vendor buildah, image, storage, cni

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

12 files changed, 296 insertions, 143 deletions

diff --git a/vendor/github.com/containernetworking/cni/README.md b/vendor/github.com/containernetworking/cni/README.md
index 65ccda9f9..3968d908a 100644
--- a/vendor/github.com/containernetworking/cni/README.md
+++ b/vendor/github.com/containernetworking/cni/README.md
@@ -9,9 +9,9 @@
 
 # Community Sync Meeting
 
-There is a community sync meeting for users and developers every 1-2 months. The next meeting will help on a Google Hangout and the link is in the [agenda](https://docs.google.com/document/d/10ECyT2mBGewsJUcmYmS8QNo1AcNgy2ZIe2xS7lShYhE/edit?usp=sharing) (Notes from previous meeting are also in this doc). 
+There is a community sync meeting for users and developers every 1-2 months. The next meeting will help on a Google Hangout and the link is in the [agenda](https://docs.google.com/document/d/10ECyT2mBGewsJUcmYmS8QNo1AcNgy2ZIe2xS7lShYhE/edit?usp=sharing) (Notes from previous meeting are also in this doc).
 
-The next meeting will be held on *Wednesday, October 4th* at *3:00pm UTC / 11:00am EDT / 8:00am PDT* [Add to Calendar](https://www.worldtimebuddy.com/?qm=1&lid=100,5,2643743,5391959&h=100&date=2017-10-04&sln=15-16).
+The next meeting will be held on *Wednesday, January 30th, 2019* at *4:00pm UTC / 11:00am EDT / 8:00am PDT* [Add to Calendar](https://www.worldtimebuddy.com/?qm=1&lid=100,5,2643743,5391959&h=100&date=2019-01-30&sln=16-17).
 
 ---
 
@@ -38,11 +38,13 @@ To avoid duplication, we think it is prudent to define a common interface betwee
 ## Who is using CNI?
 ### Container runtimes
 - [rkt - container engine](https://coreos.com/blog/rkt-cni-networking.html)
-- [Kubernetes - a system to simplify container operations](http://kubernetes.io/docs/admin/network-plugins/)
+- [Kubernetes - a system to simplify container operations](https://kubernetes.io/docs/admin/network-plugins/)
 - [OpenShift - Kubernetes with additional enterprise features](https://github.com/openshift/origin/blob/master/docs/openshift_networking_requirements.md)
 - [Cloud Foundry - a platform for cloud applications](https://github.com/cloudfoundry-incubator/cf-networking-release)
 - [Apache Mesos - a distributed systems kernel](https://github.com/apache/mesos/blob/master/docs/cni.md)
 - [Amazon ECS - a highly scalable, high performance container management service](https://aws.amazon.com/ecs/)
+- [Singularity - container platform optimized for HPC, EPC, and AI](https://github.com/sylabs/singularity)
+- [OpenSVC - orchestrator for legacy and containerized application stacks](https://docs.opensvc.com/latest/fr/agent.configure.cni.html)
 
 ### 3rd party plugins
 - [Project Calico - a layer 3 virtual network](https://github.com/projectcalico/calico-cni)
@@ -61,6 +63,10 @@ To avoid duplication, we think it is prudent to define a common interface betwee
 - [Amazon ECS CNI Plugins - a collection of CNI Plugins to configure containers with Amazon EC2 elastic network interfaces (ENIs)](https://github.com/aws/amazon-ecs-cni-plugins)
 - [Bonding CNI - a Link aggregating plugin to address failover and high availability network](https://github.com/Intel-Corp/bond-cni)
 - [ovn-kubernetes - an container network plugin built on Open vSwitch (OVS) and Open Virtual Networking (OVN) with support for both Linux and Windows](https://github.com/openvswitch/ovn-kubernetes)
+- [Juniper Contrail](https://www.juniper.net/cloud) / [TungstenFabric](https://tungstenfabric.io) -  Provides overlay SDN solution, delivering multicloud networking, hybrid cloud networking, simultaneous overlay-underlay support, network policy enforcement, network isolation, service chaining and flexible load balancing
+- [Knitter - a CNI plugin supporting multiple networking for Kubernetes](https://github.com/ZTE/Knitter)
+- [DANM - a CNI-compliant networking solution for TelCo workloads running on Kubernetes](https://github.com/nokia/danm)
+- [VMware NSX – a CNI plugin that enables automated NSX L2/L3 networking and L4/L7 Load Balancing; network isolation at the pod, node, and cluster level; and zero-trust security policy for your Kubernetes cluster.](https://docs.vmware.com/en/VMware-NSX-T/2.2/com.vmware.nsxt.ncp_kubernetes.doc/GUID-6AFA724E-BB62-4693-B95C-321E8DDEA7E1.html)
 
 The CNI team also maintains some [core plugins in a separate repository](https://github.com/containernetworking/plugins).
 
@@ -74,7 +80,7 @@ If you intend to contribute to code or documentation, please read [CONTRIBUTING.
 
 ### Requirements
 
-The CNI spec is language agnostic.  To use the Go language libraries in this repository, you'll need a recent version of Go.  Our [automated tests](https://travis-ci.org/containernetworking/cni/builds) cover Go versions 1.7 and 1.8.
+The CNI spec is language agnostic.  To use the Go language libraries in this repository, you'll need a recent version of Go.  You can find the Go versions covered by our [automated tests](https://travis-ci.org/containernetworking/cni/builds) in [.travis.yaml](.travis.yml).
 
 ### Reference Plugins
 
@@ -111,6 +117,7 @@ EOF
 $ cat >/etc/cni/net.d/99-loopback.conf <<EOF
 {
 	"cniVersion": "0.2.0",
+	"name": "lo",
 	"type": "loopback"
 }
 EOF
@@ -122,7 +129,7 @@ Next, build the plugins:
 
 ```bash
 $ cd $GOPATH/src/github.com/containernetworking/plugins
-$ ./build.sh
+$ ./build_linux.sh # or build_windows.sh
 ```
 
 Finally, execute a command (`ifconfig` in this example) in a private network namespace that has joined the `mynet` network:
diff --git a/vendor/github.com/containernetworking/cni/libcni/api.go b/vendor/github.com/containernetworking/cni/libcni/api.go
index d494e43d4..360733e74 100644
--- a/vendor/github.com/containernetworking/cni/libcni/api.go
+++ b/vendor/github.com/containernetworking/cni/libcni/api.go
@@ -15,6 +15,7 @@
 package libcni
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -57,20 +58,25 @@ type NetworkConfig struct {
 }
 
 type NetworkConfigList struct {
-	Name       string
-	CNIVersion string
-	Plugins    []*NetworkConfig
-	Bytes      []byte
+	Name         string
+	CNIVersion   string
+	DisableCheck bool
+	Plugins      []*NetworkConfig
+	Bytes        []byte
 }
 
 type CNI interface {
-	AddNetworkList(net *NetworkConfigList, rt *RuntimeConf) (types.Result, error)
-	GetNetworkList(net *NetworkConfigList, rt *RuntimeConf) (types.Result, error)
-	DelNetworkList(net *NetworkConfigList, rt *RuntimeConf) error
+	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
 
-	AddNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
-	GetNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
-	DelNetwork(net *NetworkConfig, rt *RuntimeConf) error
+	AddNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
+	CheckNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) error
+	DelNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) error
+	GetNetworkCachedResult(net *NetworkConfig, rt *RuntimeConf) (types.Result, error)
+
+	ValidateNetworkList(ctx context.Context, net *NetworkConfigList) ([]string, error)
+	ValidateNetwork(ctx context.Context, net *NetworkConfig) ([]string, error)
 }
 
 type CNIConfig struct {
@@ -120,7 +126,7 @@ func buildOneConfig(name, cniVersion string, orig *NetworkConfig, prevResult typ
 // These capabilities arguments are filtered through the plugin's advertised
 // capabilities from its config JSON, and any keys in the CapabilityArgs
 // matching plugin capabilities are added to the "runtimeConfig" dictionary
-// sent to the plugin via JSON on stdin.  For exmaple, if the plugin's
+// sent to the plugin via JSON on stdin.  For example, if the plugin's
 // capabilities include "portMappings", and the CapabilityArgs map includes a
 // "portMappings" key, that key and its value are added to the "runtimeConfig"
 // dictionary to be passed to the plugin's stdin.
@@ -158,40 +164,12 @@ func (c *CNIConfig) ensureExec() invoke.Exec {
 	return c.exec
 }
 
-func (c *CNIConfig) addOrGetNetwork(command, name, cniVersion string, net *NetworkConfig, prevResult types.Result, rt *RuntimeConf) (types.Result, error) {
-	c.ensureExec()
-	pluginPath, err := c.exec.FindInPath(net.Network.Type, c.Path)
-	if err != nil {
-		return nil, err
-	}
-
-	newConf, err := buildOneConfig(name, cniVersion, net, prevResult, rt)
-	if err != nil {
-		return nil, err
-	}
-
-	return invoke.ExecPluginWithResult(pluginPath, newConf.Bytes, c.args(command, rt), c.exec)
-}
-
-// Note that only GET requests should pass an initial prevResult
-func (c *CNIConfig) addOrGetNetworkList(command string, prevResult types.Result, list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) {
-	var err error
-	for _, net := range list.Plugins {
-		prevResult, err = c.addOrGetNetwork(command, list.Name, list.CNIVersion, net, prevResult, rt)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return prevResult, nil
-}
-
 func getResultCacheFilePath(netName string, rt *RuntimeConf) string {
 	cacheDir := rt.CacheDir
 	if cacheDir == "" {
 		cacheDir = CacheDir
 	}
-	return filepath.Join(cacheDir, "results", fmt.Sprintf("%s-%s", netName, rt.ContainerID))
+	return filepath.Join(cacheDir, "results", fmt.Sprintf("%s-%s-%s", netName, rt.ContainerID, rt.IfName))
 }
 
 func setCachedResult(result types.Result, netName string, rt *RuntimeConf) error {
@@ -243,37 +221,94 @@ func getCachedResult(netName, cniVersion string, rt *RuntimeConf) (types.Result,
 	return result, err
 }
 
-// AddNetworkList executes a sequence of plugins with the ADD command
-func (c *CNIConfig) AddNetworkList(list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) {
-	result, err := c.addOrGetNetworkList("ADD", nil, list, rt)
+// GetNetworkListCachedResult returns the cached Result of the previous
+// previous AddNetworkList() operation for a network list, or an error.
+func (c *CNIConfig) GetNetworkListCachedResult(list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) {
+	return getCachedResult(list.Name, list.CNIVersion, rt)
+}
+
+// GetNetworkCachedResult returns the cached Result of the previous
+// previous AddNetwork() operation for a network, or an error.
+func (c *CNIConfig) GetNetworkCachedResult(net *NetworkConfig, rt *RuntimeConf) (types.Result, error) {
+	return getCachedResult(net.Network.Name, net.Network.CNIVersion, rt)
+}
+
+func (c *CNIConfig) addNetwork(ctx context.Context, name, cniVersion string, net *NetworkConfig, prevResult types.Result, rt *RuntimeConf) (types.Result, error) {
+	c.ensureExec()
+	pluginPath, err := c.exec.FindInPath(net.Network.Type, c.Path)
 	if err != nil {
 		return nil, err
 	}
 
+	newConf, err := buildOneConfig(name, cniVersion, net, prevResult, rt)
+	if err != nil {
+		return nil, err
+	}
+
+	return invoke.ExecPluginWithResult(ctx, pluginPath, newConf.Bytes, c.args("ADD", rt), c.exec)
+}
+
+// AddNetworkList executes a sequence of plugins with the ADD command
+func (c *CNIConfig) AddNetworkList(ctx context.Context, list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) {
+	var err error
+	var result types.Result
+	for _, net := range list.Plugins {
+		result, err = c.addNetwork(ctx, list.Name, list.CNIVersion, net, result, rt)
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	if err = setCachedResult(result, list.Name, rt); err != nil {
-		return nil, fmt.Errorf("failed to set network '%s' cached result: %v", list.Name, err)
+		return nil, fmt.Errorf("failed to set network %q cached result: %v", list.Name, err)
 	}
 
 	return result, nil
 }
 
-// GetNetworkList executes a sequence of plugins with the GET command
-func (c *CNIConfig) GetNetworkList(list *NetworkConfigList, rt *RuntimeConf) (types.Result, error) {
-	// GET was added in CNI spec version 0.4.0 and higher
+func (c *CNIConfig) checkNetwork(ctx context.Context, name, cniVersion string, net *NetworkConfig, prevResult types.Result, rt *RuntimeConf) error {
+	c.ensureExec()
+	pluginPath, err := c.exec.FindInPath(net.Network.Type, c.Path)
+	if err != nil {
+		return err
+	}
+
+	newConf, err := buildOneConfig(name, cniVersion, net, prevResult, rt)
+	if err != nil {
+		return err
+	}
+
+	return invoke.ExecPluginWithoutResult(ctx, pluginPath, newConf.Bytes, c.args("CHECK", rt), c.exec)
+}
+
+// CheckNetworkList executes a sequence of plugins with the CHECK command
+func (c *CNIConfig) CheckNetworkList(ctx context.Context, list *NetworkConfigList, rt *RuntimeConf) error {
+	// CHECK was added in CNI spec version 0.4.0 and higher
 	if gtet, err := version.GreaterThanOrEqualTo(list.CNIVersion, "0.4.0"); err != nil {
-		return nil, err
+		return err
 	} else if !gtet {
-		return nil, fmt.Errorf("configuration version %q does not support the GET command", list.CNIVersion)
+		return fmt.Errorf("configuration version %q does not support the CHECK command", list.CNIVersion)
+	}
+
+	if list.DisableCheck {
+		return nil
 	}
 
 	cachedResult, err := getCachedResult(list.Name, list.CNIVersion, rt)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get network '%s' cached result: %v", list.Name, err)
+		return fmt.Errorf("failed to get network %q cached result: %v", list.Name, err)
+	}
+
+	for _, net := range list.Plugins {
+		if err := c.checkNetwork(ctx, list.Name, list.CNIVersion, net, cachedResult, rt); err != nil {
+			return err
+		}
 	}
-	return c.addOrGetNetworkList("GET", cachedResult, list, rt)
+
+	return nil
 }
 
-func (c *CNIConfig) delNetwork(name, cniVersion string, net *NetworkConfig, prevResult types.Result, rt *RuntimeConf) error {
+func (c *CNIConfig) delNetwork(ctx context.Context, name, cniVersion string, net *NetworkConfig, prevResult types.Result, rt *RuntimeConf) error {
 	c.ensureExec()
 	pluginPath, err := c.exec.FindInPath(net.Network.Type, c.Path)
 	if err != nil {
@@ -285,11 +320,11 @@ func (c *CNIConfig) delNetwork(name, cniVersion string, net *NetworkConfig, prev
 		return err
 	}
 
-	return invoke.ExecPluginWithoutResult(pluginPath, newConf.Bytes, c.args("DEL", rt), c.exec)
+	return invoke.ExecPluginWithoutResult(ctx, pluginPath, newConf.Bytes, c.args("DEL", rt), c.exec)
 }
 
 // DelNetworkList executes a sequence of plugins with the DEL command
-func (c *CNIConfig) DelNetworkList(list *NetworkConfigList, rt *RuntimeConf) error {
+func (c *CNIConfig) DelNetworkList(ctx context.Context, list *NetworkConfigList, rt *RuntimeConf) error {
 	var cachedResult types.Result
 
 	// Cached result on DEL was added in CNI spec version 0.4.0 and higher
@@ -298,13 +333,13 @@ func (c *CNIConfig) DelNetworkList(list *NetworkConfigList, rt *RuntimeConf) err
 	} else if gtet {
 		cachedResult, err = getCachedResult(list.Name, list.CNIVersion, rt)
 		if err != nil {
-			return fmt.Errorf("failed to get network '%s' cached result: %v", list.Name, err)
+			return fmt.Errorf("failed to get network %q cached result: %v", list.Name, err)
 		}
 	}
 
 	for i := len(list.Plugins) - 1; i >= 0; i-- {
 		net := list.Plugins[i]
-		if err := c.delNetwork(list.Name, list.CNIVersion, net, cachedResult, rt); err != nil {
+		if err := c.delNetwork(ctx, list.Name, list.CNIVersion, net, cachedResult, rt); err != nil {
 			return err
 		}
 	}
@@ -314,37 +349,37 @@ func (c *CNIConfig) DelNetworkList(list *NetworkConfigList, rt *RuntimeConf) err
 }
 
 // AddNetwork executes the plugin with the ADD command
-func (c *CNIConfig) AddNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error) {
-	result, err := c.addOrGetNetwork("ADD", net.Network.Name, net.Network.CNIVersion, net, nil, rt)
+func (c *CNIConfig) AddNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) (types.Result, error) {
+	result, err := c.addNetwork(ctx, net.Network.Name, net.Network.CNIVersion, net, nil, rt)
 	if err != nil {
 		return nil, err
 	}
 
 	if err = setCachedResult(result, net.Network.Name, rt); err != nil {
-		return nil, fmt.Errorf("failed to set network '%s' cached result: %v", net.Network.Name, err)
+		return nil, fmt.Errorf("failed to set network %q cached result: %v", net.Network.Name, err)
 	}
 
 	return result, nil
 }
 
-// GetNetwork executes the plugin with the GET command
-func (c *CNIConfig) GetNetwork(net *NetworkConfig, rt *RuntimeConf) (types.Result, error) {
-	// GET was added in CNI spec version 0.4.0 and higher
+// CheckNetwork executes the plugin with the CHECK command
+func (c *CNIConfig) CheckNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) error {
+	// CHECK was added in CNI spec version 0.4.0 and higher
 	if gtet, err := version.GreaterThanOrEqualTo(net.Network.CNIVersion, "0.4.0"); err != nil {
-		return nil, err
+		return err
 	} else if !gtet {
-		return nil, fmt.Errorf("configuration version %q does not support the GET command", net.Network.CNIVersion)
+		return fmt.Errorf("configuration version %q does not support the CHECK command", net.Network.CNIVersion)
 	}
 
 	cachedResult, err := getCachedResult(net.Network.Name, net.Network.CNIVersion, rt)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get network '%s' cached result: %v", net.Network.Name, err)
+		return fmt.Errorf("failed to get network %q cached result: %v", net.Network.Name, err)
 	}
-	return c.addOrGetNetwork("GET", net.Network.Name, net.Network.CNIVersion, net, cachedResult, rt)
+	return c.checkNetwork(ctx, net.Network.Name, net.Network.CNIVersion, net, cachedResult, rt)
 }
 
 // DelNetwork executes the plugin with the DEL command
-func (c *CNIConfig) DelNetwork(net *NetworkConfig, rt *RuntimeConf) error {
+func (c *CNIConfig) DelNetwork(ctx context.Context, net *NetworkConfig, rt *RuntimeConf) error {
 	var cachedResult types.Result
 
 	// Cached result on DEL was added in CNI spec version 0.4.0 and higher
@@ -353,27 +388,99 @@ func (c *CNIConfig) DelNetwork(net *NetworkConfig, rt *RuntimeConf) error {
 	} else if gtet {
 		cachedResult, err = getCachedResult(net.Network.Name, net.Network.CNIVersion, rt)
 		if err != nil {
-			return fmt.Errorf("failed to get network '%s' cached result: %v", net.Network.Name, err)
+			return fmt.Errorf("failed to get network %q cached result: %v", net.Network.Name, err)
 		}
 	}
 
-	if err := c.delNetwork(net.Network.Name, net.Network.CNIVersion, net, cachedResult, rt); err != nil {
+	if err := c.delNetwork(ctx, net.Network.Name, net.Network.CNIVersion, net, cachedResult, rt); err != nil {
 		return err
 	}
 	_ = delCachedResult(net.Network.Name, rt)
 	return nil
 }
 
+// ValidateNetworkList checks that a configuration is reasonably valid.
+// - all the specified plugins exist on disk
+// - every plugin supports the desired version.
+//
+// Returns a list of all capabilities supported by the configuration, or error
+func (c *CNIConfig) ValidateNetworkList(ctx context.Context, list *NetworkConfigList) ([]string, error) {
+	version := list.CNIVersion
+
+	// holding map for seen caps (in case of duplicates)
+	caps := map[string]interface{}{}
+
+	errs := []error{}
+	for _, net := range list.Plugins {
+		if err := c.validatePlugin(ctx, net.Network.Type, version); err != nil {
+			errs = append(errs, err)
+		}
+		for c, enabled := range net.Network.Capabilities {
+			if !enabled {
+				continue
+			}
+			caps[c] = struct{}{}
+		}
+	}
+
+	if len(errs) > 0 {
+		return nil, fmt.Errorf("%v", errs)
+	}
+
+	// make caps list
+	cc := make([]string, 0, len(caps))
+	for c := range caps {
+		cc = append(cc, c)
+	}
+
+	return cc, nil
+}
+
+// ValidateNetwork checks that a configuration is reasonably valid.
+// It uses the same logic as ValidateNetworkList)
+// Returns a list of capabilities
+func (c *CNIConfig) ValidateNetwork(ctx context.Context, net *NetworkConfig) ([]string, error) {
+	caps := []string{}
+	for c, ok := range net.Network.Capabilities {
+		if ok {
+			caps = append(caps, c)
+		}
+	}
+	if err := c.validatePlugin(ctx, net.Network.Type, net.Network.CNIVersion); err != nil {
+		return nil, err
+	}
+	return caps, nil
+}
+
+// validatePlugin checks that an individual plugin's configuration is sane
+func (c *CNIConfig) validatePlugin(ctx context.Context, pluginName, expectedVersion string) error {
+	pluginPath, err := invoke.FindInPath(pluginName, c.Path)
+	if err != nil {
+		return err
+	}
+
+	vi, err := invoke.GetVersionInfo(ctx, pluginPath, c.exec)
+	if err != nil {
+		return err
+	}
+	for _, vers := range vi.SupportedVersions() {
+		if vers == expectedVersion {
+			return nil
+		}
+	}
+	return fmt.Errorf("plugin %s does not support config version %q", pluginName, expectedVersion)
+}
+
 // GetVersionInfo reports which versions of the CNI spec are supported by
 // the given plugin.
-func (c *CNIConfig) GetVersionInfo(pluginType string) (version.PluginInfo, error) {
+func (c *CNIConfig) GetVersionInfo(ctx context.Context, pluginType string) (version.PluginInfo, error) {
 	c.ensureExec()
 	pluginPath, err := c.exec.FindInPath(pluginType, c.Path)
 	if err != nil {
 		return nil, err
 	}
 
-	return invoke.GetVersionInfo(pluginPath, c.exec)
+	return invoke.GetVersionInfo(ctx, pluginPath, c.exec)
 }
 
 // =====
diff --git a/vendor/github.com/containernetworking/cni/libcni/conf.go b/vendor/github.com/containernetworking/cni/libcni/conf.go
index 9834d715b..ea56c509d 100644
--- a/vendor/github.com/containernetworking/cni/libcni/conf.go
+++ b/vendor/github.com/containernetworking/cni/libcni/conf.go
@@ -83,10 +83,19 @@ func ConfListFromBytes(bytes []byte) (*NetworkConfigList, error) {
 		}
 	}
 
+	disableCheck := false
+	if rawDisableCheck, ok := rawList["disableCheck"]; ok {
+		disableCheck, ok = rawDisableCheck.(bool)
+		if !ok {
+			return nil, fmt.Errorf("error parsing configuration list: invalid disableCheck type %T", rawDisableCheck)
+		}
+	}
+
 	list := &NetworkConfigList{
-		Name:       name,
-		CNIVersion: cniVersion,
-		Bytes:      bytes,
+		Name:         name,
+		DisableCheck: disableCheck,
+		CNIVersion:   cniVersion,
+		Bytes:        bytes,
 	}
 
 	var plugins []interface{}
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go b/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
index 21efdf802..30b4672f1 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/delegate.go
@@ -15,6 +15,7 @@
 package invoke
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -22,54 +23,53 @@ import (
 	"github.com/containernetworking/cni/pkg/types"
 )
 
-func delegateAddOrGet(command, delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
+func delegateCommon(expectedCommand, 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 {
-		return nil, err
+		return "", nil, err
 	}
 
-	return ExecPluginWithResult(pluginPath, netconf, ArgsFromEnv(), exec)
+	return pluginPath, exec, nil
 }
 
 // DelegateAdd calls the given delegate plugin with the CNI ADD action and
 // JSON configuration
-func DelegateAdd(delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
-	if os.Getenv("CNI_COMMAND") != "ADD" {
-		return nil, fmt.Errorf("CNI_COMMAND is not ADD")
+func DelegateAdd(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
+	pluginPath, realExec, err := delegateCommon("ADD", delegatePlugin, exec)
+	if err != nil {
+		return nil, err
 	}
-	return delegateAddOrGet("ADD", delegatePlugin, netconf, exec)
+
+	return ExecPluginWithResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
 }
 
-// DelegateGet calls the given delegate plugin with the CNI GET action and
+// DelegateCheck calls the given delegate plugin with the CNI CHECK action and
 // JSON configuration
-func DelegateGet(delegatePlugin string, netconf []byte, exec Exec) (types.Result, error) {
-	if os.Getenv("CNI_COMMAND") != "GET" {
-		return nil, fmt.Errorf("CNI_COMMAND is not GET")
+func DelegateCheck(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
+	pluginPath, realExec, err := delegateCommon("CHECK", delegatePlugin, exec)
+	if err != nil {
+		return err
 	}
-	return delegateAddOrGet("GET", delegatePlugin, netconf, exec)
+
+	return ExecPluginWithoutResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
 }
 
 // DelegateDel calls the given delegate plugin with the CNI DEL action and
 // JSON configuration
-func DelegateDel(delegatePlugin string, netconf []byte, exec Exec) error {
-	if exec == nil {
-		exec = defaultExec
-	}
-
-	if os.Getenv("CNI_COMMAND") != "DEL" {
-		return fmt.Errorf("CNI_COMMAND is not DEL")
-	}
-
-	paths := filepath.SplitList(os.Getenv("CNI_PATH"))
-	pluginPath, err := exec.FindInPath(delegatePlugin, paths)
+func DelegateDel(ctx context.Context, delegatePlugin string, netconf []byte, exec Exec) error {
+	pluginPath, realExec, err := delegateCommon("DEL", delegatePlugin, exec)
 	if err != nil {
 		return err
 	}
 
-	return ExecPluginWithoutResult(pluginPath, netconf, ArgsFromEnv(), exec)
+	return ExecPluginWithoutResult(ctx, pluginPath, netconf, ArgsFromEnv(), realExec)
 }
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/exec.go b/vendor/github.com/containernetworking/cni/pkg/invoke/exec.go
index cf019d3a0..8e6d30b82 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/exec.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/exec.go
@@ -15,6 +15,7 @@
 package invoke
 
 import (
+	"context"
 	"fmt"
 	"os"
 
@@ -26,7 +27,7 @@ import (
 // and executing a CNI plugin. Tests may provide a fake implementation
 // to avoid writing fake plugins to temporary directories during the test.
 type Exec interface {
-	ExecPlugin(pluginPath string, stdinData []byte, environ []string) ([]byte, error)
+	ExecPlugin(ctx context.Context, pluginPath string, stdinData []byte, environ []string) ([]byte, error)
 	FindInPath(plugin string, paths []string) (string, error)
 	Decode(jsonBytes []byte) (version.PluginInfo, error)
 }
@@ -72,12 +73,12 @@ type Exec interface {
 //	return "", fmt.Errorf("failed to find plugin %s in paths %v", plugin, paths)
 //}
 
-func ExecPluginWithResult(pluginPath string, netconf []byte, args CNIArgs, exec Exec) (types.Result, error) {
+func ExecPluginWithResult(ctx context.Context, pluginPath string, netconf []byte, args CNIArgs, exec Exec) (types.Result, error) {
 	if exec == nil {
 		exec = defaultExec
 	}
 
-	stdoutBytes, err := exec.ExecPlugin(pluginPath, netconf, args.AsEnv())
+	stdoutBytes, err := exec.ExecPlugin(ctx, pluginPath, netconf, args.AsEnv())
 	if err != nil {
 		return nil, err
 	}
@@ -92,11 +93,11 @@ func ExecPluginWithResult(pluginPath string, netconf []byte, args CNIArgs, exec
 	return version.NewResult(confVersion, stdoutBytes)
 }
 
-func ExecPluginWithoutResult(pluginPath string, netconf []byte, args CNIArgs, exec Exec) error {
+func ExecPluginWithoutResult(ctx context.Context, pluginPath string, netconf []byte, args CNIArgs, exec Exec) error {
 	if exec == nil {
 		exec = defaultExec
 	}
-	_, err := exec.ExecPlugin(pluginPath, netconf, args.AsEnv())
+	_, err := exec.ExecPlugin(ctx, pluginPath, netconf, args.AsEnv())
 	return err
 }
 
@@ -104,7 +105,7 @@ func ExecPluginWithoutResult(pluginPath string, netconf []byte, args CNIArgs, ex
 // For recent-enough plugins, it uses the information returned by the VERSION
 // command.  For older plugins which do not recognize that command, it reports
 // version 0.1.0
-func GetVersionInfo(pluginPath string, exec Exec) (version.PluginInfo, error) {
+func GetVersionInfo(ctx context.Context, pluginPath string, exec Exec) (version.PluginInfo, error) {
 	if exec == nil {
 		exec = defaultExec
 	}
@@ -117,7 +118,7 @@ func GetVersionInfo(pluginPath string, exec Exec) (version.PluginInfo, error) {
 		Path:   "dummy",
 	}
 	stdin := []byte(fmt.Sprintf(`{"cniVersion":%q}`, version.Current()))
-	stdoutBytes, err := exec.ExecPlugin(pluginPath, stdin, args.AsEnv())
+	stdoutBytes, err := exec.ExecPlugin(ctx, pluginPath, stdin, args.AsEnv())
 	if err != nil {
 		if err.Error() == "unknown CNI_COMMAND: VERSION" {
 			return version.PluginSupports("0.1.0"), nil
diff --git a/vendor/github.com/containernetworking/cni/pkg/invoke/os_unix.go b/vendor/github.com/containernetworking/cni/pkg/invoke/os_unix.go
index bab5737a9..9bcfb4553 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/os_unix.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/os_unix.go
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// +build darwin dragonfly freebsd linux netbsd opensbd solaris
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package invoke
 
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 a598f09c2..e5b86634d 100644
--- a/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go
+++ b/vendor/github.com/containernetworking/cni/pkg/invoke/raw_exec.go
@@ -16,6 +16,7 @@ package invoke
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -28,17 +29,13 @@ type RawExec struct {
 	Stderr io.Writer
 }
 
-func (e *RawExec) ExecPlugin(pluginPath string, stdinData []byte, environ []string) ([]byte, error) {
+func (e *RawExec) ExecPlugin(ctx context.Context, pluginPath string, stdinData []byte, environ []string) ([]byte, error) {
 	stdout := &bytes.Buffer{}
-
-	c := exec.Cmd{
-		Env:    environ,
-		Path:   pluginPath,
-		Args:   []string{pluginPath},
-		Stdin:  bytes.NewBuffer(stdinData),
-		Stdout: stdout,
-		Stderr: e.Stderr,
-	}
+	c := exec.CommandContext(ctx, pluginPath)
+	c.Env = environ
+	c.Stdin = bytes.NewBuffer(stdinData)
+	c.Stdout = stdout
+	c.Stderr = e.Stderr
 	if err := c.Run(); err != nil {
 		return nil, pluginErr(err, stdout.Bytes())
 	}
diff --git a/vendor/github.com/containernetworking/cni/pkg/types/020/types.go b/vendor/github.com/containernetworking/cni/pkg/types/020/types.go
index 2833aba78..53256167f 100644
--- a/vendor/github.com/containernetworking/cni/pkg/types/020/types.go
+++ b/vendor/github.com/containernetworking/cni/pkg/types/020/types.go
@@ -17,6 +17,7 @@ package types020
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"net"
 	"os"
 
@@ -73,11 +74,15 @@ func (r *Result) GetAsVersion(version string) (types.Result, error) {
 }
 
 func (r *Result) Print() error {
+	return r.PrintTo(os.Stdout)
+}
+
+func (r *Result) PrintTo(writer io.Writer) error {
 	data, err := json.MarshalIndent(r, "", "    ")
 	if err != nil {
 		return err
 	}
-	_, err = os.Stdout.Write(data)
+	_, err = writer.Write(data)
 	return err
 }
 
diff --git a/vendor/github.com/containernetworking/cni/pkg/types/current/types.go b/vendor/github.com/containernetworking/cni/pkg/types/current/types.go
index 92980c1a7..7267a2e6d 100644
--- a/vendor/github.com/containernetworking/cni/pkg/types/current/types.go
+++ b/vendor/github.com/containernetworking/cni/pkg/types/current/types.go
@@ -17,6 +17,7 @@ package current
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"net"
 	"os"
 
@@ -75,13 +76,9 @@ func convertFrom020(result types.Result) (*Result, error) {
 			Gateway: oldResult.IP4.Gateway,
 		})
 		for _, route := range oldResult.IP4.Routes {
-			gw := route.GW
-			if gw == nil {
-				gw = oldResult.IP4.Gateway
-			}
 			newResult.Routes = append(newResult.Routes, &types.Route{
 				Dst: route.Dst,
-				GW:  gw,
+				GW:  route.GW,
 			})
 		}
 	}
@@ -93,21 +90,13 @@ func convertFrom020(result types.Result) (*Result, error) {
 			Gateway: oldResult.IP6.Gateway,
 		})
 		for _, route := range oldResult.IP6.Routes {
-			gw := route.GW
-			if gw == nil {
-				gw = oldResult.IP6.Gateway
-			}
 			newResult.Routes = append(newResult.Routes, &types.Route{
 				Dst: route.Dst,
-				GW:  gw,
+				GW:  route.GW,
 			})
 		}
 	}
 
-	if len(newResult.IPs) == 0 {
-		return nil, fmt.Errorf("cannot convert: no valid IP addresses")
-	}
-
 	return newResult, nil
 }
 
@@ -206,11 +195,15 @@ func (r *Result) GetAsVersion(version string) (types.Result, error) {
 }
 
 func (r *Result) Print() error {
+	return r.PrintTo(os.Stdout)
+}
+
+func (r *Result) PrintTo(writer io.Writer) error {
 	data, err := json.MarshalIndent(r, "", "    ")
 	if err != nil {
 		return err
 	}
-	_, err = os.Stdout.Write(data)
+	_, err = writer.Write(data)
 	return err
 }
 
diff --git a/vendor/github.com/containernetworking/cni/pkg/types/types.go b/vendor/github.com/containernetworking/cni/pkg/types/types.go
index 4684a3207..d0d11006a 100644
--- a/vendor/github.com/containernetworking/cni/pkg/types/types.go
+++ b/vendor/github.com/containernetworking/cni/pkg/types/types.go
@@ -18,6 +18,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net"
 	"os"
 )
@@ -65,6 +66,9 @@ type NetConf struct {
 	Capabilities map[string]bool `json:"capabilities,omitempty"`
 	IPAM         IPAM            `json:"ipam,omitempty"`
 	DNS          DNS             `json:"dns"`
+
+	RawPrevResult map[string]interface{} `json:"prevResult,omitempty"`
+	PrevResult    Result                 `json:"-"`
 }
 
 type IPAM struct {
@@ -75,15 +79,16 @@ type IPAM struct {
 type NetConfList struct {
 	CNIVersion string `json:"cniVersion,omitempty"`
 
-	Name    string     `json:"name,omitempty"`
-	Plugins []*NetConf `json:"plugins,omitempty"`
+	Name         string     `json:"name,omitempty"`
+	DisableCheck bool       `json:"disableCheck,omitempty"`
+	Plugins      []*NetConf `json:"plugins,omitempty"`
 }
 
 type ResultFactoryFunc func([]byte) (Result, error)
 
 // Result is an interface that provides the result of plugin execution
 type Result interface {
-	// The highest CNI specification result verison the result supports
+	// The highest CNI specification result version the result supports
 	// without having to convert
 	Version() string
 
@@ -94,6 +99,9 @@ type Result interface {
 	// Prints the result in JSON format to stdout
 	Print() error
 
+	// Prints the result in JSON format to provided writer
+	PrintTo(writer io.Writer) error
+
 	// Returns a JSON string representation of the result
 	String() string
 }
diff --git a/vendor/github.com/containernetworking/cni/pkg/version/plugin.go b/vendor/github.com/containernetworking/cni/pkg/version/plugin.go
index 612335a81..1df427243 100644
--- a/vendor/github.com/containernetworking/cni/pkg/version/plugin.go
+++ b/vendor/github.com/containernetworking/cni/pkg/version/plugin.go
@@ -86,9 +86,13 @@ func (*PluginDecoder) Decode(jsonBytes []byte) (PluginInfo, error) {
 // minor, and micro numbers or returns an error
 func ParseVersion(version string) (int, int, int, error) {
 	var major, minor, micro int
+	if version == "" {
+		return -1, -1, -1, fmt.Errorf("invalid version %q: the version is empty", version)
+	}
+
 	parts := strings.Split(version, ".")
-	if len(parts) == 0 || len(parts) >= 4 {
-		return -1, -1, -1, fmt.Errorf("invalid version %q: too many or too few parts", version)
+	if len(parts) >= 4 {
+		return -1, -1, -1, fmt.Errorf("invalid version %q: too many parts", version)
 	}
 
 	major, err := strconv.Atoi(parts[0])
@@ -114,7 +118,7 @@ func ParseVersion(version string) (int, int, int, error) {
 }
 
 // GreaterThanOrEqualTo takes two string versions, parses them into major/minor/micro
-// nubmers, and compares them to determine whether the first version is greater
+// numbers, and compares them to determine whether the first version is greater
 // than or equal to the second
 func GreaterThanOrEqualTo(version, otherVersion string) (bool, error) {
 	firstMajor, firstMinor, firstMicro, err := ParseVersion(version)
diff --git a/vendor/github.com/containernetworking/cni/pkg/version/version.go b/vendor/github.com/containernetworking/cni/pkg/version/version.go
index c8e46d55b..8f3508e61 100644
--- a/vendor/github.com/containernetworking/cni/pkg/version/version.go
+++ b/vendor/github.com/containernetworking/cni/pkg/version/version.go
@@ -15,6 +15,7 @@
 package version
 
 import (
+	"encoding/json"
 	"fmt"
 
 	"github.com/containernetworking/cni/pkg/types"
@@ -59,3 +60,24 @@ func NewResult(version string, resultBytes []byte) (types.Result, error) {
 
 	return nil, fmt.Errorf("unsupported CNI result version %q", version)
 }
+
+// ParsePrevResult parses a prevResult in a NetConf structure and sets
+// the NetConf's PrevResult member to the parsed Result object.
+func ParsePrevResult(conf *types.NetConf) error {
+	if conf.RawPrevResult == nil {
+		return nil
+	}
+
+	resultBytes, err := json.Marshal(conf.RawPrevResult)
+	if err != nil {
+		return fmt.Errorf("could not serialize prevResult: %v", err)
+	}
+
+	conf.RawPrevResult = nil
+	conf.PrevResult, err = NewResult(conf.CNIVersion, resultBytes)
+	if err != nil {
+		return fmt.Errorf("could not parse prevResult: %v", err)
+	}
+
+	return nil
+}