GomegaAsyncAssertion is returned by Eventually and Consistently and polls the actual value passed into Eventually against
-//the matcher passed to the Should and ShouldNot methods.
+// AsyncAssertion is returned by Eventually and Consistently and polls the actual value passed into Eventually against
+// the matcher passed to the Should and ShouldNot methods.
 //
-//Both Should and ShouldNot take a variadic optionalDescription argument.  This is passed on to
-//fmt.Sprintf() and is used to annotate failure messages.  This allows you to make your failure messages more
-//descriptive
+// Both Should and ShouldNot take a variadic optionalDescription argument.  This is passed on to
+// fmt.Sprintf() and is used to annotate failure messages.  This allows you to make your failure messages more
+// descriptive.
 //
-//Both Should and ShouldNot return a boolean that is true if the assertion passed and false if it failed.
+// Both Should and ShouldNot return a boolean that is true if the assertion passed and false if it failed.
 //
-//Example:
+// Example:
 //
-//  Eventually(myChannel).Should(Receive(), "Something should have come down the pipe.")
-//  Consistently(myChannel).ShouldNot(Receive(), "Nothing should have come down the pipe.")
-type GomegaAsyncAssertion interface {
+//   Eventually(myChannel).Should(Receive(), "Something should have come down the pipe.")
+//   Consistently(myChannel).ShouldNot(Receive(), "Nothing should have come down the pipe.")
+type AsyncAssertion interface {
 	Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
 	ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
 }
 
-//GomegaAssertion is returned by Ω and Expect and compares the actual value to the matcher
-//passed to the Should/ShouldNot and To/ToNot/NotTo methods.
+// GomegaAsyncAssertion is deprecated in favor of AsyncAssertion, which does not stutter.
+type GomegaAsyncAssertion = AsyncAssertion
+
+// Assertion is returned by Ω and Expect and compares the actual value to the matcher
+// passed to the Should/ShouldNot and To/ToNot/NotTo methods.
 //
-//Typically Should/ShouldNot are used with Ω and To/ToNot/NotTo are used with Expect
-//though this is not enforced.
+// Typically Should/ShouldNot are used with Ω and To/ToNot/NotTo are used with Expect
+// though this is not enforced.
 //
-//All methods take a variadic optionalDescription argument.  This is passed on to fmt.Sprintf()
-//and is used to annotate failure messages.
+// All methods take a variadic optionalDescription argument.  This is passed on to fmt.Sprintf()
+// and is used to annotate failure messages.
 //
-//All methods return a bool that is true if hte assertion passed and false if it failed.
+// All methods return a bool that is true if hte assertion passed and false if it failed.
 //
-//Example:
+// Example:
 //
-//   Ω(farm.HasCow()).Should(BeTrue(), "Farm %v should have a cow", farm)
-type GomegaAssertion interface {
+//    Ω(farm.HasCow()).Should(BeTrue(), "Farm %v should have a cow", farm)
+type Assertion interface {
 	Should(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
 	ShouldNot(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
 
@@ -337,39 +334,50 @@ type GomegaAssertion interface {
 	NotTo(matcher types.GomegaMatcher, optionalDescription ...interface{}) bool
 }
 
-//OmegaMatcher is deprecated in favor of the better-named and better-organized types.GomegaMatcher but sticks around to support existing code that uses it
+// GomegaAssertion is deprecated in favor of Assertion, which does not stutter.
+type GomegaAssertion = Assertion
+
+// OmegaMatcher is deprecated in favor of the better-named and better-organized types.GomegaMatcher but sticks around to support existing code that uses it
 type OmegaMatcher types.GomegaMatcher
 
-//GomegaWithT wraps a *testing.T and provides `Expect`, `Eventually`, and `Consistently` methods.  This allows you to leverage
-//Gomega's rich ecosystem of matchers in standard `testing` test suites.
+// WithT wraps a *testing.T and provides `Expect`, `Eventually`, and `Consistently` methods.  This allows you to leverage
+// Gomega's rich ecosystem of matchers in standard `testing` test suites.
 //
-//Use `NewGomegaWithT` to instantiate a `GomegaWithT`
-type GomegaWithT struct {
+// Use `NewWithT` to instantiate a `WithT`
+type WithT struct {
 	t types.GomegaTestingT
 }
 
-//NewGomegaWithT takes a *testing.T and returngs a `GomegaWithT` allowing you to use `Expect`, `Eventually`, and `Consistently` along with
-//Gomega's rich ecosystem of matchers in standard `testing` test suits.
+// GomegaWithT is deprecated in favor of gomega.WithT, which does not stutter.
+type GomegaWithT = WithT
+
+// NewWithT takes a *testing.T and returngs a `gomega.WithT` allowing you to use `Expect`, `Eventually`, and `Consistently` along with
+// Gomega's rich ecosystem of matchers in standard `testing` test suits.
 //
 //    func TestFarmHasCow(t *testing.T) {
-//        g := GomegaWithT(t)
+//        g := gomega.NewWithT(t)
 //
 //        f := farm.New([]string{"Cow", "Horse"})
 //        g.Expect(f.HasCow()).To(BeTrue(), "Farm should have cow")
 //     }
-func NewGomegaWithT(t types.GomegaTestingT) *GomegaWithT {
-	return &GomegaWithT{
+func NewWithT(t types.GomegaTestingT) *WithT {
+	return &WithT{
 		t: t,
 	}
 }
 
-//See documentation for Expect
-func (g *GomegaWithT) Expect(actual interface{}, extra ...interface{}) GomegaAssertion {
+// NewGomegaWithT is deprecated in favor of gomega.NewWithT, which does not stutter.
+func NewGomegaWithT(t types.GomegaTestingT) *GomegaWithT {
+	return NewWithT(t)
+}
+
+// Expect is used to make assertions. See documentation for Expect.
+func (g *WithT) Expect(actual interface{}, extra ...interface{}) Assertion {
 	return assertion.New(actual, testingtsupport.BuildTestingTGomegaFailWrapper(g.t), 0, extra...)
 }
 
-//See documentation for Eventually
-func (g *GomegaWithT) Eventually(actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// Eventually is used to make asynchronous assertions. See documentation for Eventually.
+func (g *WithT) Eventually(actual interface{}, intervals ...interface{}) AsyncAssertion {
 	timeoutInterval := defaultEventuallyTimeout
 	pollingInterval := defaultEventuallyPollingInterval
 	if len(intervals) > 0 {
@@ -381,8 +389,8 @@ func (g *GomegaWithT) Eventually(actual interface{}, intervals ...interface{}) G
 	return asyncassertion.New(asyncassertion.AsyncAssertionTypeEventually, actual, testingtsupport.BuildTestingTGomegaFailWrapper(g.t), timeoutInterval, pollingInterval, 0)
 }
 
-//See documentation for Consistently
-func (g *GomegaWithT) Consistently(actual interface{}, intervals ...interface{}) GomegaAsyncAssertion {
+// Consistently is used to make asynchronous assertions. See documentation for Consistently.
+func (g *WithT) Consistently(actual interface{}, intervals ...interface{}) AsyncAssertion {
 	timeoutInterval := defaultConsistentlyDuration
 	pollingInterval := defaultConsistentlyPollingInterval
 	if len(intervals) > 0 {
diff --git a/vendor/github.com/onsi/gomega/matchers/have_occurred_matcher.go b/vendor/github.com/onsi/gomega/matchers/have_occurred_matcher.go
index ebdd71786..bef00ae21 100644
--- a/vendor/github.com/onsi/gomega/matchers/have_occurred_matcher.go
+++ b/vendor/github.com/onsi/gomega/matchers/have_occurred_matcher.go
@@ -29,5 +29,5 @@ func (matcher *HaveOccurredMatcher) FailureMessage(actual interface{}) (message
 }
 
 func (matcher *HaveOccurredMatcher) NegatedFailureMessage(actual interface{}) (message string) {
-	return fmt.Sprintf("Expected error:\n%s\n%s\n%s", format.Object(actual, 1), format.IndentString(actual.(error).Error(), 1), "not to have occurred")
+	return fmt.Sprintf("Unexpected error:\n%s\n%s\n%s", format.Object(actual, 1), format.IndentString(actual.(error).Error(), 1), "occurred")
 }
diff --git a/vendor/github.com/onsi/gomega/matchers/match_xml_matcher.go b/vendor/github.com/onsi/gomega/matchers/match_xml_matcher.go
index 3b412ce81..5c815f5af 100644
--- a/vendor/github.com/onsi/gomega/matchers/match_xml_matcher.go
+++ b/vendor/github.com/onsi/gomega/matchers/match_xml_matcher.go
@@ -70,7 +70,7 @@ func parseXmlContent(content string) (*xmlNode, error) {
 			if err == io.EOF {
 				break
 			}
-			return nil, fmt.Errorf("failed to decode next token: %v", err)
+			return nil, fmt.Errorf("failed to decode next token: %v", err) // untested section
 		}
 
 		lastNodeIndex := len(allNodes) - 1
@@ -94,7 +94,7 @@ func parseXmlContent(content string) (*xmlNode, error) {
 		case xml.CharData:
 			lastNode.Content = append(lastNode.Content, tok.Copy()...)
 		case xml.Comment:
-			lastNode.Comments = append(lastNode.Comments, tok.Copy())
+			lastNode.Comments = append(lastNode.Comments, tok.Copy()) // untested section
 		case xml.ProcInst:
 			lastNode.ProcInsts = append(lastNode.ProcInsts, tok.Copy())
 		}
diff --git a/vendor/github.com/opencontainers/runtime-tools/generate/config.go b/vendor/github.com/opencontainers/runtime-tools/generate/config.go
index 164fdf141..f68bdde37 100644
--- a/vendor/github.com/opencontainers/runtime-tools/generate/config.go
+++ b/vendor/github.com/opencontainers/runtime-tools/generate/config.go
@@ -151,6 +151,13 @@ func (g *Generator) initConfigWindows() {
 	}
 }
 
+func (g *Generator) initConfigWindowsNetwork() {
+	g.initConfigWindows()
+	if g.Config.Windows.Network == nil {
+		g.Config.Windows.Network = &rspec.WindowsNetwork{}
+	}
+}
+
 func (g *Generator) initConfigWindowsHyperV() {
 	g.initConfigWindows()
 	if g.Config.Windows.HyperV == nil {
@@ -171,3 +178,31 @@ func (g *Generator) initConfigWindowsResourcesMemory() {
 		g.Config.Windows.Resources.Memory = &rspec.WindowsMemoryResources{}
 	}
 }
+
+func (g *Generator) initConfigVM() {
+	g.initConfig()
+	if g.Config.VM == nil {
+		g.Config.VM = &rspec.VM{}
+	}
+}
+
+func (g *Generator) initConfigVMHypervisor() {
+	g.initConfigVM()
+	if &g.Config.VM.Hypervisor == nil {
+		g.Config.VM.Hypervisor = rspec.VMHypervisor{}
+	}
+}
+
+func (g *Generator) initConfigVMKernel() {
+	g.initConfigVM()
+	if &g.Config.VM.Kernel == nil {
+		g.Config.VM.Kernel = rspec.VMKernel{}
+	}
+}
+
+func (g *Generator) initConfigVMImage() {
+	g.initConfigVM()
+	if &g.Config.VM.Image == nil {
+		g.Config.VM.Image = rspec.VMImage{}
+	}
+}
diff --git a/vendor/github.com/opencontainers/runtime-tools/generate/generate.go b/vendor/github.com/opencontainers/runtime-tools/generate/generate.go
index 1eb44770f..6d3268902 100644
--- a/vendor/github.com/opencontainers/runtime-tools/generate/generate.go
+++ b/vendor/github.com/opencontainers/runtime-tools/generate/generate.go
@@ -54,17 +54,8 @@ func New(os string) (generator Generator, err error) {
 				"cmd",
 			},
 			Cwd: `C:\`,
-			ConsoleSize: &rspec.Box{
-				Width:  80,
-				Height: 20,
-			},
-		}
-		config.Windows = &rspec.Windows{
-			IgnoreFlushesDuringBoot: true,
-			Network: &rspec.WindowsNetwork{
-				AllowUnqualifiedDNSQuery: true,
-			},
 		}
+		config.Windows = &rspec.Windows{}
 	} else {
 		config.Root = &rspec.Root{
 			Path:     "rootfs",
@@ -368,6 +359,12 @@ func (g *Generator) SetHostname(s string) {
 	g.Config.Hostname = s
 }
 
+// SetOCIVersion sets g.Config.Version.
+func (g *Generator) SetOCIVersion(s string) {
+	g.initConfig()
+	g.Config.Version = s
+}
+
 // ClearAnnotations clears g.Config.Annotations.
 func (g *Generator) ClearAnnotations() {
 	if g.Config == nil {
@@ -1074,6 +1071,69 @@ func (g *Generator) ClearProcessCapabilities() {
 	g.Config.Process.Capabilities.Ambient = []string{}
 }
 
+// AddProcessCapability adds a process capability into all 5 capability sets.
+func (g *Generator) AddProcessCapability(c string) error {
+	cp := strings.ToUpper(c)
+	if err := validate.CapValid(cp, g.HostSpecific); err != nil {
+		return err
+	}
+
+	g.initConfigProcessCapabilities()
+
+	var foundAmbient, foundBounding, foundEffective, foundInheritable, foundPermitted bool
+	for _, cap := range g.Config.Process.Capabilities.Ambient {
+		if strings.ToUpper(cap) == cp {
+			foundAmbient = true
+			break
+		}
+	}
+	if !foundAmbient {
+		g.Config.Process.Capabilities.Ambient = append(g.Config.Process.Capabilities.Ambient, cp)
+	}
+
+	for _, cap := range g.Config.Process.Capabilities.Bounding {
+		if strings.ToUpper(cap) == cp {
+			foundBounding = true
+			break
+		}
+	}
+	if !foundBounding {
+		g.Config.Process.Capabilities.Bounding = append(g.Config.Process.Capabilities.Bounding, cp)
+	}
+
+	for _, cap := range g.Config.Process.Capabilities.Effective {
+		if strings.ToUpper(cap) == cp {
+			foundEffective = true
+			break
+		}
+	}
+	if !foundEffective {
+		g.Config.Process.Capabilities.Effective = append(g.Config.Process.Capabilities.Effective, cp)
+	}
+
+	for _, cap := range g.Config.Process.Capabilities.Inheritable {
+		if strings.ToUpper(cap) == cp {
+			foundInheritable = true
+			break
+		}
+	}
+	if !foundInheritable {
+		g.Config.Process.Capabilities.Inheritable = append(g.Config.Process.Capabilities.Inheritable, cp)
+	}
+
+	for _, cap := range g.Config.Process.Capabilities.Permitted {
+		if strings.ToUpper(cap) == cp {
+			foundPermitted = true
+			break
+		}
+	}
+	if !foundPermitted {
+		g.Config.Process.Capabilities.Permitted = append(g.Config.Process.Capabilities.Permitted, cp)
+	}
+
+	return nil
+}
+
 // AddProcessCapabilityAmbient adds a process capability into g.Config.Process.Capabilities.Ambient.
 func (g *Generator) AddProcessCapabilityAmbient(c string) error {
 	cp := strings.ToUpper(c)
@@ -1190,6 +1250,42 @@ func (g *Generator) AddProcessCapabilityPermitted(c string) error {
 	return nil
 }
 
+// DropProcessCapability drops a process capability from all 5 capability sets.
+func (g *Generator) DropProcessCapability(c string) error {
+	if g.Config == nil || g.Config.Process == nil || g.Config.Process.Capabilities == nil {
+		return nil
+	}
+
+	cp := strings.ToUpper(c)
+	for i, cap := range g.Config.Process.Capabilities.Ambient {
+		if strings.ToUpper(cap) == cp {
+			g.Config.Process.Capabilities.Ambient = removeFunc(g.Config.Process.Capabilities.Ambient, i)
+		}
+	}
+	for i, cap := range g.Config.Process.Capabilities.Bounding {
+		if strings.ToUpper(cap) == cp {
+			g.Config.Process.Capabilities.Bounding = removeFunc(g.Config.Process.Capabilities.Bounding, i)
+		}
+	}
+	for i, cap := range g.Config.Process.Capabilities.Effective {
+		if strings.ToUpper(cap) == cp {
+			g.Config.Process.Capabilities.Effective = removeFunc(g.Config.Process.Capabilities.Effective, i)
+		}
+	}
+	for i, cap := range g.Config.Process.Capabilities.Inheritable {
+		if strings.ToUpper(cap) == cp {
+			g.Config.Process.Capabilities.Inheritable = removeFunc(g.Config.Process.Capabilities.Inheritable, i)
+		}
+	}
+	for i, cap := range g.Config.Process.Capabilities.Permitted {
+		if strings.ToUpper(cap) == cp {
+			g.Config.Process.Capabilities.Permitted = removeFunc(g.Config.Process.Capabilities.Permitted, i)
+		}
+	}
+
+	return validate.CapValid(cp, false)
+}
+
 // DropProcessCapabilityAmbient drops a process capability from g.Config.Process.Capabilities.Ambient.
 func (g *Generator) DropProcessCapabilityAmbient(c string) error {
 	if g.Config == nil || g.Config.Process == nil || g.Config.Process.Capabilities == nil {
@@ -1533,14 +1629,82 @@ func (g *Generator) SetSolarisMilestone(milestone string) {
 	g.Config.Solaris.Milestone = milestone
 }
 
+// SetVMHypervisorPath sets g.Config.VM.Hypervisor.Path
+func (g *Generator) SetVMHypervisorPath(path string) error {
+	if !strings.HasPrefix(path, "/") {
+		return fmt.Errorf("hypervisorPath %v is not an absolute path", path)
+	}
+	g.initConfigVMHypervisor()
+	g.Config.VM.Hypervisor.Path = path
+	return nil
+}
+
+// SetVMHypervisorParameters sets g.Config.VM.Hypervisor.Parameters
+func (g *Generator) SetVMHypervisorParameters(parameters []string) {
+	g.initConfigVMHypervisor()
+	g.Config.VM.Hypervisor.Parameters = parameters
+}
+
+// SetVMKernelPath sets g.Config.VM.Kernel.Path
+func (g *Generator) SetVMKernelPath(path string) error {
+	if !strings.HasPrefix(path, "/") {
+		return fmt.Errorf("kernelPath %v is not an absolute path", path)
+	}
+	g.initConfigVMKernel()
+	g.Config.VM.Kernel.Path = path
+	return nil
+}
+
+// SetVMKernelParameters sets g.Config.VM.Kernel.Parameters
+func (g *Generator) SetVMKernelParameters(parameters []string) {
+	g.initConfigVMKernel()
+	g.Config.VM.Kernel.Parameters = parameters
+}
+
+// SetVMKernelInitRD sets g.Config.VM.Kernel.InitRD
+func (g *Generator) SetVMKernelInitRD(initrd string) error {
+	if !strings.HasPrefix(initrd, "/") {
+		return fmt.Errorf("kernelInitrd %v is not an absolute path", initrd)
+	}
+	g.initConfigVMKernel()
+	g.Config.VM.Kernel.InitRD = initrd
+	return nil
+}
+
+// SetVMImagePath sets g.Config.VM.Image.Path
+func (g *Generator) SetVMImagePath(path string) error {
+	if !strings.HasPrefix(path, "/") {
+		return fmt.Errorf("imagePath %v is not an absolute path", path)
+	}
+	g.initConfigVMImage()
+	g.Config.VM.Image.Path = path
+	return nil
+}
+
+// SetVMImageFormat sets g.Config.VM.Image.Format
+func (g *Generator) SetVMImageFormat(format string) error {
+	switch format {
+	case "raw":
+	case "qcow2":
+	case "vdi":
+	case "vmdk":
+	case "vhd":
+	default:
+		return fmt.Errorf("Commonly supported formats are: raw, qcow2, vdi, vmdk, vhd")
+	}
+	g.initConfigVMImage()
+	g.Config.VM.Image.Format = format
+	return nil
+}
+
 // SetWindowsHypervUntilityVMPath sets g.Config.Windows.HyperV.UtilityVMPath.
 func (g *Generator) SetWindowsHypervUntilityVMPath(path string) {
 	g.initConfigWindowsHyperV()
 	g.Config.Windows.HyperV.UtilityVMPath = path
 }
 
-// SetWinodwsIgnoreFlushesDuringBoot sets g.Config.Winodws.IgnoreFlushesDuringBoot.
-func (g *Generator) SetWinodwsIgnoreFlushesDuringBoot(ignore bool) {
+// SetWindowsIgnoreFlushesDuringBoot sets g.Config.Windows.IgnoreFlushesDuringBoot.
+func (g *Generator) SetWindowsIgnoreFlushesDuringBoot(ignore bool) {
 	g.initConfigWindows()
 	g.Config.Windows.IgnoreFlushesDuringBoot = ignore
 }
@@ -1551,12 +1715,45 @@ func (g *Generator) AddWindowsLayerFolders(folder string) {
 	g.Config.Windows.LayerFolders = append(g.Config.Windows.LayerFolders, folder)
 }
 
+// AddWindowsDevices adds or sets g.Config.Windwos.Devices
+func (g *Generator) AddWindowsDevices(id, idType string) error {
+	if idType != "class" {
+		return fmt.Errorf("Invalid idType value: %s. Windows only supports a value of class", idType)
+	}
+	device := rspec.WindowsDevice{
+		ID:     id,
+		IDType: idType,
+	}
+
+	g.initConfigWindows()
+	for i, device := range g.Config.Windows.Devices {
+		if device.ID == id {
+			g.Config.Windows.Devices[i].IDType = idType
+			return nil
+		}
+	}
+	g.Config.Windows.Devices = append(g.Config.Windows.Devices, device)
+	return nil
+}
+
 // SetWindowsNetwork sets g.Config.Windows.Network.
 func (g *Generator) SetWindowsNetwork(network rspec.WindowsNetwork) {
 	g.initConfigWindows()
 	g.Config.Windows.Network = &network
 }
 
+// SetWindowsNetworkAllowUnqualifiedDNSQuery sets g.Config.Windows.Network.AllowUnqualifiedDNSQuery
+func (g *Generator) SetWindowsNetworkAllowUnqualifiedDNSQuery(setting bool) {
+	g.initConfigWindowsNetwork()
+	g.Config.Windows.Network.AllowUnqualifiedDNSQuery = setting
+}
+
+// SetWindowsNetworkNamespace sets g.Config.Windows.Network.NetworkNamespace
+func (g *Generator) SetWindowsNetworkNamespace(path string) {
+	g.initConfigWindowsNetwork()
+	g.Config.Windows.Network.NetworkNamespace = path
+}
+
 // SetWindowsResourcesCPU sets g.Config.Windows.Resources.CPU.
 func (g *Generator) SetWindowsResourcesCPU(cpu rspec.WindowsCPUResources) {
 	g.initConfigWindowsResources()
@@ -1575,8 +1772,8 @@ func (g *Generator) SetWindowsResourcesStorage(storage rspec.WindowsStorageResou
 	g.Config.Windows.Resources.Storage = &storage
 }
 
-// SetWinodwsServicing sets g.Config.Winodws.Servicing.
-func (g *Generator) SetWinodwsServicing(servicing bool) {
+// SetWindowsServicing sets g.Config.Windows.Servicing.
+func (g *Generator) SetWindowsServicing(servicing bool) {
 	g.initConfigWindows()
 	g.Config.Windows.Servicing = servicing
 }
diff --git a/vendor/github.com/opencontainers/runtime-tools/validate/validate_linux.go b/vendor/github.com/opencontainers/runtime-tools/validate/validate_linux.go
index 8d452c209..dcefafae7 100644
--- a/vendor/github.com/opencontainers/runtime-tools/validate/validate_linux.go
+++ b/vendor/github.com/opencontainers/runtime-tools/validate/validate_linux.go
@@ -16,6 +16,7 @@ import (
 	rspec "github.com/opencontainers/runtime-spec/specs-go"
 	osFilepath "github.com/opencontainers/runtime-tools/filepath"
 	"github.com/opencontainers/runtime-tools/specerror"
+	"github.com/opencontainers/selinux/go-selinux/label"
 	"github.com/sirupsen/logrus"
 )
 
@@ -226,5 +227,11 @@ func (v *Validator) CheckLinux() (errs error) {
 		}
 	}
 
+	if v.spec.Linux.MountLabel != "" {
+		if err := label.Validate(v.spec.Linux.MountLabel); err != nil {
+			errs = multierror.Append(errs, fmt.Errorf("mountLabel %v is invalid", v.spec.Linux.MountLabel))
+		}
+	}
+
 	return
 }
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/label/label.go b/vendor/github.com/opencontainers/selinux/go-selinux/label/label.go
index 4e9a8c54f..e178568fd 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/label/label.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/label/label.go
@@ -37,6 +37,14 @@ func SocketLabel() (string, error) {
 	return "", nil
 }
 
+func SetKeyLabel(processLabel string) error {
+	return nil
+}
+
+func KeyLabel() (string, error) {
+	return "", nil
+}
+
 func FileLabel(path string) (string, error) {
 	return "", nil
 }
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go b/vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go
index d4e26909d..1eb9a6bf2 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go
@@ -115,6 +115,17 @@ func SocketLabel() (string, error) {
 	return selinux.SocketLabel()
 }
 
+// SetKeyLabel takes a process label and tells the kernel to assign the
+// label to the next kernel keyring that gets created
+func SetKeyLabel(processLabel string) error {
+	return selinux.SetKeyLabel(processLabel)
+}
+
+// KeyLabel retrieves the current default kernel keyring label setting
+func KeyLabel() (string, error) {
+	return selinux.KeyLabel()
+}
+
 // ProcessLabel returns the process label that the kernel will assign
 // to the next program executed by the current process.  If "" is returned
 // this indicates that the default labeling will happen for the process.
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
index 5adafd317..d7786c33c 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
@@ -333,6 +333,11 @@ func writeCon(fpath string, val string) error {
 	if fpath == "" {
 		return ErrEmptyPath
 	}
+	if val == "" {
+		if !GetEnabled() {
+			return nil
+		}
+	}
 
 	out, err := os.OpenFile(fpath, os.O_WRONLY, 0)
 	if err != nil {
@@ -398,6 +403,24 @@ func SocketLabel() (string, error) {
 	return readCon(fmt.Sprintf("/proc/self/task/%d/attr/sockcreate", syscall.Gettid()))
 }
 
+// SetKeyLabel takes a process label and tells the kernel to assign the
+// label to the next kernel keyring that gets created
+func SetKeyLabel(label string) error {
+	err := writeCon("/proc/self/attr/keycreate", label)
+	if os.IsNotExist(err) {
+		return nil
+	}
+	if label == "" && os.IsPermission(err) && !GetEnabled() {
+		return nil
+	}
+	return err
+}
+
+// KeyLabel retrieves the current kernel keyring label setting
+func KeyLabel() (string, error) {
+	return readCon("/proc/self/attr/keycreate")
+}
+
 // Get returns the Context as a string
 func (c Context) Get() string {
 	if c["level"] != "" {
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go
index 9497acbd0..79b005d19 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go
@@ -109,6 +109,17 @@ func SocketLabel() (string, error) {
 	return "", nil
 }
 
+// SetKeyLabel takes a process label and tells the kernel to assign the
+// label to the next kernel keyring that gets created
+func SetKeyLabel(label string) error {
+	return nil
+}
+
+// KeyLabel retrieves the current kernel keyring label setting
+func KeyLabel() (string, error) {
+	return "", nil
+}
+
 // Get returns the Context as a string
 func (c Context) Get() string {
 	return ""
diff --git a/vendor/github.com/opentracing/opentracing-go/.travis.yml b/vendor/github.com/opentracing/opentracing-go/.travis.yml
index 9580e48d6..8d5b75e41 100644
--- a/vendor/github.com/opentracing/opentracing-go/.travis.yml
+++ b/vendor/github.com/opentracing/opentracing-go/.travis.yml
@@ -2,9 +2,8 @@ language: go
 
 matrix:
   include:
-  - go: "1.7.x"
-  - go: "1.8.x"
-  - go: "1.9.x"
+  - go: "1.11.x"
+  - go: "1.12.x"
   - go: "tip"
     env:
     - LINT=true
@@ -13,7 +12,6 @@ matrix:
 install:
   - if [ "$LINT" == true ]; then go get -u golang.org/x/lint/golint/... ; else echo 'skipping lint'; fi
   - go get -u github.com/stretchr/testify/...
-  - go get -u golang.org/x/net/context
 
 script:
   - make test
diff --git a/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md b/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md
index ecfb7e3b7..7c14febe1 100644
--- a/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md
+++ b/vendor/github.com/opentracing/opentracing-go/CHANGELOG.md
@@ -1,11 +1,43 @@
 Changes by Version
 ==================
 
-1.1.0 (unreleased)
+1.1.0 (2019-03-23)
 -------------------
 
-- Deprecate InitGlobalTracer() in favor of SetGlobalTracer()
+Notable changes:
+- The library is now released under Apache 2.0 license
+- Use Set() instead of Add() in HTTPHeadersCarrier is functionally a breaking change (fixes issue [#159](https://github.com/opentracing/opentracing-go/issues/159))
+- 'golang.org/x/net/context' is replaced with 'context' from the standard library
 
+List of all changes:
+
+- Export StartSpanFromContextWithTracer (#214) <Aaron Delaney>
+- Add IsGlobalTracerRegistered() to indicate if a tracer has been registered (#201) <Mike Goldsmith>
+- Use Set() instead of Add() in HTTPHeadersCarrier (#191) <jeremyxu2010>
+- Update license to Apache 2.0 (#181) <Andrea Kao>
+- Replace 'golang.org/x/net/context' with 'context' (#176) <Tony Ghita>
+- Port of Python opentracing/harness/api_check.py to Go (#146) <chris erway>
+- Fix race condition in MockSpan.Context() (#170) <Brad>
+- Add PeerHostIPv4.SetString() (#155)  <NeoCN>
+- Add a Noop log field type to log to allow for optional fields (#150)  <Matt Ho>
+
+
+1.0.2 (2017-04-26)
+-------------------
+
+- Add more semantic tags (#139) <Rustam Zagirov>
+
+
+1.0.1 (2017-02-06)
+-------------------
+
+- Correct spelling in comments <Ben Sigelman>
+- Address race in nextMockID() (#123) <bill fumerola>
+- log: avoid panic marshaling nil error (#131) <Anthony Voutas>
+- Deprecate InitGlobalTracer in favor of SetGlobalTracer (#128) <Yuri Shkuro>
+- Drop Go 1.5 that fails in Travis (#129) <Yuri Shkuro>
+- Add convenience methods Key() and Value() to log.Field <Ben Sigelman>
+- Add convenience methods to log.Field (2 years, 6 months ago) <Radu Berinde>
 
 1.0.0 (2016-09-26)
 -------------------
diff --git a/vendor/github.com/opentracing/opentracing-go/gocontext.go b/vendor/github.com/opentracing/opentracing-go/gocontext.go
index 05a62e70b..08c00c04e 100644
--- a/vendor/github.com/opentracing/opentracing-go/gocontext.go
+++ b/vendor/github.com/opentracing/opentracing-go/gocontext.go
@@ -41,11 +41,17 @@ func SpanFromContext(ctx context.Context) Span {
 //        ...
 //    }
 func StartSpanFromContext(ctx context.Context, operationName string, opts ...StartSpanOption) (Span, context.Context) {
-	return startSpanFromContextWithTracer(ctx, GlobalTracer(), operationName, opts...)
+	return StartSpanFromContextWithTracer(ctx, GlobalTracer(), operationName, opts...)
 }
 
-// startSpanFromContextWithTracer is factored out for testing purposes.
-func startSpanFromContextWithTracer(ctx context.Context, tracer Tracer, operationName string, opts ...StartSpanOption) (Span, context.Context) {
+// StartSpanFromContextWithTracer starts and returns a span with `operationName`
+// using  a span found within the context as a ChildOfRef. If that doesn't exist
+// it creates a root span. It also returns a context.Context object built
+// around the returned span.
+//
+// It's behavior is identical to StartSpanFromContext except that it takes an explicit
+// tracer as opposed to using the global tracer.
+func StartSpanFromContextWithTracer(ctx context.Context, tracer Tracer, operationName string, opts ...StartSpanOption) (Span, context.Context) {
 	if parentSpan := SpanFromContext(ctx); parentSpan != nil {
 		opts = append(opts, ChildOf(parentSpan.Context()))
 	}
diff --git a/vendor/github.com/opentracing/opentracing-go/tracer.go b/vendor/github.com/opentracing/opentracing-go/tracer.go
index 7bca1f736..715f0cedf 100644
--- a/vendor/github.com/opentracing/opentracing-go/tracer.go
+++ b/vendor/github.com/opentracing/opentracing-go/tracer.go
@@ -44,8 +44,7 @@ type Tracer interface {
 	// and each has an expected carrier type.
 	//
 	// Other packages may declare their own `format` values, much like the keys
-	// used by `context.Context` (see
-	// https://godoc.org/golang.org/x/net/context#WithValue).
+	// used by `context.Context` (see https://godoc.org/context#WithValue).
 	//
 	// Example usage (sans error handling):
 	//
diff --git a/vendor/github.com/pkg/profile/.travis.yml b/vendor/github.com/pkg/profile/.travis.yml
index 192c5c27f..1c9e6bb6b 100644
--- a/vendor/github.com/pkg/profile/.travis.yml
+++ b/vendor/github.com/pkg/profile/.travis.yml
@@ -1,9 +1,8 @@
 language: go
 go_import_path: github.com/pkg/profile
 go:
-  - 1.4.3
-  - 1.5.2
-  - 1.6.3
+  - 1.10.x
+  - 1.12.x
   - tip
 
 script:
diff --git a/vendor/github.com/pkg/profile/profile.go b/vendor/github.com/pkg/profile/profile.go
index c44913a4c..20e285427 100644
--- a/vendor/github.com/pkg/profile/profile.go
+++ b/vendor/github.com/pkg/profile/profile.go
@@ -19,6 +19,7 @@ const (
 	mutexMode
 	blockMode
 	traceMode
+	threadCreateMode
 )
 
 // Profile represents an active profiling session.
@@ -83,17 +84,20 @@ func MemProfileRate(rate int) func(*Profile) {
 
 // MutexProfile enables mutex profiling.
 // It disables any previous profiling settings.
-//
-// Mutex profiling is a no-op before go1.8.
 func MutexProfile(p *Profile) { p.mode = mutexMode }
 
 // BlockProfile enables block (contention) profiling.
 // It disables any previous profiling settings.
 func BlockProfile(p *Profile) { p.mode = blockMode }
 
-// Trace profile controls if execution tracing will be enabled. It disables any previous profiling settings.
+// Trace profile enables execution tracing.
+// It disables any previous profiling settings.
 func TraceProfile(p *Profile) { p.mode = traceMode }
 
+// ThreadcreationProfile enables thread creation profiling..
+// It disables any previous profiling settings.
+func ThreadcreationProfile(p *Profile) { p.mode = threadCreateMode }
+
 // ProfilePath controls the base path where various profiling
 // files are written. If blank, the base path will be generated
 // by ioutil.TempDir.
@@ -211,6 +215,21 @@ func Start(options ...func(*Profile)) interface {
 			logf("profile: block profiling disabled, %s", fn)
 		}
 
+	case threadCreateMode:
+		fn := filepath.Join(path, "threadcreation.pprof")
+		f, err := os.Create(fn)
+		if err != nil {
+			log.Fatalf("profile: could not create thread creation profile %q: %v", fn, err)
+		}
+		logf("profile: thread creation profiling enabled, %s", fn)
+		prof.closer = func() {
+			if mp := pprof.Lookup("threadcreate"); mp != nil {
+				mp.WriteTo(f, 0)
+			}
+			f.Close()
+			logf("profile: thread creation profiling disabled, %s", fn)
+		}
+
 	case traceMode:
 		fn := filepath.Join(path, "trace.out")
 		f, err := os.Create(fn)
diff --git a/vendor/github.com/prometheus/client_golang/LICENSE b/vendor/github.com/prometheus/client_golang/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/prometheus/client_golang/NOTICE b/vendor/github.com/prometheus/client_golang/NOTICE
new file mode 100644
index 000000000..dd878a30e
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/NOTICE
@@ -0,0 +1,23 @@
+Prometheus instrumentation library for Go applications
+Copyright 2012-2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
+
+
+The following components are included in this product:
+
+perks - a fork of https://github.com/bmizerany/perks
+https://github.com/beorn7/perks
+Copyright 2013-2015 Blake Mizerany, Björn Rabenstein
+See https://github.com/beorn7/perks/blob/master/README.md for license details.
+
+Go support for Protocol Buffers - Google's data interchange format
+http://github.com/golang/protobuf/
+Copyright 2010 The Go Authors
+See source code for license details.
+
+Support for streaming Protocol Buffer messages for the Go language (golang).
+https://github.com/matttproud/golang_protobuf_extensions
+Copyright 2013 Matt T. Proud
+Licensed under the Apache License, Version 2.0
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/.gitignore b/vendor/github.com/prometheus/client_golang/prometheus/.gitignore
new file mode 100644
index 000000000..3460f0346
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/.gitignore
@@ -0,0 +1 @@
+command-line-arguments.test
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/README.md b/vendor/github.com/prometheus/client_golang/prometheus/README.md
new file mode 100644
index 000000000..44986bff0
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/README.md
@@ -0,0 +1 @@
+See [![go-doc](https://godoc.org/github.com/prometheus/client_golang/prometheus?status.svg)](https://godoc.org/github.com/prometheus/client_golang/prometheus).
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go
new file mode 100644
index 000000000..288f0e854
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info.go
@@ -0,0 +1,29 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build go1.12
+
+package prometheus
+
+import "runtime/debug"
+
+// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go 1.12+.
+func readBuildInfo() (path, version, sum string) {
+	path, version, sum = "unknown", "unknown", "unknown"
+	if bi, ok := debug.ReadBuildInfo(); ok {
+		path = bi.Main.Path
+		version = bi.Main.Version
+		sum = bi.Main.Sum
+	}
+	return
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go
new file mode 100644
index 000000000..6609e2877
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/build_info_pre_1.12.go
@@ -0,0 +1,22 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !go1.12
+
+package prometheus
+
+// readBuildInfo is a wrapper around debug.ReadBuildInfo for Go versions before
+// 1.12. Remove this whole file once the minimum supported Go version is 1.12.
+func readBuildInfo() (path, version, sum string) {
+	return "unknown", "unknown", "unknown"
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/collector.go b/vendor/github.com/prometheus/client_golang/prometheus/collector.go
new file mode 100644
index 000000000..1e839650d
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/collector.go
@@ -0,0 +1,120 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+// Collector is the interface implemented by anything that can be used by
+// Prometheus to collect metrics. A Collector has to be registered for
+// collection. See Registerer.Register.
+//
+// The stock metrics provided by this package (Gauge, Counter, Summary,
+// Histogram, Untyped) are also Collectors (which only ever collect one metric,
+// namely itself). An implementer of Collector may, however, collect multiple
+// metrics in a coordinated fashion and/or create metrics on the fly. Examples
+// for collectors already implemented in this library are the metric vectors
+// (i.e. collection of multiple instances of the same Metric but with different
+// label values) like GaugeVec or SummaryVec, and the ExpvarCollector.
+type Collector interface {
+	// Describe sends the super-set of all possible descriptors of metrics
+	// collected by this Collector to the provided channel and returns once
+	// the last descriptor has been sent. The sent descriptors fulfill the
+	// consistency and uniqueness requirements described in the Desc
+	// documentation.
+	//
+	// It is valid if one and the same Collector sends duplicate
+	// descriptors. Those duplicates are simply ignored. However, two
+	// different Collectors must not send duplicate descriptors.
+	//
+	// Sending no descriptor at all marks the Collector as “unchecked”,
+	// i.e. no checks will be performed at registration time, and the
+	// Collector may yield any Metric it sees fit in its Collect method.
+	//
+	// This method idempotently sends the same descriptors throughout the
+	// lifetime of the Collector. It may be called concurrently and
+	// therefore must be implemented in a concurrency safe way.
+	//
+	// If a Collector encounters an error while executing this method, it
+	// must send an invalid descriptor (created with NewInvalidDesc) to
+	// signal the error to the registry.
+	Describe(chan<- *Desc)
+	// Collect is called by the Prometheus registry when collecting
+	// metrics. The implementation sends each collected metric via the
+	// provided channel and returns once the last metric has been sent. The
+	// descriptor of each sent metric is one of those returned by Describe
+	// (unless the Collector is unchecked, see above). Returned metrics that
+	// share the same descriptor must differ in their variable label
+	// values.
+	//
+	// This method may be called concurrently and must therefore be
+	// implemented in a concurrency safe way. Blocking occurs at the expense
+	// of total performance of rendering all registered metrics. Ideally,
+	// Collector implementations support concurrent readers.
+	Collect(chan<- Metric)
+}
+
+// DescribeByCollect is a helper to implement the Describe method of a custom
+// Collector. It collects the metrics from the provided Collector and sends
+// their descriptors to the provided channel.
+//
+// If a Collector collects the same metrics throughout its lifetime, its
+// Describe method can simply be implemented as:
+//
+//   func (c customCollector) Describe(ch chan<- *Desc) {
+//   	DescribeByCollect(c, ch)
+//   }
+//
+// However, this will not work if the metrics collected change dynamically over
+// the lifetime of the Collector in a way that their combined set of descriptors
+// changes as well. The shortcut implementation will then violate the contract
+// of the Describe method. If a Collector sometimes collects no metrics at all
+// (for example vectors like CounterVec, GaugeVec, etc., which only collect
+// metrics after a metric with a fully specified label set has been accessed),
+// it might even get registered as an unchecked Collector (cf. the Register
+// method of the Registerer interface). Hence, only use this shortcut
+// implementation of Describe if you are certain to fulfill the contract.
+//
+// The Collector example demonstrates a use of DescribeByCollect.
+func DescribeByCollect(c Collector, descs chan<- *Desc) {
+	metrics := make(chan Metric)
+	go func() {
+		c.Collect(metrics)
+		close(metrics)
+	}()
+	for m := range metrics {
+		descs <- m.Desc()
+	}
+}
+
+// selfCollector implements Collector for a single Metric so that the Metric
+// collects itself. Add it as an anonymous field to a struct that implements
+// Metric, and call init with the Metric itself as an argument.
+type selfCollector struct {
+	self Metric
+}
+
+// init provides the selfCollector with a reference to the metric it is supposed
+// to collect. It is usually called within the factory function to create a
+// metric. See example.
+func (c *selfCollector) init(self Metric) {
+	c.self = self
+}
+
+// Describe implements Collector.
+func (c *selfCollector) Describe(ch chan<- *Desc) {
+	ch <- c.self.Desc()
+}
+
+// Collect implements Collector.
+func (c *selfCollector) Collect(ch chan<- Metric) {
+	ch <- c.self
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/counter.go b/vendor/github.com/prometheus/client_golang/prometheus/counter.go
new file mode 100644
index 000000000..d463e36d3
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/counter.go
@@ -0,0 +1,277 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"errors"
+	"math"
+	"sync/atomic"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// Counter is a Metric that represents a single numerical value that only ever
+// goes up. That implies that it cannot be used to count items whose number can
+// also go down, e.g. the number of currently running goroutines. Those
+// "counters" are represented by Gauges.
+//
+// A Counter is typically used to count requests served, tasks completed, errors
+// occurred, etc.
+//
+// To create Counter instances, use NewCounter.
+type Counter interface {
+	Metric
+	Collector
+
+	// Inc increments the counter by 1. Use Add to increment it by arbitrary
+	// non-negative values.
+	Inc()
+	// Add adds the given value to the counter. It panics if the value is <
+	// 0.
+	Add(float64)
+}
+
+// CounterOpts is an alias for Opts. See there for doc comments.
+type CounterOpts Opts
+
+// NewCounter creates a new Counter based on the provided CounterOpts.
+//
+// The returned implementation tracks the counter value in two separate
+// variables, a float64 and a uint64. The latter is used to track calls of the
+// Inc method and calls of the Add method with a value that can be represented
+// as a uint64. This allows atomic increments of the counter with optimal
+// performance. (It is common to have an Inc call in very hot execution paths.)
+// Both internal tracking values are added up in the Write method. This has to
+// be taken into account when it comes to precision and overflow behavior.
+func NewCounter(opts CounterOpts) Counter {
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		nil,
+		opts.ConstLabels,
+	)
+	result := &counter{desc: desc, labelPairs: desc.constLabelPairs}
+	result.init(result) // Init self-collection.
+	return result
+}
+
+type counter struct {
+	// valBits contains the bits of the represented float64 value, while
+	// valInt stores values that are exact integers. Both have to go first
+	// in the struct to guarantee alignment for atomic operations.
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	valBits uint64
+	valInt  uint64
+
+	selfCollector
+	desc *Desc
+
+	labelPairs []*dto.LabelPair
+}
+
+func (c *counter) Desc() *Desc {
+	return c.desc
+}
+
+func (c *counter) Add(v float64) {
+	if v < 0 {
+		panic(errors.New("counter cannot decrease in value"))
+	}
+	ival := uint64(v)
+	if float64(ival) == v {
+		atomic.AddUint64(&c.valInt, ival)
+		return
+	}
+
+	for {
+		oldBits := atomic.LoadUint64(&c.valBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + v)
+		if atomic.CompareAndSwapUint64(&c.valBits, oldBits, newBits) {
+			return
+		}
+	}
+}
+
+func (c *counter) Inc() {
+	atomic.AddUint64(&c.valInt, 1)
+}
+
+func (c *counter) Write(out *dto.Metric) error {
+	fval := math.Float64frombits(atomic.LoadUint64(&c.valBits))
+	ival := atomic.LoadUint64(&c.valInt)
+	val := fval + float64(ival)
+
+	return populateMetric(CounterValue, val, c.labelPairs, out)
+}
+
+// CounterVec is a Collector that bundles a set of Counters that all share the
+// same Desc, but have different values for their variable labels. This is used
+// if you want to count the same thing partitioned by various dimensions
+// (e.g. number of HTTP requests, partitioned by response code and
+// method). Create instances with NewCounterVec.
+type CounterVec struct {
+	*metricVec
+}
+
+// NewCounterVec creates a new CounterVec based on the provided CounterOpts and
+// partitioned by the given label names.
+func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec {
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		labelNames,
+		opts.ConstLabels,
+	)
+	return &CounterVec{
+		metricVec: newMetricVec(desc, func(lvs ...string) Metric {
+			if len(lvs) != len(desc.variableLabels) {
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+			}
+			result := &counter{desc: desc, labelPairs: makeLabelPairs(desc, lvs)}
+			result.init(result) // Init self-collection.
+			return result
+		}),
+	}
+}
+
+// GetMetricWithLabelValues returns the Counter for the given slice of label
+// values (same order as the VariableLabels in Desc). If that combination of
+// label values is accessed for the first time, a new Counter is created.
+//
+// It is possible to call this method without using the returned Counter to only
+// create the new Counter but leave it at its starting value 0. See also the
+// SummaryVec example.
+//
+// Keeping the Counter for later use is possible (and should be considered if
+// performance is critical), but keep in mind that Reset, DeleteLabelValues and
+// Delete can be used to delete the Counter from the CounterVec. In that case,
+// the Counter will still exist, but it will not be exported anymore, even if a
+// Counter with the same label values is created later.
+//
+// An error is returned if the number of label values is not the same as the
+// number of VariableLabels in Desc (minus any curried labels).
+//
+// Note that for more than one label value, this method is prone to mistakes
+// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as
+// an alternative to avoid that type of mistake. For higher label numbers, the
+// latter has a much more readable (albeit more verbose) syntax, but it comes
+// with a performance overhead (for creating and processing the Labels map).
+// See also the GaugeVec example.
+func (v *CounterVec) GetMetricWithLabelValues(lvs ...string) (Counter, error) {
+	metric, err := v.metricVec.getMetricWithLabelValues(lvs...)
+	if metric != nil {
+		return metric.(Counter), err
+	}
+	return nil, err
+}
+
+// GetMetricWith returns the Counter for the given Labels map (the label names
+// must match those of the VariableLabels in Desc). If that label map is
+// accessed for the first time, a new Counter is created. Implications of
+// creating a Counter without using it and keeping the Counter for later use are
+// the same as for GetMetricWithLabelValues.
+//
+// An error is returned if the number and names of the Labels are inconsistent
+// with those of the VariableLabels in Desc (minus any curried labels).
+//
+// This method is used for the same purpose as
+// GetMetricWithLabelValues(...string). See there for pros and cons of the two
+// methods.
+func (v *CounterVec) GetMetricWith(labels Labels) (Counter, error) {
+	metric, err := v.metricVec.getMetricWith(labels)
+	if metric != nil {
+		return metric.(Counter), err
+	}
+	return nil, err
+}
+
+// WithLabelValues works as GetMetricWithLabelValues, but panics where
+// GetMetricWithLabelValues would have returned an error. Not returning an
+// error allows shortcuts like
+//     myVec.WithLabelValues("404", "GET").Add(42)
+func (v *CounterVec) WithLabelValues(lvs ...string) Counter {
+	c, err := v.GetMetricWithLabelValues(lvs...)
+	if err != nil {
+		panic(err)
+	}
+	return c
+}
+
+// With works as GetMetricWith, but panics where GetMetricWithLabels would have
+// returned an error. Not returning an error allows shortcuts like
+//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
+func (v *CounterVec) With(labels Labels) Counter {
+	c, err := v.GetMetricWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return c
+}
+
+// CurryWith returns a vector curried with the provided labels, i.e. the
+// returned vector has those labels pre-set for all labeled operations performed
+// on it. The cardinality of the curried vector is reduced accordingly. The
+// order of the remaining labels stays the same (just with the curried labels
+// taken out of the sequence – which is relevant for the
+// (GetMetric)WithLabelValues methods). It is possible to curry a curried
+// vector, but only with labels not yet used for currying before.
+//
+// The metrics contained in the CounterVec are shared between the curried and
+// uncurried vectors. They are just accessed differently. Curried and uncurried
+// vectors behave identically in terms of collection. Only one must be
+// registered with a given registry (usually the uncurried version). The Reset
+// method deletes all metrics, even if called on a curried vector.
+func (v *CounterVec) CurryWith(labels Labels) (*CounterVec, error) {
+	vec, err := v.curryWith(labels)
+	if vec != nil {
+		return &CounterVec{vec}, err
+	}
+	return nil, err
+}
+
+// MustCurryWith works as CurryWith but panics where CurryWith would have
+// returned an error.
+func (v *CounterVec) MustCurryWith(labels Labels) *CounterVec {
+	vec, err := v.CurryWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return vec
+}
+
+// CounterFunc is a Counter whose value is determined at collect time by calling a
+// provided function.
+//
+// To create CounterFunc instances, use NewCounterFunc.
+type CounterFunc interface {
+	Metric
+	Collector
+}
+
+// NewCounterFunc creates a new CounterFunc based on the provided
+// CounterOpts. The value reported is determined by calling the given function
+// from within the Write method. Take into account that metric collection may
+// happen concurrently. If that results in concurrent calls to Write, like in
+// the case where a CounterFunc is directly registered with Prometheus, the
+// provided function must be concurrency-safe. The function should also honor
+// the contract for a Counter (values only go up, not down), but compliance will
+// not be checked.
+func NewCounterFunc(opts CounterOpts, function func() float64) CounterFunc {
+	return newValueFunc(NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		nil,
+		opts.ConstLabels,
+	), CounterValue, function)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/desc.go b/vendor/github.com/prometheus/client_golang/prometheus/desc.go
new file mode 100644
index 000000000..1d034f871
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/desc.go
@@ -0,0 +1,184 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/prometheus/common/model"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// Desc is the descriptor used by every Prometheus Metric. It is essentially
+// the immutable meta-data of a Metric. The normal Metric implementations
+// included in this package manage their Desc under the hood. Users only have to
+// deal with Desc if they use advanced features like the ExpvarCollector or
+// custom Collectors and Metrics.
+//
+// Descriptors registered with the same registry have to fulfill certain
+// consistency and uniqueness criteria if they share the same fully-qualified
+// name: They must have the same help string and the same label names (aka label
+// dimensions) in each, constLabels and variableLabels, but they must differ in
+// the values of the constLabels.
+//
+// Descriptors that share the same fully-qualified names and the same label
+// values of their constLabels are considered equal.
+//
+// Use NewDesc to create new Desc instances.
+type Desc struct {
+	// fqName has been built from Namespace, Subsystem, and Name.
+	fqName string
+	// help provides some helpful information about this metric.
+	help string
+	// constLabelPairs contains precalculated DTO label pairs based on
+	// the constant labels.
+	constLabelPairs []*dto.LabelPair
+	// VariableLabels contains names of labels for which the metric
+	// maintains variable values.
+	variableLabels []string
+	// id is a hash of the values of the ConstLabels and fqName. This
+	// must be unique among all registered descriptors and can therefore be
+	// used as an identifier of the descriptor.
+	id uint64
+	// dimHash is a hash of the label names (preset and variable) and the
+	// Help string. Each Desc with the same fqName must have the same
+	// dimHash.
+	dimHash uint64
+	// err is an error that occurred during construction. It is reported on
+	// registration time.
+	err error
+}
+
+// NewDesc allocates and initializes a new Desc. Errors are recorded in the Desc
+// and will be reported on registration time. variableLabels and constLabels can
+// be nil if no such labels should be set. fqName must not be empty.
+//
+// variableLabels only contain the label names. Their label values are variable
+// and therefore not part of the Desc. (They are managed within the Metric.)
+//
+// For constLabels, the label values are constant. Therefore, they are fully
+// specified in the Desc. See the Collector example for a usage pattern.
+func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *Desc {
+	d := &Desc{
+		fqName:         fqName,
+		help:           help,
+		variableLabels: variableLabels,
+	}
+	if !model.IsValidMetricName(model.LabelValue(fqName)) {
+		d.err = fmt.Errorf("%q is not a valid metric name", fqName)
+		return d
+	}
+	// labelValues contains the label values of const labels (in order of
+	// their sorted label names) plus the fqName (at position 0).
+	labelValues := make([]string, 1, len(constLabels)+1)
+	labelValues[0] = fqName
+	labelNames := make([]string, 0, len(constLabels)+len(variableLabels))
+	labelNameSet := map[string]struct{}{}
+	// First add only the const label names and sort them...
+	for labelName := range constLabels {
+		if !checkLabelName(labelName) {
+			d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName)
+			return d
+		}
+		labelNames = append(labelNames, labelName)
+		labelNameSet[labelName] = struct{}{}
+	}
+	sort.Strings(labelNames)
+	// ... so that we can now add const label values in the order of their names.
+	for _, labelName := range labelNames {
+		labelValues = append(labelValues, constLabels[labelName])
+	}
+	// Validate the const label values. They can't have a wrong cardinality, so
+	// use in len(labelValues) as expectedNumberOfValues.
+	if err := validateLabelValues(labelValues, len(labelValues)); err != nil {
+		d.err = err
+		return d
+	}
+	// Now add the variable label names, but prefix them with something that
+	// cannot be in a regular label name. That prevents matching the label
+	// dimension with a different mix between preset and variable labels.
+	for _, labelName := range variableLabels {
+		if !checkLabelName(labelName) {
+			d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName)
+			return d
+		}
+		labelNames = append(labelNames, "$"+labelName)
+		labelNameSet[labelName] = struct{}{}
+	}
+	if len(labelNames) != len(labelNameSet) {
+		d.err = errors.New("duplicate label names")
+		return d
+	}
+
+	vh := hashNew()
+	for _, val := range labelValues {
+		vh = hashAdd(vh, val)
+		vh = hashAddByte(vh, separatorByte)
+	}
+	d.id = vh
+	// Sort labelNames so that order doesn't matter for the hash.
+	sort.Strings(labelNames)
+	// Now hash together (in this order) the help string and the sorted
+	// label names.
+	lh := hashNew()
+	lh = hashAdd(lh, help)
+	lh = hashAddByte(lh, separatorByte)
+	for _, labelName := range labelNames {
+		lh = hashAdd(lh, labelName)
+		lh = hashAddByte(lh, separatorByte)
+	}
+	d.dimHash = lh
+
+	d.constLabelPairs = make([]*dto.LabelPair, 0, len(constLabels))
+	for n, v := range constLabels {
+		d.constLabelPairs = append(d.constLabelPairs, &dto.LabelPair{
+			Name:  proto.String(n),
+			Value: proto.String(v),
+		})
+	}
+	sort.Sort(labelPairSorter(d.constLabelPairs))
+	return d
+}
+
+// NewInvalidDesc returns an invalid descriptor, i.e. a descriptor with the
+// provided error set. If a collector returning such a descriptor is registered,
+// registration will fail with the provided error. NewInvalidDesc can be used by
+// a Collector to signal inability to describe itself.
+func NewInvalidDesc(err error) *Desc {
+	return &Desc{
+		err: err,
+	}
+}
+
+func (d *Desc) String() string {
+	lpStrings := make([]string, 0, len(d.constLabelPairs))
+	for _, lp := range d.constLabelPairs {
+		lpStrings = append(
+			lpStrings,
+			fmt.Sprintf("%s=%q", lp.GetName(), lp.GetValue()),
+		)
+	}
+	return fmt.Sprintf(
+		"Desc{fqName: %q, help: %q, constLabels: {%s}, variableLabels: %v}",
+		d.fqName,
+		d.help,
+		strings.Join(lpStrings, ","),
+		d.variableLabels,
+	)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/doc.go b/vendor/github.com/prometheus/client_golang/prometheus/doc.go
new file mode 100644
index 000000000..01977de66
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/doc.go
@@ -0,0 +1,200 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package prometheus is the core instrumentation package. It provides metrics
+// primitives to instrument code for monitoring. It also offers a registry for
+// metrics. Sub-packages allow to expose the registered metrics via HTTP
+// (package promhttp) or push them to a Pushgateway (package push). There is
+// also a sub-package promauto, which provides metrics constructors with
+// automatic registration.
+//
+// All exported functions and methods are safe to be used concurrently unless
+// specified otherwise.
+//
+// A Basic Example
+//
+// As a starting point, a very basic usage example:
+//
+//    package main
+//
+//    import (
+//    	"log"
+//    	"net/http"
+//
+//    	"github.com/prometheus/client_golang/prometheus"
+//    	"github.com/prometheus/client_golang/prometheus/promhttp"
+//    )
+//
+//    var (
+//    	cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{
+//    		Name: "cpu_temperature_celsius",
+//    		Help: "Current temperature of the CPU.",
+//    	})
+//    	hdFailures = prometheus.NewCounterVec(
+//    		prometheus.CounterOpts{
+//    			Name: "hd_errors_total",
+//    			Help: "Number of hard-disk errors.",
+//    		},
+//    		[]string{"device"},
+//    	)
+//    )
+//
+//    func init() {
+//    	// Metrics have to be registered to be exposed:
+//    	prometheus.MustRegister(cpuTemp)
+//    	prometheus.MustRegister(hdFailures)
+//    }
+//
+//    func main() {
+//    	cpuTemp.Set(65.3)
+//    	hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc()
+//
+//    	// The Handler function provides a default handler to expose metrics
+//    	// via an HTTP server. "/metrics" is the usual endpoint for that.
+//    	http.Handle("/metrics", promhttp.Handler())
+//    	log.Fatal(http.ListenAndServe(":8080", nil))
+//    }
+//
+//
+// This is a complete program that exports two metrics, a Gauge and a Counter,
+// the latter with a label attached to turn it into a (one-dimensional) vector.
+//
+// Metrics
+//
+// The number of exported identifiers in this package might appear a bit
+// overwhelming. However, in addition to the basic plumbing shown in the example
+// above, you only need to understand the different metric types and their
+// vector versions for basic usage. Furthermore, if you are not concerned with
+// fine-grained control of when and how to register metrics with the registry,
+// have a look at the promauto package, which will effectively allow you to
+// ignore registration altogether in simple cases.
+//
+// Above, you have already touched the Counter and the Gauge. There are two more
+// advanced metric types: the Summary and Histogram. A more thorough description
+// of those four metric types can be found in the Prometheus docs:
+// https://prometheus.io/docs/concepts/metric_types/
+//
+// A fifth "type" of metric is Untyped. It behaves like a Gauge, but signals the
+// Prometheus server not to assume anything about its type.
+//
+// In addition to the fundamental metric types Gauge, Counter, Summary,
+// Histogram, and Untyped, a very important part of the Prometheus data model is
+// the partitioning of samples along dimensions called labels, which results in
+// metric vectors. The fundamental types are GaugeVec, CounterVec, SummaryVec,
+// HistogramVec, and UntypedVec.
+//
+// While only the fundamental metric types implement the Metric interface, both
+// the metrics and their vector versions implement the Collector interface. A
+// Collector manages the collection of a number of Metrics, but for convenience,
+// a Metric can also “collect itself”. Note that Gauge, Counter, Summary,
+// Histogram, and Untyped are interfaces themselves while GaugeVec, CounterVec,
+// SummaryVec, HistogramVec, and UntypedVec are not.
+//
+// To create instances of Metrics and their vector versions, you need a suitable
+// …Opts struct, i.e. GaugeOpts, CounterOpts, SummaryOpts, HistogramOpts, or
+// UntypedOpts.
+//
+// Custom Collectors and constant Metrics
+//
+// While you could create your own implementations of Metric, most likely you
+// will only ever implement the Collector interface on your own. At a first
+// glance, a custom Collector seems handy to bundle Metrics for common
+// registration (with the prime example of the different metric vectors above,
+// which bundle all the metrics of the same name but with different labels).
+//
+// There is a more involved use case, too: If you already have metrics
+// available, created outside of the Prometheus context, you don't need the
+// interface of the various Metric types. You essentially want to mirror the
+// existing numbers into Prometheus Metrics during collection. An own
+// implementation of the Collector interface is perfect for that. You can create
+// Metric instances “on the fly” using NewConstMetric, NewConstHistogram, and
+// NewConstSummary (and their respective Must… versions). That will happen in
+// the Collect method. The Describe method has to return separate Desc
+// instances, representative of the “throw-away” metrics to be created later.
+// NewDesc comes in handy to create those Desc instances. Alternatively, you
+// could return no Desc at all, which will mark the Collector “unchecked”.  No
+// checks are performed at registration time, but metric consistency will still
+// be ensured at scrape time, i.e. any inconsistencies will lead to scrape
+// errors. Thus, with unchecked Collectors, the responsibility to not collect
+// metrics that lead to inconsistencies in the total scrape result lies with the
+// implementer of the Collector. While this is not a desirable state, it is
+// sometimes necessary. The typical use case is a situation where the exact
+// metrics to be returned by a Collector cannot be predicted at registration
+// time, but the implementer has sufficient knowledge of the whole system to
+// guarantee metric consistency.
+//
+// The Collector example illustrates the use case. You can also look at the
+// source code of the processCollector (mirroring process metrics), the
+// goCollector (mirroring Go metrics), or the expvarCollector (mirroring expvar
+// metrics) as examples that are used in this package itself.
+//
+// If you just need to call a function to get a single float value to collect as
+// a metric, GaugeFunc, CounterFunc, or UntypedFunc might be interesting
+// shortcuts.
+//
+// Advanced Uses of the Registry
+//
+// While MustRegister is the by far most common way of registering a Collector,
+// sometimes you might want to handle the errors the registration might cause.
+// As suggested by the name, MustRegister panics if an error occurs. With the
+// Register function, the error is returned and can be handled.
+//
+// An error is returned if the registered Collector is incompatible or
+// inconsistent with already registered metrics. The registry aims for
+// consistency of the collected metrics according to the Prometheus data model.
+// Inconsistencies are ideally detected at registration time, not at collect
+// time. The former will usually be detected at start-up time of a program,
+// while the latter will only happen at scrape time, possibly not even on the
+// first scrape if the inconsistency only becomes relevant later. That is the
+// main reason why a Collector and a Metric have to describe themselves to the
+// registry.
+//
+// So far, everything we did operated on the so-called default registry, as it
+// can be found in the global DefaultRegisterer variable. With NewRegistry, you
+// can create a custom registry, or you can even implement the Registerer or
+// Gatherer interfaces yourself. The methods Register and Unregister work in the
+// same way on a custom registry as the global functions Register and Unregister
+// on the default registry.
+//
+// There are a number of uses for custom registries: You can use registries with
+// special properties, see NewPedanticRegistry. You can avoid global state, as
+// it is imposed by the DefaultRegisterer. You can use multiple registries at
+// the same time to expose different metrics in different ways.  You can use
+// separate registries for testing purposes.
+//
+// Also note that the DefaultRegisterer comes registered with a Collector for Go
+// runtime metrics (via NewGoCollector) and a Collector for process metrics (via
+// NewProcessCollector). With a custom registry, you are in control and decide
+// yourself about the Collectors to register.
+//
+// HTTP Exposition
+//
+// The Registry implements the Gatherer interface. The caller of the Gather
+// method can then expose the gathered metrics in some way. Usually, the metrics
+// are served via HTTP on the /metrics endpoint. That's happening in the example
+// above. The tools to expose metrics via HTTP are in the promhttp sub-package.
+//
+// Pushing to the Pushgateway
+//
+// Function for pushing to the Pushgateway can be found in the push sub-package.
+//
+// Graphite Bridge
+//
+// Functions and examples to push metrics from a Gatherer to Graphite can be
+// found in the graphite sub-package.
+//
+// Other Means of Exposition
+//
+// More ways of exposing metrics can easily be added by following the approaches
+// of the existing implementations.
+package prometheus
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go
new file mode 100644
index 000000000..18a99d5fa
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go
@@ -0,0 +1,119 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"encoding/json"
+	"expvar"
+)
+
+type expvarCollector struct {
+	exports map[string]*Desc
+}
+
+// NewExpvarCollector returns a newly allocated expvar Collector that still has
+// to be registered with a Prometheus registry.
+//
+// An expvar Collector collects metrics from the expvar interface. It provides a
+// quick way to expose numeric values that are already exported via expvar as
+// Prometheus metrics. Note that the data models of expvar and Prometheus are
+// fundamentally different, and that the expvar Collector is inherently slower
+// than native Prometheus metrics. Thus, the expvar Collector is probably great
+// for experiments and prototying, but you should seriously consider a more
+// direct implementation of Prometheus metrics for monitoring production
+// systems.
+//
+// The exports map has the following meaning:
+//
+// The keys in the map correspond to expvar keys, i.e. for every expvar key you
+// want to export as Prometheus metric, you need an entry in the exports
+// map. The descriptor mapped to each key describes how to export the expvar
+// value. It defines the name and the help string of the Prometheus metric
+// proxying the expvar value. The type will always be Untyped.
+//
+// For descriptors without variable labels, the expvar value must be a number or
+// a bool. The number is then directly exported as the Prometheus sample
+// value. (For a bool, 'false' translates to 0 and 'true' to 1). Expvar values
+// that are not numbers or bools are silently ignored.
+//
+// If the descriptor has one variable label, the expvar value must be an expvar
+// map. The keys in the expvar map become the various values of the one
+// Prometheus label. The values in the expvar map must be numbers or bools again
+// as above.
+//
+// For descriptors with more than one variable label, the expvar must be a
+// nested expvar map, i.e. where the values of the topmost map are maps again
+// etc. until a depth is reached that corresponds to the number of labels. The
+// leaves of that structure must be numbers or bools as above to serve as the
+// sample values.
+//
+// Anything that does not fit into the scheme above is silently ignored.
+func NewExpvarCollector(exports map[string]*Desc) Collector {
+	return &expvarCollector{
+		exports: exports,
+	}
+}
+
+// Describe implements Collector.
+func (e *expvarCollector) Describe(ch chan<- *Desc) {
+	for _, desc := range e.exports {
+		ch <- desc
+	}
+}
+
+// Collect implements Collector.
+func (e *expvarCollector) Collect(ch chan<- Metric) {
+	for name, desc := range e.exports {
+		var m Metric
+		expVar := expvar.Get(name)
+		if expVar == nil {
+			continue
+		}
+		var v interface{}
+		labels := make([]string, len(desc.variableLabels))
+		if err := json.Unmarshal([]byte(expVar.String()), &v); err != nil {
+			ch <- NewInvalidMetric(desc, err)
+			continue
+		}
+		var processValue func(v interface{}, i int)
+		processValue = func(v interface{}, i int) {
+			if i >= len(labels) {
+				copiedLabels := append(make([]string, 0, len(labels)), labels...)
+				switch v := v.(type) {
+				case float64:
+					m = MustNewConstMetric(desc, UntypedValue, v, copiedLabels...)
+				case bool:
+					if v {
+						m = MustNewConstMetric(desc, UntypedValue, 1, copiedLabels...)
+					} else {
+						m = MustNewConstMetric(desc, UntypedValue, 0, copiedLabels...)
+					}
+				default:
+					return
+				}
+				ch <- m
+				return
+			}
+			vm, ok := v.(map[string]interface{})
+			if !ok {
+				return
+			}
+			for lv, val := range vm {
+				labels[i] = lv
+				processValue(val, i+1)
+			}
+		}
+		processValue(v, 0)
+	}
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/fnv.go b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go
new file mode 100644
index 000000000..3d383a735
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/fnv.go
@@ -0,0 +1,42 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+// Inline and byte-free variant of hash/fnv's fnv64a.
+
+const (
+	offset64 = 14695981039346656037
+	prime64  = 1099511628211
+)
+
+// hashNew initializies a new fnv64a hash value.
+func hashNew() uint64 {
+	return offset64
+}
+
+// hashAdd adds a string to a fnv64a hash value, returning the updated hash.
+func hashAdd(h uint64, s string) uint64 {
+	for i := 0; i < len(s); i++ {
+		h ^= uint64(s[i])
+		h *= prime64
+	}
+	return h
+}
+
+// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash.
+func hashAddByte(h uint64, b byte) uint64 {
+	h ^= uint64(b)
+	h *= prime64
+	return h
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/gauge.go b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go
new file mode 100644
index 000000000..71d406bd9
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/gauge.go
@@ -0,0 +1,286 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"math"
+	"sync/atomic"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// Gauge is a Metric that represents a single numerical value that can
+// arbitrarily go up and down.
+//
+// A Gauge is typically used for measured values like temperatures or current
+// memory usage, but also "counts" that can go up and down, like the number of
+// running goroutines.
+//
+// To create Gauge instances, use NewGauge.
+type Gauge interface {
+	Metric
+	Collector
+
+	// Set sets the Gauge to an arbitrary value.
+	Set(float64)
+	// Inc increments the Gauge by 1. Use Add to increment it by arbitrary
+	// values.
+	Inc()
+	// Dec decrements the Gauge by 1. Use Sub to decrement it by arbitrary
+	// values.
+	Dec()
+	// Add adds the given value to the Gauge. (The value can be negative,
+	// resulting in a decrease of the Gauge.)
+	Add(float64)
+	// Sub subtracts the given value from the Gauge. (The value can be
+	// negative, resulting in an increase of the Gauge.)
+	Sub(float64)
+
+	// SetToCurrentTime sets the Gauge to the current Unix time in seconds.
+	SetToCurrentTime()
+}
+
+// GaugeOpts is an alias for Opts. See there for doc comments.
+type GaugeOpts Opts
+
+// NewGauge creates a new Gauge based on the provided GaugeOpts.
+//
+// The returned implementation is optimized for a fast Set method. If you have a
+// choice for managing the value of a Gauge via Set vs. Inc/Dec/Add/Sub, pick
+// the former. For example, the Inc method of the returned Gauge is slower than
+// the Inc method of a Counter returned by NewCounter. This matches the typical
+// scenarios for Gauges and Counters, where the former tends to be Set-heavy and
+// the latter Inc-heavy.
+func NewGauge(opts GaugeOpts) Gauge {
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		nil,
+		opts.ConstLabels,
+	)
+	result := &gauge{desc: desc, labelPairs: desc.constLabelPairs}
+	result.init(result) // Init self-collection.
+	return result
+}
+
+type gauge struct {
+	// valBits contains the bits of the represented float64 value. It has
+	// to go first in the struct to guarantee alignment for atomic
+	// operations.  http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	valBits uint64
+
+	selfCollector
+
+	desc       *Desc
+	labelPairs []*dto.LabelPair
+}
+
+func (g *gauge) Desc() *Desc {
+	return g.desc
+}
+
+func (g *gauge) Set(val float64) {
+	atomic.StoreUint64(&g.valBits, math.Float64bits(val))
+}
+
+func (g *gauge) SetToCurrentTime() {
+	g.Set(float64(time.Now().UnixNano()) / 1e9)
+}
+
+func (g *gauge) Inc() {
+	g.Add(1)
+}
+
+func (g *gauge) Dec() {
+	g.Add(-1)
+}
+
+func (g *gauge) Add(val float64) {
+	for {
+		oldBits := atomic.LoadUint64(&g.valBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + val)
+		if atomic.CompareAndSwapUint64(&g.valBits, oldBits, newBits) {
+			return
+		}
+	}
+}
+
+func (g *gauge) Sub(val float64) {
+	g.Add(val * -1)
+}
+
+func (g *gauge) Write(out *dto.Metric) error {
+	val := math.Float64frombits(atomic.LoadUint64(&g.valBits))
+	return populateMetric(GaugeValue, val, g.labelPairs, out)
+}
+
+// GaugeVec is a Collector that bundles a set of Gauges that all share the same
+// Desc, but have different values for their variable labels. This is used if
+// you want to count the same thing partitioned by various dimensions
+// (e.g. number of operations queued, partitioned by user and operation
+// type). Create instances with NewGaugeVec.
+type GaugeVec struct {
+	*metricVec
+}
+
+// NewGaugeVec creates a new GaugeVec based on the provided GaugeOpts and
+// partitioned by the given label names.
+func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec {
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		labelNames,
+		opts.ConstLabels,
+	)
+	return &GaugeVec{
+		metricVec: newMetricVec(desc, func(lvs ...string) Metric {
+			if len(lvs) != len(desc.variableLabels) {
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+			}
+			result := &gauge{desc: desc, labelPairs: makeLabelPairs(desc, lvs)}
+			result.init(result) // Init self-collection.
+			return result
+		}),
+	}
+}
+
+// GetMetricWithLabelValues returns the Gauge for the given slice of label
+// values (same order as the VariableLabels in Desc). If that combination of
+// label values is accessed for the first time, a new Gauge is created.
+//
+// It is possible to call this method without using the returned Gauge to only
+// create the new Gauge but leave it at its starting value 0. See also the
+// SummaryVec example.
+//
+// Keeping the Gauge for later use is possible (and should be considered if
+// performance is critical), but keep in mind that Reset, DeleteLabelValues and
+// Delete can be used to delete the Gauge from the GaugeVec. In that case, the
+// Gauge will still exist, but it will not be exported anymore, even if a
+// Gauge with the same label values is created later. See also the CounterVec
+// example.
+//
+// An error is returned if the number of label values is not the same as the
+// number of VariableLabels in Desc (minus any curried labels).
+//
+// Note that for more than one label value, this method is prone to mistakes
+// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as
+// an alternative to avoid that type of mistake. For higher label numbers, the
+// latter has a much more readable (albeit more verbose) syntax, but it comes
+// with a performance overhead (for creating and processing the Labels map).
+func (v *GaugeVec) GetMetricWithLabelValues(lvs ...string) (Gauge, error) {
+	metric, err := v.metricVec.getMetricWithLabelValues(lvs...)
+	if metric != nil {
+		return metric.(Gauge), err
+	}
+	return nil, err
+}
+
+// GetMetricWith returns the Gauge for the given Labels map (the label names
+// must match those of the VariableLabels in Desc). If that label map is
+// accessed for the first time, a new Gauge is created. Implications of
+// creating a Gauge without using it and keeping the Gauge for later use are
+// the same as for GetMetricWithLabelValues.
+//
+// An error is returned if the number and names of the Labels are inconsistent
+// with those of the VariableLabels in Desc (minus any curried labels).
+//
+// This method is used for the same purpose as
+// GetMetricWithLabelValues(...string). See there for pros and cons of the two
+// methods.
+func (v *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) {
+	metric, err := v.metricVec.getMetricWith(labels)
+	if metric != nil {
+		return metric.(Gauge), err
+	}
+	return nil, err
+}
+
+// WithLabelValues works as GetMetricWithLabelValues, but panics where
+// GetMetricWithLabelValues would have returned an error. Not returning an
+// error allows shortcuts like
+//     myVec.WithLabelValues("404", "GET").Add(42)
+func (v *GaugeVec) WithLabelValues(lvs ...string) Gauge {
+	g, err := v.GetMetricWithLabelValues(lvs...)
+	if err != nil {
+		panic(err)
+	}
+	return g
+}
+
+// With works as GetMetricWith, but panics where GetMetricWithLabels would have
+// returned an error. Not returning an error allows shortcuts like
+//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
+func (v *GaugeVec) With(labels Labels) Gauge {
+	g, err := v.GetMetricWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return g
+}
+
+// CurryWith returns a vector curried with the provided labels, i.e. the
+// returned vector has those labels pre-set for all labeled operations performed
+// on it. The cardinality of the curried vector is reduced accordingly. The
+// order of the remaining labels stays the same (just with the curried labels
+// taken out of the sequence – which is relevant for the
+// (GetMetric)WithLabelValues methods). It is possible to curry a curried
+// vector, but only with labels not yet used for currying before.
+//
+// The metrics contained in the GaugeVec are shared between the curried and
+// uncurried vectors. They are just accessed differently. Curried and uncurried
+// vectors behave identically in terms of collection. Only one must be
+// registered with a given registry (usually the uncurried version). The Reset
+// method deletes all metrics, even if called on a curried vector.
+func (v *GaugeVec) CurryWith(labels Labels) (*GaugeVec, error) {
+	vec, err := v.curryWith(labels)
+	if vec != nil {
+		return &GaugeVec{vec}, err
+	}
+	return nil, err
+}
+
+// MustCurryWith works as CurryWith but panics where CurryWith would have
+// returned an error.
+func (v *GaugeVec) MustCurryWith(labels Labels) *GaugeVec {
+	vec, err := v.CurryWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return vec
+}
+
+// GaugeFunc is a Gauge whose value is determined at collect time by calling a
+// provided function.
+//
+// To create GaugeFunc instances, use NewGaugeFunc.
+type GaugeFunc interface {
+	Metric
+	Collector
+}
+
+// NewGaugeFunc creates a new GaugeFunc based on the provided GaugeOpts. The
+// value reported is determined by calling the given function from within the
+// Write method. Take into account that metric collection may happen
+// concurrently. If that results in concurrent calls to Write, like in the case
+// where a GaugeFunc is directly registered with Prometheus, the provided
+// function must be concurrency-safe.
+func NewGaugeFunc(opts GaugeOpts, function func() float64) GaugeFunc {
+	return newValueFunc(NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		nil,
+		opts.ConstLabels,
+	), GaugeValue, function)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go
new file mode 100644
index 000000000..dc9247fed
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/go_collector.go
@@ -0,0 +1,396 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"runtime"
+	"runtime/debug"
+	"sync"
+	"time"
+)
+
+type goCollector struct {
+	goroutinesDesc *Desc
+	threadsDesc    *Desc
+	gcDesc         *Desc
+	goInfoDesc     *Desc
+
+	// ms... are memstats related.
+	msLast          *runtime.MemStats // Previously collected memstats.
+	msLastTimestamp time.Time
+	msMtx           sync.Mutex // Protects msLast and msLastTimestamp.
+	msMetrics       memStatsMetrics
+	msRead          func(*runtime.MemStats) // For mocking in tests.
+	msMaxWait       time.Duration           // Wait time for fresh memstats.
+	msMaxAge        time.Duration           // Maximum allowed age of old memstats.
+}
+
+// NewGoCollector returns a collector that exports metrics about the current Go
+// process. This includes memory stats. To collect those, runtime.ReadMemStats
+// is called. This requires to “stop the world”, which usually only happens for
+// garbage collection (GC). Take the following implications into account when
+// deciding whether to use the Go collector:
+//
+// 1. The performance impact of stopping the world is the more relevant the more
+// frequently metrics are collected. However, with Go1.9 or later the
+// stop-the-world time per metrics collection is very short (~25µs) so that the
+// performance impact will only matter in rare cases. However, with older Go
+// versions, the stop-the-world duration depends on the heap size and can be
+// quite significant (~1.7 ms/GiB as per
+// https://go-review.googlesource.com/c/go/+/34937).
+//
+// 2. During an ongoing GC, nothing else can stop the world. Therefore, if the
+// metrics collection happens to coincide with GC, it will only complete after
+// GC has finished. Usually, GC is fast enough to not cause problems. However,
+// with a very large heap, GC might take multiple seconds, which is enough to
+// cause scrape timeouts in common setups. To avoid this problem, the Go
+// collector will use the memstats from a previous collection if
+// runtime.ReadMemStats takes more than 1s. However, if there are no previously
+// collected memstats, or their collection is more than 5m ago, the collection
+// will block until runtime.ReadMemStats succeeds. (The problem might be solved
+// in Go1.13, see https://github.com/golang/go/issues/19812 for the related Go
+// issue.)
+func NewGoCollector() Collector {
+	return &goCollector{
+		goroutinesDesc: NewDesc(
+			"go_goroutines",
+			"Number of goroutines that currently exist.",
+			nil, nil),
+		threadsDesc: NewDesc(
+			"go_threads",
+			"Number of OS threads created.",
+			nil, nil),
+		gcDesc: NewDesc(
+			"go_gc_duration_seconds",
+			"A summary of the GC invocation durations.",
+			nil, nil),
+		goInfoDesc: NewDesc(
+			"go_info",
+			"Information about the Go environment.",
+			nil, Labels{"version": runtime.Version()}),
+		msLast:    &runtime.MemStats{},
+		msRead:    runtime.ReadMemStats,
+		msMaxWait: time.Second,
+		msMaxAge:  5 * time.Minute,
+		msMetrics: memStatsMetrics{
+			{
+				desc: NewDesc(
+					memstatNamespace("alloc_bytes"),
+					"Number of bytes allocated and still in use.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.Alloc) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("alloc_bytes_total"),
+					"Total number of bytes allocated, even if freed.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.TotalAlloc) },
+				valType: CounterValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("sys_bytes"),
+					"Number of bytes obtained from system.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.Sys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("lookups_total"),
+					"Total number of pointer lookups.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.Lookups) },
+				valType: CounterValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("mallocs_total"),
+					"Total number of mallocs.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.Mallocs) },
+				valType: CounterValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("frees_total"),
+					"Total number of frees.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.Frees) },
+				valType: CounterValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_alloc_bytes"),
+					"Number of heap bytes allocated and still in use.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapAlloc) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_sys_bytes"),
+					"Number of heap bytes obtained from system.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_idle_bytes"),
+					"Number of heap bytes waiting to be used.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapIdle) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_inuse_bytes"),
+					"Number of heap bytes that are in use.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapInuse) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_released_bytes"),
+					"Number of heap bytes released to OS.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapReleased) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("heap_objects"),
+					"Number of allocated objects.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.HeapObjects) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("stack_inuse_bytes"),
+					"Number of bytes in use by the stack allocator.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.StackInuse) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("stack_sys_bytes"),
+					"Number of bytes obtained from system for stack allocator.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.StackSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("mspan_inuse_bytes"),
+					"Number of bytes in use by mspan structures.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.MSpanInuse) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("mspan_sys_bytes"),
+					"Number of bytes used for mspan structures obtained from system.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.MSpanSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("mcache_inuse_bytes"),
+					"Number of bytes in use by mcache structures.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.MCacheInuse) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("mcache_sys_bytes"),
+					"Number of bytes used for mcache structures obtained from system.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.MCacheSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("buck_hash_sys_bytes"),
+					"Number of bytes used by the profiling bucket hash table.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.BuckHashSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("gc_sys_bytes"),
+					"Number of bytes used for garbage collection system metadata.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.GCSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("other_sys_bytes"),
+					"Number of bytes used for other system allocations.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.OtherSys) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("next_gc_bytes"),
+					"Number of heap bytes when next garbage collection will take place.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.NextGC) },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("last_gc_time_seconds"),
+					"Number of seconds since 1970 of last garbage collection.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return float64(ms.LastGC) / 1e9 },
+				valType: GaugeValue,
+			}, {
+				desc: NewDesc(
+					memstatNamespace("gc_cpu_fraction"),
+					"The fraction of this program's available CPU time used by the GC since the program started.",
+					nil, nil,
+				),
+				eval:    func(ms *runtime.MemStats) float64 { return ms.GCCPUFraction },
+				valType: GaugeValue,
+			},
+		},
+	}
+}
+
+func memstatNamespace(s string) string {
+	return "go_memstats_" + s
+}
+
+// Describe returns all descriptions of the collector.
+func (c *goCollector) Describe(ch chan<- *Desc) {
+	ch <- c.goroutinesDesc
+	ch <- c.threadsDesc
+	ch <- c.gcDesc
+	ch <- c.goInfoDesc
+	for _, i := range c.msMetrics {
+		ch <- i.desc
+	}
+}
+
+// Collect returns the current state of all metrics of the collector.
+func (c *goCollector) Collect(ch chan<- Metric) {
+	var (
+		ms   = &runtime.MemStats{}
+		done = make(chan struct{})
+	)
+	// Start reading memstats first as it might take a while.
+	go func() {
+		c.msRead(ms)
+		c.msMtx.Lock()
+		c.msLast = ms
+		c.msLastTimestamp = time.Now()
+		c.msMtx.Unlock()
+		close(done)
+	}()
+
+	ch <- MustNewConstMetric(c.goroutinesDesc, GaugeValue, float64(runtime.NumGoroutine()))
+	n, _ := runtime.ThreadCreateProfile(nil)
+	ch <- MustNewConstMetric(c.threadsDesc, GaugeValue, float64(n))
+
+	var stats debug.GCStats
+	stats.PauseQuantiles = make([]time.Duration, 5)
+	debug.ReadGCStats(&stats)
+
+	quantiles := make(map[float64]float64)
+	for idx, pq := range stats.PauseQuantiles[1:] {
+		quantiles[float64(idx+1)/float64(len(stats.PauseQuantiles)-1)] = pq.Seconds()
+	}
+	quantiles[0.0] = stats.PauseQuantiles[0].Seconds()
+	ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), stats.PauseTotal.Seconds(), quantiles)
+
+	ch <- MustNewConstMetric(c.goInfoDesc, GaugeValue, 1)
+
+	timer := time.NewTimer(c.msMaxWait)
+	select {
+	case <-done: // Our own ReadMemStats succeeded in time. Use it.
+		timer.Stop() // Important for high collection frequencies to not pile up timers.
+		c.msCollect(ch, ms)
+		return
+	case <-timer.C: // Time out, use last memstats if possible. Continue below.
+	}
+	c.msMtx.Lock()
+	if time.Since(c.msLastTimestamp) < c.msMaxAge {
+		// Last memstats are recent enough. Collect from them under the lock.
+		c.msCollect(ch, c.msLast)
+		c.msMtx.Unlock()
+		return
+	}
+	// If we are here, the last memstats are too old or don't exist. We have
+	// to wait until our own ReadMemStats finally completes. For that to
+	// happen, we have to release the lock.
+	c.msMtx.Unlock()
+	<-done
+	c.msCollect(ch, ms)
+}
+
+func (c *goCollector) msCollect(ch chan<- Metric, ms *runtime.MemStats) {
+	for _, i := range c.msMetrics {
+		ch <- MustNewConstMetric(i.desc, i.valType, i.eval(ms))
+	}
+}
+
+// memStatsMetrics provide description, value, and value type for memstat metrics.
+type memStatsMetrics []struct {
+	desc    *Desc
+	eval    func(*runtime.MemStats) float64
+	valType ValueType
+}
+
+// NewBuildInfoCollector returns a collector collecting a single metric
+// "go_build_info" with the constant value 1 and three labels "path", "version",
+// and "checksum". Their label values contain the main module path, version, and
+// checksum, respectively. The labels will only have meaningful values if the
+// binary is built with Go module support and from source code retrieved from
+// the source repository (rather than the local file system). This is usually
+// accomplished by building from outside of GOPATH, specifying the full address
+// of the main package, e.g. "GO111MODULE=on go run
+// github.com/prometheus/client_golang/examples/random". If built without Go
+// module support, all label values will be "unknown". If built with Go module
+// support but using the source code from the local file system, the "path" will
+// be set appropriately, but "checksum" will be empty and "version" will be
+// "(devel)".
+//
+// This collector uses only the build information for the main module. See
+// https://github.com/povilasv/prommod for an example of a collector for the
+// module dependencies.
+func NewBuildInfoCollector() Collector {
+	path, version, sum := readBuildInfo()
+	c := &selfCollector{MustNewConstMetric(
+		NewDesc(
+			"go_build_info",
+			"Build information about the main Go module.",
+			nil, Labels{"path": path, "version": version, "checksum": sum},
+		),
+		GaugeValue, 1)}
+	c.init(c.self)
+	return c
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
new file mode 100644
index 000000000..d7ea67bd2
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
@@ -0,0 +1,586 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"fmt"
+	"math"
+	"runtime"
+	"sort"
+	"sync"
+	"sync/atomic"
+
+	"github.com/golang/protobuf/proto"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// A Histogram counts individual observations from an event or sample stream in
+// configurable buckets. Similar to a summary, it also provides a sum of
+// observations and an observation count.
+//
+// On the Prometheus server, quantiles can be calculated from a Histogram using
+// the histogram_quantile function in the query language.
+//
+// Note that Histograms, in contrast to Summaries, can be aggregated with the
+// Prometheus query language (see the documentation for detailed
+// procedures). However, Histograms require the user to pre-define suitable
+// buckets, and they are in general less accurate. The Observe method of a
+// Histogram has a very low performance overhead in comparison with the Observe
+// method of a Summary.
+//
+// To create Histogram instances, use NewHistogram.
+type Histogram interface {
+	Metric
+	Collector
+
+	// Observe adds a single observation to the histogram.
+	Observe(float64)
+}
+
+// bucketLabel is used for the label that defines the upper bound of a
+// bucket of a histogram ("le" -> "less or equal").
+const bucketLabel = "le"
+
+// DefBuckets are the default Histogram buckets. The default buckets are
+// tailored to broadly measure the response time (in seconds) of a network
+// service. Most likely, however, you will be required to define buckets
+// customized to your use case.
+var (
+	DefBuckets = []float64{.005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10}
+
+	errBucketLabelNotAllowed = fmt.Errorf(
+		"%q is not allowed as label name in histograms", bucketLabel,
+	)
+)
+
+// LinearBuckets creates 'count' buckets, each 'width' wide, where the lowest
+// bucket has an upper bound of 'start'. The final +Inf bucket is not counted
+// and not included in the returned slice. The returned slice is meant to be
+// used for the Buckets field of HistogramOpts.
+//
+// The function panics if 'count' is zero or negative.
+func LinearBuckets(start, width float64, count int) []float64 {
+	if count < 1 {
+		panic("LinearBuckets needs a positive count")
+	}
+	buckets := make([]float64, count)
+	for i := range buckets {
+		buckets[i] = start
+		start += width
+	}
+	return buckets
+}
+
+// ExponentialBuckets creates 'count' buckets, where the lowest bucket has an
+// upper bound of 'start' and each following bucket's upper bound is 'factor'
+// times the previous bucket's upper bound. The final +Inf bucket is not counted
+// and not included in the returned slice. The returned slice is meant to be
+// used for the Buckets field of HistogramOpts.
+//
+// The function panics if 'count' is 0 or negative, if 'start' is 0 or negative,
+// or if 'factor' is less than or equal 1.
+func ExponentialBuckets(start, factor float64, count int) []float64 {
+	if count < 1 {
+		panic("ExponentialBuckets needs a positive count")
+	}
+	if start <= 0 {
+		panic("ExponentialBuckets needs a positive start value")
+	}
+	if factor <= 1 {
+		panic("ExponentialBuckets needs a factor greater than 1")
+	}
+	buckets := make([]float64, count)
+	for i := range buckets {
+		buckets[i] = start
+		start *= factor
+	}
+	return buckets
+}
+
+// HistogramOpts bundles the options for creating a Histogram metric. It is
+// mandatory to set Name to a non-empty string. All other fields are optional
+// and can safely be left at their zero value, although it is strongly
+// encouraged to set a Help string.
+type HistogramOpts struct {
+	// Namespace, Subsystem, and Name are components of the fully-qualified
+	// name of the Histogram (created by joining these components with
+	// "_"). Only Name is mandatory, the others merely help structuring the
+	// name. Note that the fully-qualified name of the Histogram must be a
+	// valid Prometheus metric name.
+	Namespace string
+	Subsystem string
+	Name      string
+
+	// Help provides information about this Histogram.
+	//
+	// Metrics with the same fully-qualified name must have the same Help
+	// string.
+	Help string
+
+	// ConstLabels are used to attach fixed labels to this metric. Metrics
+	// with the same fully-qualified name must have the same label names in
+	// their ConstLabels.
+	//
+	// ConstLabels are only used rarely. In particular, do not use them to
+	// attach the same labels to all your metrics. Those use cases are
+	// better covered by target labels set by the scraping Prometheus
+	// server, or by one specific metric (e.g. a build_info or a
+	// machine_role metric). See also
+	// https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels
+	ConstLabels Labels
+
+	// Buckets defines the buckets into which observations are counted. Each
+	// element in the slice is the upper inclusive bound of a bucket. The
+	// values must be sorted in strictly increasing order. There is no need
+	// to add a highest bucket with +Inf bound, it will be added
+	// implicitly. The default value is DefBuckets.
+	Buckets []float64
+}
+
+// NewHistogram creates a new Histogram based on the provided HistogramOpts. It
+// panics if the buckets in HistogramOpts are not in strictly increasing order.
+func NewHistogram(opts HistogramOpts) Histogram {
+	return newHistogram(
+		NewDesc(
+			BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+			opts.Help,
+			nil,
+			opts.ConstLabels,
+		),
+		opts,
+	)
+}
+
+func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogram {
+	if len(desc.variableLabels) != len(labelValues) {
+		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues))
+	}
+
+	for _, n := range desc.variableLabels {
+		if n == bucketLabel {
+			panic(errBucketLabelNotAllowed)
+		}
+	}
+	for _, lp := range desc.constLabelPairs {
+		if lp.GetName() == bucketLabel {
+			panic(errBucketLabelNotAllowed)
+		}
+	}
+
+	if len(opts.Buckets) == 0 {
+		opts.Buckets = DefBuckets
+	}
+
+	h := &histogram{
+		desc:        desc,
+		upperBounds: opts.Buckets,
+		labelPairs:  makeLabelPairs(desc, labelValues),
+		counts:      [2]*histogramCounts{&histogramCounts{}, &histogramCounts{}},
+	}
+	for i, upperBound := range h.upperBounds {
+		if i < len(h.upperBounds)-1 {
+			if upperBound >= h.upperBounds[i+1] {
+				panic(fmt.Errorf(
+					"histogram buckets must be in increasing order: %f >= %f",
+					upperBound, h.upperBounds[i+1],
+				))
+			}
+		} else {
+			if math.IsInf(upperBound, +1) {
+				// The +Inf bucket is implicit. Remove it here.
+				h.upperBounds = h.upperBounds[:i]
+			}
+		}
+	}
+	// Finally we know the final length of h.upperBounds and can make buckets
+	// for both counts:
+	h.counts[0].buckets = make([]uint64, len(h.upperBounds))
+	h.counts[1].buckets = make([]uint64, len(h.upperBounds))
+
+	h.init(h) // Init self-collection.
+	return h
+}
+
+type histogramCounts struct {
+	// sumBits contains the bits of the float64 representing the sum of all
+	// observations. sumBits and count have to go first in the struct to
+	// guarantee alignment for atomic operations.
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	sumBits uint64
+	count   uint64
+	buckets []uint64
+}
+
+type histogram struct {
+	// countAndHotIdx enables lock-free writes with use of atomic updates.
+	// The most significant bit is the hot index [0 or 1] of the count field
+	// below. Observe calls update the hot one. All remaining bits count the
+	// number of Observe calls. Observe starts by incrementing this counter,
+	// and finish by incrementing the count field in the respective
+	// histogramCounts, as a marker for completion.
+	//
+	// Calls of the Write method (which are non-mutating reads from the
+	// perspective of the histogram) swap the hot–cold under the writeMtx
+	// lock. A cooldown is awaited (while locked) by comparing the number of
+	// observations with the initiation count. Once they match, then the
+	// last observation on the now cool one has completed. All cool fields must
+	// be merged into the new hot before releasing writeMtx.
+	//
+	// Fields with atomic access first! See alignment constraint:
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	countAndHotIdx uint64
+
+	selfCollector
+	desc     *Desc
+	writeMtx sync.Mutex // Only used in the Write method.
+
+	// Two counts, one is "hot" for lock-free observations, the other is
+	// "cold" for writing out a dto.Metric. It has to be an array of
+	// pointers to guarantee 64bit alignment of the histogramCounts, see
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG.
+	counts [2]*histogramCounts
+
+	upperBounds []float64
+	labelPairs  []*dto.LabelPair
+}
+
+func (h *histogram) Desc() *Desc {
+	return h.desc
+}
+
+func (h *histogram) Observe(v float64) {
+	// TODO(beorn7): For small numbers of buckets (<30), a linear search is
+	// slightly faster than the binary search. If we really care, we could
+	// switch from one search strategy to the other depending on the number
+	// of buckets.
+	//
+	// Microbenchmarks (BenchmarkHistogramNoLabels):
+	// 11 buckets: 38.3 ns/op linear - binary 48.7 ns/op
+	// 100 buckets: 78.1 ns/op linear - binary 54.9 ns/op
+	// 300 buckets: 154 ns/op linear - binary 61.6 ns/op
+	i := sort.SearchFloat64s(h.upperBounds, v)
+
+	// We increment h.countAndHotIdx so that the counter in the lower
+	// 63 bits gets incremented. At the same time, we get the new value
+	// back, which we can use to find the currently-hot counts.
+	n := atomic.AddUint64(&h.countAndHotIdx, 1)
+	hotCounts := h.counts[n>>63]
+
+	if i < len(h.upperBounds) {
+		atomic.AddUint64(&hotCounts.buckets[i], 1)
+	}
+	for {
+		oldBits := atomic.LoadUint64(&hotCounts.sumBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + v)
+		if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) {
+			break
+		}
+	}
+	// Increment count last as we take it as a signal that the observation
+	// is complete.
+	atomic.AddUint64(&hotCounts.count, 1)
+}
+
+func (h *histogram) Write(out *dto.Metric) error {
+	// For simplicity, we protect this whole method by a mutex. It is not in
+	// the hot path, i.e. Observe is called much more often than Write. The
+	// complication of making Write lock-free isn't worth it, if possible at
+	// all.
+	h.writeMtx.Lock()
+	defer h.writeMtx.Unlock()
+
+	// Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0)
+	// without touching the count bits. See the struct comments for a full
+	// description of the algorithm.
+	n := atomic.AddUint64(&h.countAndHotIdx, 1<<63)
+	// count is contained unchanged in the lower 63 bits.
+	count := n & ((1 << 63) - 1)
+	// The most significant bit tells us which counts is hot. The complement
+	// is thus the cold one.
+	hotCounts := h.counts[n>>63]
+	coldCounts := h.counts[(^n)>>63]
+
+	// Await cooldown.
+	for count != atomic.LoadUint64(&coldCounts.count) {
+		runtime.Gosched() // Let observations get work done.
+	}
+
+	his := &dto.Histogram{
+		Bucket:      make([]*dto.Bucket, len(h.upperBounds)),
+		SampleCount: proto.Uint64(count),
+		SampleSum:   proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))),
+	}
+	var cumCount uint64
+	for i, upperBound := range h.upperBounds {
+		cumCount += atomic.LoadUint64(&coldCounts.buckets[i])
+		his.Bucket[i] = &dto.Bucket{
+			CumulativeCount: proto.Uint64(cumCount),
+			UpperBound:      proto.Float64(upperBound),
+		}
+	}
+
+	out.Histogram = his
+	out.Label = h.labelPairs
+
+	// Finally add all the cold counts to the new hot counts and reset the cold counts.
+	atomic.AddUint64(&hotCounts.count, count)
+	atomic.StoreUint64(&coldCounts.count, 0)
+	for {
+		oldBits := atomic.LoadUint64(&hotCounts.sumBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + his.GetSampleSum())
+		if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) {
+			atomic.StoreUint64(&coldCounts.sumBits, 0)
+			break
+		}
+	}
+	for i := range h.upperBounds {
+		atomic.AddUint64(&hotCounts.buckets[i], atomic.LoadUint64(&coldCounts.buckets[i]))
+		atomic.StoreUint64(&coldCounts.buckets[i], 0)
+	}
+	return nil
+}
+
+// HistogramVec is a Collector that bundles a set of Histograms that all share the
+// same Desc, but have different values for their variable labels. This is used
+// if you want to count the same thing partitioned by various dimensions
+// (e.g. HTTP request latencies, partitioned by status code and method). Create
+// instances with NewHistogramVec.
+type HistogramVec struct {
+	*metricVec
+}
+
+// NewHistogramVec creates a new HistogramVec based on the provided HistogramOpts and
+// partitioned by the given label names.
+func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec {
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		labelNames,
+		opts.ConstLabels,
+	)
+	return &HistogramVec{
+		metricVec: newMetricVec(desc, func(lvs ...string) Metric {
+			return newHistogram(desc, opts, lvs...)
+		}),
+	}
+}
+
+// GetMetricWithLabelValues returns the Histogram for the given slice of label
+// values (same order as the VariableLabels in Desc). If that combination of
+// label values is accessed for the first time, a new Histogram is created.
+//
+// It is possible to call this method without using the returned Histogram to only
+// create the new Histogram but leave it at its starting value, a Histogram without
+// any observations.
+//
+// Keeping the Histogram for later use is possible (and should be considered if
+// performance is critical), but keep in mind that Reset, DeleteLabelValues and
+// Delete can be used to delete the Histogram from the HistogramVec. In that case, the
+// Histogram will still exist, but it will not be exported anymore, even if a
+// Histogram with the same label values is created later. See also the CounterVec
+// example.
+//
+// An error is returned if the number of label values is not the same as the
+// number of VariableLabels in Desc (minus any curried labels).
+//
+// Note that for more than one label value, this method is prone to mistakes
+// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as
+// an alternative to avoid that type of mistake. For higher label numbers, the
+// latter has a much more readable (albeit more verbose) syntax, but it comes
+// with a performance overhead (for creating and processing the Labels map).
+// See also the GaugeVec example.
+func (v *HistogramVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) {
+	metric, err := v.metricVec.getMetricWithLabelValues(lvs...)
+	if metric != nil {
+		return metric.(Observer), err
+	}
+	return nil, err
+}
+
+// GetMetricWith returns the Histogram for the given Labels map (the label names
+// must match those of the VariableLabels in Desc). If that label map is
+// accessed for the first time, a new Histogram is created. Implications of
+// creating a Histogram without using it and keeping the Histogram for later use
+// are the same as for GetMetricWithLabelValues.
+//
+// An error is returned if the number and names of the Labels are inconsistent
+// with those of the VariableLabels in Desc (minus any curried labels).
+//
+// This method is used for the same purpose as
+// GetMetricWithLabelValues(...string). See there for pros and cons of the two
+// methods.
+func (v *HistogramVec) GetMetricWith(labels Labels) (Observer, error) {
+	metric, err := v.metricVec.getMetricWith(labels)
+	if metric != nil {
+		return metric.(Observer), err
+	}
+	return nil, err
+}
+
+// WithLabelValues works as GetMetricWithLabelValues, but panics where
+// GetMetricWithLabelValues would have returned an error. Not returning an
+// error allows shortcuts like
+//     myVec.WithLabelValues("404", "GET").Observe(42.21)
+func (v *HistogramVec) WithLabelValues(lvs ...string) Observer {
+	h, err := v.GetMetricWithLabelValues(lvs...)
+	if err != nil {
+		panic(err)
+	}
+	return h
+}
+
+// With works as GetMetricWith but panics where GetMetricWithLabels would have
+// returned an error. Not returning an error allows shortcuts like
+//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21)
+func (v *HistogramVec) With(labels Labels) Observer {
+	h, err := v.GetMetricWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return h
+}
+
+// CurryWith returns a vector curried with the provided labels, i.e. the
+// returned vector has those labels pre-set for all labeled operations performed
+// on it. The cardinality of the curried vector is reduced accordingly. The
+// order of the remaining labels stays the same (just with the curried labels
+// taken out of the sequence – which is relevant for the
+// (GetMetric)WithLabelValues methods). It is possible to curry a curried
+// vector, but only with labels not yet used for currying before.
+//
+// The metrics contained in the HistogramVec are shared between the curried and
+// uncurried vectors. They are just accessed differently. Curried and uncurried
+// vectors behave identically in terms of collection. Only one must be
+// registered with a given registry (usually the uncurried version). The Reset
+// method deletes all metrics, even if called on a curried vector.
+func (v *HistogramVec) CurryWith(labels Labels) (ObserverVec, error) {
+	vec, err := v.curryWith(labels)
+	if vec != nil {
+		return &HistogramVec{vec}, err
+	}
+	return nil, err
+}
+
+// MustCurryWith works as CurryWith but panics where CurryWith would have
+// returned an error.
+func (v *HistogramVec) MustCurryWith(labels Labels) ObserverVec {
+	vec, err := v.CurryWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return vec
+}
+
+type constHistogram struct {
+	desc       *Desc
+	count      uint64
+	sum        float64
+	buckets    map[float64]uint64
+	labelPairs []*dto.LabelPair
+}
+
+func (h *constHistogram) Desc() *Desc {
+	return h.desc
+}
+
+func (h *constHistogram) Write(out *dto.Metric) error {
+	his := &dto.Histogram{}
+	buckets := make([]*dto.Bucket, 0, len(h.buckets))
+
+	his.SampleCount = proto.Uint64(h.count)
+	his.SampleSum = proto.Float64(h.sum)
+
+	for upperBound, count := range h.buckets {
+		buckets = append(buckets, &dto.Bucket{
+			CumulativeCount: proto.Uint64(count),
+			UpperBound:      proto.Float64(upperBound),
+		})
+	}
+
+	if len(buckets) > 0 {
+		sort.Sort(buckSort(buckets))
+	}
+	his.Bucket = buckets
+
+	out.Histogram = his
+	out.Label = h.labelPairs
+
+	return nil
+}
+
+// NewConstHistogram returns a metric representing a Prometheus histogram with
+// fixed values for the count, sum, and bucket counts. As those parameters
+// cannot be changed, the returned value does not implement the Histogram
+// interface (but only the Metric interface). Users of this package will not
+// have much use for it in regular operations. However, when implementing custom
+// Collectors, it is useful as a throw-away metric that is generated on the fly
+// to send it to Prometheus in the Collect method.
+//
+// buckets is a map of upper bounds to cumulative counts, excluding the +Inf
+// bucket.
+//
+// NewConstHistogram returns an error if the length of labelValues is not
+// consistent with the variable labels in Desc or if Desc is invalid.
+func NewConstHistogram(
+	desc *Desc,
+	count uint64,
+	sum float64,
+	buckets map[float64]uint64,
+	labelValues ...string,
+) (Metric, error) {
+	if desc.err != nil {
+		return nil, desc.err
+	}
+	if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil {
+		return nil, err
+	}
+	return &constHistogram{
+		desc:       desc,
+		count:      count,
+		sum:        sum,
+		buckets:    buckets,
+		labelPairs: makeLabelPairs(desc, labelValues),
+	}, nil
+}
+
+// MustNewConstHistogram is a version of NewConstHistogram that panics where
+// NewConstMetric would have returned an error.
+func MustNewConstHistogram(
+	desc *Desc,
+	count uint64,
+	sum float64,
+	buckets map[float64]uint64,
+	labelValues ...string,
+) Metric {
+	m, err := NewConstHistogram(desc, count, sum, buckets, labelValues...)
+	if err != nil {
+		panic(err)
+	}
+	return m
+}
+
+type buckSort []*dto.Bucket
+
+func (s buckSort) Len() int {
+	return len(s)
+}
+
+func (s buckSort) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s buckSort) Less(i, j int) bool {
+	return s[i].GetUpperBound() < s[j].GetUpperBound()
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go
new file mode 100644
index 000000000..351c26e1a
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/internal/metric.go
@@ -0,0 +1,85 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal
+
+import (
+	"sort"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// metricSorter is a sortable slice of *dto.Metric.
+type metricSorter []*dto.Metric
+
+func (s metricSorter) Len() int {
+	return len(s)
+}
+
+func (s metricSorter) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s metricSorter) Less(i, j int) bool {
+	if len(s[i].Label) != len(s[j].Label) {
+		// This should not happen. The metrics are
+		// inconsistent. However, we have to deal with the fact, as
+		// people might use custom collectors or metric family injection
+		// to create inconsistent metrics. So let's simply compare the
+		// number of labels in this case. That will still yield
+		// reproducible sorting.
+		return len(s[i].Label) < len(s[j].Label)
+	}
+	for n, lp := range s[i].Label {
+		vi := lp.GetValue()
+		vj := s[j].Label[n].GetValue()
+		if vi != vj {
+			return vi < vj
+		}
+	}
+
+	// We should never arrive here. Multiple metrics with the same
+	// label set in the same scrape will lead to undefined ingestion
+	// behavior. However, as above, we have to provide stable sorting
+	// here, even for inconsistent metrics. So sort equal metrics
+	// by their timestamp, with missing timestamps (implying "now")
+	// coming last.
+	if s[i].TimestampMs == nil {
+		return false
+	}
+	if s[j].TimestampMs == nil {
+		return true
+	}
+	return s[i].GetTimestampMs() < s[j].GetTimestampMs()
+}
+
+// NormalizeMetricFamilies returns a MetricFamily slice with empty
+// MetricFamilies pruned and the remaining MetricFamilies sorted by name within
+// the slice, with the contained Metrics sorted within each MetricFamily.
+func NormalizeMetricFamilies(metricFamiliesByName map[string]*dto.MetricFamily) []*dto.MetricFamily {
+	for _, mf := range metricFamiliesByName {
+		sort.Sort(metricSorter(mf.Metric))
+	}
+	names := make([]string, 0, len(metricFamiliesByName))
+	for name, mf := range metricFamiliesByName {
+		if len(mf.Metric) > 0 {
+			names = append(names, name)
+		}
+	}
+	sort.Strings(names)
+	result := make([]*dto.MetricFamily, 0, len(names))
+	for _, name := range names {
+		result = append(result, metricFamiliesByName[name])
+	}
+	return result
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/labels.go b/vendor/github.com/prometheus/client_golang/prometheus/labels.go
new file mode 100644
index 000000000..2744443ac
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/labels.go
@@ -0,0 +1,87 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/prometheus/common/model"
+)
+
+// Labels represents a collection of label name -> value mappings. This type is
+// commonly used with the With(Labels) and GetMetricWith(Labels) methods of
+// metric vector Collectors, e.g.:
+//     myVec.With(Labels{"code": "404", "method": "GET"}).Add(42)
+//
+// The other use-case is the specification of constant label pairs in Opts or to
+// create a Desc.
+type Labels map[string]string
+
+// reservedLabelPrefix is a prefix which is not legal in user-supplied
+// label names.
+const reservedLabelPrefix = "__"
+
+var errInconsistentCardinality = errors.New("inconsistent label cardinality")
+
+func makeInconsistentCardinalityError(fqName string, labels, labelValues []string) error {
+	return fmt.Errorf(
+		"%s: %q has %d variable labels named %q but %d values %q were provided",
+		errInconsistentCardinality, fqName,
+		len(labels), labels,
+		len(labelValues), labelValues,
+	)
+}
+
+func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error {
+	if len(labels) != expectedNumberOfValues {
+		return fmt.Errorf(
+			"%s: expected %d label values but got %d in %#v",
+			errInconsistentCardinality, expectedNumberOfValues,
+			len(labels), labels,
+		)
+	}
+
+	for name, val := range labels {
+		if !utf8.ValidString(val) {
+			return fmt.Errorf("label %s: value %q is not valid UTF-8", name, val)
+		}
+	}
+
+	return nil
+}
+
+func validateLabelValues(vals []string, expectedNumberOfValues int) error {
+	if len(vals) != expectedNumberOfValues {
+		return fmt.Errorf(
+			"%s: expected %d label values but got %d in %#v",
+			errInconsistentCardinality, expectedNumberOfValues,
+			len(vals), vals,
+		)
+	}
+
+	for _, val := range vals {
+		if !utf8.ValidString(val) {
+			return fmt.Errorf("label value %q is not valid UTF-8", val)
+		}
+	}
+
+	return nil
+}
+
+func checkLabelName(l string) bool {
+	return model.LabelName(l).IsValid() && !strings.HasPrefix(l, reservedLabelPrefix)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/metric.go b/vendor/github.com/prometheus/client_golang/prometheus/metric.go
new file mode 100644
index 000000000..55e6d86d5
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/metric.go
@@ -0,0 +1,174 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+const separatorByte byte = 255
+
+// A Metric models a single sample value with its meta data being exported to
+// Prometheus. Implementations of Metric in this package are Gauge, Counter,
+// Histogram, Summary, and Untyped.
+type Metric interface {
+	// Desc returns the descriptor for the Metric. This method idempotently
+	// returns the same descriptor throughout the lifetime of the
+	// Metric. The returned descriptor is immutable by contract. A Metric
+	// unable to describe itself must return an invalid descriptor (created
+	// with NewInvalidDesc).
+	Desc() *Desc
+	// Write encodes the Metric into a "Metric" Protocol Buffer data
+	// transmission object.
+	//
+	// Metric implementations must observe concurrency safety as reads of
+	// this metric may occur at any time, and any blocking occurs at the
+	// expense of total performance of rendering all registered
+	// metrics. Ideally, Metric implementations should support concurrent
+	// readers.
+	//
+	// While populating dto.Metric, it is the responsibility of the
+	// implementation to ensure validity of the Metric protobuf (like valid
+	// UTF-8 strings or syntactically valid metric and label names). It is
+	// recommended to sort labels lexicographically. Callers of Write should
+	// still make sure of sorting if they depend on it.
+	Write(*dto.Metric) error
+	// TODO(beorn7): The original rationale of passing in a pre-allocated
+	// dto.Metric protobuf to save allocations has disappeared. The
+	// signature of this method should be changed to "Write() (*dto.Metric,
+	// error)".
+}
+
+// Opts bundles the options for creating most Metric types. Each metric
+// implementation XXX has its own XXXOpts type, but in most cases, it is just be
+// an alias of this type (which might change when the requirement arises.)
+//
+// It is mandatory to set Name to a non-empty string. All other fields are
+// optional and can safely be left at their zero value, although it is strongly
+// encouraged to set a Help string.
+type Opts struct {
+	// Namespace, Subsystem, and Name are components of the fully-qualified
+	// name of the Metric (created by joining these components with
+	// "_"). Only Name is mandatory, the others merely help structuring the
+	// name. Note that the fully-qualified name of the metric must be a
+	// valid Prometheus metric name.
+	Namespace string
+	Subsystem string
+	Name      string
+
+	// Help provides information about this metric.
+	//
+	// Metrics with the same fully-qualified name must have the same Help
+	// string.
+	Help string
+
+	// ConstLabels are used to attach fixed labels to this metric. Metrics
+	// with the same fully-qualified name must have the same label names in
+	// their ConstLabels.
+	//
+	// ConstLabels are only used rarely. In particular, do not use them to
+	// attach the same labels to all your metrics. Those use cases are
+	// better covered by target labels set by the scraping Prometheus
+	// server, or by one specific metric (e.g. a build_info or a
+	// machine_role metric). See also
+	// https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels
+	ConstLabels Labels
+}
+
+// BuildFQName joins the given three name components by "_". Empty name
+// components are ignored. If the name parameter itself is empty, an empty
+// string is returned, no matter what. Metric implementations included in this
+// library use this function internally to generate the fully-qualified metric
+// name from the name component in their Opts. Users of the library will only
+// need this function if they implement their own Metric or instantiate a Desc
+// (with NewDesc) directly.
+func BuildFQName(namespace, subsystem, name string) string {
+	if name == "" {
+		return ""
+	}
+	switch {
+	case namespace != "" && subsystem != "":
+		return strings.Join([]string{namespace, subsystem, name}, "_")
+	case namespace != "":
+		return strings.Join([]string{namespace, name}, "_")
+	case subsystem != "":
+		return strings.Join([]string{subsystem, name}, "_")
+	}
+	return name
+}
+
+// labelPairSorter implements sort.Interface. It is used to sort a slice of
+// dto.LabelPair pointers.
+type labelPairSorter []*dto.LabelPair
+
+func (s labelPairSorter) Len() int {
+	return len(s)
+}
+
+func (s labelPairSorter) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s labelPairSorter) Less(i, j int) bool {
+	return s[i].GetName() < s[j].GetName()
+}
+
+type invalidMetric struct {
+	desc *Desc
+	err  error
+}
+
+// NewInvalidMetric returns a metric whose Write method always returns the
+// provided error. It is useful if a Collector finds itself unable to collect
+// a metric and wishes to report an error to the registry.
+func NewInvalidMetric(desc *Desc, err error) Metric {
+	return &invalidMetric{desc, err}
+}
+
+func (m *invalidMetric) Desc() *Desc { return m.desc }
+
+func (m *invalidMetric) Write(*dto.Metric) error { return m.err }
+
+type timestampedMetric struct {
+	Metric
+	t time.Time
+}
+
+func (m timestampedMetric) Write(pb *dto.Metric) error {
+	e := m.Metric.Write(pb)
+	pb.TimestampMs = proto.Int64(m.t.Unix()*1000 + int64(m.t.Nanosecond()/1000000))
+	return e
+}
+
+// NewMetricWithTimestamp returns a new Metric wrapping the provided Metric in a
+// way that it has an explicit timestamp set to the provided Time. This is only
+// useful in rare cases as the timestamp of a Prometheus metric should usually
+// be set by the Prometheus server during scraping. Exceptions include mirroring
+// metrics with given timestamps from other metric
+// sources.
+//
+// NewMetricWithTimestamp works best with MustNewConstMetric,
+// MustNewConstHistogram, and MustNewConstSummary, see example.
+//
+// Currently, the exposition formats used by Prometheus are limited to
+// millisecond resolution. Thus, the provided time will be rounded down to the
+// next full millisecond value.
+func NewMetricWithTimestamp(t time.Time, m Metric) Metric {
+	return timestampedMetric{Metric: m, t: t}
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/observer.go b/vendor/github.com/prometheus/client_golang/prometheus/observer.go
new file mode 100644
index 000000000..5806cd09e
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/observer.go
@@ -0,0 +1,52 @@
+// Copyright 2017 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+// Observer is the interface that wraps the Observe method, which is used by
+// Histogram and Summary to add observations.
+type Observer interface {
+	Observe(float64)
+}
+
+// The ObserverFunc type is an adapter to allow the use of ordinary
+// functions as Observers. If f is a function with the appropriate
+// signature, ObserverFunc(f) is an Observer that calls f.
+//
+// This adapter is usually used in connection with the Timer type, and there are
+// two general use cases:
+//
+// The most common one is to use a Gauge as the Observer for a Timer.
+// See the "Gauge" Timer example.
+//
+// The more advanced use case is to create a function that dynamically decides
+// which Observer to use for observing the duration. See the "Complex" Timer
+// example.
+type ObserverFunc func(float64)
+
+// Observe calls f(value). It implements Observer.
+func (f ObserverFunc) Observe(value float64) {
+	f(value)
+}
+
+// ObserverVec is an interface implemented by `HistogramVec` and `SummaryVec`.
+type ObserverVec interface {
+	GetMetricWith(Labels) (Observer, error)
+	GetMetricWithLabelValues(lvs ...string) (Observer, error)
+	With(Labels) Observer
+	WithLabelValues(...string) Observer
+	CurryWith(Labels) (ObserverVec, error)
+	MustCurryWith(Labels) ObserverVec
+
+	Collector
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go
new file mode 100644
index 000000000..9b8097942
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector.go
@@ -0,0 +1,151 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"errors"
+	"os"
+)
+
+type processCollector struct {
+	collectFn       func(chan<- Metric)
+	pidFn           func() (int, error)
+	reportErrors    bool
+	cpuTotal        *Desc
+	openFDs, maxFDs *Desc
+	vsize, maxVsize *Desc
+	rss             *Desc
+	startTime       *Desc
+}
+
+// ProcessCollectorOpts defines the behavior of a process metrics collector
+// created with NewProcessCollector.
+type ProcessCollectorOpts struct {
+	// PidFn returns the PID of the process the collector collects metrics
+	// for. It is called upon each collection. By default, the PID of the
+	// current process is used, as determined on construction time by
+	// calling os.Getpid().
+	PidFn func() (int, error)
+	// If non-empty, each of the collected metrics is prefixed by the
+	// provided string and an underscore ("_").
+	Namespace string
+	// If true, any error encountered during collection is reported as an
+	// invalid metric (see NewInvalidMetric). Otherwise, errors are ignored
+	// and the collected metrics will be incomplete. (Possibly, no metrics
+	// will be collected at all.) While that's usually not desired, it is
+	// appropriate for the common "mix-in" of process metrics, where process
+	// metrics are nice to have, but failing to collect them should not
+	// disrupt the collection of the remaining metrics.
+	ReportErrors bool
+}
+
+// NewProcessCollector returns a collector which exports the current state of
+// process metrics including CPU, memory and file descriptor usage as well as
+// the process start time. The detailed behavior is defined by the provided
+// ProcessCollectorOpts. The zero value of ProcessCollectorOpts creates a
+// collector for the current process with an empty namespace string and no error
+// reporting.
+//
+// The collector only works on operating systems with a Linux-style proc
+// filesystem and on Microsoft Windows. On other operating systems, it will not
+// collect any metrics.
+func NewProcessCollector(opts ProcessCollectorOpts) Collector {
+	ns := ""
+	if len(opts.Namespace) > 0 {
+		ns = opts.Namespace + "_"
+	}
+
+	c := &processCollector{
+		reportErrors: opts.ReportErrors,
+		cpuTotal: NewDesc(
+			ns+"process_cpu_seconds_total",
+			"Total user and system CPU time spent in seconds.",
+			nil, nil,
+		),
+		openFDs: NewDesc(
+			ns+"process_open_fds",
+			"Number of open file descriptors.",
+			nil, nil,
+		),
+		maxFDs: NewDesc(
+			ns+"process_max_fds",
+			"Maximum number of open file descriptors.",
+			nil, nil,
+		),
+		vsize: NewDesc(
+			ns+"process_virtual_memory_bytes",
+			"Virtual memory size in bytes.",
+			nil, nil,
+		),
+		maxVsize: NewDesc(
+			ns+"process_virtual_memory_max_bytes",
+			"Maximum amount of virtual memory available in bytes.",
+			nil, nil,
+		),
+		rss: NewDesc(
+			ns+"process_resident_memory_bytes",
+			"Resident memory size in bytes.",
+			nil, nil,
+		),
+		startTime: NewDesc(
+			ns+"process_start_time_seconds",
+			"Start time of the process since unix epoch in seconds.",
+			nil, nil,
+		),
+	}
+
+	if opts.PidFn == nil {
+		pid := os.Getpid()
+		c.pidFn = func() (int, error) { return pid, nil }
+	} else {
+		c.pidFn = opts.PidFn
+	}
+
+	// Set up process metric collection if supported by the runtime.
+	if canCollectProcess() {
+		c.collectFn = c.processCollect
+	} else {
+		c.collectFn = func(ch chan<- Metric) {
+			c.reportError(ch, nil, errors.New("process metrics not supported on this platform"))
+		}
+	}
+
+	return c
+}
+
+// Describe returns all descriptions of the collector.
+func (c *processCollector) Describe(ch chan<- *Desc) {
+	ch <- c.cpuTotal
+	ch <- c.openFDs
+	ch <- c.maxFDs
+	ch <- c.vsize
+	ch <- c.maxVsize
+	ch <- c.rss
+	ch <- c.startTime
+}
+
+// Collect returns the current state of all metrics of the collector.
+func (c *processCollector) Collect(ch chan<- Metric) {
+	c.collectFn(ch)
+}
+
+func (c *processCollector) reportError(ch chan<- Metric, desc *Desc, err error) {
+	if !c.reportErrors {
+		return
+	}
+	if desc == nil {
+		desc = NewInvalidDesc(err)
+	}
+	ch <- NewInvalidMetric(desc, err)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go
new file mode 100644
index 000000000..3117461cd
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go
@@ -0,0 +1,65 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows
+
+package prometheus
+
+import (
+	"github.com/prometheus/procfs"
+)
+
+func canCollectProcess() bool {
+	_, err := procfs.NewDefaultFS()
+	return err == nil
+}
+
+func (c *processCollector) processCollect(ch chan<- Metric) {
+	pid, err := c.pidFn()
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+
+	p, err := procfs.NewProc(pid)
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+
+	if stat, err := p.Stat(); err == nil {
+		ch <- MustNewConstMetric(c.cpuTotal, CounterValue, stat.CPUTime())
+		ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(stat.VirtualMemory()))
+		ch <- MustNewConstMetric(c.rss, GaugeValue, float64(stat.ResidentMemory()))
+		if startTime, err := stat.StartTime(); err == nil {
+			ch <- MustNewConstMetric(c.startTime, GaugeValue, startTime)
+		} else {
+			c.reportError(ch, c.startTime, err)
+		}
+	} else {
+		c.reportError(ch, nil, err)
+	}
+
+	if fds, err := p.FileDescriptorsLen(); err == nil {
+		ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(fds))
+	} else {
+		c.reportError(ch, c.openFDs, err)
+	}
+
+	if limits, err := p.Limits(); err == nil {
+		ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(limits.OpenFiles))
+		ch <- MustNewConstMetric(c.maxVsize, GaugeValue, float64(limits.AddressSpace))
+	} else {
+		c.reportError(ch, nil, err)
+	}
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go
new file mode 100644
index 000000000..e0b935d1f
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/process_collector_windows.go
@@ -0,0 +1,112 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+func canCollectProcess() bool {
+	return true
+}
+
+var (
+	modpsapi    = syscall.NewLazyDLL("psapi.dll")
+	modkernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+	procGetProcessMemoryInfo  = modpsapi.NewProc("GetProcessMemoryInfo")
+	procGetProcessHandleCount = modkernel32.NewProc("GetProcessHandleCount")
+)
+
+type processMemoryCounters struct {
+	// https://docs.microsoft.com/en-us/windows/desktop/api/psapi/ns-psapi-_process_memory_counters_ex
+	_                          uint32
+	PageFaultCount             uint32
+	PeakWorkingSetSize         uint64
+	WorkingSetSize             uint64
+	QuotaPeakPagedPoolUsage    uint64
+	QuotaPagedPoolUsage        uint64
+	QuotaPeakNonPagedPoolUsage uint64
+	QuotaNonPagedPoolUsage     uint64
+	PagefileUsage              uint64
+	PeakPagefileUsage          uint64
+	PrivateUsage               uint64
+}
+
+func getProcessMemoryInfo(handle windows.Handle) (processMemoryCounters, error) {
+	mem := processMemoryCounters{}
+	r1, _, err := procGetProcessMemoryInfo.Call(
+		uintptr(handle),
+		uintptr(unsafe.Pointer(&mem)),
+		uintptr(unsafe.Sizeof(mem)),
+	)
+	if r1 != 1 {
+		return mem, err
+	} else {
+		return mem, nil
+	}
+}
+
+func getProcessHandleCount(handle windows.Handle) (uint32, error) {
+	var count uint32
+	r1, _, err := procGetProcessHandleCount.Call(
+		uintptr(handle),
+		uintptr(unsafe.Pointer(&count)),
+	)
+	if r1 != 1 {
+		return 0, err
+	} else {
+		return count, nil
+	}
+}
+
+func (c *processCollector) processCollect(ch chan<- Metric) {
+	h, err := windows.GetCurrentProcess()
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+
+	var startTime, exitTime, kernelTime, userTime windows.Filetime
+	err = windows.GetProcessTimes(h, &startTime, &exitTime, &kernelTime, &userTime)
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+	ch <- MustNewConstMetric(c.startTime, GaugeValue, float64(startTime.Nanoseconds()/1e9))
+	ch <- MustNewConstMetric(c.cpuTotal, CounterValue, fileTimeToSeconds(kernelTime)+fileTimeToSeconds(userTime))
+
+	mem, err := getProcessMemoryInfo(h)
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+	ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(mem.PrivateUsage))
+	ch <- MustNewConstMetric(c.rss, GaugeValue, float64(mem.WorkingSetSize))
+
+	handles, err := getProcessHandleCount(h)
+	if err != nil {
+		c.reportError(ch, nil, err)
+		return
+	}
+	ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(handles))
+	ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(16*1024*1024)) // Windows has a hard-coded max limit, not per-process.
+}
+
+func fileTimeToSeconds(ft windows.Filetime) float64 {
+	return float64(uint64(ft.HighDateTime)<<32+uint64(ft.LowDateTime)) / 1e7
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go
new file mode 100644
index 000000000..fa535684f
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/delegator.go
@@ -0,0 +1,357 @@
+// Copyright 2017 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package promhttp
+
+import (
+	"bufio"
+	"io"
+	"net"
+	"net/http"
+)
+
+const (
+	closeNotifier = 1 << iota
+	flusher
+	hijacker
+	readerFrom
+	pusher
+)
+
+type delegator interface {
+	http.ResponseWriter
+
+	Status() int
+	Written() int64
+}
+
+type responseWriterDelegator struct {
+	http.ResponseWriter
+
+	status             int
+	written            int64
+	wroteHeader        bool
+	observeWriteHeader func(int)
+}
+
+func (r *responseWriterDelegator) Status() int {
+	return r.status
+}
+
+func (r *responseWriterDelegator) Written() int64 {
+	return r.written
+}
+
+func (r *responseWriterDelegator) WriteHeader(code int) {
+	r.status = code
+	r.wroteHeader = true
+	r.ResponseWriter.WriteHeader(code)
+	if r.observeWriteHeader != nil {
+		r.observeWriteHeader(code)
+	}
+}
+
+func (r *responseWriterDelegator) Write(b []byte) (int, error) {
+	if !r.wroteHeader {
+		r.WriteHeader(http.StatusOK)
+	}
+	n, err := r.ResponseWriter.Write(b)
+	r.written += int64(n)
+	return n, err
+}
+
+type closeNotifierDelegator struct{ *responseWriterDelegator }
+type flusherDelegator struct{ *responseWriterDelegator }
+type hijackerDelegator struct{ *responseWriterDelegator }
+type readerFromDelegator struct{ *responseWriterDelegator }
+type pusherDelegator struct{ *responseWriterDelegator }
+
+func (d closeNotifierDelegator) CloseNotify() <-chan bool {
+	//lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to
+	//remove support from client_golang yet.
+	return d.ResponseWriter.(http.CloseNotifier).CloseNotify()
+}
+func (d flusherDelegator) Flush() {
+	d.ResponseWriter.(http.Flusher).Flush()
+}
+func (d hijackerDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return d.ResponseWriter.(http.Hijacker).Hijack()
+}
+func (d readerFromDelegator) ReadFrom(re io.Reader) (int64, error) {
+	if !d.wroteHeader {
+		d.WriteHeader(http.StatusOK)
+	}
+	n, err := d.ResponseWriter.(io.ReaderFrom).ReadFrom(re)
+	d.written += n
+	return n, err
+}
+func (d pusherDelegator) Push(target string, opts *http.PushOptions) error {
+	return d.ResponseWriter.(http.Pusher).Push(target, opts)
+}
+
+var pickDelegator = make([]func(*responseWriterDelegator) delegator, 32)
+
+func init() {
+	// TODO(beorn7): Code generation would help here.
+	pickDelegator[0] = func(d *responseWriterDelegator) delegator { // 0
+		return d
+	}
+	pickDelegator[closeNotifier] = func(d *responseWriterDelegator) delegator { // 1
+		return closeNotifierDelegator{d}
+	}
+	pickDelegator[flusher] = func(d *responseWriterDelegator) delegator { // 2
+		return flusherDelegator{d}
+	}
+	pickDelegator[flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 3
+		return struct {
+			*responseWriterDelegator
+			http.Flusher
+			http.CloseNotifier
+		}{d, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[hijacker] = func(d *responseWriterDelegator) delegator { // 4
+		return hijackerDelegator{d}
+	}
+	pickDelegator[hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 5
+		return struct {
+			*responseWriterDelegator
+			http.Hijacker
+			http.CloseNotifier
+		}{d, hijackerDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 6
+		return struct {
+			*responseWriterDelegator
+			http.Hijacker
+			http.Flusher
+		}{d, hijackerDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 7
+		return struct {
+			*responseWriterDelegator
+			http.Hijacker
+			http.Flusher
+			http.CloseNotifier
+		}{d, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[readerFrom] = func(d *responseWriterDelegator) delegator { // 8
+		return readerFromDelegator{d}
+	}
+	pickDelegator[readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 9
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.CloseNotifier
+		}{d, readerFromDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 10
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Flusher
+		}{d, readerFromDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 11
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Flusher
+			http.CloseNotifier
+		}{d, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 12
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Hijacker
+		}{d, readerFromDelegator{d}, hijackerDelegator{d}}
+	}
+	pickDelegator[readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 13
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Hijacker
+			http.CloseNotifier
+		}{d, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 14
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Hijacker
+			http.Flusher
+		}{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 15
+		return struct {
+			*responseWriterDelegator
+			io.ReaderFrom
+			http.Hijacker
+			http.Flusher
+			http.CloseNotifier
+		}{d, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16
+		return pusherDelegator{d}
+	}
+	pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+flusher] = func(d *responseWriterDelegator) delegator { // 18
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Flusher
+		}{d, pusherDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[pusher+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 19
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Flusher
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+hijacker] = func(d *responseWriterDelegator) delegator { // 20
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Hijacker
+		}{d, pusherDelegator{d}, hijackerDelegator{d}}
+	}
+	pickDelegator[pusher+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 21
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Hijacker
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 22
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Hijacker
+			http.Flusher
+		}{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[pusher+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { //23
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			http.Hijacker
+			http.Flusher
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom] = func(d *responseWriterDelegator) delegator { // 24
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+		}{d, pusherDelegator{d}, readerFromDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 25
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 26
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Flusher
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 27
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Flusher
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 28
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Hijacker
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 29
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Hijacker
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 30
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Hijacker
+			http.Flusher
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}}
+	}
+	pickDelegator[pusher+readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 31
+		return struct {
+			*responseWriterDelegator
+			http.Pusher
+			io.ReaderFrom
+			http.Hijacker
+			http.Flusher
+			http.CloseNotifier
+		}{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
+	}
+}
+
+func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator {
+	d := &responseWriterDelegator{
+		ResponseWriter:     w,
+		observeWriteHeader: observeWriteHeaderFunc,
+	}
+
+	id := 0
+	//lint:ignore SA1019 http.CloseNotifier is deprecated but we don't want to
+	//remove support from client_golang yet.
+	if _, ok := w.(http.CloseNotifier); ok {
+		id += closeNotifier
+	}
+	if _, ok := w.(http.Flusher); ok {
+		id += flusher
+	}
+	if _, ok := w.(http.Hijacker); ok {
+		id += hijacker
+	}
+	if _, ok := w.(io.ReaderFrom); ok {
+		id += readerFrom
+	}
+	if _, ok := w.(http.Pusher); ok {
+		id += pusher
+	}
+
+	return pickDelegator[id](d)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go
new file mode 100644
index 000000000..cea5a90fd
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go
@@ -0,0 +1,349 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package promhttp provides tooling around HTTP servers and clients.
+//
+// First, the package allows the creation of http.Handler instances to expose
+// Prometheus metrics via HTTP. promhttp.Handler acts on the
+// prometheus.DefaultGatherer. With HandlerFor, you can create a handler for a
+// custom registry or anything that implements the Gatherer interface. It also
+// allows the creation of handlers that act differently on errors or allow to
+// log errors.
+//
+// Second, the package provides tooling to instrument instances of http.Handler
+// via middleware. Middleware wrappers follow the naming scheme
+// InstrumentHandlerX, where X describes the intended use of the middleware.
+// See each function's doc comment for specific details.
+//
+// Finally, the package allows for an http.RoundTripper to be instrumented via
+// middleware. Middleware wrappers follow the naming scheme
+// InstrumentRoundTripperX, where X describes the intended use of the
+// middleware. See each function's doc comment for specific details.
+package promhttp
+
+import (
+	"compress/gzip"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/prometheus/common/expfmt"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	contentTypeHeader     = "Content-Type"
+	contentEncodingHeader = "Content-Encoding"
+	acceptEncodingHeader  = "Accept-Encoding"
+)
+
+var gzipPool = sync.Pool{
+	New: func() interface{} {
+		return gzip.NewWriter(nil)
+	},
+}
+
+// Handler returns an http.Handler for the prometheus.DefaultGatherer, using
+// default HandlerOpts, i.e. it reports the first error as an HTTP error, it has
+// no error logging, and it applies compression if requested by the client.
+//
+// The returned http.Handler is already instrumented using the
+// InstrumentMetricHandler function and the prometheus.DefaultRegisterer. If you
+// create multiple http.Handlers by separate calls of the Handler function, the
+// metrics used for instrumentation will be shared between them, providing
+// global scrape counts.
+//
+// This function is meant to cover the bulk of basic use cases. If you are doing
+// anything that requires more customization (including using a non-default
+// Gatherer, different instrumentation, and non-default HandlerOpts), use the
+// HandlerFor function. See there for details.
+func Handler() http.Handler {
+	return InstrumentMetricHandler(
+		prometheus.DefaultRegisterer, HandlerFor(prometheus.DefaultGatherer, HandlerOpts{}),
+	)
+}
+
+// HandlerFor returns an uninstrumented http.Handler for the provided
+// Gatherer. The behavior of the Handler is defined by the provided
+// HandlerOpts. Thus, HandlerFor is useful to create http.Handlers for custom
+// Gatherers, with non-default HandlerOpts, and/or with custom (or no)
+// instrumentation. Use the InstrumentMetricHandler function to apply the same
+// kind of instrumentation as it is used by the Handler function.
+func HandlerFor(reg prometheus.Gatherer, opts HandlerOpts) http.Handler {
+	var (
+		inFlightSem chan struct{}
+		errCnt      = prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Name: "promhttp_metric_handler_errors_total",
+				Help: "Total number of internal errors encountered by the promhttp metric handler.",
+			},
+			[]string{"cause"},
+		)
+	)
+
+	if opts.MaxRequestsInFlight > 0 {
+		inFlightSem = make(chan struct{}, opts.MaxRequestsInFlight)
+	}
+	if opts.Registry != nil {
+		// Initialize all possibilites that can occur below.
+		errCnt.WithLabelValues("gathering")
+		errCnt.WithLabelValues("encoding")
+		if err := opts.Registry.Register(errCnt); err != nil {
+			if are, ok := err.(prometheus.AlreadyRegisteredError); ok {
+				errCnt = are.ExistingCollector.(*prometheus.CounterVec)
+			} else {
+				panic(err)
+			}
+		}
+	}
+
+	h := http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) {
+		if inFlightSem != nil {
+			select {
+			case inFlightSem <- struct{}{}: // All good, carry on.
+				defer func() { <-inFlightSem }()
+			default:
+				http.Error(rsp, fmt.Sprintf(
+					"Limit of concurrent requests reached (%d), try again later.", opts.MaxRequestsInFlight,
+				), http.StatusServiceUnavailable)
+				return
+			}
+		}
+		mfs, err := reg.Gather()
+		if err != nil {
+			if opts.ErrorLog != nil {
+				opts.ErrorLog.Println("error gathering metrics:", err)
+			}
+			errCnt.WithLabelValues("gathering").Inc()
+			switch opts.ErrorHandling {
+			case PanicOnError:
+				panic(err)
+			case ContinueOnError:
+				if len(mfs) == 0 {
+					// Still report the error if no metrics have been gathered.
+					httpError(rsp, err)
+					return
+				}
+			case HTTPErrorOnError:
+				httpError(rsp, err)
+				return
+			}
+		}
+
+		contentType := expfmt.Negotiate(req.Header)
+		header := rsp.Header()
+		header.Set(contentTypeHeader, string(contentType))
+
+		w := io.Writer(rsp)
+		if !opts.DisableCompression && gzipAccepted(req.Header) {
+			header.Set(contentEncodingHeader, "gzip")
+			gz := gzipPool.Get().(*gzip.Writer)
+			defer gzipPool.Put(gz)
+
+			gz.Reset(w)
+			defer gz.Close()
+
+			w = gz
+		}
+
+		enc := expfmt.NewEncoder(w, contentType)
+
+		var lastErr error
+		for _, mf := range mfs {
+			if err := enc.Encode(mf); err != nil {
+				lastErr = err
+				if opts.ErrorLog != nil {
+					opts.ErrorLog.Println("error encoding and sending metric family:", err)
+				}
+				errCnt.WithLabelValues("encoding").Inc()
+				switch opts.ErrorHandling {
+				case PanicOnError:
+					panic(err)
+				case ContinueOnError:
+					// Handled later.
+				case HTTPErrorOnError:
+					httpError(rsp, err)
+					return
+				}
+			}
+		}
+
+		if lastErr != nil {
+			httpError(rsp, lastErr)
+		}
+	})
+
+	if opts.Timeout <= 0 {
+		return h
+	}
+	return http.TimeoutHandler(h, opts.Timeout, fmt.Sprintf(
+		"Exceeded configured timeout of %v.\n",
+		opts.Timeout,
+	))
+}
+
+// InstrumentMetricHandler is usually used with an http.Handler returned by the
+// HandlerFor function. It instruments the provided http.Handler with two
+// metrics: A counter vector "promhttp_metric_handler_requests_total" to count
+// scrapes partitioned by HTTP status code, and a gauge
+// "promhttp_metric_handler_requests_in_flight" to track the number of
+// simultaneous scrapes. This function idempotently registers collectors for
+// both metrics with the provided Registerer. It panics if the registration
+// fails. The provided metrics are useful to see how many scrapes hit the
+// monitored target (which could be from different Prometheus servers or other
+// scrapers), and how often they overlap (which would result in more than one
+// scrape in flight at the same time). Note that the scrapes-in-flight gauge
+// will contain the scrape by which it is exposed, while the scrape counter will
+// only get incremented after the scrape is complete (as only then the status
+// code is known). For tracking scrape durations, use the
+// "scrape_duration_seconds" gauge created by the Prometheus server upon each
+// scrape.
+func InstrumentMetricHandler(reg prometheus.Registerer, handler http.Handler) http.Handler {
+	cnt := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "promhttp_metric_handler_requests_total",
+			Help: "Total number of scrapes by HTTP status code.",
+		},
+		[]string{"code"},
+	)
+	// Initialize the most likely HTTP status codes.
+	cnt.WithLabelValues("200")
+	cnt.WithLabelValues("500")
+	cnt.WithLabelValues("503")
+	if err := reg.Register(cnt); err != nil {
+		if are, ok := err.(prometheus.AlreadyRegisteredError); ok {
+			cnt = are.ExistingCollector.(*prometheus.CounterVec)
+		} else {
+			panic(err)
+		}
+	}
+
+	gge := prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "promhttp_metric_handler_requests_in_flight",
+		Help: "Current number of scrapes being served.",
+	})
+	if err := reg.Register(gge); err != nil {
+		if are, ok := err.(prometheus.AlreadyRegisteredError); ok {
+			gge = are.ExistingCollector.(prometheus.Gauge)
+		} else {
+			panic(err)
+		}
+	}
+
+	return InstrumentHandlerCounter(cnt, InstrumentHandlerInFlight(gge, handler))
+}
+
+// HandlerErrorHandling defines how a Handler serving metrics will handle
+// errors.
+type HandlerErrorHandling int
+
+// These constants cause handlers serving metrics to behave as described if
+// errors are encountered.
+const (
+	// Serve an HTTP status code 500 upon the first error
+	// encountered. Report the error message in the body.
+	HTTPErrorOnError HandlerErrorHandling = iota
+	// Ignore errors and try to serve as many metrics as possible.  However,
+	// if no metrics can be served, serve an HTTP status code 500 and the
+	// last error message in the body. Only use this in deliberate "best
+	// effort" metrics collection scenarios. In this case, it is highly
+	// recommended to provide other means of detecting errors: By setting an
+	// ErrorLog in HandlerOpts, the errors are logged. By providing a
+	// Registry in HandlerOpts, the exposed metrics include an error counter
+	// "promhttp_metric_handler_errors_total", which can be used for
+	// alerts.
+	ContinueOnError
+	// Panic upon the first error encountered (useful for "crash only" apps).
+	PanicOnError
+)
+
+// Logger is the minimal interface HandlerOpts needs for logging. Note that
+// log.Logger from the standard library implements this interface, and it is
+// easy to implement by custom loggers, if they don't do so already anyway.
+type Logger interface {
+	Println(v ...interface{})
+}
+
+// HandlerOpts specifies options how to serve metrics via an http.Handler. The
+// zero value of HandlerOpts is a reasonable default.
+type HandlerOpts struct {
+	// ErrorLog specifies an optional logger for errors collecting and
+	// serving metrics. If nil, errors are not logged at all.
+	ErrorLog Logger
+	// ErrorHandling defines how errors are handled. Note that errors are
+	// logged regardless of the configured ErrorHandling provided ErrorLog
+	// is not nil.
+	ErrorHandling HandlerErrorHandling
+	// If Registry is not nil, it is used to register a metric
+	// "promhttp_metric_handler_errors_total", partitioned by "cause". A
+	// failed registration causes a panic. Note that this error counter is
+	// different from the instrumentation you get from the various
+	// InstrumentHandler... helpers. It counts errors that don't necessarily
+	// result in a non-2xx HTTP status code. There are two typical cases:
+	// (1) Encoding errors that only happen after streaming of the HTTP body
+	// has already started (and the status code 200 has been sent). This
+	// should only happen with custom collectors. (2) Collection errors with
+	// no effect on the HTTP status code because ErrorHandling is set to
+	// ContinueOnError.
+	Registry prometheus.Registerer
+	// If DisableCompression is true, the handler will never compress the
+	// response, even if requested by the client.
+	DisableCompression bool
+	// The number of concurrent HTTP requests is limited to
+	// MaxRequestsInFlight. Additional requests are responded to with 503
+	// Service Unavailable and a suitable message in the body. If
+	// MaxRequestsInFlight is 0 or negative, no limit is applied.
+	MaxRequestsInFlight int
+	// If handling a request takes longer than Timeout, it is responded to
+	// with 503 ServiceUnavailable and a suitable Message. No timeout is
+	// applied if Timeout is 0 or negative. Note that with the current
+	// implementation, reaching the timeout simply ends the HTTP requests as
+	// described above (and even that only if sending of the body hasn't
+	// started yet), while the bulk work of gathering all the metrics keeps
+	// running in the background (with the eventual result to be thrown
+	// away). Until the implementation is improved, it is recommended to
+	// implement a separate timeout in potentially slow Collectors.
+	Timeout time.Duration
+}
+
+// gzipAccepted returns whether the client will accept gzip-encoded content.
+func gzipAccepted(header http.Header) bool {
+	a := header.Get(acceptEncodingHeader)
+	parts := strings.Split(a, ",")
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "gzip" || strings.HasPrefix(part, "gzip;") {
+			return true
+		}
+	}
+	return false
+}
+
+// httpError removes any content-encoding header and then calls http.Error with
+// the provided error and http.StatusInternalServerErrer. Error contents is
+// supposed to be uncompressed plain text. However, same as with a plain
+// http.Error, any header settings will be void if the header has already been
+// sent. The error message will still be written to the writer, but it will
+// probably be of limited use.
+func httpError(rsp http.ResponseWriter, err error) {
+	rsp.Header().Del(contentEncodingHeader)
+	http.Error(
+		rsp,
+		"An error has occurred while serving metrics:\n\n"+err.Error(),
+		http.StatusInternalServerError,
+	)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go
new file mode 100644
index 000000000..83c49b66a
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go
@@ -0,0 +1,219 @@
+// Copyright 2017 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package promhttp
+
+import (
+	"crypto/tls"
+	"net/http"
+	"net/http/httptrace"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// The RoundTripperFunc type is an adapter to allow the use of ordinary
+// functions as RoundTrippers. If f is a function with the appropriate
+// signature, RountTripperFunc(f) is a RoundTripper that calls f.
+type RoundTripperFunc func(req *http.Request) (*http.Response, error)
+
+// RoundTrip implements the RoundTripper interface.
+func (rt RoundTripperFunc) RoundTrip(r *http.Request) (*http.Response, error) {
+	return rt(r)
+}
+
+// InstrumentRoundTripperInFlight is a middleware that wraps the provided
+// http.RoundTripper. It sets the provided prometheus.Gauge to the number of
+// requests currently handled by the wrapped http.RoundTripper.
+//
+// See the example for ExampleInstrumentRoundTripperDuration for example usage.
+func InstrumentRoundTripperInFlight(gauge prometheus.Gauge, next http.RoundTripper) RoundTripperFunc {
+	return RoundTripperFunc(func(r *http.Request) (*http.Response, error) {
+		gauge.Inc()
+		defer gauge.Dec()
+		return next.RoundTrip(r)
+	})
+}
+
+// InstrumentRoundTripperCounter is a middleware that wraps the provided
+// http.RoundTripper to observe the request result with the provided CounterVec.
+// The CounterVec must have zero, one, or two non-const non-curried labels. For
+// those, the only allowed label names are "code" and "method". The function
+// panics otherwise. Partitioning of the CounterVec happens by HTTP status code
+// and/or HTTP method if the respective instance label names are present in the
+// CounterVec. For unpartitioned counting, use a CounterVec with zero labels.
+//
+// If the wrapped RoundTripper panics or returns a non-nil error, the Counter
+// is not incremented.
+//
+// See the example for ExampleInstrumentRoundTripperDuration for example usage.
+func InstrumentRoundTripperCounter(counter *prometheus.CounterVec, next http.RoundTripper) RoundTripperFunc {
+	code, method := checkLabels(counter)
+
+	return RoundTripperFunc(func(r *http.Request) (*http.Response, error) {
+		resp, err := next.RoundTrip(r)
+		if err == nil {
+			counter.With(labels(code, method, r.Method, resp.StatusCode)).Inc()
+		}
+		return resp, err
+	})
+}
+
+// InstrumentRoundTripperDuration is a middleware that wraps the provided
+// http.RoundTripper to observe the request duration with the provided
+// ObserverVec.  The ObserverVec must have zero, one, or two non-const
+// non-curried labels. For those, the only allowed label names are "code" and
+// "method". The function panics otherwise. The Observe method of the Observer
+// in the ObserverVec is called with the request duration in
+// seconds. Partitioning happens by HTTP status code and/or HTTP method if the
+// respective instance label names are present in the ObserverVec. For
+// unpartitioned observations, use an ObserverVec with zero labels. Note that
+// partitioning of Histograms is expensive and should be used judiciously.
+//
+// If the wrapped RoundTripper panics or returns a non-nil error, no values are
+// reported.
+//
+// Note that this method is only guaranteed to never observe negative durations
+// if used with Go1.9+.
+func InstrumentRoundTripperDuration(obs prometheus.ObserverVec, next http.RoundTripper) RoundTripperFunc {
+	code, method := checkLabels(obs)
+
+	return RoundTripperFunc(func(r *http.Request) (*http.Response, error) {
+		start := time.Now()
+		resp, err := next.RoundTrip(r)
+		if err == nil {
+			obs.With(labels(code, method, r.Method, resp.StatusCode)).Observe(time.Since(start).Seconds())
+		}
+		return resp, err
+	})
+}
+
+// InstrumentTrace is used to offer flexibility in instrumenting the available
+// httptrace.ClientTrace hook functions. Each function is passed a float64
+// representing the time in seconds since the start of the http request. A user
+// may choose to use separately buckets Histograms, or implement custom
+// instance labels on a per function basis.
+type InstrumentTrace struct {
+	GotConn              func(float64)
+	PutIdleConn          func(float64)
+	GotFirstResponseByte func(float64)
+	Got100Continue       func(float64)
+	DNSStart             func(float64)
+	DNSDone              func(float64)
+	ConnectStart         func(float64)
+	ConnectDone          func(float64)
+	TLSHandshakeStart    func(float64)
+	TLSHandshakeDone     func(float64)
+	WroteHeaders         func(float64)
+	Wait100Continue      func(float64)
+	WroteRequest         func(float64)
+}
+
+// InstrumentRoundTripperTrace is a middleware that wraps the provided
+// RoundTripper and reports times to hook functions provided in the
+// InstrumentTrace struct. Hook functions that are not present in the provided
+// InstrumentTrace struct are ignored. Times reported to the hook functions are
+// time since the start of the request. Only with Go1.9+, those times are
+// guaranteed to never be negative. (Earlier Go versions are not using a
+// monotonic clock.) Note that partitioning of Histograms is expensive and
+// should be used judiciously.
+//
+// For hook functions that receive an error as an argument, no observations are
+// made in the event of a non-nil error value.
+//
+// See the example for ExampleInstrumentRoundTripperDuration for example usage.
+func InstrumentRoundTripperTrace(it *InstrumentTrace, next http.RoundTripper) RoundTripperFunc {
+	return RoundTripperFunc(func(r *http.Request) (*http.Response, error) {
+		start := time.Now()
+
+		trace := &httptrace.ClientTrace{
+			GotConn: func(_ httptrace.GotConnInfo) {
+				if it.GotConn != nil {
+					it.GotConn(time.Since(start).Seconds())
+				}
+			},
+			PutIdleConn: func(err error) {
+				if err != nil {
+					return
+				}
+				if it.PutIdleConn != nil {
+					it.PutIdleConn(time.Since(start).Seconds())
+				}
+			},
+			DNSStart: func(_ httptrace.DNSStartInfo) {
+				if it.DNSStart != nil {
+					it.DNSStart(time.Since(start).Seconds())
+				}
+			},
+			DNSDone: func(_ httptrace.DNSDoneInfo) {
+				if it.DNSDone != nil {
+					it.DNSDone(time.Since(start).Seconds())
+				}
+			},
+			ConnectStart: func(_, _ string) {
+				if it.ConnectStart != nil {
+					it.ConnectStart(time.Since(start).Seconds())
+				}
+			},
+			ConnectDone: func(_, _ string, err error) {
+				if err != nil {
+					return
+				}
+				if it.ConnectDone != nil {
+					it.ConnectDone(time.Since(start).Seconds())
+				}
+			},
+			GotFirstResponseByte: func() {
+				if it.GotFirstResponseByte != nil {
+					it.GotFirstResponseByte(time.Since(start).Seconds())
+				}
+			},
+			Got100Continue: func() {
+				if it.Got100Continue != nil {
+					it.Got100Continue(time.Since(start).Seconds())
+				}
+			},
+			TLSHandshakeStart: func() {
+				if it.TLSHandshakeStart != nil {
+					it.TLSHandshakeStart(time.Since(start).Seconds())
+				}
+			},
+			TLSHandshakeDone: func(_ tls.ConnectionState, err error) {
+				if err != nil {
+					return
+				}
+				if it.TLSHandshakeDone != nil {
+					it.TLSHandshakeDone(time.Since(start).Seconds())
+				}
+			},
+			WroteHeaders: func() {
+				if it.WroteHeaders != nil {
+					it.WroteHeaders(time.Since(start).Seconds())
+				}
+			},
+			Wait100Continue: func() {
+				if it.Wait100Continue != nil {
+					it.Wait100Continue(time.Since(start).Seconds())
+				}
+			},
+			WroteRequest: func(_ httptrace.WroteRequestInfo) {
+				if it.WroteRequest != nil {
+					it.WroteRequest(time.Since(start).Seconds())
+				}
+			},
+		}
+		r = r.WithContext(httptrace.WithClientTrace(r.Context(), trace))
+
+		return next.RoundTrip(r)
+	})
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go
new file mode 100644
index 000000000..9db243805
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go
@@ -0,0 +1,447 @@
+// Copyright 2017 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package promhttp
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// magicString is used for the hacky label test in checkLabels. Remove once fixed.
+const magicString = "zZgWfBxLqvG8kc8IMv3POi2Bb0tZI3vAnBx+gBaFi9FyPzB/CzKUer1yufDa"
+
+// InstrumentHandlerInFlight is a middleware that wraps the provided
+// http.Handler. It sets the provided prometheus.Gauge to the number of
+// requests currently handled by the wrapped http.Handler.
+//
+// See the example for InstrumentHandlerDuration for example usage.
+func InstrumentHandlerInFlight(g prometheus.Gauge, next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		g.Inc()
+		defer g.Dec()
+		next.ServeHTTP(w, r)
+	})
+}
+
+// InstrumentHandlerDuration is a middleware that wraps the provided
+// http.Handler to observe the request duration with the provided ObserverVec.
+// The ObserverVec must have zero, one, or two non-const non-curried labels. For
+// those, the only allowed label names are "code" and "method". The function
+// panics otherwise. The Observe method of the Observer in the ObserverVec is
+// called with the request duration in seconds. Partitioning happens by HTTP
+// status code and/or HTTP method if the respective instance label names are
+// present in the ObserverVec. For unpartitioned observations, use an
+// ObserverVec with zero labels. Note that partitioning of Histograms is
+// expensive and should be used judiciously.
+//
+// If the wrapped Handler does not set a status code, a status code of 200 is assumed.
+//
+// If the wrapped Handler panics, no values are reported.
+//
+// Note that this method is only guaranteed to never observe negative durations
+// if used with Go1.9+.
+func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc {
+	code, method := checkLabels(obs)
+
+	if code {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			now := time.Now()
+			d := newDelegator(w, nil)
+			next.ServeHTTP(d, r)
+
+			obs.With(labels(code, method, r.Method, d.Status())).Observe(time.Since(now).Seconds())
+		})
+	}
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		now := time.Now()
+		next.ServeHTTP(w, r)
+		obs.With(labels(code, method, r.Method, 0)).Observe(time.Since(now).Seconds())
+	})
+}
+
+// InstrumentHandlerCounter is a middleware that wraps the provided http.Handler
+// to observe the request result with the provided CounterVec.  The CounterVec
+// must have zero, one, or two non-const non-curried labels. For those, the only
+// allowed label names are "code" and "method". The function panics
+// otherwise. Partitioning of the CounterVec happens by HTTP status code and/or
+// HTTP method if the respective instance label names are present in the
+// CounterVec. For unpartitioned counting, use a CounterVec with zero labels.
+//
+// If the wrapped Handler does not set a status code, a status code of 200 is assumed.
+//
+// If the wrapped Handler panics, the Counter is not incremented.
+//
+// See the example for InstrumentHandlerDuration for example usage.
+func InstrumentHandlerCounter(counter *prometheus.CounterVec, next http.Handler) http.HandlerFunc {
+	code, method := checkLabels(counter)
+
+	if code {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			d := newDelegator(w, nil)
+			next.ServeHTTP(d, r)
+			counter.With(labels(code, method, r.Method, d.Status())).Inc()
+		})
+	}
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		next.ServeHTTP(w, r)
+		counter.With(labels(code, method, r.Method, 0)).Inc()
+	})
+}
+
+// InstrumentHandlerTimeToWriteHeader is a middleware that wraps the provided
+// http.Handler to observe with the provided ObserverVec the request duration
+// until the response headers are written. The ObserverVec must have zero, one,
+// or two non-const non-curried labels. For those, the only allowed label names
+// are "code" and "method". The function panics otherwise. The Observe method of
+// the Observer in the ObserverVec is called with the request duration in
+// seconds. Partitioning happens by HTTP status code and/or HTTP method if the
+// respective instance label names are present in the ObserverVec. For
+// unpartitioned observations, use an ObserverVec with zero labels. Note that
+// partitioning of Histograms is expensive and should be used judiciously.
+//
+// If the wrapped Handler panics before calling WriteHeader, no value is
+// reported.
+//
+// Note that this method is only guaranteed to never observe negative durations
+// if used with Go1.9+.
+//
+// See the example for InstrumentHandlerDuration for example usage.
+func InstrumentHandlerTimeToWriteHeader(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc {
+	code, method := checkLabels(obs)
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		now := time.Now()
+		d := newDelegator(w, func(status int) {
+			obs.With(labels(code, method, r.Method, status)).Observe(time.Since(now).Seconds())
+		})
+		next.ServeHTTP(d, r)
+	})
+}
+
+// InstrumentHandlerRequestSize is a middleware that wraps the provided
+// http.Handler to observe the request size with the provided ObserverVec.  The
+// ObserverVec must have zero, one, or two non-const non-curried labels. For
+// those, the only allowed label names are "code" and "method". The function
+// panics otherwise. The Observe method of the Observer in the ObserverVec is
+// called with the request size in bytes. Partitioning happens by HTTP status
+// code and/or HTTP method if the respective instance label names are present in
+// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero
+// labels. Note that partitioning of Histograms is expensive and should be used
+// judiciously.
+//
+// If the wrapped Handler does not set a status code, a status code of 200 is assumed.
+//
+// If the wrapped Handler panics, no values are reported.
+//
+// See the example for InstrumentHandlerDuration for example usage.
+func InstrumentHandlerRequestSize(obs prometheus.ObserverVec, next http.Handler) http.HandlerFunc {
+	code, method := checkLabels(obs)
+
+	if code {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			d := newDelegator(w, nil)
+			next.ServeHTTP(d, r)
+			size := computeApproximateRequestSize(r)
+			obs.With(labels(code, method, r.Method, d.Status())).Observe(float64(size))
+		})
+	}
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		next.ServeHTTP(w, r)
+		size := computeApproximateRequestSize(r)
+		obs.With(labels(code, method, r.Method, 0)).Observe(float64(size))
+	})
+}
+
+// InstrumentHandlerResponseSize is a middleware that wraps the provided
+// http.Handler to observe the response size with the provided ObserverVec.  The
+// ObserverVec must have zero, one, or two non-const non-curried labels. For
+// those, the only allowed label names are "code" and "method". The function
+// panics otherwise. The Observe method of the Observer in the ObserverVec is
+// called with the response size in bytes. Partitioning happens by HTTP status
+// code and/or HTTP method if the respective instance label names are present in
+// the ObserverVec. For unpartitioned observations, use an ObserverVec with zero
+// labels. Note that partitioning of Histograms is expensive and should be used
+// judiciously.
+//
+// If the wrapped Handler does not set a status code, a status code of 200 is assumed.
+//
+// If the wrapped Handler panics, no values are reported.
+//
+// See the example for InstrumentHandlerDuration for example usage.
+func InstrumentHandlerResponseSize(obs prometheus.ObserverVec, next http.Handler) http.Handler {
+	code, method := checkLabels(obs)
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		d := newDelegator(w, nil)
+		next.ServeHTTP(d, r)
+		obs.With(labels(code, method, r.Method, d.Status())).Observe(float64(d.Written()))
+	})
+}
+
+func checkLabels(c prometheus.Collector) (code bool, method bool) {
+	// TODO(beorn7): Remove this hacky way to check for instance labels
+	// once Descriptors can have their dimensionality queried.
+	var (
+		desc *prometheus.Desc
+		m    prometheus.Metric
+		pm   dto.Metric
+		lvs  []string
+	)
+
+	// Get the Desc from the Collector.
+	descc := make(chan *prometheus.Desc, 1)
+	c.Describe(descc)
+
+	select {
+	case desc = <-descc:
+	default:
+		panic("no description provided by collector")
+	}
+	select {
+	case <-descc:
+		panic("more than one description provided by collector")
+	default:
+	}
+
+	close(descc)
+
+	// Create a ConstMetric with the Desc. Since we don't know how many
+	// variable labels there are, try for as long as it needs.
+	for err := errors.New("dummy"); err != nil; lvs = append(lvs, magicString) {
+		m, err = prometheus.NewConstMetric(desc, prometheus.UntypedValue, 0, lvs...)
+	}
+
+	// Write out the metric into a proto message and look at the labels.
+	// If the value is not the magicString, it is a constLabel, which doesn't interest us.
+	// If the label is curried, it doesn't interest us.
+	// In all other cases, only "code" or "method" is allowed.
+	if err := m.Write(&pm); err != nil {
+		panic("error checking metric for labels")
+	}
+	for _, label := range pm.Label {
+		name, value := label.GetName(), label.GetValue()
+		if value != magicString || isLabelCurried(c, name) {
+			continue
+		}
+		switch name {
+		case "code":
+			code = true
+		case "method":
+			method = true
+		default:
+			panic("metric partitioned with non-supported labels")
+		}
+	}
+	return
+}
+
+func isLabelCurried(c prometheus.Collector, label string) bool {
+	// This is even hackier than the label test above.
+	// We essentially try to curry again and see if it works.
+	// But for that, we need to type-convert to the two
+	// types we use here, ObserverVec or *CounterVec.
+	switch v := c.(type) {
+	case *prometheus.CounterVec:
+		if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil {
+			return false
+		}
+	case prometheus.ObserverVec:
+		if _, err := v.CurryWith(prometheus.Labels{label: "dummy"}); err == nil {
+			return false
+		}
+	default:
+		panic("unsupported metric vec type")
+	}
+	return true
+}
+
+// emptyLabels is a one-time allocation for non-partitioned metrics to avoid
+// unnecessary allocations on each request.
+var emptyLabels = prometheus.Labels{}
+
+func labels(code, method bool, reqMethod string, status int) prometheus.Labels {
+	if !(code || method) {
+		return emptyLabels
+	}
+	labels := prometheus.Labels{}
+
+	if code {
+		labels["code"] = sanitizeCode(status)
+	}
+	if method {
+		labels["method"] = sanitizeMethod(reqMethod)
+	}
+
+	return labels
+}
+
+func computeApproximateRequestSize(r *http.Request) int {
+	s := 0
+	if r.URL != nil {
+		s += len(r.URL.String())
+	}
+
+	s += len(r.Method)
+	s += len(r.Proto)
+	for name, values := range r.Header {
+		s += len(name)
+		for _, value := range values {
+			s += len(value)
+		}
+	}
+	s += len(r.Host)
+
+	// N.B. r.Form and r.MultipartForm are assumed to be included in r.URL.
+
+	if r.ContentLength != -1 {
+		s += int(r.ContentLength)
+	}
+	return s
+}
+
+func sanitizeMethod(m string) string {
+	switch m {
+	case "GET", "get":
+		return "get"
+	case "PUT", "put":
+		return "put"
+	case "HEAD", "head":
+		return "head"
+	case "POST", "post":
+		return "post"
+	case "DELETE", "delete":
+		return "delete"
+	case "CONNECT", "connect":
+		return "connect"
+	case "OPTIONS", "options":
+		return "options"
+	case "NOTIFY", "notify":
+		return "notify"
+	default:
+		return strings.ToLower(m)
+	}
+}
+
+// If the wrapped http.Handler has not set a status code, i.e. the value is
+// currently 0, santizeCode will return 200, for consistency with behavior in
+// the stdlib.
+func sanitizeCode(s int) string {
+	switch s {
+	case 100:
+		return "100"
+	case 101:
+		return "101"
+
+	case 200, 0:
+		return "200"
+	case 201:
+		return "201"
+	case 202:
+		return "202"
+	case 203:
+		return "203"
+	case 204:
+		return "204"
+	case 205:
+		return "205"
+	case 206:
+		return "206"
+
+	case 300:
+		return "300"
+	case 301:
+		return "301"
+	case 302:
+		return "302"
+	case 304:
+		return "304"
+	case 305:
+		return "305"
+	case 307:
+		return "307"
+
+	case 400:
+		return "400"
+	case 401:
+		return "401"
+	case 402:
+		return "402"
+	case 403:
+		return "403"
+	case 404:
+		return "404"
+	case 405:
+		return "405"
+	case 406:
+		return "406"
+	case 407:
+		return "407"
+	case 408:
+		return "408"
+	case 409:
+		return "409"
+	case 410:
+		return "410"
+	case 411:
+		return "411"
+	case 412:
+		return "412"
+	case 413:
+		return "413"
+	case 414:
+		return "414"
+	case 415:
+		return "415"
+	case 416:
+		return "416"
+	case 417:
+		return "417"
+	case 418:
+		return "418"
+
+	case 500:
+		return "500"
+	case 501:
+		return "501"
+	case 502:
+		return "502"
+	case 503:
+		return "503"
+	case 504:
+		return "504"
+	case 505:
+		return "505"
+
+	case 428:
+		return "428"
+	case 429:
+		return "429"
+	case 431:
+		return "431"
+	case 511:
+		return "511"
+
+	default:
+		return strconv.Itoa(s)
+	}
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/registry.go b/vendor/github.com/prometheus/client_golang/prometheus/registry.go
new file mode 100644
index 000000000..6c32516aa
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/registry.go
@@ -0,0 +1,945 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sort"
+	"strings"
+	"sync"
+	"unicode/utf8"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/prometheus/common/expfmt"
+
+	dto "github.com/prometheus/client_model/go"
+
+	"github.com/prometheus/client_golang/prometheus/internal"
+)
+
+const (
+	// Capacity for the channel to collect metrics and descriptors.
+	capMetricChan = 1000
+	capDescChan   = 10
+)
+
+// DefaultRegisterer and DefaultGatherer are the implementations of the
+// Registerer and Gatherer interface a number of convenience functions in this
+// package act on. Initially, both variables point to the same Registry, which
+// has a process collector (currently on Linux only, see NewProcessCollector)
+// and a Go collector (see NewGoCollector, in particular the note about
+// stop-the-world implication with Go versions older than 1.9) already
+// registered. This approach to keep default instances as global state mirrors
+// the approach of other packages in the Go standard library. Note that there
+// are caveats. Change the variables with caution and only if you understand the
+// consequences. Users who want to avoid global state altogether should not use
+// the convenience functions and act on custom instances instead.
+var (
+	defaultRegistry              = NewRegistry()
+	DefaultRegisterer Registerer = defaultRegistry
+	DefaultGatherer   Gatherer   = defaultRegistry
+)
+
+func init() {
+	MustRegister(NewProcessCollector(ProcessCollectorOpts{}))
+	MustRegister(NewGoCollector())
+}
+
+// NewRegistry creates a new vanilla Registry without any Collectors
+// pre-registered.
+func NewRegistry() *Registry {
+	return &Registry{
+		collectorsByID:  map[uint64]Collector{},
+		descIDs:         map[uint64]struct{}{},
+		dimHashesByName: map[string]uint64{},
+	}
+}
+
+// NewPedanticRegistry returns a registry that checks during collection if each
+// collected Metric is consistent with its reported Desc, and if the Desc has
+// actually been registered with the registry. Unchecked Collectors (those whose
+// Describe methed does not yield any descriptors) are excluded from the check.
+//
+// Usually, a Registry will be happy as long as the union of all collected
+// Metrics is consistent and valid even if some metrics are not consistent with
+// their own Desc or a Desc provided by their registered Collector. Well-behaved
+// Collectors and Metrics will only provide consistent Descs. This Registry is
+// useful to test the implementation of Collectors and Metrics.
+func NewPedanticRegistry() *Registry {
+	r := NewRegistry()
+	r.pedanticChecksEnabled = true
+	return r
+}
+
+// Registerer is the interface for the part of a registry in charge of
+// registering and unregistering. Users of custom registries should use
+// Registerer as type for registration purposes (rather than the Registry type
+// directly). In that way, they are free to use custom Registerer implementation
+// (e.g. for testing purposes).
+type Registerer interface {
+	// Register registers a new Collector to be included in metrics
+	// collection. It returns an error if the descriptors provided by the
+	// Collector are invalid or if they — in combination with descriptors of
+	// already registered Collectors — do not fulfill the consistency and
+	// uniqueness criteria described in the documentation of metric.Desc.
+	//
+	// If the provided Collector is equal to a Collector already registered
+	// (which includes the case of re-registering the same Collector), the
+	// returned error is an instance of AlreadyRegisteredError, which
+	// contains the previously registered Collector.
+	//
+	// A Collector whose Describe method does not yield any Desc is treated
+	// as unchecked. Registration will always succeed. No check for
+	// re-registering (see previous paragraph) is performed. Thus, the
+	// caller is responsible for not double-registering the same unchecked
+	// Collector, and for providing a Collector that will not cause
+	// inconsistent metrics on collection. (This would lead to scrape
+	// errors.)
+	Register(Collector) error
+	// MustRegister works like Register but registers any number of
+	// Collectors and panics upon the first registration that causes an
+	// error.
+	MustRegister(...Collector)
+	// Unregister unregisters the Collector that equals the Collector passed
+	// in as an argument.  (Two Collectors are considered equal if their
+	// Describe method yields the same set of descriptors.) The function
+	// returns whether a Collector was unregistered. Note that an unchecked
+	// Collector cannot be unregistered (as its Describe method does not
+	// yield any descriptor).
+	//
+	// Note that even after unregistering, it will not be possible to
+	// register a new Collector that is inconsistent with the unregistered
+	// Collector, e.g. a Collector collecting metrics with the same name but
+	// a different help string. The rationale here is that the same registry
+	// instance must only collect consistent metrics throughout its
+	// lifetime.
+	Unregister(Collector) bool
+}
+
+// Gatherer is the interface for the part of a registry in charge of gathering
+// the collected metrics into a number of MetricFamilies. The Gatherer interface
+// comes with the same general implication as described for the Registerer
+// interface.
+type Gatherer interface {
+	// Gather calls the Collect method of the registered Collectors and then
+	// gathers the collected metrics into a lexicographically sorted slice
+	// of uniquely named MetricFamily protobufs. Gather ensures that the
+	// returned slice is valid and self-consistent so that it can be used
+	// for valid exposition. As an exception to the strict consistency
+	// requirements described for metric.Desc, Gather will tolerate
+	// different sets of label names for metrics of the same metric family.
+	//
+	// Even if an error occurs, Gather attempts to gather as many metrics as
+	// possible. Hence, if a non-nil error is returned, the returned
+	// MetricFamily slice could be nil (in case of a fatal error that
+	// prevented any meaningful metric collection) or contain a number of
+	// MetricFamily protobufs, some of which might be incomplete, and some
+	// might be missing altogether. The returned error (which might be a
+	// MultiError) explains the details. Note that this is mostly useful for
+	// debugging purposes. If the gathered protobufs are to be used for
+	// exposition in actual monitoring, it is almost always better to not
+	// expose an incomplete result and instead disregard the returned
+	// MetricFamily protobufs in case the returned error is non-nil.
+	Gather() ([]*dto.MetricFamily, error)
+}
+
+// Register registers the provided Collector with the DefaultRegisterer.
+//
+// Register is a shortcut for DefaultRegisterer.Register(c). See there for more
+// details.
+func Register(c Collector) error {
+	return DefaultRegisterer.Register(c)
+}
+
+// MustRegister registers the provided Collectors with the DefaultRegisterer and
+// panics if any error occurs.
+//
+// MustRegister is a shortcut for DefaultRegisterer.MustRegister(cs...). See
+// there for more details.
+func MustRegister(cs ...Collector) {
+	DefaultRegisterer.MustRegister(cs...)
+}
+
+// Unregister removes the registration of the provided Collector from the
+// DefaultRegisterer.
+//
+// Unregister is a shortcut for DefaultRegisterer.Unregister(c). See there for
+// more details.
+func Unregister(c Collector) bool {
+	return DefaultRegisterer.Unregister(c)
+}
+
+// GathererFunc turns a function into a Gatherer.
+type GathererFunc func() ([]*dto.MetricFamily, error)
+
+// Gather implements Gatherer.
+func (gf GathererFunc) Gather() ([]*dto.MetricFamily, error) {
+	return gf()
+}
+
+// AlreadyRegisteredError is returned by the Register method if the Collector to
+// be registered has already been registered before, or a different Collector
+// that collects the same metrics has been registered before. Registration fails
+// in that case, but you can detect from the kind of error what has
+// happened. The error contains fields for the existing Collector and the
+// (rejected) new Collector that equals the existing one. This can be used to
+// find out if an equal Collector has been registered before and switch over to
+// using the old one, as demonstrated in the example.
+type AlreadyRegisteredError struct {
+	ExistingCollector, NewCollector Collector
+}
+
+func (err AlreadyRegisteredError) Error() string {
+	return "duplicate metrics collector registration attempted"
+}
+
+// MultiError is a slice of errors implementing the error interface. It is used
+// by a Gatherer to report multiple errors during MetricFamily gathering.
+type MultiError []error
+
+func (errs MultiError) Error() string {
+	if len(errs) == 0 {
+		return ""
+	}
+	buf := &bytes.Buffer{}
+	fmt.Fprintf(buf, "%d error(s) occurred:", len(errs))
+	for _, err := range errs {
+		fmt.Fprintf(buf, "\n* %s", err)
+	}
+	return buf.String()
+}
+
+// Append appends the provided error if it is not nil.
+func (errs *MultiError) Append(err error) {
+	if err != nil {
+		*errs = append(*errs, err)
+	}
+}
+
+// MaybeUnwrap returns nil if len(errs) is 0. It returns the first and only
+// contained error as error if len(errs is 1). In all other cases, it returns
+// the MultiError directly. This is helpful for returning a MultiError in a way
+// that only uses the MultiError if needed.
+func (errs MultiError) MaybeUnwrap() error {
+	switch len(errs) {
+	case 0:
+		return nil
+	case 1:
+		return errs[0]
+	default:
+		return errs
+	}
+}
+
+// Registry registers Prometheus collectors, collects their metrics, and gathers
+// them into MetricFamilies for exposition. It implements both Registerer and
+// Gatherer. The zero value is not usable. Create instances with NewRegistry or
+// NewPedanticRegistry.
+type Registry struct {
+	mtx                   sync.RWMutex
+	collectorsByID        map[uint64]Collector // ID is a hash of the descIDs.
+	descIDs               map[uint64]struct{}
+	dimHashesByName       map[string]uint64
+	uncheckedCollectors   []Collector
+	pedanticChecksEnabled bool
+}
+
+// Register implements Registerer.
+func (r *Registry) Register(c Collector) error {
+	var (
+		descChan           = make(chan *Desc, capDescChan)
+		newDescIDs         = map[uint64]struct{}{}
+		newDimHashesByName = map[string]uint64{}
+		collectorID        uint64 // Just a sum of all desc IDs.
+		duplicateDescErr   error
+	)
+	go func() {
+		c.Describe(descChan)
+		close(descChan)
+	}()
+	r.mtx.Lock()
+	defer func() {
+		// Drain channel in case of premature return to not leak a goroutine.
+		for range descChan {
+		}
+		r.mtx.Unlock()
+	}()
+	// Conduct various tests...
+	for desc := range descChan {
+
+		// Is the descriptor valid at all?
+		if desc.err != nil {
+			return fmt.Errorf("descriptor %s is invalid: %s", desc, desc.err)
+		}
+
+		// Is the descID unique?
+		// (In other words: Is the fqName + constLabel combination unique?)
+		if _, exists := r.descIDs[desc.id]; exists {
+			duplicateDescErr = fmt.Errorf("descriptor %s already exists with the same fully-qualified name and const label values", desc)
+		}
+		// If it is not a duplicate desc in this collector, add it to
+		// the collectorID.  (We allow duplicate descs within the same
+		// collector, but their existence must be a no-op.)
+		if _, exists := newDescIDs[desc.id]; !exists {
+			newDescIDs[desc.id] = struct{}{}
+			collectorID += desc.id
+		}
+
+		// Are all the label names and the help string consistent with
+		// previous descriptors of the same name?
+		// First check existing descriptors...
+		if dimHash, exists := r.dimHashesByName[desc.fqName]; exists {
+			if dimHash != desc.dimHash {
+				return fmt.Errorf("a previously registered descriptor with the same fully-qualified name as %s has different label names or a different help string", desc)
+			}
+		} else {
+			// ...then check the new descriptors already seen.
+			if dimHash, exists := newDimHashesByName[desc.fqName]; exists {
+				if dimHash != desc.dimHash {
+					return fmt.Errorf("descriptors reported by collector have inconsistent label names or help strings for the same fully-qualified name, offender is %s", desc)
+				}
+			} else {
+				newDimHashesByName[desc.fqName] = desc.dimHash
+			}
+		}
+	}
+	// A Collector yielding no Desc at all is considered unchecked.
+	if len(newDescIDs) == 0 {
+		r.uncheckedCollectors = append(r.uncheckedCollectors, c)
+		return nil
+	}
+	if existing, exists := r.collectorsByID[collectorID]; exists {
+		switch e := existing.(type) {
+		case *wrappingCollector:
+			return AlreadyRegisteredError{
+				ExistingCollector: e.unwrapRecursively(),
+				NewCollector:      c,
+			}
+		default:
+			return AlreadyRegisteredError{
+				ExistingCollector: e,
+				NewCollector:      c,
+			}
+		}
+	}
+	// If the collectorID is new, but at least one of the descs existed
+	// before, we are in trouble.
+	if duplicateDescErr != nil {
+		return duplicateDescErr
+	}
+
+	// Only after all tests have passed, actually register.
+	r.collectorsByID[collectorID] = c
+	for hash := range newDescIDs {
+		r.descIDs[hash] = struct{}{}
+	}
+	for name, dimHash := range newDimHashesByName {
+		r.dimHashesByName[name] = dimHash
+	}
+	return nil
+}
+
+// Unregister implements Registerer.
+func (r *Registry) Unregister(c Collector) bool {
+	var (
+		descChan    = make(chan *Desc, capDescChan)
+		descIDs     = map[uint64]struct{}{}
+		collectorID uint64 // Just a sum of the desc IDs.
+	)
+	go func() {
+		c.Describe(descChan)
+		close(descChan)
+	}()
+	for desc := range descChan {
+		if _, exists := descIDs[desc.id]; !exists {
+			collectorID += desc.id
+			descIDs[desc.id] = struct{}{}
+		}
+	}
+
+	r.mtx.RLock()
+	if _, exists := r.collectorsByID[collectorID]; !exists {
+		r.mtx.RUnlock()
+		return false
+	}
+	r.mtx.RUnlock()
+
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
+
+	delete(r.collectorsByID, collectorID)
+	for id := range descIDs {
+		delete(r.descIDs, id)
+	}
+	// dimHashesByName is left untouched as those must be consistent
+	// throughout the lifetime of a program.
+	return true
+}
+
+// MustRegister implements Registerer.
+func (r *Registry) MustRegister(cs ...Collector) {
+	for _, c := range cs {
+		if err := r.Register(c); err != nil {
+			panic(err)
+		}
+	}
+}
+
+// Gather implements Gatherer.
+func (r *Registry) Gather() ([]*dto.MetricFamily, error) {
+	var (
+		checkedMetricChan   = make(chan Metric, capMetricChan)
+		uncheckedMetricChan = make(chan Metric, capMetricChan)
+		metricHashes        = map[uint64]struct{}{}
+		wg                  sync.WaitGroup
+		errs                MultiError          // The collected errors to return in the end.
+		registeredDescIDs   map[uint64]struct{} // Only used for pedantic checks
+	)
+
+	r.mtx.RLock()
+	goroutineBudget := len(r.collectorsByID) + len(r.uncheckedCollectors)
+	metricFamiliesByName := make(map[string]*dto.MetricFamily, len(r.dimHashesByName))
+	checkedCollectors := make(chan Collector, len(r.collectorsByID))
+	uncheckedCollectors := make(chan Collector, len(r.uncheckedCollectors))
+	for _, collector := range r.collectorsByID {
+		checkedCollectors <- collector
+	}
+	for _, collector := range r.uncheckedCollectors {
+		uncheckedCollectors <- collector
+	}
+	// In case pedantic checks are enabled, we have to copy the map before
+	// giving up the RLock.
+	if r.pedanticChecksEnabled {
+		registeredDescIDs = make(map[uint64]struct{}, len(r.descIDs))
+		for id := range r.descIDs {
+			registeredDescIDs[id] = struct{}{}
+		}
+	}
+	r.mtx.RUnlock()
+
+	wg.Add(goroutineBudget)
+
+	collectWorker := func() {
+		for {
+			select {
+			case collector := <-checkedCollectors:
+				collector.Collect(checkedMetricChan)
+			case collector := <-uncheckedCollectors:
+				collector.Collect(uncheckedMetricChan)
+			default:
+				return
+			}
+			wg.Done()
+		}
+	}
+
+	// Start the first worker now to make sure at least one is running.
+	go collectWorker()
+	goroutineBudget--
+
+	// Close checkedMetricChan and uncheckedMetricChan once all collectors
+	// are collected.
+	go func() {
+		wg.Wait()
+		close(checkedMetricChan)
+		close(uncheckedMetricChan)
+	}()
+
+	// Drain checkedMetricChan and uncheckedMetricChan in case of premature return.
+	defer func() {
+		if checkedMetricChan != nil {
+			for range checkedMetricChan {
+			}
+		}
+		if uncheckedMetricChan != nil {
+			for range uncheckedMetricChan {
+			}
+		}
+	}()
+
+	// Copy the channel references so we can nil them out later to remove
+	// them from the select statements below.
+	cmc := checkedMetricChan
+	umc := uncheckedMetricChan
+
+	for {
+		select {
+		case metric, ok := <-cmc:
+			if !ok {
+				cmc = nil
+				break
+			}
+			errs.Append(processMetric(
+				metric, metricFamiliesByName,
+				metricHashes,
+				registeredDescIDs,
+			))
+		case metric, ok := <-umc:
+			if !ok {
+				umc = nil
+				break
+			}
+			errs.Append(processMetric(
+				metric, metricFamiliesByName,
+				metricHashes,
+				nil,
+			))
+		default:
+			if goroutineBudget <= 0 || len(checkedCollectors)+len(uncheckedCollectors) == 0 {
+				// All collectors are already being worked on or
+				// we have already as many goroutines started as
+				// there are collectors. Do the same as above,
+				// just without the default.
+				select {
+				case metric, ok := <-cmc:
+					if !ok {
+						cmc = nil
+						break
+					}
+					errs.Append(processMetric(
+						metric, metricFamiliesByName,
+						metricHashes,
+						registeredDescIDs,
+					))
+				case metric, ok := <-umc:
+					if !ok {
+						umc = nil
+						break
+					}
+					errs.Append(processMetric(
+						metric, metricFamiliesByName,
+						metricHashes,
+						nil,
+					))
+				}
+				break
+			}
+			// Start more workers.
+			go collectWorker()
+			goroutineBudget--
+			runtime.Gosched()
+		}
+		// Once both checkedMetricChan and uncheckdMetricChan are closed
+		// and drained, the contraption above will nil out cmc and umc,
+		// and then we can leave the collect loop here.
+		if cmc == nil && umc == nil {
+			break
+		}
+	}
+	return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap()
+}
+
+// WriteToTextfile calls Gather on the provided Gatherer, encodes the result in the
+// Prometheus text format, and writes it to a temporary file. Upon success, the
+// temporary file is renamed to the provided filename.
+//
+// This is intended for use with the textfile collector of the node exporter.
+// Note that the node exporter expects the filename to be suffixed with ".prom".
+func WriteToTextfile(filename string, g Gatherer) error {
+	tmp, err := ioutil.TempFile(filepath.Dir(filename), filepath.Base(filename))
+	if err != nil {
+		return err
+	}
+	defer os.Remove(tmp.Name())
+
+	mfs, err := g.Gather()
+	if err != nil {
+		return err
+	}
+	for _, mf := range mfs {
+		if _, err := expfmt.MetricFamilyToText(tmp, mf); err != nil {
+			return err
+		}
+	}
+	if err := tmp.Close(); err != nil {
+		return err
+	}
+
+	if err := os.Chmod(tmp.Name(), 0644); err != nil {
+		return err
+	}
+	return os.Rename(tmp.Name(), filename)
+}
+
+// processMetric is an internal helper method only used by the Gather method.
+func processMetric(
+	metric Metric,
+	metricFamiliesByName map[string]*dto.MetricFamily,
+	metricHashes map[uint64]struct{},
+	registeredDescIDs map[uint64]struct{},
+) error {
+	desc := metric.Desc()
+	// Wrapped metrics collected by an unchecked Collector can have an
+	// invalid Desc.
+	if desc.err != nil {
+		return desc.err
+	}
+	dtoMetric := &dto.Metric{}
+	if err := metric.Write(dtoMetric); err != nil {
+		return fmt.Errorf("error collecting metric %v: %s", desc, err)
+	}
+	metricFamily, ok := metricFamiliesByName[desc.fqName]
+	if ok { // Existing name.
+		if metricFamily.GetHelp() != desc.help {
+			return fmt.Errorf(
+				"collected metric %s %s has help %q but should have %q",
+				desc.fqName, dtoMetric, desc.help, metricFamily.GetHelp(),
+			)
+		}
+		// TODO(beorn7): Simplify switch once Desc has type.
+		switch metricFamily.GetType() {
+		case dto.MetricType_COUNTER:
+			if dtoMetric.Counter == nil {
+				return fmt.Errorf(
+					"collected metric %s %s should be a Counter",
+					desc.fqName, dtoMetric,
+				)
+			}
+		case dto.MetricType_GAUGE:
+			if dtoMetric.Gauge == nil {
+				return fmt.Errorf(
+					"collected metric %s %s should be a Gauge",
+					desc.fqName, dtoMetric,
+				)
+			}
+		case dto.MetricType_SUMMARY:
+			if dtoMetric.Summary == nil {
+				return fmt.Errorf(
+					"collected metric %s %s should be a Summary",
+					desc.fqName, dtoMetric,
+				)
+			}
+		case dto.MetricType_UNTYPED:
+			if dtoMetric.Untyped == nil {
+				return fmt.Errorf(
+					"collected metric %s %s should be Untyped",
+					desc.fqName, dtoMetric,
+				)
+			}
+		case dto.MetricType_HISTOGRAM:
+			if dtoMetric.Histogram == nil {
+				return fmt.Errorf(
+					"collected metric %s %s should be a Histogram",
+					desc.fqName, dtoMetric,
+				)
+			}
+		default:
+			panic("encountered MetricFamily with invalid type")
+		}
+	} else { // New name.
+		metricFamily = &dto.MetricFamily{}
+		metricFamily.Name = proto.String(desc.fqName)
+		metricFamily.Help = proto.String(desc.help)
+		// TODO(beorn7): Simplify switch once Desc has type.
+		switch {
+		case dtoMetric.Gauge != nil:
+			metricFamily.Type = dto.MetricType_GAUGE.Enum()
+		case dtoMetric.Counter != nil:
+			metricFamily.Type = dto.MetricType_COUNTER.Enum()
+		case dtoMetric.Summary != nil:
+			metricFamily.Type = dto.MetricType_SUMMARY.Enum()
+		case dtoMetric.Untyped != nil:
+			metricFamily.Type = dto.MetricType_UNTYPED.Enum()
+		case dtoMetric.Histogram != nil:
+			metricFamily.Type = dto.MetricType_HISTOGRAM.Enum()
+		default:
+			return fmt.Errorf("empty metric collected: %s", dtoMetric)
+		}
+		if err := checkSuffixCollisions(metricFamily, metricFamiliesByName); err != nil {
+			return err
+		}
+		metricFamiliesByName[desc.fqName] = metricFamily
+	}
+	if err := checkMetricConsistency(metricFamily, dtoMetric, metricHashes); err != nil {
+		return err
+	}
+	if registeredDescIDs != nil {
+		// Is the desc registered at all?
+		if _, exist := registeredDescIDs[desc.id]; !exist {
+			return fmt.Errorf(
+				"collected metric %s %s with unregistered descriptor %s",
+				metricFamily.GetName(), dtoMetric, desc,
+			)
+		}
+		if err := checkDescConsistency(metricFamily, dtoMetric, desc); err != nil {
+			return err
+		}
+	}
+	metricFamily.Metric = append(metricFamily.Metric, dtoMetric)
+	return nil
+}
+
+// Gatherers is a slice of Gatherer instances that implements the Gatherer
+// interface itself. Its Gather method calls Gather on all Gatherers in the
+// slice in order and returns the merged results. Errors returned from the
+// Gather calls are all returned in a flattened MultiError. Duplicate and
+// inconsistent Metrics are skipped (first occurrence in slice order wins) and
+// reported in the returned error.
+//
+// Gatherers can be used to merge the Gather results from multiple
+// Registries. It also provides a way to directly inject existing MetricFamily
+// protobufs into the gathering by creating a custom Gatherer with a Gather
+// method that simply returns the existing MetricFamily protobufs. Note that no
+// registration is involved (in contrast to Collector registration), so
+// obviously registration-time checks cannot happen. Any inconsistencies between
+// the gathered MetricFamilies are reported as errors by the Gather method, and
+// inconsistent Metrics are dropped. Invalid parts of the MetricFamilies
+// (e.g. syntactically invalid metric or label names) will go undetected.
+type Gatherers []Gatherer
+
+// Gather implements Gatherer.
+func (gs Gatherers) Gather() ([]*dto.MetricFamily, error) {
+	var (
+		metricFamiliesByName = map[string]*dto.MetricFamily{}
+		metricHashes         = map[uint64]struct{}{}
+		errs                 MultiError // The collected errors to return in the end.
+	)
+
+	for i, g := range gs {
+		mfs, err := g.Gather()
+		if err != nil {
+			if multiErr, ok := err.(MultiError); ok {
+				for _, err := range multiErr {
+					errs = append(errs, fmt.Errorf("[from Gatherer #%d] %s", i+1, err))
+				}
+			} else {
+				errs = append(errs, fmt.Errorf("[from Gatherer #%d] %s", i+1, err))
+			}
+		}
+		for _, mf := range mfs {
+			existingMF, exists := metricFamiliesByName[mf.GetName()]
+			if exists {
+				if existingMF.GetHelp() != mf.GetHelp() {
+					errs = append(errs, fmt.Errorf(
+						"gathered metric family %s has help %q but should have %q",
+						mf.GetName(), mf.GetHelp(), existingMF.GetHelp(),
+					))
+					continue
+				}
+				if existingMF.GetType() != mf.GetType() {
+					errs = append(errs, fmt.Errorf(
+						"gathered metric family %s has type %s but should have %s",
+						mf.GetName(), mf.GetType(), existingMF.GetType(),
+					))
+					continue
+				}
+			} else {
+				existingMF = &dto.MetricFamily{}
+				existingMF.Name = mf.Name
+				existingMF.Help = mf.Help
+				existingMF.Type = mf.Type
+				if err := checkSuffixCollisions(existingMF, metricFamiliesByName); err != nil {
+					errs = append(errs, err)
+					continue
+				}
+				metricFamiliesByName[mf.GetName()] = existingMF
+			}
+			for _, m := range mf.Metric {
+				if err := checkMetricConsistency(existingMF, m, metricHashes); err != nil {
+					errs = append(errs, err)
+					continue
+				}
+				existingMF.Metric = append(existingMF.Metric, m)
+			}
+		}
+	}
+	return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap()
+}
+
+// checkSuffixCollisions checks for collisions with the “magic” suffixes the
+// Prometheus text format and the internal metric representation of the
+// Prometheus server add while flattening Summaries and Histograms.
+func checkSuffixCollisions(mf *dto.MetricFamily, mfs map[string]*dto.MetricFamily) error {
+	var (
+		newName              = mf.GetName()
+		newType              = mf.GetType()
+		newNameWithoutSuffix = ""
+	)
+	switch {
+	case strings.HasSuffix(newName, "_count"):
+		newNameWithoutSuffix = newName[:len(newName)-6]
+	case strings.HasSuffix(newName, "_sum"):
+		newNameWithoutSuffix = newName[:len(newName)-4]
+	case strings.HasSuffix(newName, "_bucket"):
+		newNameWithoutSuffix = newName[:len(newName)-7]
+	}
+	if newNameWithoutSuffix != "" {
+		if existingMF, ok := mfs[newNameWithoutSuffix]; ok {
+			switch existingMF.GetType() {
+			case dto.MetricType_SUMMARY:
+				if !strings.HasSuffix(newName, "_bucket") {
+					return fmt.Errorf(
+						"collected metric named %q collides with previously collected summary named %q",
+						newName, newNameWithoutSuffix,
+					)
+				}
+			case dto.MetricType_HISTOGRAM:
+				return fmt.Errorf(
+					"collected metric named %q collides with previously collected histogram named %q",
+					newName, newNameWithoutSuffix,
+				)
+			}
+		}
+	}
+	if newType == dto.MetricType_SUMMARY || newType == dto.MetricType_HISTOGRAM {
+		if _, ok := mfs[newName+"_count"]; ok {
+			return fmt.Errorf(
+				"collected histogram or summary named %q collides with previously collected metric named %q",
+				newName, newName+"_count",
+			)
+		}
+		if _, ok := mfs[newName+"_sum"]; ok {
+			return fmt.Errorf(
+				"collected histogram or summary named %q collides with previously collected metric named %q",
+				newName, newName+"_sum",
+			)
+		}
+	}
+	if newType == dto.MetricType_HISTOGRAM {
+		if _, ok := mfs[newName+"_bucket"]; ok {
+			return fmt.Errorf(
+				"collected histogram named %q collides with previously collected metric named %q",
+				newName, newName+"_bucket",
+			)
+		}
+	}
+	return nil
+}
+
+// checkMetricConsistency checks if the provided Metric is consistent with the
+// provided MetricFamily. It also hashes the Metric labels and the MetricFamily
+// name. If the resulting hash is already in the provided metricHashes, an error
+// is returned. If not, it is added to metricHashes.
+func checkMetricConsistency(
+	metricFamily *dto.MetricFamily,
+	dtoMetric *dto.Metric,
+	metricHashes map[uint64]struct{},
+) error {
+	name := metricFamily.GetName()
+
+	// Type consistency with metric family.
+	if metricFamily.GetType() == dto.MetricType_GAUGE && dtoMetric.Gauge == nil ||
+		metricFamily.GetType() == dto.MetricType_COUNTER && dtoMetric.Counter == nil ||
+		metricFamily.GetType() == dto.MetricType_SUMMARY && dtoMetric.Summary == nil ||
+		metricFamily.GetType() == dto.MetricType_HISTOGRAM && dtoMetric.Histogram == nil ||
+		metricFamily.GetType() == dto.MetricType_UNTYPED && dtoMetric.Untyped == nil {
+		return fmt.Errorf(
+			"collected metric %q { %s} is not a %s",
+			name, dtoMetric, metricFamily.GetType(),
+		)
+	}
+
+	previousLabelName := ""
+	for _, labelPair := range dtoMetric.GetLabel() {
+		labelName := labelPair.GetName()
+		if labelName == previousLabelName {
+			return fmt.Errorf(
+				"collected metric %q { %s} has two or more labels with the same name: %s",
+				name, dtoMetric, labelName,
+			)
+		}
+		if !checkLabelName(labelName) {
+			return fmt.Errorf(
+				"collected metric %q { %s} has a label with an invalid name: %s",
+				name, dtoMetric, labelName,
+			)
+		}
+		if dtoMetric.Summary != nil && labelName == quantileLabel {
+			return fmt.Errorf(
+				"collected metric %q { %s} must not have an explicit %q label",
+				name, dtoMetric, quantileLabel,
+			)
+		}
+		if !utf8.ValidString(labelPair.GetValue()) {
+			return fmt.Errorf(
+				"collected metric %q { %s} has a label named %q whose value is not utf8: %#v",
+				name, dtoMetric, labelName, labelPair.GetValue())
+		}
+		previousLabelName = labelName
+	}
+
+	// Is the metric unique (i.e. no other metric with the same name and the same labels)?
+	h := hashNew()
+	h = hashAdd(h, name)
+	h = hashAddByte(h, separatorByte)
+	// Make sure label pairs are sorted. We depend on it for the consistency
+	// check.
+	if !sort.IsSorted(labelPairSorter(dtoMetric.Label)) {
+		// We cannot sort dtoMetric.Label in place as it is immutable by contract.
+		copiedLabels := make([]*dto.LabelPair, len(dtoMetric.Label))
+		copy(copiedLabels, dtoMetric.Label)
+		sort.Sort(labelPairSorter(copiedLabels))
+		dtoMetric.Label = copiedLabels
+	}
+	for _, lp := range dtoMetric.Label {
+		h = hashAdd(h, lp.GetName())
+		h = hashAddByte(h, separatorByte)
+		h = hashAdd(h, lp.GetValue())
+		h = hashAddByte(h, separatorByte)
+	}
+	if _, exists := metricHashes[h]; exists {
+		return fmt.Errorf(
+			"collected metric %q { %s} was collected before with the same name and label values",
+			name, dtoMetric,
+		)
+	}
+	metricHashes[h] = struct{}{}
+	return nil
+}
+
+func checkDescConsistency(
+	metricFamily *dto.MetricFamily,
+	dtoMetric *dto.Metric,
+	desc *Desc,
+) error {
+	// Desc help consistency with metric family help.
+	if metricFamily.GetHelp() != desc.help {
+		return fmt.Errorf(
+			"collected metric %s %s has help %q but should have %q",
+			metricFamily.GetName(), dtoMetric, metricFamily.GetHelp(), desc.help,
+		)
+	}
+
+	// Is the desc consistent with the content of the metric?
+	lpsFromDesc := make([]*dto.LabelPair, len(desc.constLabelPairs), len(dtoMetric.Label))
+	copy(lpsFromDesc, desc.constLabelPairs)
+	for _, l := range desc.variableLabels {
+		lpsFromDesc = append(lpsFromDesc, &dto.LabelPair{
+			Name: proto.String(l),
+		})
+	}
+	if len(lpsFromDesc) != len(dtoMetric.Label) {
+		return fmt.Errorf(
+			"labels in collected metric %s %s are inconsistent with descriptor %s",
+			metricFamily.GetName(), dtoMetric, desc,
+		)
+	}
+	sort.Sort(labelPairSorter(lpsFromDesc))
+	for i, lpFromDesc := range lpsFromDesc {
+		lpFromMetric := dtoMetric.Label[i]
+		if lpFromDesc.GetName() != lpFromMetric.GetName() ||
+			lpFromDesc.Value != nil && lpFromDesc.GetValue() != lpFromMetric.GetValue() {
+			return fmt.Errorf(
+				"labels in collected metric %s %s are inconsistent with descriptor %s",
+				metricFamily.GetName(), dtoMetric, desc,
+			)
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/summary.go b/vendor/github.com/prometheus/client_golang/prometheus/summary.go
new file mode 100644
index 000000000..c970fdee0
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/summary.go
@@ -0,0 +1,736 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"fmt"
+	"math"
+	"runtime"
+	"sort"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/beorn7/perks/quantile"
+	"github.com/golang/protobuf/proto"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// quantileLabel is used for the label that defines the quantile in a
+// summary.
+const quantileLabel = "quantile"
+
+// A Summary captures individual observations from an event or sample stream and
+// summarizes them in a manner similar to traditional summary statistics: 1. sum
+// of observations, 2. observation count, 3. rank estimations.
+//
+// A typical use-case is the observation of request latencies. By default, a
+// Summary provides the median, the 90th and the 99th percentile of the latency
+// as rank estimations. However, the default behavior will change in the
+// upcoming v1.0.0 of the library. There will be no rank estimations at all by
+// default. For a sane transition, it is recommended to set the desired rank
+// estimations explicitly.
+//
+// Note that the rank estimations cannot be aggregated in a meaningful way with
+// the Prometheus query language (i.e. you cannot average or add them). If you
+// need aggregatable quantiles (e.g. you want the 99th percentile latency of all
+// queries served across all instances of a service), consider the Histogram
+// metric type. See the Prometheus documentation for more details.
+//
+// To create Summary instances, use NewSummary.
+type Summary interface {
+	Metric
+	Collector
+
+	// Observe adds a single observation to the summary.
+	Observe(float64)
+}
+
+var errQuantileLabelNotAllowed = fmt.Errorf(
+	"%q is not allowed as label name in summaries", quantileLabel,
+)
+
+// Default values for SummaryOpts.
+const (
+	// DefMaxAge is the default duration for which observations stay
+	// relevant.
+	DefMaxAge time.Duration = 10 * time.Minute
+	// DefAgeBuckets is the default number of buckets used to calculate the
+	// age of observations.
+	DefAgeBuckets = 5
+	// DefBufCap is the standard buffer size for collecting Summary observations.
+	DefBufCap = 500
+)
+
+// SummaryOpts bundles the options for creating a Summary metric. It is
+// mandatory to set Name to a non-empty string. While all other fields are
+// optional and can safely be left at their zero value, it is recommended to set
+// a help string and to explicitly set the Objectives field to the desired value
+// as the default value will change in the upcoming v1.0.0 of the library.
+type SummaryOpts struct {
+	// Namespace, Subsystem, and Name are components of the fully-qualified
+	// name of the Summary (created by joining these components with
+	// "_"). Only Name is mandatory, the others merely help structuring the
+	// name. Note that the fully-qualified name of the Summary must be a
+	// valid Prometheus metric name.
+	Namespace string
+	Subsystem string
+	Name      string
+
+	// Help provides information about this Summary.
+	//
+	// Metrics with the same fully-qualified name must have the same Help
+	// string.
+	Help string
+
+	// ConstLabels are used to attach fixed labels to this metric. Metrics
+	// with the same fully-qualified name must have the same label names in
+	// their ConstLabels.
+	//
+	// Due to the way a Summary is represented in the Prometheus text format
+	// and how it is handled by the Prometheus server internally, “quantile”
+	// is an illegal label name. Construction of a Summary or SummaryVec
+	// will panic if this label name is used in ConstLabels.
+	//
+	// ConstLabels are only used rarely. In particular, do not use them to
+	// attach the same labels to all your metrics. Those use cases are
+	// better covered by target labels set by the scraping Prometheus
+	// server, or by one specific metric (e.g. a build_info or a
+	// machine_role metric). See also
+	// https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels,-not-static-scraped-labels
+	ConstLabels Labels
+
+	// Objectives defines the quantile rank estimates with their respective
+	// absolute error. If Objectives[q] = e, then the value reported for q
+	// will be the φ-quantile value for some φ between q-e and q+e.  The
+	// default value is an empty map, resulting in a summary without
+	// quantiles.
+	Objectives map[float64]float64
+
+	// MaxAge defines the duration for which an observation stays relevant
+	// for the summary. Must be positive. The default value is DefMaxAge.
+	MaxAge time.Duration
+
+	// AgeBuckets is the number of buckets used to exclude observations that
+	// are older than MaxAge from the summary. A higher number has a
+	// resource penalty, so only increase it if the higher resolution is
+	// really required. For very high observation rates, you might want to
+	// reduce the number of age buckets. With only one age bucket, you will
+	// effectively see a complete reset of the summary each time MaxAge has
+	// passed. The default value is DefAgeBuckets.
+	AgeBuckets uint32
+
+	// BufCap defines the default sample stream buffer size.  The default
+	// value of DefBufCap should suffice for most uses. If there is a need
+	// to increase the value, a multiple of 500 is recommended (because that
+	// is the internal buffer size of the underlying package
+	// "github.com/bmizerany/perks/quantile").
+	BufCap uint32
+}
+
+// Problem with the sliding-window decay algorithm... The Merge method of
+// perk/quantile is actually not working as advertised - and it might be
+// unfixable, as the underlying algorithm is apparently not capable of merging
+// summaries in the first place. To avoid using Merge, we are currently adding
+// observations to _each_ age bucket, i.e. the effort to add a sample is
+// essentially multiplied by the number of age buckets. When rotating age
+// buckets, we empty the previous head stream. On scrape time, we simply take
+// the quantiles from the head stream (no merging required). Result: More effort
+// on observation time, less effort on scrape time, which is exactly the
+// opposite of what we try to accomplish, but at least the results are correct.
+//
+// The quite elegant previous contraption to merge the age buckets efficiently
+// on scrape time (see code up commit 6b9530d72ea715f0ba612c0120e6e09fbf1d49d0)
+// can't be used anymore.
+
+// NewSummary creates a new Summary based on the provided SummaryOpts.
+func NewSummary(opts SummaryOpts) Summary {
+	return newSummary(
+		NewDesc(
+			BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+			opts.Help,
+			nil,
+			opts.ConstLabels,
+		),
+		opts,
+	)
+}
+
+func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
+	if len(desc.variableLabels) != len(labelValues) {
+		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues))
+	}
+
+	for _, n := range desc.variableLabels {
+		if n == quantileLabel {
+			panic(errQuantileLabelNotAllowed)
+		}
+	}
+	for _, lp := range desc.constLabelPairs {
+		if lp.GetName() == quantileLabel {
+			panic(errQuantileLabelNotAllowed)
+		}
+	}
+
+	if opts.Objectives == nil {
+		opts.Objectives = map[float64]float64{}
+	}
+
+	if opts.MaxAge < 0 {
+		panic(fmt.Errorf("illegal max age MaxAge=%v", opts.MaxAge))
+	}
+	if opts.MaxAge == 0 {
+		opts.MaxAge = DefMaxAge
+	}
+
+	if opts.AgeBuckets == 0 {
+		opts.AgeBuckets = DefAgeBuckets
+	}
+
+	if opts.BufCap == 0 {
+		opts.BufCap = DefBufCap
+	}
+
+	if len(opts.Objectives) == 0 {
+		// Use the lock-free implementation of a Summary without objectives.
+		s := &noObjectivesSummary{
+			desc:       desc,
+			labelPairs: makeLabelPairs(desc, labelValues),
+			counts:     [2]*summaryCounts{&summaryCounts{}, &summaryCounts{}},
+		}
+		s.init(s) // Init self-collection.
+		return s
+	}
+
+	s := &summary{
+		desc: desc,
+
+		objectives:       opts.Objectives,
+		sortedObjectives: make([]float64, 0, len(opts.Objectives)),
+
+		labelPairs: makeLabelPairs(desc, labelValues),
+
+		hotBuf:         make([]float64, 0, opts.BufCap),
+		coldBuf:        make([]float64, 0, opts.BufCap),
+		streamDuration: opts.MaxAge / time.Duration(opts.AgeBuckets),
+	}
+	s.headStreamExpTime = time.Now().Add(s.streamDuration)
+	s.hotBufExpTime = s.headStreamExpTime
+
+	for i := uint32(0); i < opts.AgeBuckets; i++ {
+		s.streams = append(s.streams, s.newStream())
+	}
+	s.headStream = s.streams[0]
+
+	for qu := range s.objectives {
+		s.sortedObjectives = append(s.sortedObjectives, qu)
+	}
+	sort.Float64s(s.sortedObjectives)
+
+	s.init(s) // Init self-collection.
+	return s
+}
+
+type summary struct {
+	selfCollector
+
+	bufMtx sync.Mutex // Protects hotBuf and hotBufExpTime.
+	mtx    sync.Mutex // Protects every other moving part.
+	// Lock bufMtx before mtx if both are needed.
+
+	desc *Desc
+
+	objectives       map[float64]float64
+	sortedObjectives []float64
+
+	labelPairs []*dto.LabelPair
+
+	sum float64
+	cnt uint64
+
+	hotBuf, coldBuf []float64
+
+	streams                          []*quantile.Stream
+	streamDuration                   time.Duration
+	headStream                       *quantile.Stream
+	headStreamIdx                    int
+	headStreamExpTime, hotBufExpTime time.Time
+}
+
+func (s *summary) Desc() *Desc {
+	return s.desc
+}
+
+func (s *summary) Observe(v float64) {
+	s.bufMtx.Lock()
+	defer s.bufMtx.Unlock()
+
+	now := time.Now()
+	if now.After(s.hotBufExpTime) {
+		s.asyncFlush(now)
+	}
+	s.hotBuf = append(s.hotBuf, v)
+	if len(s.hotBuf) == cap(s.hotBuf) {
+		s.asyncFlush(now)
+	}
+}
+
+func (s *summary) Write(out *dto.Metric) error {
+	sum := &dto.Summary{}
+	qs := make([]*dto.Quantile, 0, len(s.objectives))
+
+	s.bufMtx.Lock()
+	s.mtx.Lock()
+	// Swap bufs even if hotBuf is empty to set new hotBufExpTime.
+	s.swapBufs(time.Now())
+	s.bufMtx.Unlock()
+
+	s.flushColdBuf()
+	sum.SampleCount = proto.Uint64(s.cnt)
+	sum.SampleSum = proto.Float64(s.sum)
+
+	for _, rank := range s.sortedObjectives {
+		var q float64
+		if s.headStream.Count() == 0 {
+			q = math.NaN()
+		} else {
+			q = s.headStream.Query(rank)
+		}
+		qs = append(qs, &dto.Quantile{
+			Quantile: proto.Float64(rank),
+			Value:    proto.Float64(q),
+		})
+	}
+
+	s.mtx.Unlock()
+
+	if len(qs) > 0 {
+		sort.Sort(quantSort(qs))
+	}
+	sum.Quantile = qs
+
+	out.Summary = sum
+	out.Label = s.labelPairs
+	return nil
+}
+
+func (s *summary) newStream() *quantile.Stream {
+	return quantile.NewTargeted(s.objectives)
+}
+
+// asyncFlush needs bufMtx locked.
+func (s *summary) asyncFlush(now time.Time) {
+	s.mtx.Lock()
+	s.swapBufs(now)
+
+	// Unblock the original goroutine that was responsible for the mutation
+	// that triggered the compaction.  But hold onto the global non-buffer
+	// state mutex until the operation finishes.
+	go func() {
+		s.flushColdBuf()
+		s.mtx.Unlock()
+	}()
+}
+
+// rotateStreams needs mtx AND bufMtx locked.
+func (s *summary) maybeRotateStreams() {
+	for !s.hotBufExpTime.Equal(s.headStreamExpTime) {
+		s.headStream.Reset()
+		s.headStreamIdx++
+		if s.headStreamIdx >= len(s.streams) {
+			s.headStreamIdx = 0
+		}
+		s.headStream = s.streams[s.headStreamIdx]
+		s.headStreamExpTime = s.headStreamExpTime.Add(s.streamDuration)
+	}
+}
+
+// flushColdBuf needs mtx locked.
+func (s *summary) flushColdBuf() {
+	for _, v := range s.coldBuf {
+		for _, stream := range s.streams {
+			stream.Insert(v)
+		}
+		s.cnt++
+		s.sum += v
+	}
+	s.coldBuf = s.coldBuf[0:0]
+	s.maybeRotateStreams()
+}
+
+// swapBufs needs mtx AND bufMtx locked, coldBuf must be empty.
+func (s *summary) swapBufs(now time.Time) {
+	if len(s.coldBuf) != 0 {
+		panic("coldBuf is not empty")
+	}
+	s.hotBuf, s.coldBuf = s.coldBuf, s.hotBuf
+	// hotBuf is now empty and gets new expiration set.
+	for now.After(s.hotBufExpTime) {
+		s.hotBufExpTime = s.hotBufExpTime.Add(s.streamDuration)
+	}
+}
+
+type summaryCounts struct {
+	// sumBits contains the bits of the float64 representing the sum of all
+	// observations. sumBits and count have to go first in the struct to
+	// guarantee alignment for atomic operations.
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	sumBits uint64
+	count   uint64
+}
+
+type noObjectivesSummary struct {
+	// countAndHotIdx enables lock-free writes with use of atomic updates.
+	// The most significant bit is the hot index [0 or 1] of the count field
+	// below. Observe calls update the hot one. All remaining bits count the
+	// number of Observe calls. Observe starts by incrementing this counter,
+	// and finish by incrementing the count field in the respective
+	// summaryCounts, as a marker for completion.
+	//
+	// Calls of the Write method (which are non-mutating reads from the
+	// perspective of the summary) swap the hot–cold under the writeMtx
+	// lock. A cooldown is awaited (while locked) by comparing the number of
+	// observations with the initiation count. Once they match, then the
+	// last observation on the now cool one has completed. All cool fields must
+	// be merged into the new hot before releasing writeMtx.
+
+	// Fields with atomic access first! See alignment constraint:
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG
+	countAndHotIdx uint64
+
+	selfCollector
+	desc     *Desc
+	writeMtx sync.Mutex // Only used in the Write method.
+
+	// Two counts, one is "hot" for lock-free observations, the other is
+	// "cold" for writing out a dto.Metric. It has to be an array of
+	// pointers to guarantee 64bit alignment of the histogramCounts, see
+	// http://golang.org/pkg/sync/atomic/#pkg-note-BUG.
+	counts [2]*summaryCounts
+
+	labelPairs []*dto.LabelPair
+}
+
+func (s *noObjectivesSummary) Desc() *Desc {
+	return s.desc
+}
+
+func (s *noObjectivesSummary) Observe(v float64) {
+	// We increment h.countAndHotIdx so that the counter in the lower
+	// 63 bits gets incremented. At the same time, we get the new value
+	// back, which we can use to find the currently-hot counts.
+	n := atomic.AddUint64(&s.countAndHotIdx, 1)
+	hotCounts := s.counts[n>>63]
+
+	for {
+		oldBits := atomic.LoadUint64(&hotCounts.sumBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + v)
+		if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) {
+			break
+		}
+	}
+	// Increment count last as we take it as a signal that the observation
+	// is complete.
+	atomic.AddUint64(&hotCounts.count, 1)
+}
+
+func (s *noObjectivesSummary) Write(out *dto.Metric) error {
+	// For simplicity, we protect this whole method by a mutex. It is not in
+	// the hot path, i.e. Observe is called much more often than Write. The
+	// complication of making Write lock-free isn't worth it, if possible at
+	// all.
+	s.writeMtx.Lock()
+	defer s.writeMtx.Unlock()
+
+	// Adding 1<<63 switches the hot index (from 0 to 1 or from 1 to 0)
+	// without touching the count bits. See the struct comments for a full
+	// description of the algorithm.
+	n := atomic.AddUint64(&s.countAndHotIdx, 1<<63)
+	// count is contained unchanged in the lower 63 bits.
+	count := n & ((1 << 63) - 1)
+	// The most significant bit tells us which counts is hot. The complement
+	// is thus the cold one.
+	hotCounts := s.counts[n>>63]
+	coldCounts := s.counts[(^n)>>63]
+
+	// Await cooldown.
+	for count != atomic.LoadUint64(&coldCounts.count) {
+		runtime.Gosched() // Let observations get work done.
+	}
+
+	sum := &dto.Summary{
+		SampleCount: proto.Uint64(count),
+		SampleSum:   proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))),
+	}
+
+	out.Summary = sum
+	out.Label = s.labelPairs
+
+	// Finally add all the cold counts to the new hot counts and reset the cold counts.
+	atomic.AddUint64(&hotCounts.count, count)
+	atomic.StoreUint64(&coldCounts.count, 0)
+	for {
+		oldBits := atomic.LoadUint64(&hotCounts.sumBits)
+		newBits := math.Float64bits(math.Float64frombits(oldBits) + sum.GetSampleSum())
+		if atomic.CompareAndSwapUint64(&hotCounts.sumBits, oldBits, newBits) {
+			atomic.StoreUint64(&coldCounts.sumBits, 0)
+			break
+		}
+	}
+	return nil
+}
+
+type quantSort []*dto.Quantile
+
+func (s quantSort) Len() int {
+	return len(s)
+}
+
+func (s quantSort) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+func (s quantSort) Less(i, j int) bool {
+	return s[i].GetQuantile() < s[j].GetQuantile()
+}
+
+// SummaryVec is a Collector that bundles a set of Summaries that all share the
+// same Desc, but have different values for their variable labels. This is used
+// if you want to count the same thing partitioned by various dimensions
+// (e.g. HTTP request latencies, partitioned by status code and method). Create
+// instances with NewSummaryVec.
+type SummaryVec struct {
+	*metricVec
+}
+
+// NewSummaryVec creates a new SummaryVec based on the provided SummaryOpts and
+// partitioned by the given label names.
+//
+// Due to the way a Summary is represented in the Prometheus text format and how
+// it is handled by the Prometheus server internally, “quantile” is an illegal
+// label name. NewSummaryVec will panic if this label name is used.
+func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec {
+	for _, ln := range labelNames {
+		if ln == quantileLabel {
+			panic(errQuantileLabelNotAllowed)
+		}
+	}
+	desc := NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		labelNames,
+		opts.ConstLabels,
+	)
+	return &SummaryVec{
+		metricVec: newMetricVec(desc, func(lvs ...string) Metric {
+			return newSummary(desc, opts, lvs...)
+		}),
+	}
+}
+
+// GetMetricWithLabelValues returns the Summary for the given slice of label
+// values (same order as the VariableLabels in Desc). If that combination of
+// label values is accessed for the first time, a new Summary is created.
+//
+// It is possible to call this method without using the returned Summary to only
+// create the new Summary but leave it at its starting value, a Summary without
+// any observations.
+//
+// Keeping the Summary for later use is possible (and should be considered if
+// performance is critical), but keep in mind that Reset, DeleteLabelValues and
+// Delete can be used to delete the Summary from the SummaryVec. In that case,
+// the Summary will still exist, but it will not be exported anymore, even if a
+// Summary with the same label values is created later. See also the CounterVec
+// example.
+//
+// An error is returned if the number of label values is not the same as the
+// number of VariableLabels in Desc (minus any curried labels).
+//
+// Note that for more than one label value, this method is prone to mistakes
+// caused by an incorrect order of arguments. Consider GetMetricWith(Labels) as
+// an alternative to avoid that type of mistake. For higher label numbers, the
+// latter has a much more readable (albeit more verbose) syntax, but it comes
+// with a performance overhead (for creating and processing the Labels map).
+// See also the GaugeVec example.
+func (v *SummaryVec) GetMetricWithLabelValues(lvs ...string) (Observer, error) {
+	metric, err := v.metricVec.getMetricWithLabelValues(lvs...)
+	if metric != nil {
+		return metric.(Observer), err
+	}
+	return nil, err
+}
+
+// GetMetricWith returns the Summary for the given Labels map (the label names
+// must match those of the VariableLabels in Desc). If that label map is
+// accessed for the first time, a new Summary is created. Implications of
+// creating a Summary without using it and keeping the Summary for later use are
+// the same as for GetMetricWithLabelValues.
+//
+// An error is returned if the number and names of the Labels are inconsistent
+// with those of the VariableLabels in Desc (minus any curried labels).
+//
+// This method is used for the same purpose as
+// GetMetricWithLabelValues(...string). See there for pros and cons of the two
+// methods.
+func (v *SummaryVec) GetMetricWith(labels Labels) (Observer, error) {
+	metric, err := v.metricVec.getMetricWith(labels)
+	if metric != nil {
+		return metric.(Observer), err
+	}
+	return nil, err
+}
+
+// WithLabelValues works as GetMetricWithLabelValues, but panics where
+// GetMetricWithLabelValues would have returned an error. Not returning an
+// error allows shortcuts like
+//     myVec.WithLabelValues("404", "GET").Observe(42.21)
+func (v *SummaryVec) WithLabelValues(lvs ...string) Observer {
+	s, err := v.GetMetricWithLabelValues(lvs...)
+	if err != nil {
+		panic(err)
+	}
+	return s
+}
+
+// With works as GetMetricWith, but panics where GetMetricWithLabels would have
+// returned an error. Not returning an error allows shortcuts like
+//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21)
+func (v *SummaryVec) With(labels Labels) Observer {
+	s, err := v.GetMetricWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return s
+}
+
+// CurryWith returns a vector curried with the provided labels, i.e. the
+// returned vector has those labels pre-set for all labeled operations performed
+// on it. The cardinality of the curried vector is reduced accordingly. The
+// order of the remaining labels stays the same (just with the curried labels
+// taken out of the sequence – which is relevant for the
+// (GetMetric)WithLabelValues methods). It is possible to curry a curried
+// vector, but only with labels not yet used for currying before.
+//
+// The metrics contained in the SummaryVec are shared between the curried and
+// uncurried vectors. They are just accessed differently. Curried and uncurried
+// vectors behave identically in terms of collection. Only one must be
+// registered with a given registry (usually the uncurried version). The Reset
+// method deletes all metrics, even if called on a curried vector.
+func (v *SummaryVec) CurryWith(labels Labels) (ObserverVec, error) {
+	vec, err := v.curryWith(labels)
+	if vec != nil {
+		return &SummaryVec{vec}, err
+	}
+	return nil, err
+}
+
+// MustCurryWith works as CurryWith but panics where CurryWith would have
+// returned an error.
+func (v *SummaryVec) MustCurryWith(labels Labels) ObserverVec {
+	vec, err := v.CurryWith(labels)
+	if err != nil {
+		panic(err)
+	}
+	return vec
+}
+
+type constSummary struct {
+	desc       *Desc
+	count      uint64
+	sum        float64
+	quantiles  map[float64]float64
+	labelPairs []*dto.LabelPair
+}
+
+func (s *constSummary) Desc() *Desc {
+	return s.desc
+}
+
+func (s *constSummary) Write(out *dto.Metric) error {
+	sum := &dto.Summary{}
+	qs := make([]*dto.Quantile, 0, len(s.quantiles))
+
+	sum.SampleCount = proto.Uint64(s.count)
+	sum.SampleSum = proto.Float64(s.sum)
+
+	for rank, q := range s.quantiles {
+		qs = append(qs, &dto.Quantile{
+			Quantile: proto.Float64(rank),
+			Value:    proto.Float64(q),
+		})
+	}
+
+	if len(qs) > 0 {
+		sort.Sort(quantSort(qs))
+	}
+	sum.Quantile = qs
+
+	out.Summary = sum
+	out.Label = s.labelPairs
+
+	return nil
+}
+
+// NewConstSummary returns a metric representing a Prometheus summary with fixed
+// values for the count, sum, and quantiles. As those parameters cannot be
+// changed, the returned value does not implement the Summary interface (but
+// only the Metric interface). Users of this package will not have much use for
+// it in regular operations. However, when implementing custom Collectors, it is
+// useful as a throw-away metric that is generated on the fly to send it to
+// Prometheus in the Collect method.
+//
+// quantiles maps ranks to quantile values. For example, a median latency of
+// 0.23s and a 99th percentile latency of 0.56s would be expressed as:
+//     map[float64]float64{0.5: 0.23, 0.99: 0.56}
+//
+// NewConstSummary returns an error if the length of labelValues is not
+// consistent with the variable labels in Desc or if Desc is invalid.
+func NewConstSummary(
+	desc *Desc,
+	count uint64,
+	sum float64,
+	quantiles map[float64]float64,
+	labelValues ...string,
+) (Metric, error) {
+	if desc.err != nil {
+		return nil, desc.err
+	}
+	if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil {
+		return nil, err
+	}
+	return &constSummary{
+		desc:       desc,
+		count:      count,
+		sum:        sum,
+		quantiles:  quantiles,
+		labelPairs: makeLabelPairs(desc, labelValues),
+	}, nil
+}
+
+// MustNewConstSummary is a version of NewConstSummary that panics where
+// NewConstMetric would have returned an error.
+func MustNewConstSummary(
+	desc *Desc,
+	count uint64,
+	sum float64,
+	quantiles map[float64]float64,
+	labelValues ...string,
+) Metric {
+	m, err := NewConstSummary(desc, count, sum, quantiles, labelValues...)
+	if err != nil {
+		panic(err)
+	}
+	return m
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/timer.go b/vendor/github.com/prometheus/client_golang/prometheus/timer.go
new file mode 100644
index 000000000..8d5f10523
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/timer.go
@@ -0,0 +1,54 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import "time"
+
+// Timer is a helper type to time functions. Use NewTimer to create new
+// instances.
+type Timer struct {
+	begin    time.Time
+	observer Observer
+}
+
+// NewTimer creates a new Timer. The provided Observer is used to observe a
+// duration in seconds. Timer is usually used to time a function call in the
+// following way:
+//    func TimeMe() {
+//        timer := NewTimer(myHistogram)
+//        defer timer.ObserveDuration()
+//        // Do actual work.
+//    }
+func NewTimer(o Observer) *Timer {
+	return &Timer{
+		begin:    time.Now(),
+		observer: o,
+	}
+}
+
+// ObserveDuration records the duration passed since the Timer was created with
+// NewTimer. It calls the Observe method of the Observer provided during
+// construction with the duration in seconds as an argument. The observed
+// duration is also returned. ObserveDuration is usually called with a defer
+// statement.
+//
+// Note that this method is only guaranteed to never observe negative durations
+// if used with Go1.9+.
+func (t *Timer) ObserveDuration() time.Duration {
+	d := time.Since(t.begin)
+	if t.observer != nil {
+		t.observer.Observe(d.Seconds())
+	}
+	return d
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/untyped.go b/vendor/github.com/prometheus/client_golang/prometheus/untyped.go
new file mode 100644
index 000000000..0f9ce63f4
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/untyped.go
@@ -0,0 +1,42 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+// UntypedOpts is an alias for Opts. See there for doc comments.
+type UntypedOpts Opts
+
+// UntypedFunc works like GaugeFunc but the collected metric is of type
+// "Untyped". UntypedFunc is useful to mirror an external metric of unknown
+// type.
+//
+// To create UntypedFunc instances, use NewUntypedFunc.
+type UntypedFunc interface {
+	Metric
+	Collector
+}
+
+// NewUntypedFunc creates a new UntypedFunc based on the provided
+// UntypedOpts. The value reported is determined by calling the given function
+// from within the Write method. Take into account that metric collection may
+// happen concurrently. If that results in concurrent calls to Write, like in
+// the case where an UntypedFunc is directly registered with Prometheus, the
+// provided function must be concurrency-safe.
+func NewUntypedFunc(opts UntypedOpts, function func() float64) UntypedFunc {
+	return newValueFunc(NewDesc(
+		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
+		opts.Help,
+		nil,
+		opts.ConstLabels,
+	), UntypedValue, function)
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/value.go b/vendor/github.com/prometheus/client_golang/prometheus/value.go
new file mode 100644
index 000000000..eb248f108
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/value.go
@@ -0,0 +1,162 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"fmt"
+	"sort"
+
+	"github.com/golang/protobuf/proto"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// ValueType is an enumeration of metric types that represent a simple value.
+type ValueType int
+
+// Possible values for the ValueType enum.
+const (
+	_ ValueType = iota
+	CounterValue
+	GaugeValue
+	UntypedValue
+)
+
+// valueFunc is a generic metric for simple values retrieved on collect time
+// from a function. It implements Metric and Collector. Its effective type is
+// determined by ValueType. This is a low-level building block used by the
+// library to back the implementations of CounterFunc, GaugeFunc, and
+// UntypedFunc.
+type valueFunc struct {
+	selfCollector
+
+	desc       *Desc
+	valType    ValueType
+	function   func() float64
+	labelPairs []*dto.LabelPair
+}
+
+// newValueFunc returns a newly allocated valueFunc with the given Desc and
+// ValueType. The value reported is determined by calling the given function
+// from within the Write method. Take into account that metric collection may
+// happen concurrently. If that results in concurrent calls to Write, like in
+// the case where a valueFunc is directly registered with Prometheus, the
+// provided function must be concurrency-safe.
+func newValueFunc(desc *Desc, valueType ValueType, function func() float64) *valueFunc {
+	result := &valueFunc{
+		desc:       desc,
+		valType:    valueType,
+		function:   function,
+		labelPairs: makeLabelPairs(desc, nil),
+	}
+	result.init(result)
+	return result
+}
+
+func (v *valueFunc) Desc() *Desc {
+	return v.desc
+}
+
+func (v *valueFunc) Write(out *dto.Metric) error {
+	return populateMetric(v.valType, v.function(), v.labelPairs, out)
+}
+
+// NewConstMetric returns a metric with one fixed value that cannot be
+// changed. Users of this package will not have much use for it in regular
+// operations. However, when implementing custom Collectors, it is useful as a
+// throw-away metric that is generated on the fly to send it to Prometheus in
+// the Collect method. NewConstMetric returns an error if the length of
+// labelValues is not consistent with the variable labels in Desc or if Desc is
+// invalid.
+func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) (Metric, error) {
+	if desc.err != nil {
+		return nil, desc.err
+	}
+	if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil {
+		return nil, err
+	}
+	return &constMetric{
+		desc:       desc,
+		valType:    valueType,
+		val:        value,
+		labelPairs: makeLabelPairs(desc, labelValues),
+	}, nil
+}
+
+// MustNewConstMetric is a version of NewConstMetric that panics where
+// NewConstMetric would have returned an error.
+func MustNewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues ...string) Metric {
+	m, err := NewConstMetric(desc, valueType, value, labelValues...)
+	if err != nil {
+		panic(err)
+	}
+	return m
+}
+
+type constMetric struct {
+	desc       *Desc
+	valType    ValueType
+	val        float64
+	labelPairs []*dto.LabelPair
+}
+
+func (m *constMetric) Desc() *Desc {
+	return m.desc
+}
+
+func (m *constMetric) Write(out *dto.Metric) error {
+	return populateMetric(m.valType, m.val, m.labelPairs, out)
+}
+
+func populateMetric(
+	t ValueType,
+	v float64,
+	labelPairs []*dto.LabelPair,
+	m *dto.Metric,
+) error {
+	m.Label = labelPairs
+	switch t {
+	case CounterValue:
+		m.Counter = &dto.Counter{Value: proto.Float64(v)}
+	case GaugeValue:
+		m.Gauge = &dto.Gauge{Value: proto.Float64(v)}
+	case UntypedValue:
+		m.Untyped = &dto.Untyped{Value: proto.Float64(v)}
+	default:
+		return fmt.Errorf("encountered unknown type %v", t)
+	}
+	return nil
+}
+
+func makeLabelPairs(desc *Desc, labelValues []string) []*dto.LabelPair {
+	totalLen := len(desc.variableLabels) + len(desc.constLabelPairs)
+	if totalLen == 0 {
+		// Super fast path.
+		return nil
+	}
+	if len(desc.variableLabels) == 0 {
+		// Moderately fast path.
+		return desc.constLabelPairs
+	}
+	labelPairs := make([]*dto.LabelPair, 0, totalLen)
+	for i, n := range desc.variableLabels {
+		labelPairs = append(labelPairs, &dto.LabelPair{
+			Name:  proto.String(n),
+			Value: proto.String(labelValues[i]),
+		})
+	}
+	labelPairs = append(labelPairs, desc.constLabelPairs...)
+	sort.Sort(labelPairSorter(labelPairs))
+	return labelPairs
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/vec.go b/vendor/github.com/prometheus/client_golang/prometheus/vec.go
new file mode 100644
index 000000000..14ed9e856
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/vec.go
@@ -0,0 +1,472 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/prometheus/common/model"
+)
+
+// metricVec is a Collector to bundle metrics of the same name that differ in
+// their label values. metricVec is not used directly (and therefore
+// unexported). It is used as a building block for implementations of vectors of
+// a given metric type, like GaugeVec, CounterVec, SummaryVec, and HistogramVec.
+// It also handles label currying. It uses basicMetricVec internally.
+type metricVec struct {
+	*metricMap
+
+	curry []curriedLabelValue
+
+	// hashAdd and hashAddByte can be replaced for testing collision handling.
+	hashAdd     func(h uint64, s string) uint64
+	hashAddByte func(h uint64, b byte) uint64
+}
+
+// newMetricVec returns an initialized metricVec.
+func newMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) *metricVec {
+	return &metricVec{
+		metricMap: &metricMap{
+			metrics:   map[uint64][]metricWithLabelValues{},
+			desc:      desc,
+			newMetric: newMetric,
+		},
+		hashAdd:     hashAdd,
+		hashAddByte: hashAddByte,
+	}
+}
+
+// DeleteLabelValues removes the metric where the variable labels are the same
+// as those passed in as labels (same order as the VariableLabels in Desc). It
+// returns true if a metric was deleted.
+//
+// It is not an error if the number of label values is not the same as the
+// number of VariableLabels in Desc. However, such inconsistent label count can
+// never match an actual metric, so the method will always return false in that
+// case.
+//
+// Note that for more than one label value, this method is prone to mistakes
+// caused by an incorrect order of arguments. Consider Delete(Labels) as an
+// alternative to avoid that type of mistake. For higher label numbers, the
+// latter has a much more readable (albeit more verbose) syntax, but it comes
+// with a performance overhead (for creating and processing the Labels map).
+// See also the CounterVec example.
+func (m *metricVec) DeleteLabelValues(lvs ...string) bool {
+	h, err := m.hashLabelValues(lvs)
+	if err != nil {
+		return false
+	}
+
+	return m.metricMap.deleteByHashWithLabelValues(h, lvs, m.curry)
+}
+
+// Delete deletes the metric where the variable labels are the same as those
+// passed in as labels. It returns true if a metric was deleted.
+//
+// It is not an error if the number and names of the Labels are inconsistent
+// with those of the VariableLabels in Desc. However, such inconsistent Labels
+// can never match an actual metric, so the method will always return false in
+// that case.
+//
+// This method is used for the same purpose as DeleteLabelValues(...string). See
+// there for pros and cons of the two methods.
+func (m *metricVec) Delete(labels Labels) bool {
+	h, err := m.hashLabels(labels)
+	if err != nil {
+		return false
+	}
+
+	return m.metricMap.deleteByHashWithLabels(h, labels, m.curry)
+}
+
+func (m *metricVec) curryWith(labels Labels) (*metricVec, error) {
+	var (
+		newCurry []curriedLabelValue
+		oldCurry = m.curry
+		iCurry   int
+	)
+	for i, label := range m.desc.variableLabels {
+		val, ok := labels[label]
+		if iCurry < len(oldCurry) && oldCurry[iCurry].index == i {
+			if ok {
+				return nil, fmt.Errorf("label name %q is already curried", label)
+			}
+			newCurry = append(newCurry, oldCurry[iCurry])
+			iCurry++
+		} else {
+			if !ok {
+				continue // Label stays uncurried.
+			}
+			newCurry = append(newCurry, curriedLabelValue{i, val})
+		}
+	}
+	if l := len(oldCurry) + len(labels) - len(newCurry); l > 0 {
+		return nil, fmt.Errorf("%d unknown label(s) found during currying", l)
+	}
+
+	return &metricVec{
+		metricMap:   m.metricMap,
+		curry:       newCurry,
+		hashAdd:     m.hashAdd,
+		hashAddByte: m.hashAddByte,
+	}, nil
+}
+
+func (m *metricVec) getMetricWithLabelValues(lvs ...string) (Metric, error) {
+	h, err := m.hashLabelValues(lvs)
+	if err != nil {
+		return nil, err
+	}
+
+	return m.metricMap.getOrCreateMetricWithLabelValues(h, lvs, m.curry), nil
+}
+
+func (m *metricVec) getMetricWith(labels Labels) (Metric, error) {
+	h, err := m.hashLabels(labels)
+	if err != nil {
+		return nil, err
+	}
+
+	return m.metricMap.getOrCreateMetricWithLabels(h, labels, m.curry), nil
+}
+
+func (m *metricVec) hashLabelValues(vals []string) (uint64, error) {
+	if err := validateLabelValues(vals, len(m.desc.variableLabels)-len(m.curry)); err != nil {
+		return 0, err
+	}
+
+	var (
+		h             = hashNew()
+		curry         = m.curry
+		iVals, iCurry int
+	)
+	for i := 0; i < len(m.desc.variableLabels); i++ {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			h = m.hashAdd(h, curry[iCurry].value)
+			iCurry++
+		} else {
+			h = m.hashAdd(h, vals[iVals])
+			iVals++
+		}
+		h = m.hashAddByte(h, model.SeparatorByte)
+	}
+	return h, nil
+}
+
+func (m *metricVec) hashLabels(labels Labels) (uint64, error) {
+	if err := validateValuesInLabels(labels, len(m.desc.variableLabels)-len(m.curry)); err != nil {
+		return 0, err
+	}
+
+	var (
+		h      = hashNew()
+		curry  = m.curry
+		iCurry int
+	)
+	for i, label := range m.desc.variableLabels {
+		val, ok := labels[label]
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			if ok {
+				return 0, fmt.Errorf("label name %q is already curried", label)
+			}
+			h = m.hashAdd(h, curry[iCurry].value)
+			iCurry++
+		} else {
+			if !ok {
+				return 0, fmt.Errorf("label name %q missing in label map", label)
+			}
+			h = m.hashAdd(h, val)
+		}
+		h = m.hashAddByte(h, model.SeparatorByte)
+	}
+	return h, nil
+}
+
+// metricWithLabelValues provides the metric and its label values for
+// disambiguation on hash collision.
+type metricWithLabelValues struct {
+	values []string
+	metric Metric
+}
+
+// curriedLabelValue sets the curried value for a label at the given index.
+type curriedLabelValue struct {
+	index int
+	value string
+}
+
+// metricMap is a helper for metricVec and shared between differently curried
+// metricVecs.
+type metricMap struct {
+	mtx       sync.RWMutex // Protects metrics.
+	metrics   map[uint64][]metricWithLabelValues
+	desc      *Desc
+	newMetric func(labelValues ...string) Metric
+}
+
+// Describe implements Collector. It will send exactly one Desc to the provided
+// channel.
+func (m *metricMap) Describe(ch chan<- *Desc) {
+	ch <- m.desc
+}
+
+// Collect implements Collector.
+func (m *metricMap) Collect(ch chan<- Metric) {
+	m.mtx.RLock()
+	defer m.mtx.RUnlock()
+
+	for _, metrics := range m.metrics {
+		for _, metric := range metrics {
+			ch <- metric.metric
+		}
+	}
+}
+
+// Reset deletes all metrics in this vector.
+func (m *metricMap) Reset() {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	for h := range m.metrics {
+		delete(m.metrics, h)
+	}
+}
+
+// deleteByHashWithLabelValues removes the metric from the hash bucket h. If
+// there are multiple matches in the bucket, use lvs to select a metric and
+// remove only that metric.
+func (m *metricMap) deleteByHashWithLabelValues(
+	h uint64, lvs []string, curry []curriedLabelValue,
+) bool {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	metrics, ok := m.metrics[h]
+	if !ok {
+		return false
+	}
+
+	i := findMetricWithLabelValues(metrics, lvs, curry)
+	if i >= len(metrics) {
+		return false
+	}
+
+	if len(metrics) > 1 {
+		m.metrics[h] = append(metrics[:i], metrics[i+1:]...)
+	} else {
+		delete(m.metrics, h)
+	}
+	return true
+}
+
+// deleteByHashWithLabels removes the metric from the hash bucket h. If there
+// are multiple matches in the bucket, use lvs to select a metric and remove
+// only that metric.
+func (m *metricMap) deleteByHashWithLabels(
+	h uint64, labels Labels, curry []curriedLabelValue,
+) bool {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	metrics, ok := m.metrics[h]
+	if !ok {
+		return false
+	}
+	i := findMetricWithLabels(m.desc, metrics, labels, curry)
+	if i >= len(metrics) {
+		return false
+	}
+
+	if len(metrics) > 1 {
+		m.metrics[h] = append(metrics[:i], metrics[i+1:]...)
+	} else {
+		delete(m.metrics, h)
+	}
+	return true
+}
+
+// getOrCreateMetricWithLabelValues retrieves the metric by hash and label value
+// or creates it and returns the new one.
+//
+// This function holds the mutex.
+func (m *metricMap) getOrCreateMetricWithLabelValues(
+	hash uint64, lvs []string, curry []curriedLabelValue,
+) Metric {
+	m.mtx.RLock()
+	metric, ok := m.getMetricWithHashAndLabelValues(hash, lvs, curry)
+	m.mtx.RUnlock()
+	if ok {
+		return metric
+	}
+
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	metric, ok = m.getMetricWithHashAndLabelValues(hash, lvs, curry)
+	if !ok {
+		inlinedLVs := inlineLabelValues(lvs, curry)
+		metric = m.newMetric(inlinedLVs...)
+		m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: inlinedLVs, metric: metric})
+	}
+	return metric
+}
+
+// getOrCreateMetricWithLabelValues retrieves the metric by hash and label value
+// or creates it and returns the new one.
+//
+// This function holds the mutex.
+func (m *metricMap) getOrCreateMetricWithLabels(
+	hash uint64, labels Labels, curry []curriedLabelValue,
+) Metric {
+	m.mtx.RLock()
+	metric, ok := m.getMetricWithHashAndLabels(hash, labels, curry)
+	m.mtx.RUnlock()
+	if ok {
+		return metric
+	}
+
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	metric, ok = m.getMetricWithHashAndLabels(hash, labels, curry)
+	if !ok {
+		lvs := extractLabelValues(m.desc, labels, curry)
+		metric = m.newMetric(lvs...)
+		m.metrics[hash] = append(m.metrics[hash], metricWithLabelValues{values: lvs, metric: metric})
+	}
+	return metric
+}
+
+// getMetricWithHashAndLabelValues gets a metric while handling possible
+// collisions in the hash space. Must be called while holding the read mutex.
+func (m *metricMap) getMetricWithHashAndLabelValues(
+	h uint64, lvs []string, curry []curriedLabelValue,
+) (Metric, bool) {
+	metrics, ok := m.metrics[h]
+	if ok {
+		if i := findMetricWithLabelValues(metrics, lvs, curry); i < len(metrics) {
+			return metrics[i].metric, true
+		}
+	}
+	return nil, false
+}
+
+// getMetricWithHashAndLabels gets a metric while handling possible collisions in
+// the hash space. Must be called while holding read mutex.
+func (m *metricMap) getMetricWithHashAndLabels(
+	h uint64, labels Labels, curry []curriedLabelValue,
+) (Metric, bool) {
+	metrics, ok := m.metrics[h]
+	if ok {
+		if i := findMetricWithLabels(m.desc, metrics, labels, curry); i < len(metrics) {
+			return metrics[i].metric, true
+		}
+	}
+	return nil, false
+}
+
+// findMetricWithLabelValues returns the index of the matching metric or
+// len(metrics) if not found.
+func findMetricWithLabelValues(
+	metrics []metricWithLabelValues, lvs []string, curry []curriedLabelValue,
+) int {
+	for i, metric := range metrics {
+		if matchLabelValues(metric.values, lvs, curry) {
+			return i
+		}
+	}
+	return len(metrics)
+}
+
+// findMetricWithLabels returns the index of the matching metric or len(metrics)
+// if not found.
+func findMetricWithLabels(
+	desc *Desc, metrics []metricWithLabelValues, labels Labels, curry []curriedLabelValue,
+) int {
+	for i, metric := range metrics {
+		if matchLabels(desc, metric.values, labels, curry) {
+			return i
+		}
+	}
+	return len(metrics)
+}
+
+func matchLabelValues(values []string, lvs []string, curry []curriedLabelValue) bool {
+	if len(values) != len(lvs)+len(curry) {
+		return false
+	}
+	var iLVs, iCurry int
+	for i, v := range values {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			if v != curry[iCurry].value {
+				return false
+			}
+			iCurry++
+			continue
+		}
+		if v != lvs[iLVs] {
+			return false
+		}
+		iLVs++
+	}
+	return true
+}
+
+func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabelValue) bool {
+	if len(values) != len(labels)+len(curry) {
+		return false
+	}
+	iCurry := 0
+	for i, k := range desc.variableLabels {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			if values[i] != curry[iCurry].value {
+				return false
+			}
+			iCurry++
+			continue
+		}
+		if values[i] != labels[k] {
+			return false
+		}
+	}
+	return true
+}
+
+func extractLabelValues(desc *Desc, labels Labels, curry []curriedLabelValue) []string {
+	labelValues := make([]string, len(labels)+len(curry))
+	iCurry := 0
+	for i, k := range desc.variableLabels {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			labelValues[i] = curry[iCurry].value
+			iCurry++
+			continue
+		}
+		labelValues[i] = labels[k]
+	}
+	return labelValues
+}
+
+func inlineLabelValues(lvs []string, curry []curriedLabelValue) []string {
+	labelValues := make([]string, len(lvs)+len(curry))
+	var iCurry, iLVs int
+	for i := range labelValues {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			labelValues[i] = curry[iCurry].value
+			iCurry++
+			continue
+		}
+		labelValues[i] = lvs[iLVs]
+		iLVs++
+	}
+	return labelValues
+}
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/wrap.go b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go
new file mode 100644
index 000000000..e303eef6d
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/wrap.go
@@ -0,0 +1,200 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+import (
+	"fmt"
+	"sort"
+
+	"github.com/golang/protobuf/proto"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// WrapRegistererWith returns a Registerer wrapping the provided
+// Registerer. Collectors registered with the returned Registerer will be
+// registered with the wrapped Registerer in a modified way. The modified
+// Collector adds the provided Labels to all Metrics it collects (as
+// ConstLabels). The Metrics collected by the unmodified Collector must not
+// duplicate any of those labels.
+//
+// WrapRegistererWith provides a way to add fixed labels to a subset of
+// Collectors. It should not be used to add fixed labels to all metrics exposed.
+//
+// Conflicts between Collectors registered through the original Registerer with
+// Collectors registered through the wrapping Registerer will still be
+// detected. Any AlreadyRegisteredError returned by the Register method of
+// either Registerer will contain the ExistingCollector in the form it was
+// provided to the respective registry.
+//
+// The Collector example demonstrates a use of WrapRegistererWith.
+func WrapRegistererWith(labels Labels, reg Registerer) Registerer {
+	return &wrappingRegisterer{
+		wrappedRegisterer: reg,
+		labels:            labels,
+	}
+}
+
+// WrapRegistererWithPrefix returns a Registerer wrapping the provided
+// Registerer. Collectors registered with the returned Registerer will be
+// registered with the wrapped Registerer in a modified way. The modified
+// Collector adds the provided prefix to the name of all Metrics it collects.
+//
+// WrapRegistererWithPrefix is useful to have one place to prefix all metrics of
+// a sub-system. To make this work, register metrics of the sub-system with the
+// wrapping Registerer returned by WrapRegistererWithPrefix. It is rarely useful
+// to use the same prefix for all metrics exposed. In particular, do not prefix
+// metric names that are standardized across applications, as that would break
+// horizontal monitoring, for example the metrics provided by the Go collector
+// (see NewGoCollector) and the process collector (see NewProcessCollector). (In
+// fact, those metrics are already prefixed with “go_” or “process_”,
+// respectively.)
+//
+// Conflicts between Collectors registered through the original Registerer with
+// Collectors registered through the wrapping Registerer will still be
+// detected. Any AlreadyRegisteredError returned by the Register method of
+// either Registerer will contain the ExistingCollector in the form it was
+// provided to the respective registry.
+func WrapRegistererWithPrefix(prefix string, reg Registerer) Registerer {
+	return &wrappingRegisterer{
+		wrappedRegisterer: reg,
+		prefix:            prefix,
+	}
+}
+
+type wrappingRegisterer struct {
+	wrappedRegisterer Registerer
+	prefix            string
+	labels            Labels
+}
+
+func (r *wrappingRegisterer) Register(c Collector) error {
+	return r.wrappedRegisterer.Register(&wrappingCollector{
+		wrappedCollector: c,
+		prefix:           r.prefix,
+		labels:           r.labels,
+	})
+}
+
+func (r *wrappingRegisterer) MustRegister(cs ...Collector) {
+	for _, c := range cs {
+		if err := r.Register(c); err != nil {
+			panic(err)
+		}
+	}
+}
+
+func (r *wrappingRegisterer) Unregister(c Collector) bool {
+	return r.wrappedRegisterer.Unregister(&wrappingCollector{
+		wrappedCollector: c,
+		prefix:           r.prefix,
+		labels:           r.labels,
+	})
+}
+
+type wrappingCollector struct {
+	wrappedCollector Collector
+	prefix           string
+	labels           Labels
+}
+
+func (c *wrappingCollector) Collect(ch chan<- Metric) {
+	wrappedCh := make(chan Metric)
+	go func() {
+		c.wrappedCollector.Collect(wrappedCh)
+		close(wrappedCh)
+	}()
+	for m := range wrappedCh {
+		ch <- &wrappingMetric{
+			wrappedMetric: m,
+			prefix:        c.prefix,
+			labels:        c.labels,
+		}
+	}
+}
+
+func (c *wrappingCollector) Describe(ch chan<- *Desc) {
+	wrappedCh := make(chan *Desc)
+	go func() {
+		c.wrappedCollector.Describe(wrappedCh)
+		close(wrappedCh)
+	}()
+	for desc := range wrappedCh {
+		ch <- wrapDesc(desc, c.prefix, c.labels)
+	}
+}
+
+func (c *wrappingCollector) unwrapRecursively() Collector {
+	switch wc := c.wrappedCollector.(type) {
+	case *wrappingCollector:
+		return wc.unwrapRecursively()
+	default:
+		return wc
+	}
+}
+
+type wrappingMetric struct {
+	wrappedMetric Metric
+	prefix        string
+	labels        Labels
+}
+
+func (m *wrappingMetric) Desc() *Desc {
+	return wrapDesc(m.wrappedMetric.Desc(), m.prefix, m.labels)
+}
+
+func (m *wrappingMetric) Write(out *dto.Metric) error {
+	if err := m.wrappedMetric.Write(out); err != nil {
+		return err
+	}
+	if len(m.labels) == 0 {
+		// No wrapping labels.
+		return nil
+	}
+	for ln, lv := range m.labels {
+		out.Label = append(out.Label, &dto.LabelPair{
+			Name:  proto.String(ln),
+			Value: proto.String(lv),
+		})
+	}
+	sort.Sort(labelPairSorter(out.Label))
+	return nil
+}
+
+func wrapDesc(desc *Desc, prefix string, labels Labels) *Desc {
+	constLabels := Labels{}
+	for _, lp := range desc.constLabelPairs {
+		constLabels[*lp.Name] = *lp.Value
+	}
+	for ln, lv := range labels {
+		if _, alreadyUsed := constLabels[ln]; alreadyUsed {
+			return &Desc{
+				fqName:          desc.fqName,
+				help:            desc.help,
+				variableLabels:  desc.variableLabels,
+				constLabelPairs: desc.constLabelPairs,
+				err:             fmt.Errorf("attempted wrapping with already existing label name %q", ln),
+			}
+		}
+		constLabels[ln] = lv
+	}
+	// NewDesc will do remaining validations.
+	newDesc := NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels)
+	// Propagate errors if there was any. This will override any errer
+	// created by NewDesc above, i.e. earlier errors get precedence.
+	if desc.err != nil {
+		newDesc.err = desc.err
+	}
+	return newDesc
+}
diff --git a/vendor/github.com/prometheus/client_model/LICENSE b/vendor/github.com/prometheus/client_model/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/prometheus/client_model/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/prometheus/client_model/NOTICE b/vendor/github.com/prometheus/client_model/NOTICE
new file mode 100644
index 000000000..20110e410
--- /dev/null
+++ b/vendor/github.com/prometheus/client_model/NOTICE
@@ -0,0 +1,5 @@
+Data model artifacts for Prometheus.
+Copyright 2012-2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
diff --git a/vendor/github.com/prometheus/client_model/go/metrics.pb.go b/vendor/github.com/prometheus/client_model/go/metrics.pb.go
new file mode 100644
index 000000000..9805432c2
--- /dev/null
+++ b/vendor/github.com/prometheus/client_model/go/metrics.pb.go
@@ -0,0 +1,629 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: metrics.proto
+
+package io_prometheus_client // import "github.com/prometheus/client_model/go"
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type MetricType int32
+
+const (
+	MetricType_COUNTER   MetricType = 0
+	MetricType_GAUGE     MetricType = 1
+	MetricType_SUMMARY   MetricType = 2
+	MetricType_UNTYPED   MetricType = 3
+	MetricType_HISTOGRAM MetricType = 4
+)
+
+var MetricType_name = map[int32]string{
+	0: "COUNTER",
+	1: "GAUGE",
+	2: "SUMMARY",
+	3: "UNTYPED",
+	4: "HISTOGRAM",
+}
+var MetricType_value = map[string]int32{
+	"COUNTER":   0,
+	"GAUGE":     1,
+	"SUMMARY":   2,
+	"UNTYPED":   3,
+	"HISTOGRAM": 4,
+}
+
+func (x MetricType) Enum() *MetricType {
+	p := new(MetricType)
+	*p = x
+	return p
+}
+func (x MetricType) String() string {
+	return proto.EnumName(MetricType_name, int32(x))
+}
+func (x *MetricType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MetricType_value, data, "MetricType")
+	if err != nil {
+		return err
+	}
+	*x = MetricType(value)
+	return nil
+}
+func (MetricType) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{0}
+}
+
+type LabelPair struct {
+	Name                 *string  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Value                *string  `protobuf:"bytes,2,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *LabelPair) Reset()         { *m = LabelPair{} }
+func (m *LabelPair) String() string { return proto.CompactTextString(m) }
+func (*LabelPair) ProtoMessage()    {}
+func (*LabelPair) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{0}
+}
+func (m *LabelPair) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LabelPair.Unmarshal(m, b)
+}
+func (m *LabelPair) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LabelPair.Marshal(b, m, deterministic)
+}
+func (dst *LabelPair) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LabelPair.Merge(dst, src)
+}
+func (m *LabelPair) XXX_Size() int {
+	return xxx_messageInfo_LabelPair.Size(m)
+}
+func (m *LabelPair) XXX_DiscardUnknown() {
+	xxx_messageInfo_LabelPair.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LabelPair proto.InternalMessageInfo
+
+func (m *LabelPair) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *LabelPair) GetValue() string {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return ""
+}
+
+type Gauge struct {
+	Value                *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Gauge) Reset()         { *m = Gauge{} }
+func (m *Gauge) String() string { return proto.CompactTextString(m) }
+func (*Gauge) ProtoMessage()    {}
+func (*Gauge) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{1}
+}
+func (m *Gauge) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Gauge.Unmarshal(m, b)
+}
+func (m *Gauge) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Gauge.Marshal(b, m, deterministic)
+}
+func (dst *Gauge) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Gauge.Merge(dst, src)
+}
+func (m *Gauge) XXX_Size() int {
+	return xxx_messageInfo_Gauge.Size(m)
+}
+func (m *Gauge) XXX_DiscardUnknown() {
+	xxx_messageInfo_Gauge.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Gauge proto.InternalMessageInfo
+
+func (m *Gauge) GetValue() float64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type Counter struct {
+	Value                *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Counter) Reset()         { *m = Counter{} }
+func (m *Counter) String() string { return proto.CompactTextString(m) }
+func (*Counter) ProtoMessage()    {}
+func (*Counter) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{2}
+}
+func (m *Counter) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Counter.Unmarshal(m, b)
+}
+func (m *Counter) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Counter.Marshal(b, m, deterministic)
+}
+func (dst *Counter) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Counter.Merge(dst, src)
+}
+func (m *Counter) XXX_Size() int {
+	return xxx_messageInfo_Counter.Size(m)
+}
+func (m *Counter) XXX_DiscardUnknown() {
+	xxx_messageInfo_Counter.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Counter proto.InternalMessageInfo
+
+func (m *Counter) GetValue() float64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type Quantile struct {
+	Quantile             *float64 `protobuf:"fixed64,1,opt,name=quantile" json:"quantile,omitempty"`
+	Value                *float64 `protobuf:"fixed64,2,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Quantile) Reset()         { *m = Quantile{} }
+func (m *Quantile) String() string { return proto.CompactTextString(m) }
+func (*Quantile) ProtoMessage()    {}
+func (*Quantile) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{3}
+}
+func (m *Quantile) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Quantile.Unmarshal(m, b)
+}
+func (m *Quantile) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Quantile.Marshal(b, m, deterministic)
+}
+func (dst *Quantile) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Quantile.Merge(dst, src)
+}
+func (m *Quantile) XXX_Size() int {
+	return xxx_messageInfo_Quantile.Size(m)
+}
+func (m *Quantile) XXX_DiscardUnknown() {
+	xxx_messageInfo_Quantile.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Quantile proto.InternalMessageInfo
+
+func (m *Quantile) GetQuantile() float64 {
+	if m != nil && m.Quantile != nil {
+		return *m.Quantile
+	}
+	return 0
+}
+
+func (m *Quantile) GetValue() float64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type Summary struct {
+	SampleCount          *uint64     `protobuf:"varint,1,opt,name=sample_count,json=sampleCount" json:"sample_count,omitempty"`
+	SampleSum            *float64    `protobuf:"fixed64,2,opt,name=sample_sum,json=sampleSum" json:"sample_sum,omitempty"`
+	Quantile             []*Quantile `protobuf:"bytes,3,rep,name=quantile" json:"quantile,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *Summary) Reset()         { *m = Summary{} }
+func (m *Summary) String() string { return proto.CompactTextString(m) }
+func (*Summary) ProtoMessage()    {}
+func (*Summary) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{4}
+}
+func (m *Summary) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Summary.Unmarshal(m, b)
+}
+func (m *Summary) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Summary.Marshal(b, m, deterministic)
+}
+func (dst *Summary) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Summary.Merge(dst, src)
+}
+func (m *Summary) XXX_Size() int {
+	return xxx_messageInfo_Summary.Size(m)
+}
+func (m *Summary) XXX_DiscardUnknown() {
+	xxx_messageInfo_Summary.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Summary proto.InternalMessageInfo
+
+func (m *Summary) GetSampleCount() uint64 {
+	if m != nil && m.SampleCount != nil {
+		return *m.SampleCount
+	}
+	return 0
+}
+
+func (m *Summary) GetSampleSum() float64 {
+	if m != nil && m.SampleSum != nil {
+		return *m.SampleSum
+	}
+	return 0
+}
+
+func (m *Summary) GetQuantile() []*Quantile {
+	if m != nil {
+		return m.Quantile
+	}
+	return nil
+}
+
+type Untyped struct {
+	Value                *float64 `protobuf:"fixed64,1,opt,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Untyped) Reset()         { *m = Untyped{} }
+func (m *Untyped) String() string { return proto.CompactTextString(m) }
+func (*Untyped) ProtoMessage()    {}
+func (*Untyped) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{5}
+}
+func (m *Untyped) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Untyped.Unmarshal(m, b)
+}
+func (m *Untyped) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Untyped.Marshal(b, m, deterministic)
+}
+func (dst *Untyped) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Untyped.Merge(dst, src)
+}
+func (m *Untyped) XXX_Size() int {
+	return xxx_messageInfo_Untyped.Size(m)
+}
+func (m *Untyped) XXX_DiscardUnknown() {
+	xxx_messageInfo_Untyped.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Untyped proto.InternalMessageInfo
+
+func (m *Untyped) GetValue() float64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type Histogram struct {
+	SampleCount          *uint64   `protobuf:"varint,1,opt,name=sample_count,json=sampleCount" json:"sample_count,omitempty"`
+	SampleSum            *float64  `protobuf:"fixed64,2,opt,name=sample_sum,json=sampleSum" json:"sample_sum,omitempty"`
+	Bucket               []*Bucket `protobuf:"bytes,3,rep,name=bucket" json:"bucket,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
+	XXX_unrecognized     []byte    `json:"-"`
+	XXX_sizecache        int32     `json:"-"`
+}
+
+func (m *Histogram) Reset()         { *m = Histogram{} }
+func (m *Histogram) String() string { return proto.CompactTextString(m) }
+func (*Histogram) ProtoMessage()    {}
+func (*Histogram) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{6}
+}
+func (m *Histogram) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Histogram.Unmarshal(m, b)
+}
+func (m *Histogram) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Histogram.Marshal(b, m, deterministic)
+}
+func (dst *Histogram) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Histogram.Merge(dst, src)
+}
+func (m *Histogram) XXX_Size() int {
+	return xxx_messageInfo_Histogram.Size(m)
+}
+func (m *Histogram) XXX_DiscardUnknown() {
+	xxx_messageInfo_Histogram.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Histogram proto.InternalMessageInfo
+
+func (m *Histogram) GetSampleCount() uint64 {
+	if m != nil && m.SampleCount != nil {
+		return *m.SampleCount
+	}
+	return 0
+}
+
+func (m *Histogram) GetSampleSum() float64 {
+	if m != nil && m.SampleSum != nil {
+		return *m.SampleSum
+	}
+	return 0
+}
+
+func (m *Histogram) GetBucket() []*Bucket {
+	if m != nil {
+		return m.Bucket
+	}
+	return nil
+}
+
+type Bucket struct {
+	CumulativeCount      *uint64  `protobuf:"varint,1,opt,name=cumulative_count,json=cumulativeCount" json:"cumulative_count,omitempty"`
+	UpperBound           *float64 `protobuf:"fixed64,2,opt,name=upper_bound,json=upperBound" json:"upper_bound,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Bucket) Reset()         { *m = Bucket{} }
+func (m *Bucket) String() string { return proto.CompactTextString(m) }
+func (*Bucket) ProtoMessage()    {}
+func (*Bucket) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{7}
+}
+func (m *Bucket) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Bucket.Unmarshal(m, b)
+}
+func (m *Bucket) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Bucket.Marshal(b, m, deterministic)
+}
+func (dst *Bucket) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Bucket.Merge(dst, src)
+}
+func (m *Bucket) XXX_Size() int {
+	return xxx_messageInfo_Bucket.Size(m)
+}
+func (m *Bucket) XXX_DiscardUnknown() {
+	xxx_messageInfo_Bucket.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Bucket proto.InternalMessageInfo
+
+func (m *Bucket) GetCumulativeCount() uint64 {
+	if m != nil && m.CumulativeCount != nil {
+		return *m.CumulativeCount
+	}
+	return 0
+}
+
+func (m *Bucket) GetUpperBound() float64 {
+	if m != nil && m.UpperBound != nil {
+		return *m.UpperBound
+	}
+	return 0
+}
+
+type Metric struct {
+	Label                []*LabelPair `protobuf:"bytes,1,rep,name=label" json:"label,omitempty"`
+	Gauge                *Gauge       `protobuf:"bytes,2,opt,name=gauge" json:"gauge,omitempty"`
+	Counter              *Counter     `protobuf:"bytes,3,opt,name=counter" json:"counter,omitempty"`
+	Summary              *Summary     `protobuf:"bytes,4,opt,name=summary" json:"summary,omitempty"`
+	Untyped              *Untyped     `protobuf:"bytes,5,opt,name=untyped" json:"untyped,omitempty"`
+	Histogram            *Histogram   `protobuf:"bytes,7,opt,name=histogram" json:"histogram,omitempty"`
+	TimestampMs          *int64       `protobuf:"varint,6,opt,name=timestamp_ms,json=timestampMs" json:"timestamp_ms,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}     `json:"-"`
+	XXX_unrecognized     []byte       `json:"-"`
+	XXX_sizecache        int32        `json:"-"`
+}
+
+func (m *Metric) Reset()         { *m = Metric{} }
+func (m *Metric) String() string { return proto.CompactTextString(m) }
+func (*Metric) ProtoMessage()    {}
+func (*Metric) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{8}
+}
+func (m *Metric) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Metric.Unmarshal(m, b)
+}
+func (m *Metric) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Metric.Marshal(b, m, deterministic)
+}
+func (dst *Metric) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Metric.Merge(dst, src)
+}
+func (m *Metric) XXX_Size() int {
+	return xxx_messageInfo_Metric.Size(m)
+}
+func (m *Metric) XXX_DiscardUnknown() {
+	xxx_messageInfo_Metric.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Metric proto.InternalMessageInfo
+
+func (m *Metric) GetLabel() []*LabelPair {
+	if m != nil {
+		return m.Label
+	}
+	return nil
+}
+
+func (m *Metric) GetGauge() *Gauge {
+	if m != nil {
+		return m.Gauge
+	}
+	return nil
+}
+
+func (m *Metric) GetCounter() *Counter {
+	if m != nil {
+		return m.Counter
+	}
+	return nil
+}
+
+func (m *Metric) GetSummary() *Summary {
+	if m != nil {
+		return m.Summary
+	}
+	return nil
+}
+
+func (m *Metric) GetUntyped() *Untyped {
+	if m != nil {
+		return m.Untyped
+	}
+	return nil
+}
+
+func (m *Metric) GetHistogram() *Histogram {
+	if m != nil {
+		return m.Histogram
+	}
+	return nil
+}
+
+func (m *Metric) GetTimestampMs() int64 {
+	if m != nil && m.TimestampMs != nil {
+		return *m.TimestampMs
+	}
+	return 0
+}
+
+type MetricFamily struct {
+	Name                 *string     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Help                 *string     `protobuf:"bytes,2,opt,name=help" json:"help,omitempty"`
+	Type                 *MetricType `protobuf:"varint,3,opt,name=type,enum=io.prometheus.client.MetricType" json:"type,omitempty"`
+	Metric               []*Metric   `protobuf:"bytes,4,rep,name=metric" json:"metric,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *MetricFamily) Reset()         { *m = MetricFamily{} }
+func (m *MetricFamily) String() string { return proto.CompactTextString(m) }
+func (*MetricFamily) ProtoMessage()    {}
+func (*MetricFamily) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_c97c9a2b9560cb8f, []int{9}
+}
+func (m *MetricFamily) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MetricFamily.Unmarshal(m, b)
+}
+func (m *MetricFamily) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MetricFamily.Marshal(b, m, deterministic)
+}
+func (dst *MetricFamily) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MetricFamily.Merge(dst, src)
+}
+func (m *MetricFamily) XXX_Size() int {
+	return xxx_messageInfo_MetricFamily.Size(m)
+}
+func (m *MetricFamily) XXX_DiscardUnknown() {
+	xxx_messageInfo_MetricFamily.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MetricFamily proto.InternalMessageInfo
+
+func (m *MetricFamily) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *MetricFamily) GetHelp() string {
+	if m != nil && m.Help != nil {
+		return *m.Help
+	}
+	return ""
+}
+
+func (m *MetricFamily) GetType() MetricType {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return MetricType_COUNTER
+}
+
+func (m *MetricFamily) GetMetric() []*Metric {
+	if m != nil {
+		return m.Metric
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*LabelPair)(nil), "io.prometheus.client.LabelPair")
+	proto.RegisterType((*Gauge)(nil), "io.prometheus.client.Gauge")
+	proto.RegisterType((*Counter)(nil), "io.prometheus.client.Counter")
+	proto.RegisterType((*Quantile)(nil), "io.prometheus.client.Quantile")
+	proto.RegisterType((*Summary)(nil), "io.prometheus.client.Summary")
+	proto.RegisterType((*Untyped)(nil), "io.prometheus.client.Untyped")
+	proto.RegisterType((*Histogram)(nil), "io.prometheus.client.Histogram")
+	proto.RegisterType((*Bucket)(nil), "io.prometheus.client.Bucket")
+	proto.RegisterType((*Metric)(nil), "io.prometheus.client.Metric")
+	proto.RegisterType((*MetricFamily)(nil), "io.prometheus.client.MetricFamily")
+	proto.RegisterEnum("io.prometheus.client.MetricType", MetricType_name, MetricType_value)
+}
+
+func init() { proto.RegisterFile("metrics.proto", fileDescriptor_metrics_c97c9a2b9560cb8f) }
+
+var fileDescriptor_metrics_c97c9a2b9560cb8f = []byte{
+	// 591 bytes of a gzipped FileDescriptorProto
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+	0xf2, 0x43, 0xa7, 0x19, 0x5f, 0x16, 0xf4, 0xe6, 0x81, 0x0f, 0xfd, 0x69, 0x81, 0x7b, 0x9e, 0x54,
+	0x3c, 0x9f, 0x97, 0x84, 0xfd, 0x03, 0xb3, 0x07, 0xd0, 0x9d, 0x89, 0xf8, 0x3b, 0xe5, 0xc6, 0xea,
+	0xf3, 0x76, 0xab, 0x27, 0x8a, 0x83, 0x0d, 0x77, 0x30, 0x81, 0xae, 0x46, 0xd0, 0x2b, 0xf0, 0x63,
+	0xc1, 0x44, 0x4a, 0x78, 0x72, 0x7b, 0xdf, 0xc5, 0x93, 0x06, 0xd7, 0x4e, 0x76, 0xc0, 0x13, 0x45,
+	0x41, 0xcb, 0x68, 0x96, 0x8b, 0xec, 0xc6, 0x58, 0x01, 0x05, 0x9d, 0x48, 0x64, 0xf0, 0x67, 0x0d,
+	0xba, 0xa1, 0xca, 0x18, 0x3a, 0x04, 0x27, 0x95, 0x31, 0x0a, 0x2c, 0xe5, 0x6a, 0xa7, 0xdd, 0xd5,
+	0x2a, 0x69, 0x58, 0xb3, 0xd1, 0x1b, 0x70, 0xe6, 0x32, 0x46, 0x6a, 0xb8, 0xb7, 0xff, 0xac, 0x5d,
+	0xa6, 0x92, 0x86, 0x35, 0x13, 0xbd, 0x85, 0x5e, 0xac, 0xa3, 0x15, 0x74, 0x94, 0x68, 0xbb, 0x5d,
+	0x64, 0xf2, 0x87, 0x6b, 0xb6, 0x14, 0x56, 0x3a, 0x33, 0x81, 0xfd, 0x98, 0xd0, 0x04, 0x0b, 0xd7,
+	0x6c, 0x29, 0x14, 0xfa, 0x8e, 0x03, 0xe7, 0x31, 0xa1, 0x09, 0x02, 0xae, 0xd9, 0xe8, 0x03, 0xb8,
+	0x8b, 0xfa, 0xea, 0x83, 0x9e, 0x92, 0x3e, 0x70, 0x30, 0xab, 0x84, 0xe0, 0x46, 0x21, 0xc3, 0xc2,
+	0x13, 0x46, 0x2b, 0x4e, 0x58, 0x11, 0xb1, 0x2a, 0xe8, 0xf6, 0xad, 0xdd, 0x0e, 0xf6, 0x56, 0x58,
+	0x58, 0x0d, 0x7e, 0x5b, 0xb0, 0xa1, 0x6f, 0xe0, 0x13, 0x61, 0x49, 0xba, 0x6c, 0xfd, 0x83, 0x11,
+	0xd8, 0x0b, 0x9a, 0x16, 0xe6, 0x07, 0x56, 0x35, 0x3a, 0x00, 0x5b, 0x7a, 0x54, 0x47, 0xf8, 0xff,
+	0x7e, 0xbf, 0xdd, 0x95, 0x9e, 0x3c, 0x59, 0x16, 0x14, 0x2b, 0xb6, 0x0c, 0x9f, 0x7e, 0x53, 0x02,
+	0xfb, 0xb1, 0xf0, 0x69, 0x1d, 0x36, 0xdc, 0xd7, 0x21, 0x40, 0x33, 0x09, 0x79, 0xd0, 0x3b, 0xbd,
+	0x9c, 0x5e, 0x4c, 0xce, 0xb0, 0xff, 0x1f, 0x72, 0xc1, 0x19, 0x1d, 0x4f, 0x47, 0x67, 0xbe, 0x25,
+	0xf1, 0xf1, 0x34, 0x0c, 0x8f, 0xf1, 0xb5, 0xbf, 0x26, 0x17, 0xd3, 0x8b, 0xc9, 0xf5, 0xd5, 0xd9,
+	0x47, 0xbf, 0x83, 0x36, 0xc1, 0x3d, 0xff, 0x3c, 0x9e, 0x5c, 0x8e, 0xf0, 0x71, 0xe8, 0xdb, 0x27,
+	0x18, 0x5a, 0x5f, 0xb2, 0x6f, 0x47, 0xf3, 0x84, 0x2f, 0xc4, 0x6c, 0x18, 0xe7, 0x6c, 0xaf, 0xe9,
+	0xee, 0xe9, 0x6e, 0xc4, 0xf2, 0x1b, 0x9a, 0xee, 0xcd, 0xf3, 0x77, 0x49, 0x1e, 0x35, 0xdd, 0x48,
+	0x77, 0xff, 0x06, 0x00, 0x00, 0xff, 0xff, 0x45, 0x21, 0x7f, 0x64, 0x2b, 0x05, 0x00, 0x00,
+}
diff --git a/vendor/github.com/prometheus/common/LICENSE b/vendor/github.com/prometheus/common/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/prometheus/common/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/prometheus/common/NOTICE b/vendor/github.com/prometheus/common/NOTICE
new file mode 100644
index 000000000..636a2c1a5
--- /dev/null
+++ b/vendor/github.com/prometheus/common/NOTICE
@@ -0,0 +1,5 @@
+Common libraries shared by Prometheus Go components.
+Copyright 2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
diff --git a/vendor/github.com/prometheus/common/expfmt/decode.go b/vendor/github.com/prometheus/common/expfmt/decode.go
new file mode 100644
index 000000000..c092723e8
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/decode.go
@@ -0,0 +1,429 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package expfmt
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"mime"
+	"net/http"
+
+	dto "github.com/prometheus/client_model/go"
+
+	"github.com/matttproud/golang_protobuf_extensions/pbutil"
+	"github.com/prometheus/common/model"
+)
+
+// Decoder types decode an input stream into metric families.
+type Decoder interface {
+	Decode(*dto.MetricFamily) error
+}
+
+// DecodeOptions contains options used by the Decoder and in sample extraction.
+type DecodeOptions struct {
+	// Timestamp is added to each value from the stream that has no explicit timestamp set.
+	Timestamp model.Time
+}
+
+// ResponseFormat extracts the correct format from a HTTP response header.
+// If no matching format can be found FormatUnknown is returned.
+func ResponseFormat(h http.Header) Format {
+	ct := h.Get(hdrContentType)
+
+	mediatype, params, err := mime.ParseMediaType(ct)
+	if err != nil {
+		return FmtUnknown
+	}
+
+	const textType = "text/plain"
+
+	switch mediatype {
+	case ProtoType:
+		if p, ok := params["proto"]; ok && p != ProtoProtocol {
+			return FmtUnknown
+		}
+		if e, ok := params["encoding"]; ok && e != "delimited" {
+			return FmtUnknown
+		}
+		return FmtProtoDelim
+
+	case textType:
+		if v, ok := params["version"]; ok && v != TextVersion {
+			return FmtUnknown
+		}
+		return FmtText
+	}
+
+	return FmtUnknown
+}
+
+// NewDecoder returns a new decoder based on the given input format.
+// If the input format does not imply otherwise, a text format decoder is returned.
+func NewDecoder(r io.Reader, format Format) Decoder {
+	switch format {
+	case FmtProtoDelim:
+		return &protoDecoder{r: r}
+	}
+	return &textDecoder{r: r}
+}
+
+// protoDecoder implements the Decoder interface for protocol buffers.
+type protoDecoder struct {
+	r io.Reader
+}
+
+// Decode implements the Decoder interface.
+func (d *protoDecoder) Decode(v *dto.MetricFamily) error {
+	_, err := pbutil.ReadDelimited(d.r, v)
+	if err != nil {
+		return err
+	}
+	if !model.IsValidMetricName(model.LabelValue(v.GetName())) {
+		return fmt.Errorf("invalid metric name %q", v.GetName())
+	}
+	for _, m := range v.GetMetric() {
+		if m == nil {
+			continue
+		}
+		for _, l := range m.GetLabel() {
+			if l == nil {
+				continue
+			}
+			if !model.LabelValue(l.GetValue()).IsValid() {
+				return fmt.Errorf("invalid label value %q", l.GetValue())
+			}
+			if !model.LabelName(l.GetName()).IsValid() {
+				return fmt.Errorf("invalid label name %q", l.GetName())
+			}
+		}
+	}
+	return nil
+}
+
+// textDecoder implements the Decoder interface for the text protocol.
+type textDecoder struct {
+	r    io.Reader
+	p    TextParser
+	fams []*dto.MetricFamily
+}
+
+// Decode implements the Decoder interface.
+func (d *textDecoder) Decode(v *dto.MetricFamily) error {
+	// TODO(fabxc): Wrap this as a line reader to make streaming safer.
+	if len(d.fams) == 0 {
+		// No cached metric families, read everything and parse metrics.
+		fams, err := d.p.TextToMetricFamilies(d.r)
+		if err != nil {
+			return err
+		}
+		if len(fams) == 0 {
+			return io.EOF
+		}
+		d.fams = make([]*dto.MetricFamily, 0, len(fams))
+		for _, f := range fams {
+			d.fams = append(d.fams, f)
+		}
+	}
+
+	*v = *d.fams[0]
+	d.fams = d.fams[1:]
+
+	return nil
+}
+
+// SampleDecoder wraps a Decoder to extract samples from the metric families
+// decoded by the wrapped Decoder.
+type SampleDecoder struct {
+	Dec  Decoder
+	Opts *DecodeOptions
+
+	f dto.MetricFamily
+}
+
+// Decode calls the Decode method of the wrapped Decoder and then extracts the
+// samples from the decoded MetricFamily into the provided model.Vector.
+func (sd *SampleDecoder) Decode(s *model.Vector) error {
+	err := sd.Dec.Decode(&sd.f)
+	if err != nil {
+		return err
+	}
+	*s, err = extractSamples(&sd.f, sd.Opts)
+	return err
+}
+
+// ExtractSamples builds a slice of samples from the provided metric
+// families. If an error occurrs during sample extraction, it continues to
+// extract from the remaining metric families. The returned error is the last
+// error that has occurred.
+func ExtractSamples(o *DecodeOptions, fams ...*dto.MetricFamily) (model.Vector, error) {
+	var (
+		all     model.Vector
+		lastErr error
+	)
+	for _, f := range fams {
+		some, err := extractSamples(f, o)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		all = append(all, some...)
+	}
+	return all, lastErr
+}
+
+func extractSamples(f *dto.MetricFamily, o *DecodeOptions) (model.Vector, error) {
+	switch f.GetType() {
+	case dto.MetricType_COUNTER:
+		return extractCounter(o, f), nil
+	case dto.MetricType_GAUGE:
+		return extractGauge(o, f), nil
+	case dto.MetricType_SUMMARY:
+		return extractSummary(o, f), nil
+	case dto.MetricType_UNTYPED:
+		return extractUntyped(o, f), nil
+	case dto.MetricType_HISTOGRAM:
+		return extractHistogram(o, f), nil
+	}
+	return nil, fmt.Errorf("expfmt.extractSamples: unknown metric family type %v", f.GetType())
+}
+
+func extractCounter(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
+	samples := make(model.Vector, 0, len(f.Metric))
+
+	for _, m := range f.Metric {
+		if m.Counter == nil {
+			continue
+		}
+
+		lset := make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
+
+		smpl := &model.Sample{
+			Metric: model.Metric(lset),
+			Value:  model.SampleValue(m.Counter.GetValue()),
+		}
+
+		if m.TimestampMs != nil {
+			smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
+		} else {
+			smpl.Timestamp = o.Timestamp
+		}
+
+		samples = append(samples, smpl)
+	}
+
+	return samples
+}
+
+func extractGauge(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
+	samples := make(model.Vector, 0, len(f.Metric))
+
+	for _, m := range f.Metric {
+		if m.Gauge == nil {
+			continue
+		}
+
+		lset := make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
+
+		smpl := &model.Sample{
+			Metric: model.Metric(lset),
+			Value:  model.SampleValue(m.Gauge.GetValue()),
+		}
+
+		if m.TimestampMs != nil {
+			smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
+		} else {
+			smpl.Timestamp = o.Timestamp
+		}
+
+		samples = append(samples, smpl)
+	}
+
+	return samples
+}
+
+func extractUntyped(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
+	samples := make(model.Vector, 0, len(f.Metric))
+
+	for _, m := range f.Metric {
+		if m.Untyped == nil {
+			continue
+		}
+
+		lset := make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
+
+		smpl := &model.Sample{
+			Metric: model.Metric(lset),
+			Value:  model.SampleValue(m.Untyped.GetValue()),
+		}
+
+		if m.TimestampMs != nil {
+			smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
+		} else {
+			smpl.Timestamp = o.Timestamp
+		}
+
+		samples = append(samples, smpl)
+	}
+
+	return samples
+}
+
+func extractSummary(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
+	samples := make(model.Vector, 0, len(f.Metric))
+
+	for _, m := range f.Metric {
+		if m.Summary == nil {
+			continue
+		}
+
+		timestamp := o.Timestamp
+		if m.TimestampMs != nil {
+			timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
+		}
+
+		for _, q := range m.Summary.Quantile {
+			lset := make(model.LabelSet, len(m.Label)+2)
+			for _, p := range m.Label {
+				lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+			}
+			// BUG(matt): Update other names to "quantile".
+			lset[model.LabelName(model.QuantileLabel)] = model.LabelValue(fmt.Sprint(q.GetQuantile()))
+			lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
+
+			samples = append(samples, &model.Sample{
+				Metric:    model.Metric(lset),
+				Value:     model.SampleValue(q.GetValue()),
+				Timestamp: timestamp,
+			})
+		}
+
+		lset := make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
+
+		samples = append(samples, &model.Sample{
+			Metric:    model.Metric(lset),
+			Value:     model.SampleValue(m.Summary.GetSampleSum()),
+			Timestamp: timestamp,
+		})
+
+		lset = make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
+
+		samples = append(samples, &model.Sample{
+			Metric:    model.Metric(lset),
+			Value:     model.SampleValue(m.Summary.GetSampleCount()),
+			Timestamp: timestamp,
+		})
+	}
+
+	return samples
+}
+
+func extractHistogram(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
+	samples := make(model.Vector, 0, len(f.Metric))
+
+	for _, m := range f.Metric {
+		if m.Histogram == nil {
+			continue
+		}
+
+		timestamp := o.Timestamp
+		if m.TimestampMs != nil {
+			timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
+		}
+
+		infSeen := false
+
+		for _, q := range m.Histogram.Bucket {
+			lset := make(model.LabelSet, len(m.Label)+2)
+			for _, p := range m.Label {
+				lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+			}
+			lset[model.LabelName(model.BucketLabel)] = model.LabelValue(fmt.Sprint(q.GetUpperBound()))
+			lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
+
+			if math.IsInf(q.GetUpperBound(), +1) {
+				infSeen = true
+			}
+
+			samples = append(samples, &model.Sample{
+				Metric:    model.Metric(lset),
+				Value:     model.SampleValue(q.GetCumulativeCount()),
+				Timestamp: timestamp,
+			})
+		}
+
+		lset := make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
+
+		samples = append(samples, &model.Sample{
+			Metric:    model.Metric(lset),
+			Value:     model.SampleValue(m.Histogram.GetSampleSum()),
+			Timestamp: timestamp,
+		})
+
+		lset = make(model.LabelSet, len(m.Label)+1)
+		for _, p := range m.Label {
+			lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+		}
+		lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
+
+		count := &model.Sample{
+			Metric:    model.Metric(lset),
+			Value:     model.SampleValue(m.Histogram.GetSampleCount()),
+			Timestamp: timestamp,
+		}
+		samples = append(samples, count)
+
+		if !infSeen {
+			// Append an infinity bucket sample.
+			lset := make(model.LabelSet, len(m.Label)+2)
+			for _, p := range m.Label {
+				lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
+			}
+			lset[model.LabelName(model.BucketLabel)] = model.LabelValue("+Inf")
+			lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
+
+			samples = append(samples, &model.Sample{
+				Metric:    model.Metric(lset),
+				Value:     count.Value,
+				Timestamp: timestamp,
+			})
+		}
+	}
+
+	return samples
+}
diff --git a/vendor/github.com/prometheus/common/expfmt/encode.go b/vendor/github.com/prometheus/common/expfmt/encode.go
new file mode 100644
index 000000000..11839ed65
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/encode.go
@@ -0,0 +1,88 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package expfmt
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/matttproud/golang_protobuf_extensions/pbutil"
+	"github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// Encoder types encode metric families into an underlying wire protocol.
+type Encoder interface {
+	Encode(*dto.MetricFamily) error
+}
+
+type encoder func(*dto.MetricFamily) error
+
+func (e encoder) Encode(v *dto.MetricFamily) error {
+	return e(v)
+}
+
+// Negotiate returns the Content-Type based on the given Accept header.
+// If no appropriate accepted type is found, FmtText is returned.
+func Negotiate(h http.Header) Format {
+	for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
+		// Check for protocol buffer
+		if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol {
+			switch ac.Params["encoding"] {
+			case "delimited":
+				return FmtProtoDelim
+			case "text":
+				return FmtProtoText
+			case "compact-text":
+				return FmtProtoCompact
+			}
+		}
+		// Check for text format.
+		ver := ac.Params["version"]
+		if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
+			return FmtText
+		}
+	}
+	return FmtText
+}
+
+// NewEncoder returns a new encoder based on content type negotiation.
+func NewEncoder(w io.Writer, format Format) Encoder {
+	switch format {
+	case FmtProtoDelim:
+		return encoder(func(v *dto.MetricFamily) error {
+			_, err := pbutil.WriteDelimited(w, v)
+			return err
+		})
+	case FmtProtoCompact:
+		return encoder(func(v *dto.MetricFamily) error {
+			_, err := fmt.Fprintln(w, v.String())
+			return err
+		})
+	case FmtProtoText:
+		return encoder(func(v *dto.MetricFamily) error {
+			_, err := fmt.Fprintln(w, proto.MarshalTextString(v))
+			return err
+		})
+	case FmtText:
+		return encoder(func(v *dto.MetricFamily) error {
+			_, err := MetricFamilyToText(w, v)
+			return err
+		})
+	}
+	panic("expfmt.NewEncoder: unknown format")
+}
diff --git a/vendor/github.com/prometheus/common/expfmt/expfmt.go b/vendor/github.com/prometheus/common/expfmt/expfmt.go
new file mode 100644
index 000000000..c71bcb981
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/expfmt.go
@@ -0,0 +1,38 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package expfmt contains tools for reading and writing Prometheus metrics.
+package expfmt
+
+// Format specifies the HTTP content type of the different wire protocols.
+type Format string
+
+// Constants to assemble the Content-Type values for the different wire protocols.
+const (
+	TextVersion   = "0.0.4"
+	ProtoType     = `application/vnd.google.protobuf`
+	ProtoProtocol = `io.prometheus.client.MetricFamily`
+	ProtoFmt      = ProtoType + "; proto=" + ProtoProtocol + ";"
+
+	// The Content-Type values for the different wire protocols.
+	FmtUnknown      Format = `<unknown>`
+	FmtText         Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
+	FmtProtoDelim   Format = ProtoFmt + ` encoding=delimited`
+	FmtProtoText    Format = ProtoFmt + ` encoding=text`
+	FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
+)
+
+const (
+	hdrContentType = "Content-Type"
+	hdrAccept      = "Accept"
+)
diff --git a/vendor/github.com/prometheus/common/expfmt/fuzz.go b/vendor/github.com/prometheus/common/expfmt/fuzz.go
new file mode 100644
index 000000000..dc2eedeef
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/fuzz.go
@@ -0,0 +1,36 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Build only when actually fuzzing
+// +build gofuzz
+
+package expfmt
+
+import "bytes"
+
+// Fuzz text metric parser with with github.com/dvyukov/go-fuzz:
+//
+//     go-fuzz-build github.com/prometheus/common/expfmt
+//     go-fuzz -bin expfmt-fuzz.zip -workdir fuzz
+//
+// Further input samples should go in the folder fuzz/corpus.
+func Fuzz(in []byte) int {
+	parser := TextParser{}
+	_, err := parser.TextToMetricFamilies(bytes.NewReader(in))
+
+	if err != nil {
+		return 0
+	}
+
+	return 1
+}
diff --git a/vendor/github.com/prometheus/common/expfmt/text_create.go b/vendor/github.com/prometheus/common/expfmt/text_create.go
new file mode 100644
index 000000000..8e473d0fe
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/text_create.go
@@ -0,0 +1,468 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package expfmt
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/prometheus/common/model"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+// enhancedWriter has all the enhanced write functions needed here. bytes.Buffer
+// implements it.
+type enhancedWriter interface {
+	io.Writer
+	WriteRune(r rune) (n int, err error)
+	WriteString(s string) (n int, err error)
+	WriteByte(c byte) error
+}
+
+const (
+	initialBufSize    = 512
+	initialNumBufSize = 24
+)
+
+var (
+	bufPool = sync.Pool{
+		New: func() interface{} {
+			return bytes.NewBuffer(make([]byte, 0, initialBufSize))
+		},
+	}
+	numBufPool = sync.Pool{
+		New: func() interface{} {
+			b := make([]byte, 0, initialNumBufSize)
+			return &b
+		},
+	}
+)
+
+// MetricFamilyToText converts a MetricFamily proto message into text format and
+// writes the resulting lines to 'out'. It returns the number of bytes written
+// and any error encountered. The output will have the same order as the input,
+// no further sorting is performed. Furthermore, this function assumes the input
+// is already sanitized and does not perform any sanity checks. If the input
+// contains duplicate metrics or invalid metric or label names, the conversion
+// will result in invalid text format output.
+//
+// This method fulfills the type 'prometheus.encoder'.
+func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (written int, err error) {
+	// Fail-fast checks.
+	if len(in.Metric) == 0 {
+		return 0, fmt.Errorf("MetricFamily has no metrics: %s", in)
+	}
+	name := in.GetName()
+	if name == "" {
+		return 0, fmt.Errorf("MetricFamily has no name: %s", in)
+	}
+
+	// Try the interface upgrade. If it doesn't work, we'll use a
+	// bytes.Buffer from the sync.Pool and write out its content to out in a
+	// single go in the end.
+	w, ok := out.(enhancedWriter)
+	if !ok {
+		b := bufPool.Get().(*bytes.Buffer)
+		b.Reset()
+		w = b
+		defer func() {
+			bWritten, bErr := out.Write(b.Bytes())
+			written = bWritten
+			if err == nil {
+				err = bErr
+			}
+			bufPool.Put(b)
+		}()
+	}
+
+	var n int
+
+	// Comments, first HELP, then TYPE.
+	if in.Help != nil {
+		n, err = w.WriteString("# HELP ")
+		written += n
+		if err != nil {
+			return
+		}
+		n, err = w.WriteString(name)
+		written += n
+		if err != nil {
+			return
+		}
+		err = w.WriteByte(' ')
+		written++
+		if err != nil {
+			return
+		}
+		n, err = writeEscapedString(w, *in.Help, false)
+		written += n
+		if err != nil {
+			return
+		}
+		err = w.WriteByte('\n')
+		written++
+		if err != nil {
+			return
+		}
+	}
+	n, err = w.WriteString("# TYPE ")
+	written += n
+	if err != nil {
+		return
+	}
+	n, err = w.WriteString(name)
+	written += n
+	if err != nil {
+		return
+	}
+	metricType := in.GetType()
+	switch metricType {
+	case dto.MetricType_COUNTER:
+		n, err = w.WriteString(" counter\n")
+	case dto.MetricType_GAUGE:
+		n, err = w.WriteString(" gauge\n")
+	case dto.MetricType_SUMMARY:
+		n, err = w.WriteString(" summary\n")
+	case dto.MetricType_UNTYPED:
+		n, err = w.WriteString(" untyped\n")
+	case dto.MetricType_HISTOGRAM:
+		n, err = w.WriteString(" histogram\n")
+	default:
+		return written, fmt.Errorf("unknown metric type %s", metricType.String())
+	}
+	written += n
+	if err != nil {
+		return
+	}
+
+	// Finally the samples, one line for each.
+	for _, metric := range in.Metric {
+		switch metricType {
+		case dto.MetricType_COUNTER:
+			if metric.Counter == nil {
+				return written, fmt.Errorf(
+					"expected counter in metric %s %s", name, metric,
+				)
+			}
+			n, err = writeSample(
+				w, name, "", metric, "", 0,
+				metric.Counter.GetValue(),
+			)
+		case dto.MetricType_GAUGE:
+			if metric.Gauge == nil {
+				return written, fmt.Errorf(
+					"expected gauge in metric %s %s", name, metric,
+				)
+			}
+			n, err = writeSample(
+				w, name, "", metric, "", 0,
+				metric.Gauge.GetValue(),
+			)
+		case dto.MetricType_UNTYPED:
+			if metric.Untyped == nil {
+				return written, fmt.Errorf(
+					"expected untyped in metric %s %s", name, metric,
+				)
+			}
+			n, err = writeSample(
+				w, name, "", metric, "", 0,
+				metric.Untyped.GetValue(),
+			)
+		case dto.MetricType_SUMMARY:
+			if metric.Summary == nil {
+				return written, fmt.Errorf(
+					"expected summary in metric %s %s", name, metric,
+				)
+			}
+			for _, q := range metric.Summary.Quantile {
+				n, err = writeSample(
+					w, name, "", metric,
+					model.QuantileLabel, q.GetQuantile(),
+					q.GetValue(),
+				)
+				written += n
+				if err != nil {
+					return
+				}
+			}
+			n, err = writeSample(
+				w, name, "_sum", metric, "", 0,
+				metric.Summary.GetSampleSum(),
+			)
+			written += n
+			if err != nil {
+				return
+			}
+			n, err = writeSample(
+				w, name, "_count", metric, "", 0,
+				float64(metric.Summary.GetSampleCount()),
+			)
+		case dto.MetricType_HISTOGRAM:
+			if metric.Histogram == nil {
+				return written, fmt.Errorf(
+					"expected histogram in metric %s %s", name, metric,
+				)
+			}
+			infSeen := false
+			for _, b := range metric.Histogram.Bucket {
+				n, err = writeSample(
+					w, name, "_bucket", metric,
+					model.BucketLabel, b.GetUpperBound(),
+					float64(b.GetCumulativeCount()),
+				)
+				written += n
+				if err != nil {
+					return
+				}
+				if math.IsInf(b.GetUpperBound(), +1) {
+					infSeen = true
+				}
+			}
+			if !infSeen {
+				n, err = writeSample(
+					w, name, "_bucket", metric,
+					model.BucketLabel, math.Inf(+1),
+					float64(metric.Histogram.GetSampleCount()),
+				)
+				written += n
+				if err != nil {
+					return
+				}
+			}
+			n, err = writeSample(
+				w, name, "_sum", metric, "", 0,
+				metric.Histogram.GetSampleSum(),
+			)
+			written += n
+			if err != nil {
+				return
+			}
+			n, err = writeSample(
+				w, name, "_count", metric, "", 0,
+				float64(metric.Histogram.GetSampleCount()),
+			)
+		default:
+			return written, fmt.Errorf(
+				"unexpected type in metric %s %s", name, metric,
+			)
+		}
+		written += n
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// writeSample writes a single sample in text format to w, given the metric
+// name, the metric proto message itself, optionally an additional label name
+// with a float64 value (use empty string as label name if not required), and
+// the value. The function returns the number of bytes written and any error
+// encountered.
+func writeSample(
+	w enhancedWriter,
+	name, suffix string,
+	metric *dto.Metric,
+	additionalLabelName string, additionalLabelValue float64,
+	value float64,
+) (int, error) {
+	var written int
+	n, err := w.WriteString(name)
+	written += n
+	if err != nil {
+		return written, err
+	}
+	if suffix != "" {
+		n, err = w.WriteString(suffix)
+		written += n
+		if err != nil {
+			return written, err
+		}
+	}
+	n, err = writeLabelPairs(
+		w, metric.Label, additionalLabelName, additionalLabelValue,
+	)
+	written += n
+	if err != nil {
+		return written, err
+	}
+	err = w.WriteByte(' ')
+	written++
+	if err != nil {
+		return written, err
+	}
+	n, err = writeFloat(w, value)
+	written += n
+	if err != nil {
+		return written, err
+	}
+	if metric.TimestampMs != nil {
+		err = w.WriteByte(' ')
+		written++
+		if err != nil {
+			return written, err
+		}
+		n, err = writeInt(w, *metric.TimestampMs)
+		written += n
+		if err != nil {
+			return written, err
+		}
+	}
+	err = w.WriteByte('\n')
+	written++
+	if err != nil {
+		return written, err
+	}
+	return written, nil
+}
+
+// writeLabelPairs converts a slice of LabelPair proto messages plus the
+// explicitly given additional label pair into text formatted as required by the
+// text format and writes it to 'w'. An empty slice in combination with an empty
+// string 'additionalLabelName' results in nothing being written. Otherwise, the
+// label pairs are written, escaped as required by the text format, and enclosed
+// in '{...}'. The function returns the number of bytes written and any error
+// encountered.
+func writeLabelPairs(
+	w enhancedWriter,
+	in []*dto.LabelPair,
+	additionalLabelName string, additionalLabelValue float64,
+) (int, error) {
+	if len(in) == 0 && additionalLabelName == "" {
+		return 0, nil
+	}
+	var (
+		written   int
+		separator byte = '{'
+	)
+	for _, lp := range in {
+		err := w.WriteByte(separator)
+		written++
+		if err != nil {
+			return written, err
+		}
+		n, err := w.WriteString(lp.GetName())
+		written += n
+		if err != nil {
+			return written, err
+		}
+		n, err = w.WriteString(`="`)
+		written += n
+		if err != nil {
+			return written, err
+		}
+		n, err = writeEscapedString(w, lp.GetValue(), true)
+		written += n
+		if err != nil {
+			return written, err
+		}
+		err = w.WriteByte('"')
+		written++
+		if err != nil {
+			return written, err
+		}
+		separator = ','
+	}
+	if additionalLabelName != "" {
+		err := w.WriteByte(separator)
+		written++
+		if err != nil {
+			return written, err
+		}
+		n, err := w.WriteString(additionalLabelName)
+		written += n
+		if err != nil {
+			return written, err
+		}
+		n, err = w.WriteString(`="`)
+		written += n
+		if err != nil {
+			return written, err
+		}
+		n, err = writeFloat(w, additionalLabelValue)
+		written += n
+		if err != nil {
+			return written, err
+		}
+		err = w.WriteByte('"')
+		written++
+		if err != nil {
+			return written, err
+		}
+	}
+	err := w.WriteByte('}')
+	written++
+	if err != nil {
+		return written, err
+	}
+	return written, nil
+}
+
+// writeEscapedString replaces '\' by '\\', new line character by '\n', and - if
+// includeDoubleQuote is true - '"' by '\"'.
+var (
+	escaper       = strings.NewReplacer("\\", `\\`, "\n", `\n`)
+	quotedEscaper = strings.NewReplacer("\\", `\\`, "\n", `\n`, "\"", `\"`)
+)
+
+func writeEscapedString(w enhancedWriter, v string, includeDoubleQuote bool) (int, error) {
+	if includeDoubleQuote {
+		return quotedEscaper.WriteString(w, v)
+	} else {
+		return escaper.WriteString(w, v)
+	}
+}
+
+// writeFloat is equivalent to fmt.Fprint with a float64 argument but hardcodes
+// a few common cases for increased efficiency. For non-hardcoded cases, it uses
+// strconv.AppendFloat to avoid allocations, similar to writeInt.
+func writeFloat(w enhancedWriter, f float64) (int, error) {
+	switch {
+	case f == 1:
+		return 1, w.WriteByte('1')
+	case f == 0:
+		return 1, w.WriteByte('0')
+	case f == -1:
+		return w.WriteString("-1")
+	case math.IsNaN(f):
+		return w.WriteString("NaN")
+	case math.IsInf(f, +1):
+		return w.WriteString("+Inf")
+	case math.IsInf(f, -1):
+		return w.WriteString("-Inf")
+	default:
+		bp := numBufPool.Get().(*[]byte)
+		*bp = strconv.AppendFloat((*bp)[:0], f, 'g', -1, 64)
+		written, err := w.Write(*bp)
+		numBufPool.Put(bp)
+		return written, err
+	}
+}
+
+// writeInt is equivalent to fmt.Fprint with an int64 argument but uses
+// strconv.AppendInt with a byte slice taken from a sync.Pool to avoid
+// allocations.
+func writeInt(w enhancedWriter, i int64) (int, error) {
+	bp := numBufPool.Get().(*[]byte)
+	*bp = strconv.AppendInt((*bp)[:0], i, 10)
+	written, err := w.Write(*bp)
+	numBufPool.Put(bp)
+	return written, err
+}
diff --git a/vendor/github.com/prometheus/common/expfmt/text_parse.go b/vendor/github.com/prometheus/common/expfmt/text_parse.go
new file mode 100644
index 000000000..ec3d86ba7
--- /dev/null
+++ b/vendor/github.com/prometheus/common/expfmt/text_parse.go
@@ -0,0 +1,757 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package expfmt
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+	"strings"
+
+	dto "github.com/prometheus/client_model/go"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/prometheus/common/model"
+)
+
+// A stateFn is a function that represents a state in a state machine. By
+// executing it, the state is progressed to the next state. The stateFn returns
+// another stateFn, which represents the new state. The end state is represented
+// by nil.
+type stateFn func() stateFn
+
+// ParseError signals errors while parsing the simple and flat text-based
+// exchange format.
+type ParseError struct {
+	Line int
+	Msg  string
+}
+
+// Error implements the error interface.
+func (e ParseError) Error() string {
+	return fmt.Sprintf("text format parsing error in line %d: %s", e.Line, e.Msg)
+}
+
+// TextParser is used to parse the simple and flat text-based exchange format. Its
+// zero value is ready to use.
+type TextParser struct {
+	metricFamiliesByName map[string]*dto.MetricFamily
+	buf                  *bufio.Reader // Where the parsed input is read through.
+	err                  error         // Most recent error.
+	lineCount            int           // Tracks the line count for error messages.
+	currentByte          byte          // The most recent byte read.
+	currentToken         bytes.Buffer  // Re-used each time a token has to be gathered from multiple bytes.
+	currentMF            *dto.MetricFamily
+	currentMetric        *dto.Metric
+	currentLabelPair     *dto.LabelPair
+
+	// The remaining member variables are only used for summaries/histograms.
+	currentLabels map[string]string // All labels including '__name__' but excluding 'quantile'/'le'
+	// Summary specific.
+	summaries       map[uint64]*dto.Metric // Key is created with LabelsToSignature.
+	currentQuantile float64
+	// Histogram specific.
+	histograms    map[uint64]*dto.Metric // Key is created with LabelsToSignature.
+	currentBucket float64
+	// These tell us if the currently processed line ends on '_count' or
+	// '_sum' respectively and belong to a summary/histogram, representing the sample
+	// count and sum of that summary/histogram.
+	currentIsSummaryCount, currentIsSummarySum     bool
+	currentIsHistogramCount, currentIsHistogramSum bool
+}
+
+// TextToMetricFamilies reads 'in' as the simple and flat text-based exchange
+// format and creates MetricFamily proto messages. It returns the MetricFamily
+// proto messages in a map where the metric names are the keys, along with any
+// error encountered.
+//
+// If the input contains duplicate metrics (i.e. lines with the same metric name
+// and exactly the same label set), the resulting MetricFamily will contain
+// duplicate Metric proto messages. Similar is true for duplicate label
+// names. Checks for duplicates have to be performed separately, if required.
+// Also note that neither the metrics within each MetricFamily are sorted nor
+// the label pairs within each Metric. Sorting is not required for the most
+// frequent use of this method, which is sample ingestion in the Prometheus
+// server. However, for presentation purposes, you might want to sort the
+// metrics, and in some cases, you must sort the labels, e.g. for consumption by
+// the metric family injection hook of the Prometheus registry.
+//
+// Summaries and histograms are rather special beasts. You would probably not
+// use them in the simple text format anyway. This method can deal with
+// summaries and histograms if they are presented in exactly the way the
+// text.Create function creates them.
+//
+// This method must not be called concurrently. If you want to parse different
+// input concurrently, instantiate a separate Parser for each goroutine.
+func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricFamily, error) {
+	p.reset(in)
+	for nextState := p.startOfLine; nextState != nil; nextState = nextState() {
+		// Magic happens here...
+	}
+	// Get rid of empty metric families.
+	for k, mf := range p.metricFamiliesByName {
+		if len(mf.GetMetric()) == 0 {
+			delete(p.metricFamiliesByName, k)
+		}
+	}
+	// If p.err is io.EOF now, we have run into a premature end of the input
+	// stream. Turn this error into something nicer and more
+	// meaningful. (io.EOF is often used as a signal for the legitimate end
+	// of an input stream.)
+	if p.err == io.EOF {
+		p.parseError("unexpected end of input stream")
+	}
+	return p.metricFamiliesByName, p.err
+}
+
+func (p *TextParser) reset(in io.Reader) {
+	p.metricFamiliesByName = map[string]*dto.MetricFamily{}
+	if p.buf == nil {
+		p.buf = bufio.NewReader(in)
+	} else {
+		p.buf.Reset(in)
+	}
+	p.err = nil
+	p.lineCount = 0
+	if p.summaries == nil || len(p.summaries) > 0 {
+		p.summaries = map[uint64]*dto.Metric{}
+	}
+	if p.histograms == nil || len(p.histograms) > 0 {
+		p.histograms = map[uint64]*dto.Metric{}
+	}
+	p.currentQuantile = math.NaN()
+	p.currentBucket = math.NaN()
+}
+
+// startOfLine represents the state where the next byte read from p.buf is the
+// start of a line (or whitespace leading up to it).
+func (p *TextParser) startOfLine() stateFn {
+	p.lineCount++
+	if p.skipBlankTab(); p.err != nil {
+		// End of input reached. This is the only case where
+		// that is not an error but a signal that we are done.
+		p.err = nil
+		return nil
+	}
+	switch p.currentByte {
+	case '#':
+		return p.startComment
+	case '\n':
+		return p.startOfLine // Empty line, start the next one.
+	}
+	return p.readingMetricName
+}
+
+// startComment represents the state where the next byte read from p.buf is the
+// start of a comment (or whitespace leading up to it).
+func (p *TextParser) startComment() stateFn {
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte == '\n' {
+		return p.startOfLine
+	}
+	if p.readTokenUntilWhitespace(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	// If we have hit the end of line already, there is nothing left
+	// to do. This is not considered a syntax error.
+	if p.currentByte == '\n' {
+		return p.startOfLine
+	}
+	keyword := p.currentToken.String()
+	if keyword != "HELP" && keyword != "TYPE" {
+		// Generic comment, ignore by fast forwarding to end of line.
+		for p.currentByte != '\n' {
+			if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
+				return nil // Unexpected end of input.
+			}
+		}
+		return p.startOfLine
+	}
+	// There is something. Next has to be a metric name.
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.readTokenAsMetricName(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte == '\n' {
+		// At the end of the line already.
+		// Again, this is not considered a syntax error.
+		return p.startOfLine
+	}
+	if !isBlankOrTab(p.currentByte) {
+		p.parseError("invalid metric name in comment")
+		return nil
+	}
+	p.setOrCreateCurrentMF()
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte == '\n' {
+		// At the end of the line already.
+		// Again, this is not considered a syntax error.
+		return p.startOfLine
+	}
+	switch keyword {
+	case "HELP":
+		return p.readingHelp
+	case "TYPE":
+		return p.readingType
+	}
+	panic(fmt.Sprintf("code error: unexpected keyword %q", keyword))
+}
+
+// readingMetricName represents the state where the last byte read (now in
+// p.currentByte) is the first byte of a metric name.
+func (p *TextParser) readingMetricName() stateFn {
+	if p.readTokenAsMetricName(); p.err != nil {
+		return nil
+	}
+	if p.currentToken.Len() == 0 {
+		p.parseError("invalid metric name")
+		return nil
+	}
+	p.setOrCreateCurrentMF()
+	// Now is the time to fix the type if it hasn't happened yet.
+	if p.currentMF.Type == nil {
+		p.currentMF.Type = dto.MetricType_UNTYPED.Enum()
+	}
+	p.currentMetric = &dto.Metric{}
+	// Do not append the newly created currentMetric to
+	// currentMF.Metric right now. First wait if this is a summary,
+	// and the metric exists already, which we can only know after
+	// having read all the labels.
+	if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	return p.readingLabels
+}
+
+// readingLabels represents the state where the last byte read (now in
+// p.currentByte) is either the first byte of the label set (i.e. a '{'), or the
+// first byte of the value (otherwise).
+func (p *TextParser) readingLabels() stateFn {
+	// Summaries/histograms are special. We have to reset the
+	// currentLabels map, currentQuantile and currentBucket before starting to
+	// read labels.
+	if p.currentMF.GetType() == dto.MetricType_SUMMARY || p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
+		p.currentLabels = map[string]string{}
+		p.currentLabels[string(model.MetricNameLabel)] = p.currentMF.GetName()
+		p.currentQuantile = math.NaN()
+		p.currentBucket = math.NaN()
+	}
+	if p.currentByte != '{' {
+		return p.readingValue
+	}
+	return p.startLabelName
+}
+
+// startLabelName represents the state where the next byte read from p.buf is
+// the start of a label name (or whitespace leading up to it).
+func (p *TextParser) startLabelName() stateFn {
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte == '}' {
+		if p.skipBlankTab(); p.err != nil {
+			return nil // Unexpected end of input.
+		}
+		return p.readingValue
+	}
+	if p.readTokenAsLabelName(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentToken.Len() == 0 {
+		p.parseError(fmt.Sprintf("invalid label name for metric %q", p.currentMF.GetName()))
+		return nil
+	}
+	p.currentLabelPair = &dto.LabelPair{Name: proto.String(p.currentToken.String())}
+	if p.currentLabelPair.GetName() == string(model.MetricNameLabel) {
+		p.parseError(fmt.Sprintf("label name %q is reserved", model.MetricNameLabel))
+		return nil
+	}
+	// Special summary/histogram treatment. Don't add 'quantile' and 'le'
+	// labels to 'real' labels.
+	if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == model.QuantileLabel) &&
+		!(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == model.BucketLabel) {
+		p.currentMetric.Label = append(p.currentMetric.Label, p.currentLabelPair)
+	}
+	if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte != '=' {
+		p.parseError(fmt.Sprintf("expected '=' after label name, found %q", p.currentByte))
+		return nil
+	}
+	return p.startLabelValue
+}
+
+// startLabelValue represents the state where the next byte read from p.buf is
+// the start of a (quoted) label value (or whitespace leading up to it).
+func (p *TextParser) startLabelValue() stateFn {
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentByte != '"' {
+		p.parseError(fmt.Sprintf("expected '\"' at start of label value, found %q", p.currentByte))
+		return nil
+	}
+	if p.readTokenAsLabelValue(); p.err != nil {
+		return nil
+	}
+	if !model.LabelValue(p.currentToken.String()).IsValid() {
+		p.parseError(fmt.Sprintf("invalid label value %q", p.currentToken.String()))
+		return nil
+	}
+	p.currentLabelPair.Value = proto.String(p.currentToken.String())
+	// Special treatment of summaries:
+	// - Quantile labels are special, will result in dto.Quantile later.
+	// - Other labels have to be added to currentLabels for signature calculation.
+	if p.currentMF.GetType() == dto.MetricType_SUMMARY {
+		if p.currentLabelPair.GetName() == model.QuantileLabel {
+			if p.currentQuantile, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
+				// Create a more helpful error message.
+				p.parseError(fmt.Sprintf("expected float as value for 'quantile' label, got %q", p.currentLabelPair.GetValue()))
+				return nil
+			}
+		} else {
+			p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
+		}
+	}
+	// Similar special treatment of histograms.
+	if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
+		if p.currentLabelPair.GetName() == model.BucketLabel {
+			if p.currentBucket, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
+				// Create a more helpful error message.
+				p.parseError(fmt.Sprintf("expected float as value for 'le' label, got %q", p.currentLabelPair.GetValue()))
+				return nil
+			}
+		} else {
+			p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
+		}
+	}
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	switch p.currentByte {
+	case ',':
+		return p.startLabelName
+
+	case '}':
+		if p.skipBlankTab(); p.err != nil {
+			return nil // Unexpected end of input.
+		}
+		return p.readingValue
+	default:
+		p.parseError(fmt.Sprintf("unexpected end of label value %q", p.currentLabelPair.GetValue()))
+		return nil
+	}
+}
+
+// readingValue represents the state where the last byte read (now in
+// p.currentByte) is the first byte of the sample value (i.e. a float).
+func (p *TextParser) readingValue() stateFn {
+	// When we are here, we have read all the labels, so for the
+	// special case of a summary/histogram, we can finally find out
+	// if the metric already exists.
+	if p.currentMF.GetType() == dto.MetricType_SUMMARY {
+		signature := model.LabelsToSignature(p.currentLabels)
+		if summary := p.summaries[signature]; summary != nil {
+			p.currentMetric = summary
+		} else {
+			p.summaries[signature] = p.currentMetric
+			p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
+		}
+	} else if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
+		signature := model.LabelsToSignature(p.currentLabels)
+		if histogram := p.histograms[signature]; histogram != nil {
+			p.currentMetric = histogram
+		} else {
+			p.histograms[signature] = p.currentMetric
+			p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
+		}
+	} else {
+		p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
+	}
+	if p.readTokenUntilWhitespace(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	value, err := strconv.ParseFloat(p.currentToken.String(), 64)
+	if err != nil {
+		// Create a more helpful error message.
+		p.parseError(fmt.Sprintf("expected float as value, got %q", p.currentToken.String()))
+		return nil
+	}
+	switch p.currentMF.GetType() {
+	case dto.MetricType_COUNTER:
+		p.currentMetric.Counter = &dto.Counter{Value: proto.Float64(value)}
+	case dto.MetricType_GAUGE:
+		p.currentMetric.Gauge = &dto.Gauge{Value: proto.Float64(value)}
+	case dto.MetricType_UNTYPED:
+		p.currentMetric.Untyped = &dto.Untyped{Value: proto.Float64(value)}
+	case dto.MetricType_SUMMARY:
+		// *sigh*
+		if p.currentMetric.Summary == nil {
+			p.currentMetric.Summary = &dto.Summary{}
+		}
+		switch {
+		case p.currentIsSummaryCount:
+			p.currentMetric.Summary.SampleCount = proto.Uint64(uint64(value))
+		case p.currentIsSummarySum:
+			p.currentMetric.Summary.SampleSum = proto.Float64(value)
+		case !math.IsNaN(p.currentQuantile):
+			p.currentMetric.Summary.Quantile = append(
+				p.currentMetric.Summary.Quantile,
+				&dto.Quantile{
+					Quantile: proto.Float64(p.currentQuantile),
+					Value:    proto.Float64(value),
+				},
+			)
+		}
+	case dto.MetricType_HISTOGRAM:
+		// *sigh*
+		if p.currentMetric.Histogram == nil {
+			p.currentMetric.Histogram = &dto.Histogram{}
+		}
+		switch {
+		case p.currentIsHistogramCount:
+			p.currentMetric.Histogram.SampleCount = proto.Uint64(uint64(value))
+		case p.currentIsHistogramSum:
+			p.currentMetric.Histogram.SampleSum = proto.Float64(value)
+		case !math.IsNaN(p.currentBucket):
+			p.currentMetric.Histogram.Bucket = append(
+				p.currentMetric.Histogram.Bucket,
+				&dto.Bucket{
+					UpperBound:      proto.Float64(p.currentBucket),
+					CumulativeCount: proto.Uint64(uint64(value)),
+				},
+			)
+		}
+	default:
+		p.err = fmt.Errorf("unexpected type for metric name %q", p.currentMF.GetName())
+	}
+	if p.currentByte == '\n' {
+		return p.startOfLine
+	}
+	return p.startTimestamp
+}
+
+// startTimestamp represents the state where the next byte read from p.buf is
+// the start of the timestamp (or whitespace leading up to it).
+func (p *TextParser) startTimestamp() stateFn {
+	if p.skipBlankTab(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.readTokenUntilWhitespace(); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	timestamp, err := strconv.ParseInt(p.currentToken.String(), 10, 64)
+	if err != nil {
+		// Create a more helpful error message.
+		p.parseError(fmt.Sprintf("expected integer as timestamp, got %q", p.currentToken.String()))
+		return nil
+	}
+	p.currentMetric.TimestampMs = proto.Int64(timestamp)
+	if p.readTokenUntilNewline(false); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	if p.currentToken.Len() > 0 {
+		p.parseError(fmt.Sprintf("spurious string after timestamp: %q", p.currentToken.String()))
+		return nil
+	}
+	return p.startOfLine
+}
+
+// readingHelp represents the state where the last byte read (now in
+// p.currentByte) is the first byte of the docstring after 'HELP'.
+func (p *TextParser) readingHelp() stateFn {
+	if p.currentMF.Help != nil {
+		p.parseError(fmt.Sprintf("second HELP line for metric name %q", p.currentMF.GetName()))
+		return nil
+	}
+	// Rest of line is the docstring.
+	if p.readTokenUntilNewline(true); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	p.currentMF.Help = proto.String(p.currentToken.String())
+	return p.startOfLine
+}
+
+// readingType represents the state where the last byte read (now in
+// p.currentByte) is the first byte of the type hint after 'HELP'.
+func (p *TextParser) readingType() stateFn {
+	if p.currentMF.Type != nil {
+		p.parseError(fmt.Sprintf("second TYPE line for metric name %q, or TYPE reported after samples", p.currentMF.GetName()))
+		return nil
+	}
+	// Rest of line is the type.
+	if p.readTokenUntilNewline(false); p.err != nil {
+		return nil // Unexpected end of input.
+	}
+	metricType, ok := dto.MetricType_value[strings.ToUpper(p.currentToken.String())]
+	if !ok {
+		p.parseError(fmt.Sprintf("unknown metric type %q", p.currentToken.String()))
+		return nil
+	}
+	p.currentMF.Type = dto.MetricType(metricType).Enum()
+	return p.startOfLine
+}
+
+// parseError sets p.err to a ParseError at the current line with the given
+// message.
+func (p *TextParser) parseError(msg string) {
+	p.err = ParseError{
+		Line: p.lineCount,
+		Msg:  msg,
+	}
+}
+
+// skipBlankTab reads (and discards) bytes from p.buf until it encounters a byte
+// that is neither ' ' nor '\t'. That byte is left in p.currentByte.
+func (p *TextParser) skipBlankTab() {
+	for {
+		if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil || !isBlankOrTab(p.currentByte) {
+			return
+		}
+	}
+}
+
+// skipBlankTabIfCurrentBlankTab works exactly as skipBlankTab but doesn't do
+// anything if p.currentByte is neither ' ' nor '\t'.
+func (p *TextParser) skipBlankTabIfCurrentBlankTab() {
+	if isBlankOrTab(p.currentByte) {
+		p.skipBlankTab()
+	}
+}
+
+// readTokenUntilWhitespace copies bytes from p.buf into p.currentToken.  The
+// first byte considered is the byte already read (now in p.currentByte).  The
+// first whitespace byte encountered is still copied into p.currentByte, but not
+// into p.currentToken.
+func (p *TextParser) readTokenUntilWhitespace() {
+	p.currentToken.Reset()
+	for p.err == nil && !isBlankOrTab(p.currentByte) && p.currentByte != '\n' {
+		p.currentToken.WriteByte(p.currentByte)
+		p.currentByte, p.err = p.buf.ReadByte()
+	}
+}
+
+// readTokenUntilNewline copies bytes from p.buf into p.currentToken.  The first
+// byte considered is the byte already read (now in p.currentByte).  The first
+// newline byte encountered is still copied into p.currentByte, but not into
+// p.currentToken. If recognizeEscapeSequence is true, two escape sequences are
+// recognized: '\\' translates into '\', and '\n' into a line-feed character.
+// All other escape sequences are invalid and cause an error.
+func (p *TextParser) readTokenUntilNewline(recognizeEscapeSequence bool) {
+	p.currentToken.Reset()
+	escaped := false
+	for p.err == nil {
+		if recognizeEscapeSequence && escaped {
+			switch p.currentByte {
+			case '\\':
+				p.currentToken.WriteByte(p.currentByte)
+			case 'n':
+				p.currentToken.WriteByte('\n')
+			default:
+				p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
+				return
+			}
+			escaped = false
+		} else {
+			switch p.currentByte {
+			case '\n':
+				return
+			case '\\':
+				escaped = true
+			default:
+				p.currentToken.WriteByte(p.currentByte)
+			}
+		}
+		p.currentByte, p.err = p.buf.ReadByte()
+	}
+}
+
+// readTokenAsMetricName copies a metric name from p.buf into p.currentToken.
+// The first byte considered is the byte already read (now in p.currentByte).
+// The first byte not part of a metric name is still copied into p.currentByte,
+// but not into p.currentToken.
+func (p *TextParser) readTokenAsMetricName() {
+	p.currentToken.Reset()
+	if !isValidMetricNameStart(p.currentByte) {
+		return
+	}
+	for {
+		p.currentToken.WriteByte(p.currentByte)
+		p.currentByte, p.err = p.buf.ReadByte()
+		if p.err != nil || !isValidMetricNameContinuation(p.currentByte) {
+			return
+		}
+	}
+}
+
+// readTokenAsLabelName copies a label name from p.buf into p.currentToken.
+// The first byte considered is the byte already read (now in p.currentByte).
+// The first byte not part of a label name is still copied into p.currentByte,
+// but not into p.currentToken.
+func (p *TextParser) readTokenAsLabelName() {
+	p.currentToken.Reset()
+	if !isValidLabelNameStart(p.currentByte) {
+		return
+	}
+	for {
+		p.currentToken.WriteByte(p.currentByte)
+		p.currentByte, p.err = p.buf.ReadByte()
+		if p.err != nil || !isValidLabelNameContinuation(p.currentByte) {
+			return
+		}
+	}
+}
+
+// readTokenAsLabelValue copies a label value from p.buf into p.currentToken.
+// In contrast to the other 'readTokenAs...' functions, which start with the
+// last read byte in p.currentByte, this method ignores p.currentByte and starts
+// with reading a new byte from p.buf. The first byte not part of a label value
+// is still copied into p.currentByte, but not into p.currentToken.
+func (p *TextParser) readTokenAsLabelValue() {
+	p.currentToken.Reset()
+	escaped := false
+	for {
+		if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
+			return
+		}
+		if escaped {
+			switch p.currentByte {
+			case '"', '\\':
+				p.currentToken.WriteByte(p.currentByte)
+			case 'n':
+				p.currentToken.WriteByte('\n')
+			default:
+				p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
+				return
+			}
+			escaped = false
+			continue
+		}
+		switch p.currentByte {
+		case '"':
+			return
+		case '\n':
+			p.parseError(fmt.Sprintf("label value %q contains unescaped new-line", p.currentToken.String()))
+			return
+		case '\\':
+			escaped = true
+		default:
+			p.currentToken.WriteByte(p.currentByte)
+		}
+	}
+}
+
+func (p *TextParser) setOrCreateCurrentMF() {
+	p.currentIsSummaryCount = false
+	p.currentIsSummarySum = false
+	p.currentIsHistogramCount = false
+	p.currentIsHistogramSum = false
+	name := p.currentToken.String()
+	if p.currentMF = p.metricFamiliesByName[name]; p.currentMF != nil {
+		return
+	}
+	// Try out if this is a _sum or _count for a summary/histogram.
+	summaryName := summaryMetricName(name)
+	if p.currentMF = p.metricFamiliesByName[summaryName]; p.currentMF != nil {
+		if p.currentMF.GetType() == dto.MetricType_SUMMARY {
+			if isCount(name) {
+				p.currentIsSummaryCount = true
+			}
+			if isSum(name) {
+				p.currentIsSummarySum = true
+			}
+			return
+		}
+	}
+	histogramName := histogramMetricName(name)
+	if p.currentMF = p.metricFamiliesByName[histogramName]; p.currentMF != nil {
+		if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
+			if isCount(name) {
+				p.currentIsHistogramCount = true
+			}
+			if isSum(name) {
+				p.currentIsHistogramSum = true
+			}
+			return
+		}
+	}
+	p.currentMF = &dto.MetricFamily{Name: proto.String(name)}
+	p.metricFamiliesByName[name] = p.currentMF
+}
+
+func isValidLabelNameStart(b byte) bool {
+	return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_'
+}
+
+func isValidLabelNameContinuation(b byte) bool {
+	return isValidLabelNameStart(b) || (b >= '0' && b <= '9')
+}
+
+func isValidMetricNameStart(b byte) bool {
+	return isValidLabelNameStart(b) || b == ':'
+}
+
+func isValidMetricNameContinuation(b byte) bool {
+	return isValidLabelNameContinuation(b) || b == ':'
+}
+
+func isBlankOrTab(b byte) bool {
+	return b == ' ' || b == '\t'
+}
+
+func isCount(name string) bool {
+	return len(name) > 6 && name[len(name)-6:] == "_count"
+}
+
+func isSum(name string) bool {
+	return len(name) > 4 && name[len(name)-4:] == "_sum"
+}
+
+func isBucket(name string) bool {
+	return len(name) > 7 && name[len(name)-7:] == "_bucket"
+}
+
+func summaryMetricName(name string) string {
+	switch {
+	case isCount(name):
+		return name[:len(name)-6]
+	case isSum(name):
+		return name[:len(name)-4]
+	default:
+		return name
+	}
+}
+
+func histogramMetricName(name string) string {
+	switch {
+	case isCount(name):
+		return name[:len(name)-6]
+	case isSum(name):
+		return name[:len(name)-4]
+	case isBucket(name):
+		return name[:len(name)-7]
+	default:
+		return name
+	}
+}
diff --git a/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt
new file mode 100644
index 000000000..7723656d5
--- /dev/null
+++ b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/README.txt
@@ -0,0 +1,67 @@
+PACKAGE
+
+package goautoneg
+import "bitbucket.org/ww/goautoneg"
+
+HTTP Content-Type Autonegotiation.
+
+The functions in this package implement the behaviour specified in
+http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
+
+Copyright (c) 2011, Open Knowledge Foundation Ltd.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+
+    Neither the name of the Open Knowledge Foundation Ltd. nor the
+    names of its contributors may be used to endorse or promote
+    products derived from this software without specific prior written
+    permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+FUNCTIONS
+
+func Negotiate(header string, alternatives []string) (content_type string)
+Negotiate the most appropriate content_type given the accept header
+and a list of alternatives.
+
+func ParseAccept(header string) (accept []Accept)
+Parse an Accept Header string returning a sorted list
+of clauses
+
+
+TYPES
+
+type Accept struct {
+    Type, SubType string
+    Q             float32
+    Params        map[string]string
+}
+Structure to represent a clause in an HTTP Accept Header
+
+
+SUBDIRECTORIES
+
+	.hg
diff --git a/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go
new file mode 100644
index 000000000..26e92288c
--- /dev/null
+++ b/vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go
@@ -0,0 +1,162 @@
+/*
+Copyright (c) 2011, Open Knowledge Foundation Ltd.
+All rights reserved.
+
+HTTP Content-Type Autonegotiation.
+
+The functions in this package implement the behaviour specified in
+http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+
+    Neither the name of the Open Knowledge Foundation Ltd. nor the
+    names of its contributors may be used to endorse or promote
+    products derived from this software without specific prior written
+    permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+*/
+package goautoneg
+
+import (
+	"sort"
+	"strconv"
+	"strings"
+)
+
+// Structure to represent a clause in an HTTP Accept Header
+type Accept struct {
+	Type, SubType string
+	Q             float64
+	Params        map[string]string
+}
+
+// For internal use, so that we can use the sort interface
+type accept_slice []Accept
+
+func (accept accept_slice) Len() int {
+	slice := []Accept(accept)
+	return len(slice)
+}
+
+func (accept accept_slice) Less(i, j int) bool {
+	slice := []Accept(accept)
+	ai, aj := slice[i], slice[j]
+	if ai.Q > aj.Q {
+		return true
+	}
+	if ai.Type != "*" && aj.Type == "*" {
+		return true
+	}
+	if ai.SubType != "*" && aj.SubType == "*" {
+		return true
+	}
+	return false
+}
+
+func (accept accept_slice) Swap(i, j int) {
+	slice := []Accept(accept)
+	slice[i], slice[j] = slice[j], slice[i]
+}
+
+// Parse an Accept Header string returning a sorted list
+// of clauses
+func ParseAccept(header string) (accept []Accept) {
+	parts := strings.Split(header, ",")
+	accept = make([]Accept, 0, len(parts))
+	for _, part := range parts {
+		part := strings.Trim(part, " ")
+
+		a := Accept{}
+		a.Params = make(map[string]string)
+		a.Q = 1.0
+
+		mrp := strings.Split(part, ";")
+
+		media_range := mrp[0]
+		sp := strings.Split(media_range, "/")
+		a.Type = strings.Trim(sp[0], " ")
+
+		switch {
+		case len(sp) == 1 && a.Type == "*":
+			a.SubType = "*"
+		case len(sp) == 2:
+			a.SubType = strings.Trim(sp[1], " ")
+		default:
+			continue
+		}
+
+		if len(mrp) == 1 {
+			accept = append(accept, a)
+			continue
+		}
+
+		for _, param := range mrp[1:] {
+			sp := strings.SplitN(param, "=", 2)
+			if len(sp) != 2 {
+				continue
+			}
+			token := strings.Trim(sp[0], " ")
+			if token == "q" {
+				a.Q, _ = strconv.ParseFloat(sp[1], 32)
+			} else {
+				a.Params[token] = strings.Trim(sp[1], " ")
+			}
+		}
+
+		accept = append(accept, a)
+	}
+
+	slice := accept_slice(accept)
+	sort.Sort(slice)
+
+	return
+}
+
+// Negotiate the most appropriate content_type given the accept header
+// and a list of alternatives.
+func Negotiate(header string, alternatives []string) (content_type string) {
+	asp := make([][]string, 0, len(alternatives))
+	for _, ctype := range alternatives {
+		asp = append(asp, strings.SplitN(ctype, "/", 2))
+	}
+	for _, clause := range ParseAccept(header) {
+		for i, ctsp := range asp {
+			if clause.Type == ctsp[0] && clause.SubType == ctsp[1] {
+				content_type = alternatives[i]
+				return
+			}
+			if clause.Type == ctsp[0] && clause.SubType == "*" {
+				content_type = alternatives[i]
+				return
+			}
+			if clause.Type == "*" && clause.SubType == "*" {
+				content_type = alternatives[i]
+				return
+			}
+		}
+	}
+	return
+}
diff --git a/vendor/github.com/prometheus/common/model/alert.go b/vendor/github.com/prometheus/common/model/alert.go
new file mode 100644
index 000000000..35e739c7a
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/alert.go
@@ -0,0 +1,136 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"fmt"
+	"time"
+)
+
+type AlertStatus string
+
+const (
+	AlertFiring   AlertStatus = "firing"
+	AlertResolved AlertStatus = "resolved"
+)
+
+// Alert is a generic representation of an alert in the Prometheus eco-system.
+type Alert struct {
+	// Label value pairs for purpose of aggregation, matching, and disposition
+	// dispatching. This must minimally include an "alertname" label.
+	Labels LabelSet `json:"labels"`
+
+	// Extra key/value information which does not define alert identity.
+	Annotations LabelSet `json:"annotations"`
+
+	// The known time range for this alert. Both ends are optional.
+	StartsAt     time.Time `json:"startsAt,omitempty"`
+	EndsAt       time.Time `json:"endsAt,omitempty"`
+	GeneratorURL string    `json:"generatorURL"`
+}
+
+// Name returns the name of the alert. It is equivalent to the "alertname" label.
+func (a *Alert) Name() string {
+	return string(a.Labels[AlertNameLabel])
+}
+
+// Fingerprint returns a unique hash for the alert. It is equivalent to
+// the fingerprint of the alert's label set.
+func (a *Alert) Fingerprint() Fingerprint {
+	return a.Labels.Fingerprint()
+}
+
+func (a *Alert) String() string {
+	s := fmt.Sprintf("%s[%s]", a.Name(), a.Fingerprint().String()[:7])
+	if a.Resolved() {
+		return s + "[resolved]"
+	}
+	return s + "[active]"
+}
+
+// Resolved returns true iff the activity interval ended in the past.
+func (a *Alert) Resolved() bool {
+	return a.ResolvedAt(time.Now())
+}
+
+// ResolvedAt returns true off the activity interval ended before
+// the given timestamp.
+func (a *Alert) ResolvedAt(ts time.Time) bool {
+	if a.EndsAt.IsZero() {
+		return false
+	}
+	return !a.EndsAt.After(ts)
+}
+
+// Status returns the status of the alert.
+func (a *Alert) Status() AlertStatus {
+	if a.Resolved() {
+		return AlertResolved
+	}
+	return AlertFiring
+}
+
+// Validate checks whether the alert data is inconsistent.
+func (a *Alert) Validate() error {
+	if a.StartsAt.IsZero() {
+		return fmt.Errorf("start time missing")
+	}
+	if !a.EndsAt.IsZero() && a.EndsAt.Before(a.StartsAt) {
+		return fmt.Errorf("start time must be before end time")
+	}
+	if err := a.Labels.Validate(); err != nil {
+		return fmt.Errorf("invalid label set: %s", err)
+	}
+	if len(a.Labels) == 0 {
+		return fmt.Errorf("at least one label pair required")
+	}
+	if err := a.Annotations.Validate(); err != nil {
+		return fmt.Errorf("invalid annotations: %s", err)
+	}
+	return nil
+}
+
+// Alert is a list of alerts that can be sorted in chronological order.
+type Alerts []*Alert
+
+func (as Alerts) Len() int      { return len(as) }
+func (as Alerts) Swap(i, j int) { as[i], as[j] = as[j], as[i] }
+
+func (as Alerts) Less(i, j int) bool {
+	if as[i].StartsAt.Before(as[j].StartsAt) {
+		return true
+	}
+	if as[i].EndsAt.Before(as[j].EndsAt) {
+		return true
+	}
+	return as[i].Fingerprint() < as[j].Fingerprint()
+}
+
+// HasFiring returns true iff one of the alerts is not resolved.
+func (as Alerts) HasFiring() bool {
+	for _, a := range as {
+		if !a.Resolved() {
+			return true
+		}
+	}
+	return false
+}
+
+// Status returns StatusFiring iff at least one of the alerts is firing.
+func (as Alerts) Status() AlertStatus {
+	if as.HasFiring() {
+		return AlertFiring
+	}
+	return AlertResolved
+}
diff --git a/vendor/github.com/prometheus/common/model/fingerprinting.go b/vendor/github.com/prometheus/common/model/fingerprinting.go
new file mode 100644
index 000000000..fc4de4106
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/fingerprinting.go
@@ -0,0 +1,105 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// Fingerprint provides a hash-capable representation of a Metric.
+// For our purposes, FNV-1A 64-bit is used.
+type Fingerprint uint64
+
+// FingerprintFromString transforms a string representation into a Fingerprint.
+func FingerprintFromString(s string) (Fingerprint, error) {
+	num, err := strconv.ParseUint(s, 16, 64)
+	return Fingerprint(num), err
+}
+
+// ParseFingerprint parses the input string into a fingerprint.
+func ParseFingerprint(s string) (Fingerprint, error) {
+	num, err := strconv.ParseUint(s, 16, 64)
+	if err != nil {
+		return 0, err
+	}
+	return Fingerprint(num), nil
+}
+
+func (f Fingerprint) String() string {
+	return fmt.Sprintf("%016x", uint64(f))
+}
+
+// Fingerprints represents a collection of Fingerprint subject to a given
+// natural sorting scheme. It implements sort.Interface.
+type Fingerprints []Fingerprint
+
+// Len implements sort.Interface.
+func (f Fingerprints) Len() int {
+	return len(f)
+}
+
+// Less implements sort.Interface.
+func (f Fingerprints) Less(i, j int) bool {
+	return f[i] < f[j]
+}
+
+// Swap implements sort.Interface.
+func (f Fingerprints) Swap(i, j int) {
+	f[i], f[j] = f[j], f[i]
+}
+
+// FingerprintSet is a set of Fingerprints.
+type FingerprintSet map[Fingerprint]struct{}
+
+// Equal returns true if both sets contain the same elements (and not more).
+func (s FingerprintSet) Equal(o FingerprintSet) bool {
+	if len(s) != len(o) {
+		return false
+	}
+
+	for k := range s {
+		if _, ok := o[k]; !ok {
+			return false
+		}
+	}
+
+	return true
+}
+
+// Intersection returns the elements contained in both sets.
+func (s FingerprintSet) Intersection(o FingerprintSet) FingerprintSet {
+	myLength, otherLength := len(s), len(o)
+	if myLength == 0 || otherLength == 0 {
+		return FingerprintSet{}
+	}
+
+	subSet := s
+	superSet := o
+
+	if otherLength < myLength {
+		subSet = o
+		superSet = s
+	}
+
+	out := FingerprintSet{}
+
+	for k := range subSet {
+		if _, ok := superSet[k]; ok {
+			out[k] = struct{}{}
+		}
+	}
+
+	return out
+}
diff --git a/vendor/github.com/prometheus/common/model/fnv.go b/vendor/github.com/prometheus/common/model/fnv.go
new file mode 100644
index 000000000..038fc1c90
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/fnv.go
@@ -0,0 +1,42 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+// Inline and byte-free variant of hash/fnv's fnv64a.
+
+const (
+	offset64 = 14695981039346656037
+	prime64  = 1099511628211
+)
+
+// hashNew initializies a new fnv64a hash value.
+func hashNew() uint64 {
+	return offset64
+}
+
+// hashAdd adds a string to a fnv64a hash value, returning the updated hash.
+func hashAdd(h uint64, s string) uint64 {
+	for i := 0; i < len(s); i++ {
+		h ^= uint64(s[i])
+		h *= prime64
+	}
+	return h
+}
+
+// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash.
+func hashAddByte(h uint64, b byte) uint64 {
+	h ^= uint64(b)
+	h *= prime64
+	return h
+}
diff --git a/vendor/github.com/prometheus/common/model/labels.go b/vendor/github.com/prometheus/common/model/labels.go
new file mode 100644
index 000000000..41051a01a
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/labels.go
@@ -0,0 +1,210 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode/utf8"
+)
+
+const (
+	// AlertNameLabel is the name of the label containing the an alert's name.
+	AlertNameLabel = "alertname"
+
+	// ExportedLabelPrefix is the prefix to prepend to the label names present in
+	// exported metrics if a label of the same name is added by the server.
+	ExportedLabelPrefix = "exported_"
+
+	// MetricNameLabel is the label name indicating the metric name of a
+	// timeseries.
+	MetricNameLabel = "__name__"
+
+	// SchemeLabel is the name of the label that holds the scheme on which to
+	// scrape a target.
+	SchemeLabel = "__scheme__"
+
+	// AddressLabel is the name of the label that holds the address of
+	// a scrape target.
+	AddressLabel = "__address__"
+
+	// MetricsPathLabel is the name of the label that holds the path on which to
+	// scrape a target.
+	MetricsPathLabel = "__metrics_path__"
+
+	// ReservedLabelPrefix is a prefix which is not legal in user-supplied
+	// label names.
+	ReservedLabelPrefix = "__"
+
+	// MetaLabelPrefix is a prefix for labels that provide meta information.
+	// Labels with this prefix are used for intermediate label processing and
+	// will not be attached to time series.
+	MetaLabelPrefix = "__meta_"
+
+	// TmpLabelPrefix is a prefix for temporary labels as part of relabelling.
+	// Labels with this prefix are used for intermediate label processing and
+	// will not be attached to time series. This is reserved for use in
+	// Prometheus configuration files by users.
+	TmpLabelPrefix = "__tmp_"
+
+	// ParamLabelPrefix is a prefix for labels that provide URL parameters
+	// used to scrape a target.
+	ParamLabelPrefix = "__param_"
+
+	// JobLabel is the label name indicating the job from which a timeseries
+	// was scraped.
+	JobLabel = "job"
+
+	// InstanceLabel is the label name used for the instance label.
+	InstanceLabel = "instance"
+
+	// BucketLabel is used for the label that defines the upper bound of a
+	// bucket of a histogram ("le" -> "less or equal").
+	BucketLabel = "le"
+
+	// QuantileLabel is used for the label that defines the quantile in a
+	// summary.
+	QuantileLabel = "quantile"
+)
+
+// LabelNameRE is a regular expression matching valid label names. Note that the
+// IsValid method of LabelName performs the same check but faster than a match
+// with this regular expression.
+var LabelNameRE = regexp.MustCompile("^[a-zA-Z_][a-zA-Z0-9_]*$")
+
+// A LabelName is a key for a LabelSet or Metric.  It has a value associated
+// therewith.
+type LabelName string
+
+// IsValid is true iff the label name matches the pattern of LabelNameRE. This
+// method, however, does not use LabelNameRE for the check but a much faster
+// hardcoded implementation.
+func (ln LabelName) IsValid() bool {
+	if len(ln) == 0 {
+		return false
+	}
+	for i, b := range ln {
+		if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || (b >= '0' && b <= '9' && i > 0)) {
+			return false
+		}
+	}
+	return true
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaler interface.
+func (ln *LabelName) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var s string
+	if err := unmarshal(&s); err != nil {
+		return err
+	}
+	if !LabelName(s).IsValid() {
+		return fmt.Errorf("%q is not a valid label name", s)
+	}
+	*ln = LabelName(s)
+	return nil
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (ln *LabelName) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	if !LabelName(s).IsValid() {
+		return fmt.Errorf("%q is not a valid label name", s)
+	}
+	*ln = LabelName(s)
+	return nil
+}
+
+// LabelNames is a sortable LabelName slice. In implements sort.Interface.
+type LabelNames []LabelName
+
+func (l LabelNames) Len() int {
+	return len(l)
+}
+
+func (l LabelNames) Less(i, j int) bool {
+	return l[i] < l[j]
+}
+
+func (l LabelNames) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}
+
+func (l LabelNames) String() string {
+	labelStrings := make([]string, 0, len(l))
+	for _, label := range l {
+		labelStrings = append(labelStrings, string(label))
+	}
+	return strings.Join(labelStrings, ", ")
+}
+
+// A LabelValue is an associated value for a LabelName.
+type LabelValue string
+
+// IsValid returns true iff the string is a valid UTF8.
+func (lv LabelValue) IsValid() bool {
+	return utf8.ValidString(string(lv))
+}
+
+// LabelValues is a sortable LabelValue slice. It implements sort.Interface.
+type LabelValues []LabelValue
+
+func (l LabelValues) Len() int {
+	return len(l)
+}
+
+func (l LabelValues) Less(i, j int) bool {
+	return string(l[i]) < string(l[j])
+}
+
+func (l LabelValues) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}
+
+// LabelPair pairs a name with a value.
+type LabelPair struct {
+	Name  LabelName
+	Value LabelValue
+}
+
+// LabelPairs is a sortable slice of LabelPair pointers. It implements
+// sort.Interface.
+type LabelPairs []*LabelPair
+
+func (l LabelPairs) Len() int {
+	return len(l)
+}
+
+func (l LabelPairs) Less(i, j int) bool {
+	switch {
+	case l[i].Name > l[j].Name:
+		return false
+	case l[i].Name < l[j].Name:
+		return true
+	case l[i].Value > l[j].Value:
+		return false
+	case l[i].Value < l[j].Value:
+		return true
+	default:
+		return false
+	}
+}
+
+func (l LabelPairs) Swap(i, j int) {
+	l[i], l[j] = l[j], l[i]
+}
diff --git a/vendor/github.com/prometheus/common/model/labelset.go b/vendor/github.com/prometheus/common/model/labelset.go
new file mode 100644
index 000000000..6eda08a73
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/labelset.go
@@ -0,0 +1,169 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// A LabelSet is a collection of LabelName and LabelValue pairs.  The LabelSet
+// may be fully-qualified down to the point where it may resolve to a single
+// Metric in the data store or not.  All operations that occur within the realm
+// of a LabelSet can emit a vector of Metric entities to which the LabelSet may
+// match.
+type LabelSet map[LabelName]LabelValue
+
+// Validate checks whether all names and values in the label set
+// are valid.
+func (ls LabelSet) Validate() error {
+	for ln, lv := range ls {
+		if !ln.IsValid() {
+			return fmt.Errorf("invalid name %q", ln)
+		}
+		if !lv.IsValid() {
+			return fmt.Errorf("invalid value %q", lv)
+		}
+	}
+	return nil
+}
+
+// Equal returns true iff both label sets have exactly the same key/value pairs.
+func (ls LabelSet) Equal(o LabelSet) bool {
+	if len(ls) != len(o) {
+		return false
+	}
+	for ln, lv := range ls {
+		olv, ok := o[ln]
+		if !ok {
+			return false
+		}
+		if olv != lv {
+			return false
+		}
+	}
+	return true
+}
+
+// Before compares the metrics, using the following criteria:
+//
+// If m has fewer labels than o, it is before o. If it has more, it is not.
+//
+// If the number of labels is the same, the superset of all label names is
+// sorted alphanumerically. The first differing label pair found in that order
+// determines the outcome: If the label does not exist at all in m, then m is
+// before o, and vice versa. Otherwise the label value is compared
+// alphanumerically.
+//
+// If m and o are equal, the method returns false.
+func (ls LabelSet) Before(o LabelSet) bool {
+	if len(ls) < len(o) {
+		return true
+	}
+	if len(ls) > len(o) {
+		return false
+	}
+
+	lns := make(LabelNames, 0, len(ls)+len(o))
+	for ln := range ls {
+		lns = append(lns, ln)
+	}
+	for ln := range o {
+		lns = append(lns, ln)
+	}
+	// It's probably not worth it to de-dup lns.
+	sort.Sort(lns)
+	for _, ln := range lns {
+		mlv, ok := ls[ln]
+		if !ok {
+			return true
+		}
+		olv, ok := o[ln]
+		if !ok {
+			return false
+		}
+		if mlv < olv {
+			return true
+		}
+		if mlv > olv {
+			return false
+		}
+	}
+	return false
+}
+
+// Clone returns a copy of the label set.
+func (ls LabelSet) Clone() LabelSet {
+	lsn := make(LabelSet, len(ls))
+	for ln, lv := range ls {
+		lsn[ln] = lv
+	}
+	return lsn
+}
+
+// Merge is a helper function to non-destructively merge two label sets.
+func (l LabelSet) Merge(other LabelSet) LabelSet {
+	result := make(LabelSet, len(l))
+
+	for k, v := range l {
+		result[k] = v
+	}
+
+	for k, v := range other {
+		result[k] = v
+	}
+
+	return result
+}
+
+func (l LabelSet) String() string {
+	lstrs := make([]string, 0, len(l))
+	for l, v := range l {
+		lstrs = append(lstrs, fmt.Sprintf("%s=%q", l, v))
+	}
+
+	sort.Strings(lstrs)
+	return fmt.Sprintf("{%s}", strings.Join(lstrs, ", "))
+}
+
+// Fingerprint returns the LabelSet's fingerprint.
+func (ls LabelSet) Fingerprint() Fingerprint {
+	return labelSetToFingerprint(ls)
+}
+
+// FastFingerprint returns the LabelSet's Fingerprint calculated by a faster hashing
+// algorithm, which is, however, more susceptible to hash collisions.
+func (ls LabelSet) FastFingerprint() Fingerprint {
+	return labelSetToFastFingerprint(ls)
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (l *LabelSet) UnmarshalJSON(b []byte) error {
+	var m map[LabelName]LabelValue
+	if err := json.Unmarshal(b, &m); err != nil {
+		return err
+	}
+	// encoding/json only unmarshals maps of the form map[string]T. It treats
+	// LabelName as a string and does not call its UnmarshalJSON method.
+	// Thus, we have to replicate the behavior here.
+	for ln := range m {
+		if !ln.IsValid() {
+			return fmt.Errorf("%q is not a valid label name", ln)
+		}
+	}
+	*l = LabelSet(m)
+	return nil
+}
diff --git a/vendor/github.com/prometheus/common/model/metric.go b/vendor/github.com/prometheus/common/model/metric.go
new file mode 100644
index 000000000..00804b7fe
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/metric.go
@@ -0,0 +1,102 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"fmt"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+var (
+	// MetricNameRE is a regular expression matching valid metric
+	// names. Note that the IsValidMetricName function performs the same
+	// check but faster than a match with this regular expression.
+	MetricNameRE = regexp.MustCompile(`^[a-zA-Z_:][a-zA-Z0-9_:]*$`)
+)
+
+// A Metric is similar to a LabelSet, but the key difference is that a Metric is
+// a singleton and refers to one and only one stream of samples.
+type Metric LabelSet
+
+// Equal compares the metrics.
+func (m Metric) Equal(o Metric) bool {
+	return LabelSet(m).Equal(LabelSet(o))
+}
+
+// Before compares the metrics' underlying label sets.
+func (m Metric) Before(o Metric) bool {
+	return LabelSet(m).Before(LabelSet(o))
+}
+
+// Clone returns a copy of the Metric.
+func (m Metric) Clone() Metric {
+	clone := make(Metric, len(m))
+	for k, v := range m {
+		clone[k] = v
+	}
+	return clone
+}
+
+func (m Metric) String() string {
+	metricName, hasName := m[MetricNameLabel]
+	numLabels := len(m) - 1
+	if !hasName {
+		numLabels = len(m)
+	}
+	labelStrings := make([]string, 0, numLabels)
+	for label, value := range m {
+		if label != MetricNameLabel {
+			labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
+		}
+	}
+
+	switch numLabels {
+	case 0:
+		if hasName {
+			return string(metricName)
+		}
+		return "{}"
+	default:
+		sort.Strings(labelStrings)
+		return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ", "))
+	}
+}
+
+// Fingerprint returns a Metric's Fingerprint.
+func (m Metric) Fingerprint() Fingerprint {
+	return LabelSet(m).Fingerprint()
+}
+
+// FastFingerprint returns a Metric's Fingerprint calculated by a faster hashing
+// algorithm, which is, however, more susceptible to hash collisions.
+func (m Metric) FastFingerprint() Fingerprint {
+	return LabelSet(m).FastFingerprint()
+}
+
+// IsValidMetricName returns true iff name matches the pattern of MetricNameRE.
+// This function, however, does not use MetricNameRE for the check but a much
+// faster hardcoded implementation.
+func IsValidMetricName(n LabelValue) bool {
+	if len(n) == 0 {
+		return false
+	}
+	for i, b := range n {
+		if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == ':' || (b >= '0' && b <= '9' && i > 0)) {
+			return false
+		}
+	}
+	return true
+}
diff --git a/vendor/github.com/prometheus/common/model/model.go b/vendor/github.com/prometheus/common/model/model.go
new file mode 100644
index 000000000..a7b969170
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/model.go
@@ -0,0 +1,16 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package model contains common data structures that are shared across
+// Prometheus components and libraries.
+package model
diff --git a/vendor/github.com/prometheus/common/model/signature.go b/vendor/github.com/prometheus/common/model/signature.go
new file mode 100644
index 000000000..8762b13c6
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/signature.go
@@ -0,0 +1,144 @@
+// Copyright 2014 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"sort"
+)
+
+// SeparatorByte is a byte that cannot occur in valid UTF-8 sequences and is
+// used to separate label names, label values, and other strings from each other
+// when calculating their combined hash value (aka signature aka fingerprint).
+const SeparatorByte byte = 255
+
+var (
+	// cache the signature of an empty label set.
+	emptyLabelSignature = hashNew()
+)
+
+// LabelsToSignature returns a quasi-unique signature (i.e., fingerprint) for a
+// given label set. (Collisions are possible but unlikely if the number of label
+// sets the function is applied to is small.)
+func LabelsToSignature(labels map[string]string) uint64 {
+	if len(labels) == 0 {
+		return emptyLabelSignature
+	}
+
+	labelNames := make([]string, 0, len(labels))
+	for labelName := range labels {
+		labelNames = append(labelNames, labelName)
+	}
+	sort.Strings(labelNames)
+
+	sum := hashNew()
+	for _, labelName := range labelNames {
+		sum = hashAdd(sum, labelName)
+		sum = hashAddByte(sum, SeparatorByte)
+		sum = hashAdd(sum, labels[labelName])
+		sum = hashAddByte(sum, SeparatorByte)
+	}
+	return sum
+}
+
+// labelSetToFingerprint works exactly as LabelsToSignature but takes a LabelSet as
+// parameter (rather than a label map) and returns a Fingerprint.
+func labelSetToFingerprint(ls LabelSet) Fingerprint {
+	if len(ls) == 0 {
+		return Fingerprint(emptyLabelSignature)
+	}
+
+	labelNames := make(LabelNames, 0, len(ls))
+	for labelName := range ls {
+		labelNames = append(labelNames, labelName)
+	}
+	sort.Sort(labelNames)
+
+	sum := hashNew()
+	for _, labelName := range labelNames {
+		sum = hashAdd(sum, string(labelName))
+		sum = hashAddByte(sum, SeparatorByte)
+		sum = hashAdd(sum, string(ls[labelName]))
+		sum = hashAddByte(sum, SeparatorByte)
+	}
+	return Fingerprint(sum)
+}
+
+// labelSetToFastFingerprint works similar to labelSetToFingerprint but uses a
+// faster and less allocation-heavy hash function, which is more susceptible to
+// create hash collisions. Therefore, collision detection should be applied.
+func labelSetToFastFingerprint(ls LabelSet) Fingerprint {
+	if len(ls) == 0 {
+		return Fingerprint(emptyLabelSignature)
+	}
+
+	var result uint64
+	for labelName, labelValue := range ls {
+		sum := hashNew()
+		sum = hashAdd(sum, string(labelName))
+		sum = hashAddByte(sum, SeparatorByte)
+		sum = hashAdd(sum, string(labelValue))
+		result ^= sum
+	}
+	return Fingerprint(result)
+}
+
+// SignatureForLabels works like LabelsToSignature but takes a Metric as
+// parameter (rather than a label map) and only includes the labels with the
+// specified LabelNames into the signature calculation. The labels passed in
+// will be sorted by this function.
+func SignatureForLabels(m Metric, labels ...LabelName) uint64 {
+	if len(labels) == 0 {
+		return emptyLabelSignature
+	}
+
+	sort.Sort(LabelNames(labels))
+
+	sum := hashNew()
+	for _, label := range labels {
+		sum = hashAdd(sum, string(label))
+		sum = hashAddByte(sum, SeparatorByte)
+		sum = hashAdd(sum, string(m[label]))
+		sum = hashAddByte(sum, SeparatorByte)
+	}
+	return sum
+}
+
+// SignatureWithoutLabels works like LabelsToSignature but takes a Metric as
+// parameter (rather than a label map) and excludes the labels with any of the
+// specified LabelNames from the signature calculation.
+func SignatureWithoutLabels(m Metric, labels map[LabelName]struct{}) uint64 {
+	if len(m) == 0 {
+		return emptyLabelSignature
+	}
+
+	labelNames := make(LabelNames, 0, len(m))
+	for labelName := range m {
+		if _, exclude := labels[labelName]; !exclude {
+			labelNames = append(labelNames, labelName)
+		}
+	}
+	if len(labelNames) == 0 {
+		return emptyLabelSignature
+	}
+	sort.Sort(labelNames)
+
+	sum := hashNew()
+	for _, labelName := range labelNames {
+		sum = hashAdd(sum, string(labelName))
+		sum = hashAddByte(sum, SeparatorByte)
+		sum = hashAdd(sum, string(m[labelName]))
+		sum = hashAddByte(sum, SeparatorByte)
+	}
+	return sum
+}
diff --git a/vendor/github.com/prometheus/common/model/silence.go b/vendor/github.com/prometheus/common/model/silence.go
new file mode 100644
index 000000000..bb99889d2
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/silence.go
@@ -0,0 +1,106 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"time"
+)
+
+// Matcher describes a matches the value of a given label.
+type Matcher struct {
+	Name    LabelName `json:"name"`
+	Value   string    `json:"value"`
+	IsRegex bool      `json:"isRegex"`
+}
+
+func (m *Matcher) UnmarshalJSON(b []byte) error {
+	type plain Matcher
+	if err := json.Unmarshal(b, (*plain)(m)); err != nil {
+		return err
+	}
+
+	if len(m.Name) == 0 {
+		return fmt.Errorf("label name in matcher must not be empty")
+	}
+	if m.IsRegex {
+		if _, err := regexp.Compile(m.Value); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Validate returns true iff all fields of the matcher have valid values.
+func (m *Matcher) Validate() error {
+	if !m.Name.IsValid() {
+		return fmt.Errorf("invalid name %q", m.Name)
+	}
+	if m.IsRegex {
+		if _, err := regexp.Compile(m.Value); err != nil {
+			return fmt.Errorf("invalid regular expression %q", m.Value)
+		}
+	} else if !LabelValue(m.Value).IsValid() || len(m.Value) == 0 {
+		return fmt.Errorf("invalid value %q", m.Value)
+	}
+	return nil
+}
+
+// Silence defines the representation of a silence definition in the Prometheus
+// eco-system.
+type Silence struct {
+	ID uint64 `json:"id,omitempty"`
+
+	Matchers []*Matcher `json:"matchers"`
+
+	StartsAt time.Time `json:"startsAt"`
+	EndsAt   time.Time `json:"endsAt"`
+
+	CreatedAt time.Time `json:"createdAt,omitempty"`
+	CreatedBy string    `json:"createdBy"`
+	Comment   string    `json:"comment,omitempty"`
+}
+
+// Validate returns true iff all fields of the silence have valid values.
+func (s *Silence) Validate() error {
+	if len(s.Matchers) == 0 {
+		return fmt.Errorf("at least one matcher required")
+	}
+	for _, m := range s.Matchers {
+		if err := m.Validate(); err != nil {
+			return fmt.Errorf("invalid matcher: %s", err)
+		}
+	}
+	if s.StartsAt.IsZero() {
+		return fmt.Errorf("start time missing")
+	}
+	if s.EndsAt.IsZero() {
+		return fmt.Errorf("end time missing")
+	}
+	if s.EndsAt.Before(s.StartsAt) {
+		return fmt.Errorf("start time must be before end time")
+	}
+	if s.CreatedBy == "" {
+		return fmt.Errorf("creator information missing")
+	}
+	if s.Comment == "" {
+		return fmt.Errorf("comment missing")
+	}
+	if s.CreatedAt.IsZero() {
+		return fmt.Errorf("creation timestamp missing")
+	}
+	return nil
+}
diff --git a/vendor/github.com/prometheus/common/model/time.go b/vendor/github.com/prometheus/common/model/time.go
new file mode 100644
index 000000000..7b0064fdb
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/time.go
@@ -0,0 +1,270 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"fmt"
+	"math"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	// MinimumTick is the minimum supported time resolution. This has to be
+	// at least time.Second in order for the code below to work.
+	minimumTick = time.Millisecond
+	// second is the Time duration equivalent to one second.
+	second = int64(time.Second / minimumTick)
+	// The number of nanoseconds per minimum tick.
+	nanosPerTick = int64(minimumTick / time.Nanosecond)
+
+	// Earliest is the earliest Time representable. Handy for
+	// initializing a high watermark.
+	Earliest = Time(math.MinInt64)
+	// Latest is the latest Time representable. Handy for initializing
+	// a low watermark.
+	Latest = Time(math.MaxInt64)
+)
+
+// Time is the number of milliseconds since the epoch
+// (1970-01-01 00:00 UTC) excluding leap seconds.
+type Time int64
+
+// Interval describes an interval between two timestamps.
+type Interval struct {
+	Start, End Time
+}
+
+// Now returns the current time as a Time.
+func Now() Time {
+	return TimeFromUnixNano(time.Now().UnixNano())
+}
+
+// TimeFromUnix returns the Time equivalent to the Unix Time t
+// provided in seconds.
+func TimeFromUnix(t int64) Time {
+	return Time(t * second)
+}
+
+// TimeFromUnixNano returns the Time equivalent to the Unix Time
+// t provided in nanoseconds.
+func TimeFromUnixNano(t int64) Time {
+	return Time(t / nanosPerTick)
+}
+
+// Equal reports whether two Times represent the same instant.
+func (t Time) Equal(o Time) bool {
+	return t == o
+}
+
+// Before reports whether the Time t is before o.
+func (t Time) Before(o Time) bool {
+	return t < o
+}
+
+// After reports whether the Time t is after o.
+func (t Time) After(o Time) bool {
+	return t > o
+}
+
+// Add returns the Time t + d.
+func (t Time) Add(d time.Duration) Time {
+	return t + Time(d/minimumTick)
+}
+
+// Sub returns the Duration t - o.
+func (t Time) Sub(o Time) time.Duration {
+	return time.Duration(t-o) * minimumTick
+}
+
+// Time returns the time.Time representation of t.
+func (t Time) Time() time.Time {
+	return time.Unix(int64(t)/second, (int64(t)%second)*nanosPerTick)
+}
+
+// Unix returns t as a Unix time, the number of seconds elapsed
+// since January 1, 1970 UTC.
+func (t Time) Unix() int64 {
+	return int64(t) / second
+}
+
+// UnixNano returns t as a Unix time, the number of nanoseconds elapsed
+// since January 1, 1970 UTC.
+func (t Time) UnixNano() int64 {
+	return int64(t) * nanosPerTick
+}
+
+// The number of digits after the dot.
+var dotPrecision = int(math.Log10(float64(second)))
+
+// String returns a string representation of the Time.
+func (t Time) String() string {
+	return strconv.FormatFloat(float64(t)/float64(second), 'f', -1, 64)
+}
+
+// MarshalJSON implements the json.Marshaler interface.
+func (t Time) MarshalJSON() ([]byte, error) {
+	return []byte(t.String()), nil
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (t *Time) UnmarshalJSON(b []byte) error {
+	p := strings.Split(string(b), ".")
+	switch len(p) {
+	case 1:
+		v, err := strconv.ParseInt(string(p[0]), 10, 64)
+		if err != nil {
+			return err
+		}
+		*t = Time(v * second)
+
+	case 2:
+		v, err := strconv.ParseInt(string(p[0]), 10, 64)
+		if err != nil {
+			return err
+		}
+		v *= second
+
+		prec := dotPrecision - len(p[1])
+		if prec < 0 {
+			p[1] = p[1][:dotPrecision]
+		} else if prec > 0 {
+			p[1] = p[1] + strings.Repeat("0", prec)
+		}
+
+		va, err := strconv.ParseInt(p[1], 10, 32)
+		if err != nil {
+			return err
+		}
+
+		// If the value was something like -0.1 the negative is lost in the
+		// parsing because of the leading zero, this ensures that we capture it.
+		if len(p[0]) > 0 && p[0][0] == '-' && v+va > 0 {
+			*t = Time(v+va) * -1
+		} else {
+			*t = Time(v + va)
+		}
+
+	default:
+		return fmt.Errorf("invalid time %q", string(b))
+	}
+	return nil
+}
+
+// Duration wraps time.Duration. It is used to parse the custom duration format
+// from YAML.
+// This type should not propagate beyond the scope of input/output processing.
+type Duration time.Duration
+
+// Set implements pflag/flag.Value
+func (d *Duration) Set(s string) error {
+	var err error
+	*d, err = ParseDuration(s)
+	return err
+}
+
+// Type implements pflag.Value
+func (d *Duration) Type() string {
+	return "duration"
+}
+
+var durationRE = regexp.MustCompile("^([0-9]+)(y|w|d|h|m|s|ms)$")
+
+// ParseDuration parses a string into a time.Duration, assuming that a year
+// always has 365d, a week always has 7d, and a day always has 24h.
+func ParseDuration(durationStr string) (Duration, error) {
+	matches := durationRE.FindStringSubmatch(durationStr)
+	if len(matches) != 3 {
+		return 0, fmt.Errorf("not a valid duration string: %q", durationStr)
+	}
+	var (
+		n, _ = strconv.Atoi(matches[1])
+		dur  = time.Duration(n) * time.Millisecond
+	)
+	switch unit := matches[2]; unit {
+	case "y":
+		dur *= 1000 * 60 * 60 * 24 * 365
+	case "w":
+		dur *= 1000 * 60 * 60 * 24 * 7
+	case "d":
+		dur *= 1000 * 60 * 60 * 24
+	case "h":
+		dur *= 1000 * 60 * 60
+	case "m":
+		dur *= 1000 * 60
+	case "s":
+		dur *= 1000
+	case "ms":
+		// Value already correct
+	default:
+		return 0, fmt.Errorf("invalid time unit in duration string: %q", unit)
+	}
+	return Duration(dur), nil
+}
+
+func (d Duration) String() string {
+	var (
+		ms   = int64(time.Duration(d) / time.Millisecond)
+		unit = "ms"
+	)
+	if ms == 0 {
+		return "0s"
+	}
+	factors := map[string]int64{
+		"y":  1000 * 60 * 60 * 24 * 365,
+		"w":  1000 * 60 * 60 * 24 * 7,
+		"d":  1000 * 60 * 60 * 24,
+		"h":  1000 * 60 * 60,
+		"m":  1000 * 60,
+		"s":  1000,
+		"ms": 1,
+	}
+
+	switch int64(0) {
+	case ms % factors["y"]:
+		unit = "y"
+	case ms % factors["w"]:
+		unit = "w"
+	case ms % factors["d"]:
+		unit = "d"
+	case ms % factors["h"]:
+		unit = "h"
+	case ms % factors["m"]:
+		unit = "m"
+	case ms % factors["s"]:
+		unit = "s"
+	}
+	return fmt.Sprintf("%v%v", ms/factors[unit], unit)
+}
+
+// MarshalYAML implements the yaml.Marshaler interface.
+func (d Duration) MarshalYAML() (interface{}, error) {
+	return d.String(), nil
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaler interface.
+func (d *Duration) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var s string
+	if err := unmarshal(&s); err != nil {
+		return err
+	}
+	dur, err := ParseDuration(s)
+	if err != nil {
+		return err
+	}
+	*d = dur
+	return nil
+}
diff --git a/vendor/github.com/prometheus/common/model/value.go b/vendor/github.com/prometheus/common/model/value.go
new file mode 100644
index 000000000..c9d8fb1a2
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/value.go
@@ -0,0 +1,416 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"math"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+var (
+	// ZeroSamplePair is the pseudo zero-value of SamplePair used to signal a
+	// non-existing sample pair. It is a SamplePair with timestamp Earliest and
+	// value 0.0. Note that the natural zero value of SamplePair has a timestamp
+	// of 0, which is possible to appear in a real SamplePair and thus not
+	// suitable to signal a non-existing SamplePair.
+	ZeroSamplePair = SamplePair{Timestamp: Earliest}
+
+	// ZeroSample is the pseudo zero-value of Sample used to signal a
+	// non-existing sample. It is a Sample with timestamp Earliest, value 0.0,
+	// and metric nil. Note that the natural zero value of Sample has a timestamp
+	// of 0, which is possible to appear in a real Sample and thus not suitable
+	// to signal a non-existing Sample.
+	ZeroSample = Sample{Timestamp: Earliest}
+)
+
+// A SampleValue is a representation of a value for a given sample at a given
+// time.
+type SampleValue float64
+
+// MarshalJSON implements json.Marshaler.
+func (v SampleValue) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (v *SampleValue) UnmarshalJSON(b []byte) error {
+	if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' {
+		return fmt.Errorf("sample value must be a quoted string")
+	}
+	f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64)
+	if err != nil {
+		return err
+	}
+	*v = SampleValue(f)
+	return nil
+}
+
+// Equal returns true if the value of v and o is equal or if both are NaN. Note
+// that v==o is false if both are NaN. If you want the conventional float
+// behavior, use == to compare two SampleValues.
+func (v SampleValue) Equal(o SampleValue) bool {
+	if v == o {
+		return true
+	}
+	return math.IsNaN(float64(v)) && math.IsNaN(float64(o))
+}
+
+func (v SampleValue) String() string {
+	return strconv.FormatFloat(float64(v), 'f', -1, 64)
+}
+
+// SamplePair pairs a SampleValue with a Timestamp.
+type SamplePair struct {
+	Timestamp Time
+	Value     SampleValue
+}
+
+// MarshalJSON implements json.Marshaler.
+func (s SamplePair) MarshalJSON() ([]byte, error) {
+	t, err := json.Marshal(s.Timestamp)
+	if err != nil {
+		return nil, err
+	}
+	v, err := json.Marshal(s.Value)
+	if err != nil {
+		return nil, err
+	}
+	return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *SamplePair) UnmarshalJSON(b []byte) error {
+	v := [...]json.Unmarshaler{&s.Timestamp, &s.Value}
+	return json.Unmarshal(b, &v)
+}
+
+// Equal returns true if this SamplePair and o have equal Values and equal
+// Timestamps. The semantics of Value equality is defined by SampleValue.Equal.
+func (s *SamplePair) Equal(o *SamplePair) bool {
+	return s == o || (s.Value.Equal(o.Value) && s.Timestamp.Equal(o.Timestamp))
+}
+
+func (s SamplePair) String() string {
+	return fmt.Sprintf("%s @[%s]", s.Value, s.Timestamp)
+}
+
+// Sample is a sample pair associated with a metric.
+type Sample struct {
+	Metric    Metric      `json:"metric"`
+	Value     SampleValue `json:"value"`
+	Timestamp Time        `json:"timestamp"`
+}
+
+// Equal compares first the metrics, then the timestamp, then the value. The
+// semantics of value equality is defined by SampleValue.Equal.
+func (s *Sample) Equal(o *Sample) bool {
+	if s == o {
+		return true
+	}
+
+	if !s.Metric.Equal(o.Metric) {
+		return false
+	}
+	if !s.Timestamp.Equal(o.Timestamp) {
+		return false
+	}
+
+	return s.Value.Equal(o.Value)
+}
+
+func (s Sample) String() string {
+	return fmt.Sprintf("%s => %s", s.Metric, SamplePair{
+		Timestamp: s.Timestamp,
+		Value:     s.Value,
+	})
+}
+
+// MarshalJSON implements json.Marshaler.
+func (s Sample) MarshalJSON() ([]byte, error) {
+	v := struct {
+		Metric Metric     `json:"metric"`
+		Value  SamplePair `json:"value"`
+	}{
+		Metric: s.Metric,
+		Value: SamplePair{
+			Timestamp: s.Timestamp,
+			Value:     s.Value,
+		},
+	}
+
+	return json.Marshal(&v)
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *Sample) UnmarshalJSON(b []byte) error {
+	v := struct {
+		Metric Metric     `json:"metric"`
+		Value  SamplePair `json:"value"`
+	}{
+		Metric: s.Metric,
+		Value: SamplePair{
+			Timestamp: s.Timestamp,
+			Value:     s.Value,
+		},
+	}
+
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+
+	s.Metric = v.Metric
+	s.Timestamp = v.Value.Timestamp
+	s.Value = v.Value.Value
+
+	return nil
+}
+
+// Samples is a sortable Sample slice. It implements sort.Interface.
+type Samples []*Sample
+
+func (s Samples) Len() int {
+	return len(s)
+}
+
+// Less compares first the metrics, then the timestamp.
+func (s Samples) Less(i, j int) bool {
+	switch {
+	case s[i].Metric.Before(s[j].Metric):
+		return true
+	case s[j].Metric.Before(s[i].Metric):
+		return false
+	case s[i].Timestamp.Before(s[j].Timestamp):
+		return true
+	default:
+		return false
+	}
+}
+
+func (s Samples) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}
+
+// Equal compares two sets of samples and returns true if they are equal.
+func (s Samples) Equal(o Samples) bool {
+	if len(s) != len(o) {
+		return false
+	}
+
+	for i, sample := range s {
+		if !sample.Equal(o[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// SampleStream is a stream of Values belonging to an attached COWMetric.
+type SampleStream struct {
+	Metric Metric       `json:"metric"`
+	Values []SamplePair `json:"values"`
+}
+
+func (ss SampleStream) String() string {
+	vals := make([]string, len(ss.Values))
+	for i, v := range ss.Values {
+		vals[i] = v.String()
+	}
+	return fmt.Sprintf("%s =>\n%s", ss.Metric, strings.Join(vals, "\n"))
+}
+
+// Value is a generic interface for values resulting from a query evaluation.
+type Value interface {
+	Type() ValueType
+	String() string
+}
+
+func (Matrix) Type() ValueType  { return ValMatrix }
+func (Vector) Type() ValueType  { return ValVector }
+func (*Scalar) Type() ValueType { return ValScalar }
+func (*String) Type() ValueType { return ValString }
+
+type ValueType int
+
+const (
+	ValNone ValueType = iota
+	ValScalar
+	ValVector
+	ValMatrix
+	ValString
+)
+
+// MarshalJSON implements json.Marshaler.
+func (et ValueType) MarshalJSON() ([]byte, error) {
+	return json.Marshal(et.String())
+}
+
+func (et *ValueType) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	switch s {
+	case "<ValNone>":
+		*et = ValNone
+	case "scalar":
+		*et = ValScalar
+	case "vector":
+		*et = ValVector
+	case "matrix":
+		*et = ValMatrix
+	case "string":
+		*et = ValString
+	default:
+		return fmt.Errorf("unknown value type %q", s)
+	}
+	return nil
+}
+
+func (e ValueType) String() string {
+	switch e {
+	case ValNone:
+		return "<ValNone>"
+	case ValScalar:
+		return "scalar"
+	case ValVector:
+		return "vector"
+	case ValMatrix:
+		return "matrix"
+	case ValString:
+		return "string"
+	}
+	panic("ValueType.String: unhandled value type")
+}
+
+// Scalar is a scalar value evaluated at the set timestamp.
+type Scalar struct {
+	Value     SampleValue `json:"value"`
+	Timestamp Time        `json:"timestamp"`
+}
+
+func (s Scalar) String() string {
+	return fmt.Sprintf("scalar: %v @[%v]", s.Value, s.Timestamp)
+}
+
+// MarshalJSON implements json.Marshaler.
+func (s Scalar) MarshalJSON() ([]byte, error) {
+	v := strconv.FormatFloat(float64(s.Value), 'f', -1, 64)
+	return json.Marshal([...]interface{}{s.Timestamp, string(v)})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *Scalar) UnmarshalJSON(b []byte) error {
+	var f string
+	v := [...]interface{}{&s.Timestamp, &f}
+
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+
+	value, err := strconv.ParseFloat(f, 64)
+	if err != nil {
+		return fmt.Errorf("error parsing sample value: %s", err)
+	}
+	s.Value = SampleValue(value)
+	return nil
+}
+
+// String is a string value evaluated at the set timestamp.
+type String struct {
+	Value     string `json:"value"`
+	Timestamp Time   `json:"timestamp"`
+}
+
+func (s *String) String() string {
+	return s.Value
+}
+
+// MarshalJSON implements json.Marshaler.
+func (s String) MarshalJSON() ([]byte, error) {
+	return json.Marshal([]interface{}{s.Timestamp, s.Value})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *String) UnmarshalJSON(b []byte) error {
+	v := [...]interface{}{&s.Timestamp, &s.Value}
+	return json.Unmarshal(b, &v)
+}
+
+// Vector is basically only an alias for Samples, but the
+// contract is that in a Vector, all Samples have the same timestamp.
+type Vector []*Sample
+
+func (vec Vector) String() string {
+	entries := make([]string, len(vec))
+	for i, s := range vec {
+		entries[i] = s.String()
+	}
+	return strings.Join(entries, "\n")
+}
+
+func (vec Vector) Len() int      { return len(vec) }
+func (vec Vector) Swap(i, j int) { vec[i], vec[j] = vec[j], vec[i] }
+
+// Less compares first the metrics, then the timestamp.
+func (vec Vector) Less(i, j int) bool {
+	switch {
+	case vec[i].Metric.Before(vec[j].Metric):
+		return true
+	case vec[j].Metric.Before(vec[i].Metric):
+		return false
+	case vec[i].Timestamp.Before(vec[j].Timestamp):
+		return true
+	default:
+		return false
+	}
+}
+
+// Equal compares two sets of samples and returns true if they are equal.
+func (vec Vector) Equal(o Vector) bool {
+	if len(vec) != len(o) {
+		return false
+	}
+
+	for i, sample := range vec {
+		if !sample.Equal(o[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// Matrix is a list of time series.
+type Matrix []*SampleStream
+
+func (m Matrix) Len() int           { return len(m) }
+func (m Matrix) Less(i, j int) bool { return m[i].Metric.Before(m[j].Metric) }
+func (m Matrix) Swap(i, j int)      { m[i], m[j] = m[j], m[i] }
+
+func (mat Matrix) String() string {
+	matCp := make(Matrix, len(mat))
+	copy(matCp, mat)
+	sort.Sort(matCp)
+
+	strs := make([]string, len(matCp))
+
+	for i, ss := range matCp {
+		strs[i] = ss.String()
+	}
+
+	return strings.Join(strs, "\n")
+}
diff --git a/vendor/github.com/prometheus/procfs/.gitignore b/vendor/github.com/prometheus/procfs/.gitignore
new file mode 100644
index 000000000..25e3659ab
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/.gitignore
@@ -0,0 +1 @@
+/fixtures/
diff --git a/vendor/github.com/prometheus/procfs/.golangci.yml b/vendor/github.com/prometheus/procfs/.golangci.yml
new file mode 100644
index 000000000..438ca92ec
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/.golangci.yml
@@ -0,0 +1,6 @@
+# Run only staticcheck for now. Additional linters will be enabled one-by-one.
+linters:
+  enable:
+  - staticcheck
+  - govet
+  disable-all: true
diff --git a/vendor/github.com/prometheus/procfs/CONTRIBUTING.md b/vendor/github.com/prometheus/procfs/CONTRIBUTING.md
new file mode 100644
index 000000000..40503edbf
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/CONTRIBUTING.md
@@ -0,0 +1,18 @@
+# Contributing
+
+Prometheus uses GitHub to manage reviews of pull requests.
+
+* If you have a trivial fix or improvement, go ahead and create a pull request,
+  addressing (with `@...`) the maintainer of this repository (see
+  [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request.
+
+* If you plan to do something more involved, first discuss your ideas
+  on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers).
+  This will avoid unnecessary work and surely give you and us a good deal
+  of inspiration.
+
+* Relevant coding style guidelines are the [Go Code Review
+  Comments](https://code.google.com/p/go-wiki/wiki/CodeReviewComments)
+  and the _Formatting and style_ section of Peter Bourgon's [Go: Best
+  Practices for Production
+  Environments](http://peter.bourgon.org/go-in-production/#formatting-and-style).
diff --git a/vendor/github.com/prometheus/procfs/LICENSE b/vendor/github.com/prometheus/procfs/LICENSE
new file mode 100644
index 000000000..261eeb9e9
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/vendor/github.com/prometheus/procfs/MAINTAINERS.md b/vendor/github.com/prometheus/procfs/MAINTAINERS.md
new file mode 100644
index 000000000..56ba67d3e
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/MAINTAINERS.md
@@ -0,0 +1,2 @@
+* Johannes 'fish' Ziemke <github@freigeist.org> @discordianfish
+* Paul Gier <pgier@redhat.com> @pgier
diff --git a/vendor/github.com/prometheus/procfs/Makefile b/vendor/github.com/prometheus/procfs/Makefile
new file mode 100644
index 000000000..616a0d25e
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/Makefile
@@ -0,0 +1,29 @@
+# Copyright 2018 The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include Makefile.common
+
+%/.unpacked: %.ttar
+	@echo ">> extracting fixtures"
+	./ttar -C $(dir $*) -x -f $*.ttar
+	touch $@
+
+update_fixtures:
+	rm -vf fixtures/.unpacked
+	./ttar -c -f fixtures.ttar fixtures/
+
+.PHONY: build
+build:
+
+.PHONY: test
+test: fixtures/.unpacked common-test
diff --git a/vendor/github.com/prometheus/procfs/Makefile.common b/vendor/github.com/prometheus/procfs/Makefile.common
new file mode 100644
index 000000000..c7f9ea64f
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/Makefile.common
@@ -0,0 +1,272 @@
+# Copyright 2018 The Prometheus Authors
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# A common Makefile that includes rules to be reused in different prometheus projects.
+# !!! Open PRs only against the prometheus/prometheus/Makefile.common repository!
+
+# Example usage :
+# Create the main Makefile in the root project directory.
+# include Makefile.common
+# customTarget:
+# 	@echo ">> Running customTarget"
+#
+
+# Ensure GOBIN is not set during build so that promu is installed to the correct path
+unexport GOBIN
+
+GO           ?= go
+GOFMT        ?= $(GO)fmt
+FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
+GOOPTS       ?=
+GOHOSTOS     ?= $(shell $(GO) env GOHOSTOS)
+GOHOSTARCH   ?= $(shell $(GO) env GOHOSTARCH)
+
+GO_VERSION        ?= $(shell $(GO) version)
+GO_VERSION_NUMBER ?= $(word 3, $(GO_VERSION))
+PRE_GO_111        ?= $(shell echo $(GO_VERSION_NUMBER) | grep -E 'go1\.(10|[0-9])\.')
+
+GOVENDOR :=
+GO111MODULE :=
+ifeq (, $(PRE_GO_111))
+	ifneq (,$(wildcard go.mod))
+		# Enforce Go modules support just in case the directory is inside GOPATH (and for Travis CI).
+		GO111MODULE := on
+
+		ifneq (,$(wildcard vendor))
+			# Always use the local vendor/ directory to satisfy the dependencies.
+			GOOPTS := $(GOOPTS) -mod=vendor
+		endif
+	endif
+else
+	ifneq (,$(wildcard go.mod))
+		ifneq (,$(wildcard vendor))
+$(warning This repository requires Go >= 1.11 because of Go modules)
+$(warning Some recipes may not work as expected as the current Go runtime is '$(GO_VERSION_NUMBER)')
+		endif
+	else
+		# This repository isn't using Go modules (yet).
+		GOVENDOR := $(FIRST_GOPATH)/bin/govendor
+	endif
+endif
+PROMU        := $(FIRST_GOPATH)/bin/promu
+pkgs          = ./...
+
+ifeq (arm, $(GOHOSTARCH))
+	GOHOSTARM ?= $(shell GOARM= $(GO) env GOARM)
+	GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)v$(GOHOSTARM)
+else
+	GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)
+endif
+
+PROMU_VERSION ?= 0.4.0
+PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
+
+GOLANGCI_LINT :=
+GOLANGCI_LINT_OPTS ?=
+GOLANGCI_LINT_VERSION ?= v1.16.0
+# golangci-lint only supports linux, darwin and windows platforms on i386/amd64.
+# windows isn't included here because of the path separator being different.
+ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))
+	ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386))
+		GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
+	endif
+endif
+
+PREFIX                  ?= $(shell pwd)
+BIN_DIR                 ?= $(shell pwd)
+DOCKER_IMAGE_TAG        ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD))
+DOCKER_REPO             ?= prom
+
+DOCKER_ARCHS            ?= amd64
+
+BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS))
+PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS))
+TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS))
+
+ifeq ($(GOHOSTARCH),amd64)
+        ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows))
+                # Only supported on amd64
+                test-flags := -race
+        endif
+endif
+
+# This rule is used to forward a target like "build" to "common-build".  This
+# allows a new "build" target to be defined in a Makefile which includes this
+# one and override "common-build" without override warnings.
+%: common-% ;
+
+.PHONY: common-all
+common-all: precheck style check_license lint unused build test
+
+.PHONY: common-style
+common-style:
+	@echo ">> checking code style"
+	@fmtRes=$$($(GOFMT) -d $$(find . -path ./vendor -prune -o -name '*.go' -print)); \
+	if [ -n "$${fmtRes}" ]; then \
+		echo "gofmt checking failed!"; echo "$${fmtRes}"; echo; \
+		echo "Please ensure you are using $$($(GO) version) for formatting code."; \
+		exit 1; \
+	fi
+
+.PHONY: common-check_license
+common-check_license:
+	@echo ">> checking license header"
+	@licRes=$$(for file in $$(find . -type f -iname '*.go' ! -path './vendor/*') ; do \
+               awk 'NR<=3' $$file | grep -Eq "(Copyright|generated|GENERATED)" || echo $$file; \
+       done); \
+       if [ -n "$${licRes}" ]; then \
+               echo "license header checking failed:"; echo "$${licRes}"; \
+               exit 1; \
+       fi
+
+.PHONY: common-deps
+common-deps:
+	@echo ">> getting dependencies"
+ifdef GO111MODULE
+	GO111MODULE=$(GO111MODULE) $(GO) mod download
+else
+	$(GO) get $(GOOPTS) -t ./...
+endif
+
+.PHONY: common-test-short
+common-test-short:
+	@echo ">> running short tests"
+	GO111MODULE=$(GO111MODULE) $(GO) test -short $(GOOPTS) $(pkgs)
+
+.PHONY: common-test
+common-test:
+	@echo ">> running all tests"
+	GO111MODULE=$(GO111MODULE) $(GO) test $(test-flags) $(GOOPTS) $(pkgs)
+
+.PHONY: common-format
+common-format:
+	@echo ">> formatting code"
+	GO111MODULE=$(GO111MODULE) $(GO) fmt $(pkgs)
+
+.PHONY: common-vet
+common-vet:
+	@echo ">> vetting code"
+	GO111MODULE=$(GO111MODULE) $(GO) vet $(GOOPTS) $(pkgs)
+
+.PHONY: common-lint
+common-lint: $(GOLANGCI_LINT)
+ifdef GOLANGCI_LINT
+	@echo ">> running golangci-lint"
+ifdef GO111MODULE
+# 'go list' needs to be executed before staticcheck to prepopulate the modules cache.
+# Otherwise staticcheck might fail randomly for some reason not yet explained.
+	GO111MODULE=$(GO111MODULE) $(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null
+	GO111MODULE=$(GO111MODULE) $(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs)
+else
+	$(GOLANGCI_LINT) run $(pkgs)
+endif
+endif
+
+# For backward-compatibility.
+.PHONY: common-staticcheck
+common-staticcheck: lint
+
+.PHONY: common-unused
+common-unused: $(GOVENDOR)
+ifdef GOVENDOR
+	@echo ">> running check for unused packages"
+	@$(GOVENDOR) list +unused | grep . && exit 1 || echo 'No unused packages'
+else
+ifdef GO111MODULE
+	@echo ">> running check for unused/missing packages in go.mod"
+	GO111MODULE=$(GO111MODULE) $(GO) mod tidy
+ifeq (,$(wildcard vendor))
+	@git diff --exit-code -- go.sum go.mod
+else
+	@echo ">> running check for unused packages in vendor/"
+	GO111MODULE=$(GO111MODULE) $(GO) mod vendor
+	@git diff --exit-code -- go.sum go.mod vendor/
+endif
+endif
+endif
+
+.PHONY: common-build
+common-build: promu
+	@echo ">> building binaries"
+	GO111MODULE=$(GO111MODULE) $(PROMU) build --prefix $(PREFIX)
+
+.PHONY: common-tarball
+common-tarball: promu
+	@echo ">> building release tarball"
+	$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)
+
+.PHONY: common-docker $(BUILD_DOCKER_ARCHS)
+common-docker: $(BUILD_DOCKER_ARCHS)
+$(BUILD_DOCKER_ARCHS): common-docker-%:
+	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \
+		--build-arg ARCH="$*" \
+		--build-arg OS="linux" \
+		.
+
+.PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS)
+common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
+$(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
+	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)"
+
+.PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS)
+common-docker-tag-latest: $(TAG_DOCKER_ARCHS)
+$(TAG_DOCKER_ARCHS): common-docker-tag-latest-%:
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
+
+.PHONY: common-docker-manifest
+common-docker-manifest:
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG))
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)"
+
+.PHONY: promu
+promu: $(PROMU)
+
+$(PROMU):
+	$(eval PROMU_TMP := $(shell mktemp -d))
+	curl -s -L $(PROMU_URL) | tar -xvzf - -C $(PROMU_TMP)
+	mkdir -p $(FIRST_GOPATH)/bin
+	cp $(PROMU_TMP)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM)/promu $(FIRST_GOPATH)/bin/promu
+	rm -r $(PROMU_TMP)
+
+.PHONY: proto
+proto:
+	@echo ">> generating code from proto files"
+	@./scripts/genproto.sh
+
+ifdef GOLANGCI_LINT
+$(GOLANGCI_LINT):
+	mkdir -p $(FIRST_GOPATH)/bin
+	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(FIRST_GOPATH)/bin $(GOLANGCI_LINT_VERSION)
+endif
+
+ifdef GOVENDOR
+.PHONY: $(GOVENDOR)
+$(GOVENDOR):
+	GOOS= GOARCH= $(GO) get -u github.com/kardianos/govendor
+endif
+
+.PHONY: precheck
+precheck::
+
+define PRECHECK_COMMAND_template =
+precheck:: $(1)_precheck
+
+PRECHECK_COMMAND_$(1) ?= $(1) $$(strip $$(PRECHECK_OPTIONS_$(1)))
+.PHONY: $(1)_precheck
+$(1)_precheck:
+	@if ! $$(PRECHECK_COMMAND_$(1)) 1>/dev/null 2>&1; then \
+		echo "Execution of '$$(PRECHECK_COMMAND_$(1))' command failed. Is $(1) installed?"; \
+		exit 1; \
+	fi
+endef
diff --git a/vendor/github.com/prometheus/procfs/NOTICE b/vendor/github.com/prometheus/procfs/NOTICE
new file mode 100644
index 000000000..53c5e9aa1
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/NOTICE
@@ -0,0 +1,7 @@
+procfs provides functions to retrieve system, kernel and process
+metrics from the pseudo-filesystem proc.
+
+Copyright 2014-2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
diff --git a/vendor/github.com/prometheus/procfs/README.md b/vendor/github.com/prometheus/procfs/README.md
new file mode 100644
index 000000000..6f8850feb
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/README.md
@@ -0,0 +1,53 @@
+# procfs
+
+This procfs package provides functions to retrieve system, kernel and process
+metrics from the pseudo-filesystems /proc and /sys.
+
+*WARNING*: This package is a work in progress. Its API may still break in
+backwards-incompatible ways without warnings. Use it at your own risk.
+
+[![GoDoc](https://godoc.org/github.com/prometheus/procfs?status.png)](https://godoc.org/github.com/prometheus/procfs)
+[![Build Status](https://travis-ci.org/prometheus/procfs.svg?branch=master)](https://travis-ci.org/prometheus/procfs)
+[![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/procfs)](https://goreportcard.com/report/github.com/prometheus/procfs)
+
+## Usage
+
+The procfs library is organized by packages based on whether the gathered data is coming from
+/proc, /sys, or both.  Each package contains an `FS` type which represents the path to either /proc, /sys, or both.  For example, current cpu statistics are gathered from
+`/proc/stat` and are available via the root procfs package.  First, the proc filesystem mount
+point is initialized, and then the stat information is read.
+
+```go
+fs, err := procfs.NewFS("/proc")
+stats, err := fs.Stat()
+```
+
+Some sub-packages such as `blockdevice`, require access to both the proc and sys filesystems.
+
+```go
+    fs, err := blockdevice.NewFS("/proc", "/sys")
+    stats, err := fs.ProcDiskstats()
+```
+
+## Building and Testing
+
+The procfs library is normally built as part of another application.  However, when making
+changes to the library, the `make test` command can be used to run the API test suite.
+
+### Updating Test Fixtures
+
+The procfs library includes a set of test fixtures which include many example files from
+the `/proc` and `/sys` filesystems.  These fixtures are included as a [ttar](https://github.com/ideaship/ttar) file
+which is extracted automatically during testing.  To add/update the test fixtures, first
+ensure the `fixtures` directory is up to date by removing the existing directory and then
+extracting the ttar file using `make fixtures/.unpacked` or just `make test`.
+
+```bash
+rm -rf fixtures
+make test
+```
+
+Next, make the required changes to the extracted files in the `fixtures` directory.  When
+the changes are complete, run `make update_fixtures` to create a new `fixtures.ttar` file
+based on the updated `fixtures` directory.  And finally, verify the changes using
+`git diff fixtures.ttar`.
diff --git a/vendor/github.com/prometheus/procfs/buddyinfo.go b/vendor/github.com/prometheus/procfs/buddyinfo.go
new file mode 100644
index 000000000..63d4229a4
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/buddyinfo.go
@@ -0,0 +1,85 @@
+// Copyright 2017 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// A BuddyInfo is the details parsed from /proc/buddyinfo.
+// The data is comprised of an array of free fragments of each size.
+// The sizes are 2^n*PAGE_SIZE, where n is the array index.
+type BuddyInfo struct {
+	Node  string
+	Zone  string
+	Sizes []float64
+}
+
+// NewBuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem.
+func (fs FS) BuddyInfo() ([]BuddyInfo, error) {
+	file, err := os.Open(fs.proc.Path("buddyinfo"))
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	return parseBuddyInfo(file)
+}
+
+func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
+	var (
+		buddyInfo   = []BuddyInfo{}
+		scanner     = bufio.NewScanner(r)
+		bucketCount = -1
+	)
+
+	for scanner.Scan() {
+		var err error
+		line := scanner.Text()
+		parts := strings.Fields(line)
+
+		if len(parts) < 4 {
+			return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo")
+		}
+
+		node := strings.TrimRight(parts[1], ",")
+		zone := strings.TrimRight(parts[3], ",")
+		arraySize := len(parts[4:])
+
+		if bucketCount == -1 {
+			bucketCount = arraySize
+		} else {
+			if bucketCount != arraySize {
+				return nil, fmt.Errorf("mismatch in number of buddyinfo buckets, previous count %d, new count %d", bucketCount, arraySize)
+			}
+		}
+
+		sizes := make([]float64, arraySize)
+		for i := 0; i < arraySize; i++ {
+			sizes[i], err = strconv.ParseFloat(parts[i+4], 64)
+			if err != nil {
+				return nil, fmt.Errorf("invalid value in buddyinfo: %s", err)
+			}
+		}
+
+		buddyInfo = append(buddyInfo, BuddyInfo{node, zone, sizes})
+	}
+
+	return buddyInfo, scanner.Err()
+}
diff --git a/vendor/github.com/prometheus/procfs/doc.go b/vendor/github.com/prometheus/procfs/doc.go
new file mode 100644
index 000000000..e2acd6d40
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/doc.go
@@ -0,0 +1,45 @@
+// Copyright 2014 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package procfs provides functions to retrieve system, kernel and process
+// metrics from the pseudo-filesystem proc.
+//
+// Example:
+//
+//    package main
+//
+//    import (
+//    	"fmt"
+//    	"log"
+//
+//    	"github.com/prometheus/procfs"
+//    )
+//
+//    func main() {
+//    	p, err := procfs.Self()
+//    	if err != nil {
+//    		log.Fatalf("could not get process: %s", err)
+//    	}
+//
+//    	stat, err := p.NewStat()
+//    	if err != nil {
+//    		log.Fatalf("could not get process stat: %s", err)
+//    	}
+//
+//    	fmt.Printf("command:  %s\n", stat.Comm)
+//    	fmt.Printf("cpu time: %fs\n", stat.CPUTime())
+//    	fmt.Printf("vsize:    %dB\n", stat.VirtualMemory())
+//    	fmt.Printf("rss:      %dB\n", stat.ResidentMemory())
+//    }
+//
+package procfs
diff --git a/vendor/github.com/prometheus/procfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/fixtures.ttar
new file mode 100644
index 000000000..951d909af
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/fixtures.ttar
@@ -0,0 +1,1808 @@
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+Directory: fixtures
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+Path: fixtures/proc/26231/cwd
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+Path: fixtures/proc/26231/exe
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+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/vendor/github.com/prometheus/procfs/fs.go b/vendor/github.com/prometheus/procfs/fs.go
new file mode 100644
index 000000000..0102ab0fd
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/fs.go
@@ -0,0 +1,43 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"github.com/prometheus/procfs/internal/fs"
+)
+
+// FS represents the pseudo-filesystem sys, which provides an interface to
+// kernel data structures.
+type FS struct {
+	proc fs.FS
+}
+
+// DefaultMountPoint is the common mount point of the proc filesystem.
+const DefaultMountPoint = fs.DefaultProcMountPoint
+
+// NewDefaultFS returns a new proc FS mounted under the default proc mountPoint.
+// It will error if the mount point directory can't be read or is a file.
+func NewDefaultFS() (FS, error) {
+	return NewFS(DefaultMountPoint)
+}
+
+// NewFS returns a new proc FS mounted under the given proc mountPoint. It will error
+// if the mount point directory can't be read or is a file.
+func NewFS(mountPoint string) (FS, error) {
+	fs, err := fs.NewFS(mountPoint)
+	if err != nil {
+		return FS{}, err
+	}
+	return FS{fs}, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/go.mod b/vendor/github.com/prometheus/procfs/go.mod
new file mode 100644
index 000000000..8a1b839fd
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/go.mod
@@ -0,0 +1,3 @@
+module github.com/prometheus/procfs
+
+require golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4
diff --git a/vendor/github.com/prometheus/procfs/go.sum b/vendor/github.com/prometheus/procfs/go.sum
new file mode 100644
index 000000000..7827dd3d5
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/go.sum
@@ -0,0 +1,2 @@
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
diff --git a/vendor/github.com/prometheus/procfs/internal/fs/fs.go b/vendor/github.com/prometheus/procfs/internal/fs/fs.go
new file mode 100644
index 000000000..c66a1cf80
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/internal/fs/fs.go
@@ -0,0 +1,52 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fs
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+const (
+	// DefaultProcMountPoint is the common mount point of the proc filesystem.
+	DefaultProcMountPoint = "/proc"
+
+	// DefaultSysMountPoint is the common mount point of the sys filesystem.
+	DefaultSysMountPoint = "/sys"
+)
+
+// FS represents a pseudo-filesystem, normally /proc or /sys, which provides an
+// interface to kernel data structures.
+type FS string
+
+// NewFS returns a new FS mounted under the given mountPoint. It will error
+// if the mount point can't be read.
+func NewFS(mountPoint string) (FS, error) {
+	info, err := os.Stat(mountPoint)
+	if err != nil {
+		return "", fmt.Errorf("could not read %s: %s", mountPoint, err)
+	}
+	if !info.IsDir() {
+		return "", fmt.Errorf("mount point %s is not a directory", mountPoint)
+	}
+
+	return FS(mountPoint), nil
+}
+
+// Path appends the given path elements to the filesystem path, adding separators
+// as necessary.
+func (fs FS) Path(p ...string) string {
+	return filepath.Join(append([]string{string(fs)}, p...)...)
+}
diff --git a/vendor/github.com/prometheus/procfs/ipvs.go b/vendor/github.com/prometheus/procfs/ipvs.go
new file mode 100644
index 000000000..2d6cb8d1c
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/ipvs.go
@@ -0,0 +1,239 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// IPVSStats holds IPVS statistics, as exposed by the kernel in `/proc/net/ip_vs_stats`.
+type IPVSStats struct {
+	// Total count of connections.
+	Connections uint64
+	// Total incoming packages processed.
+	IncomingPackets uint64
+	// Total outgoing packages processed.
+	OutgoingPackets uint64
+	// Total incoming traffic.
+	IncomingBytes uint64
+	// Total outgoing traffic.
+	OutgoingBytes uint64
+}
+
+// IPVSBackendStatus holds current metrics of one virtual / real address pair.
+type IPVSBackendStatus struct {
+	// The local (virtual) IP address.
+	LocalAddress net.IP
+	// The remote (real) IP address.
+	RemoteAddress net.IP
+	// The local (virtual) port.
+	LocalPort uint16
+	// The remote (real) port.
+	RemotePort uint16
+	// The local firewall mark
+	LocalMark string
+	// The transport protocol (TCP, UDP).
+	Proto string
+	// The current number of active connections for this virtual/real address pair.
+	ActiveConn uint64
+	// The current number of inactive connections for this virtual/real address pair.
+	InactConn uint64
+	// The current weight of this virtual/real address pair.
+	Weight uint64
+}
+
+// IPVSStats reads the IPVS statistics from the specified `proc` filesystem.
+func (fs FS) IPVSStats() (IPVSStats, error) {
+	file, err := os.Open(fs.proc.Path("net/ip_vs_stats"))
+	if err != nil {
+		return IPVSStats{}, err
+	}
+	defer file.Close()
+
+	return parseIPVSStats(file)
+}
+
+// parseIPVSStats performs the actual parsing of `ip_vs_stats`.
+func parseIPVSStats(file io.Reader) (IPVSStats, error) {
+	var (
+		statContent []byte
+		statLines   []string
+		statFields  []string
+		stats       IPVSStats
+	)
+
+	statContent, err := ioutil.ReadAll(file)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+
+	statLines = strings.SplitN(string(statContent), "\n", 4)
+	if len(statLines) != 4 {
+		return IPVSStats{}, errors.New("ip_vs_stats corrupt: too short")
+	}
+
+	statFields = strings.Fields(statLines[2])
+	if len(statFields) != 5 {
+		return IPVSStats{}, errors.New("ip_vs_stats corrupt: unexpected number of fields")
+	}
+
+	stats.Connections, err = strconv.ParseUint(statFields[0], 16, 64)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+	stats.IncomingPackets, err = strconv.ParseUint(statFields[1], 16, 64)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+	stats.OutgoingPackets, err = strconv.ParseUint(statFields[2], 16, 64)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+	stats.IncomingBytes, err = strconv.ParseUint(statFields[3], 16, 64)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+	stats.OutgoingBytes, err = strconv.ParseUint(statFields[4], 16, 64)
+	if err != nil {
+		return IPVSStats{}, err
+	}
+
+	return stats, nil
+}
+
+// IPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem.
+func (fs FS) IPVSBackendStatus() ([]IPVSBackendStatus, error) {
+	file, err := os.Open(fs.proc.Path("net/ip_vs"))
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	return parseIPVSBackendStatus(file)
+}
+
+func parseIPVSBackendStatus(file io.Reader) ([]IPVSBackendStatus, error) {
+	var (
+		status       []IPVSBackendStatus
+		scanner      = bufio.NewScanner(file)
+		proto        string
+		localMark    string
+		localAddress net.IP
+		localPort    uint16
+		err          error
+	)
+
+	for scanner.Scan() {
+		fields := strings.Fields(scanner.Text())
+		if len(fields) == 0 {
+			continue
+		}
+		switch {
+		case fields[0] == "IP" || fields[0] == "Prot" || fields[1] == "RemoteAddress:Port":
+			continue
+		case fields[0] == "TCP" || fields[0] == "UDP":
+			if len(fields) < 2 {
+				continue
+			}
+			proto = fields[0]
+			localMark = ""
+			localAddress, localPort, err = parseIPPort(fields[1])
+			if err != nil {
+				return nil, err
+			}
+		case fields[0] == "FWM":
+			if len(fields) < 2 {
+				continue
+			}
+			proto = fields[0]
+			localMark = fields[1]
+			localAddress = nil
+			localPort = 0
+		case fields[0] == "->":
+			if len(fields) < 6 {
+				continue
+			}
+			remoteAddress, remotePort, err := parseIPPort(fields[1])
+			if err != nil {
+				return nil, err
+			}
+			weight, err := strconv.ParseUint(fields[3], 10, 64)
+			if err != nil {
+				return nil, err
+			}
+			activeConn, err := strconv.ParseUint(fields[4], 10, 64)
+			if err != nil {
+				return nil, err
+			}
+			inactConn, err := strconv.ParseUint(fields[5], 10, 64)
+			if err != nil {
+				return nil, err
+			}
+			status = append(status, IPVSBackendStatus{
+				LocalAddress:  localAddress,
+				LocalPort:     localPort,
+				LocalMark:     localMark,
+				RemoteAddress: remoteAddress,
+				RemotePort:    remotePort,
+				Proto:         proto,
+				Weight:        weight,
+				ActiveConn:    activeConn,
+				InactConn:     inactConn,
+			})
+		}
+	}
+	return status, nil
+}
+
+func parseIPPort(s string) (net.IP, uint16, error) {
+	var (
+		ip  net.IP
+		err error
+	)
+
+	switch len(s) {
+	case 13:
+		ip, err = hex.DecodeString(s[0:8])
+		if err != nil {
+			return nil, 0, err
+		}
+	case 46:
+		ip = net.ParseIP(s[1:40])
+		if ip == nil {
+			return nil, 0, fmt.Errorf("invalid IPv6 address: %s", s[1:40])
+		}
+	default:
+		return nil, 0, fmt.Errorf("unexpected IP:Port: %s", s)
+	}
+
+	portString := s[len(s)-4:]
+	if len(portString) != 4 {
+		return nil, 0, fmt.Errorf("unexpected port string format: %s", portString)
+	}
+	port, err := strconv.ParseUint(portString, 16, 16)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	return ip, uint16(port), nil
+}
diff --git a/vendor/github.com/prometheus/procfs/mdstat.go b/vendor/github.com/prometheus/procfs/mdstat.go
new file mode 100644
index 000000000..71c106782
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/mdstat.go
@@ -0,0 +1,151 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var (
+	statuslineRE = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`)
+	buildlineRE  = regexp.MustCompile(`\((\d+)/\d+\)`)
+)
+
+// MDStat holds info parsed from /proc/mdstat.
+type MDStat struct {
+	// Name of the device.
+	Name string
+	// activity-state of the device.
+	ActivityState string
+	// Number of active disks.
+	DisksActive int64
+	// Total number of disks the device consists of.
+	DisksTotal int64
+	// Number of blocks the device holds.
+	BlocksTotal int64
+	// Number of blocks on the device that are in sync.
+	BlocksSynced int64
+}
+
+// MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of
+// structs containing the relevant info.  More information available here:
+// https://raid.wiki.kernel.org/index.php/Mdstat
+func (fs FS) MDStat() ([]MDStat, error) {
+	data, err := ioutil.ReadFile(fs.proc.Path("mdstat"))
+	if err != nil {
+		return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err)
+	}
+	mdstat, err := parseMDStat(data)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err)
+	}
+	return mdstat, nil
+}
+
+// parseMDStat parses data from mdstat file (/proc/mdstat) and returns a slice of
+// structs containing the relevant info.
+func parseMDStat(mdstatData []byte) ([]MDStat, error) {
+	mdStats := []MDStat{}
+	lines := strings.Split(string(mdstatData), "\n")
+	for i, l := range lines {
+		if strings.TrimSpace(l) == "" || l[0] == ' ' ||
+			strings.HasPrefix(l, "Personalities") || strings.HasPrefix(l, "unused") {
+			continue
+		}
+
+		deviceFields := strings.Fields(l)
+		if len(deviceFields) < 3 {
+			return nil, fmt.Errorf("not enough fields in mdline (expected at least 3): %s", l)
+		}
+		mdName := deviceFields[0]
+		activityState := deviceFields[2]
+
+		if len(lines) <= i+3 {
+			return mdStats, fmt.Errorf("missing lines for md device %s", mdName)
+		}
+
+		active, total, size, err := evalStatusLine(lines[i+1])
+		if err != nil {
+			return nil, err
+		}
+
+		syncLineIdx := i + 2
+		if strings.Contains(lines[i+2], "bitmap") { // skip bitmap line
+			syncLineIdx++
+		}
+
+		// If device is recovering/syncing at the moment, get the number of currently
+		// synced bytes, otherwise that number equals the size of the device.
+		syncedBlocks := size
+		if strings.Contains(lines[syncLineIdx], "recovery") || strings.Contains(lines[syncLineIdx], "resync") {
+			syncedBlocks, err = evalRecoveryLine(lines[syncLineIdx])
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		mdStats = append(mdStats, MDStat{
+			Name:          mdName,
+			ActivityState: activityState,
+			DisksActive:   active,
+			DisksTotal:    total,
+			BlocksTotal:   size,
+			BlocksSynced:  syncedBlocks,
+		})
+	}
+
+	return mdStats, nil
+}
+
+func evalStatusLine(statusline string) (active, total, size int64, err error) {
+	matches := statuslineRE.FindStringSubmatch(statusline)
+	if len(matches) != 4 {
+		return 0, 0, 0, fmt.Errorf("unexpected statusline: %s", statusline)
+	}
+
+	size, err = strconv.ParseInt(matches[1], 10, 64)
+	if err != nil {
+		return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err)
+	}
+
+	total, err = strconv.ParseInt(matches[2], 10, 64)
+	if err != nil {
+		return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err)
+	}
+
+	active, err = strconv.ParseInt(matches[3], 10, 64)
+	if err != nil {
+		return 0, 0, 0, fmt.Errorf("unexpected statusline %s: %s", statusline, err)
+	}
+
+	return active, total, size, nil
+}
+
+func evalRecoveryLine(buildline string) (syncedBlocks int64, err error) {
+	matches := buildlineRE.FindStringSubmatch(buildline)
+	if len(matches) != 2 {
+		return 0, fmt.Errorf("unexpected buildline: %s", buildline)
+	}
+
+	syncedBlocks, err = strconv.ParseInt(matches[1], 10, 64)
+	if err != nil {
+		return 0, fmt.Errorf("%s in buildline: %s", err, buildline)
+	}
+
+	return syncedBlocks, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/mountstats.go b/vendor/github.com/prometheus/procfs/mountstats.go
new file mode 100644
index 000000000..35b2ef351
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/mountstats.go
@@ -0,0 +1,621 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+// While implementing parsing of /proc/[pid]/mountstats, this blog was used
+// heavily as a reference:
+//   https://utcc.utoronto.ca/~cks/space/blog/linux/NFSMountstatsIndex
+//
+// Special thanks to Chris Siebenmann for all of his posts explaining the
+// various statistics available for NFS.
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Constants shared between multiple functions.
+const (
+	deviceEntryLen = 8
+
+	fieldBytesLen  = 8
+	fieldEventsLen = 27
+
+	statVersion10 = "1.0"
+	statVersion11 = "1.1"
+
+	fieldTransport10TCPLen = 10
+	fieldTransport10UDPLen = 7
+
+	fieldTransport11TCPLen = 13
+	fieldTransport11UDPLen = 10
+)
+
+// A Mount is a device mount parsed from /proc/[pid]/mountstats.
+type Mount struct {
+	// Name of the device.
+	Device string
+	// The mount point of the device.
+	Mount string
+	// The filesystem type used by the device.
+	Type string
+	// If available additional statistics related to this Mount.
+	// Use a type assertion to determine if additional statistics are available.
+	Stats MountStats
+}
+
+// A MountStats is a type which contains detailed statistics for a specific
+// type of Mount.
+type MountStats interface {
+	mountStats()
+}
+
+// A MountStatsNFS is a MountStats implementation for NFSv3 and v4 mounts.
+type MountStatsNFS struct {
+	// The version of statistics provided.
+	StatVersion string
+	// The mount options of the NFS mount.
+	Opts map[string]string
+	// The age of the NFS mount.
+	Age time.Duration
+	// Statistics related to byte counters for various operations.
+	Bytes NFSBytesStats
+	// Statistics related to various NFS event occurrences.
+	Events NFSEventsStats
+	// Statistics broken down by filesystem operation.
+	Operations []NFSOperationStats
+	// Statistics about the NFS RPC transport.
+	Transport NFSTransportStats
+}
+
+// mountStats implements MountStats.
+func (m MountStatsNFS) mountStats() {}
+
+// A NFSBytesStats contains statistics about the number of bytes read and written
+// by an NFS client to and from an NFS server.
+type NFSBytesStats struct {
+	// Number of bytes read using the read() syscall.
+	Read uint64
+	// Number of bytes written using the write() syscall.
+	Write uint64
+	// Number of bytes read using the read() syscall in O_DIRECT mode.
+	DirectRead uint64
+	// Number of bytes written using the write() syscall in O_DIRECT mode.
+	DirectWrite uint64
+	// Number of bytes read from the NFS server, in total.
+	ReadTotal uint64
+	// Number of bytes written to the NFS server, in total.
+	WriteTotal uint64
+	// Number of pages read directly via mmap()'d files.
+	ReadPages uint64
+	// Number of pages written directly via mmap()'d files.
+	WritePages uint64
+}
+
+// A NFSEventsStats contains statistics about NFS event occurrences.
+type NFSEventsStats struct {
+	// Number of times cached inode attributes are re-validated from the server.
+	InodeRevalidate uint64
+	// Number of times cached dentry nodes are re-validated from the server.
+	DnodeRevalidate uint64
+	// Number of times an inode cache is cleared.
+	DataInvalidate uint64
+	// Number of times cached inode attributes are invalidated.
+	AttributeInvalidate uint64
+	// Number of times files or directories have been open()'d.
+	VFSOpen uint64
+	// Number of times a directory lookup has occurred.
+	VFSLookup uint64
+	// Number of times permissions have been checked.
+	VFSAccess uint64
+	// Number of updates (and potential writes) to pages.
+	VFSUpdatePage uint64
+	// Number of pages read directly via mmap()'d files.
+	VFSReadPage uint64
+	// Number of times a group of pages have been read.
+	VFSReadPages uint64
+	// Number of pages written directly via mmap()'d files.
+	VFSWritePage uint64
+	// Number of times a group of pages have been written.
+	VFSWritePages uint64
+	// Number of times directory entries have been read with getdents().
+	VFSGetdents uint64
+	// Number of times attributes have been set on inodes.
+	VFSSetattr uint64
+	// Number of pending writes that have been forcefully flushed to the server.
+	VFSFlush uint64
+	// Number of times fsync() has been called on directories and files.
+	VFSFsync uint64
+	// Number of times locking has been attempted on a file.
+	VFSLock uint64
+	// Number of times files have been closed and released.
+	VFSFileRelease uint64
+	// Unknown.  Possibly unused.
+	CongestionWait uint64
+	// Number of times files have been truncated.
+	Truncation uint64
+	// Number of times a file has been grown due to writes beyond its existing end.
+	WriteExtension uint64
+	// Number of times a file was removed while still open by another process.
+	SillyRename uint64
+	// Number of times the NFS server gave less data than expected while reading.
+	ShortRead uint64
+	// Number of times the NFS server wrote less data than expected while writing.
+	ShortWrite uint64
+	// Number of times the NFS server indicated EJUKEBOX; retrieving data from
+	// offline storage.
+	JukeboxDelay uint64
+	// Number of NFS v4.1+ pNFS reads.
+	PNFSRead uint64
+	// Number of NFS v4.1+ pNFS writes.
+	PNFSWrite uint64
+}
+
+// A NFSOperationStats contains statistics for a single operation.
+type NFSOperationStats struct {
+	// The name of the operation.
+	Operation string
+	// Number of requests performed for this operation.
+	Requests uint64
+	// Number of times an actual RPC request has been transmitted for this operation.
+	Transmissions uint64
+	// Number of times a request has had a major timeout.
+	MajorTimeouts uint64
+	// Number of bytes sent for this operation, including RPC headers and payload.
+	BytesSent uint64
+	// Number of bytes received for this operation, including RPC headers and payload.
+	BytesReceived uint64
+	// Duration all requests spent queued for transmission before they were sent.
+	CumulativeQueueMilliseconds uint64
+	// Duration it took to get a reply back after the request was transmitted.
+	CumulativeTotalResponseMilliseconds uint64
+	// Duration from when a request was enqueued to when it was completely handled.
+	CumulativeTotalRequestMilliseconds uint64
+}
+
+// A NFSTransportStats contains statistics for the NFS mount RPC requests and
+// responses.
+type NFSTransportStats struct {
+	// The transport protocol used for the NFS mount.
+	Protocol string
+	// The local port used for the NFS mount.
+	Port uint64
+	// Number of times the client has had to establish a connection from scratch
+	// to the NFS server.
+	Bind uint64
+	// Number of times the client has made a TCP connection to the NFS server.
+	Connect uint64
+	// Duration (in jiffies, a kernel internal unit of time) the NFS mount has
+	// spent waiting for connections to the server to be established.
+	ConnectIdleTime uint64
+	// Duration since the NFS mount last saw any RPC traffic.
+	IdleTimeSeconds uint64
+	// Number of RPC requests for this mount sent to the NFS server.
+	Sends uint64
+	// Number of RPC responses for this mount received from the NFS server.
+	Receives uint64
+	// Number of times the NFS server sent a response with a transaction ID
+	// unknown to this client.
+	BadTransactionIDs uint64
+	// A running counter, incremented on each request as the current difference
+	// ebetween sends and receives.
+	CumulativeActiveRequests uint64
+	// A running counter, incremented on each request by the current backlog
+	// queue size.
+	CumulativeBacklog uint64
+
+	// Stats below only available with stat version 1.1.
+
+	// Maximum number of simultaneously active RPC requests ever used.
+	MaximumRPCSlotsUsed uint64
+	// A running counter, incremented on each request as the current size of the
+	// sending queue.
+	CumulativeSendingQueue uint64
+	// A running counter, incremented on each request as the current size of the
+	// pending queue.
+	CumulativePendingQueue uint64
+}
+
+// parseMountStats parses a /proc/[pid]/mountstats file and returns a slice
+// of Mount structures containing detailed information about each mount.
+// If available, statistics for each mount are parsed as well.
+func parseMountStats(r io.Reader) ([]*Mount, error) {
+	const (
+		device            = "device"
+		statVersionPrefix = "statvers="
+
+		nfs3Type = "nfs"
+		nfs4Type = "nfs4"
+	)
+
+	var mounts []*Mount
+
+	s := bufio.NewScanner(r)
+	for s.Scan() {
+		// Only look for device entries in this function
+		ss := strings.Fields(string(s.Bytes()))
+		if len(ss) == 0 || ss[0] != device {
+			continue
+		}
+
+		m, err := parseMount(ss)
+		if err != nil {
+			return nil, err
+		}
+
+		// Does this mount also possess statistics information?
+		if len(ss) > deviceEntryLen {
+			// Only NFSv3 and v4 are supported for parsing statistics
+			if m.Type != nfs3Type && m.Type != nfs4Type {
+				return nil, fmt.Errorf("cannot parse MountStats for fstype %q", m.Type)
+			}
+
+			statVersion := strings.TrimPrefix(ss[8], statVersionPrefix)
+
+			stats, err := parseMountStatsNFS(s, statVersion)
+			if err != nil {
+				return nil, err
+			}
+
+			m.Stats = stats
+		}
+
+		mounts = append(mounts, m)
+	}
+
+	return mounts, s.Err()
+}
+
+// parseMount parses an entry in /proc/[pid]/mountstats in the format:
+//   device [device] mounted on [mount] with fstype [type]
+func parseMount(ss []string) (*Mount, error) {
+	if len(ss) < deviceEntryLen {
+		return nil, fmt.Errorf("invalid device entry: %v", ss)
+	}
+
+	// Check for specific words appearing at specific indices to ensure
+	// the format is consistent with what we expect
+	format := []struct {
+		i int
+		s string
+	}{
+		{i: 0, s: "device"},
+		{i: 2, s: "mounted"},
+		{i: 3, s: "on"},
+		{i: 5, s: "with"},
+		{i: 6, s: "fstype"},
+	}
+
+	for _, f := range format {
+		if ss[f.i] != f.s {
+			return nil, fmt.Errorf("invalid device entry: %v", ss)
+		}
+	}
+
+	return &Mount{
+		Device: ss[1],
+		Mount:  ss[4],
+		Type:   ss[7],
+	}, nil
+}
+
+// parseMountStatsNFS parses a MountStatsNFS by scanning additional information
+// related to NFS statistics.
+func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, error) {
+	// Field indicators for parsing specific types of data
+	const (
+		fieldOpts       = "opts:"
+		fieldAge        = "age:"
+		fieldBytes      = "bytes:"
+		fieldEvents     = "events:"
+		fieldPerOpStats = "per-op"
+		fieldTransport  = "xprt:"
+	)
+
+	stats := &MountStatsNFS{
+		StatVersion: statVersion,
+	}
+
+	for s.Scan() {
+		ss := strings.Fields(string(s.Bytes()))
+		if len(ss) == 0 {
+			break
+		}
+		if len(ss) < 2 {
+			return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+		}
+
+		switch ss[0] {
+		case fieldOpts:
+			if stats.Opts == nil {
+				stats.Opts = map[string]string{}
+			}
+			for _, opt := range strings.Split(ss[1], ",") {
+				split := strings.Split(opt, "=")
+				if len(split) == 2 {
+					stats.Opts[split[0]] = split[1]
+				} else {
+					stats.Opts[opt] = ""
+				}
+			}
+		case fieldAge:
+			// Age integer is in seconds
+			d, err := time.ParseDuration(ss[1] + "s")
+			if err != nil {
+				return nil, err
+			}
+
+			stats.Age = d
+		case fieldBytes:
+			bstats, err := parseNFSBytesStats(ss[1:])
+			if err != nil {
+				return nil, err
+			}
+
+			stats.Bytes = *bstats
+		case fieldEvents:
+			estats, err := parseNFSEventsStats(ss[1:])
+			if err != nil {
+				return nil, err
+			}
+
+			stats.Events = *estats
+		case fieldTransport:
+			if len(ss) < 3 {
+				return nil, fmt.Errorf("not enough information for NFS transport stats: %v", ss)
+			}
+
+			tstats, err := parseNFSTransportStats(ss[1:], statVersion)
+			if err != nil {
+				return nil, err
+			}
+
+			stats.Transport = *tstats
+		}
+
+		// When encountering "per-operation statistics", we must break this
+		// loop and parse them separately to ensure we can terminate parsing
+		// before reaching another device entry; hence why this 'if' statement
+		// is not just another switch case
+		if ss[0] == fieldPerOpStats {
+			break
+		}
+	}
+
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+
+	// NFS per-operation stats appear last before the next device entry
+	perOpStats, err := parseNFSOperationStats(s)
+	if err != nil {
+		return nil, err
+	}
+
+	stats.Operations = perOpStats
+
+	return stats, nil
+}
+
+// parseNFSBytesStats parses a NFSBytesStats line using an input set of
+// integer fields.
+func parseNFSBytesStats(ss []string) (*NFSBytesStats, error) {
+	if len(ss) != fieldBytesLen {
+		return nil, fmt.Errorf("invalid NFS bytes stats: %v", ss)
+	}
+
+	ns := make([]uint64, 0, fieldBytesLen)
+	for _, s := range ss {
+		n, err := strconv.ParseUint(s, 10, 64)
+		if err != nil {
+			return nil, err
+		}
+
+		ns = append(ns, n)
+	}
+
+	return &NFSBytesStats{
+		Read:        ns[0],
+		Write:       ns[1],
+		DirectRead:  ns[2],
+		DirectWrite: ns[3],
+		ReadTotal:   ns[4],
+		WriteTotal:  ns[5],
+		ReadPages:   ns[6],
+		WritePages:  ns[7],
+	}, nil
+}
+
+// parseNFSEventsStats parses a NFSEventsStats line using an input set of
+// integer fields.
+func parseNFSEventsStats(ss []string) (*NFSEventsStats, error) {
+	if len(ss) != fieldEventsLen {
+		return nil, fmt.Errorf("invalid NFS events stats: %v", ss)
+	}
+
+	ns := make([]uint64, 0, fieldEventsLen)
+	for _, s := range ss {
+		n, err := strconv.ParseUint(s, 10, 64)
+		if err != nil {
+			return nil, err
+		}
+
+		ns = append(ns, n)
+	}
+
+	return &NFSEventsStats{
+		InodeRevalidate:     ns[0],
+		DnodeRevalidate:     ns[1],
+		DataInvalidate:      ns[2],
+		AttributeInvalidate: ns[3],
+		VFSOpen:             ns[4],
+		VFSLookup:           ns[5],
+		VFSAccess:           ns[6],
+		VFSUpdatePage:       ns[7],
+		VFSReadPage:         ns[8],
+		VFSReadPages:        ns[9],
+		VFSWritePage:        ns[10],
+		VFSWritePages:       ns[11],
+		VFSGetdents:         ns[12],
+		VFSSetattr:          ns[13],
+		VFSFlush:            ns[14],
+		VFSFsync:            ns[15],
+		VFSLock:             ns[16],
+		VFSFileRelease:      ns[17],
+		CongestionWait:      ns[18],
+		Truncation:          ns[19],
+		WriteExtension:      ns[20],
+		SillyRename:         ns[21],
+		ShortRead:           ns[22],
+		ShortWrite:          ns[23],
+		JukeboxDelay:        ns[24],
+		PNFSRead:            ns[25],
+		PNFSWrite:           ns[26],
+	}, nil
+}
+
+// parseNFSOperationStats parses a slice of NFSOperationStats by scanning
+// additional information about per-operation statistics until an empty
+// line is reached.
+func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
+	const (
+		// Number of expected fields in each per-operation statistics set
+		numFields = 9
+	)
+
+	var ops []NFSOperationStats
+
+	for s.Scan() {
+		ss := strings.Fields(string(s.Bytes()))
+		if len(ss) == 0 {
+			// Must break when reading a blank line after per-operation stats to
+			// enable top-level function to parse the next device entry
+			break
+		}
+
+		if len(ss) != numFields {
+			return nil, fmt.Errorf("invalid NFS per-operations stats: %v", ss)
+		}
+
+		// Skip string operation name for integers
+		ns := make([]uint64, 0, numFields-1)
+		for _, st := range ss[1:] {
+			n, err := strconv.ParseUint(st, 10, 64)
+			if err != nil {
+				return nil, err
+			}
+
+			ns = append(ns, n)
+		}
+
+		ops = append(ops, NFSOperationStats{
+			Operation:                           strings.TrimSuffix(ss[0], ":"),
+			Requests:                            ns[0],
+			Transmissions:                       ns[1],
+			MajorTimeouts:                       ns[2],
+			BytesSent:                           ns[3],
+			BytesReceived:                       ns[4],
+			CumulativeQueueMilliseconds:         ns[5],
+			CumulativeTotalResponseMilliseconds: ns[6],
+			CumulativeTotalRequestMilliseconds:  ns[7],
+		})
+	}
+
+	return ops, s.Err()
+}
+
+// parseNFSTransportStats parses a NFSTransportStats line using an input set of
+// integer fields matched to a specific stats version.
+func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats, error) {
+	// Extract the protocol field. It is the only string value in the line
+	protocol := ss[0]
+	ss = ss[1:]
+
+	switch statVersion {
+	case statVersion10:
+		var expectedLength int
+		if protocol == "tcp" {
+			expectedLength = fieldTransport10TCPLen
+		} else if protocol == "udp" {
+			expectedLength = fieldTransport10UDPLen
+		} else {
+			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.0 statement: %v", protocol, ss)
+		}
+		if len(ss) != expectedLength {
+			return nil, fmt.Errorf("invalid NFS transport stats 1.0 statement: %v", ss)
+		}
+	case statVersion11:
+		var expectedLength int
+		if protocol == "tcp" {
+			expectedLength = fieldTransport11TCPLen
+		} else if protocol == "udp" {
+			expectedLength = fieldTransport11UDPLen
+		} else {
+			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.1 statement: %v", protocol, ss)
+		}
+		if len(ss) != expectedLength {
+			return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss)
+		}
+	default:
+		return nil, fmt.Errorf("unrecognized NFS transport stats version: %q", statVersion)
+	}
+
+	// Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay
+	// in a v1.0 response. Since the stat length is bigger for TCP stats, we use
+	// the TCP length here.
+	//
+	// Note: slice length must be set to length of v1.1 stats to avoid a panic when
+	// only v1.0 stats are present.
+	// See: https://github.com/prometheus/node_exporter/issues/571.
+	ns := make([]uint64, fieldTransport11TCPLen)
+	for i, s := range ss {
+		n, err := strconv.ParseUint(s, 10, 64)
+		if err != nil {
+			return nil, err
+		}
+
+		ns[i] = n
+	}
+
+	// The fields differ depending on the transport protocol (TCP or UDP)
+	// From https://utcc.utoronto.ca/%7Ecks/space/blog/linux/NFSMountstatsXprt
+	//
+	// For the udp RPC transport there is no connection count, connect idle time,
+	// or idle time (fields #3, #4, and #5); all other fields are the same. So
+	// we set them to 0 here.
+	if protocol == "udp" {
+		ns = append(ns[:2], append(make([]uint64, 3), ns[2:]...)...)
+	}
+
+	return &NFSTransportStats{
+		Protocol:                 protocol,
+		Port:                     ns[0],
+		Bind:                     ns[1],
+		Connect:                  ns[2],
+		ConnectIdleTime:          ns[3],
+		IdleTimeSeconds:          ns[4],
+		Sends:                    ns[5],
+		Receives:                 ns[6],
+		BadTransactionIDs:        ns[7],
+		CumulativeActiveRequests: ns[8],
+		CumulativeBacklog:        ns[9],
+		MaximumRPCSlotsUsed:      ns[10],
+		CumulativeSendingQueue:   ns[11],
+		CumulativePendingQueue:   ns[12],
+	}, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/net_dev.go b/vendor/github.com/prometheus/procfs/net_dev.go
new file mode 100644
index 000000000..a0b7a0119
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/net_dev.go
@@ -0,0 +1,206 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"errors"
+	"os"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+// NetDevLine is single line parsed from /proc/net/dev or /proc/[pid]/net/dev.
+type NetDevLine struct {
+	Name         string `json:"name"`          // The name of the interface.
+	RxBytes      uint64 `json:"rx_bytes"`      // Cumulative count of bytes received.
+	RxPackets    uint64 `json:"rx_packets"`    // Cumulative count of packets received.
+	RxErrors     uint64 `json:"rx_errors"`     // Cumulative count of receive errors encountered.
+	RxDropped    uint64 `json:"rx_dropped"`    // Cumulative count of packets dropped while receiving.
+	RxFIFO       uint64 `json:"rx_fifo"`       // Cumulative count of FIFO buffer errors.
+	RxFrame      uint64 `json:"rx_frame"`      // Cumulative count of packet framing errors.
+	RxCompressed uint64 `json:"rx_compressed"` // Cumulative count of compressed packets received by the device driver.
+	RxMulticast  uint64 `json:"rx_multicast"`  // Cumulative count of multicast frames received by the device driver.
+	TxBytes      uint64 `json:"tx_bytes"`      // Cumulative count of bytes transmitted.
+	TxPackets    uint64 `json:"tx_packets"`    // Cumulative count of packets transmitted.
+	TxErrors     uint64 `json:"tx_errors"`     // Cumulative count of transmit errors encountered.
+	TxDropped    uint64 `json:"tx_dropped"`    // Cumulative count of packets dropped while transmitting.
+	TxFIFO       uint64 `json:"tx_fifo"`       // Cumulative count of FIFO buffer errors.
+	TxCollisions uint64 `json:"tx_collisions"` // Cumulative count of collisions detected on the interface.
+	TxCarrier    uint64 `json:"tx_carrier"`    // Cumulative count of carrier losses detected by the device driver.
+	TxCompressed uint64 `json:"tx_compressed"` // Cumulative count of compressed packets transmitted by the device driver.
+}
+
+// NetDev is parsed from /proc/net/dev or /proc/[pid]/net/dev. The map keys
+// are interface names.
+type NetDev map[string]NetDevLine
+
+// NetDev returns kernel/system statistics read from /proc/net/dev.
+func (fs FS) NetDev() (NetDev, error) {
+	return newNetDev(fs.proc.Path("net/dev"))
+}
+
+// NetDev returns kernel/system statistics read from /proc/[pid]/net/dev.
+func (p Proc) NetDev() (NetDev, error) {
+	return newNetDev(p.path("net/dev"))
+}
+
+// newNetDev creates a new NetDev from the contents of the given file.
+func newNetDev(file string) (NetDev, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return NetDev{}, err
+	}
+	defer f.Close()
+
+	netDev := NetDev{}
+	s := bufio.NewScanner(f)
+	for n := 0; s.Scan(); n++ {
+		// Skip the 2 header lines.
+		if n < 2 {
+			continue
+		}
+
+		line, err := netDev.parseLine(s.Text())
+		if err != nil {
+			return netDev, err
+		}
+
+		netDev[line.Name] = *line
+	}
+
+	return netDev, s.Err()
+}
+
+// parseLine parses a single line from the /proc/net/dev file. Header lines
+// must be filtered prior to calling this method.
+func (netDev NetDev) parseLine(rawLine string) (*NetDevLine, error) {
+	parts := strings.SplitN(rawLine, ":", 2)
+	if len(parts) != 2 {
+		return nil, errors.New("invalid net/dev line, missing colon")
+	}
+	fields := strings.Fields(strings.TrimSpace(parts[1]))
+
+	var err error
+	line := &NetDevLine{}
+
+	// Interface Name
+	line.Name = strings.TrimSpace(parts[0])
+	if line.Name == "" {
+		return nil, errors.New("invalid net/dev line, empty interface name")
+	}
+
+	// RX
+	line.RxBytes, err = strconv.ParseUint(fields[0], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxPackets, err = strconv.ParseUint(fields[1], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxErrors, err = strconv.ParseUint(fields[2], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxDropped, err = strconv.ParseUint(fields[3], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxFIFO, err = strconv.ParseUint(fields[4], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxFrame, err = strconv.ParseUint(fields[5], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxCompressed, err = strconv.ParseUint(fields[6], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.RxMulticast, err = strconv.ParseUint(fields[7], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+
+	// TX
+	line.TxBytes, err = strconv.ParseUint(fields[8], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxPackets, err = strconv.ParseUint(fields[9], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxErrors, err = strconv.ParseUint(fields[10], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxDropped, err = strconv.ParseUint(fields[11], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxFIFO, err = strconv.ParseUint(fields[12], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxCollisions, err = strconv.ParseUint(fields[13], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxCarrier, err = strconv.ParseUint(fields[14], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.TxCompressed, err = strconv.ParseUint(fields[15], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+
+	return line, nil
+}
+
+// Total aggregates the values across interfaces and returns a new NetDevLine.
+// The Name field will be a sorted comma separated list of interface names.
+func (netDev NetDev) Total() NetDevLine {
+	total := NetDevLine{}
+
+	names := make([]string, 0, len(netDev))
+	for _, ifc := range netDev {
+		names = append(names, ifc.Name)
+		total.RxBytes += ifc.RxBytes
+		total.RxPackets += ifc.RxPackets
+		total.RxPackets += ifc.RxPackets
+		total.RxErrors += ifc.RxErrors
+		total.RxDropped += ifc.RxDropped
+		total.RxFIFO += ifc.RxFIFO
+		total.RxFrame += ifc.RxFrame
+		total.RxCompressed += ifc.RxCompressed
+		total.RxMulticast += ifc.RxMulticast
+		total.TxBytes += ifc.TxBytes
+		total.TxPackets += ifc.TxPackets
+		total.TxErrors += ifc.TxErrors
+		total.TxDropped += ifc.TxDropped
+		total.TxFIFO += ifc.TxFIFO
+		total.TxCollisions += ifc.TxCollisions
+		total.TxCarrier += ifc.TxCarrier
+		total.TxCompressed += ifc.TxCompressed
+	}
+	sort.Strings(names)
+	total.Name = strings.Join(names, ", ")
+
+	return total
+}
diff --git a/vendor/github.com/prometheus/procfs/net_unix.go b/vendor/github.com/prometheus/procfs/net_unix.go
new file mode 100644
index 000000000..240340a83
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/net_unix.go
@@ -0,0 +1,275 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// For the proc file format details,
+// see https://elixir.bootlin.com/linux/v4.17/source/net/unix/af_unix.c#L2815
+// and https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/net.h#L48.
+
+const (
+	netUnixKernelPtrIdx = iota
+	netUnixRefCountIdx
+	_
+	netUnixFlagsIdx
+	netUnixTypeIdx
+	netUnixStateIdx
+	netUnixInodeIdx
+
+	// Inode and Path are optional.
+	netUnixStaticFieldsCnt = 6
+)
+
+const (
+	netUnixTypeStream    = 1
+	netUnixTypeDgram     = 2
+	netUnixTypeSeqpacket = 5
+
+	netUnixFlagListen = 1 << 16
+
+	netUnixStateUnconnected  = 1
+	netUnixStateConnecting   = 2
+	netUnixStateConnected    = 3
+	netUnixStateDisconnected = 4
+)
+
+var errInvalidKernelPtrFmt = errors.New("Invalid Num(the kernel table slot number) format")
+
+// NetUnixType is the type of the type field.
+type NetUnixType uint64
+
+// NetUnixFlags is the type of the flags field.
+type NetUnixFlags uint64
+
+// NetUnixState is the type of the state field.
+type NetUnixState uint64
+
+// NetUnixLine represents a line of /proc/net/unix.
+type NetUnixLine struct {
+	KernelPtr string
+	RefCount  uint64
+	Protocol  uint64
+	Flags     NetUnixFlags
+	Type      NetUnixType
+	State     NetUnixState
+	Inode     uint64
+	Path      string
+}
+
+// NetUnix holds the data read from /proc/net/unix.
+type NetUnix struct {
+	Rows []*NetUnixLine
+}
+
+// NewNetUnix returns data read from /proc/net/unix.
+func NewNetUnix() (*NetUnix, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return nil, err
+	}
+
+	return fs.NewNetUnix()
+}
+
+// NewNetUnix returns data read from /proc/net/unix.
+func (fs FS) NewNetUnix() (*NetUnix, error) {
+	return NewNetUnixByPath(fs.proc.Path("net/unix"))
+}
+
+// NewNetUnixByPath returns data read from /proc/net/unix by file path.
+// It might returns an error with partial parsed data, if an error occur after some data parsed.
+func NewNetUnixByPath(path string) (*NetUnix, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	return NewNetUnixByReader(f)
+}
+
+// NewNetUnixByReader returns data read from /proc/net/unix by a reader.
+// It might returns an error with partial parsed data, if an error occur after some data parsed.
+func NewNetUnixByReader(reader io.Reader) (*NetUnix, error) {
+	nu := &NetUnix{
+		Rows: make([]*NetUnixLine, 0, 32),
+	}
+	scanner := bufio.NewScanner(reader)
+	// Omit the header line.
+	scanner.Scan()
+	header := scanner.Text()
+	// From the man page of proc(5), it does not contain an Inode field,
+	// but in actually it exists.
+	// This code works for both cases.
+	hasInode := strings.Contains(header, "Inode")
+
+	minFieldsCnt := netUnixStaticFieldsCnt
+	if hasInode {
+		minFieldsCnt++
+	}
+	for scanner.Scan() {
+		line := scanner.Text()
+		item, err := nu.parseLine(line, hasInode, minFieldsCnt)
+		if err != nil {
+			return nu, err
+		}
+		nu.Rows = append(nu.Rows, item)
+	}
+
+	return nu, scanner.Err()
+}
+
+func (u *NetUnix) parseLine(line string, hasInode bool, minFieldsCnt int) (*NetUnixLine, error) {
+	fields := strings.Fields(line)
+	fieldsLen := len(fields)
+	if fieldsLen < minFieldsCnt {
+		return nil, fmt.Errorf(
+			"Parse Unix domain failed: expect at least %d fields but got %d",
+			minFieldsCnt, fieldsLen)
+	}
+	kernelPtr, err := u.parseKernelPtr(fields[netUnixKernelPtrIdx])
+	if err != nil {
+		return nil, fmt.Errorf("Parse Unix domain num(%s) failed: %s", fields[netUnixKernelPtrIdx], err)
+	}
+	users, err := u.parseUsers(fields[netUnixRefCountIdx])
+	if err != nil {
+		return nil, fmt.Errorf("Parse Unix domain ref count(%s) failed: %s", fields[netUnixRefCountIdx], err)
+	}
+	flags, err := u.parseFlags(fields[netUnixFlagsIdx])
+	if err != nil {
+		return nil, fmt.Errorf("Parse Unix domain flags(%s) failed: %s", fields[netUnixFlagsIdx], err)
+	}
+	typ, err := u.parseType(fields[netUnixTypeIdx])
+	if err != nil {
+		return nil, fmt.Errorf("Parse Unix domain type(%s) failed: %s", fields[netUnixTypeIdx], err)
+	}
+	state, err := u.parseState(fields[netUnixStateIdx])
+	if err != nil {
+		return nil, fmt.Errorf("Parse Unix domain state(%s) failed: %s", fields[netUnixStateIdx], err)
+	}
+	var inode uint64
+	if hasInode {
+		inodeStr := fields[netUnixInodeIdx]
+		inode, err = u.parseInode(inodeStr)
+		if err != nil {
+			return nil, fmt.Errorf("Parse Unix domain inode(%s) failed: %s", inodeStr, err)
+		}
+	}
+
+	nuLine := &NetUnixLine{
+		KernelPtr: kernelPtr,
+		RefCount:  users,
+		Type:      typ,
+		Flags:     flags,
+		State:     state,
+		Inode:     inode,
+	}
+
+	// Path field is optional.
+	if fieldsLen > minFieldsCnt {
+		pathIdx := netUnixInodeIdx + 1
+		if !hasInode {
+			pathIdx--
+		}
+		nuLine.Path = fields[pathIdx]
+	}
+
+	return nuLine, nil
+}
+
+func (u NetUnix) parseKernelPtr(str string) (string, error) {
+	if !strings.HasSuffix(str, ":") {
+		return "", errInvalidKernelPtrFmt
+	}
+	return str[:len(str)-1], nil
+}
+
+func (u NetUnix) parseUsers(hexStr string) (uint64, error) {
+	return strconv.ParseUint(hexStr, 16, 32)
+}
+
+func (u NetUnix) parseProtocol(hexStr string) (uint64, error) {
+	return strconv.ParseUint(hexStr, 16, 32)
+}
+
+func (u NetUnix) parseType(hexStr string) (NetUnixType, error) {
+	typ, err := strconv.ParseUint(hexStr, 16, 16)
+	if err != nil {
+		return 0, err
+	}
+	return NetUnixType(typ), nil
+}
+
+func (u NetUnix) parseFlags(hexStr string) (NetUnixFlags, error) {
+	flags, err := strconv.ParseUint(hexStr, 16, 32)
+	if err != nil {
+		return 0, err
+	}
+	return NetUnixFlags(flags), nil
+}
+
+func (u NetUnix) parseState(hexStr string) (NetUnixState, error) {
+	st, err := strconv.ParseInt(hexStr, 16, 8)
+	if err != nil {
+		return 0, err
+	}
+	return NetUnixState(st), nil
+}
+
+func (u NetUnix) parseInode(inodeStr string) (uint64, error) {
+	return strconv.ParseUint(inodeStr, 10, 64)
+}
+
+func (t NetUnixType) String() string {
+	switch t {
+	case netUnixTypeStream:
+		return "stream"
+	case netUnixTypeDgram:
+		return "dgram"
+	case netUnixTypeSeqpacket:
+		return "seqpacket"
+	}
+	return "unknown"
+}
+
+func (f NetUnixFlags) String() string {
+	switch f {
+	case netUnixFlagListen:
+		return "listen"
+	default:
+		return "default"
+	}
+}
+
+func (s NetUnixState) String() string {
+	switch s {
+	case netUnixStateUnconnected:
+		return "unconnected"
+	case netUnixStateConnecting:
+		return "connecting"
+	case netUnixStateConnected:
+		return "connected"
+	case netUnixStateDisconnected:
+		return "disconnected"
+	}
+	return "unknown"
+}
diff --git a/vendor/github.com/prometheus/procfs/proc.go b/vendor/github.com/prometheus/procfs/proc.go
new file mode 100644
index 000000000..8a8430147
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc.go
@@ -0,0 +1,267 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/fs"
+)
+
+// Proc provides information about a running process.
+type Proc struct {
+	// The process ID.
+	PID int
+
+	fs fs.FS
+}
+
+// Procs represents a list of Proc structs.
+type Procs []Proc
+
+func (p Procs) Len() int           { return len(p) }
+func (p Procs) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
+func (p Procs) Less(i, j int) bool { return p[i].PID < p[j].PID }
+
+// Self returns a process for the current process read via /proc/self.
+func Self() (Proc, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return Proc{}, err
+	}
+	return fs.Self()
+}
+
+// NewProc returns a process for the given pid under /proc.
+func NewProc(pid int) (Proc, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return Proc{}, err
+	}
+	return fs.Proc(pid)
+}
+
+// AllProcs returns a list of all currently available processes under /proc.
+func AllProcs() (Procs, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return Procs{}, err
+	}
+	return fs.AllProcs()
+}
+
+// Self returns a process for the current process.
+func (fs FS) Self() (Proc, error) {
+	p, err := os.Readlink(fs.proc.Path("self"))
+	if err != nil {
+		return Proc{}, err
+	}
+	pid, err := strconv.Atoi(strings.Replace(p, string(fs.proc), "", -1))
+	if err != nil {
+		return Proc{}, err
+	}
+	return fs.Proc(pid)
+}
+
+// NewProc returns a process for the given pid.
+//
+// Deprecated: use fs.Proc() instead
+func (fs FS) NewProc(pid int) (Proc, error) {
+	return fs.Proc(pid)
+}
+
+// Proc returns a process for the given pid.
+func (fs FS) Proc(pid int) (Proc, error) {
+	if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil {
+		return Proc{}, err
+	}
+	return Proc{PID: pid, fs: fs.proc}, nil
+}
+
+// AllProcs returns a list of all currently available processes.
+func (fs FS) AllProcs() (Procs, error) {
+	d, err := os.Open(fs.proc.Path())
+	if err != nil {
+		return Procs{}, err
+	}
+	defer d.Close()
+
+	names, err := d.Readdirnames(-1)
+	if err != nil {
+		return Procs{}, fmt.Errorf("could not read %s: %s", d.Name(), err)
+	}
+
+	p := Procs{}
+	for _, n := range names {
+		pid, err := strconv.ParseInt(n, 10, 64)
+		if err != nil {
+			continue
+		}
+		p = append(p, Proc{PID: int(pid), fs: fs.proc})
+	}
+
+	return p, nil
+}
+
+// CmdLine returns the command line of a process.
+func (p Proc) CmdLine() ([]string, error) {
+	f, err := os.Open(p.path("cmdline"))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(data) < 1 {
+		return []string{}, nil
+	}
+
+	return strings.Split(string(bytes.TrimRight(data, string("\x00"))), string(byte(0))), nil
+}
+
+// Comm returns the command name of a process.
+func (p Proc) Comm() (string, error) {
+	f, err := os.Open(p.path("comm"))
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(data)), nil
+}
+
+// Executable returns the absolute path of the executable command of a process.
+func (p Proc) Executable() (string, error) {
+	exe, err := os.Readlink(p.path("exe"))
+	if os.IsNotExist(err) {
+		return "", nil
+	}
+
+	return exe, err
+}
+
+// Cwd returns the absolute path to the current working directory of the process.
+func (p Proc) Cwd() (string, error) {
+	wd, err := os.Readlink(p.path("cwd"))
+	if os.IsNotExist(err) {
+		return "", nil
+	}
+
+	return wd, err
+}
+
+// RootDir returns the absolute path to the process's root directory (as set by chroot)
+func (p Proc) RootDir() (string, error) {
+	rdir, err := os.Readlink(p.path("root"))
+	if os.IsNotExist(err) {
+		return "", nil
+	}
+
+	return rdir, err
+}
+
+// FileDescriptors returns the currently open file descriptors of a process.
+func (p Proc) FileDescriptors() ([]uintptr, error) {
+	names, err := p.fileDescriptors()
+	if err != nil {
+		return nil, err
+	}
+
+	fds := make([]uintptr, len(names))
+	for i, n := range names {
+		fd, err := strconv.ParseInt(n, 10, 32)
+		if err != nil {
+			return nil, fmt.Errorf("could not parse fd %s: %s", n, err)
+		}
+		fds[i] = uintptr(fd)
+	}
+
+	return fds, nil
+}
+
+// FileDescriptorTargets returns the targets of all file descriptors of a process.
+// If a file descriptor is not a symlink to a file (like a socket), that value will be the empty string.
+func (p Proc) FileDescriptorTargets() ([]string, error) {
+	names, err := p.fileDescriptors()
+	if err != nil {
+		return nil, err
+	}
+
+	targets := make([]string, len(names))
+
+	for i, name := range names {
+		target, err := os.Readlink(p.path("fd", name))
+		if err == nil {
+			targets[i] = target
+		}
+	}
+
+	return targets, nil
+}
+
+// FileDescriptorsLen returns the number of currently open file descriptors of
+// a process.
+func (p Proc) FileDescriptorsLen() (int, error) {
+	fds, err := p.fileDescriptors()
+	if err != nil {
+		return 0, err
+	}
+
+	return len(fds), nil
+}
+
+// MountStats retrieves statistics and configuration for mount points in a
+// process's namespace.
+func (p Proc) MountStats() ([]*Mount, error) {
+	f, err := os.Open(p.path("mountstats"))
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return parseMountStats(f)
+}
+
+func (p Proc) fileDescriptors() ([]string, error) {
+	d, err := os.Open(p.path("fd"))
+	if err != nil {
+		return nil, err
+	}
+	defer d.Close()
+
+	names, err := d.Readdirnames(-1)
+	if err != nil {
+		return nil, fmt.Errorf("could not read %s: %s", d.Name(), err)
+	}
+
+	return names, nil
+}
+
+func (p Proc) path(pa ...string) string {
+	return p.fs.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_io.go b/vendor/github.com/prometheus/procfs/proc_io.go
new file mode 100644
index 000000000..0ff89b1ce
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_io.go
@@ -0,0 +1,65 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+// ProcIO models the content of /proc/<pid>/io.
+type ProcIO struct {
+	// Chars read.
+	RChar uint64
+	// Chars written.
+	WChar uint64
+	// Read syscalls.
+	SyscR uint64
+	// Write syscalls.
+	SyscW uint64
+	// Bytes read.
+	ReadBytes uint64
+	// Bytes written.
+	WriteBytes uint64
+	// Bytes written, but taking into account truncation. See
+	// Documentation/filesystems/proc.txt in the kernel sources for
+	// detailed explanation.
+	CancelledWriteBytes int64
+}
+
+// IO creates a new ProcIO instance from a given Proc instance.
+func (p Proc) IO() (ProcIO, error) {
+	pio := ProcIO{}
+
+	f, err := os.Open(p.path("io"))
+	if err != nil {
+		return pio, err
+	}
+	defer f.Close()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return pio, err
+	}
+
+	ioFormat := "rchar: %d\nwchar: %d\nsyscr: %d\nsyscw: %d\n" +
+		"read_bytes: %d\nwrite_bytes: %d\n" +
+		"cancelled_write_bytes: %d\n"
+
+	_, err = fmt.Sscanf(string(data), ioFormat, &pio.RChar, &pio.WChar, &pio.SyscR,
+		&pio.SyscW, &pio.ReadBytes, &pio.WriteBytes, &pio.CancelledWriteBytes)
+
+	return pio, err
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_limits.go b/vendor/github.com/prometheus/procfs/proc_limits.go
new file mode 100644
index 000000000..91ee24df8
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_limits.go
@@ -0,0 +1,157 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+)
+
+// ProcLimits represents the soft limits for each of the process's resource
+// limits. For more information see getrlimit(2):
+// http://man7.org/linux/man-pages/man2/getrlimit.2.html.
+type ProcLimits struct {
+	// CPU time limit in seconds.
+	CPUTime int64
+	// Maximum size of files that the process may create.
+	FileSize int64
+	// Maximum size of the process's data segment (initialized data,
+	// uninitialized data, and heap).
+	DataSize int64
+	// Maximum size of the process stack in bytes.
+	StackSize int64
+	// Maximum size of a core file.
+	CoreFileSize int64
+	// Limit of the process's resident set in pages.
+	ResidentSet int64
+	// Maximum number of processes that can be created for the real user ID of
+	// the calling process.
+	Processes int64
+	// Value one greater than the maximum file descriptor number that can be
+	// opened by this process.
+	OpenFiles int64
+	// Maximum number of bytes of memory that may be locked into RAM.
+	LockedMemory int64
+	// Maximum size of the process's virtual memory address space in bytes.
+	AddressSpace int64
+	// Limit on the combined number of flock(2) locks and fcntl(2) leases that
+	// this process may establish.
+	FileLocks int64
+	// Limit of signals that may be queued for the real user ID of the calling
+	// process.
+	PendingSignals int64
+	// Limit on the number of bytes that can be allocated for POSIX message
+	// queues for the real user ID of the calling process.
+	MsqqueueSize int64
+	// Limit of the nice priority set using setpriority(2) or nice(2).
+	NicePriority int64
+	// Limit of the real-time priority set using sched_setscheduler(2) or
+	// sched_setparam(2).
+	RealtimePriority int64
+	// Limit (in microseconds) on the amount of CPU time that a process
+	// scheduled under a real-time scheduling policy may consume without making
+	// a blocking system call.
+	RealtimeTimeout int64
+}
+
+const (
+	limitsFields    = 3
+	limitsUnlimited = "unlimited"
+)
+
+var (
+	limitsDelimiter = regexp.MustCompile("  +")
+)
+
+// NewLimits returns the current soft limits of the process.
+//
+// Deprecated: use p.Limits() instead
+func (p Proc) NewLimits() (ProcLimits, error) {
+	return p.Limits()
+}
+
+// Limits returns the current soft limits of the process.
+func (p Proc) Limits() (ProcLimits, error) {
+	f, err := os.Open(p.path("limits"))
+	if err != nil {
+		return ProcLimits{}, err
+	}
+	defer f.Close()
+
+	var (
+		l = ProcLimits{}
+		s = bufio.NewScanner(f)
+	)
+	for s.Scan() {
+		fields := limitsDelimiter.Split(s.Text(), limitsFields)
+		if len(fields) != limitsFields {
+			return ProcLimits{}, fmt.Errorf(
+				"couldn't parse %s line %s", f.Name(), s.Text())
+		}
+
+		switch fields[0] {
+		case "Max cpu time":
+			l.CPUTime, err = parseInt(fields[1])
+		case "Max file size":
+			l.FileSize, err = parseInt(fields[1])
+		case "Max data size":
+			l.DataSize, err = parseInt(fields[1])
+		case "Max stack size":
+			l.StackSize, err = parseInt(fields[1])
+		case "Max core file size":
+			l.CoreFileSize, err = parseInt(fields[1])
+		case "Max resident set":
+			l.ResidentSet, err = parseInt(fields[1])
+		case "Max processes":
+			l.Processes, err = parseInt(fields[1])
+		case "Max open files":
+			l.OpenFiles, err = parseInt(fields[1])
+		case "Max locked memory":
+			l.LockedMemory, err = parseInt(fields[1])
+		case "Max address space":
+			l.AddressSpace, err = parseInt(fields[1])
+		case "Max file locks":
+			l.FileLocks, err = parseInt(fields[1])
+		case "Max pending signals":
+			l.PendingSignals, err = parseInt(fields[1])
+		case "Max msgqueue size":
+			l.MsqqueueSize, err = parseInt(fields[1])
+		case "Max nice priority":
+			l.NicePriority, err = parseInt(fields[1])
+		case "Max realtime priority":
+			l.RealtimePriority, err = parseInt(fields[1])
+		case "Max realtime timeout":
+			l.RealtimeTimeout, err = parseInt(fields[1])
+		}
+		if err != nil {
+			return ProcLimits{}, err
+		}
+	}
+
+	return l, s.Err()
+}
+
+func parseInt(s string) (int64, error) {
+	if s == limitsUnlimited {
+		return -1, nil
+	}
+	i, err := strconv.ParseInt(s, 10, 64)
+	if err != nil {
+		return 0, fmt.Errorf("couldn't parse value %s: %s", s, err)
+	}
+	return i, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_ns.go b/vendor/github.com/prometheus/procfs/proc_ns.go
new file mode 100644
index 000000000..c66740ff7
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_ns.go
@@ -0,0 +1,68 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// Namespace represents a single namespace of a process.
+type Namespace struct {
+	Type  string // Namespace type.
+	Inode uint32 // Inode number of the namespace. If two processes are in the same namespace their inodes will match.
+}
+
+// Namespaces contains all of the namespaces that the process is contained in.
+type Namespaces map[string]Namespace
+
+// Namespaces reads from /proc/<pid>/ns/* to get the namespaces of which the
+// process is a member.
+func (p Proc) Namespaces() (Namespaces, error) {
+	d, err := os.Open(p.path("ns"))
+	if err != nil {
+		return nil, err
+	}
+	defer d.Close()
+
+	names, err := d.Readdirnames(-1)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read contents of ns dir: %v", err)
+	}
+
+	ns := make(Namespaces, len(names))
+	for _, name := range names {
+		target, err := os.Readlink(p.path("ns", name))
+		if err != nil {
+			return nil, err
+		}
+
+		fields := strings.SplitN(target, ":", 2)
+		if len(fields) != 2 {
+			return nil, fmt.Errorf("failed to parse namespace type and inode from '%v'", target)
+		}
+
+		typ := fields[0]
+		inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse inode from '%v': %v", fields[1], err)
+		}
+
+		ns[name] = Namespace{typ, uint32(inode)}
+	}
+
+	return ns, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_psi.go b/vendor/github.com/prometheus/procfs/proc_psi.go
new file mode 100644
index 000000000..46fe26626
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_psi.go
@@ -0,0 +1,101 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+// The PSI / pressure interface is described at
+//   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/accounting/psi.txt
+// Each resource (cpu, io, memory, ...) is exposed as a single file.
+// Each file may contain up to two lines, one for "some" pressure and one for "full" pressure.
+// Each line contains several averages (over n seconds) and a total in µs.
+//
+// Example io pressure file:
+// > some avg10=0.06 avg60=0.21 avg300=0.99 total=8537362
+// > full avg10=0.00 avg60=0.13 avg300=0.96 total=8183134
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"strings"
+)
+
+const lineFormat = "avg10=%f avg60=%f avg300=%f total=%d"
+
+// PSILine is a single line of values as returned by /proc/pressure/*
+// The Avg entries are averages over n seconds, as a percentage
+// The Total line is in microseconds
+type PSILine struct {
+	Avg10  float64
+	Avg60  float64
+	Avg300 float64
+	Total  uint64
+}
+
+// PSIStats represent pressure stall information from /proc/pressure/*
+// Some indicates the share of time in which at least some tasks are stalled
+// Full indicates the share of time in which all non-idle tasks are stalled simultaneously
+type PSIStats struct {
+	Some *PSILine
+	Full *PSILine
+}
+
+// PSIStatsForResource reads pressure stall information for the specified
+// resource from /proc/pressure/<resource>. At time of writing this can be
+// either "cpu", "memory" or "io".
+func (fs FS) PSIStatsForResource(resource string) (PSIStats, error) {
+	file, err := os.Open(fs.proc.Path(fmt.Sprintf("%s/%s", "pressure", resource)))
+	if err != nil {
+		return PSIStats{}, fmt.Errorf("psi_stats: unavailable for %s", resource)
+	}
+
+	defer file.Close()
+	return parsePSIStats(resource, file)
+}
+
+// parsePSIStats parses the specified file for pressure stall information
+func parsePSIStats(resource string, file io.Reader) (PSIStats, error) {
+	psiStats := PSIStats{}
+	stats, err := ioutil.ReadAll(file)
+	if err != nil {
+		return psiStats, fmt.Errorf("psi_stats: unable to read data for %s", resource)
+	}
+
+	for _, l := range strings.Split(string(stats), "\n") {
+		prefix := strings.Split(l, " ")[0]
+		switch prefix {
+		case "some":
+			psi := PSILine{}
+			_, err := fmt.Sscanf(l, fmt.Sprintf("some %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total)
+			if err != nil {
+				return PSIStats{}, err
+			}
+			psiStats.Some = &psi
+		case "full":
+			psi := PSILine{}
+			_, err := fmt.Sscanf(l, fmt.Sprintf("full %s", lineFormat), &psi.Avg10, &psi.Avg60, &psi.Avg300, &psi.Total)
+			if err != nil {
+				return PSIStats{}, err
+			}
+			psiStats.Full = &psi
+		default:
+			// If we encounter a line with an unknown prefix, ignore it and move on
+			// Should new measurement types be added in the future we'll simply ignore them instead
+			// of erroring on retrieval
+			continue
+		}
+	}
+
+	return psiStats, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_stat.go b/vendor/github.com/prometheus/procfs/proc_stat.go
new file mode 100644
index 000000000..6ed98a8ae
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_stat.go
@@ -0,0 +1,198 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/prometheus/procfs/internal/fs"
+)
+
+// Originally, this USER_HZ value was dynamically retrieved via a sysconf call
+// which required cgo. However, that caused a lot of problems regarding
+// cross-compilation. Alternatives such as running a binary to determine the
+// value, or trying to derive it in some other way were all problematic.  After
+// much research it was determined that USER_HZ is actually hardcoded to 100 on
+// all Go-supported platforms as of the time of this writing. This is why we
+// decided to hardcode it here as well. It is not impossible that there could
+// be systems with exceptions, but they should be very exotic edge cases, and
+// in that case, the worst outcome will be two misreported metrics.
+//
+// See also the following discussions:
+//
+// - https://github.com/prometheus/node_exporter/issues/52
+// - https://github.com/prometheus/procfs/pull/2
+// - http://stackoverflow.com/questions/17410841/how-does-user-hz-solve-the-jiffy-scaling-issue
+const userHZ = 100
+
+// ProcStat provides status information about the process,
+// read from /proc/[pid]/stat.
+type ProcStat struct {
+	// The process ID.
+	PID int
+	// The filename of the executable.
+	Comm string
+	// The process state.
+	State string
+	// The PID of the parent of this process.
+	PPID int
+	// The process group ID of the process.
+	PGRP int
+	// The session ID of the process.
+	Session int
+	// The controlling terminal of the process.
+	TTY int
+	// The ID of the foreground process group of the controlling terminal of
+	// the process.
+	TPGID int
+	// The kernel flags word of the process.
+	Flags uint
+	// The number of minor faults the process has made which have not required
+	// loading a memory page from disk.
+	MinFlt uint
+	// The number of minor faults that the process's waited-for children have
+	// made.
+	CMinFlt uint
+	// The number of major faults the process has made which have required
+	// loading a memory page from disk.
+	MajFlt uint
+	// The number of major faults that the process's waited-for children have
+	// made.
+	CMajFlt uint
+	// Amount of time that this process has been scheduled in user mode,
+	// measured in clock ticks.
+	UTime uint
+	// Amount of time that this process has been scheduled in kernel mode,
+	// measured in clock ticks.
+	STime uint
+	// Amount of time that this process's waited-for children have been
+	// scheduled in user mode, measured in clock ticks.
+	CUTime uint
+	// Amount of time that this process's waited-for children have been
+	// scheduled in kernel mode, measured in clock ticks.
+	CSTime uint
+	// For processes running a real-time scheduling policy, this is the negated
+	// scheduling priority, minus one.
+	Priority int
+	// The nice value, a value in the range 19 (low priority) to -20 (high
+	// priority).
+	Nice int
+	// Number of threads in this process.
+	NumThreads int
+	// The time the process started after system boot, the value is expressed
+	// in clock ticks.
+	Starttime uint64
+	// Virtual memory size in bytes.
+	VSize uint
+	// Resident set size in pages.
+	RSS int
+
+	proc fs.FS
+}
+
+// NewStat returns the current status information of the process.
+//
+// Deprecated: use NewStat() instead
+func (p Proc) NewStat() (ProcStat, error) {
+	return p.Stat()
+}
+
+// Stat returns the current status information of the process.
+func (p Proc) Stat() (ProcStat, error) {
+	f, err := os.Open(p.path("stat"))
+	if err != nil {
+		return ProcStat{}, err
+	}
+	defer f.Close()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return ProcStat{}, err
+	}
+
+	var (
+		ignore int
+
+		s = ProcStat{PID: p.PID, proc: p.fs}
+		l = bytes.Index(data, []byte("("))
+		r = bytes.LastIndex(data, []byte(")"))
+	)
+
+	if l < 0 || r < 0 {
+		return ProcStat{}, fmt.Errorf(
+			"unexpected format, couldn't extract comm: %s",
+			data,
+		)
+	}
+
+	s.Comm = string(data[l+1 : r])
+	_, err = fmt.Fscan(
+		bytes.NewBuffer(data[r+2:]),
+		&s.State,
+		&s.PPID,
+		&s.PGRP,
+		&s.Session,
+		&s.TTY,
+		&s.TPGID,
+		&s.Flags,
+		&s.MinFlt,
+		&s.CMinFlt,
+		&s.MajFlt,
+		&s.CMajFlt,
+		&s.UTime,
+		&s.STime,
+		&s.CUTime,
+		&s.CSTime,
+		&s.Priority,
+		&s.Nice,
+		&s.NumThreads,
+		&ignore,
+		&s.Starttime,
+		&s.VSize,
+		&s.RSS,
+	)
+	if err != nil {
+		return ProcStat{}, err
+	}
+
+	return s, nil
+}
+
+// VirtualMemory returns the virtual memory size in bytes.
+func (s ProcStat) VirtualMemory() uint {
+	return s.VSize
+}
+
+// ResidentMemory returns the resident memory size in bytes.
+func (s ProcStat) ResidentMemory() int {
+	return s.RSS * os.Getpagesize()
+}
+
+// StartTime returns the unix timestamp of the process in seconds.
+func (s ProcStat) StartTime() (float64, error) {
+	fs := FS{proc: s.proc}
+	stat, err := fs.Stat()
+	if err != nil {
+		return 0, err
+	}
+	return float64(stat.BootTime) + (float64(s.Starttime) / userHZ), nil
+}
+
+// CPUTime returns the total CPU user and system time in seconds.
+func (s ProcStat) CPUTime() float64 {
+	return float64(s.UTime+s.STime) / userHZ
+}
diff --git a/vendor/github.com/prometheus/procfs/proc_status.go b/vendor/github.com/prometheus/procfs/proc_status.go
new file mode 100644
index 000000000..6b4b61f71
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_status.go
@@ -0,0 +1,162 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// ProcStat provides status information about the process,
+// read from /proc/[pid]/stat.
+type ProcStatus struct {
+	// The process ID.
+	PID int
+	// The process name.
+	Name string
+
+	// Peak virtual memory size.
+	VmPeak uint64
+	// Virtual memory size.
+	VmSize uint64
+	// Locked memory size.
+	VmLck uint64
+	// Pinned memory size.
+	VmPin uint64
+	// Peak resident set size.
+	VmHWM uint64
+	// Resident set size (sum of RssAnnon RssFile and RssShmem).
+	VmRSS uint64
+	// Size of resident anonymous memory.
+	RssAnon uint64
+	// Size of resident file mappings.
+	RssFile uint64
+	// Size of resident shared memory.
+	RssShmem uint64
+	// Size of data segments.
+	VmData uint64
+	// Size of stack segments.
+	VmStk uint64
+	// Size of text segments.
+	VmExe uint64
+	// Shared library code size.
+	VmLib uint64
+	// Page table entries size.
+	VmPTE uint64
+	// Size of second-level page tables.
+	VmPMD uint64
+	// Swapped-out virtual memory size by anonymous private.
+	VmSwap uint64
+	// Size of hugetlb memory portions
+	HugetlbPages uint64
+
+	// Number of voluntary context switches.
+	VoluntaryCtxtSwitches uint64
+	// Number of involuntary context switches.
+	NonVoluntaryCtxtSwitches uint64
+}
+
+// NewStatus returns the current status information of the process.
+func (p Proc) NewStatus() (ProcStatus, error) {
+	f, err := os.Open(p.path("status"))
+	if err != nil {
+		return ProcStatus{}, err
+	}
+	defer f.Close()
+
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return ProcStatus{}, err
+	}
+
+	s := ProcStatus{PID: p.PID}
+
+	lines := strings.Split(string(data), "\n")
+	for _, line := range lines {
+		if !bytes.Contains([]byte(line), []byte(":")) {
+			continue
+		}
+
+		kv := strings.SplitN(line, ":", 2)
+
+		// removes spaces
+		k := string(strings.TrimSpace(kv[0]))
+		v := string(strings.TrimSpace(kv[1]))
+		// removes "kB"
+		v = string(bytes.Trim([]byte(v), " kB"))
+
+		// value to int when possible
+		// we can skip error check here, 'cause vKBytes is not used when value is a string
+		vKBytes, _ := strconv.ParseUint(v, 10, 64)
+		// convert kB to B
+		vBytes := vKBytes * 1024
+
+		s.fillStatus(k, v, vKBytes, vBytes)
+	}
+
+	return s, nil
+}
+
+func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintBytes uint64) {
+	switch k {
+	case "Name":
+		s.Name = vString
+	case "VmPeak":
+		s.VmPeak = vUintBytes
+	case "VmSize":
+		s.VmSize = vUintBytes
+	case "VmLck":
+		s.VmLck = vUintBytes
+	case "VmPin":
+		s.VmPin = vUintBytes
+	case "VmHWM":
+		s.VmHWM = vUintBytes
+	case "VmRSS":
+		s.VmRSS = vUintBytes
+	case "RssAnon":
+		s.RssAnon = vUintBytes
+	case "RssFile":
+		s.RssFile = vUintBytes
+	case "RssShmem":
+		s.RssShmem = vUintBytes
+	case "VmData":
+		s.VmData = vUintBytes
+	case "VmStk":
+		s.VmStk = vUintBytes
+	case "VmExe":
+		s.VmExe = vUintBytes
+	case "VmLib":
+		s.VmLib = vUintBytes
+	case "VmPTE":
+		s.VmPTE = vUintBytes
+	case "VmPMD":
+		s.VmPMD = vUintBytes
+	case "VmSwap":
+		s.VmSwap = vUintBytes
+	case "HugetlbPages":
+		s.HugetlbPages = vUintBytes
+	case "voluntary_ctxt_switches":
+		s.VoluntaryCtxtSwitches = vUint
+	case "nonvoluntary_ctxt_switches":
+		s.NonVoluntaryCtxtSwitches = vUint
+	}
+}
+
+// TotalCtxtSwitches returns the total context switch.
+func (s ProcStatus) TotalCtxtSwitches() uint64 {
+	return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches
+}
diff --git a/vendor/github.com/prometheus/procfs/stat.go b/vendor/github.com/prometheus/procfs/stat.go
new file mode 100644
index 000000000..6661ee03a
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/stat.go
@@ -0,0 +1,244 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/fs"
+)
+
+// CPUStat shows how much time the cpu spend in various stages.
+type CPUStat struct {
+	User      float64
+	Nice      float64
+	System    float64
+	Idle      float64
+	Iowait    float64
+	IRQ       float64
+	SoftIRQ   float64
+	Steal     float64
+	Guest     float64
+	GuestNice float64
+}
+
+// SoftIRQStat represent the softirq statistics as exported in the procfs stat file.
+// A nice introduction can be found at https://0xax.gitbooks.io/linux-insides/content/interrupts/interrupts-9.html
+// It is possible to get per-cpu stats by reading /proc/softirqs
+type SoftIRQStat struct {
+	Hi          uint64
+	Timer       uint64
+	NetTx       uint64
+	NetRx       uint64
+	Block       uint64
+	BlockIoPoll uint64
+	Tasklet     uint64
+	Sched       uint64
+	Hrtimer     uint64
+	Rcu         uint64
+}
+
+// Stat represents kernel/system statistics.
+type Stat struct {
+	// Boot time in seconds since the Epoch.
+	BootTime uint64
+	// Summed up cpu statistics.
+	CPUTotal CPUStat
+	// Per-CPU statistics.
+	CPU []CPUStat
+	// Number of times interrupts were handled, which contains numbered and unnumbered IRQs.
+	IRQTotal uint64
+	// Number of times a numbered IRQ was triggered.
+	IRQ []uint64
+	// Number of times a context switch happened.
+	ContextSwitches uint64
+	// Number of times a process was created.
+	ProcessCreated uint64
+	// Number of processes currently running.
+	ProcessesRunning uint64
+	// Number of processes currently blocked (waiting for IO).
+	ProcessesBlocked uint64
+	// Number of times a softirq was scheduled.
+	SoftIRQTotal uint64
+	// Detailed softirq statistics.
+	SoftIRQ SoftIRQStat
+}
+
+// Parse a cpu statistics line and returns the CPUStat struct plus the cpu id (or -1 for the overall sum).
+func parseCPUStat(line string) (CPUStat, int64, error) {
+	cpuStat := CPUStat{}
+	var cpu string
+
+	count, err := fmt.Sscanf(line, "%s %f %f %f %f %f %f %f %f %f %f",
+		&cpu,
+		&cpuStat.User, &cpuStat.Nice, &cpuStat.System, &cpuStat.Idle,
+		&cpuStat.Iowait, &cpuStat.IRQ, &cpuStat.SoftIRQ, &cpuStat.Steal,
+		&cpuStat.Guest, &cpuStat.GuestNice)
+
+	if err != nil && err != io.EOF {
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu): %s", line, err)
+	}
+	if count == 0 {
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu): 0 elements parsed", line)
+	}
+
+	cpuStat.User /= userHZ
+	cpuStat.Nice /= userHZ
+	cpuStat.System /= userHZ
+	cpuStat.Idle /= userHZ
+	cpuStat.Iowait /= userHZ
+	cpuStat.IRQ /= userHZ
+	cpuStat.SoftIRQ /= userHZ
+	cpuStat.Steal /= userHZ
+	cpuStat.Guest /= userHZ
+	cpuStat.GuestNice /= userHZ
+
+	if cpu == "cpu" {
+		return cpuStat, -1, nil
+	}
+
+	cpuID, err := strconv.ParseInt(cpu[3:], 10, 64)
+	if err != nil {
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu/cpuid): %s", line, err)
+	}
+
+	return cpuStat, cpuID, nil
+}
+
+// Parse a softirq line.
+func parseSoftIRQStat(line string) (SoftIRQStat, uint64, error) {
+	softIRQStat := SoftIRQStat{}
+	var total uint64
+	var prefix string
+
+	_, err := fmt.Sscanf(line, "%s %d %d %d %d %d %d %d %d %d %d %d",
+		&prefix, &total,
+		&softIRQStat.Hi, &softIRQStat.Timer, &softIRQStat.NetTx, &softIRQStat.NetRx,
+		&softIRQStat.Block, &softIRQStat.BlockIoPoll,
+		&softIRQStat.Tasklet, &softIRQStat.Sched,
+		&softIRQStat.Hrtimer, &softIRQStat.Rcu)
+
+	if err != nil {
+		return SoftIRQStat{}, 0, fmt.Errorf("couldn't parse %s (softirq): %s", line, err)
+	}
+
+	return softIRQStat, total, nil
+}
+
+// NewStat returns information about current cpu/process statistics.
+// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
+//
+// Deprecated: use fs.Stat() instead
+func NewStat() (Stat, error) {
+	fs, err := NewFS(fs.DefaultProcMountPoint)
+	if err != nil {
+		return Stat{}, err
+	}
+	return fs.Stat()
+}
+
+// NewStat returns information about current cpu/process statistics.
+// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
+//
+// Deprecated: use fs.Stat() instead
+func (fs FS) NewStat() (Stat, error) {
+	return fs.Stat()
+}
+
+// Stat returns information about current cpu/process statistics.
+// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
+func (fs FS) Stat() (Stat, error) {
+
+	f, err := os.Open(fs.proc.Path("stat"))
+	if err != nil {
+		return Stat{}, err
+	}
+	defer f.Close()
+
+	stat := Stat{}
+
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+		parts := strings.Fields(scanner.Text())
+		// require at least <key> <value>
+		if len(parts) < 2 {
+			continue
+		}
+		switch {
+		case parts[0] == "btime":
+			if stat.BootTime, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (btime): %s", parts[1], err)
+			}
+		case parts[0] == "intr":
+			if stat.IRQTotal, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (intr): %s", parts[1], err)
+			}
+			numberedIRQs := parts[2:]
+			stat.IRQ = make([]uint64, len(numberedIRQs))
+			for i, count := range numberedIRQs {
+				if stat.IRQ[i], err = strconv.ParseUint(count, 10, 64); err != nil {
+					return Stat{}, fmt.Errorf("couldn't parse %s (intr%d): %s", count, i, err)
+				}
+			}
+		case parts[0] == "ctxt":
+			if stat.ContextSwitches, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (ctxt): %s", parts[1], err)
+			}
+		case parts[0] == "processes":
+			if stat.ProcessCreated, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (processes): %s", parts[1], err)
+			}
+		case parts[0] == "procs_running":
+			if stat.ProcessesRunning, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (procs_running): %s", parts[1], err)
+			}
+		case parts[0] == "procs_blocked":
+			if stat.ProcessesBlocked, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
+				return Stat{}, fmt.Errorf("couldn't parse %s (procs_blocked): %s", parts[1], err)
+			}
+		case parts[0] == "softirq":
+			softIRQStats, total, err := parseSoftIRQStat(line)
+			if err != nil {
+				return Stat{}, err
+			}
+			stat.SoftIRQTotal = total
+			stat.SoftIRQ = softIRQStats
+		case strings.HasPrefix(parts[0], "cpu"):
+			cpuStat, cpuID, err := parseCPUStat(line)
+			if err != nil {
+				return Stat{}, err
+			}
+			if cpuID == -1 {
+				stat.CPUTotal = cpuStat
+			} else {
+				for int64(len(stat.CPU)) <= cpuID {
+					stat.CPU = append(stat.CPU, CPUStat{})
+				}
+				stat.CPU[cpuID] = cpuStat
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return Stat{}, fmt.Errorf("couldn't parse %s: %s", f.Name(), err)
+	}
+
+	return stat, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/ttar b/vendor/github.com/prometheus/procfs/ttar
new file mode 100644
index 000000000..19ef02b8d
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/ttar
@@ -0,0 +1,413 @@
+#!/usr/bin/env bash
+
+# Purpose: plain text tar format
+# Limitations: - only suitable for text files, directories, and symlinks
+#              - stores only filename, content, and mode
+#              - not designed for untrusted input
+#
+# Note: must work with bash version 3.2 (macOS)
+
+# Copyright 2017 Roger Luethi
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit -o nounset
+
+# Sanitize environment (for instance, standard sorting of glob matches)
+export LC_ALL=C
+
+path=""
+CMD=""
+ARG_STRING="$*"
+
+#------------------------------------------------------------------------------
+# Not all sed implementations can work on null bytes. In order to make ttar
+# work out of the box on macOS, use Python as a stream editor.
+
+USE_PYTHON=0
+
+PYTHON_CREATE_FILTER=$(cat << 'PCF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'EOF', r'\EOF', line)
+    line = re.sub(r'NULLBYTE', r'\NULLBYTE', line)
+    line = re.sub('\x00', r'NULLBYTE', line)
+    sys.stdout.write(line)
+PCF
+)
+
+PYTHON_EXTRACT_FILTER=$(cat << 'PEF'
+#!/usr/bin/env python
+
+import re
+import sys
+
+for line in sys.stdin:
+    line = re.sub(r'(?<!\\)NULLBYTE', '\x00', line)
+    line = re.sub(r'\\NULLBYTE', 'NULLBYTE', line)
+    line = re.sub(r'([^\\])EOF', r'\1', line)
+    line = re.sub(r'\\EOF', 'EOF', line)
+    sys.stdout.write(line)
+PEF
+)
+
+function test_environment {
+    if [[ "$(echo "a" | sed 's/a/\x0/' | wc -c)" -ne 2 ]]; then
+        echo "WARNING sed unable to handle null bytes, using Python (slow)."
+        if ! which python >/dev/null; then
+            echo "ERROR Python not found. Aborting."
+            exit 2
+        fi
+        USE_PYTHON=1
+    fi
+}
+
+#------------------------------------------------------------------------------
+
+function usage {
+    bname=$(basename "$0")
+    cat << USAGE
+Usage:   $bname [-C <DIR>] -c -f <ARCHIVE> <FILE...> (create archive)
+         $bname            -t -f <ARCHIVE>           (list archive contents)
+         $bname [-C <DIR>] -x -f <ARCHIVE>           (extract archive)
+
+Options:
+         -C <DIR>           (change directory)
+         -v                 (verbose)
+         --recursive-unlink (recursively delete existing directory if path
+                             collides with file or directory to extract)
+
+Example: Change to sysfs directory, create ttar file from fixtures directory
+         $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/
+USAGE
+exit "$1"
+}
+
+function vecho {
+    if [ "${VERBOSE:-}" == "yes" ]; then
+        echo >&7 "$@"
+    fi
+}
+
+function set_cmd {
+    if [ -n "$CMD" ]; then
+        echo "ERROR: more than one command given"
+        echo
+        usage 2
+    fi
+    CMD=$1
+}
+
+unset VERBOSE
+unset RECURSIVE_UNLINK
+
+while getopts :cf:-:htxvC: opt; do
+    case $opt in
+        c)
+            set_cmd "create"
+            ;;
+        f)
+            ARCHIVE=$OPTARG
+            ;;
+        h)
+            usage 0
+            ;;
+        t)
+            set_cmd "list"
+            ;;
+        x)
+            set_cmd "extract"
+            ;;
+        v)
+            VERBOSE=yes
+            exec 7>&1
+            ;;
+        C)
+            CDIR=$OPTARG
+            ;;
+        -)
+            case $OPTARG in
+                recursive-unlink)
+                    RECURSIVE_UNLINK="yes"
+                    ;;
+                *)
+                    echo -e "Error: invalid option -$OPTARG"
+                    echo
+                    usage 1
+                    ;;
+            esac
+            ;;
+        *)
+            echo >&2 "ERROR: invalid option -$OPTARG"
+            echo
+            usage 1
+            ;;
+    esac
+done
+
+# Remove processed options from arguments
+shift $(( OPTIND - 1 ));
+
+if [ "${CMD:-}" == "" ]; then
+    echo >&2 "ERROR: no command given"
+    echo
+    usage 1
+elif [ "${ARCHIVE:-}" == "" ]; then
+    echo >&2 "ERROR: no archive name given"
+    echo
+    usage 1
+fi
+
+function list {
+    local path=""
+    local size=0
+    local line_no=0
+    local ttar_file=$1
+    if [ -n "${2:-}" ]; then
+        echo >&2 "ERROR: too many arguments."
+        echo
+        usage 1
+    fi
+    if [ ! -e "$ttar_file" ]; then
+        echo >&2 "ERROR: file not found ($ttar_file)"
+        echo
+        usage 1
+    fi
+    while read -r line; do
+        line_no=$(( line_no + 1 ))
+        if [ $size -gt 0 ]; then
+            size=$(( size - 1 ))
+            continue
+        fi
+        if [[ $line =~ ^Path:\ (.*)$ ]]; then
+            path=${BASH_REMATCH[1]}
+        elif [[ $line =~ ^Lines:\ (.*)$ ]]; then
+            size=${BASH_REMATCH[1]}
+            echo "$path"
+        elif [[ $line =~ ^Directory:\ (.*)$ ]]; then
+            path=${BASH_REMATCH[1]}
+            echo "$path/"
+        elif [[ $line =~ ^SymlinkTo:\ (.*)$ ]]; then
+            echo  "$path -> ${BASH_REMATCH[1]}"
+        fi
+    done < "$ttar_file"
+}
+
+function extract {
+    local path=""
+    local size=0
+    local line_no=0
+    local ttar_file=$1
+    if [ -n "${2:-}" ]; then
+        echo >&2 "ERROR: too many arguments."
+        echo
+        usage 1
+    fi
+    if [ ! -e "$ttar_file" ]; then
+        echo >&2 "ERROR: file not found ($ttar_file)"
+        echo
+        usage 1
+    fi
+    while IFS= read -r line; do
+        line_no=$(( line_no + 1 ))
+        local eof_without_newline
+        if [ "$size" -gt 0 ]; then
+            if [[ "$line" =~ [^\\]EOF ]]; then
+                # An EOF not preceded by a backslash indicates that the line
+                # does not end with a newline
+                eof_without_newline=1
+            else
+                eof_without_newline=0
+            fi
+            # Replace NULLBYTE with null byte if at beginning of line
+            # Replace NULLBYTE with null byte unless preceded by backslash
+            # Remove one backslash in front of NULLBYTE (if any)
+            # Remove EOF unless preceded by backslash
+            # Remove one backslash in front of EOF
+            if [ $USE_PYTHON -eq 1 ]; then
+                echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path"
+            else
+                # The repeated pattern makes up for sed's lack of negative
+                # lookbehind assertions (for consecutive null bytes).
+                echo -n "$line" | \
+                    sed -e 's/^NULLBYTE/\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\([^\\]\)NULLBYTE/\1\x0/g;
+                            s/\\NULLBYTE/NULLBYTE/g;
+                            s/\([^\\]\)EOF/\1/g;
+                            s/\\EOF/EOF/g;
+                    ' >> "$path"
+            fi
+            if [[ "$eof_without_newline" -eq 0 ]]; then
+                echo >> "$path"
+            fi
+            size=$(( size - 1 ))
+            continue
+        fi
+        if [[ $line =~ ^Path:\ (.*)$ ]]; then
+            path=${BASH_REMATCH[1]}
+            if [ -L "$path" ]; then
+                rm "$path"
+            elif [ -d "$path" ]; then
+                if [ "${RECURSIVE_UNLINK:-}" == "yes" ]; then
+                    rm -r "$path"
+                else
+                    # Safe because symlinks to directories are dealt with above
+                    rmdir "$path"
+                fi
+            elif [ -e "$path" ]; then
+                rm "$path"
+            fi
+        elif [[ $line =~ ^Lines:\ (.*)$ ]]; then
+            size=${BASH_REMATCH[1]}
+            # Create file even if it is zero-length.
+            touch "$path"
+            vecho "    $path"
+        elif [[ $line =~ ^Mode:\ (.*)$ ]]; then
+            mode=${BASH_REMATCH[1]}
+            chmod "$mode" "$path"
+            vecho "$mode"
+        elif [[ $line =~ ^Directory:\ (.*)$ ]]; then
+            path=${BASH_REMATCH[1]}
+            mkdir -p "$path"
+            vecho "    $path/"
+        elif [[ $line =~ ^SymlinkTo:\ (.*)$ ]]; then
+            ln -s "${BASH_REMATCH[1]}" "$path"
+            vecho "    $path -> ${BASH_REMATCH[1]}"
+        elif [[ $line =~ ^# ]]; then
+            # Ignore comments between files
+            continue
+        else
+            echo >&2 "ERROR: Unknown keyword on line $line_no: $line"
+            exit 1
+        fi
+    done < "$ttar_file"
+}
+
+function div {
+    echo "# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" \
+         "- - - - - -"
+}
+
+function get_mode {
+    local mfile=$1
+    if [ -z "${STAT_OPTION:-}" ]; then
+        if stat -c '%a' "$mfile" >/dev/null 2>&1; then
+            # GNU stat
+            STAT_OPTION='-c'
+            STAT_FORMAT='%a'
+        else
+            # BSD stat
+            STAT_OPTION='-f'
+            # Octal output, user/group/other (omit file type, sticky bit)
+            STAT_FORMAT='%OLp'
+        fi
+    fi
+    stat "${STAT_OPTION}" "${STAT_FORMAT}" "$mfile"
+}
+
+function _create {
+    shopt -s nullglob
+    local mode
+    local eof_without_newline
+    while (( "$#" )); do
+        file=$1
+        if [ -L "$file" ]; then
+            echo "Path: $file"
+            symlinkTo=$(readlink "$file")
+            echo "SymlinkTo: $symlinkTo"
+            vecho "    $file -> $symlinkTo"
+            div
+        elif [ -d "$file" ]; then
+            # Strip trailing slash (if there is one)
+            file=${file%/}
+            echo "Directory: $file"
+            mode=$(get_mode "$file")
+            echo "Mode: $mode"
+            vecho "$mode $file/"
+            div
+            # Find all files and dirs, including hidden/dot files
+            for x in "$file/"{*,.[^.]*}; do
+                _create "$x"
+            done
+        elif [ -f "$file" ]; then
+            echo "Path: $file"
+            lines=$(wc -l "$file"|awk '{print $1}')
+            eof_without_newline=0
+            if [[ "$(wc -c "$file"|awk '{print $1}')" -gt 0 ]] && \
+                    [[ "$(tail -c 1 "$file" | wc -l)" -eq 0 ]]; then
+                eof_without_newline=1
+                lines=$((lines+1))
+            fi
+            echo "Lines: $lines"
+            # Add backslash in front of EOF
+            # Add backslash in front of NULLBYTE
+            # Replace null byte with NULLBYTE
+            if [ $USE_PYTHON -eq 1 ]; then
+                < "$file" python -c "$PYTHON_CREATE_FILTER"
+            else
+                < "$file" \
+                    sed 's/EOF/\\EOF/g;
+                            s/NULLBYTE/\\NULLBYTE/g;
+                            s/\x0/NULLBYTE/g;
+                    '
+            fi
+            if [[ "$eof_without_newline" -eq 1 ]]; then
+                # Finish line with EOF to indicate that the original line did
+                # not end with a linefeed
+                echo "EOF"
+            fi
+            mode=$(get_mode "$file")
+            echo "Mode: $mode"
+            vecho "$mode $file"
+            div
+        else
+            echo >&2 "ERROR: file not found ($file in $(pwd))"
+            exit 2
+        fi
+        shift
+    done
+}
+
+function create {
+    ttar_file=$1
+    shift
+    if [ -z "${1:-}" ]; then
+        echo >&2 "ERROR: missing arguments."
+        echo
+        usage 1
+    fi
+    if [ -e "$ttar_file" ]; then
+        rm "$ttar_file"
+    fi
+    exec > "$ttar_file"
+    echo "# Archive created by ttar $ARG_STRING"
+    _create "$@"
+}
+
+test_environment
+
+if [ -n "${CDIR:-}" ]; then
+    if [[ "$ARCHIVE" != /* ]]; then
+        # Relative path: preserve the archive's location before changing
+        # directory
+        ARCHIVE="$(pwd)/$ARCHIVE"
+    fi
+    cd "$CDIR"
+fi
+
+"$CMD" "$ARCHIVE" "$@"
diff --git a/vendor/github.com/prometheus/procfs/xfrm.go b/vendor/github.com/prometheus/procfs/xfrm.go
new file mode 100644
index 000000000..30aa417d5
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/xfrm.go
@@ -0,0 +1,187 @@
+// Copyright 2017 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// XfrmStat models the contents of /proc/net/xfrm_stat.
+type XfrmStat struct {
+	// All errors which are not matched by other
+	XfrmInError int
+	// No buffer is left
+	XfrmInBufferError int
+	// Header Error
+	XfrmInHdrError int
+	// No state found
+	// i.e. either inbound SPI, address, or IPSEC protocol at SA is wrong
+	XfrmInNoStates int
+	// Transformation protocol specific error
+	// e.g. SA Key is wrong
+	XfrmInStateProtoError int
+	// Transformation mode specific error
+	XfrmInStateModeError int
+	// Sequence error
+	// e.g. sequence number is out of window
+	XfrmInStateSeqError int
+	// State is expired
+	XfrmInStateExpired int
+	// State has mismatch option
+	// e.g. UDP encapsulation type is mismatched
+	XfrmInStateMismatch int
+	// State is invalid
+	XfrmInStateInvalid int
+	// No matching template for states
+	// e.g. Inbound SAs are correct but SP rule is wrong
+	XfrmInTmplMismatch int
+	// No policy is found for states
+	// e.g. Inbound SAs are correct but no SP is found
+	XfrmInNoPols int
+	// Policy discards
+	XfrmInPolBlock int
+	// Policy error
+	XfrmInPolError int
+	// All errors which are not matched by others
+	XfrmOutError int
+	// Bundle generation error
+	XfrmOutBundleGenError int
+	// Bundle check error
+	XfrmOutBundleCheckError int
+	// No state was found
+	XfrmOutNoStates int
+	// Transformation protocol specific error
+	XfrmOutStateProtoError int
+	// Transportation mode specific error
+	XfrmOutStateModeError int
+	// Sequence error
+	// i.e sequence number overflow
+	XfrmOutStateSeqError int
+	// State is expired
+	XfrmOutStateExpired int
+	// Policy discads
+	XfrmOutPolBlock int
+	// Policy is dead
+	XfrmOutPolDead int
+	// Policy Error
+	XfrmOutPolError     int
+	XfrmFwdHdrError     int
+	XfrmOutStateInvalid int
+	XfrmAcquireError    int
+}
+
+// NewXfrmStat reads the xfrm_stat statistics.
+func NewXfrmStat() (XfrmStat, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return XfrmStat{}, err
+	}
+
+	return fs.NewXfrmStat()
+}
+
+// NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem.
+func (fs FS) NewXfrmStat() (XfrmStat, error) {
+	file, err := os.Open(fs.proc.Path("net/xfrm_stat"))
+	if err != nil {
+		return XfrmStat{}, err
+	}
+	defer file.Close()
+
+	var (
+		x = XfrmStat{}
+		s = bufio.NewScanner(file)
+	)
+
+	for s.Scan() {
+		fields := strings.Fields(s.Text())
+
+		if len(fields) != 2 {
+			return XfrmStat{}, fmt.Errorf(
+				"couldn't parse %s line %s", file.Name(), s.Text())
+		}
+
+		name := fields[0]
+		value, err := strconv.Atoi(fields[1])
+		if err != nil {
+			return XfrmStat{}, err
+		}
+
+		switch name {
+		case "XfrmInError":
+			x.XfrmInError = value
+		case "XfrmInBufferError":
+			x.XfrmInBufferError = value
+		case "XfrmInHdrError":
+			x.XfrmInHdrError = value
+		case "XfrmInNoStates":
+			x.XfrmInNoStates = value
+		case "XfrmInStateProtoError":
+			x.XfrmInStateProtoError = value
+		case "XfrmInStateModeError":
+			x.XfrmInStateModeError = value
+		case "XfrmInStateSeqError":
+			x.XfrmInStateSeqError = value
+		case "XfrmInStateExpired":
+			x.XfrmInStateExpired = value
+		case "XfrmInStateInvalid":
+			x.XfrmInStateInvalid = value
+		case "XfrmInTmplMismatch":
+			x.XfrmInTmplMismatch = value
+		case "XfrmInNoPols":
+			x.XfrmInNoPols = value
+		case "XfrmInPolBlock":
+			x.XfrmInPolBlock = value
+		case "XfrmInPolError":
+			x.XfrmInPolError = value
+		case "XfrmOutError":
+			x.XfrmOutError = value
+		case "XfrmInStateMismatch":
+			x.XfrmInStateMismatch = value
+		case "XfrmOutBundleGenError":
+			x.XfrmOutBundleGenError = value
+		case "XfrmOutBundleCheckError":
+			x.XfrmOutBundleCheckError = value
+		case "XfrmOutNoStates":
+			x.XfrmOutNoStates = value
+		case "XfrmOutStateProtoError":
+			x.XfrmOutStateProtoError = value
+		case "XfrmOutStateModeError":
+			x.XfrmOutStateModeError = value
+		case "XfrmOutStateSeqError":
+			x.XfrmOutStateSeqError = value
+		case "XfrmOutStateExpired":
+			x.XfrmOutStateExpired = value
+		case "XfrmOutPolBlock":
+			x.XfrmOutPolBlock = value
+		case "XfrmOutPolDead":
+			x.XfrmOutPolDead = value
+		case "XfrmOutPolError":
+			x.XfrmOutPolError = value
+		case "XfrmFwdHdrError":
+			x.XfrmFwdHdrError = value
+		case "XfrmOutStateInvalid":
+			x.XfrmOutStateInvalid = value
+		case "XfrmAcquireError":
+			x.XfrmAcquireError = value
+		}
+
+	}
+
+	return x, s.Err()
+}
diff --git a/vendor/github.com/seccomp/containers-golang/seccomp.json b/vendor/github.com/seccomp/containers-golang/seccomp.json
new file mode 100644
index 000000000..fe9eda56a
--- /dev/null
+++ b/vendor/github.com/seccomp/containers-golang/seccomp.json
@@ -0,0 +1,773 @@
+{
+	"defaultAction": "SCMP_ACT_ERRNO",
+	"archMap": [
+		{
+			"architecture": "SCMP_ARCH_X86_64",
+			"subArchitectures": [
+				"SCMP_ARCH_X86",
+				"SCMP_ARCH_X32"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_AARCH64",
+			"subArchitectures": [
+				"SCMP_ARCH_ARM"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_MIPS64",
+			"subArchitectures": [
+				"SCMP_ARCH_MIPS",
+				"SCMP_ARCH_MIPS64N32"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_MIPS64N32",
+			"subArchitectures": [
+				"SCMP_ARCH_MIPS",
+				"SCMP_ARCH_MIPS64"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_MIPSEL64",
+			"subArchitectures": [
+				"SCMP_ARCH_MIPSEL",
+				"SCMP_ARCH_MIPSEL64N32"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_MIPSEL64N32",
+			"subArchitectures": [
+				"SCMP_ARCH_MIPSEL",
+				"SCMP_ARCH_MIPSEL64"
+			]
+		},
+		{
+			"architecture": "SCMP_ARCH_S390X",
+			"subArchitectures": [
+				"SCMP_ARCH_S390"
+			]
+		}
+	],
+	"syscalls": [
+		{
+			"names": [
+				"accept",
+				"accept4",
+				"access",
+				"adjtimex",
+				"alarm",
+				"bind",
+				"brk",
+				"capget",
+				"capset",
+				"chdir",
+				"chmod",
+				"chown",
+				"chown32",
+				"clock_getres",
+				"clock_gettime",
+				"clock_nanosleep",
+				"close",
+				"connect",
+				"copy_file_range",
+				"creat",
+				"dup",
+				"dup2",
+				"dup3",
+				"epoll_create",
+				"epoll_create1",
+				"epoll_ctl",
+				"epoll_ctl_old",
+				"epoll_pwait",
+				"epoll_wait",
+				"epoll_wait_old",
+				"eventfd",
+				"eventfd2",
+				"execve",
+				"execveat",
+				"exit",
+				"exit_group",
+				"faccessat",
+				"fadvise64",
+				"fadvise64_64",
+				"fallocate",
+				"fanotify_mark",
+				"fchdir",
+				"fchmod",
+				"fchmodat",
+				"fchown",
+				"fchown32",
+				"fchownat",
+				"fcntl",
+				"fcntl64",
+				"fdatasync",
+				"fgetxattr",
+				"flistxattr",
+				"flock",
+				"fork",
+				"fremovexattr",
+				"fsetxattr",
+				"fstat",
+				"fstat64",
+				"fstatat64",
+				"fstatfs",
+				"fstatfs64",
+				"fsync",
+				"ftruncate",
+				"ftruncate64",
+				"futex",
+				"futimesat",
+				"getcpu",
+				"getcwd",
+				"getdents",
+				"getdents64",
+				"getegid",
+				"getegid32",
+				"geteuid",
+				"geteuid32",
+				"getgid",
+				"getgid32",
+				"getgroups",
+				"getgroups32",
+				"getitimer",
+				"getpeername",
+				"getpgid",
+				"getpgrp",
+				"getpid",
+				"getppid",
+				"getpriority",
+				"getrandom",
+				"getresgid",
+				"getresgid32",
+				"getresuid",
+				"getresuid32",
+				"getrlimit",
+				"get_robust_list",
+				"getrusage",
+				"getsid",
+				"getsockname",
+				"getsockopt",
+				"get_thread_area",
+				"gettid",
+				"gettimeofday",
+				"getuid",
+				"getuid32",
+				"getxattr",
+				"inotify_add_watch",
+				"inotify_init",
+				"inotify_init1",
+				"inotify_rm_watch",
+				"io_cancel",
+				"ioctl",
+				"io_destroy",
+				"io_getevents",
+				"ioprio_get",
+				"ioprio_set",
+				"io_setup",
+				"io_submit",
+				"ipc",
+				"kill",
+				"lchown",
+				"lchown32",
+				"lgetxattr",
+				"link",
+				"linkat",
+				"listen",
+				"listxattr",
+				"llistxattr",
+				"_llseek",
+				"lremovexattr",
+				"lseek",
+				"lsetxattr",
+				"lstat",
+				"lstat64",
+				"madvise",
+				"memfd_create",
+				"mincore",
+				"mkdir",
+				"mkdirat",
+				"mknod",
+				"mknodat",
+				"mlock",
+				"mlock2",
+				"mlockall",
+				"mmap",
+				"mmap2",
+				"mprotect",
+				"mq_getsetattr",
+				"mq_notify",
+				"mq_open",
+				"mq_timedreceive",
+				"mq_timedsend",
+				"mq_unlink",
+				"mremap",
+				"msgctl",
+				"msgget",
+				"msgrcv",
+				"msgsnd",
+				"msync",
+				"munlock",
+				"munlockall",
+				"munmap",
+				"nanosleep",
+				"newfstatat",
+				"_newselect",
+				"open",
+				"openat",
+				"pause",
+				"pipe",
+				"pipe2",
+				"poll",
+				"ppoll",
+				"prctl",
+				"pread64",
+				"preadv",
+				"preadv2",
+				"prlimit64",
+				"pselect6",
+				"pwrite64",
+				"pwritev",
+				"pwritev2",
+				"read",
+				"readahead",
+				"readlink",
+				"readlinkat",
+				"readv",
+				"recv",
+				"recvfrom",
+				"recvmmsg",
+				"recvmsg",
+				"remap_file_pages",
+				"removexattr",
+				"rename",
+				"renameat",
+				"renameat2",
+				"restart_syscall",
+				"rmdir",
+				"rt_sigaction",
+				"rt_sigpending",
+				"rt_sigprocmask",
+				"rt_sigqueueinfo",
+				"rt_sigreturn",
+				"rt_sigsuspend",
+				"rt_sigtimedwait",
+				"rt_tgsigqueueinfo",
+				"sched_getaffinity",
+				"sched_getattr",
+				"sched_getparam",
+				"sched_get_priority_max",
+				"sched_get_priority_min",
+				"sched_getscheduler",
+				"sched_rr_get_interval",
+				"sched_setaffinity",
+				"sched_setattr",
+				"sched_setparam",
+				"sched_setscheduler",
+				"sched_yield",
+				"seccomp",
+				"select",
+				"semctl",
+				"semget",
+				"semop",
+				"semtimedop",
+				"send",
+				"sendfile",
+				"sendfile64",
+				"sendmmsg",
+				"sendmsg",
+				"sendto",
+				"setfsgid",
+				"setfsgid32",
+				"setfsuid",
+				"setfsuid32",
+				"setgid",
+				"setgid32",
+				"setgroups",
+				"setgroups32",
+				"setitimer",
+				"setpgid",
+				"setpriority",
+				"setregid",
+				"setregid32",
+				"setresgid",
+				"setresgid32",
+				"setresuid",
+				"setresuid32",
+				"setreuid",
+				"setreuid32",
+				"setrlimit",
+				"set_robust_list",
+				"setsid",
+				"setsockopt",
+				"set_thread_area",
+				"set_tid_address",
+				"setuid",
+				"setuid32",
+				"setxattr",
+				"shmat",
+				"shmctl",
+				"shmdt",
+				"shmget",
+				"shutdown",
+				"sigaltstack",
+				"signalfd",
+				"signalfd4",
+				"sigreturn",
+				"socket",
+				"socketcall",
+				"socketpair",
+				"splice",
+				"stat",
+				"stat64",
+				"statfs",
+				"statfs64",
+				"statx",
+				"symlink",
+				"symlinkat",
+				"sync",
+				"sync_file_range",
+				"syncfs",
+				"sysinfo",
+				"syslog",
+				"tee",
+				"tgkill",
+				"time",
+				"timer_create",
+				"timer_delete",
+				"timerfd_create",
+				"timerfd_gettime",
+				"timerfd_settime",
+				"timer_getoverrun",
+				"timer_gettime",
+				"timer_settime",
+				"times",
+				"tkill",
+				"truncate",
+				"truncate64",
+				"ugetrlimit",
+				"umask",
+				"uname",
+				"unlink",
+				"unlinkat",
+				"utime",
+				"utimensat",
+				"utimes",
+				"vfork",
+				"vmsplice",
+				"wait4",
+				"waitid",
+				"waitpid",
+				"write",
+				"writev",
+				"mount",
+				"umount2",
+				"reboot",
+				"name_to_handle_at",
+				"unshare"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"personality"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 0,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"personality"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 8,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"personality"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 131072,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"personality"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 131080,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"personality"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 4294967295,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"sync_file_range2"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"arches": [
+					"ppc64le"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"arm_fadvise64_64",
+				"arm_sync_file_range",
+				"sync_file_range2",
+				"breakpoint",
+				"cacheflush",
+				"set_tls"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"arches": [
+					"arm",
+					"arm64"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"arch_prctl"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"arches": [
+					"amd64",
+					"x32"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"modify_ldt"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"arches": [
+					"amd64",
+					"x32",
+					"x86"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"s390_pci_mmio_read",
+				"s390_pci_mmio_write",
+				"s390_runtime_instr"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"arches": [
+					"s390",
+					"s390x"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"open_by_handle_at"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_DAC_READ_SEARCH"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"bpf",
+				"clone",
+				"fanotify_init",
+				"lookup_dcookie",
+				"mount",
+				"name_to_handle_at",
+				"perf_event_open",
+				"quotactl",
+				"setdomainname",
+				"sethostname",
+				"setns",
+				"umount",
+				"umount2",
+				"unshare"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_ADMIN"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"clone"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 0,
+					"value": 2080505856,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_MASKED_EQ"
+				}
+			],
+			"comment": "",
+			"includes": {},
+			"excludes": {
+				"caps": [
+					"CAP_SYS_ADMIN"
+				],
+				"arches": [
+					"s390",
+					"s390x"
+				]
+			}
+		},
+		{
+			"names": [
+				"clone"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [
+				{
+					"index": 1,
+					"value": 2080505856,
+					"valueTwo": 0,
+					"op": "SCMP_CMP_MASKED_EQ"
+				}
+			],
+			"comment": "s390 parameter ordering for clone is different",
+			"includes": {
+				"arches": [
+					"s390",
+					"s390x"
+				]
+			},
+			"excludes": {
+				"caps": [
+					"CAP_SYS_ADMIN"
+				]
+			}
+		},
+		{
+			"names": [
+				"reboot"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_BOOT"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"chroot"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_CHROOT"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"delete_module",
+				"init_module",
+				"finit_module",
+				"query_module"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_MODULE"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"get_mempolicy",
+				"mbind",
+				"name_to_handle_at",
+				"set_mempolicy"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_NICE"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"acct"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_PACCT"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"kcmp",
+				"process_vm_readv",
+				"process_vm_writev",
+				"ptrace"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_PTRACE"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"iopl",
+				"ioperm"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_RAWIO"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"settimeofday",
+				"stime",
+				"clock_settime"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_TIME"
+				]
+			},
+			"excludes": {}
+		},
+		{
+			"names": [
+				"vhangup"
+			],
+			"action": "SCMP_ACT_ALLOW",
+			"args": [],
+			"comment": "",
+			"includes": {
+				"caps": [
+					"CAP_SYS_TTY_CONFIG"
+				]
+			},
+			"excludes": {}
+		}
+	]
+}
diff --git a/vendor/github.com/seccomp/libseccomp-golang/CHANGELOG b/vendor/github.com/seccomp/libseccomp-golang/CHANGELOG
index 823aeb7f8..a01d9a722 100644
--- a/vendor/github.com/seccomp/libseccomp-golang/CHANGELOG
+++ b/vendor/github.com/seccomp/libseccomp-golang/CHANGELOG
@@ -2,5 +2,16 @@ libseccomp-golang: Releases
 ===============================================================================
 https://github.com/seccomp/libseccomp-golang
 
+* Version 0.9.1 - May 21, 2019
+- Minimum supported version of libseccomp bumped to v2.2.0
+- Use Libseccomp's `seccomp_version` API to retrieve library version
+- Unconditionally set TSync attribute for filters, due to Go's heavily threaded nature
+- Fix CVE-2017-18367 - Multiple syscall arguments were incorrectly combined with logical-OR, instead of logical-AND
+- Fix a failure to build on Debian-based distributions due to CGo code
+- Fix unit test failures on 32-bit architectures
+- Improve several errors to be more verbose about their causes
+- Add support for SCMP_ACT_LOG (with libseccomp versions 2.4.x and higher), permitting syscalls but logging their execution
+- Add support for SCMP_FLTATR_CTL_LOG (with libseccomp versions 2.4.x and higher), logging not-allowed actions when they are denied
+
 * Version 0.9.0 - January 5, 2017
 - Initial tagged release
diff --git a/vendor/github.com/seccomp/libseccomp-golang/seccomp.go b/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
index 53bcb024d..a3cc53822 100644
--- a/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
+++ b/vendor/github.com/seccomp/libseccomp-golang/seccomp.go
@@ -43,7 +43,7 @@ func (e VersionError) Error() string {
 	if e.minimum != "" {
 		format += e.minimum + ": "
 	} else {
-		format += "2.1.0: "
+		format += "2.2.0: "
 	}
 	format += "detected %d.%d.%d"
 	return fmt.Sprintf(format, verMajor, verMinor, verMicro)
@@ -76,8 +76,8 @@ type ScmpSyscall int32
 
 const (
 	// Valid architectures recognized by libseccomp
-	// ARM64 and all MIPS architectures are unsupported by versions of the
-	// library before v2.2 and will return errors if used
+	// PowerPC and S390(x) architectures are unavailable below library version
+	// v2.3.0 and will returns errors if used with incompatible libraries
 
 	// ArchInvalid is a placeholder to ensure uninitialized ScmpArch
 	// variables are invalid
@@ -137,6 +137,10 @@ const (
 	ActTrace ScmpAction = iota
 	// ActAllow permits the syscall to continue execution
 	ActAllow ScmpAction = iota
+	// ActLog permits the syscall to continue execution after logging it.
+	// This action is only usable when libseccomp API level 3 or higher is
+	// supported.
+	ActLog ScmpAction = iota
 )
 
 const (
@@ -211,7 +215,7 @@ func GetArchFromString(arch string) (ScmpArch, error) {
 	case "s390x":
 		return ArchS390X, nil
 	default:
-		return ArchInvalid, fmt.Errorf("cannot convert unrecognized string %s", arch)
+		return ArchInvalid, fmt.Errorf("cannot convert unrecognized string %q", arch)
 	}
 }
 
@@ -255,7 +259,7 @@ func (a ScmpArch) String() string {
 	case ArchInvalid:
 		return "Invalid architecture"
 	default:
-		return "Unknown architecture"
+		return fmt.Sprintf("Unknown architecture %#x", uint(a))
 	}
 }
 
@@ -279,7 +283,7 @@ func (a ScmpCompareOp) String() string {
 	case CompareInvalid:
 		return "Invalid comparison operator"
 	default:
-		return "Unrecognized comparison operator"
+		return fmt.Sprintf("Unrecognized comparison operator %#x", uint(a))
 	}
 }
 
@@ -295,10 +299,12 @@ func (a ScmpAction) String() string {
 	case ActTrace:
 		return fmt.Sprintf("Action: Notify tracing processes with code %d",
 			(a >> 16))
+	case ActLog:
+		return "Action: Log system call"
 	case ActAllow:
 		return "Action: Allow system call"
 	default:
-		return "Unrecognized Action"
+		return fmt.Sprintf("Unrecognized Action %#x", uint(a))
 	}
 }
 
@@ -324,10 +330,29 @@ func (a ScmpAction) GetReturnCode() int16 {
 // GetLibraryVersion returns the version of the library the bindings are built
 // against.
 // The version is formatted as follows: Major.Minor.Micro
-func GetLibraryVersion() (major, minor, micro int) {
+func GetLibraryVersion() (major, minor, micro uint) {
 	return verMajor, verMinor, verMicro
 }
 
+// GetApi returns the API level supported by the system.
+// Returns a positive int containing the API level, or 0 with an error if the
+// API level could not be detected due to the library being older than v2.4.0.
+// See the seccomp_api_get(3) man page for details on available API levels:
+// https://github.com/seccomp/libseccomp/blob/master/doc/man/man3/seccomp_api_get.3
+func GetApi() (uint, error) {
+	return getApi()
+}
+
+// SetApi forcibly sets the API level. General use of this function is strongly
+// discouraged.
+// Returns an error if the API level could not be set. An error is always
+// returned if the library is older than v2.4.0
+// See the seccomp_api_get(3) man page for details on available API levels:
+// https://github.com/seccomp/libseccomp/blob/master/doc/man/man3/seccomp_api_get.3
+func SetApi(api uint) error {
+	return setApi(api)
+}
+
 // Syscall functions
 
 // GetName retrieves the name of a syscall from its number.
@@ -350,7 +375,7 @@ func (s ScmpSyscall) GetNameByArch(arch ScmpArch) (string, error) {
 
 	cString := C.seccomp_syscall_resolve_num_arch(arch.toNative(), C.int(s))
 	if cString == nil {
-		return "", fmt.Errorf("could not resolve syscall name")
+		return "", fmt.Errorf("could not resolve syscall name for %#x", int32(s))
 	}
 	defer C.free(unsafe.Pointer(cString))
 
@@ -373,7 +398,7 @@ func GetSyscallFromName(name string) (ScmpSyscall, error) {
 
 	result := C.seccomp_syscall_resolve_name(cString)
 	if result == scmpError {
-		return 0, fmt.Errorf("could not resolve name to syscall")
+		return 0, fmt.Errorf("could not resolve name to syscall: %q", name)
 	}
 
 	return ScmpSyscall(result), nil
@@ -397,7 +422,7 @@ func GetSyscallFromNameByArch(name string, arch ScmpArch) (ScmpSyscall, error) {
 
 	result := C.seccomp_syscall_resolve_name_arch(arch.toNative(), cString)
 	if result == scmpError {
-		return 0, fmt.Errorf("could not resolve name to syscall")
+		return 0, fmt.Errorf("could not resolve name to syscall: %q on %v", name, arch)
 	}
 
 	return ScmpSyscall(result), nil
@@ -426,9 +451,9 @@ func MakeCondition(arg uint, comparison ScmpCompareOp, values ...uint64) (ScmpCo
 	if comparison == CompareInvalid {
 		return condStruct, fmt.Errorf("invalid comparison operator")
 	} else if arg > 5 {
-		return condStruct, fmt.Errorf("syscalls only have up to 6 arguments")
+		return condStruct, fmt.Errorf("syscalls only have up to 6 arguments (%d given)", arg)
 	} else if len(values) > 2 {
-		return condStruct, fmt.Errorf("conditions can have at most 2 arguments")
+		return condStruct, fmt.Errorf("conditions can have at most 2 arguments (%d given)", len(values))
 	} else if len(values) == 0 {
 		return condStruct, fmt.Errorf("must provide at least one value to compare against")
 	}
@@ -494,6 +519,13 @@ func NewFilter(defaultAction ScmpAction) (*ScmpFilter, error) {
 	filter.valid = true
 	runtime.SetFinalizer(filter, filterFinalizer)
 
+	// Enable TSync so all goroutines will receive the same rules
+	// If the kernel does not support TSYNC, allow us to continue without error
+	if err := filter.setFilterAttr(filterAttrTsync, 0x1); err != nil && err != syscall.ENOTSUP {
+		filter.Release()
+		return nil, fmt.Errorf("could not create filter - error setting tsync bit: %v", err)
+	}
+
 	return filter, nil
 }
 
@@ -550,7 +582,7 @@ func (f *ScmpFilter) Release() {
 // The source filter src will be released as part of the process, and will no
 // longer be usable or valid after this call.
 // To be merged, filters must NOT share any architectures, and all their
-// attributes (Default Action, Bad Arch Action, No New Privs and TSync bools)
+// attributes (Default Action, Bad Arch Action, and No New Privs bools)
 // must match.
 // The filter src will be merged into the filter this is called on.
 // The architectures of the src filter not present in the destination, and all
@@ -723,24 +755,24 @@ func (f *ScmpFilter) GetNoNewPrivsBit() (bool, error) {
 	return true, nil
 }
 
-// GetTsyncBit returns whether Thread Synchronization will be enabled on the
-// filter being loaded, or an error if an issue was encountered retrieving the
-// value.
-// Thread Sync ensures that all members of the thread group of the calling
-// process will share the same Seccomp filter set.
-// Tsync is a fairly recent addition to the Linux kernel and older kernels
-// lack support. If the running kernel does not support Tsync and it is
-// requested in a filter, Libseccomp will not enable TSync support and will
-// proceed as normal.
-// This function is unavailable before v2.2 of libseccomp and will return an
-// error.
-func (f *ScmpFilter) GetTsyncBit() (bool, error) {
-	tSync, err := f.getFilterAttr(filterAttrTsync)
+// GetLogBit returns the current state the Log bit will be set to on the filter
+// being loaded, or an error if an issue was encountered retrieving the value.
+// The Log bit tells the kernel that all actions taken by the filter, with the
+// exception of ActAllow, should be logged.
+// The Log bit is only usable when libseccomp API level 3 or higher is
+// supported.
+func (f *ScmpFilter) GetLogBit() (bool, error) {
+	log, err := f.getFilterAttr(filterAttrLog)
 	if err != nil {
+		api, apiErr := getApi()
+		if (apiErr != nil && api == 0) || (apiErr == nil && api < 3) {
+			return false, fmt.Errorf("getting the log bit is only supported in libseccomp 2.4.0 and newer with API level 3 or higher")
+		}
+
 		return false, err
 	}
 
-	if tSync == 0 {
+	if log == 0 {
 		return false, nil
 	}
 
@@ -773,25 +805,26 @@ func (f *ScmpFilter) SetNoNewPrivsBit(state bool) error {
 	return f.setFilterAttr(filterAttrNNP, toSet)
 }
 
-// SetTsync sets whether Thread Synchronization will be enabled on the filter
-// being loaded. Returns an error if setting Tsync failed, or the filter is
-// invalid.
-// Thread Sync ensures that all members of the thread group of the calling
-// process will share the same Seccomp filter set.
-// Tsync is a fairly recent addition to the Linux kernel and older kernels
-// lack support. If the running kernel does not support Tsync and it is
-// requested in a filter, Libseccomp will not enable TSync support and will
-// proceed as normal.
-// This function is unavailable before v2.2 of libseccomp and will return an
-// error.
-func (f *ScmpFilter) SetTsync(enable bool) error {
+// SetLogBit sets the state of the Log bit, which will be applied on filter
+// load, or an error if an issue was encountered setting the value.
+// The Log bit is only usable when libseccomp API level 3 or higher is
+// supported.
+func (f *ScmpFilter) SetLogBit(state bool) error {
 	var toSet C.uint32_t = 0x0
 
-	if enable {
+	if state {
 		toSet = 0x1
 	}
 
-	return f.setFilterAttr(filterAttrTsync, toSet)
+	err := f.setFilterAttr(filterAttrLog, toSet)
+	if err != nil {
+		api, apiErr := getApi()
+		if (apiErr != nil && api == 0) || (apiErr == nil && api < 3) {
+			return fmt.Errorf("setting the log bit is only supported in libseccomp 2.4.0 and newer with API level 3 or higher")
+		}
+	}
+
+	return err
 }
 
 // SetSyscallPriority sets a syscall's priority.
diff --git a/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go b/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
index b0caac91b..4e36b27ae 100644
--- a/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
+++ b/vendor/github.com/seccomp/libseccomp-golang/seccomp_internal.go
@@ -16,47 +16,20 @@ import (
 
 // #cgo pkg-config: libseccomp
 /*
+#include <errno.h>
 #include <stdlib.h>
 #include <seccomp.h>
 
 #if SCMP_VER_MAJOR < 2
-#error Minimum supported version of Libseccomp is v2.1.0
-#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 1
-#error Minimum supported version of Libseccomp is v2.1.0
+#error Minimum supported version of Libseccomp is v2.2.0
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 2
+#error Minimum supported version of Libseccomp is v2.2.0
 #endif
 
 #define ARCH_BAD ~0
 
 const uint32_t C_ARCH_BAD = ARCH_BAD;
 
-#ifndef SCMP_ARCH_AARCH64
-#define SCMP_ARCH_AARCH64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS
-#define SCMP_ARCH_MIPS ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS64
-#define SCMP_ARCH_MIPS64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPS64N32
-#define SCMP_ARCH_MIPS64N32 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL
-#define SCMP_ARCH_MIPSEL ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL64
-#define SCMP_ARCH_MIPSEL64 ARCH_BAD
-#endif
-
-#ifndef SCMP_ARCH_MIPSEL64N32
-#define SCMP_ARCH_MIPSEL64N32 ARCH_BAD
-#endif
-
 #ifndef SCMP_ARCH_PPC
 #define SCMP_ARCH_PPC ARCH_BAD
 #endif
@@ -95,22 +68,29 @@ const uint32_t C_ARCH_PPC64LE      = SCMP_ARCH_PPC64LE;
 const uint32_t C_ARCH_S390         = SCMP_ARCH_S390;
 const uint32_t C_ARCH_S390X        = SCMP_ARCH_S390X;
 
+#ifndef SCMP_ACT_LOG
+#define SCMP_ACT_LOG 0x7ffc0000U
+#endif
+
 const uint32_t C_ACT_KILL          = SCMP_ACT_KILL;
 const uint32_t C_ACT_TRAP          = SCMP_ACT_TRAP;
 const uint32_t C_ACT_ERRNO         = SCMP_ACT_ERRNO(0);
 const uint32_t C_ACT_TRACE         = SCMP_ACT_TRACE(0);
+const uint32_t C_ACT_LOG           = SCMP_ACT_LOG;
 const uint32_t C_ACT_ALLOW         = SCMP_ACT_ALLOW;
 
-// If TSync is not supported, make sure it doesn't map to a supported filter attribute
-// Don't worry about major version < 2, the minimum version checks should catch that case
-#if SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 2
-#define SCMP_FLTATR_CTL_TSYNC _SCMP_CMP_MIN
+// The libseccomp SCMP_FLTATR_CTL_LOG member of the scmp_filter_attr enum was
+// added in v2.4.0
+#if (SCMP_VER_MAJOR < 2) || \
+    (SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 4)
+#define SCMP_FLTATR_CTL_LOG _SCMP_FLTATR_MIN
 #endif
 
 const uint32_t C_ATTRIBUTE_DEFAULT = (uint32_t)SCMP_FLTATR_ACT_DEFAULT;
 const uint32_t C_ATTRIBUTE_BADARCH = (uint32_t)SCMP_FLTATR_ACT_BADARCH;
 const uint32_t C_ATTRIBUTE_NNP     = (uint32_t)SCMP_FLTATR_CTL_NNP;
 const uint32_t C_ATTRIBUTE_TSYNC   = (uint32_t)SCMP_FLTATR_CTL_TSYNC;
+const uint32_t C_ATTRIBUTE_LOG     = (uint32_t)SCMP_FLTATR_CTL_LOG;
 
 const int      C_CMP_NE            = (int)SCMP_CMP_NE;
 const int      C_CMP_LT            = (int)SCMP_CMP_LT;
@@ -124,25 +104,80 @@ const int      C_VERSION_MAJOR     = SCMP_VER_MAJOR;
 const int      C_VERSION_MINOR     = SCMP_VER_MINOR;
 const int      C_VERSION_MICRO     = SCMP_VER_MICRO;
 
+#if SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR >= 3
+unsigned int get_major_version()
+{
+        return seccomp_version()->major;
+}
+
+unsigned int get_minor_version()
+{
+        return seccomp_version()->minor;
+}
+
+unsigned int get_micro_version()
+{
+        return seccomp_version()->micro;
+}
+#else
+unsigned int get_major_version()
+{
+        return (unsigned int)C_VERSION_MAJOR;
+}
+
+unsigned int get_minor_version()
+{
+        return (unsigned int)C_VERSION_MINOR;
+}
+
+unsigned int get_micro_version()
+{
+        return (unsigned int)C_VERSION_MICRO;
+}
+#endif
+
+// The libseccomp API level functions were added in v2.4.0
+#if (SCMP_VER_MAJOR < 2) || \
+    (SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR < 4)
+const unsigned int seccomp_api_get(void)
+{
+	// libseccomp-golang requires libseccomp v2.2.0, at a minimum, which
+	// supported API level 2. However, the kernel may not support API level
+	// 2 constructs which are the seccomp() system call and the TSYNC
+	// filter flag. Return the "reserved" value of 0 here to indicate that
+	// proper API level support is not available in libseccomp.
+	return 0;
+}
+
+int seccomp_api_set(unsigned int level)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
 typedef struct scmp_arg_cmp* scmp_cast_t;
 
-// Wrapper to create an scmp_arg_cmp struct
-void*
-make_struct_arg_cmp(
-                    unsigned int arg,
-                    int compare,
-                    uint64_t a,
-                    uint64_t b
-                   )
+void* make_arg_cmp_array(unsigned int length)
 {
-	struct scmp_arg_cmp *s = malloc(sizeof(struct scmp_arg_cmp));
+        return calloc(length, sizeof(struct scmp_arg_cmp));
+}
 
-	s->arg = arg;
-	s->op = compare;
-	s->datum_a = a;
-	s->datum_b = b;
+// Wrapper to add an scmp_arg_cmp struct to an existing arg_cmp array
+void add_struct_arg_cmp(
+                        struct scmp_arg_cmp* arr,
+                        unsigned int pos,
+                        unsigned int arg,
+                        int compare,
+                        uint64_t a,
+                        uint64_t b
+                       )
+{
+        arr[pos].arg = arg;
+        arr[pos].op = compare;
+        arr[pos].datum_a = a;
+        arr[pos].datum_b = b;
 
-	return s;
+        return;
 }
 */
 import "C"
@@ -157,6 +192,7 @@ const (
 	filterAttrActBadArch scmpFilterAttr = iota
 	filterAttrNNP        scmpFilterAttr = iota
 	filterAttrTsync      scmpFilterAttr = iota
+	filterAttrLog        scmpFilterAttr = iota
 )
 
 const (
@@ -167,7 +203,7 @@ const (
 	archEnd   ScmpArch = ArchS390X
 	// Comparison boundaries to check for action validity
 	actionStart ScmpAction = ActKill
-	actionEnd   ScmpAction = ActAllow
+	actionEnd   ScmpAction = ActLog
 	// Comparison boundaries to check for comparison operator validity
 	compareOpStart ScmpCompareOp = CompareNotEqual
 	compareOpEnd   ScmpCompareOp = CompareMaskedEqual
@@ -177,28 +213,51 @@ var (
 	// Error thrown on bad filter context
 	errBadFilter = fmt.Errorf("filter is invalid or uninitialized")
 	// Constants representing library major, minor, and micro versions
-	verMajor = int(C.C_VERSION_MAJOR)
-	verMinor = int(C.C_VERSION_MINOR)
-	verMicro = int(C.C_VERSION_MICRO)
+	verMajor = uint(C.get_major_version())
+	verMinor = uint(C.get_minor_version())
+	verMicro = uint(C.get_micro_version())
 )
 
 // Nonexported functions
 
 // Check if library version is greater than or equal to the given one
-func checkVersionAbove(major, minor, micro int) bool {
+func checkVersionAbove(major, minor, micro uint) bool {
 	return (verMajor > major) ||
 		(verMajor == major && verMinor > minor) ||
 		(verMajor == major && verMinor == minor && verMicro >= micro)
 }
 
-// Ensure that the library is supported, i.e. >= 2.1.0.
+// Ensure that the library is supported, i.e. >= 2.2.0.
 func ensureSupportedVersion() error {
-	if !checkVersionAbove(2, 1, 0) {
+	if !checkVersionAbove(2, 2, 0) {
 		return VersionError{}
 	}
 	return nil
 }
 
+// Get the API level
+func getApi() (uint, error) {
+	api := C.seccomp_api_get()
+	if api == 0 {
+		return 0, fmt.Errorf("API level operations are not supported")
+	}
+
+	return uint(api), nil
+}
+
+// Set the API level
+func setApi(api uint) error {
+	if retCode := C.seccomp_api_set(C.uint(api)); retCode != 0 {
+		if syscall.Errno(-1*retCode) == syscall.EOPNOTSUPP {
+			return fmt.Errorf("API level operations are not supported")
+		}
+
+		return fmt.Errorf("could not set API level: %v", retCode)
+	}
+
+	return nil
+}
+
 // Filter helpers
 
 // Filter finalizer - ensure that kernel context for filters is freed
@@ -215,13 +274,6 @@ func (f *ScmpFilter) getFilterAttr(attr scmpFilterAttr) (C.uint32_t, error) {
 		return 0x0, errBadFilter
 	}
 
-	if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
-		return 0x0, VersionError{
-			message: "thread synchronization attribute is not supported",
-			minimum: "2.2.0",
-		}
-	}
-
 	var attribute C.uint32_t
 
 	retCode := C.seccomp_attr_get(f.filterCtx, attr.toNative(), &attribute)
@@ -241,13 +293,6 @@ func (f *ScmpFilter) setFilterAttr(attr scmpFilterAttr, value C.uint32_t) error
 		return errBadFilter
 	}
 
-	if !checkVersionAbove(2, 2, 0) && attr == filterAttrTsync {
-		return VersionError{
-			message: "thread synchronization attribute is not supported",
-			minimum: "2.2.0",
-		}
-	}
-
 	retCode := C.seccomp_attr_set(f.filterCtx, attr.toNative(), value)
 	if retCode != 0 {
 		return syscall.Errno(-1 * retCode)
@@ -259,12 +304,9 @@ func (f *ScmpFilter) setFilterAttr(attr scmpFilterAttr, value C.uint32_t) error
 // DOES NOT LOCK OR CHECK VALIDITY
 // Assumes caller has already done this
 // Wrapper for seccomp_rule_add_... functions
-func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact bool, cond C.scmp_cast_t) error {
-	var length C.uint
-	if cond != nil {
-		length = 1
-	} else {
-		length = 0
+func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact bool, length C.uint, cond C.scmp_cast_t) error {
+	if length != 0 && cond == nil {
+		return fmt.Errorf("null conditions list, but length is nonzero")
 	}
 
 	var retCode C.int
@@ -275,9 +317,11 @@ func (f *ScmpFilter) addRuleWrapper(call ScmpSyscall, action ScmpAction, exact b
 	}
 
 	if syscall.Errno(-1*retCode) == syscall.EFAULT {
-		return fmt.Errorf("unrecognized syscall")
+		return fmt.Errorf("unrecognized syscall %#x", int32(call))
 	} else if syscall.Errno(-1*retCode) == syscall.EPERM {
 		return fmt.Errorf("requested action matches default action of filter")
+	} else if syscall.Errno(-1*retCode) == syscall.EINVAL {
+		return fmt.Errorf("two checks on same syscall argument")
 	} else if retCode != 0 {
 		return syscall.Errno(-1 * retCode)
 	}
@@ -295,7 +339,7 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
 	}
 
 	if len(conds) == 0 {
-		if err := f.addRuleWrapper(call, action, exact, nil); err != nil {
+		if err := f.addRuleWrapper(call, action, exact, 0, nil); err != nil {
 			return err
 		}
 	} else {
@@ -307,13 +351,20 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
 			}
 		}
 
-		for _, cond := range conds {
-			cmpStruct := C.make_struct_arg_cmp(C.uint(cond.Argument), cond.Op.toNative(), C.uint64_t(cond.Operand1), C.uint64_t(cond.Operand2))
-			defer C.free(cmpStruct)
+		argsArr := C.make_arg_cmp_array(C.uint(len(conds)))
+		if argsArr == nil {
+			return fmt.Errorf("error allocating memory for conditions")
+		}
+		defer C.free(argsArr)
+
+		for i, cond := range conds {
+			C.add_struct_arg_cmp(C.scmp_cast_t(argsArr), C.uint(i),
+				C.uint(cond.Argument), cond.Op.toNative(),
+				C.uint64_t(cond.Operand1), C.uint64_t(cond.Operand2))
+		}
 
-			if err := f.addRuleWrapper(call, action, exact, C.scmp_cast_t(cmpStruct)); err != nil {
-				return err
-			}
+		if err := f.addRuleWrapper(call, action, exact, C.uint(len(conds)), C.scmp_cast_t(argsArr)); err != nil {
+			return err
 		}
 	}
 
@@ -325,11 +376,11 @@ func (f *ScmpFilter) addRuleGeneric(call ScmpSyscall, action ScmpAction, exact b
 // Helper - Sanitize Arch token input
 func sanitizeArch(in ScmpArch) error {
 	if in < archStart || in > archEnd {
-		return fmt.Errorf("unrecognized architecture")
+		return fmt.Errorf("unrecognized architecture %#x", uint(in))
 	}
 
 	if in.toNative() == C.C_ARCH_BAD {
-		return fmt.Errorf("architecture is not supported on this version of the library")
+		return fmt.Errorf("architecture %v is not supported on this version of the library", in)
 	}
 
 	return nil
@@ -338,7 +389,7 @@ func sanitizeArch(in ScmpArch) error {
 func sanitizeAction(in ScmpAction) error {
 	inTmp := in & 0x0000FFFF
 	if inTmp < actionStart || inTmp > actionEnd {
-		return fmt.Errorf("unrecognized action")
+		return fmt.Errorf("unrecognized action %#x", uint(inTmp))
 	}
 
 	if inTmp != ActTrace && inTmp != ActErrno && (in&0xFFFF0000) != 0 {
@@ -350,7 +401,7 @@ func sanitizeAction(in ScmpAction) error {
 
 func sanitizeCompareOp(in ScmpCompareOp) error {
 	if in < compareOpStart || in > compareOpEnd {
-		return fmt.Errorf("unrecognized comparison operator")
+		return fmt.Errorf("unrecognized comparison operator %#x", uint(in))
 	}
 
 	return nil
@@ -393,7 +444,7 @@ func archFromNative(a C.uint32_t) (ScmpArch, error) {
 	case C.C_ARCH_S390X:
 		return ArchS390X, nil
 	default:
-		return 0x0, fmt.Errorf("unrecognized architecture")
+		return 0x0, fmt.Errorf("unrecognized architecture %#x", uint32(a))
 	}
 }
 
@@ -472,10 +523,12 @@ func actionFromNative(a C.uint32_t) (ScmpAction, error) {
 		return ActErrno.SetReturnCode(int16(aTmp)), nil
 	case C.C_ACT_TRACE:
 		return ActTrace.SetReturnCode(int16(aTmp)), nil
+	case C.C_ACT_LOG:
+		return ActLog, nil
 	case C.C_ACT_ALLOW:
 		return ActAllow, nil
 	default:
-		return 0x0, fmt.Errorf("unrecognized action")
+		return 0x0, fmt.Errorf("unrecognized action %#x", uint32(a))
 	}
 }
 
@@ -490,6 +543,8 @@ func (a ScmpAction) toNative() C.uint32_t {
 		return C.C_ACT_ERRNO | (C.uint32_t(a) >> 16)
 	case ActTrace:
 		return C.C_ACT_TRACE | (C.uint32_t(a) >> 16)
+	case ActLog:
+		return C.C_ACT_LOG
 	case ActAllow:
 		return C.C_ACT_ALLOW
 	default:
@@ -508,6 +563,8 @@ func (a scmpFilterAttr) toNative() uint32 {
 		return uint32(C.C_ATTRIBUTE_NNP)
 	case filterAttrTsync:
 		return uint32(C.C_ATTRIBUTE_TSYNC)
+	case filterAttrLog:
+		return uint32(C.C_ATTRIBUTE_LOG)
 	default:
 		return 0x0
 	}
diff --git a/vendor/github.com/spf13/cobra/.gitignore b/vendor/github.com/spf13/cobra/.gitignore
index 1b8c7c261..3b053c59e 100644
--- a/vendor/github.com/spf13/cobra/.gitignore
+++ b/vendor/github.com/spf13/cobra/.gitignore
@@ -34,3 +34,5 @@ tags
 *.exe
 
 cobra.test
+
+.idea/*
diff --git a/vendor/github.com/spf13/cobra/.travis.yml b/vendor/github.com/spf13/cobra/.travis.yml
index 5afcb2096..38b85f499 100644
--- a/vendor/github.com/spf13/cobra/.travis.yml
+++ b/vendor/github.com/spf13/cobra/.travis.yml
@@ -1,21 +1,31 @@
 language: go
 
+stages:
+  - diff
+  - test
+
+go:
+  - 1.10.x
+  - 1.11.x
+  - 1.12.x
+  - tip
+
 matrix:
-  include:
-    - go: 1.9.4
-    - go: 1.10.0
-    - go: tip
   allow_failures:
     - go: tip
+  include:
+    - stage: diff
+      go: 1.12.x
+      script: diff -u <(echo -n) <(gofmt -d -s .)
 
 before_install:
   - mkdir -p bin
-  - curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.4.3/shellcheck
+  - curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.6.0/shellcheck
   - chmod +x bin/shellcheck
+  - go get -u github.com/kyoh86/richgo
 script:
-  - PATH=$PATH:$PWD/bin go test -v ./...
+  - PATH=$PATH:$PWD/bin richgo test -v ./...
   - go build
-  - diff -u <(echo -n) <(gofmt -d -s .)
   - if [ -z $NOVET ]; then
-      diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+      diff -u <(echo -n) <(go vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
     fi
diff --git a/vendor/github.com/spf13/cobra/README.md b/vendor/github.com/spf13/cobra/README.md
index 851fcc087..60c5a425b 100644
--- a/vendor/github.com/spf13/cobra/README.md
+++ b/vendor/github.com/spf13/cobra/README.md
@@ -2,25 +2,29 @@
 
 Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
 
-Many of the most widely used Go projects are built using Cobra including:
-
-* [Kubernetes](http://kubernetes.io/)
-* [Hugo](http://gohugo.io)
-* [rkt](https://github.com/coreos/rkt)
-* [etcd](https://github.com/coreos/etcd)
-* [Moby (former Docker)](https://github.com/moby/moby)
-* [Docker (distribution)](https://github.com/docker/distribution)
-* [OpenShift](https://www.openshift.com/)
-* [Delve](https://github.com/derekparker/delve)
-* [GopherJS](http://www.gopherjs.org/)
-* [CockroachDB](http://www.cockroachlabs.com/)
-* [Bleve](http://www.blevesearch.com/)
-* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
-* [GiantSwarm's swarm](https://github.com/giantswarm/cli)
-* [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
-* [rclone](http://rclone.org/)
-* [nehm](https://github.com/bogem/nehm)
-* [Pouch](https://github.com/alibaba/pouch)
+Many of the most widely used Go projects are built using Cobra, such as:
+[Kubernetes](http://kubernetes.io/),
+[Hugo](http://gohugo.io),
+[rkt](https://github.com/coreos/rkt),
+[etcd](https://github.com/coreos/etcd),
+[Moby (former Docker)](https://github.com/moby/moby),
+[Docker (distribution)](https://github.com/docker/distribution),
+[OpenShift](https://www.openshift.com/),
+[Delve](https://github.com/derekparker/delve),
+[GopherJS](http://www.gopherjs.org/),
+[CockroachDB](http://www.cockroachlabs.com/),
+[Bleve](http://www.blevesearch.com/),
+[ProjectAtomic (enterprise)](http://www.projectatomic.io/),
+[Giant Swarm's gsctl](https://github.com/giantswarm/gsctl),
+[Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack),
+[rclone](http://rclone.org/),
+[nehm](https://github.com/bogem/nehm),
+[Pouch](https://github.com/alibaba/pouch),
+[Istio](https://istio.io),
+[Prototool](https://github.com/uber/prototool),
+[mattermost-server](https://github.com/mattermost/mattermost-server),
+[Gardener](https://github.com/gardener/gardenctl),
+etc.
 
 [![Build Status](https://travis-ci.org/spf13/cobra.svg "Travis CI status")](https://travis-ci.org/spf13/cobra)
 [![CircleCI status](https://circleci.com/gh/spf13/cobra.png?circle-token=:circle-token "CircleCI status")](https://circleci.com/gh/spf13/cobra)
@@ -45,6 +49,7 @@ Many of the most widely used Go projects are built using Cobra including:
   * [Suggestions when "unknown command" happens](#suggestions-when-unknown-command-happens)
   * [Generating documentation for your command](#generating-documentation-for-your-command)
   * [Generating bash completions](#generating-bash-completions)
+  * [Generating zsh completions](#generating-zsh-completions)
 - [Contributing](#contributing)
 - [License](#license)
 
@@ -152,9 +157,6 @@ In a Cobra app, typically the main.go file is very bare. It serves one purpose:
 package main
 
 import (
-  "fmt"
-  "os"
-
   "{pathToYourApp}/cmd"
 )
 
@@ -265,9 +267,6 @@ In a Cobra app, typically the main.go file is very bare. It serves, one purpose,
 package main
 
 import (
-  "fmt"
-  "os"
-
   "{pathToYourApp}/cmd"
 )
 
@@ -339,7 +338,7 @@ rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose out
 A flag can also be assigned locally which will only apply to that specific command.
 
 ```go
-rootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
+localCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
 ```
 
 ### Local Flag on Parent Commands
@@ -395,6 +394,7 @@ The following validators are built in:
 - `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
 - `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
 - `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
+- `ExactValidArgs(int)` - the command will report an error if there are not exactly N positional args OR if there are any positional args that are not in the `ValidArgs` field of `Command`
 - `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
 
 An example of setting the custom validator:
@@ -404,7 +404,7 @@ var cmd = &cobra.Command{
   Short: "hello",
   Args: func(cmd *cobra.Command, args []string) error {
     if len(args) < 1 {
-      return errors.New("requires at least one arg")
+      return errors.New("requires a color argument")
     }
     if myapp.IsValidColor(args[0]) {
       return nil
@@ -464,7 +464,7 @@ Echo works a lot like print, except it has a child command.`,
   }
 
   var cmdTimes = &cobra.Command{
-    Use:   "times [# times] [string to echo]",
+    Use:   "times [string to echo]",
     Short: "Echo anything to the screen more times",
     Long: `echo things multiple times back to the user by providing
 a count and a string.`,
@@ -721,6 +721,11 @@ Cobra can generate documentation based on subcommands, flags, etc. in the follow
 
 Cobra can generate a bash-completion file. If you add more information to your command, these completions can be amazingly powerful and flexible.  Read more about it in [Bash Completions](bash_completions.md).
 
+## Generating zsh completions
+
+Cobra can generate zsh-completion file. Read more about it in
+[Zsh Completions](zsh_completions.md).
+
 # Contributing
 
 1. Fork it
diff --git a/vendor/github.com/spf13/cobra/args.go b/vendor/github.com/spf13/cobra/args.go
index a5d8a9273..c4d820b85 100644
--- a/vendor/github.com/spf13/cobra/args.go
+++ b/vendor/github.com/spf13/cobra/args.go
@@ -78,6 +78,18 @@ func ExactArgs(n int) PositionalArgs {
 	}
 }
 
+// ExactValidArgs returns an error if
+// there are not exactly N positional args OR
+// there are any positional args that are not in the `ValidArgs` field of `Command`
+func ExactValidArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if err := ExactArgs(n)(cmd, args); err != nil {
+			return err
+		}
+		return OnlyValidArgs(cmd, args)
+	}
+}
+
 // RangeArgs returns an error if the number of args is not within the expected range.
 func RangeArgs(min int, max int) PositionalArgs {
 	return func(cmd *Command, args []string) error {
diff --git a/vendor/github.com/spf13/cobra/bash_completions.go b/vendor/github.com/spf13/cobra/bash_completions.go
index 8fa8f486f..57bb8e1b3 100644
--- a/vendor/github.com/spf13/cobra/bash_completions.go
+++ b/vendor/github.com/spf13/cobra/bash_completions.go
@@ -129,7 +129,13 @@ __%[1]s_handle_reply()
     fi
 
     if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
-        declare -F __custom_func >/dev/null && __custom_func
+		if declare -F __%[1]s_custom_func >/dev/null; then
+			# try command name qualified custom func
+			__%[1]s_custom_func
+		else
+			# otherwise fall back to unqualified for compatibility
+			declare -F __custom_func >/dev/null && __custom_func
+		fi
     fi
 
     # available in bash-completion >= 2, not always present on macOS
@@ -193,7 +199,8 @@ __%[1]s_handle_flag()
     fi
 
     # skip the argument to a two word flag
-    if __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
+    if [[ ${words[c]} != *"="* ]] && __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
+			  __%[1]s_debug "${FUNCNAME[0]}: found a flag ${words[c]}, skip the next argument"
         c=$((c+1))
         # if we are looking for a flags value, don't show commands
         if [[ $c -eq $cword ]]; then
@@ -373,6 +380,10 @@ func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
 	}
 	format += "\")\n"
 	buf.WriteString(fmt.Sprintf(format, name))
+	if len(flag.NoOptDefVal) == 0 {
+		format = "    two_word_flags+=(\"--%s\")\n"
+		buf.WriteString(fmt.Sprintf(format, name))
+	}
 	writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
 }
 
@@ -534,51 +545,3 @@ func (c *Command) GenBashCompletionFile(filename string) error {
 
 	return c.GenBashCompletion(outFile)
 }
-
-// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
-// and causes your command to report an error if invoked without the flag.
-func (c *Command) MarkFlagRequired(name string) error {
-	return MarkFlagRequired(c.Flags(), name)
-}
-
-// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
-// and causes your command to report an error if invoked without the flag.
-func (c *Command) MarkPersistentFlagRequired(name string) error {
-	return MarkFlagRequired(c.PersistentFlags(), name)
-}
-
-// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
-// and causes your command to report an error if invoked without the flag.
-func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
-	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
-}
-
-// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
-// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
-func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
-	return MarkFlagFilename(c.Flags(), name, extensions...)
-}
-
-// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
-// Generated bash autocompletion will call the bash function f for the flag.
-func (c *Command) MarkFlagCustom(name string, f string) error {
-	return MarkFlagCustom(c.Flags(), name, f)
-}
-
-// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
-// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
-func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
-	return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
-}
-
-// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
-// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
-func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
-	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
-}
-
-// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
-// Generated bash autocompletion will call the bash function f for the flag.
-func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
-	return flags.SetAnnotation(name, BashCompCustom, []string{f})
-}
diff --git a/vendor/github.com/spf13/cobra/bash_completions.md b/vendor/github.com/spf13/cobra/bash_completions.md
index e79d4769d..4ac61ee13 100644
--- a/vendor/github.com/spf13/cobra/bash_completions.md
+++ b/vendor/github.com/spf13/cobra/bash_completions.md
@@ -1,5 +1,40 @@
 # Generating Bash Completions For Your Own cobra.Command
 
+If you are using the generator you can create a completion command by running
+
+```bash
+cobra add completion
+```
+
+Update the help text show how to install the bash_completion Linux show here [Kubectl docs show mac options](https://kubernetes.io/docs/tasks/tools/install-kubectl/#enabling-shell-autocompletion)
+
+Writing the shell script to stdout allows the most flexible use.
+
+```go
+// completionCmd represents the completion command
+var completionCmd = &cobra.Command{
+	Use:   "completion",
+	Short: "Generates bash completion scripts",
+	Long: `To load completion run
+
+. <(bitbucket completion)
+
+To configure your bash shell to load completions for each session add to your bashrc
+
+# ~/.bashrc or ~/.profile
+. <(bitbucket completion)
+`,
+	Run: func(cmd *cobra.Command, args []string) {
+		rootCmd.GenBashCompletion(os.Stdout);
+	},
+}
+```
+
+**Note:** The cobra generator may include messages printed to stdout for example if the config file is loaded, this will break the auto complete script
+
+
+## Example from kubectl
+
 Generating bash completions from a cobra command is incredibly easy. An actual program which does so for the kubernetes kubectl binary is as follows:
 
 ```go
@@ -47,7 +82,7 @@ __kubectl_get_resource()
     fi
 }
 
-__custom_func() {
+__kubectl_custom_func() {
     case ${last_command} in
         kubectl_get | kubectl_describe | kubectl_delete | kubectl_stop)
             __kubectl_get_resource
@@ -74,7 +109,7 @@ Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
 }
 ```
 
-The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__custom_func()` to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`.  `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`.  So it will call `__kubectl_parse_get pod`.  `__kubectl_parse_get` will actually call out to kubernetes and get any pods.  It will then set `COMPREPLY` to valid pods!
+The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__kubectl_custom_func()` (`__<command-use>_custom_func()`) to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__kubectl_customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__kubectl_custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`.  `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`.  So it will call `__kubectl_parse_get pod`.  `__kubectl_parse_get` will actually call out to kubernetes and get any pods.  It will then set `COMPREPLY` to valid pods!
 
 ## Have the completions code complete your 'nouns'
 
diff --git a/vendor/github.com/spf13/cobra/cobra.go b/vendor/github.com/spf13/cobra/cobra.go
index 7010fd15b..6505c070b 100644
--- a/vendor/github.com/spf13/cobra/cobra.go
+++ b/vendor/github.com/spf13/cobra/cobra.go
@@ -23,6 +23,7 @@ import (
 	"strconv"
 	"strings"
 	"text/template"
+	"time"
 	"unicode"
 )
 
@@ -56,6 +57,12 @@ var MousetrapHelpText string = `This is a command line tool.
 You need to open cmd.exe and run it from there.
 `
 
+// MousetrapDisplayDuration controls how long the MousetrapHelpText message is displayed on Windows
+// if the CLI is started from explorer.exe. Set to 0 to wait for the return key to be pressed.
+// To disable the mousetrap, just set MousetrapHelpText to blank string ("").
+// Works only on Microsoft Windows.
+var MousetrapDisplayDuration time.Duration = 5 * time.Second
+
 // AddTemplateFunc adds a template function that's available to Usage and Help
 // template generation.
 func AddTemplateFunc(name string, tmplFunc interface{}) {
diff --git a/vendor/github.com/spf13/cobra/command.go b/vendor/github.com/spf13/cobra/command.go
index 34d1bf367..c7e898303 100644
--- a/vendor/github.com/spf13/cobra/command.go
+++ b/vendor/github.com/spf13/cobra/command.go
@@ -177,8 +177,6 @@ type Command struct {
 	// that we can use on every pflag set and children commands
 	globNormFunc func(f *flag.FlagSet, name string) flag.NormalizedName
 
-	// output is an output writer defined by user.
-	output io.Writer
 	// usageFunc is usage func defined by user.
 	usageFunc func(*Command) error
 	// usageTemplate is usage template defined by user.
@@ -195,6 +193,13 @@ type Command struct {
 	helpCommand *Command
 	// versionTemplate is the version template defined by user.
 	versionTemplate string
+
+	// inReader is a reader defined by the user that replaces stdin
+	inReader io.Reader
+	// outWriter is a writer defined by the user that replaces stdout
+	outWriter io.Writer
+	// errWriter is a writer defined by the user that replaces stderr
+	errWriter io.Writer
 }
 
 // SetArgs sets arguments for the command. It is set to os.Args[1:] by default, if desired, can be overridden
@@ -205,8 +210,28 @@ func (c *Command) SetArgs(a []string) {
 
 // SetOutput sets the destination for usage and error messages.
 // If output is nil, os.Stderr is used.
+// Deprecated: Use SetOut and/or SetErr instead
 func (c *Command) SetOutput(output io.Writer) {
-	c.output = output
+	c.outWriter = output
+	c.errWriter = output
+}
+
+// SetOut sets the destination for usage messages.
+// If newOut is nil, os.Stdout is used.
+func (c *Command) SetOut(newOut io.Writer) {
+	c.outWriter = newOut
+}
+
+// SetErr sets the destination for error messages.
+// If newErr is nil, os.Stderr is used.
+func (c *Command) SetErr(newErr io.Writer) {
+	c.errWriter = newErr
+}
+
+// SetOut sets the source for input data
+// If newIn is nil, os.Stdin is used.
+func (c *Command) SetIn(newIn io.Reader) {
+	c.inReader = newIn
 }
 
 // SetUsageFunc sets usage function. Usage can be defined by application.
@@ -267,9 +292,19 @@ func (c *Command) OutOrStderr() io.Writer {
 	return c.getOut(os.Stderr)
 }
 
+// ErrOrStderr returns output to stderr
+func (c *Command) ErrOrStderr() io.Writer {
+	return c.getErr(os.Stderr)
+}
+
+// ErrOrStderr returns output to stderr
+func (c *Command) InOrStdin() io.Reader {
+	return c.getIn(os.Stdin)
+}
+
 func (c *Command) getOut(def io.Writer) io.Writer {
-	if c.output != nil {
-		return c.output
+	if c.outWriter != nil {
+		return c.outWriter
 	}
 	if c.HasParent() {
 		return c.parent.getOut(def)
@@ -277,6 +312,26 @@ func (c *Command) getOut(def io.Writer) io.Writer {
 	return def
 }
 
+func (c *Command) getErr(def io.Writer) io.Writer {
+	if c.errWriter != nil {
+		return c.errWriter
+	}
+	if c.HasParent() {
+		return c.parent.getErr(def)
+	}
+	return def
+}
+
+func (c *Command) getIn(def io.Reader) io.Reader {
+	if c.inReader != nil {
+		return c.inReader
+	}
+	if c.HasParent() {
+		return c.parent.getIn(def)
+	}
+	return def
+}
+
 // UsageFunc returns either the function set by SetUsageFunc for this command
 // or a parent, or it returns a default usage function.
 func (c *Command) UsageFunc() (f func(*Command) error) {
@@ -329,13 +384,22 @@ func (c *Command) Help() error {
 	return nil
 }
 
-// UsageString return usage string.
+// UsageString returns usage string.
 func (c *Command) UsageString() string {
-	tmpOutput := c.output
+	// Storing normal writers
+	tmpOutput := c.outWriter
+	tmpErr := c.errWriter
+
 	bb := new(bytes.Buffer)
-	c.SetOutput(bb)
+	c.outWriter = bb
+	c.errWriter = bb
+
 	c.Usage()
-	c.output = tmpOutput
+
+	// Setting things back to normal
+	c.outWriter = tmpOutput
+	c.errWriter = tmpErr
+
 	return bb.String()
 }
 
@@ -817,13 +881,11 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
 	// overriding
 	c.InitDefaultHelpCmd()
 
-	var args []string
+	args := c.args
 
 	// Workaround FAIL with "go test -v" or "cobra.test -test.v", see #155
 	if c.args == nil && filepath.Base(os.Args[0]) != "cobra.test" {
 		args = os.Args[1:]
-	} else {
-		args = c.args
 	}
 
 	var flags []string
@@ -1070,6 +1132,21 @@ func (c *Command) Printf(format string, i ...interface{}) {
 	c.Print(fmt.Sprintf(format, i...))
 }
 
+// PrintErr is a convenience method to Print to the defined Err output, fallback to Stderr if not set.
+func (c *Command) PrintErr(i ...interface{}) {
+	fmt.Fprint(c.ErrOrStderr(), i...)
+}
+
+// PrintErrln is a convenience method to Println to the defined Err output, fallback to Stderr if not set.
+func (c *Command) PrintErrln(i ...interface{}) {
+	c.Print(fmt.Sprintln(i...))
+}
+
+// PrintErrf is a convenience method to Printf to the defined Err output, fallback to Stderr if not set.
+func (c *Command) PrintErrf(format string, i ...interface{}) {
+	c.Print(fmt.Sprintf(format, i...))
+}
+
 // CommandPath returns the full path to this command.
 func (c *Command) CommandPath() string {
 	if c.HasParent() {
@@ -1335,7 +1412,7 @@ func (c *Command) LocalFlags() *flag.FlagSet {
 	return c.lflags
 }
 
-// InheritedFlags returns all flags which were inherited from parents commands.
+// InheritedFlags returns all flags which were inherited from parent commands.
 func (c *Command) InheritedFlags() *flag.FlagSet {
 	c.mergePersistentFlags()
 
diff --git a/vendor/github.com/spf13/cobra/command_win.go b/vendor/github.com/spf13/cobra/command_win.go
index edec728e4..8768b1736 100644
--- a/vendor/github.com/spf13/cobra/command_win.go
+++ b/vendor/github.com/spf13/cobra/command_win.go
@@ -3,6 +3,7 @@
 package cobra
 
 import (
+	"fmt"
 	"os"
 	"time"
 
@@ -14,7 +15,12 @@ var preExecHookFn = preExecHook
 func preExecHook(c *Command) {
 	if MousetrapHelpText != "" && mousetrap.StartedByExplorer() {
 		c.Print(MousetrapHelpText)
-		time.Sleep(5 * time.Second)
+		if MousetrapDisplayDuration > 0 {
+			time.Sleep(MousetrapDisplayDuration)
+		} else {
+			c.Println("Press return to continue...")
+			fmt.Scanln()
+		}
 		os.Exit(1)
 	}
 }
diff --git a/vendor/github.com/spf13/cobra/go.mod b/vendor/github.com/spf13/cobra/go.mod
new file mode 100644
index 000000000..9a9eb65a3
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/go.mod
@@ -0,0 +1,13 @@
+module github.com/spf13/cobra
+
+go 1.12
+
+require (
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/cpuguy83/go-md2man v1.0.10
+	github.com/inconshreveable/mousetrap v1.0.0
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/spf13/pflag v1.0.3
+	github.com/spf13/viper v1.3.2
+	gopkg.in/yaml.v2 v2.2.2
+)
diff --git a/vendor/github.com/spf13/cobra/go.sum b/vendor/github.com/spf13/cobra/go.sum
new file mode 100644
index 000000000..9761f4d03
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/go.sum
@@ -0,0 +1,51 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
+github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
+github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
+github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/magiconair/properties v1.8.0 h1:LLgXmsheXeRoUOBOjtwPQCWIYqM/LU1ayDtDePerRcY=
+github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
+github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
+github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/pelletier/go-toml v1.2.0 h1:T5zMGML61Wp+FlcbWjRDT7yAxhJNAiPPLOFECq181zc=
+github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
+github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
+github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
+github.com/spf13/cast v1.3.0 h1:oget//CVOEoFewqQxwr0Ej5yjygnqGkvggSE/gB35Q8=
+github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
+github.com/spf13/jwalterweatherman v1.0.0 h1:XHEdyB+EcvlqZamSM4ZOMGlc93t6AcsBEu9Gc1vn7yk=
+github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
+github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
+github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/spf13/viper v1.3.2 h1:VUFqw5KcqRf7i70GOzW7N+Q7+gxVBkSSqiXB12+JQ4M=
+github.com/spf13/viper v1.3.2/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
+golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a h1:1n5lsVfiQW3yfsRGu98756EH1YthsFqr/5mxHduZW2A=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/vendor/github.com/spf13/cobra/powershell_completions.go b/vendor/github.com/spf13/cobra/powershell_completions.go
new file mode 100644
index 000000000..756c61b9d
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/powershell_completions.go
@@ -0,0 +1,100 @@
+// PowerShell completions are based on the amazing work from clap:
+// https://github.com/clap-rs/clap/blob/3294d18efe5f264d12c9035f404c7d189d4824e1/src/completions/powershell.rs
+//
+// The generated scripts require PowerShell v5.0+ (which comes Windows 10, but
+// can be downloaded separately for windows 7 or 8.1).
+
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+var powerShellCompletionTemplate = `using namespace System.Management.Automation
+using namespace System.Management.Automation.Language
+Register-ArgumentCompleter -Native -CommandName '%s' -ScriptBlock {
+    param($wordToComplete, $commandAst, $cursorPosition)
+    $commandElements = $commandAst.CommandElements
+    $command = @(
+        '%s'
+        for ($i = 1; $i -lt $commandElements.Count; $i++) {
+            $element = $commandElements[$i]
+            if ($element -isnot [StringConstantExpressionAst] -or
+                $element.StringConstantType -ne [StringConstantType]::BareWord -or
+                $element.Value.StartsWith('-')) {
+                break
+            }
+            $element.Value
+        }
+    ) -join ';'
+    $completions = @(switch ($command) {%s
+    })
+    $completions.Where{ $_.CompletionText -like "$wordToComplete*" } |
+        Sort-Object -Property ListItemText
+}`
+
+func generatePowerShellSubcommandCases(out io.Writer, cmd *Command, previousCommandName string) {
+	var cmdName string
+	if previousCommandName == "" {
+		cmdName = cmd.Name()
+	} else {
+		cmdName = fmt.Sprintf("%s;%s", previousCommandName, cmd.Name())
+	}
+
+	fmt.Fprintf(out, "\n        '%s' {", cmdName)
+
+	cmd.Flags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		usage := escapeStringForPowerShell(flag.Usage)
+		if len(flag.Shorthand) > 0 {
+			fmt.Fprintf(out, "\n            [CompletionResult]::new('-%s', '%s', [CompletionResultType]::ParameterName, '%s')", flag.Shorthand, flag.Shorthand, usage)
+		}
+		fmt.Fprintf(out, "\n            [CompletionResult]::new('--%s', '%s', [CompletionResultType]::ParameterName, '%s')", flag.Name, flag.Name, usage)
+	})
+
+	for _, subCmd := range cmd.Commands() {
+		usage := escapeStringForPowerShell(subCmd.Short)
+		fmt.Fprintf(out, "\n            [CompletionResult]::new('%s', '%s', [CompletionResultType]::ParameterValue, '%s')", subCmd.Name(), subCmd.Name(), usage)
+	}
+
+	fmt.Fprint(out, "\n            break\n        }")
+
+	for _, subCmd := range cmd.Commands() {
+		generatePowerShellSubcommandCases(out, subCmd, cmdName)
+	}
+}
+
+func escapeStringForPowerShell(s string) string {
+	return strings.Replace(s, "'", "''", -1)
+}
+
+// GenPowerShellCompletion generates PowerShell completion file and writes to the passed writer.
+func (c *Command) GenPowerShellCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+
+	var subCommandCases bytes.Buffer
+	generatePowerShellSubcommandCases(&subCommandCases, c, "")
+	fmt.Fprintf(buf, powerShellCompletionTemplate, c.Name(), c.Name(), subCommandCases.String())
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+// GenPowerShellCompletionFile generates PowerShell completion file.
+func (c *Command) GenPowerShellCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenPowerShellCompletion(outFile)
+}
diff --git a/vendor/github.com/spf13/cobra/powershell_completions.md b/vendor/github.com/spf13/cobra/powershell_completions.md
new file mode 100644
index 000000000..afed80240
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/powershell_completions.md
@@ -0,0 +1,14 @@
+# Generating PowerShell Completions For Your Own cobra.Command
+
+Cobra can generate PowerShell completion scripts. Users need PowerShell version 5.0 or above, which comes with Windows 10 and can be downloaded separately for Windows 7 or 8.1. They can then write the completions to a file and source this file from their PowerShell profile, which is referenced by the `$Profile` environment variable. See `Get-Help about_Profiles` for more info about PowerShell profiles.
+
+# What's supported
+
+- Completion for subcommands using their `.Short` description
+- Completion for non-hidden flags using their `.Name` and `.Shorthand`
+
+# What's not yet supported
+
+- Command aliases
+- Required, filename or custom flags (they will work like normal flags)
+- Custom completion scripts
diff --git a/vendor/github.com/spf13/cobra/shell_completions.go b/vendor/github.com/spf13/cobra/shell_completions.go
new file mode 100644
index 000000000..ba0af9cb5
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/shell_completions.go
@@ -0,0 +1,85 @@
+package cobra
+
+import (
+	"github.com/spf13/pflag"
+)
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkFlagRequired(name string) error {
+	return MarkFlagRequired(c.Flags(), name)
+}
+
+// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkPersistentFlagRequired(name string) error {
+	return MarkFlagRequired(c.PersistentFlags(), name)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
+	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.Flags(), name, extensions...)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func (c *Command) MarkFlagCustom(name string, f string) error {
+	return MarkFlagCustom(c.Flags(), name, f)
+}
+
+// MarkPersistentFlagFilename instructs the various shell completion
+// implementations to limit completions for this persistent flag to the
+// specified extensions (patterns).
+//
+// Shell Completion compatibility matrix: bash, zsh
+func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
+}
+
+// MarkFlagFilename instructs the various shell completion implementations to
+// limit completions for this flag to the specified extensions (patterns).
+//
+// Shell Completion compatibility matrix: bash, zsh
+func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
+	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
+}
+
+// MarkFlagCustom instructs the various shell completion implementations to
+// limit completions for this flag to the specified extensions (patterns).
+//
+// Shell Completion compatibility matrix: bash, zsh
+func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
+	return flags.SetAnnotation(name, BashCompCustom, []string{f})
+}
+
+// MarkFlagDirname instructs the various shell completion implementations to
+// complete only directories with this named flag.
+//
+// Shell Completion compatibility matrix: zsh
+func (c *Command) MarkFlagDirname(name string) error {
+	return MarkFlagDirname(c.Flags(), name)
+}
+
+// MarkPersistentFlagDirname instructs the various shell completion
+// implementations to complete only directories with this persistent named flag.
+//
+// Shell Completion compatibility matrix: zsh
+func (c *Command) MarkPersistentFlagDirname(name string) error {
+	return MarkFlagDirname(c.PersistentFlags(), name)
+}
+
+// MarkFlagDirname instructs the various shell completion implementations to
+// complete only directories with this specified flag.
+//
+// Shell Completion compatibility matrix: zsh
+func MarkFlagDirname(flags *pflag.FlagSet, name string) error {
+	zshPattern := "-(/)"
+	return flags.SetAnnotation(name, zshCompDirname, []string{zshPattern})
+}
diff --git a/vendor/github.com/spf13/cobra/zsh_completions.go b/vendor/github.com/spf13/cobra/zsh_completions.go
index 889c22e27..12755482f 100644
--- a/vendor/github.com/spf13/cobra/zsh_completions.go
+++ b/vendor/github.com/spf13/cobra/zsh_completions.go
@@ -1,13 +1,102 @@
 package cobra
 
 import (
-	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
+	"sort"
 	"strings"
+	"text/template"
+
+	"github.com/spf13/pflag"
+)
+
+const (
+	zshCompArgumentAnnotation   = "cobra_annotations_zsh_completion_argument_annotation"
+	zshCompArgumentFilenameComp = "cobra_annotations_zsh_completion_argument_file_completion"
+	zshCompArgumentWordComp     = "cobra_annotations_zsh_completion_argument_word_completion"
+	zshCompDirname              = "cobra_annotations_zsh_dirname"
+)
+
+var (
+	zshCompFuncMap = template.FuncMap{
+		"genZshFuncName":              zshCompGenFuncName,
+		"extractFlags":                zshCompExtractFlag,
+		"genFlagEntryForZshArguments": zshCompGenFlagEntryForArguments,
+		"extractArgsCompletions":      zshCompExtractArgumentCompletionHintsForRendering,
+	}
+	zshCompletionText = `
+{{/* should accept Command (that contains subcommands) as parameter */}}
+{{define "argumentsC" -}}
+{{ $cmdPath := genZshFuncName .}}
+function {{$cmdPath}} {
+  local -a commands
+
+  _arguments -C \{{- range extractFlags .}}
+    {{genFlagEntryForZshArguments .}} \{{- end}}
+    "1: :->cmnds" \
+    "*::arg:->args"
+
+  case $state in
+  cmnds)
+    commands=({{range .Commands}}{{if not .Hidden}}
+      "{{.Name}}:{{.Short}}"{{end}}{{end}}
+    )
+    _describe "command" commands
+    ;;
+  esac
+
+  case "$words[1]" in {{- range .Commands}}{{if not .Hidden}}
+  {{.Name}})
+    {{$cmdPath}}_{{.Name}}
+    ;;{{end}}{{end}}
+  esac
+}
+{{range .Commands}}{{if not .Hidden}}
+{{template "selectCmdTemplate" .}}
+{{- end}}{{end}}
+{{- end}}
+
+{{/* should accept Command without subcommands as parameter */}}
+{{define "arguments" -}}
+function {{genZshFuncName .}} {
+{{"  _arguments"}}{{range extractFlags .}} \
+    {{genFlagEntryForZshArguments . -}}
+{{end}}{{range extractArgsCompletions .}} \
+    {{.}}{{end}}
+}
+{{end}}
+
+{{/* dispatcher for commands with or without subcommands */}}
+{{define "selectCmdTemplate" -}}
+{{if .Hidden}}{{/* ignore hidden*/}}{{else -}}
+{{if .Commands}}{{template "argumentsC" .}}{{else}}{{template "arguments" .}}{{end}}
+{{- end}}
+{{- end}}
+
+{{/* template entry point */}}
+{{define "Main" -}}
+#compdef _{{.Name}} {{.Name}}
+
+{{template "selectCmdTemplate" .}}
+{{end}}
+`
 )
 
+// zshCompArgsAnnotation is used to encode/decode zsh completion for
+// arguments to/from Command.Annotations.
+type zshCompArgsAnnotation map[int]zshCompArgHint
+
+type zshCompArgHint struct {
+	// Indicates the type of the completion to use. One of:
+	// zshCompArgumentFilenameComp or zshCompArgumentWordComp
+	Tipe string `json:"type"`
+
+	// A value for the type above (globs for file completion or words)
+	Options []string `json:"options"`
+}
+
 // GenZshCompletionFile generates zsh completion file.
 func (c *Command) GenZshCompletionFile(filename string) error {
 	outFile, err := os.Create(filename)
@@ -19,108 +108,229 @@ func (c *Command) GenZshCompletionFile(filename string) error {
 	return c.GenZshCompletion(outFile)
 }
 
-// GenZshCompletion generates a zsh completion file and writes to the passed writer.
+// GenZshCompletion generates a zsh completion file and writes to the passed
+// writer. The completion always run on the root command regardless of the
+// command it was called from.
 func (c *Command) GenZshCompletion(w io.Writer) error {
-	buf := new(bytes.Buffer)
-
-	writeHeader(buf, c)
-	maxDepth := maxDepth(c)
-	writeLevelMapping(buf, maxDepth)
-	writeLevelCases(buf, maxDepth, c)
+	tmpl, err := template.New("Main").Funcs(zshCompFuncMap).Parse(zshCompletionText)
+	if err != nil {
+		return fmt.Errorf("error creating zsh completion template: %v", err)
+	}
+	return tmpl.Execute(w, c.Root())
+}
 
-	_, err := buf.WriteTo(w)
-	return err
+// MarkZshCompPositionalArgumentFile marks the specified argument (first
+// argument is 1) as completed by file selection. patterns (e.g. "*.txt") are
+// optional - if not provided the completion will search for all files.
+func (c *Command) MarkZshCompPositionalArgumentFile(argPosition int, patterns ...string) error {
+	if argPosition < 1 {
+		return fmt.Errorf("Invalid argument position (%d)", argPosition)
+	}
+	annotation, err := c.zshCompGetArgsAnnotations()
+	if err != nil {
+		return err
+	}
+	if c.zshcompArgsAnnotationnIsDuplicatePosition(annotation, argPosition) {
+		return fmt.Errorf("Duplicate annotation for positional argument at index %d", argPosition)
+	}
+	annotation[argPosition] = zshCompArgHint{
+		Tipe:    zshCompArgumentFilenameComp,
+		Options: patterns,
+	}
+	return c.zshCompSetArgsAnnotations(annotation)
 }
 
-func writeHeader(w io.Writer, cmd *Command) {
-	fmt.Fprintf(w, "#compdef %s\n\n", cmd.Name())
+// MarkZshCompPositionalArgumentWords marks the specified positional argument
+// (first argument is 1) as completed by the provided words. At east one word
+// must be provided, spaces within words will be offered completion with
+// "word\ word".
+func (c *Command) MarkZshCompPositionalArgumentWords(argPosition int, words ...string) error {
+	if argPosition < 1 {
+		return fmt.Errorf("Invalid argument position (%d)", argPosition)
+	}
+	if len(words) == 0 {
+		return fmt.Errorf("Trying to set empty word list for positional argument %d", argPosition)
+	}
+	annotation, err := c.zshCompGetArgsAnnotations()
+	if err != nil {
+		return err
+	}
+	if c.zshcompArgsAnnotationnIsDuplicatePosition(annotation, argPosition) {
+		return fmt.Errorf("Duplicate annotation for positional argument at index %d", argPosition)
+	}
+	annotation[argPosition] = zshCompArgHint{
+		Tipe:    zshCompArgumentWordComp,
+		Options: words,
+	}
+	return c.zshCompSetArgsAnnotations(annotation)
 }
 
-func maxDepth(c *Command) int {
-	if len(c.Commands()) == 0 {
-		return 0
+func zshCompExtractArgumentCompletionHintsForRendering(c *Command) ([]string, error) {
+	var result []string
+	annotation, err := c.zshCompGetArgsAnnotations()
+	if err != nil {
+		return nil, err
 	}
-	maxDepthSub := 0
-	for _, s := range c.Commands() {
-		subDepth := maxDepth(s)
-		if subDepth > maxDepthSub {
-			maxDepthSub = subDepth
+	for k, v := range annotation {
+		s, err := zshCompRenderZshCompArgHint(k, v)
+		if err != nil {
+			return nil, err
 		}
+		result = append(result, s)
 	}
-	return 1 + maxDepthSub
+	if len(c.ValidArgs) > 0 {
+		if _, positionOneExists := annotation[1]; !positionOneExists {
+			s, err := zshCompRenderZshCompArgHint(1, zshCompArgHint{
+				Tipe:    zshCompArgumentWordComp,
+				Options: c.ValidArgs,
+			})
+			if err != nil {
+				return nil, err
+			}
+			result = append(result, s)
+		}
+	}
+	sort.Strings(result)
+	return result, nil
 }
 
-func writeLevelMapping(w io.Writer, numLevels int) {
-	fmt.Fprintln(w, `_arguments \`)
-	for i := 1; i <= numLevels; i++ {
-		fmt.Fprintf(w, `  '%d: :->level%d' \`, i, i)
-		fmt.Fprintln(w)
+func zshCompRenderZshCompArgHint(i int, z zshCompArgHint) (string, error) {
+	switch t := z.Tipe; t {
+	case zshCompArgumentFilenameComp:
+		var globs []string
+		for _, g := range z.Options {
+			globs = append(globs, fmt.Sprintf(`-g "%s"`, g))
+		}
+		return fmt.Sprintf(`'%d: :_files %s'`, i, strings.Join(globs, " ")), nil
+	case zshCompArgumentWordComp:
+		var words []string
+		for _, w := range z.Options {
+			words = append(words, fmt.Sprintf("%q", w))
+		}
+		return fmt.Sprintf(`'%d: :(%s)'`, i, strings.Join(words, " ")), nil
+	default:
+		return "", fmt.Errorf("Invalid zsh argument completion annotation: %s", t)
 	}
-	fmt.Fprintf(w, `  '%d: :%s'`, numLevels+1, "_files")
-	fmt.Fprintln(w)
 }
 
-func writeLevelCases(w io.Writer, maxDepth int, root *Command) {
-	fmt.Fprintln(w, "case $state in")
-	defer fmt.Fprintln(w, "esac")
+func (c *Command) zshcompArgsAnnotationnIsDuplicatePosition(annotation zshCompArgsAnnotation, position int) bool {
+	_, dup := annotation[position]
+	return dup
+}
 
-	for i := 1; i <= maxDepth; i++ {
-		fmt.Fprintf(w, "  level%d)\n", i)
-		writeLevel(w, root, i)
-		fmt.Fprintln(w, "  ;;")
+func (c *Command) zshCompGetArgsAnnotations() (zshCompArgsAnnotation, error) {
+	annotation := make(zshCompArgsAnnotation)
+	annotationString, ok := c.Annotations[zshCompArgumentAnnotation]
+	if !ok {
+		return annotation, nil
+	}
+	err := json.Unmarshal([]byte(annotationString), &annotation)
+	if err != nil {
+		return annotation, fmt.Errorf("Error unmarshaling zsh argument annotation: %v", err)
 	}
-	fmt.Fprintln(w, "  *)")
-	fmt.Fprintln(w, "    _arguments '*: :_files'")
-	fmt.Fprintln(w, "  ;;")
+	return annotation, nil
 }
 
-func writeLevel(w io.Writer, root *Command, i int) {
-	fmt.Fprintf(w, "    case $words[%d] in\n", i)
-	defer fmt.Fprintln(w, "    esac")
-
-	commands := filterByLevel(root, i)
-	byParent := groupByParent(commands)
+func (c *Command) zshCompSetArgsAnnotations(annotation zshCompArgsAnnotation) error {
+	jsn, err := json.Marshal(annotation)
+	if err != nil {
+		return fmt.Errorf("Error marshaling zsh argument annotation: %v", err)
+	}
+	if c.Annotations == nil {
+		c.Annotations = make(map[string]string)
+	}
+	c.Annotations[zshCompArgumentAnnotation] = string(jsn)
+	return nil
+}
 
-	for p, c := range byParent {
-		names := names(c)
-		fmt.Fprintf(w, "      %s)\n", p)
-		fmt.Fprintf(w, "        _arguments '%d: :(%s)'\n", i, strings.Join(names, " "))
-		fmt.Fprintln(w, "      ;;")
+func zshCompGenFuncName(c *Command) string {
+	if c.HasParent() {
+		return zshCompGenFuncName(c.Parent()) + "_" + c.Name()
 	}
-	fmt.Fprintln(w, "      *)")
-	fmt.Fprintln(w, "        _arguments '*: :_files'")
-	fmt.Fprintln(w, "      ;;")
+	return "_" + c.Name()
+}
 
+func zshCompExtractFlag(c *Command) []*pflag.Flag {
+	var flags []*pflag.Flag
+	c.LocalFlags().VisitAll(func(f *pflag.Flag) {
+		if !f.Hidden {
+			flags = append(flags, f)
+		}
+	})
+	c.InheritedFlags().VisitAll(func(f *pflag.Flag) {
+		if !f.Hidden {
+			flags = append(flags, f)
+		}
+	})
+	return flags
 }
 
-func filterByLevel(c *Command, l int) []*Command {
-	cs := make([]*Command, 0)
-	if l == 0 {
-		cs = append(cs, c)
-		return cs
+// zshCompGenFlagEntryForArguments returns an entry that matches _arguments
+// zsh-completion parameters. It's too complicated to generate in a template.
+func zshCompGenFlagEntryForArguments(f *pflag.Flag) string {
+	if f.Name == "" || f.Shorthand == "" {
+		return zshCompGenFlagEntryForSingleOptionFlag(f)
 	}
-	for _, s := range c.Commands() {
-		cs = append(cs, filterByLevel(s, l-1)...)
+	return zshCompGenFlagEntryForMultiOptionFlag(f)
+}
+
+func zshCompGenFlagEntryForSingleOptionFlag(f *pflag.Flag) string {
+	var option, multiMark, extras string
+
+	if zshCompFlagCouldBeSpecifiedMoreThenOnce(f) {
+		multiMark = "*"
 	}
-	return cs
+
+	option = "--" + f.Name
+	if option == "--" {
+		option = "-" + f.Shorthand
+	}
+	extras = zshCompGenFlagEntryExtras(f)
+
+	return fmt.Sprintf(`'%s%s[%s]%s'`, multiMark, option, zshCompQuoteFlagDescription(f.Usage), extras)
 }
 
-func groupByParent(commands []*Command) map[string][]*Command {
-	m := make(map[string][]*Command)
-	for _, c := range commands {
-		parent := c.Parent()
-		if parent == nil {
-			continue
-		}
-		m[parent.Name()] = append(m[parent.Name()], c)
+func zshCompGenFlagEntryForMultiOptionFlag(f *pflag.Flag) string {
+	var options, parenMultiMark, curlyMultiMark, extras string
+
+	if zshCompFlagCouldBeSpecifiedMoreThenOnce(f) {
+		parenMultiMark = "*"
+		curlyMultiMark = "\\*"
 	}
-	return m
+
+	options = fmt.Sprintf(`'(%s-%s %s--%s)'{%s-%s,%s--%s}`,
+		parenMultiMark, f.Shorthand, parenMultiMark, f.Name, curlyMultiMark, f.Shorthand, curlyMultiMark, f.Name)
+	extras = zshCompGenFlagEntryExtras(f)
+
+	return fmt.Sprintf(`%s'[%s]%s'`, options, zshCompQuoteFlagDescription(f.Usage), extras)
 }
 
-func names(commands []*Command) []string {
-	ns := make([]string, len(commands))
-	for i, c := range commands {
-		ns[i] = c.Name()
+func zshCompGenFlagEntryExtras(f *pflag.Flag) string {
+	if f.NoOptDefVal != "" {
+		return ""
 	}
-	return ns
+
+	extras := ":" // allow options for flag (even without assistance)
+	for key, values := range f.Annotations {
+		switch key {
+		case zshCompDirname:
+			extras = fmt.Sprintf(":filename:_files -g %q", values[0])
+		case BashCompFilenameExt:
+			extras = ":filename:_files"
+			for _, pattern := range values {
+				extras = extras + fmt.Sprintf(` -g "%s"`, pattern)
+			}
+		}
+	}
+
+	return extras
+}
+
+func zshCompFlagCouldBeSpecifiedMoreThenOnce(f *pflag.Flag) bool {
+	return strings.Contains(f.Value.Type(), "Slice") ||
+		strings.Contains(f.Value.Type(), "Array")
+}
+
+func zshCompQuoteFlagDescription(s string) string {
+	return strings.Replace(s, "'", `'\''`, -1)
 }
diff --git a/vendor/github.com/spf13/cobra/zsh_completions.md b/vendor/github.com/spf13/cobra/zsh_completions.md
new file mode 100644
index 000000000..df9c2eac9
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/zsh_completions.md
@@ -0,0 +1,39 @@
+## Generating Zsh Completion for your cobra.Command
+
+Cobra supports native Zsh completion generated from the root `cobra.Command`.
+The generated completion script should be put somewhere in your `$fpath` named
+`_<YOUR COMMAND>`.
+
+### What's Supported
+
+* Completion for all non-hidden subcommands using their `.Short` description.
+* Completion for all non-hidden flags using the following rules:
+  * Filename completion works by marking the flag with `cmd.MarkFlagFilename...`
+    family of commands.
+  * The requirement for argument to the flag is decided by the `.NoOptDefVal`
+    flag value - if it's empty then completion will expect an argument.
+  * Flags of one of the various `*Array` and `*Slice` types supports multiple
+    specifications (with or without argument depending on the specific type).
+* Completion of positional arguments using the following rules:
+  * Argument position for all options below starts at `1`. If argument position
+    `0` is requested it will raise an error.
+  * Use `command.MarkZshCompPositionalArgumentFile` to complete filenames. Glob
+    patterns (e.g. `"*.log"`) are optional - if not specified it will offer to
+    complete all file types.
+  * Use `command.MarkZshCompPositionalArgumentWords` to offer specific words for
+    completion. At least one word is required.
+  * It's possible to specify completion for some arguments and leave some
+    unspecified (e.g. offer words for second argument but nothing for first
+    argument). This will cause no completion for first argument but words
+    completion for second argument.
+  * If no argument completion was specified for 1st argument (but optionally was
+    specified for 2nd) and the command has `ValidArgs` it will be used as
+    completion options for 1st argument.
+  * Argument completions only offered for commands with no subcommands.
+
+### What's not yet Supported
+
+* Custom completion scripts are not supported yet (We should probably create zsh
+  specific one, doesn't make sense to re-use the bash one as the functions will
+  be different).
+* Whatever other feature you're looking for and doesn't exist :)
diff --git a/vendor/github.com/tchap/go-patricia/patricia/children.go b/vendor/github.com/tchap/go-patricia/patricia/children.go
index a5677c335..bcfd0a5dd 100644
--- a/vendor/github.com/tchap/go-patricia/patricia/children.go
+++ b/vendor/github.com/tchap/go-patricia/patricia/children.go
@@ -20,6 +20,7 @@ type childList interface {
 	next(b byte) *Trie
 	walk(prefix *Prefix, visitor VisitorFunc) error
 	print(w io.Writer, indent int)
+	clone() childList
 	total() int
 }
 
@@ -143,6 +144,17 @@ func (list *sparseChildList) total() int {
 	return tot
 }
 
+func (list *sparseChildList) clone() childList {
+	clones := make(tries, len(list.children), cap(list.children))
+	for i, child := range list.children {
+		clones[i] = child.Clone()
+	}
+
+	return &sparseChildList{
+		children: clones,
+	}
+}
+
 func (list *sparseChildList) print(w io.Writer, indent int) {
 	for _, child := range list.children {
 		if child != nil {
@@ -314,6 +326,32 @@ func (list *denseChildList) print(w io.Writer, indent int) {
 	}
 }
 
+func (list *denseChildList) clone() childList {
+	clones := make(tries, cap(list.children))
+
+	if list.numChildren != 0 {
+		clonedCount := 0
+		for i := list.headIndex; i < len(list.children); i++ {
+			child := list.children[i]
+			if child != nil {
+				clones[i] = child.Clone()
+				clonedCount++
+				if clonedCount == list.numChildren {
+					break
+				}
+			}
+		}
+	}
+
+	return &denseChildList{
+		min:         list.min,
+		max:         list.max,
+		numChildren: list.numChildren,
+		headIndex:   list.headIndex,
+		children:    clones,
+	}
+}
+
 func (list *denseChildList) total() int {
 	tot := 0
 	for _, child := range list.children {
diff --git a/vendor/github.com/tchap/go-patricia/patricia/patricia.go b/vendor/github.com/tchap/go-patricia/patricia/patricia.go
index a1fc53d5d..7b9975e38 100644
--- a/vendor/github.com/tchap/go-patricia/patricia/patricia.go
+++ b/vendor/github.com/tchap/go-patricia/patricia/patricia.go
@@ -77,6 +77,18 @@ func MaxChildrenPerSparseNode(value int) Option {
 	}
 }
 
+// Clone makes a copy of an existing trie.
+// Items stored in both tries become shared, obviously.
+func (trie *Trie) Clone() *Trie {
+	return &Trie{
+		prefix:                   append(Prefix(nil), trie.prefix...),
+		item:                     trie.item,
+		maxPrefixPerNode:         trie.maxPrefixPerNode,
+		maxChildrenPerSparseNode: trie.maxChildrenPerSparseNode,
+		children:                 trie.children.clone(),
+	}
+}
+
 // Item returns the item stored in the root of this trie.
 func (trie *Trie) Item() Item {
 	return trie.item
diff --git a/vendor/github.com/uber/jaeger-client-go/.travis.yml b/vendor/github.com/uber/jaeger-client-go/.travis.yml
index a6bd65d67..acdc2a010 100644
--- a/vendor/github.com/uber/jaeger-client-go/.travis.yml
+++ b/vendor/github.com/uber/jaeger-client-go/.travis.yml
@@ -7,18 +7,18 @@ dist: trusty
 
 matrix:
   include:
-  - go: 1.11.5
+  - go: 1.12.x
     env:
     - TESTS=true
     - COVERAGE=true
-  - go: 1.11.5
+  - go: 1.12.x
     env:
     - CROSSDOCK=true
-  - go: 1.11.5
+  - go: 1.12.x
     env:
     - TESTS=true
     - USE_DEP=true
-  - go: 1.10.8
+  - go: 1.11.x
     env:
     - TESTS=true
     - USE_DEP=true
diff --git a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
index 4b3568ac1..05216d5a8 100644
--- a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
+++ b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
@@ -1,10 +1,23 @@
 Changes by Version
 ==================
 
-2.15.1 (unreleased)
--------------------
-
-- nothing yet
+2.16.0 (2019-03-24)
+-------------------
+
+- Add baggage to B3 codec (#319) <Pavol Loffay>
+- Add support for 128bit trace ids to zipkin thrift spans. (#378) <Douglas Reid>
+- Update zipkin propagation logic to support 128bit traceIDs (#373) <Douglas Reid>
+- Accept "true" for the x-b3-sampled header (#356) <Adrian Bogatu>
+
+- Allow setting of PoolSpans from Config object (#322) <Matthew Pound>
+- Make propagators public to allow wrapping (#379) <Ivan Babrou>
+- Change default metric namespace to use relevant separator for the metric backend (#364) <Gary Brown>
+- Change metrics prefix to jaeger_tracer and add descriptions (#346) <Gary Brown>
+- Bump OpenTracing to ^1.1.x (#383) <Yuri Shkuro>
+- Upgrade jaeger-lib to v2.0.0 (#359) <Gary Brown>
+- Avoid defer when generating random number (#358) <Gary Brown>
+- Use a pool of rand.Source to reduce lock contention when creating span ids (#357) <Gary Brown>
+- Make JAEGER_ENDPOINT take priority over JAEGER_AGENT_XXX (#342) <Eundoo Song>
 
 
 2.15.0 (2018-10-10)
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.lock b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
index 0cbdadf7d..55d9ac030 100644
--- a/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
@@ -3,175 +3,177 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:c0bec5f9b98d0bc872ff5e834fac186b807b656683bd29cb82fb207a1513fabb"
+  digest = "1:d6afaeed1502aa28e80a4ed0981d570ad91b2579193404256ce672ed0a609e0d"
   name = "github.com/beorn7/perks"
   packages = ["quantile"]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
 
 [[projects]]
   branch = "master"
-  digest = "1:c46fd324e7902268373e1b337436a6377c196e2dbd7b35624c6256d29d494e78"
+  digest = "1:4c4c33075b704791d6a7f09dfb55c66769e8a1dc6adf87026292d274fe8ad113"
   name = "github.com/codahale/hdrhistogram"
   packages = ["."]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "3a0bb77429bd3a61596f5e8a3172445844342120"
 
 [[projects]]
   branch = "master"
-  digest = "1:5d9e0d8f9e3d9b475ec00b7f6c4836e42e2c3cf4a1ed8221f35f5b7b7d7c1b19"
+  digest = "1:a382acd6150713655ded76ab5fbcbc7924a7808dab4312dda5d1f23dd8ce5277"
   name = "github.com/crossdock/crossdock-go"
   packages = [
     ".",
     "assert",
     "require",
   ]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "049aabb0122b03bc9bd30cab8f3f91fb60166361"
 
 [[projects]]
-  digest = "1:56c130d885a4aacae1dd9c7b71cfe39912c7ebc1ff7d2b46083c8812996dc43b"
+  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
-  pruneopts = ""
-  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
-  version = "v1.1.0"
+  pruneopts = "UT"
+  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
+  version = "v1.1.1"
 
 [[projects]]
-  digest = "1:bcb38c8fc9b21bb8682ce2d605a7d4aeb618abc7f827e3ac0b27c0371fdb23fb"
+  digest = "1:318f1c959a8a740366fce4b1e1eb2fd914036b4af58fbd0a003349b305f118ad"
   name = "github.com/golang/protobuf"
   packages = ["proto"]
-  pruneopts = ""
-  revision = "925541529c1fa6821df4e44ce2723319eb2be768"
-  version = "v1.0.0"
+  pruneopts = "UT"
+  revision = "b5d812f8a3706043e23a9cd5babf2e5423744d30"
+  version = "v1.3.1"
 
 [[projects]]
-  digest = "1:4c23ced97a470b17d9ffd788310502a077b9c1f60221a85563e49696276b4147"
+  digest = "1:ff5ebae34cfbf047d505ee150de27e60570e8c394b3b8fdbb720ff6ac71985fc"
   name = "github.com/matttproud/golang_protobuf_extensions"
   packages = ["pbutil"]
-  pruneopts = ""
-  revision = "3247c84500bff8d9fb6d579d800f20b3e091582c"
-  version = "v1.0.0"
+  pruneopts = "UT"
+  revision = "c12348ce28de40eed0136aa2b644d0ee0650e56c"
+  version = "v1.0.1"
 
 [[projects]]
-  digest = "1:78fb99d6011c2ae6c72f3293a83951311147b12b06a5ffa43abf750c4fab6ac5"
+  digest = "1:727b8f567a30d0739d6c26b9472b3422b351c93cf62095164c845a54b16fc18e"
   name = "github.com/opentracing/opentracing-go"
   packages = [
     ".",
     "ext",
+    "harness",
     "log",
   ]
-  pruneopts = ""
-  revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
-  version = "v1.0.2"
+  pruneopts = "UT"
+  revision = "659c90643e714681897ec2521c60567dd21da733"
+  version = "v1.1.0"
 
 [[projects]]
-  digest = "1:7365acd48986e205ccb8652cc746f09c8b7876030d53710ea6ef7d0bd0dcd7ca"
+  digest = "1:cf31692c14422fa27c83a05292eb5cbe0fb2775972e8f1f8446a71549bd8980b"
   name = "github.com/pkg/errors"
   packages = ["."]
-  pruneopts = ""
-  revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
-  version = "v0.8.0"
+  pruneopts = "UT"
+  revision = "ba968bfe8b2f7e042a574c888954fccecfa385b4"
+  version = "v0.8.1"
 
 [[projects]]
-  digest = "1:256484dbbcd271f9ecebc6795b2df8cad4c458dd0f5fd82a8c2fa0c29f233411"
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
   name = "github.com/pmezard/go-difflib"
   packages = ["difflib"]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
   version = "v1.0.0"
 
 [[projects]]
-  digest = "1:4142d94383572e74b42352273652c62afec5b23f325222ed09198f46009022d1"
+  digest = "1:b6221ec0f8903b556e127c449e7106b63e6867170c2d10a7c058623d086f2081"
   name = "github.com/prometheus/client_golang"
   packages = ["prometheus"]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "c5b7fccd204277076155f10851dad72b76a49317"
   version = "v0.8.0"
 
 [[projects]]
   branch = "master"
-  digest = "1:60aca47f4eeeb972f1b9da7e7db51dee15ff6c59f7b401c1588b8e6771ba15ef"
+  digest = "1:2d5cd61daa5565187e1d96bae64dbbc6080dacf741448e9629c64fd93203b0d4"
   name = "github.com/prometheus/client_model"
   packages = ["go"]
-  pruneopts = ""
-  revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
+  pruneopts = "UT"
+  revision = "fd36f4220a901265f90734c3183c5f0c91daa0b8"
 
 [[projects]]
-  branch = "master"
-  digest = "1:b841dfec30d5d89de895adfa2314a031b2c65b402af11b89a221f2e986639c8f"
+  digest = "1:35cf6bdf68db765988baa9c4f10cc5d7dda1126a54bd62e252dbcd0b1fc8da90"
   name = "github.com/prometheus/common"
   packages = [
     "expfmt",
     "internal/bitbucket.org/ww/goautoneg",
     "model",
   ]
-  pruneopts = ""
-  revision = "d811d2e9bf898806ecfb6ef6296774b13ffc314c"
+  pruneopts = "UT"
+  revision = "cfeb6f9992ffa54aaa4f2170ade4067ee478b250"
+  version = "v0.2.0"
 
 [[projects]]
   branch = "master"
-  digest = "1:61df0898746840afc7be5dc2c3eeec83022fab70df11ecee5b16c85e912cf5ed"
+  digest = "1:c31163bd62461e0c5f7ddc7363e39ef8d9e929693e77b5c11c709b05f9cb9219"
   name = "github.com/prometheus/procfs"
   packages = [
     ".",
     "internal/util",
+    "iostats",
     "nfs",
     "xfs",
   ]
-  pruneopts = ""
-  revision = "8b1c2da0d56deffdbb9e48d4414b4e674bd8083e"
+  pruneopts = "UT"
+  revision = "55ae3d9d557340b5bc24cd8aa5f6fa2c2ab31352"
 
 [[projects]]
-  digest = "1:a30066593578732a356dc7e5d7f78d69184ca65aeeff5939241a3ab10559bb06"
+  digest = "1:8ff03ccc603abb0d7cce94d34b613f5f6251a9e1931eba1a3f9888a9029b055c"
   name = "github.com/stretchr/testify"
   packages = [
     "assert",
     "require",
     "suite",
   ]
-  pruneopts = ""
-  revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
-  version = "v1.2.1"
+  pruneopts = "UT"
+  revision = "ffdc059bfe9ce6a4e144ba849dbedead332c6053"
+  version = "v1.3.0"
 
 [[projects]]
-  digest = "1:6e8d05f4da3ff913adf807cb34623811f764b4924369f65c3ab9db744e8fe6ad"
+  digest = "1:3c1a69cdae3501bf75e76d0d86dc6f2b0a7421bc205c0cb7b96b19eed464a34d"
   name = "github.com/uber-go/atomic"
   packages = ["."]
-  pruneopts = ""
-  revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
-  version = "v1.3.1"
+  pruneopts = "UT"
+  revision = "1ea20fb1cbb1cc08cbd0d913a96dead89aa18289"
+  version = "v1.3.2"
 
 [[projects]]
-  digest = "1:2e2e1bf63381476d203354c0c3c4692d103e8d02ea2bfafe8e3f80a04c925b87"
+  digest = "1:f5c5ad1e08141e18aee1b9c37729d93d06805840421ccfc9d407787ffe969ce6"
   name = "github.com/uber/jaeger-lib"
   packages = [
     "metrics",
     "metrics/metricstest",
     "metrics/prometheus",
   ]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "0e30338a695636fe5bcf7301e8030ce8dd2a8530"
   version = "v2.0.0"
 
 [[projects]]
-  digest = "1:ecd794db626d001bd7e9115eb5f1c9cf85ab27ef3b5acd49795672f74f5a3ca5"
+  digest = "1:3c1a69cdae3501bf75e76d0d86dc6f2b0a7421bc205c0cb7b96b19eed464a34d"
   name = "go.uber.org/atomic"
   packages = ["."]
-  pruneopts = ""
-  revision = "54f72d32435d760d5604f17a82e2435b28dc4ba5"
-  version = "v1.3.0"
+  pruneopts = "UT"
+  revision = "1ea20fb1cbb1cc08cbd0d913a96dead89aa18289"
+  version = "v1.3.2"
 
 [[projects]]
-  digest = "1:22c7effcb4da0eacb2bb1940ee173fac010e9ef3c691f5de4b524d538bd980f5"
+  digest = "1:60bf2a5e347af463c42ed31a493d817f8a72f102543060ed992754e689805d1a"
   name = "go.uber.org/multierr"
   packages = ["."]
-  pruneopts = ""
+  pruneopts = "UT"
   revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
   version = "v1.1.0"
 
 [[projects]]
-  digest = "1:6c2f76bad9a8ae48ec06108899e065a327d01afa43300f652443a05678cdca17"
+  digest = "1:c52caf7bd44f92e54627a31b85baf06a68333a196b3d8d241480a774733dcf8b"
   name = "go.uber.org/zap"
   packages = [
     ".",
@@ -181,20 +183,20 @@
     "internal/exit",
     "zapcore",
   ]
-  pruneopts = ""
-  revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
-  version = "v1.8.0"
+  pruneopts = "UT"
+  revision = "ff33455a0e382e8a81d14dd7c922020b6b5e7982"
+  version = "v1.9.1"
 
 [[projects]]
   branch = "master"
-  digest = "1:80ec738f420f13c23460cc92cd893d3e403588c60682afebbd4515eca5e19578"
+  digest = "1:f8b491a7c25030a895a0e579742d07136e6958e77ef2d46e769db8eec4e58fcd"
   name = "golang.org/x/net"
   packages = [
     "context",
     "context/ctxhttp",
   ]
-  pruneopts = ""
-  revision = "5f9ae10d9af5b1c89ae6904293b14b064d4ada23"
+  pruneopts = "UT"
+  revision = "addf6b3196f61cd44ce5a76657913698c73479d0"
 
 [solve-meta]
   analyzer-name = "dep"
@@ -203,6 +205,7 @@
     "github.com/crossdock/crossdock-go",
     "github.com/opentracing/opentracing-go",
     "github.com/opentracing/opentracing-go/ext",
+    "github.com/opentracing/opentracing-go/harness",
     "github.com/opentracing/opentracing-go/log",
     "github.com/pkg/errors",
     "github.com/prometheus/client_golang/prometheus",
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.toml b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
index ee84766ad..067f15a92 100644
--- a/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
@@ -4,7 +4,7 @@
 
 [[constraint]]
   name = "github.com/opentracing/opentracing-go"
-  version = "^1"
+  version = "^1.1"
 
 [[constraint]]
   name = "github.com/prometheus/client_golang"
@@ -25,3 +25,7 @@
 [[constraint]]
   name = "go.uber.org/zap"
   version = "^1"
+
+[prune]
+  go-tests = true
+  unused-packages = true
diff --git a/vendor/github.com/uber/jaeger-client-go/Makefile b/vendor/github.com/uber/jaeger-client-go/Makefile
index 105e5372a..1b10c0964 100644
--- a/vendor/github.com/uber/jaeger-client-go/Makefile
+++ b/vendor/github.com/uber/jaeger-client-go/Makefile
@@ -35,6 +35,9 @@ test-and-lint: test fmt lint
 
 .PHONY: test
 test:
+ifeq ($(USE_DEP),true)
+	dep check
+endif
 	bash -c "set -e; set -o pipefail; $(GOTEST) $(PACKAGES) | $(COLORIZE)"
 
 .PHONY: fmt
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config.go b/vendor/github.com/uber/jaeger-client-go/config/config.go
index 821333ddb..320125087 100644
--- a/vendor/github.com/uber/jaeger-client-go/config/config.go
+++ b/vendor/github.com/uber/jaeger-client-go/config/config.go
@@ -231,6 +231,7 @@ func (c Configuration) NewTracer(options ...Option) (opentracing.Tracer, io.Clos
 		jaeger.TracerOptions.Logger(opts.logger),
 		jaeger.TracerOptions.CustomHeaderKeys(c.Headers),
 		jaeger.TracerOptions.Gen128Bit(opts.gen128Bit),
+		jaeger.TracerOptions.PoolSpans(opts.poolSpans),
 		jaeger.TracerOptions.ZipkinSharedRPCSpan(opts.zipkinSharedRPCSpan),
 		jaeger.TracerOptions.MaxTagValueLength(opts.maxTagValueLength),
 	}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/options.go b/vendor/github.com/uber/jaeger-client-go/config/options.go
index 9eed0ec75..322691bea 100644
--- a/vendor/github.com/uber/jaeger-client-go/config/options.go
+++ b/vendor/github.com/uber/jaeger-client-go/config/options.go
@@ -33,6 +33,7 @@ type Options struct {
 	contribObservers    []jaeger.ContribObserver
 	observers           []jaeger.Observer
 	gen128Bit           bool
+	poolSpans           bool
 	zipkinSharedRPCSpan bool
 	maxTagValueLength   int
 	tags                []opentracing.Tag
@@ -93,6 +94,13 @@ func Gen128Bit(gen128Bit bool) Option {
 	}
 }
 
+// PoolSpans specifies whether to pool spans
+func PoolSpans(poolSpans bool) Option {
+	return func(c *Options) {
+		c.poolSpans = poolSpans
+	}
+}
+
 // ZipkinSharedRPCSpan creates an option that enables sharing span ID between client
 // and server spans a la zipkin. If false, client and server spans will be assigned
 // different IDs.
diff --git a/vendor/github.com/uber/jaeger-client-go/constants.go b/vendor/github.com/uber/jaeger-client-go/constants.go
index 5a4e18752..aa2d43fc8 100644
--- a/vendor/github.com/uber/jaeger-client-go/constants.go
+++ b/vendor/github.com/uber/jaeger-client-go/constants.go
@@ -16,7 +16,7 @@ package jaeger
 
 const (
 	// JaegerClientVersion is the version of the client library reported as Span tag.
-	JaegerClientVersion = "Go-2.15.1dev"
+	JaegerClientVersion = "Go-2.16.0"
 
 	// JaegerClientVersionTagKey is the name of the tag used to report client version.
 	JaegerClientVersionTagKey = "jaeger.version"
diff --git a/vendor/github.com/uber/jaeger-client-go/context.go b/vendor/github.com/uber/jaeger-client-go/context.go
index 8b06173d9..90045f4fc 100644
--- a/vendor/github.com/uber/jaeger-client-go/context.go
+++ b/vendor/github.com/uber/jaeger-client-go/context.go
@@ -198,7 +198,7 @@ func (c SpanContext) WithBaggageItem(key, value string) SpanContext {
 // extract method, but now it returns a dummy context with only debugID filled in.
 //
 // See JaegerDebugHeader in constants.go
-// See textMapPropagator#Extract
+// See TextMapPropagator#Extract
 func (c *SpanContext) isDebugIDContainerOnly() bool {
 	return !c.traceID.IsValid() && c.debugID != ""
 }
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.lock b/vendor/github.com/uber/jaeger-client-go/glide.lock
index 704795b6d..af659ca0e 100644
--- a/vendor/github.com/uber/jaeger-client-go/glide.lock
+++ b/vendor/github.com/uber/jaeger-client-go/glide.lock
@@ -1,5 +1,5 @@
-hash: 3accf84f97bff4a91162736104c0e9b9790820712bd86db6fec5e665f7196a82
-updated: 2018-04-30T11:46:43.804556-04:00
+hash: 92cc8f956428fc65bee07d809a752f34376aece141c934eff02aefa08d450b72
+updated: 2019-03-23T18:26:09.960887-04:00
 imports:
 - name: github.com/beorn7/perks
   version: 3a771d992973f24aa725d07868b467d1ddfceafb
@@ -13,7 +13,7 @@ imports:
   - assert
   - require
 - name: github.com/davecgh/go-spew
-  version: 8991bc29aa16c548c550c7ff78260e27b9ab7c73
+  version: d8f796af33cc11cb798c1aaeb27a4ebc5099927d
   subpackages:
   - spew
 - name: github.com/golang/protobuf
@@ -25,12 +25,13 @@ imports:
   subpackages:
   - pbutil
 - name: github.com/opentracing/opentracing-go
-  version: 1949ddbfd147afd4d964a9f00b24eb291e0e7c38
+  version: 659c90643e714681897ec2521c60567dd21da733
   subpackages:
   - ext
+  - harness
   - log
 - name: github.com/pkg/errors
-  version: 645ef00459ed84a119197bfb8d8205042c6df63d
+  version: ba968bfe8b2f7e042a574c888954fccecfa385b4
 - name: github.com/pmezard/go-difflib
   version: 792786c7400a136282c1664665ae0a8db921c6c2
   subpackages:
@@ -56,7 +57,7 @@ imports:
   - nfs
   - xfs
 - name: github.com/stretchr/testify
-  version: 12b6f73e6084dad08a7c6e575284b177ecafbc71
+  version: f35b8ab0b5a2cef36673838d662e249dd9c94686
   subpackages:
   - assert
   - require
@@ -68,11 +69,11 @@ imports:
   - metrics/metricstest
   - metrics/prometheus
 - name: go.uber.org/atomic
-  version: 8474b86a5a6f79c443ce4b2992817ff32cf208b8
+  version: 1ea20fb1cbb1cc08cbd0d913a96dead89aa18289
 - name: go.uber.org/multierr
   version: 3c4937480c32f4c13a875a1829af76c98ca3d40a
 - name: go.uber.org/zap
-  version: eeedf312bc6c57391d84767a4cd413f02a917974
+  version: ff33455a0e382e8a81d14dd7c922020b6b5e7982
   subpackages:
   - buffer
   - internal/bufferpool
@@ -80,7 +81,7 @@ imports:
   - internal/exit
   - zapcore
 - name: golang.org/x/net
-  version: 6078986fec03a1dcc236c34816c71b0e05018fda
+  version: 49bb7cea24b1df9410e1712aa6433dae904ff66a
   subpackages:
   - context
   - context/ctxhttp
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.yaml b/vendor/github.com/uber/jaeger-client-go/glide.yaml
index c33badf54..b3e5b80bc 100644
--- a/vendor/github.com/uber/jaeger-client-go/glide.yaml
+++ b/vendor/github.com/uber/jaeger-client-go/glide.yaml
@@ -1,7 +1,7 @@
 package: github.com/uber/jaeger-client-go
 import:
 - package: github.com/opentracing/opentracing-go
-  version: ^1
+  version: ^1.1
   subpackages:
   - ext
   - log
diff --git a/vendor/github.com/uber/jaeger-client-go/header.go b/vendor/github.com/uber/jaeger-client-go/header.go
index 19c2c055b..5da70351d 100644
--- a/vendor/github.com/uber/jaeger-client-go/header.go
+++ b/vendor/github.com/uber/jaeger-client-go/header.go
@@ -38,7 +38,8 @@ type HeadersConfig struct {
 	TraceBaggageHeaderPrefix string `yaml:"traceBaggageHeaderPrefix"`
 }
 
-func (c *HeadersConfig) applyDefaults() *HeadersConfig {
+// ApplyDefaults sets missing configuration keys to default values
+func (c *HeadersConfig) ApplyDefaults() *HeadersConfig {
 	if c.JaegerBaggageHeader == "" {
 		c.JaegerBaggageHeader = JaegerBaggageHeader
 	}
diff --git a/vendor/github.com/uber/jaeger-client-go/propagation.go b/vendor/github.com/uber/jaeger-client-go/propagation.go
index abca67a3c..5b50cfb71 100644
--- a/vendor/github.com/uber/jaeger-client-go/propagation.go
+++ b/vendor/github.com/uber/jaeger-client-go/propagation.go
@@ -51,15 +51,17 @@ type Extractor interface {
 	Extract(carrier interface{}) (SpanContext, error)
 }
 
-type textMapPropagator struct {
+// TextMapPropagator is a combined Injector and Extractor for TextMap format
+type TextMapPropagator struct {
 	headerKeys  *HeadersConfig
 	metrics     Metrics
 	encodeValue func(string) string
 	decodeValue func(string) string
 }
 
-func newTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
-	return &textMapPropagator{
+// NewTextMapPropagator creates a combined Injector and Extractor for TextMap format
+func NewTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *TextMapPropagator {
+	return &TextMapPropagator{
 		headerKeys: headerKeys,
 		metrics:    metrics,
 		encodeValue: func(val string) string {
@@ -71,8 +73,9 @@ func newTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPr
 	}
 }
 
-func newHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMapPropagator {
-	return &textMapPropagator{
+// NewHTTPHeaderPropagator creates a combined Injector and Extractor for HTTPHeaders format
+func NewHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *TextMapPropagator {
+	return &TextMapPropagator{
 		headerKeys: headerKeys,
 		metrics:    metrics,
 		encodeValue: func(val string) string {
@@ -88,19 +91,22 @@ func newHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *textMa
 	}
 }
 
-type binaryPropagator struct {
+// BinaryPropagator is a combined Injector and Extractor for Binary format
+type BinaryPropagator struct {
 	tracer  *Tracer
 	buffers sync.Pool
 }
 
-func newBinaryPropagator(tracer *Tracer) *binaryPropagator {
-	return &binaryPropagator{
+// NewBinaryPropagator creates a combined Injector and Extractor for Binary format
+func NewBinaryPropagator(tracer *Tracer) *BinaryPropagator {
+	return &BinaryPropagator{
 		tracer:  tracer,
 		buffers: sync.Pool{New: func() interface{} { return &bytes.Buffer{} }},
 	}
 }
 
-func (p *textMapPropagator) Inject(
+// Inject implements Injector of TextMapPropagator
+func (p *TextMapPropagator) Inject(
 	sc SpanContext,
 	abstractCarrier interface{},
 ) error {
@@ -121,7 +127,8 @@ func (p *textMapPropagator) Inject(
 	return nil
 }
 
-func (p *textMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+// Extract implements Extractor of TextMapPropagator
+func (p *TextMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
 	textMapReader, ok := abstractCarrier.(opentracing.TextMapReader)
 	if !ok {
 		return emptyContext, opentracing.ErrInvalidCarrier
@@ -166,7 +173,8 @@ func (p *textMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, e
 	return ctx, nil
 }
 
-func (p *binaryPropagator) Inject(
+// Inject implements Injector of BinaryPropagator
+func (p *BinaryPropagator) Inject(
 	sc SpanContext,
 	abstractCarrier interface{},
 ) error {
@@ -207,7 +215,8 @@ func (p *binaryPropagator) Inject(
 	return nil
 }
 
-func (p *binaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+// Extract implements Extractor of BinaryPropagator
+func (p *BinaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
 	carrier, ok := abstractCarrier.(io.Reader)
 	if !ok {
 		return emptyContext, opentracing.ErrInvalidCarrier
@@ -269,7 +278,7 @@ func (p *binaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, er
 // is converted to map[string]string { "key1" : "value1",
 //                                     "key2" : "value2",
 //                                     "key3" : "value3" }
-func (p *textMapPropagator) parseCommaSeparatedMap(value string) map[string]string {
+func (p *TextMapPropagator) parseCommaSeparatedMap(value string) map[string]string {
 	baggage := make(map[string]string)
 	value, err := url.QueryUnescape(value)
 	if err != nil {
@@ -289,12 +298,12 @@ func (p *textMapPropagator) parseCommaSeparatedMap(value string) map[string]stri
 
 // Converts a baggage item key into an http header format,
 // by prepending TraceBaggageHeaderPrefix and encoding the key string
-func (p *textMapPropagator) addBaggageKeyPrefix(key string) string {
+func (p *TextMapPropagator) addBaggageKeyPrefix(key string) string {
 	// TODO encodeBaggageKeyAsHeader add caching and escaping
 	return fmt.Sprintf("%v%v", p.headerKeys.TraceBaggageHeaderPrefix, key)
 }
 
-func (p *textMapPropagator) removeBaggageKeyPrefix(key string) string {
+func (p *TextMapPropagator) removeBaggageKeyPrefix(key string) string {
 	// TODO decodeBaggageHeaderKey add caching and escaping
 	return key[len(p.headerKeys.TraceBaggageHeaderPrefix):]
 }
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go
index f05144bfc..a53d46f0e 100644
--- a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/constants.go
@@ -18,6 +18,8 @@ const CLIENT_SEND = "cs"
 const CLIENT_RECV = "cr"
 const SERVER_SEND = "ss"
 const SERVER_RECV = "sr"
+const MESSAGE_SEND = "ms"
+const MESSAGE_RECV = "mr"
 const WIRE_SEND = "ws"
 const WIRE_RECV = "wr"
 const CLIENT_SEND_FRAGMENT = "csf"
@@ -27,6 +29,7 @@ const SERVER_RECV_FRAGMENT = "srf"
 const LOCAL_COMPONENT = "lc"
 const CLIENT_ADDR = "ca"
 const SERVER_ADDR = "sa"
+const MESSAGE_ADDR = "ma"
 
 func init() {
 }
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go
index 34b2b267e..2d49e1d5f 100644
--- a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/ttypes.go
@@ -103,10 +103,12 @@ func (p *AnnotationType) UnmarshalText(text []byte) error {
 //  - ServiceName: Service name in lowercase, such as "memcache" or "zipkin-web"
 //
 // Conventionally, when the service name isn't known, service_name = "unknown".
+//  - Ipv6: IPv6 host address packed into 16 bytes. Ex Inet6Address.getBytes()
 type Endpoint struct {
 	Ipv4        int32  `thrift:"ipv4,1" json:"ipv4"`
 	Port        int16  `thrift:"port,2" json:"port"`
 	ServiceName string `thrift:"service_name,3" json:"service_name"`
+	Ipv6        []byte `thrift:"ipv6,4" json:"ipv6,omitempty"`
 }
 
 func NewEndpoint() *Endpoint {
@@ -124,6 +126,16 @@ func (p *Endpoint) GetPort() int16 {
 func (p *Endpoint) GetServiceName() string {
 	return p.ServiceName
 }
+
+var Endpoint_Ipv6_DEFAULT []byte
+
+func (p *Endpoint) GetIpv6() []byte {
+	return p.Ipv6
+}
+func (p *Endpoint) IsSetIpv6() bool {
+	return p.Ipv6 != nil
+}
+
 func (p *Endpoint) Read(iprot thrift.TProtocol) error {
 	if _, err := iprot.ReadStructBegin(); err != nil {
 		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
@@ -150,6 +162,10 @@ func (p *Endpoint) Read(iprot thrift.TProtocol) error {
 			if err := p.readField3(iprot); err != nil {
 				return err
 			}
+		case 4:
+			if err := p.readField4(iprot); err != nil {
+				return err
+			}
 		default:
 			if err := iprot.Skip(fieldTypeId); err != nil {
 				return err
@@ -192,6 +208,15 @@ func (p *Endpoint) readField3(iprot thrift.TProtocol) error {
 	return nil
 }
 
+func (p *Endpoint) readField4(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadBinary(); err != nil {
+		return thrift.PrependError("error reading field 4: ", err)
+	} else {
+		p.Ipv6 = v
+	}
+	return nil
+}
+
 func (p *Endpoint) Write(oprot thrift.TProtocol) error {
 	if err := oprot.WriteStructBegin("Endpoint"); err != nil {
 		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
@@ -205,6 +230,9 @@ func (p *Endpoint) Write(oprot thrift.TProtocol) error {
 	if err := p.writeField3(oprot); err != nil {
 		return err
 	}
+	if err := p.writeField4(oprot); err != nil {
+		return err
+	}
 	if err := oprot.WriteFieldStop(); err != nil {
 		return thrift.PrependError("write field stop error: ", err)
 	}
@@ -253,6 +281,21 @@ func (p *Endpoint) writeField3(oprot thrift.TProtocol) (err error) {
 	return err
 }
 
+func (p *Endpoint) writeField4(oprot thrift.TProtocol) (err error) {
+	if p.IsSetIpv6() {
+		if err := oprot.WriteFieldBegin("ipv6", thrift.STRING, 4); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:ipv6: ", p), err)
+		}
+		if err := oprot.WriteBinary(p.Ipv6); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.ipv6 (4) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 4:ipv6: ", p), err)
+		}
+	}
+	return err
+}
+
 func (p *Endpoint) String() string {
 	if p == nil {
 		return "<nil>"
@@ -707,6 +750,8 @@ func (p *BinaryAnnotation) String() string {
 // this field non-atomically is implementation-specific.
 //
 // This field is i64 vs i32 to support spans longer than 35 minutes.
+//  - TraceIDHigh: Optional unique 8-byte additional identifier for a trace. If non zero, this
+// means the trace uses 128 bit traceIds instead of 64 bit.
 type Span struct {
 	TraceID int64 `thrift:"trace_id,1" json:"trace_id"`
 	// unused field # 2
@@ -719,6 +764,7 @@ type Span struct {
 	Debug             bool                `thrift:"debug,9" json:"debug,omitempty"`
 	Timestamp         *int64              `thrift:"timestamp,10" json:"timestamp,omitempty"`
 	Duration          *int64              `thrift:"duration,11" json:"duration,omitempty"`
+	TraceIDHigh       *int64              `thrift:"trace_id_high,12" json:"trace_id_high,omitempty"`
 }
 
 func NewSpan() *Span {
@@ -777,6 +823,15 @@ func (p *Span) GetDuration() int64 {
 	}
 	return *p.Duration
 }
+
+var Span_TraceIDHigh_DEFAULT int64
+
+func (p *Span) GetTraceIDHigh() int64 {
+	if !p.IsSetTraceIDHigh() {
+		return Span_TraceIDHigh_DEFAULT
+	}
+	return *p.TraceIDHigh
+}
 func (p *Span) IsSetParentID() bool {
 	return p.ParentID != nil
 }
@@ -793,6 +848,10 @@ func (p *Span) IsSetDuration() bool {
 	return p.Duration != nil
 }
 
+func (p *Span) IsSetTraceIDHigh() bool {
+	return p.TraceIDHigh != nil
+}
+
 func (p *Span) Read(iprot thrift.TProtocol) error {
 	if _, err := iprot.ReadStructBegin(); err != nil {
 		return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
@@ -843,6 +902,10 @@ func (p *Span) Read(iprot thrift.TProtocol) error {
 			if err := p.readField11(iprot); err != nil {
 				return err
 			}
+		case 12:
+			if err := p.readField12(iprot); err != nil {
+				return err
+			}
 		default:
 			if err := iprot.Skip(fieldTypeId); err != nil {
 				return err
@@ -961,6 +1024,15 @@ func (p *Span) readField11(iprot thrift.TProtocol) error {
 	return nil
 }
 
+func (p *Span) readField12(iprot thrift.TProtocol) error {
+	if v, err := iprot.ReadI64(); err != nil {
+		return thrift.PrependError("error reading field 12: ", err)
+	} else {
+		p.TraceIDHigh = &v
+	}
+	return nil
+}
+
 func (p *Span) Write(oprot thrift.TProtocol) error {
 	if err := oprot.WriteStructBegin("Span"); err != nil {
 		return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err)
@@ -992,6 +1064,9 @@ func (p *Span) Write(oprot thrift.TProtocol) error {
 	if err := p.writeField11(oprot); err != nil {
 		return err
 	}
+	if err := p.writeField12(oprot); err != nil {
+		return err
+	}
 	if err := oprot.WriteFieldStop(); err != nil {
 		return thrift.PrependError("write field stop error: ", err)
 	}
@@ -1142,6 +1217,21 @@ func (p *Span) writeField11(oprot thrift.TProtocol) (err error) {
 	return err
 }
 
+func (p *Span) writeField12(oprot thrift.TProtocol) (err error) {
+	if p.IsSetTraceIDHigh() {
+		if err := oprot.WriteFieldBegin("trace_id_high", thrift.I64, 12); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field begin error 12:trace_id_high: ", p), err)
+		}
+		if err := oprot.WriteI64(int64(*p.TraceIDHigh)); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T.trace_id_high (12) field write error: ", p), err)
+		}
+		if err := oprot.WriteFieldEnd(); err != nil {
+			return thrift.PrependError(fmt.Sprintf("%T write field end error 12:trace_id_high: ", p), err)
+		}
+	}
+	return err
+}
+
 func (p *Span) String() string {
 	if p == nil {
 		return "<nil>"
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer.go b/vendor/github.com/uber/jaeger-client-go/tracer.go
index 2c29ae8c9..d87fb10be 100644
--- a/vendor/github.com/uber/jaeger-client-go/tracer.go
+++ b/vendor/github.com/uber/jaeger-client-go/tracer.go
@@ -97,13 +97,13 @@ func NewTracer(
 	}
 
 	// register default injectors/extractors unless they are already provided via options
-	textPropagator := newTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
+	textPropagator := NewTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
 	t.addCodec(opentracing.TextMap, textPropagator, textPropagator)
 
-	httpHeaderPropagator := newHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
+	httpHeaderPropagator := NewHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
 	t.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
 
-	binaryPropagator := newBinaryPropagator(t)
+	binaryPropagator := NewBinaryPropagator(t)
 	t.addCodec(opentracing.Binary, binaryPropagator, binaryPropagator)
 
 	// TODO remove after TChannel supports OpenTracing
@@ -319,7 +319,11 @@ func (t *Tracer) Extract(
 	carrier interface{},
 ) (opentracing.SpanContext, error) {
 	if extractor, ok := t.extractors[format]; ok {
-		return extractor.Extract(carrier)
+		spanCtx, err := extractor.Extract(carrier)
+		if err != nil {
+			return nil, err // ensure returned spanCtx is nil
+		}
+		return spanCtx, nil
 	}
 	return nil, opentracing.ErrUnsupportedFormat
 }
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer_options.go b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
index a90265f03..b4176cc72 100644
--- a/vendor/github.com/uber/jaeger-client-go/tracer_options.go
+++ b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
@@ -51,10 +51,10 @@ func (tracerOptions) CustomHeaderKeys(headerKeys *HeadersConfig) TracerOption {
 		if headerKeys == nil {
 			return
 		}
-		textPropagator := newTextMapPropagator(headerKeys.applyDefaults(), tracer.metrics)
+		textPropagator := NewTextMapPropagator(headerKeys.ApplyDefaults(), tracer.metrics)
 		tracer.addCodec(opentracing.TextMap, textPropagator, textPropagator)
 
-		httpHeaderPropagator := newHTTPHeaderPropagator(headerKeys.applyDefaults(), tracer.metrics)
+		httpHeaderPropagator := NewHTTPHeaderPropagator(headerKeys.ApplyDefaults(), tracer.metrics)
 		tracer.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
 	}
 }
diff --git a/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
index dce58b433..eb31c4369 100644
--- a/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
+++ b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
@@ -48,13 +48,19 @@ func BuildZipkinThrift(s *Span) *z.Span {
 	if parentID != 0 {
 		ptrParentID = &parentID
 	}
+	traceIDHigh := int64(span.context.traceID.High)
+	var ptrTraceIDHigh *int64
+	if traceIDHigh != 0 {
+		ptrTraceIDHigh = &traceIDHigh
+	}
 	timestamp := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
 	duration := span.duration.Nanoseconds() / int64(time.Microsecond)
 	endpoint := &z.Endpoint{
 		ServiceName: span.tracer.serviceName,
 		Ipv4:        int32(span.tracer.hostIPv4)}
 	thriftSpan := &z.Span{
-		TraceID:           int64(span.context.traceID.Low), // TODO upgrade zipkin thrift and use TraceIdHigh
+		TraceID:           int64(span.context.traceID.Low),
+		TraceIDHigh:       ptrTraceIDHigh,
 		ID:                int64(span.context.spanID),
 		ParentID:          ptrParentID,
 		Name:              span.operationName,
diff --git a/vendor/github.com/ulikunitz/xz/TODO.md b/vendor/github.com/ulikunitz/xz/TODO.md
index c10e51b9a..1be3bb845 100644
--- a/vendor/github.com/ulikunitz/xz/TODO.md
+++ b/vendor/github.com/ulikunitz/xz/TODO.md
@@ -86,6 +86,10 @@
 
 ## Log
 
+### 2019-02-20
+
+Release v0.5.6 supports the go.mod file.
+
 ### 2018-10-28
 
 Release v0.5.5 fixes issues #19 observing ErrLimit outputs.
diff --git a/vendor/github.com/ulikunitz/xz/go.mod b/vendor/github.com/ulikunitz/xz/go.mod
new file mode 100644
index 000000000..9e5eea2c9
--- /dev/null
+++ b/vendor/github.com/ulikunitz/xz/go.mod
@@ -0,0 +1 @@
+module github.com/ulikunitz/xz
diff --git a/vendor/github.com/vbauerster/mpb/.travis.yml b/vendor/github.com/vbauerster/mpb/.travis.yml
index a7fd7763a..c982d1f90 100644
--- a/vendor/github.com/vbauerster/mpb/.travis.yml
+++ b/vendor/github.com/vbauerster/mpb/.travis.yml
@@ -1,8 +1,8 @@
 language: go
 sudo: false
 go:
-  - 1.8.x
-  - 1.9.x
+  - 1.10.x
+  - tip
 
 before_install:
   - go get -t -v ./...
diff --git a/vendor/github.com/vbauerster/mpb/README.md b/vendor/github.com/vbauerster/mpb/README.md
index 9b760647e..f96857c47 100644
--- a/vendor/github.com/vbauerster/mpb/README.md
+++ b/vendor/github.com/vbauerster/mpb/README.md
@@ -31,8 +31,6 @@ _Note:_ it is preferable to go get from github.com, rather than gopkg.in. See is
     p := mpb.New(
         // override default (80) width
         mpb.WithWidth(64),
-        // override default "[=>-]" format
-        mpb.WithFormat("╢▌▌░╟"),
         // override default 120ms refresh rate
         mpb.WithRefreshRate(180*time.Millisecond),
     )
@@ -41,6 +39,8 @@ _Note:_ it is preferable to go get from github.com, rather than gopkg.in. See is
     name := "Single Bar:"
     // adding a single bar
     bar := p.AddBar(int64(total),
+        // override default "[=>-]" style
+        mpb.BarStyle("╢▌▌░╟"),
         mpb.PrependDecorators(
             // display our name with one space on the right
             decor.Name(name, decor.WC{W: len(name) + 1, C: decor.DidentRight}),
diff --git a/vendor/github.com/vbauerster/mpb/bar.go b/vendor/github.com/vbauerster/mpb/bar.go
index 5a506fc84..a304a87cb 100644
--- a/vendor/github.com/vbauerster/mpb/bar.go
+++ b/vendor/github.com/vbauerster/mpb/bar.go
@@ -2,6 +2,7 @@ package mpb
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -11,21 +12,8 @@ import (
 	"unicode/utf8"
 
 	"github.com/vbauerster/mpb/decor"
-	"github.com/vbauerster/mpb/internal"
 )
 
-const (
-	rLeft = iota
-	rFill
-	rTip
-	rEmpty
-	rRight
-)
-
-const formatLen = 5
-
-type barRunes [formatLen]rune
-
 // Bar represents a progress Bar
 type Bar struct {
 	priority int
@@ -45,15 +33,30 @@ type Bar struct {
 	shutdown chan struct{}
 }
 
+// Filler interface.
+// Bar renders by calling Filler's Fill method. You can literally have
+// any bar kind, by implementing this interface and passing it to the
+// Add method.
+type Filler interface {
+	Fill(w io.Writer, width int, s *decor.Statistics)
+}
+
+// FillerFunc is function type adapter to convert function into Filler.
+type FillerFunc func(w io.Writer, width int, stat *decor.Statistics)
+
+func (f FillerFunc) Fill(w io.Writer, width int, stat *decor.Statistics) {
+	f(w, width, stat)
+}
+
 type (
 	bState struct {
+		filler             Filler
 		id                 int
 		width              int
+		alignment          int
 		total              int64
 		current            int64
-		runes              barRunes
-		trimLeftSpace      bool
-		trimRightSpace     bool
+		trimSpace          bool
 		toComplete         bool
 		removeOnComplete   bool
 		barClearOnComplete bool
@@ -73,8 +76,8 @@ type (
 		runningBar *Bar
 	}
 	refill struct {
-		char rune
-		till int64
+		r     rune
+		limit int64
 	}
 	frameReader struct {
 		io.Reader
@@ -84,14 +87,20 @@ type (
 	}
 )
 
-func newBar(wg *sync.WaitGroup, id int, total int64, cancel <-chan struct{}, options ...BarOption) *Bar {
-	if total <= 0 {
-		total = time.Now().Unix()
-	}
+func newBar(
+	ctx context.Context,
+	wg *sync.WaitGroup,
+	filler Filler,
+	id, width int,
+	total int64,
+	options ...BarOption,
+) *Bar {
 
 	s := &bState{
+		filler:   filler,
 		id:       id,
 		priority: id,
+		width:    width,
 		total:    total,
 	}
 
@@ -104,6 +113,9 @@ func newBar(wg *sync.WaitGroup, id int, total int64, cancel <-chan struct{}, opt
 	s.bufP = bytes.NewBuffer(make([]byte, 0, s.width))
 	s.bufB = bytes.NewBuffer(make([]byte, 0, s.width))
 	s.bufA = bytes.NewBuffer(make([]byte, 0, s.width))
+	if s.newLineExtendFn != nil {
+		s.bufNL = bytes.NewBuffer(make([]byte, 0, s.width))
+	}
 
 	b := &Bar{
 		priority:      s.priority,
@@ -121,11 +133,7 @@ func newBar(wg *sync.WaitGroup, id int, total int64, cancel <-chan struct{}, opt
 		b.priority = b.runningBar.priority
 	}
 
-	if s.newLineExtendFn != nil {
-		s.bufNL = bytes.NewBuffer(make([]byte, 0, s.width))
-	}
-
-	go b.serve(wg, s, cancel)
+	go b.serve(ctx, wg, s)
 	return b
 }
 
@@ -178,52 +186,42 @@ func (b *Bar) Current() int64 {
 }
 
 // SetTotal sets total dynamically.
-// Set final to true, when total is known, it will trigger bar complete event.
-func (b *Bar) SetTotal(total int64, final bool) bool {
+// Set complete to true, to trigger bar complete event now.
+func (b *Bar) SetTotal(total int64, complete bool) {
 	select {
 	case b.operateState <- func(s *bState) {
-		if total > 0 {
-			s.total = total
-		}
-		if final {
+		s.total = total
+		if complete && !s.toComplete {
 			s.current = s.total
 			s.toComplete = true
 		}
 	}:
-		return true
 	case <-b.done:
-		return false
 	}
 }
 
-// SetRefill sets fill rune to r, up until n.
-func (b *Bar) SetRefill(n int, r rune) {
-	if n <= 0 {
-		return
-	}
+// SetRefill sets refill, if supported by underlying Filler.
+func (b *Bar) SetRefill(amount int64) {
 	b.operateState <- func(s *bState) {
-		s.refill = &refill{r, int64(n)}
+		if f, ok := s.filler.(interface{ SetRefill(int64) }); ok {
+			f.SetRefill(amount)
+		}
 	}
 }
 
-// RefillBy is deprecated, use SetRefill
-func (b *Bar) RefillBy(n int, r rune) {
-	b.SetRefill(n, r)
-}
-
 // Increment is a shorthand for b.IncrBy(1).
 func (b *Bar) Increment() {
 	b.IncrBy(1)
 }
 
 // IncrBy increments progress bar by amount of n.
-// wdd is optional work duration i.e. time.Since(start),
-// which expected to be provided, if any ewma based decorator is used.
+// wdd is optional work duration i.e. time.Since(start), which expected
+// to be provided, if any ewma based decorator is used.
 func (b *Bar) IncrBy(n int, wdd ...time.Duration) {
 	select {
 	case b.operateState <- func(s *bState) {
 		s.current += int64(n)
-		if s.current >= s.total {
+		if s.total > 0 && s.current >= s.total {
 			s.current = s.total
 			s.toComplete = true
 		}
@@ -238,9 +236,9 @@ func (b *Bar) IncrBy(n int, wdd ...time.Duration) {
 // Completed reports whether the bar is in completed state.
 func (b *Bar) Completed() bool {
 	// omit select here, because primary usage of the method is for loop
-	// condition, like 	for !bar.Completed() {...}
-	// so when toComplete=true it is called once (at which time, the bar is still alive),
-	// then quits the loop and never suppose to be called afterwards.
+	// condition, like for !bar.Completed() {...} so when toComplete=true
+	// it is called once (at which time, the bar is still alive), then
+	// quits the loop and never suppose to be called afterwards.
 	return <-b.boolCh
 }
 
@@ -253,8 +251,9 @@ func (b *Bar) wSyncTable() [][]chan int {
 	}
 }
 
-func (b *Bar) serve(wg *sync.WaitGroup, s *bState, cancel <-chan struct{}) {
+func (b *Bar) serve(ctx context.Context, wg *sync.WaitGroup, s *bState) {
 	defer wg.Done()
+	cancel := ctx.Done()
 	for {
 		select {
 		case op := <-b.operateState:
@@ -322,8 +321,6 @@ func (b *Bar) render(debugOut io.Writer, tw int) {
 }
 
 func (s *bState) draw(termWidth int) io.Reader {
-	defer s.bufA.WriteByte('\n')
-
 	if s.panicMsg != "" {
 		return strings.NewReader(fmt.Sprintf(fmt.Sprintf("%%.%ds\n", termWidth), s.panicMsg))
 	}
@@ -338,77 +335,32 @@ func (s *bState) draw(termWidth int) io.Reader {
 		s.bufA.WriteString(d.Decor(stat))
 	}
 
-	prependCount := utf8.RuneCount(s.bufP.Bytes())
-	appendCount := utf8.RuneCount(s.bufA.Bytes())
-
 	if s.barClearOnComplete && s.completeFlushed {
+		s.bufA.WriteByte('\n')
 		return io.MultiReader(s.bufP, s.bufA)
 	}
 
-	s.fillBar(s.width)
-	barCount := utf8.RuneCount(s.bufB.Bytes())
-	totalCount := prependCount + barCount + appendCount
-	if spaceCount := 0; totalCount > termWidth {
-		if !s.trimLeftSpace {
-			spaceCount++
-		}
-		if !s.trimRightSpace {
-			spaceCount++
-		}
-		s.fillBar(termWidth - prependCount - appendCount - spaceCount)
-	}
-
-	return io.MultiReader(s.bufP, s.bufB, s.bufA)
-}
-
-func (s *bState) fillBar(width int) {
-	defer func() {
-		s.bufB.WriteRune(s.runes[rRight])
-		if !s.trimRightSpace {
-			s.bufB.WriteByte(' ')
-		}
-	}()
+	prependCount := utf8.RuneCount(s.bufP.Bytes())
+	appendCount := utf8.RuneCount(s.bufA.Bytes())
 
-	s.bufB.Reset()
-	if !s.trimLeftSpace {
+	if !s.trimSpace {
+		// reserve space for edge spaces
+		termWidth -= 2
 		s.bufB.WriteByte(' ')
 	}
-	s.bufB.WriteRune(s.runes[rLeft])
-	if width <= 2 {
-		return
-	}
-
-	// bar s.width without leftEnd and rightEnd runes
-	barWidth := width - 2
-
-	completedWidth := internal.Percentage(s.total, s.current, int64(barWidth))
 
-	if s.refill != nil {
-		till := internal.Percentage(s.total, s.refill.till, int64(barWidth))
-		// append refill rune
-		var i int64
-		for i = 0; i < till; i++ {
-			s.bufB.WriteRune(s.refill.char)
-		}
-		for i = till; i < completedWidth; i++ {
-			s.bufB.WriteRune(s.runes[rFill])
-		}
+	if prependCount+s.width+appendCount > termWidth {
+		s.filler.Fill(s.bufB, termWidth-prependCount-appendCount, stat)
 	} else {
-		var i int64
-		for i = 0; i < completedWidth; i++ {
-			s.bufB.WriteRune(s.runes[rFill])
-		}
+		s.filler.Fill(s.bufB, s.width, stat)
 	}
 
-	if completedWidth < int64(barWidth) && completedWidth > 0 {
-		_, size := utf8.DecodeLastRune(s.bufB.Bytes())
-		s.bufB.Truncate(s.bufB.Len() - size)
-		s.bufB.WriteRune(s.runes[rTip])
+	if !s.trimSpace {
+		s.bufB.WriteByte(' ')
 	}
 
-	for i := completedWidth; i < int64(barWidth); i++ {
-		s.bufB.WriteRune(s.runes[rEmpty])
-	}
+	s.bufA.WriteByte('\n')
+	return io.MultiReader(s.bufP, s.bufB, s.bufA)
 }
 
 func (s *bState) wSyncTable() [][]chan int {
@@ -442,14 +394,6 @@ func newStatistics(s *bState) *decor.Statistics {
 	}
 }
 
-func strToBarRunes(format string) (array barRunes) {
-	for i, n := 0, 0; len(format) > 0; i++ {
-		array[i], n = utf8.DecodeRuneInString(format)
-		format = format[n:]
-	}
-	return
-}
-
 func countLines(b []byte) int {
 	return bytes.Count(b, []byte("\n"))
 }
diff --git a/vendor/github.com/vbauerster/mpb/bar_filler.go b/vendor/github.com/vbauerster/mpb/bar_filler.go
new file mode 100644
index 000000000..4e9285ca5
--- /dev/null
+++ b/vendor/github.com/vbauerster/mpb/bar_filler.go
@@ -0,0 +1,111 @@
+package mpb
+
+import (
+	"io"
+	"unicode/utf8"
+
+	"github.com/vbauerster/mpb/decor"
+	"github.com/vbauerster/mpb/internal"
+)
+
+const (
+	rLeft = iota
+	rFill
+	rTip
+	rEmpty
+	rRight
+	rRevTip
+	rRefill
+)
+
+var defaultBarStyle = "[=>-]<+"
+
+type barFiller struct {
+	format       [][]byte
+	refillAmount int64
+	reverse      bool
+}
+
+func newDefaultBarFiller() Filler {
+	bf := &barFiller{
+		format: make([][]byte, utf8.RuneCountInString(defaultBarStyle)),
+	}
+	bf.setStyle(defaultBarStyle)
+	return bf
+}
+
+func (s *barFiller) setStyle(style string) {
+	if !utf8.ValidString(style) {
+		return
+	}
+	src := make([][]byte, 0, utf8.RuneCountInString(style))
+	for _, r := range style {
+		src = append(src, []byte(string(r)))
+	}
+	copy(s.format, src)
+}
+
+func (s *barFiller) setReverse() {
+	s.reverse = true
+}
+
+func (s *barFiller) SetRefill(amount int64) {
+	s.refillAmount = amount
+}
+
+func (s *barFiller) Fill(w io.Writer, width int, stat *decor.Statistics) {
+
+	// don't count rLeft and rRight [brackets]
+	width -= 2
+	if width < 2 {
+		return
+	}
+
+	w.Write(s.format[rLeft])
+	if width == 2 {
+		w.Write(s.format[rRight])
+		return
+	}
+
+	bb := make([][]byte, width)
+
+	cwidth := int(internal.Percentage(stat.Total, stat.Current, int64(width)))
+
+	for i := 0; i < cwidth; i++ {
+		bb[i] = s.format[rFill]
+	}
+
+	if s.refillAmount > 0 {
+		var rwidth int
+		if s.refillAmount > stat.Current {
+			rwidth = cwidth
+		} else {
+			rwidth = int(internal.Percentage(stat.Total, int64(s.refillAmount), int64(width)))
+		}
+		for i := 0; i < rwidth; i++ {
+			bb[i] = s.format[rRefill]
+		}
+	}
+
+	if cwidth > 0 && cwidth < width {
+		bb[cwidth-1] = s.format[rTip]
+	}
+
+	for i := cwidth; i < width; i++ {
+		bb[i] = s.format[rEmpty]
+	}
+
+	if s.reverse {
+		if cwidth > 0 && cwidth < width {
+			bb[cwidth-1] = s.format[rRevTip]
+		}
+		for i := len(bb) - 1; i >= 0; i-- {
+			w.Write(bb[i])
+		}
+	} else {
+		for i := 0; i < len(bb); i++ {
+			w.Write(bb[i])
+		}
+	}
+	w.Write(s.format[rRight])
+}
diff --git a/vendor/github.com/vbauerster/mpb/bar_option.go b/vendor/github.com/vbauerster/mpb/bar_option.go
index e33bce4da..e9a4bd2a7 100644
--- a/vendor/github.com/vbauerster/mpb/bar_option.go
+++ b/vendor/github.com/vbauerster/mpb/bar_option.go
@@ -6,11 +6,10 @@ import (
 	"github.com/vbauerster/mpb/decor"
 )
 
-// BarOption is a function option which changes the default behavior of a bar,
-// if passed to p.AddBar(int64, ...BarOption)
+// BarOption is a function option which changes the default behavior of a bar.
 type BarOption func(*bState)
 
-// AppendDecorators let you inject decorators to the bar's right side
+// AppendDecorators let you inject decorators to the bar's right side.
 func AppendDecorators(appenders ...decor.Decorator) BarOption {
 	return func(s *bState) {
 		for _, decorator := range appenders {
@@ -25,7 +24,7 @@ func AppendDecorators(appenders ...decor.Decorator) BarOption {
 	}
 }
 
-// PrependDecorators let you inject decorators to the bar's left side
+// PrependDecorators let you inject decorators to the bar's left side.
 func PrependDecorators(prependers ...decor.Decorator) BarOption {
 	return func(s *bState) {
 		for _, decorator := range prependers {
@@ -40,85 +39,155 @@ func PrependDecorators(prependers ...decor.Decorator) BarOption {
 	}
 }
 
-// BarTrimLeft trims left side space of the bar
-func BarTrimLeft() BarOption {
-	return func(s *bState) {
-		s.trimLeftSpace = true
-	}
-}
-
-// BarTrimRight trims right space of the bar
-func BarTrimRight() BarOption {
-	return func(s *bState) {
-		s.trimRightSpace = true
-	}
-}
-
-// BarTrim trims both left and right spaces of the bar
-func BarTrim() BarOption {
+// BarID sets bar id.
+func BarID(id int) BarOption {
 	return func(s *bState) {
-		s.trimLeftSpace = true
-		s.trimRightSpace = true
+		s.id = id
 	}
 }
 
-// BarID overwrites internal bar id
-func BarID(id int) BarOption {
+// BarWidth sets bar width independent of the container.
+func BarWidth(width int) BarOption {
 	return func(s *bState) {
-		s.id = id
+		s.width = width
 	}
 }
 
-// BarRemoveOnComplete is a flag, if set whole bar line will be removed on complete event.
-// If both BarRemoveOnComplete and BarClearOnComplete are set, first bar section gets cleared
-// and then whole bar line gets removed completely.
+// BarRemoveOnComplete is a flag, if set whole bar line will be removed
+// on complete event. If both BarRemoveOnComplete and BarClearOnComplete
+// are set, first bar section gets cleared and then whole bar line
+// gets removed completely.
 func BarRemoveOnComplete() BarOption {
 	return func(s *bState) {
 		s.removeOnComplete = true
 	}
 }
 
-// BarReplaceOnComplete is indicator for delayed bar start, after the `runningBar` is complete.
-// To achieve bar replacement effect, `runningBar` should has its `BarRemoveOnComplete` option set.
+// BarReplaceOnComplete is indicator for delayed bar start, after the
+// `runningBar` is complete. To achieve bar replacement effect,
+// `runningBar` should has its `BarRemoveOnComplete` option set.
 func BarReplaceOnComplete(runningBar *Bar) BarOption {
+	return BarParkTo(runningBar)
+}
+
+// BarParkTo same as BarReplaceOnComplete
+func BarParkTo(runningBar *Bar) BarOption {
 	return func(s *bState) {
 		s.runningBar = runningBar
 	}
 }
 
-// BarClearOnComplete is a flag, if set will clear bar section on complete event.
-// If you need to remove a whole bar line, refer to BarRemoveOnComplete.
+// BarClearOnComplete is a flag, if set will clear bar section on
+// complete event. If you need to remove a whole bar line, refer to
+// BarRemoveOnComplete.
 func BarClearOnComplete() BarOption {
 	return func(s *bState) {
 		s.barClearOnComplete = true
 	}
 }
 
-// BarPriority sets bar's priority.
-// Zero is highest priority, i.e. bar will be on top.
-// If `BarReplaceOnComplete` option is supplied, this option is ignored.
+// BarPriority sets bar's priority. Zero is highest priority, i.e. bar
+// will be on top. If `BarReplaceOnComplete` option is supplied, this
+// option is ignored.
 func BarPriority(priority int) BarOption {
 	return func(s *bState) {
 		s.priority = priority
 	}
 }
 
-// BarNewLineExtend takes user defined efn, which gets called each render cycle.
-// Any write to provided writer of efn, will appear on new line of respective bar.
+// BarNewLineExtend takes user defined efn, which gets called each
+// render cycle. Any write to provided writer of efn, will appear on
+// new line of respective bar.
 func BarNewLineExtend(efn func(io.Writer, *decor.Statistics)) BarOption {
 	return func(s *bState) {
 		s.newLineExtendFn = efn
 	}
 }
 
-func barWidth(w int) BarOption {
+// TrimSpace trims bar's edge spaces.
+func TrimSpace() BarOption {
 	return func(s *bState) {
-		s.width = w
+		s.trimSpace = true
+	}
+}
+
+// BarStyle sets custom bar style, default one is "[=>-]<+".
+//
+//	'[' left bracket rune
+//
+//	'=' fill rune
+//
+//	'>' tip rune
+//
+//	'-' empty rune
+//
+//	']' right bracket rune
+//
+//	'<' reverse tip rune, used when BarReverse option is set
+//
+//	'+' refill rune, used when *Bar.SetRefill(int64) is called
+//
+// It's ok to provide first five runes only, for example mpb.BarStyle("╢▌▌░╟")
+func BarStyle(style string) BarOption {
+	chk := func(filler Filler) (interface{}, bool) {
+		if style == "" {
+			return nil, false
+		}
+		t, ok := filler.(*barFiller)
+		return t, ok
+	}
+	cb := func(t interface{}) {
+		t.(*barFiller).setStyle(style)
+	}
+	return MakeFillerTypeSpecificBarOption(chk, cb)
+}
+
+// BarReverse reverse mode, bar will progress from right to left.
+func BarReverse() BarOption {
+	chk := func(filler Filler) (interface{}, bool) {
+		t, ok := filler.(*barFiller)
+		return t, ok
+	}
+	cb := func(t interface{}) {
+		t.(*barFiller).setReverse()
+	}
+	return MakeFillerTypeSpecificBarOption(chk, cb)
+}
+
+// SpinnerStyle sets custom spinner style.
+// Effective when Filler type is spinner.
+func SpinnerStyle(frames []string) BarOption {
+	chk := func(filler Filler) (interface{}, bool) {
+		if len(frames) == 0 {
+			return nil, false
+		}
+		t, ok := filler.(*spinnerFiller)
+		return t, ok
+	}
+	cb := func(t interface{}) {
+		t.(*spinnerFiller).frames = frames
 	}
+	return MakeFillerTypeSpecificBarOption(chk, cb)
 }
 
-func barFormat(format string) BarOption {
+// MakeFillerTypeSpecificBarOption makes BarOption specific to Filler's
+// actual type. If you implement your own Filler, so most probably
+// you'll need this. See BarStyle or SpinnerStyle for example.
+func MakeFillerTypeSpecificBarOption(
+	typeChecker func(Filler) (interface{}, bool),
+	cb func(interface{}),
+) BarOption {
 	return func(s *bState) {
-		s.runes = strToBarRunes(format)
+		if t, ok := typeChecker(s.filler); ok {
+			cb(t)
+		}
+	}
+}
+
+// OptionOnCondition returns option when condition evaluates to true.
+func OptionOnCondition(option BarOption, condition func() bool) BarOption {
+	if condition() {
+		return option
 	}
+	return nil
 }
diff --git a/vendor/github.com/vbauerster/mpb/cwriter/writer.go b/vendor/github.com/vbauerster/mpb/cwriter/writer.go
index 0b1470d4c..638237c18 100644
--- a/vendor/github.com/vbauerster/mpb/cwriter/writer.go
+++ b/vendor/github.com/vbauerster/mpb/cwriter/writer.go
@@ -22,8 +22,8 @@ var (
 	clearCursorAndLine = cursorUp + clearLine
 )
 
-// Writer is a buffered the writer that updates the terminal.
-// The contents of writer will be flushed when Flush is called.
+// Writer is a buffered the writer that updates the terminal.  The
+// contents of writer will be flushed when Flush is called.
 type Writer struct {
 	out        io.Writer
 	buf        bytes.Buffer
@@ -64,11 +64,13 @@ func (w *Writer) WriteString(s string) (n int, err error) {
 	return w.buf.WriteString(s)
 }
 
-// ReadFrom reads from the provided io.Reader and writes to the underlying buffer.
+// ReadFrom reads from the provided io.Reader and writes to the
+// underlying buffer.
 func (w *Writer) ReadFrom(r io.Reader) (n int64, err error) {
 	return w.buf.ReadFrom(r)
 }
 
+// GetWidth returns width of underlying terminal.
 func (w *Writer) GetWidth() (int, error) {
 	if w.isTerminal {
 		tw, _, err := terminal.GetSize(w.fd)
diff --git a/vendor/github.com/vbauerster/mpb/cwriter/writer_windows.go b/vendor/github.com/vbauerster/mpb/cwriter/writer_windows.go
index dad7f50b2..747a63484 100644
--- a/vendor/github.com/vbauerster/mpb/cwriter/writer_windows.go
+++ b/vendor/github.com/vbauerster/mpb/cwriter/writer_windows.go
@@ -8,7 +8,7 @@ import (
 	"syscall"
 	"unsafe"
 
-	"github.com/mattn/go-isatty"
+	isatty "github.com/mattn/go-isatty"
 )
 
 var kernel32 = syscall.NewLazyDLL("kernel32.dll")
diff --git a/vendor/github.com/vbauerster/mpb/decor/counters.go b/vendor/github.com/vbauerster/mpb/decor/counters.go
index e4161dc4b..7d581eefb 100644
--- a/vendor/github.com/vbauerster/mpb/decor/counters.go
+++ b/vendor/github.com/vbauerster/mpb/decor/counters.go
@@ -141,12 +141,14 @@ func CountersNoUnit(pairFormat string, wcc ...WC) Decorator {
 	return Counters(0, pairFormat, wcc...)
 }
 
-// CountersKibiByte is a wrapper around Counters with predefined unit UnitKiB (bytes/1024).
+// CountersKibiByte is a wrapper around Counters with predefined unit
+// UnitKiB (bytes/1024).
 func CountersKibiByte(pairFormat string, wcc ...WC) Decorator {
 	return Counters(UnitKiB, pairFormat, wcc...)
 }
 
-// CountersKiloByte is a wrapper around Counters with predefined unit UnitKB (bytes/1000).
+// CountersKiloByte is a wrapper around Counters with predefined unit
+// UnitKB (bytes/1000).
 func CountersKiloByte(pairFormat string, wcc ...WC) Decorator {
 	return Counters(UnitKB, pairFormat, wcc...)
 }
diff --git a/vendor/github.com/vbauerster/mpb/decor/decorator.go b/vendor/github.com/vbauerster/mpb/decor/decorator.go
index 6aaf6c830..2fe40aea6 100644
--- a/vendor/github.com/vbauerster/mpb/decor/decorator.go
+++ b/vendor/github.com/vbauerster/mpb/decor/decorator.go
@@ -31,8 +31,12 @@ const (
 	DSyncSpaceR = DSyncWidth | DextraSpace | DidentRight
 )
 
+// TimeStyle enum.
+type TimeStyle int
+
+// TimeStyle kinds.
 const (
-	ET_STYLE_GO = iota
+	ET_STYLE_GO TimeStyle = iota
 	ET_STYLE_HHMMSS
 	ET_STYLE_HHMM
 	ET_STYLE_MMSS
@@ -47,35 +51,37 @@ type Statistics struct {
 }
 
 // Decorator interface.
-// A decorator must implement this interface, in order to be used with mpb library.
+// A decorator must implement this interface, in order to be used with
+// mpb library.
 type Decorator interface {
 	Decor(*Statistics) string
 	Syncable
 }
 
 // Syncable interface.
-// All decorators implement this interface implicitly.
-// Its Syncable method exposes width sync channel, if sync is enabled.
+// All decorators implement this interface implicitly. Its Syncable
+// method exposes width sync channel, if sync is enabled.
 type Syncable interface {
 	Syncable() (bool, chan int)
 }
 
 // OnCompleteMessenger interface.
-// Decorators implementing this interface suppose to return provided string on complete event.
+// Decorators implementing this interface suppose to return provided
+// string on complete event.
 type OnCompleteMessenger interface {
 	OnCompleteMessage(string)
 }
 
 // AmountReceiver interface.
-// If decorator needs to receive increment amount,
-// so this is the right interface to implement.
+// If decorator needs to receive increment amount, so this is the right
+// interface to implement.
 type AmountReceiver interface {
 	NextAmount(int, ...time.Duration)
 }
 
 // ShutdownListener interface.
-// If decorator needs to be notified once upon bar shutdown event,
-// so this is the right interface to implement.
+// If decorator needs to be notified once upon bar shutdown event, so
+// this is the right interface to implement.
 type ShutdownListener interface {
 	Shutdown()
 }
@@ -90,6 +96,7 @@ var (
 
 // WC is a struct with two public fields W and C, both of int type.
 // W represents width and C represents bit set of width related config.
+// A decorator should embed WC, in order to become Syncable.
 type WC struct {
 	W      int
 	C      int
@@ -126,12 +133,13 @@ func (wc *WC) Init() {
 	}
 }
 
+// Syncable is implementation of Syncable interface.
 func (wc *WC) Syncable() (bool, chan int) {
 	return (wc.C & DSyncWidth) != 0, wc.wsync
 }
 
-// OnComplete returns decorator, which wraps provided decorator, with sole
-// purpose to display provided message on complete event.
+// OnComplete returns decorator, which wraps provided decorator, with
+// sole purpose to display provided message on complete event.
 //
 //	`decorator` Decorator to wrap
 //
diff --git a/vendor/github.com/vbauerster/mpb/decor/elapsed.go b/vendor/github.com/vbauerster/mpb/decor/elapsed.go
index 649d40a30..b2e75852c 100644
--- a/vendor/github.com/vbauerster/mpb/decor/elapsed.go
+++ b/vendor/github.com/vbauerster/mpb/decor/elapsed.go
@@ -10,7 +10,7 @@ import (
 //	`style` one of [ET_STYLE_GO|ET_STYLE_HHMMSS|ET_STYLE_HHMM|ET_STYLE_MMSS]
 //
 //	`wcc` optional WC config
-func Elapsed(style int, wcc ...WC) Decorator {
+func Elapsed(style TimeStyle, wcc ...WC) Decorator {
 	var wc WC
 	for _, widthConf := range wcc {
 		wc = widthConf
@@ -26,7 +26,7 @@ func Elapsed(style int, wcc ...WC) Decorator {
 
 type elapsedDecorator struct {
 	WC
-	style       int
+	style       TimeStyle
 	startTime   time.Time
 	msg         string
 	completeMsg *string
diff --git a/vendor/github.com/vbauerster/mpb/decor/eta.go b/vendor/github.com/vbauerster/mpb/decor/eta.go
index 44a1f03ea..e8dc979b4 100644
--- a/vendor/github.com/vbauerster/mpb/decor/eta.go
+++ b/vendor/github.com/vbauerster/mpb/decor/eta.go
@@ -6,7 +6,6 @@ import (
 	"time"
 
 	"github.com/VividCortex/ewma"
-	"github.com/vbauerster/mpb/internal"
 )
 
 type TimeNormalizer func(time.Duration) time.Duration
@@ -18,7 +17,7 @@ type TimeNormalizer func(time.Duration) time.Duration
 //	`age` is the previous N samples to average over.
 //
 //	`wcc` optional WC config
-func EwmaETA(style int, age float64, wcc ...WC) Decorator {
+func EwmaETA(style TimeStyle, age float64, wcc ...WC) Decorator {
 	return MovingAverageETA(style, ewma.NewMovingAverage(age), NopNormalizer(), wcc...)
 }
 
@@ -31,7 +30,7 @@ func EwmaETA(style int, age float64, wcc ...WC) Decorator {
 //	`normalizer` available implementations are [NopNormalizer|FixedIntervalTimeNormalizer|MaxTolerateTimeNormalizer]
 //
 //	`wcc` optional WC config
-func MovingAverageETA(style int, average MovingAverage, normalizer TimeNormalizer, wcc ...WC) Decorator {
+func MovingAverageETA(style TimeStyle, average MovingAverage, normalizer TimeNormalizer, wcc ...WC) Decorator {
 	var wc WC
 	for _, widthConf := range wcc {
 		wc = widthConf
@@ -48,7 +47,7 @@ func MovingAverageETA(style int, average MovingAverage, normalizer TimeNormalize
 
 type movingAverageETA struct {
 	WC
-	style       int
+	style       TimeStyle
 	average     ewma.MovingAverage
 	completeMsg *string
 	normalizer  TimeNormalizer
@@ -59,7 +58,7 @@ func (d *movingAverageETA) Decor(st *Statistics) string {
 		return d.FormatMsg(*d.completeMsg)
 	}
 
-	v := internal.Round(d.average.Value())
+	v := math.Round(d.average.Value())
 	remaining := d.normalizer(time.Duration((st.Total - st.Current) * int64(v)))
 	hours := int64((remaining / time.Hour) % 60)
 	minutes := int64((remaining / time.Minute) % 60)
@@ -105,7 +104,7 @@ func (d *movingAverageETA) OnCompleteMessage(msg string) {
 //	`style` one of [ET_STYLE_GO|ET_STYLE_HHMMSS|ET_STYLE_HHMM|ET_STYLE_MMSS]
 //
 //	`wcc` optional WC config
-func AverageETA(style int, wcc ...WC) Decorator {
+func AverageETA(style TimeStyle, wcc ...WC) Decorator {
 	var wc WC
 	for _, widthConf := range wcc {
 		wc = widthConf
@@ -121,7 +120,7 @@ func AverageETA(style int, wcc ...WC) Decorator {
 
 type averageETA struct {
 	WC
-	style       int
+	style       TimeStyle
 	startTime   time.Time
 	completeMsg *string
 }
@@ -133,7 +132,7 @@ func (d *averageETA) Decor(st *Statistics) string {
 
 	var str string
 	timeElapsed := time.Since(d.startTime)
-	v := internal.Round(float64(timeElapsed) / float64(st.Current))
+	v := math.Round(float64(timeElapsed) / float64(st.Current))
 	if math.IsInf(v, 0) || math.IsNaN(v) {
 		v = 0
 	}
diff --git a/vendor/github.com/vbauerster/mpb/decor/moving-average.go b/vendor/github.com/vbauerster/mpb/decor/moving-average.go
index f9596a27f..fcd268923 100644
--- a/vendor/github.com/vbauerster/mpb/decor/moving-average.go
+++ b/vendor/github.com/vbauerster/mpb/decor/moving-average.go
@@ -6,9 +6,9 @@ import (
 	"github.com/VividCortex/ewma"
 )
 
-// MovingAverage is the interface that computes a moving average over a time-
-// series stream of numbers. The average may be over a window or exponentially
-// decaying.
+// MovingAverage is the interface that computes a moving average over
+// a time-series stream of numbers. The average may be over a window
+// or exponentially decaying.
 type MovingAverage interface {
 	Add(float64)
 	Value() float64
@@ -57,7 +57,8 @@ func (s *medianEwma) Add(v float64) {
 	s.count++
 }
 
-// NewMedianEwma is ewma based MovingAverage, which gets its values from median MovingAverage.
+// NewMedianEwma is ewma based MovingAverage, which gets its values
+// from median MovingAverage.
 func NewMedianEwma(age ...float64) MovingAverage {
 	return &medianEwma{
 		MovingAverage: ewma.NewMovingAverage(age...),
diff --git a/vendor/github.com/vbauerster/mpb/decor/speed.go b/vendor/github.com/vbauerster/mpb/decor/speed.go
index 395e5d04d..74658ce41 100644
--- a/vendor/github.com/vbauerster/mpb/decor/speed.go
+++ b/vendor/github.com/vbauerster/mpb/decor/speed.go
@@ -137,7 +137,8 @@ func EwmaSpeed(unit int, unitFormat string, age float64, wcc ...WC) Decorator {
 	return MovingAverageSpeed(unit, unitFormat, ewma.NewMovingAverage(age), wcc...)
 }
 
-// MovingAverageSpeed decorator relies on MovingAverage implementation to calculate its average.
+// MovingAverageSpeed decorator relies on MovingAverage implementation
+// to calculate its average.
 //
 //	`unit` one of [0|UnitKiB|UnitKB] zero for no unit
 //
diff --git a/vendor/github.com/vbauerster/mpb/internal/percentage.go b/vendor/github.com/vbauerster/mpb/internal/percentage.go
index 3c8defb7d..0483d2598 100644
--- a/vendor/github.com/vbauerster/mpb/internal/percentage.go
+++ b/vendor/github.com/vbauerster/mpb/internal/percentage.go
@@ -1,10 +1,12 @@
 package internal
 
+import "math"
+
 // Percentage is a helper function, to calculate percentage.
 func Percentage(total, current, width int64) int64 {
 	if total <= 0 {
 		return 0
 	}
 	p := float64(width*current) / float64(total)
-	return int64(Round(p))
+	return int64(math.Round(p))
 }
diff --git a/vendor/github.com/vbauerster/mpb/internal/round.go b/vendor/github.com/vbauerster/mpb/internal/round.go
deleted file mode 100644
index c54a789d2..000000000
--- a/vendor/github.com/vbauerster/mpb/internal/round.go
+++ /dev/null
@@ -1,49 +0,0 @@
-package internal
-
-import "math"
-
-const (
-	uvone    = 0x3FF0000000000000
-	mask     = 0x7FF
-	shift    = 64 - 11 - 1
-	bias     = 1023
-	signMask = 1 << 63
-	fracMask = 1<<shift - 1
-)
-
-// Round returns the nearest integer, rounding half away from zero.
-//
-// Special cases are:
-//	Round(±0) = ±0
-//	Round(±Inf) = ±Inf
-//	Round(NaN) = NaN
-func Round(x float64) float64 {
-	// Round is a faster implementation of:
-	//
-	// func Round(x float64) float64 {
-	//   t := Trunc(x)
-	//   if Abs(x-t) >= 0.5 {
-	//     return t + Copysign(1, x)
-	//   }
-	//   return t
-	// }
-	bits := math.Float64bits(x)
-	e := uint(bits>>shift) & mask
-	if e < bias {
-		// Round abs(x) < 1 including denormals.
-		bits &= signMask // +-0
-		if e == bias-1 {
-			bits |= uvone // +-1
-		}
-	} else if e < bias+shift {
-		// Round any abs(x) >= 1 containing a fractional component [0,1).
-		//
-		// Numbers with larger exponents are returned unchanged since they
-		// must be either an integer, infinity, or NaN.
-		const half = 1 << (shift - 1)
-		e -= bias
-		bits += half >> e
-		bits &^= fracMask >> e
-	}
-	return math.Float64frombits(bits)
-}
diff --git a/vendor/github.com/vbauerster/mpb/options.go b/vendor/github.com/vbauerster/mpb/options.go
index 05d2ecf1f..44a6ee3f3 100644
--- a/vendor/github.com/vbauerster/mpb/options.go
+++ b/vendor/github.com/vbauerster/mpb/options.go
@@ -1,29 +1,30 @@
 package mpb
 
 import (
+	"context"
 	"io"
 	"sync"
 	"time"
-	"unicode/utf8"
 
 	"github.com/vbauerster/mpb/cwriter"
 )
 
-// ProgressOption is a function option which changes the default behavior of
-// progress pool, if passed to mpb.New(...ProgressOption)
+// ProgressOption is a function option which changes the default
+// behavior of progress pool, if passed to mpb.New(...ProgressOption).
 type ProgressOption func(*pState)
 
-// WithWaitGroup provides means to have a single joint point.
-// If *sync.WaitGroup is provided, you can safely call just p.Wait()
-// without calling Wait() on provided *sync.WaitGroup.
-// Makes sense when there are more than one bar to render.
+// WithWaitGroup provides means to have a single joint point. If
+// *sync.WaitGroup is provided, you can safely call just p.Wait()
+// without calling Wait() on provided *sync.WaitGroup. Makes sense
+// when there are more than one bar to render.
 func WithWaitGroup(wg *sync.WaitGroup) ProgressOption {
 	return func(s *pState) {
 		s.uwg = wg
 	}
 }
 
-// WithWidth overrides default width 80
+// WithWidth sets container width. Default is 80. Bars inherit this
+// width, as long as no BarWidth is applied.
 func WithWidth(w int) ProgressOption {
 	return func(s *pState) {
 		if w >= 0 {
@@ -32,16 +33,7 @@ func WithWidth(w int) ProgressOption {
 	}
 }
 
-// WithFormat overrides default bar format "[=>-]"
-func WithFormat(format string) ProgressOption {
-	return func(s *pState) {
-		if utf8.RuneCountInString(format) == formatLen {
-			s.format = format
-		}
-	}
-}
-
-// WithRefreshRate overrides default 120ms refresh rate
+// WithRefreshRate overrides default 120ms refresh rate.
 func WithRefreshRate(d time.Duration) ProgressOption {
 	return func(s *pState) {
 		if d < 10*time.Millisecond {
@@ -59,22 +51,25 @@ func WithManualRefresh(ch <-chan time.Time) ProgressOption {
 	}
 }
 
-// WithCancel provide your cancel channel,
-// which you plan to close at some point.
-func WithCancel(ch <-chan struct{}) ProgressOption {
+// WithContext provided context will be used for cancellation purposes.
+func WithContext(ctx context.Context) ProgressOption {
 	return func(s *pState) {
-		s.cancel = ch
+		if ctx == nil {
+			return
+		}
+		s.ctx = ctx
 	}
 }
 
-// WithShutdownNotifier provided chanel will be closed, after all bars have been rendered.
+// WithShutdownNotifier provided chanel will be closed, after all bars
+// have been rendered.
 func WithShutdownNotifier(ch chan struct{}) ProgressOption {
 	return func(s *pState) {
 		s.shutdownNotifier = ch
 	}
 }
 
-// WithOutput overrides default output os.Stdout
+// WithOutput overrides default output os.Stdout.
 func WithOutput(w io.Writer) ProgressOption {
 	return func(s *pState) {
 		if w == nil {
diff --git a/vendor/github.com/vbauerster/mpb/options_go1.7.go b/vendor/github.com/vbauerster/mpb/options_go1.7.go
deleted file mode 100644
index ca9a5bad8..000000000
--- a/vendor/github.com/vbauerster/mpb/options_go1.7.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//+build go1.7
-
-package mpb
-
-import "context"
-
-// WithContext provided context will be used for cancellation purposes
-func WithContext(ctx context.Context) ProgressOption {
-	return func(s *pState) {
-		if ctx == nil {
-			panic("ctx must not be nil")
-		}
-		s.cancel = ctx.Done()
-	}
-}
diff --git a/vendor/github.com/vbauerster/mpb/progress.go b/vendor/github.com/vbauerster/mpb/progress.go
index d95fe45b7..f9e25af79 100644
--- a/vendor/github.com/vbauerster/mpb/progress.go
+++ b/vendor/github.com/vbauerster/mpb/progress.go
@@ -2,6 +2,7 @@ package mpb
 
 import (
 	"container/heap"
+	"context"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -17,8 +18,6 @@ const (
 	prr = 120 * time.Millisecond
 	// default width
 	pwidth = 80
-	// default format
-	pformat = "[=>-]"
 )
 
 // Progress represents the container that renders Progress bars
@@ -42,24 +41,24 @@ type pState struct {
 	pMatrix         map[int][]chan int
 	aMatrix         map[int][]chan int
 
-	// following are provided by user
+	// following are provided/overrided by user
+	ctx              context.Context
 	uwg              *sync.WaitGroup
 	manualRefreshCh  <-chan time.Time
-	cancel           <-chan struct{}
 	shutdownNotifier chan struct{}
 	waitBars         map[*Bar]*Bar
 	debugOut         io.Writer
 }
 
-// New creates new Progress instance, which orchestrates bars rendering process.
-// Accepts mpb.ProgressOption funcs for customization.
+// New creates new Progress instance, which orchestrates bars rendering
+// process. Accepts mpb.ProgressOption funcs for customization.
 func New(options ...ProgressOption) *Progress {
 	pq := make(priorityQueue, 0)
 	heap.Init(&pq)
 	s := &pState{
+		ctx:      context.Background(),
 		bHeap:    &pq,
 		width:    pwidth,
-		format:   pformat,
 		cw:       cwriter.New(os.Stdout),
 		rr:       prr,
 		waitBars: make(map[*Bar]*Bar),
@@ -84,12 +83,28 @@ func New(options ...ProgressOption) *Progress {
 
 // AddBar creates a new progress bar and adds to the container.
 func (p *Progress) AddBar(total int64, options ...BarOption) *Bar {
+	return p.Add(total, newDefaultBarFiller(), options...)
+}
+
+// AddSpinner creates a new spinner bar and adds to the container.
+func (p *Progress) AddSpinner(total int64, alignment SpinnerAlignment, options ...BarOption) *Bar {
+	filler := &spinnerFiller{
+		frames:    defaultSpinnerStyle,
+		alignment: alignment,
+	}
+	return p.Add(total, filler, options...)
+}
+
+// Add creates a bar which renders itself by provided filler.
+func (p *Progress) Add(total int64, filler Filler, options ...BarOption) *Bar {
+	if filler == nil {
+		filler = newDefaultBarFiller()
+	}
 	p.wg.Add(1)
 	result := make(chan *Bar)
 	select {
 	case p.operateState <- func(s *pState) {
-		options = append(options, barWidth(s.width), barFormat(s.format))
-		b := newBar(p.wg, s.idCounter, total, s.cancel, options...)
+		b := newBar(s.ctx, p.wg, filler, s.idCounter, s.width, total, options...)
 		if b.runningBar != nil {
 			s.waitBars[b.runningBar] = b
 		} else {
@@ -106,10 +121,10 @@ func (p *Progress) AddBar(total int64, options ...BarOption) *Bar {
 	}
 }
 
-// Abort is only effective while bar progress is running,
-// it means remove bar now without waiting for its completion.
-// If bar is already completed, there is nothing to abort.
-// If you need to remove bar after completion, use BarRemoveOnComplete BarOption.
+// Abort is only effective while bar progress is running, it means
+// remove bar now without waiting for its completion. If bar is already
+// completed, there is nothing to abort. If you need to remove bar
+// after completion, use BarRemoveOnComplete BarOption.
 func (p *Progress) Abort(b *Bar, remove bool) {
 	select {
 	case p.operateState <- func(s *pState) {
@@ -145,9 +160,10 @@ func (p *Progress) BarCount() int {
 	}
 }
 
-// Wait first waits for user provided *sync.WaitGroup, if any,
-// then waits far all bars to complete and finally shutdowns master goroutine.
-// After this method has been called, there is no way to reuse *Progress instance.
+// Wait first waits for user provided *sync.WaitGroup, if any, then
+// waits far all bars to complete and finally shutdowns master goroutine.
+// After this method has been called, there is no way to reuse *Progress
+// instance.
 func (p *Progress) Wait() {
 	if p.uwg != nil {
 		p.uwg.Wait()
@@ -205,8 +221,8 @@ func (s *pState) flush(lineCount int) error {
 		defer func() {
 			if frameReader.toShutdown {
 				// shutdown at next flush, in other words decrement underlying WaitGroup
-				// only after the bar with completed state has been flushed.
-				// this ensures no bar ends up with less than 100% rendered.
+				// only after the bar with completed state has been flushed. this
+				// ensures no bar ends up with less than 100% rendered.
 				s.shutdownPending = append(s.shutdownPending, bar)
 				if replacementBar, ok := s.waitBars[bar]; ok {
 					heap.Push(s.bHeap, replacementBar)
diff --git a/vendor/github.com/vbauerster/mpb/spinner_filler.go b/vendor/github.com/vbauerster/mpb/spinner_filler.go
new file mode 100644
index 000000000..36299fef0
--- /dev/null
+++ b/vendor/github.com/vbauerster/mpb/spinner_filler.go
@@ -0,0 +1,48 @@
+package mpb
+
+import (
+	"io"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/vbauerster/mpb/decor"
+)
+
+// SpinnerAlignment enum.
+type SpinnerAlignment int
+
+// SpinnerAlignment kinds.
+const (
+	SpinnerOnLeft SpinnerAlignment = iota
+	SpinnerOnMiddle
+	SpinnerOnRight
+)
+
+var defaultSpinnerStyle = []string{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}
+
+type spinnerFiller struct {
+	frames    []string
+	count     uint
+	alignment SpinnerAlignment
+}
+
+func (s *spinnerFiller) Fill(w io.Writer, width int, stat *decor.Statistics) {
+
+	frame := s.frames[s.count%uint(len(s.frames))]
+	frameWidth := utf8.RuneCountInString(frame)
+
+	if width < frameWidth {
+		return
+	}
+
+	switch rest := width - frameWidth; s.alignment {
+	case SpinnerOnLeft:
+		io.WriteString(w, frame+strings.Repeat(" ", rest))
+	case SpinnerOnMiddle:
+		str := strings.Repeat(" ", rest/2) + frame + strings.Repeat(" ", rest/2+rest%2)
+		io.WriteString(w, str)
+	case SpinnerOnRight:
+		io.WriteString(w, strings.Repeat(" ", rest)+frame)
+	}
+	s.count++
+}