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-rw-r--r--vendor/github.com/containers/buildah/buildah.go2
-rw-r--r--vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_linux.go (renamed from vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go)32
-rw-r--r--vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_unsupported.go13
-rw-r--r--vendor/github.com/containers/buildah/pkg/parse/parse.go12
-rw-r--r--vendor/github.com/containers/buildah/pkg/parse/parse_unix.go20
-rw-r--r--vendor/github.com/containers/buildah/pkg/parse/parse_unsupported.go7
-rw-r--r--vendor/github.com/containers/buildah/run.go2020
-rw-r--r--vendor/github.com/containers/buildah/run_linux.go2022
-rw-r--r--vendor/github.com/containers/buildah/run_unsupport.go11
-rw-r--r--vendor/github.com/containers/buildah/run_unsupported.go20
-rw-r--r--vendor/github.com/varlink/go/varlink/bridge_windows.go4
-rw-r--r--vendor/github.com/varlink/go/varlink/call.go19
-rw-r--r--vendor/github.com/varlink/go/varlink/service.go109
-rw-r--r--vendor/github.com/varlink/go/varlink/varlink_test.go26
14 files changed, 2218 insertions, 2099 deletions
diff --git a/vendor/github.com/containers/buildah/buildah.go b/vendor/github.com/containers/buildah/buildah.go
index b6e6545ec..e29e69383 100644
--- a/vendor/github.com/containers/buildah/buildah.go
+++ b/vendor/github.com/containers/buildah/buildah.go
@@ -26,7 +26,7 @@ const (
Package = "buildah"
// Version for the Package. Bump version in contrib/rpm/buildah.spec
// too.
- Version = "1.8.0"
+ Version = "1.9.0-dev"
// The value we use to identify what type of information, currently a
// serialized Builder structure, we are using as per-container state.
// This should only be changed when we make incompatible changes to
diff --git a/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_linux.go
index 0789c2b3c..e9d745b67 100644
--- a/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink.go
+++ b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_linux.go
@@ -24,6 +24,22 @@ func init() {
reexec.Register(symlinkModifiedTime, resolveSymlinkTimeModified)
}
+// resolveSymlink uses a child subprocess to resolve any symlinks in filename
+// in the context of rootdir.
+func resolveSymlink(rootdir, filename string) (string, error) {
+ // The child process expects a chroot and one path that
+ // will be consulted relative to the chroot directory and evaluated
+ // for any symbolic links present.
+ cmd := reexec.Command(symlinkChrootedCommand, rootdir, filename)
+ output, err := cmd.CombinedOutput()
+ if err != nil {
+ return "", errors.Wrapf(err, string(output))
+ }
+
+ // Hand back the resolved symlink, will be filename if a symlink is not found
+ return string(output), nil
+}
+
// main() for resolveSymlink()'s subprocess.
func resolveChrootedSymlinks() {
status := 0
@@ -55,22 +71,6 @@ func resolveChrootedSymlinks() {
os.Exit(status)
}
-// resolveSymlink uses a child subprocess to resolve any symlinks in filename
-// in the context of rootdir.
-func resolveSymlink(rootdir, filename string) (string, error) {
- // The child process expects a chroot and one path that
- // will be consulted relative to the chroot directory and evaluated
- // for any symbolic links present.
- cmd := reexec.Command(symlinkChrootedCommand, rootdir, filename)
- output, err := cmd.CombinedOutput()
- if err != nil {
- return "", errors.Wrapf(err, string(output))
- }
-
- // Hand back the resolved symlink, will be filename if a symlink is not found
- return string(output), nil
-}
-
// main() for grandparent subprocess. Its main job is to shuttle stdio back
// and forth, managing a pseudo-terminal if we want one, for our child, the
// parent subprocess.
diff --git a/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_unsupported.go b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_unsupported.go
new file mode 100644
index 000000000..2cec4fe21
--- /dev/null
+++ b/vendor/github.com/containers/buildah/imagebuildah/chroot_symlink_unsupported.go
@@ -0,0 +1,13 @@
+// +build !linux
+
+package imagebuildah
+
+import "github.com/pkg/errors"
+
+func resolveSymlink(rootdir, filename string) (string, error) {
+ return "", errors.New("function not supported on non-linux systems")
+}
+
+func resolveModifiedTime(rootdir, filename, historyTime string) (bool, error) {
+ return false, errors.New("function not supported on non-linux systems")
+}
diff --git a/vendor/github.com/containers/buildah/pkg/parse/parse.go b/vendor/github.com/containers/buildah/pkg/parse/parse.go
index cc85136fd..bec41f3ae 100644
--- a/vendor/github.com/containers/buildah/pkg/parse/parse.go
+++ b/vendor/github.com/containers/buildah/pkg/parse/parse.go
@@ -22,7 +22,6 @@ import (
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh/terminal"
- "golang.org/x/sys/unix"
)
const (
@@ -39,14 +38,9 @@ func CommonBuildOptions(c *cobra.Command) (*buildah.CommonBuildOptions, error) {
memorySwap int64
err error
)
- rlim := unix.Rlimit{Cur: 1048576, Max: 1048576}
- defaultLimits := []string{}
- if err := unix.Setrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
- defaultLimits = append(defaultLimits, fmt.Sprintf("nofile=%d:%d", rlim.Cur, rlim.Max))
- }
- if err := unix.Setrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
- defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", rlim.Cur, rlim.Max))
- }
+
+ defaultLimits := getDefaultProcessLimits()
+
memVal, _ := c.Flags().GetString("memory")
if memVal != "" {
memoryLimit, err = units.RAMInBytes(memVal)
diff --git a/vendor/github.com/containers/buildah/pkg/parse/parse_unix.go b/vendor/github.com/containers/buildah/pkg/parse/parse_unix.go
new file mode 100644
index 000000000..d056c1bb3
--- /dev/null
+++ b/vendor/github.com/containers/buildah/pkg/parse/parse_unix.go
@@ -0,0 +1,20 @@
+// +build linux darwin
+
+package parse
+
+import (
+ "fmt"
+ "golang.org/x/sys/unix"
+)
+
+func getDefaultProcessLimits() []string {
+ rlim := unix.Rlimit{Cur: 1048576, Max: 1048576}
+ defaultLimits := []string{}
+ if err := unix.Setrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
+ defaultLimits = append(defaultLimits, fmt.Sprintf("nofile=%d:%d", rlim.Cur, rlim.Max))
+ }
+ if err := unix.Setrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
+ defaultLimits = append(defaultLimits, fmt.Sprintf("nproc=%d:%d", rlim.Cur, rlim.Max))
+ }
+ return defaultLimits
+}
diff --git a/vendor/github.com/containers/buildah/pkg/parse/parse_unsupported.go b/vendor/github.com/containers/buildah/pkg/parse/parse_unsupported.go
new file mode 100644
index 000000000..7e970624f
--- /dev/null
+++ b/vendor/github.com/containers/buildah/pkg/parse/parse_unsupported.go
@@ -0,0 +1,7 @@
+// +build !linux,!darwin
+
+package parse
+
+func getDefaultProcessLimits() []string {
+ return []string{}
+}
diff --git a/vendor/github.com/containers/buildah/run.go b/vendor/github.com/containers/buildah/run.go
index 00eac8e39..88900b6b7 100644
--- a/vendor/github.com/containers/buildah/run.go
+++ b/vendor/github.com/containers/buildah/run.go
@@ -1,44 +1,10 @@
package buildah
import (
- "bytes"
- "context"
- "encoding/json"
"fmt"
"io"
- "io/ioutil"
- "net"
- "os"
- "os/exec"
- "path/filepath"
- "runtime"
- "strconv"
- "strings"
- "sync"
- "syscall"
- "time"
- "github.com/containernetworking/cni/libcni"
- "github.com/containers/buildah/bind"
- "github.com/containers/buildah/chroot"
- "github.com/containers/buildah/pkg/secrets"
- "github.com/containers/buildah/pkg/unshare"
- "github.com/containers/buildah/util"
- "github.com/containers/storage/pkg/idtools"
- "github.com/containers/storage/pkg/ioutils"
- "github.com/containers/storage/pkg/reexec"
- "github.com/containers/storage/pkg/stringid"
- units "github.com/docker/go-units"
- "github.com/docker/libnetwork/resolvconf"
- "github.com/docker/libnetwork/types"
- digest "github.com/opencontainers/go-digest"
- specs "github.com/opencontainers/runtime-spec/specs-go"
- "github.com/opencontainers/runtime-tools/generate"
- "github.com/opencontainers/selinux/go-selinux/label"
- "github.com/pkg/errors"
- "github.com/sirupsen/logrus"
- "golang.org/x/crypto/ssh/terminal"
- "golang.org/x/sys/unix"
+ "github.com/opencontainers/runtime-spec/specs-go"
)
const (
@@ -203,34 +169,6 @@ type RunOptions struct {
DropCapabilities []string
}
-// DefaultNamespaceOptions returns the default namespace settings from the
-// runtime-tools generator library.
-func DefaultNamespaceOptions() (NamespaceOptions, error) {
- options := NamespaceOptions{
- {Name: string(specs.CgroupNamespace), Host: true},
- {Name: string(specs.IPCNamespace), Host: true},
- {Name: string(specs.MountNamespace), Host: true},
- {Name: string(specs.NetworkNamespace), Host: true},
- {Name: string(specs.PIDNamespace), Host: true},
- {Name: string(specs.UserNamespace), Host: true},
- {Name: string(specs.UTSNamespace), Host: true},
- }
- g, err := generate.New("linux")
- if err != nil {
- return options, errors.Wrapf(err, "error generating new 'linux' runtime spec")
- }
- spec := g.Config
- if spec.Linux != nil {
- for _, ns := range spec.Linux.Namespaces {
- options.AddOrReplace(NamespaceOption{
- Name: string(ns.Type),
- Path: ns.Path,
- })
- }
- }
- return options, nil
-}
-
// Find the configuration for the namespace of the given type. If there are
// duplicates, find the _last_ one of the type, since we assume it was appended
// more recently.
@@ -258,1959 +196,3 @@ nextOption:
*n = append(*n, option)
}
}
-
-func addRlimits(ulimit []string, g *generate.Generator) error {
- var (
- ul *units.Ulimit
- err error
- )
-
- for _, u := range ulimit {
- if ul, err = units.ParseUlimit(u); err != nil {
- return errors.Wrapf(err, "ulimit option %q requires name=SOFT:HARD, failed to be parsed", u)
- }
-
- g.AddProcessRlimits("RLIMIT_"+strings.ToUpper(ul.Name), uint64(ul.Hard), uint64(ul.Soft))
- }
- return nil
-}
-
-func addCommonOptsToSpec(commonOpts *CommonBuildOptions, g *generate.Generator) error {
- // Resources - CPU
- if commonOpts.CPUPeriod != 0 {
- g.SetLinuxResourcesCPUPeriod(commonOpts.CPUPeriod)
- }
- if commonOpts.CPUQuota != 0 {
- g.SetLinuxResourcesCPUQuota(commonOpts.CPUQuota)
- }
- if commonOpts.CPUShares != 0 {
- g.SetLinuxResourcesCPUShares(commonOpts.CPUShares)
- }
- if commonOpts.CPUSetCPUs != "" {
- g.SetLinuxResourcesCPUCpus(commonOpts.CPUSetCPUs)
- }
- if commonOpts.CPUSetMems != "" {
- g.SetLinuxResourcesCPUMems(commonOpts.CPUSetMems)
- }
-
- // Resources - Memory
- if commonOpts.Memory != 0 {
- g.SetLinuxResourcesMemoryLimit(commonOpts.Memory)
- }
- if commonOpts.MemorySwap != 0 {
- g.SetLinuxResourcesMemorySwap(commonOpts.MemorySwap)
- }
-
- // cgroup membership
- if commonOpts.CgroupParent != "" {
- g.SetLinuxCgroupsPath(commonOpts.CgroupParent)
- }
-
- // Other process resource limits
- if err := addRlimits(commonOpts.Ulimit, g); err != nil {
- return err
- }
-
- logrus.Debugf("Resources: %#v", commonOpts)
- return nil
-}
-
-func (b *Builder) setupMounts(mountPoint string, spec *specs.Spec, bundlePath string, optionMounts []specs.Mount, bindFiles map[string]string, builtinVolumes, volumeMounts []string, shmSize string, namespaceOptions NamespaceOptions) error {
- // Start building a new list of mounts.
- var mounts []specs.Mount
- haveMount := func(destination string) bool {
- for _, mount := range mounts {
- if mount.Destination == destination {
- // Already have something to mount there.
- return true
- }
- }
- return false
- }
-
- ipc := namespaceOptions.Find(string(specs.IPCNamespace))
- hostIPC := ipc == nil || ipc.Host
- net := namespaceOptions.Find(string(specs.NetworkNamespace))
- hostNetwork := net == nil || net.Host
- user := namespaceOptions.Find(string(specs.UserNamespace))
- hostUser := user == nil || user.Host
-
- // Copy mounts from the generated list.
- mountCgroups := true
- specMounts := []specs.Mount{}
- for _, specMount := range spec.Mounts {
- // Override some of the mounts from the generated list if we're doing different things with namespaces.
- if specMount.Destination == "/dev/shm" {
- specMount.Options = []string{"nosuid", "noexec", "nodev", "mode=1777", "size=" + shmSize}
- if hostIPC && !hostUser {
- if _, err := os.Stat("/dev/shm"); err != nil && os.IsNotExist(err) {
- logrus.Debugf("/dev/shm is not present, not binding into container")
- continue
- }
- specMount = specs.Mount{
- Source: "/dev/shm",
- Type: "bind",
- Destination: "/dev/shm",
- Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev"},
- }
- }
- }
- if specMount.Destination == "/dev/mqueue" {
- if hostIPC && !hostUser {
- if _, err := os.Stat("/dev/mqueue"); err != nil && os.IsNotExist(err) {
- logrus.Debugf("/dev/mqueue is not present, not binding into container")
- continue
- }
- specMount = specs.Mount{
- Source: "/dev/mqueue",
- Type: "bind",
- Destination: "/dev/mqueue",
- Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev"},
- }
- }
- }
- if specMount.Destination == "/sys" {
- if hostNetwork && !hostUser {
- mountCgroups = false
- if _, err := os.Stat("/sys"); err != nil && os.IsNotExist(err) {
- logrus.Debugf("/sys is not present, not binding into container")
- continue
- }
- specMount = specs.Mount{
- Source: "/sys",
- Type: "bind",
- Destination: "/sys",
- Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev", "ro"},
- }
- }
- }
- specMounts = append(specMounts, specMount)
- }
-
- // Add a mount for the cgroups filesystem, unless we're already
- // recursively bind mounting all of /sys, in which case we shouldn't
- // bother with it.
- sysfsMount := []specs.Mount{}
- if mountCgroups {
- sysfsMount = []specs.Mount{{
- Destination: "/sys/fs/cgroup",
- Type: "cgroup",
- Source: "cgroup",
- Options: []string{bind.NoBindOption, "nosuid", "noexec", "nodev", "relatime", "ro"},
- }}
- }
-
- // Get the list of files we need to bind into the container.
- bindFileMounts, err := runSetupBoundFiles(bundlePath, bindFiles)
- if err != nil {
- return err
- }
-
- // After this point we need to know the per-container persistent storage directory.
- cdir, err := b.store.ContainerDirectory(b.ContainerID)
- if err != nil {
- return errors.Wrapf(err, "error determining work directory for container %q", b.ContainerID)
- }
-
- // Figure out which UID and GID to tell the secrets package to use
- // for files that it creates.
- rootUID, rootGID, err := util.GetHostRootIDs(spec)
- if err != nil {
- return err
- }
-
- // Get the list of secrets mounts.
- secretMounts := secrets.SecretMountsWithUIDGID(b.MountLabel, cdir, b.DefaultMountsFilePath, cdir, int(rootUID), int(rootGID), unshare.IsRootless())
-
- // Add temporary copies of the contents of volume locations at the
- // volume locations, unless we already have something there.
- copyWithTar := b.copyWithTar(nil, nil)
- builtins, err := runSetupBuiltinVolumes(b.MountLabel, mountPoint, cdir, copyWithTar, builtinVolumes, int(rootUID), int(rootGID))
- if err != nil {
- return err
- }
-
- // Get the list of explicitly-specified volume mounts.
- volumes, err := runSetupVolumeMounts(spec.Linux.MountLabel, volumeMounts, optionMounts)
- if err != nil {
- return err
- }
-
- // Add them all, in the preferred order, except where they conflict with something that was previously added.
- for _, mount := range append(append(append(append(append(volumes, builtins...), secretMounts...), bindFileMounts...), specMounts...), sysfsMount...) {
- if haveMount(mount.Destination) {
- // Already mounting something there, no need to bother with this one.
- continue
- }
- // Add the mount.
- mounts = append(mounts, mount)
- }
-
- // Set the list in the spec.
- spec.Mounts = mounts
- return nil
-}
-
-func runSetupBoundFiles(bundlePath string, bindFiles map[string]string) (mounts []specs.Mount, err error) {
- for dest, src := range bindFiles {
- options := []string{"rbind"}
- if strings.HasPrefix(src, bundlePath) {
- options = append(options, bind.NoBindOption)
- }
- mounts = append(mounts, specs.Mount{
- Source: src,
- Destination: dest,
- Type: "bind",
- Options: options,
- })
- }
- return mounts, nil
-}
-
-func runSetupBuiltinVolumes(mountLabel, mountPoint, containerDir string, copyWithTar func(srcPath, dstPath string) error, builtinVolumes []string, rootUID, rootGID int) ([]specs.Mount, error) {
- var mounts []specs.Mount
- hostOwner := idtools.IDPair{UID: rootUID, GID: rootGID}
- // Add temporary copies of the contents of volume locations at the
- // volume locations, unless we already have something there.
- for _, volume := range builtinVolumes {
- subdir := digest.Canonical.FromString(volume).Hex()
- volumePath := filepath.Join(containerDir, "buildah-volumes", subdir)
- srcPath := filepath.Join(mountPoint, volume)
- initializeVolume := false
- // If we need to, initialize the volume path's initial contents.
- if _, err := os.Stat(volumePath); err != nil {
- if !os.IsNotExist(err) {
- return nil, errors.Wrapf(err, "failed to stat %q for volume %q", volumePath, volume)
- }
- logrus.Debugf("setting up built-in volume at %q", volumePath)
- if err = os.MkdirAll(volumePath, 0755); err != nil {
- return nil, errors.Wrapf(err, "error creating directory %q for volume %q", volumePath, volume)
- }
- if err = label.Relabel(volumePath, mountLabel, false); err != nil {
- return nil, errors.Wrapf(err, "error relabeling directory %q for volume %q", volumePath, volume)
- }
- initializeVolume = true
- }
- stat, err := os.Stat(srcPath)
- if err != nil {
- if !os.IsNotExist(err) {
- return nil, errors.Wrapf(err, "failed to stat %q for volume %q", srcPath, volume)
- }
- if err = idtools.MkdirAllAndChownNew(srcPath, 0755, hostOwner); err != nil {
- return nil, errors.Wrapf(err, "error creating directory %q for volume %q", srcPath, volume)
- }
- if stat, err = os.Stat(srcPath); err != nil {
- return nil, errors.Wrapf(err, "failed to stat %q for volume %q", srcPath, volume)
- }
- }
- if initializeVolume {
- if err = os.Chmod(volumePath, stat.Mode().Perm()); err != nil {
- return nil, errors.Wrapf(err, "failed to chmod %q for volume %q", volumePath, volume)
- }
- if err = os.Chown(volumePath, int(stat.Sys().(*syscall.Stat_t).Uid), int(stat.Sys().(*syscall.Stat_t).Gid)); err != nil {
- return nil, errors.Wrapf(err, "error chowning directory %q for volume %q", volumePath, volume)
- }
- if err = copyWithTar(srcPath, volumePath); err != nil && !os.IsNotExist(errors.Cause(err)) {
- return nil, errors.Wrapf(err, "error populating directory %q for volume %q using contents of %q", volumePath, volume, srcPath)
- }
- }
- // Add the bind mount.
- mounts = append(mounts, specs.Mount{
- Source: volumePath,
- Destination: volume,
- Type: "bind",
- Options: []string{"bind"},
- })
- }
- return mounts, nil
-}
-
-func runSetupVolumeMounts(mountLabel string, volumeMounts []string, optionMounts []specs.Mount) ([]specs.Mount, error) {
- var mounts []specs.Mount
-
- parseMount := func(host, container string, options []string) (specs.Mount, error) {
- var foundrw, foundro, foundz, foundZ bool
- var rootProp string
- for _, opt := range options {
- switch opt {
- case "rw":
- foundrw = true
- case "ro":
- foundro = true
- case "z":
- foundz = true
- case "Z":
- foundZ = true
- case "private", "rprivate", "slave", "rslave", "shared", "rshared":
- rootProp = opt
- }
- }
- if !foundrw && !foundro {
- options = append(options, "rw")
- }
- if foundz {
- if err := label.Relabel(host, mountLabel, true); err != nil {
- return specs.Mount{}, errors.Wrapf(err, "relabeling %q failed", host)
- }
- }
- if foundZ {
- if err := label.Relabel(host, mountLabel, false); err != nil {
- return specs.Mount{}, errors.Wrapf(err, "relabeling %q failed", host)
- }
- }
- if rootProp == "" {
- options = append(options, "private")
- }
- return specs.Mount{
- Destination: container,
- Type: "bind",
- Source: host,
- Options: options,
- }, nil
- }
- // Bind mount volumes specified for this particular Run() invocation
- for _, i := range optionMounts {
- logrus.Debugf("setting up mounted volume at %q", i.Destination)
- mount, err := parseMount(i.Source, i.Destination, append(i.Options, "rbind"))
- if err != nil {
- return nil, err
- }
- mounts = append(mounts, mount)
- }
- // Bind mount volumes given by the user when the container was created
- for _, i := range volumeMounts {
- var options []string
- spliti := strings.Split(i, ":")
- if len(spliti) > 2 {
- options = strings.Split(spliti[2], ",")
- }
- options = append(options, "rbind")
- mount, err := parseMount(spliti[0], spliti[1], options)
- if err != nil {
- return nil, err
- }
- mounts = append(mounts, mount)
- }
- return mounts, nil
-}
-
-// addNetworkConfig copies files from host and sets them up to bind mount into container
-func (b *Builder) addNetworkConfig(rdir, hostPath string, chownOpts *idtools.IDPair, dnsServers, dnsSearch, dnsOptions []string) (string, error) {
- stat, err := os.Stat(hostPath)
- if err != nil {
- return "", errors.Wrapf(err, "error statting %q for container %q", hostPath, b.ContainerID)
- }
- contents, err := ioutil.ReadFile(hostPath)
- if err != nil {
- return "", errors.Wrapf(err, "unable to read %s", hostPath)
- }
-
- search := resolvconf.GetSearchDomains(contents)
- nameservers := resolvconf.GetNameservers(contents, types.IP)
- options := resolvconf.GetOptions(contents)
-
- if len(dnsSearch) > 0 {
- search = dnsSearch
- }
- if len(dnsServers) != 0 {
- dns, err := getDNSIP(dnsServers)
- if err != nil {
- return "", errors.Wrapf(err, "error getting dns servers")
- }
- nameservers = []string{}
- for _, server := range dns {
- nameservers = append(nameservers, server.String())
- }
- }
-
- if len(dnsOptions) != 0 {
- options = dnsOptions
- }
-
- cfile := filepath.Join(rdir, filepath.Base(hostPath))
- if _, err = resolvconf.Build(cfile, nameservers, search, options); err != nil {
- return "", errors.Wrapf(err, "error building resolv.conf for container %s", b.ContainerID)
- }
-
- uid := int(stat.Sys().(*syscall.Stat_t).Uid)
- gid := int(stat.Sys().(*syscall.Stat_t).Gid)
- if chownOpts != nil {
- uid = chownOpts.UID
- gid = chownOpts.GID
- }
- if err = os.Chown(cfile, uid, gid); err != nil {
- return "", errors.Wrapf(err, "error chowning file %q for container %q", cfile, b.ContainerID)
- }
-
- if err := label.Relabel(cfile, b.MountLabel, false); err != nil {
- return "", errors.Wrapf(err, "error relabeling %q in container %q", cfile, b.ContainerID)
- }
-
- return cfile, nil
-}
-
-func getDNSIP(dnsServers []string) (dns []net.IP, err error) {
- for _, i := range dnsServers {
- result := net.ParseIP(i)
- if result == nil {
- return dns, errors.Errorf("invalid IP address %s", i)
- }
- dns = append(dns, result)
- }
- return dns, nil
-}
-
-// generateHosts creates a containers hosts file
-func (b *Builder) generateHosts(rdir, hostname string, addHosts []string, chownOpts *idtools.IDPair) (string, error) {
- hostPath := "/etc/hosts"
- stat, err := os.Stat(hostPath)
- if err != nil {
- return "", errors.Wrapf(err, "error statting %q for container %q", hostPath, b.ContainerID)
- }
-
- hosts := bytes.NewBufferString("# Generated by Buildah\n")
- orig, err := ioutil.ReadFile(hostPath)
- if err != nil {
- return "", errors.Wrapf(err, "unable to read %s", hostPath)
- }
- hosts.Write(orig)
- for _, host := range addHosts {
- // verify the host format
- values := strings.SplitN(host, ":", 2)
- if len(values) != 2 {
- return "", errors.Errorf("unable to parse host entry %q: incorrect format", host)
- }
- if values[0] == "" {
- return "", errors.Errorf("hostname in host entry %q is empty", host)
- }
- if values[1] == "" {
- return "", errors.Errorf("IP address in host entry %q is empty", host)
- }
- hosts.Write([]byte(fmt.Sprintf("%s\t%s\n", values[1], values[0])))
- }
-
- if hostname != "" {
- hosts.Write([]byte(fmt.Sprintf("127.0.0.1 %s\n", hostname)))
- hosts.Write([]byte(fmt.Sprintf("::1 %s\n", hostname)))
- }
- cfile := filepath.Join(rdir, filepath.Base(hostPath))
- if err = ioutils.AtomicWriteFile(cfile, hosts.Bytes(), stat.Mode().Perm()); err != nil {
- return "", errors.Wrapf(err, "error writing /etc/hosts into the container")
- }
- uid := int(stat.Sys().(*syscall.Stat_t).Uid)
- gid := int(stat.Sys().(*syscall.Stat_t).Gid)
- if chownOpts != nil {
- uid = chownOpts.UID
- gid = chownOpts.GID
- }
- if err = os.Chown(cfile, uid, gid); err != nil {
- return "", errors.Wrapf(err, "error chowning file %q for container %q", cfile, b.ContainerID)
- }
- if err := label.Relabel(cfile, b.MountLabel, false); err != nil {
- return "", errors.Wrapf(err, "error relabeling %q in container %q", cfile, b.ContainerID)
- }
-
- return cfile, nil
-}
-
-func setupMaskedPaths(g *generate.Generator) {
- for _, mp := range []string{
- "/proc/acpi",
- "/proc/kcore",
- "/proc/keys",
- "/proc/latency_stats",
- "/proc/timer_list",
- "/proc/timer_stats",
- "/proc/sched_debug",
- "/proc/scsi",
- "/sys/firmware",
- } {
- g.AddLinuxMaskedPaths(mp)
- }
-}
-
-func setupReadOnlyPaths(g *generate.Generator) {
- for _, rp := range []string{
- "/proc/asound",
- "/proc/bus",
- "/proc/fs",
- "/proc/irq",
- "/proc/sys",
- "/proc/sysrq-trigger",
- } {
- g.AddLinuxReadonlyPaths(rp)
- }
-}
-
-func setupCapAdd(g *generate.Generator, caps ...string) error {
- for _, cap := range caps {
- if err := g.AddProcessCapabilityBounding(cap); err != nil {
- return errors.Wrapf(err, "error adding %q to the bounding capability set", cap)
- }
- if err := g.AddProcessCapabilityEffective(cap); err != nil {
- return errors.Wrapf(err, "error adding %q to the effective capability set", cap)
- }
- if err := g.AddProcessCapabilityInheritable(cap); err != nil {
- return errors.Wrapf(err, "error adding %q to the inheritable capability set", cap)
- }
- if err := g.AddProcessCapabilityPermitted(cap); err != nil {
- return errors.Wrapf(err, "error adding %q to the permitted capability set", cap)
- }
- if err := g.AddProcessCapabilityAmbient(cap); err != nil {
- return errors.Wrapf(err, "error adding %q to the ambient capability set", cap)
- }
- }
- return nil
-}
-
-func setupCapDrop(g *generate.Generator, caps ...string) error {
- for _, cap := range caps {
- if err := g.DropProcessCapabilityBounding(cap); err != nil {
- return errors.Wrapf(err, "error removing %q from the bounding capability set", cap)
- }
- if err := g.DropProcessCapabilityEffective(cap); err != nil {
- return errors.Wrapf(err, "error removing %q from the effective capability set", cap)
- }
- if err := g.DropProcessCapabilityInheritable(cap); err != nil {
- return errors.Wrapf(err, "error removing %q from the inheritable capability set", cap)
- }
- if err := g.DropProcessCapabilityPermitted(cap); err != nil {
- return errors.Wrapf(err, "error removing %q from the permitted capability set", cap)
- }
- if err := g.DropProcessCapabilityAmbient(cap); err != nil {
- return errors.Wrapf(err, "error removing %q from the ambient capability set", cap)
- }
- }
- return nil
-}
-
-func setupCapabilities(g *generate.Generator, firstAdds, firstDrops, secondAdds, secondDrops []string) error {
- g.ClearProcessCapabilities()
- if err := setupCapAdd(g, util.DefaultCapabilities...); err != nil {
- return err
- }
- if err := setupCapAdd(g, firstAdds...); err != nil {
- return err
- }
- if err := setupCapDrop(g, firstDrops...); err != nil {
- return err
- }
- if err := setupCapAdd(g, secondAdds...); err != nil {
- return err
- }
- return setupCapDrop(g, secondDrops...)
-}
-
-func setupTerminal(g *generate.Generator, terminalPolicy TerminalPolicy, terminalSize *specs.Box) {
- switch terminalPolicy {
- case DefaultTerminal:
- onTerminal := terminal.IsTerminal(unix.Stdin) && terminal.IsTerminal(unix.Stdout) && terminal.IsTerminal(unix.Stderr)
- if onTerminal {
- logrus.Debugf("stdio is a terminal, defaulting to using a terminal")
- } else {
- logrus.Debugf("stdio is not a terminal, defaulting to not using a terminal")
- }
- g.SetProcessTerminal(onTerminal)
- case WithTerminal:
- g.SetProcessTerminal(true)
- case WithoutTerminal:
- g.SetProcessTerminal(false)
- }
- if terminalSize != nil {
- g.SetProcessConsoleSize(terminalSize.Width, terminalSize.Height)
- }
-}
-
-func setupNamespaces(g *generate.Generator, namespaceOptions NamespaceOptions, idmapOptions IDMappingOptions, policy NetworkConfigurationPolicy) (configureNetwork bool, configureNetworks []string, configureUTS bool, err error) {
- // Set namespace options in the container configuration.
- configureUserns := false
- specifiedNetwork := false
- for _, namespaceOption := range namespaceOptions {
- switch namespaceOption.Name {
- case string(specs.UserNamespace):
- configureUserns = false
- if !namespaceOption.Host && namespaceOption.Path == "" {
- configureUserns = true
- }
- case string(specs.NetworkNamespace):
- specifiedNetwork = true
- configureNetwork = false
- if !namespaceOption.Host && (namespaceOption.Path == "" || !filepath.IsAbs(namespaceOption.Path)) {
- if namespaceOption.Path != "" && !filepath.IsAbs(namespaceOption.Path) {
- configureNetworks = strings.Split(namespaceOption.Path, ",")
- namespaceOption.Path = ""
- }
- configureNetwork = (policy != NetworkDisabled)
- }
- case string(specs.UTSNamespace):
- configureUTS = false
- if !namespaceOption.Host && namespaceOption.Path == "" {
- configureUTS = true
- }
- }
- if namespaceOption.Host {
- if err := g.RemoveLinuxNamespace(namespaceOption.Name); err != nil {
- return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", namespaceOption.Name)
- }
- } else if err := g.AddOrReplaceLinuxNamespace(namespaceOption.Name, namespaceOption.Path); err != nil {
- if namespaceOption.Path == "" {
- return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", namespaceOption.Name)
- }
- return false, nil, false, errors.Wrapf(err, "error adding %q namespace %q for run", namespaceOption.Name, namespaceOption.Path)
- }
- }
-
- // If we've got mappings, we're going to have to create a user namespace.
- if len(idmapOptions.UIDMap) > 0 || len(idmapOptions.GIDMap) > 0 || configureUserns {
- if err := g.AddOrReplaceLinuxNamespace(specs.UserNamespace, ""); err != nil {
- return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", string(specs.UserNamespace))
- }
- hostUidmap, hostGidmap, err := unshare.GetHostIDMappings("")
- if err != nil {
- return false, nil, false, err
- }
- for _, m := range idmapOptions.UIDMap {
- g.AddLinuxUIDMapping(m.HostID, m.ContainerID, m.Size)
- }
- if len(idmapOptions.UIDMap) == 0 {
- for _, m := range hostUidmap {
- g.AddLinuxUIDMapping(m.ContainerID, m.ContainerID, m.Size)
- }
- }
- for _, m := range idmapOptions.GIDMap {
- g.AddLinuxGIDMapping(m.HostID, m.ContainerID, m.Size)
- }
- if len(idmapOptions.GIDMap) == 0 {
- for _, m := range hostGidmap {
- g.AddLinuxGIDMapping(m.ContainerID, m.ContainerID, m.Size)
- }
- }
- if !specifiedNetwork {
- if err := g.AddOrReplaceLinuxNamespace(specs.NetworkNamespace, ""); err != nil {
- return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", string(specs.NetworkNamespace))
- }
- configureNetwork = (policy != NetworkDisabled)
- }
- } else {
- if err := g.RemoveLinuxNamespace(specs.UserNamespace); err != nil {
- return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", string(specs.UserNamespace))
- }
- if !specifiedNetwork {
- if err := g.RemoveLinuxNamespace(specs.NetworkNamespace); err != nil {
- return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", string(specs.NetworkNamespace))
- }
- }
- }
- if configureNetwork {
- for name, val := range util.DefaultNetworkSysctl {
- g.AddLinuxSysctl(name, val)
- }
- }
- return configureNetwork, configureNetworks, configureUTS, nil
-}
-
-// Search for a command that isn't given as an absolute path using the $PATH
-// under the rootfs. We can't resolve absolute symbolic links without
-// chroot()ing, which we may not be able to do, so just accept a link as a
-// valid resolution.
-func runLookupPath(g *generate.Generator, command []string) []string {
- // Look for the configured $PATH.
- spec := g.Config
- envPath := ""
- for i := range spec.Process.Env {
- if strings.HasPrefix(spec.Process.Env[i], "PATH=") {
- envPath = spec.Process.Env[i]
- }
- }
- // If there is no configured $PATH, supply one.
- if envPath == "" {
- defaultPath := "/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
- envPath = "PATH=" + defaultPath
- g.AddProcessEnv("PATH", defaultPath)
- }
- // No command, nothing to do.
- if len(command) == 0 {
- return command
- }
- // Command is already an absolute path, use it as-is.
- if filepath.IsAbs(command[0]) {
- return command
- }
- // For each element in the PATH,
- for _, pathEntry := range filepath.SplitList(envPath[5:]) {
- // if it's the empty string, it's ".", which is the Cwd,
- if pathEntry == "" {
- pathEntry = spec.Process.Cwd
- }
- // build the absolute path which it might be,
- candidate := filepath.Join(pathEntry, command[0])
- // check if it's there,
- if fi, err := os.Lstat(filepath.Join(spec.Root.Path, candidate)); fi != nil && err == nil {
- // and if it's not a directory, and either a symlink or executable,
- if !fi.IsDir() && ((fi.Mode()&os.ModeSymlink != 0) || (fi.Mode()&0111 != 0)) {
- // use that.
- return append([]string{candidate}, command[1:]...)
- }
- }
- }
- return command
-}
-
-func (b *Builder) configureUIDGID(g *generate.Generator, mountPoint string, options RunOptions) error {
- // Set the user UID/GID/supplemental group list/capabilities lists.
- user, err := b.user(mountPoint, options.User)
- if err != nil {
- return err
- }
- if err := setupCapabilities(g, b.AddCapabilities, b.DropCapabilities, options.AddCapabilities, options.DropCapabilities); err != nil {
- return err
- }
- g.SetProcessUID(user.UID)
- g.SetProcessGID(user.GID)
- for _, gid := range user.AdditionalGids {
- g.AddProcessAdditionalGid(gid)
- }
-
- // Remove capabilities if not running as root except Bounding set
- if user.UID != 0 {
- bounding := g.Config.Process.Capabilities.Bounding
- g.ClearProcessCapabilities()
- g.Config.Process.Capabilities.Bounding = bounding
- }
-
- return nil
-}
-
-func (b *Builder) configureEnvironment(g *generate.Generator, options RunOptions) {
- g.ClearProcessEnv()
- if b.CommonBuildOpts.HTTPProxy {
- for _, envSpec := range []string{
- "http_proxy",
- "HTTP_PROXY",
- "https_proxy",
- "HTTPS_PROXY",
- "ftp_proxy",
- "FTP_PROXY",
- "no_proxy",
- "NO_PROXY",
- } {
- envVal := os.Getenv(envSpec)
- if envVal != "" {
- g.AddProcessEnv(envSpec, envVal)
- }
- }
- }
-
- for _, envSpec := range append(b.Env(), options.Env...) {
- env := strings.SplitN(envSpec, "=", 2)
- if len(env) > 1 {
- g.AddProcessEnv(env[0], env[1])
- }
- }
-
- for src, dest := range b.Args {
- g.AddProcessEnv(src, dest)
- }
-}
-
-func (b *Builder) configureNamespaces(g *generate.Generator, options RunOptions) (bool, []string, error) {
- defaultNamespaceOptions, err := DefaultNamespaceOptions()
- if err != nil {
- return false, nil, err
- }
-
- namespaceOptions := defaultNamespaceOptions
- namespaceOptions.AddOrReplace(b.NamespaceOptions...)
- namespaceOptions.AddOrReplace(options.NamespaceOptions...)
-
- networkPolicy := options.ConfigureNetwork
- if networkPolicy == NetworkDefault {
- networkPolicy = b.ConfigureNetwork
- }
-
- configureNetwork, configureNetworks, configureUTS, err := setupNamespaces(g, namespaceOptions, b.IDMappingOptions, networkPolicy)
- if err != nil {
- return false, nil, err
- }
-
- if configureUTS {
- if options.Hostname != "" {
- g.SetHostname(options.Hostname)
- } else if b.Hostname() != "" {
- g.SetHostname(b.Hostname())
- } else {
- g.SetHostname(stringid.TruncateID(b.ContainerID))
- }
- } else {
- g.SetHostname("")
- }
-
- found := false
- spec := g.Config
- for i := range spec.Process.Env {
- if strings.HasPrefix(spec.Process.Env[i], "HOSTNAME=") {
- found = true
- break
- }
- }
- if !found {
- spec.Process.Env = append(spec.Process.Env, fmt.Sprintf("HOSTNAME=%s", spec.Hostname))
- }
-
- return configureNetwork, configureNetworks, nil
-}
-
-// Run runs the specified command in the container's root filesystem.
-func (b *Builder) Run(command []string, options RunOptions) error {
- p, err := ioutil.TempDir("", Package)
- if err != nil {
- return errors.Wrapf(err, "run: error creating temporary directory under %q", os.TempDir())
- }
- // On some hosts like AH, /tmp is a symlink and we need an
- // absolute path.
- path, err := filepath.EvalSymlinks(p)
- if err != nil {
- return errors.Wrapf(err, "run: error evaluating %q for symbolic links", p)
- }
- logrus.Debugf("using %q to hold bundle data", path)
- defer func() {
- if err2 := os.RemoveAll(path); err2 != nil {
- logrus.Errorf("error removing %q: %v", path, err2)
- }
- }()
-
- gp, err := generate.New("linux")
- if err != nil {
- return errors.Wrapf(err, "error generating new 'linux' runtime spec")
- }
- g := &gp
-
- isolation := options.Isolation
- if isolation == IsolationDefault {
- isolation = b.Isolation
- if isolation == IsolationDefault {
- isolation = IsolationOCI
- }
- }
- if err := checkAndOverrideIsolationOptions(isolation, &options); err != nil {
- return err
- }
-
- b.configureEnvironment(g, options)
-
- if b.CommonBuildOpts == nil {
- return errors.Errorf("Invalid format on container you must recreate the container")
- }
-
- if err := addCommonOptsToSpec(b.CommonBuildOpts, g); err != nil {
- return err
- }
-
- if options.WorkingDir != "" {
- g.SetProcessCwd(options.WorkingDir)
- } else if b.WorkDir() != "" {
- g.SetProcessCwd(b.WorkDir())
- }
- setupSelinux(g, b.ProcessLabel, b.MountLabel)
- mountPoint, err := b.Mount(b.MountLabel)
- if err != nil {
- return errors.Wrapf(err, "error mounting container %q", b.ContainerID)
- }
- defer func() {
- if err := b.Unmount(); err != nil {
- logrus.Errorf("error unmounting container: %v", err)
- }
- }()
- g.SetRootPath(mountPoint)
- if len(command) > 0 {
- command = runLookupPath(g, command)
- g.SetProcessArgs(command)
- } else {
- g.SetProcessArgs(nil)
- }
-
- setupMaskedPaths(g)
- setupReadOnlyPaths(g)
-
- setupTerminal(g, options.Terminal, options.TerminalSize)
-
- configureNetwork, configureNetworks, err := b.configureNamespaces(g, options)
- if err != nil {
- return err
- }
-
- if err := b.configureUIDGID(g, mountPoint, options); err != nil {
- return err
- }
-
- g.SetProcessApparmorProfile(b.CommonBuildOpts.ApparmorProfile)
-
- // Now grab the spec from the generator. Set the generator to nil so that future contributors
- // will quickly be able to tell that they're supposed to be modifying the spec directly from here.
- spec := g.Config
- g = nil
-
- logrus.Debugf("ensuring working directory %q exists", filepath.Join(mountPoint, spec.Process.Cwd))
- if err = os.MkdirAll(filepath.Join(mountPoint, spec.Process.Cwd), 0755); err != nil {
- return errors.Wrapf(err, "error ensuring working directory %q exists", spec.Process.Cwd)
- }
-
- // Set the seccomp configuration using the specified profile name. Some syscalls are
- // allowed if certain capabilities are to be granted (example: CAP_SYS_CHROOT and chroot),
- // so we sorted out the capabilities lists first.
- if err = setupSeccomp(spec, b.CommonBuildOpts.SeccompProfilePath); err != nil {
- return err
- }
-
- // Figure out who owns files that will appear to be owned by UID/GID 0 in the container.
- rootUID, rootGID, err := util.GetHostRootIDs(spec)
- if err != nil {
- return err
- }
- rootIDPair := &idtools.IDPair{UID: int(rootUID), GID: int(rootGID)}
-
- bindFiles := make(map[string]string)
- namespaceOptions := append(b.NamespaceOptions, options.NamespaceOptions...)
- volumes := b.Volumes()
-
- if !contains(volumes, "/etc/hosts") {
- hostFile, err := b.generateHosts(path, spec.Hostname, b.CommonBuildOpts.AddHost, rootIDPair)
- if err != nil {
- return err
- }
- bindFiles["/etc/hosts"] = hostFile
- }
-
- if !contains(volumes, "/etc/resolv.conf") {
- resolvFile, err := b.addNetworkConfig(path, "/etc/resolv.conf", rootIDPair, b.CommonBuildOpts.DNSServers, b.CommonBuildOpts.DNSSearch, b.CommonBuildOpts.DNSOptions)
- if err != nil {
- return err
- }
- bindFiles["/etc/resolv.conf"] = resolvFile
- }
-
- err = b.setupMounts(mountPoint, spec, path, options.Mounts, bindFiles, volumes, b.CommonBuildOpts.Volumes, b.CommonBuildOpts.ShmSize, namespaceOptions)
- if err != nil {
- return errors.Wrapf(err, "error resolving mountpoints for container %q", b.ContainerID)
- }
-
- if options.CNIConfigDir == "" {
- options.CNIConfigDir = b.CNIConfigDir
- if b.CNIConfigDir == "" {
- options.CNIConfigDir = util.DefaultCNIConfigDir
- }
- }
- if options.CNIPluginPath == "" {
- options.CNIPluginPath = b.CNIPluginPath
- if b.CNIPluginPath == "" {
- options.CNIPluginPath = util.DefaultCNIPluginPath
- }
- }
-
- switch isolation {
- case IsolationOCI:
- var moreCreateArgs []string
- if options.NoPivot {
- moreCreateArgs = []string{"--no-pivot"}
- } else {
- moreCreateArgs = nil
- }
- err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, moreCreateArgs, spec, mountPoint, path, Package+"-"+filepath.Base(path))
- case IsolationChroot:
- err = chroot.RunUsingChroot(spec, path, options.Stdin, options.Stdout, options.Stderr)
- case IsolationOCIRootless:
- moreCreateArgs := []string{"--no-new-keyring"}
- if options.NoPivot {
- moreCreateArgs = append(moreCreateArgs, "--no-pivot")
- }
- if err := setupRootlessSpecChanges(spec, path, rootUID, rootGID); err != nil {
- return err
- }
- err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, moreCreateArgs, spec, mountPoint, path, Package+"-"+filepath.Base(path))
- default:
- err = errors.Errorf("don't know how to run this command")
- }
- return err
-}
-
-func contains(volumes []string, v string) bool {
- for _, i := range volumes {
- if i == v {
- return true
- }
- }
- return false
-}
-
-func checkAndOverrideIsolationOptions(isolation Isolation, options *RunOptions) error {
- switch isolation {
- case IsolationOCIRootless:
- if ns := options.NamespaceOptions.Find(string(specs.IPCNamespace)); ns == nil || ns.Host {
- logrus.Debugf("Forcing use of an IPC namespace.")
- }
- options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.IPCNamespace)})
- _, err := exec.LookPath("slirp4netns")
- hostNetworking := err != nil
- networkNamespacePath := ""
- if ns := options.NamespaceOptions.Find(string(specs.NetworkNamespace)); ns != nil {
- hostNetworking = ns.Host
- networkNamespacePath = ns.Path
- if !hostNetworking && networkNamespacePath != "" && !filepath.IsAbs(networkNamespacePath) {
- logrus.Debugf("Disabling network namespace configuration.")
- networkNamespacePath = ""
- }
- }
- options.NamespaceOptions.AddOrReplace(NamespaceOption{
- Name: string(specs.NetworkNamespace),
- Host: hostNetworking,
- Path: networkNamespacePath,
- })
- if ns := options.NamespaceOptions.Find(string(specs.PIDNamespace)); ns == nil || ns.Host {
- logrus.Debugf("Forcing use of a PID namespace.")
- }
- options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.PIDNamespace), Host: false})
- if ns := options.NamespaceOptions.Find(string(specs.UserNamespace)); ns == nil || ns.Host {
- logrus.Debugf("Forcing use of a user namespace.")
- }
- options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.UserNamespace)})
- if ns := options.NamespaceOptions.Find(string(specs.UTSNamespace)); ns != nil && !ns.Host {
- logrus.Debugf("Disabling UTS namespace.")
- }
- options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.UTSNamespace), Host: true})
- case IsolationOCI:
- pidns := options.NamespaceOptions.Find(string(specs.PIDNamespace))
- userns := options.NamespaceOptions.Find(string(specs.UserNamespace))
- if (pidns == nil || pidns.Host) && (userns != nil && !userns.Host) {
- return fmt.Errorf("not allowed to mix host PID namespace with container user namespace")
- }
- }
- return nil
-}
-
-func setupRootlessSpecChanges(spec *specs.Spec, bundleDir string, rootUID, rootGID uint32) error {
- spec.Hostname = ""
- spec.Process.User.AdditionalGids = nil
- spec.Linux.Resources = nil
-
- emptyDir := filepath.Join(bundleDir, "empty")
- if err := os.Mkdir(emptyDir, 0); err != nil {
- return errors.Wrapf(err, "error creating %q", emptyDir)
- }
-
- // Replace /sys with a read-only bind mount.
- mounts := []specs.Mount{
- {
- Source: "/dev",
- Destination: "/dev",
- Type: "tmpfs",
- Options: []string{"private", "strictatime", "noexec", "nosuid", "mode=755", "size=65536k"},
- },
- {
- Source: "mqueue",
- Destination: "/dev/mqueue",
- Type: "mqueue",
- Options: []string{"private", "nodev", "noexec", "nosuid"},
- },
- {
- Source: "pts",
- Destination: "/dev/pts",
- Type: "devpts",
- Options: []string{"private", "noexec", "nosuid", "newinstance", "ptmxmode=0666", "mode=0620"},
- },
- {
- Source: "shm",
- Destination: "/dev/shm",
- Type: "tmpfs",
- Options: []string{"private", "nodev", "noexec", "nosuid", "mode=1777", "size=65536k"},
- },
- {
- Source: "/proc",
- Destination: "/proc",
- Type: "proc",
- Options: []string{"private", "nodev", "noexec", "nosuid"},
- },
- {
- Source: "/sys",
- Destination: "/sys",
- Type: "bind",
- Options: []string{bind.NoBindOption, "rbind", "private", "nodev", "noexec", "nosuid", "ro"},
- },
- }
- // Cover up /sys/fs/cgroup and /sys/fs/selinux, if they exist in our source for /sys.
- if _, err := os.Stat("/sys/fs/cgroup"); err == nil {
- spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/cgroup")
- }
- if _, err := os.Stat("/sys/fs/selinux"); err == nil {
- spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/selinux")
- }
- // Keep anything that isn't under /dev, /proc, or /sys.
- for i := range spec.Mounts {
- if spec.Mounts[i].Destination == "/dev" || strings.HasPrefix(spec.Mounts[i].Destination, "/dev/") ||
- spec.Mounts[i].Destination == "/proc" || strings.HasPrefix(spec.Mounts[i].Destination, "/proc/") ||
- spec.Mounts[i].Destination == "/sys" || strings.HasPrefix(spec.Mounts[i].Destination, "/sys/") {
- continue
- }
- mounts = append(mounts, spec.Mounts[i])
- }
- spec.Mounts = mounts
- return nil
-}
-
-type runUsingRuntimeSubprocOptions struct {
- Options RunOptions
- Spec *specs.Spec
- RootPath string
- BundlePath string
- ConfigureNetwork bool
- ConfigureNetworks []string
- MoreCreateArgs []string
- ContainerName string
- Isolation Isolation
-}
-
-func (b *Builder) runUsingRuntimeSubproc(isolation Isolation, options RunOptions, configureNetwork bool, configureNetworks, moreCreateArgs []string, spec *specs.Spec, rootPath, bundlePath, containerName string) (err error) {
- var confwg sync.WaitGroup
- config, conferr := json.Marshal(runUsingRuntimeSubprocOptions{
- Options: options,
- Spec: spec,
- RootPath: rootPath,
- BundlePath: bundlePath,
- ConfigureNetwork: configureNetwork,
- ConfigureNetworks: configureNetworks,
- MoreCreateArgs: moreCreateArgs,
- ContainerName: containerName,
- Isolation: isolation,
- })
- if conferr != nil {
- return errors.Wrapf(conferr, "error encoding configuration for %q", runUsingRuntimeCommand)
- }
- cmd := reexec.Command(runUsingRuntimeCommand)
- cmd.Dir = bundlePath
- cmd.Stdin = options.Stdin
- if cmd.Stdin == nil {
- cmd.Stdin = os.Stdin
- }
- cmd.Stdout = options.Stdout
- if cmd.Stdout == nil {
- cmd.Stdout = os.Stdout
- }
- cmd.Stderr = options.Stderr
- if cmd.Stderr == nil {
- cmd.Stderr = os.Stderr
- }
- cmd.Env = append(os.Environ(), fmt.Sprintf("LOGLEVEL=%d", logrus.GetLevel()))
- preader, pwriter, err := os.Pipe()
- if err != nil {
- return errors.Wrapf(err, "error creating configuration pipe")
- }
- confwg.Add(1)
- go func() {
- _, conferr = io.Copy(pwriter, bytes.NewReader(config))
- if conferr != nil {
- conferr = errors.Wrapf(conferr, "error while copying configuration down pipe to child process")
- }
- confwg.Done()
- }()
- cmd.ExtraFiles = append([]*os.File{preader}, cmd.ExtraFiles...)
- defer preader.Close()
- defer pwriter.Close()
- err = cmd.Run()
- if err != nil {
- err = errors.Wrapf(err, "error while running runtime")
- }
- confwg.Wait()
- if err == nil {
- return conferr
- }
- if conferr != nil {
- logrus.Debugf("%v", conferr)
- }
- return err
-}
-
-func init() {
- reexec.Register(runUsingRuntimeCommand, runUsingRuntimeMain)
-}
-
-func runUsingRuntimeMain() {
- var options runUsingRuntimeSubprocOptions
- // Set logging.
- if level := os.Getenv("LOGLEVEL"); level != "" {
- if ll, err := strconv.Atoi(level); err == nil {
- logrus.SetLevel(logrus.Level(ll))
- }
- }
- // Unpack our configuration.
- confPipe := os.NewFile(3, "confpipe")
- if confPipe == nil {
- fmt.Fprintf(os.Stderr, "error reading options pipe\n")
- os.Exit(1)
- }
- defer confPipe.Close()
- if err := json.NewDecoder(confPipe).Decode(&options); err != nil {
- fmt.Fprintf(os.Stderr, "error decoding options: %v\n", err)
- os.Exit(1)
- }
- // Set ourselves up to read the container's exit status. We're doing this in a child process
- // so that we won't mess with the setting in a caller of the library. This stubs to OS specific
- // calls
- if err := setChildProcess(); err != nil {
- os.Exit(1)
- }
- // Run the container, start to finish.
- status, err := runUsingRuntime(options.Isolation, options.Options, options.ConfigureNetwork, options.ConfigureNetworks, options.MoreCreateArgs, options.Spec, options.RootPath, options.BundlePath, options.ContainerName)
- if err != nil {
- fmt.Fprintf(os.Stderr, "error running container: %v\n", err)
- os.Exit(1)
- }
- // Pass the container's exit status back to the caller by exiting with the same status.
- if status.Exited() {
- os.Exit(status.ExitStatus())
- } else if status.Signaled() {
- fmt.Fprintf(os.Stderr, "container exited on %s\n", status.Signal())
- os.Exit(1)
- }
- os.Exit(1)
-}
-
-func runUsingRuntime(isolation Isolation, options RunOptions, configureNetwork bool, configureNetworks, moreCreateArgs []string, spec *specs.Spec, rootPath, bundlePath, containerName string) (wstatus unix.WaitStatus, err error) {
- // Lock the caller to a single OS-level thread.
- runtime.LockOSThread()
-
- // Set up bind mounts for things that a namespaced user might not be able to get to directly.
- unmountAll, err := bind.SetupIntermediateMountNamespace(spec, bundlePath)
- if unmountAll != nil {
- defer func() {
- if err := unmountAll(); err != nil {
- logrus.Error(err)
- }
- }()
- }
- if err != nil {
- return 1, err
- }
-
- // Write the runtime configuration.
- specbytes, err := json.Marshal(spec)
- if err != nil {
- return 1, errors.Wrapf(err, "error encoding configuration %#v as json", spec)
- }
- if err = ioutils.AtomicWriteFile(filepath.Join(bundlePath, "config.json"), specbytes, 0600); err != nil {
- return 1, errors.Wrapf(err, "error storing runtime configuration in %q", filepath.Join(bundlePath, "config.json"))
- }
-
- logrus.Debugf("config = %v", string(specbytes))
-
- // Decide which runtime to use.
- runtime := options.Runtime
- if runtime == "" {
- runtime = util.Runtime()
- }
-
- // Default to just passing down our stdio.
- getCreateStdio := func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
- return os.Stdin, os.Stdout, os.Stderr
- }
-
- // Figure out how we're doing stdio handling, and create pipes and sockets.
- var stdio sync.WaitGroup
- var consoleListener *net.UnixListener
- var errorFds, closeBeforeReadingErrorFds []int
- stdioPipe := make([][]int, 3)
- copyConsole := false
- copyPipes := false
- finishCopy := make([]int, 2)
- if err = unix.Pipe(finishCopy); err != nil {
- return 1, errors.Wrapf(err, "error creating pipe for notifying to stop stdio")
- }
- finishedCopy := make(chan struct{})
- if spec.Process != nil {
- if spec.Process.Terminal {
- copyConsole = true
- // Create a listening socket for accepting the container's terminal's PTY master.
- socketPath := filepath.Join(bundlePath, "console.sock")
- consoleListener, err = net.ListenUnix("unix", &net.UnixAddr{Name: socketPath, Net: "unix"})
- if err != nil {
- return 1, errors.Wrapf(err, "error creating socket %q to receive terminal descriptor", consoleListener.Addr())
- }
- // Add console socket arguments.
- moreCreateArgs = append(moreCreateArgs, "--console-socket", socketPath)
- } else {
- copyPipes = true
- // Figure out who should own the pipes.
- uid, gid, err := util.GetHostRootIDs(spec)
- if err != nil {
- return 1, err
- }
- // Create stdio pipes.
- if stdioPipe, err = runMakeStdioPipe(int(uid), int(gid)); err != nil {
- return 1, err
- }
- errorFds = []int{stdioPipe[unix.Stdout][0], stdioPipe[unix.Stderr][0]}
- closeBeforeReadingErrorFds = []int{stdioPipe[unix.Stdout][1], stdioPipe[unix.Stderr][1]}
- // Set stdio to our pipes.
- getCreateStdio = func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
- stdin := os.NewFile(uintptr(stdioPipe[unix.Stdin][0]), "/dev/stdin")
- stdout := os.NewFile(uintptr(stdioPipe[unix.Stdout][1]), "/dev/stdout")
- stderr := os.NewFile(uintptr(stdioPipe[unix.Stderr][1]), "/dev/stderr")
- return stdin, stdout, stderr
- }
- }
- } else {
- if options.Quiet {
- // Discard stdout.
- getCreateStdio = func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
- return os.Stdin, nil, os.Stderr
- }
- }
- }
-
- // Build the commands that we'll execute.
- pidFile := filepath.Join(bundlePath, "pid")
- args := append(append(append(options.Args, "create", "--bundle", bundlePath, "--pid-file", pidFile), moreCreateArgs...), containerName)
- create := exec.Command(runtime, args...)
- create.Dir = bundlePath
- stdin, stdout, stderr := getCreateStdio()
- create.Stdin, create.Stdout, create.Stderr = stdin, stdout, stderr
- if create.SysProcAttr == nil {
- create.SysProcAttr = &syscall.SysProcAttr{}
- }
-
- args = append(options.Args, "start", containerName)
- start := exec.Command(runtime, args...)
- start.Dir = bundlePath
- start.Stderr = os.Stderr
-
- args = append(options.Args, "kill", containerName)
- kill := exec.Command(runtime, args...)
- kill.Dir = bundlePath
- kill.Stderr = os.Stderr
-
- args = append(options.Args, "delete", containerName)
- del := exec.Command(runtime, args...)
- del.Dir = bundlePath
- del.Stderr = os.Stderr
-
- // Actually create the container.
- logrus.Debugf("Running %q", create.Args)
- err = create.Run()
- if err != nil {
- return 1, errors.Wrapf(err, "error creating container for %v: %s", spec.Process.Args, runCollectOutput(errorFds, closeBeforeReadingErrorFds))
- }
- defer func() {
- err2 := del.Run()
- if err2 != nil {
- if err == nil {
- err = errors.Wrapf(err2, "error deleting container")
- } else {
- logrus.Infof("error deleting container: %v", err2)
- }
- }
- }()
-
- // Make sure we read the container's exit status when it exits.
- pidValue, err := ioutil.ReadFile(pidFile)
- if err != nil {
- return 1, errors.Wrapf(err, "error reading pid from %q", pidFile)
- }
- pid, err := strconv.Atoi(strings.TrimSpace(string(pidValue)))
- if err != nil {
- return 1, errors.Wrapf(err, "error parsing pid %s as a number", string(pidValue))
- }
- var reaping sync.WaitGroup
- reaping.Add(1)
- go func() {
- defer reaping.Done()
- var err error
- _, err = unix.Wait4(pid, &wstatus, 0, nil)
- if err != nil {
- wstatus = 0
- logrus.Errorf("error waiting for container child process %d: %v\n", pid, err)
- }
- }()
-
- if configureNetwork {
- teardown, err := runConfigureNetwork(isolation, options, configureNetworks, pid, containerName, spec.Process.Args)
- if teardown != nil {
- defer teardown()
- }
- if err != nil {
- return 1, err
- }
- }
-
- if copyPipes {
- // We don't need the ends of the pipes that belong to the container.
- stdin.Close()
- if stdout != nil {
- stdout.Close()
- }
- stderr.Close()
- }
-
- // Handle stdio for the container in the background.
- stdio.Add(1)
- go runCopyStdio(&stdio, copyPipes, stdioPipe, copyConsole, consoleListener, finishCopy, finishedCopy, spec)
-
- // Start the container.
- logrus.Debugf("Running %q", start.Args)
- err = start.Run()
- if err != nil {
- return 1, errors.Wrapf(err, "error starting container")
- }
- stopped := false
- defer func() {
- if !stopped {
- err2 := kill.Run()
- if err2 != nil {
- if err == nil {
- err = errors.Wrapf(err2, "error stopping container")
- } else {
- logrus.Infof("error stopping container: %v", err2)
- }
- }
- }
- }()
-
- // Wait for the container to exit.
- for {
- now := time.Now()
- var state specs.State
- args = append(options.Args, "state", containerName)
- stat := exec.Command(runtime, args...)
- stat.Dir = bundlePath
- stat.Stderr = os.Stderr
- stateOutput, stateErr := stat.Output()
- if stateErr != nil {
- return 1, errors.Wrapf(stateErr, "error reading container state")
- }
- if err = json.Unmarshal(stateOutput, &state); err != nil {
- return 1, errors.Wrapf(stateErr, "error parsing container state %q", string(stateOutput))
- }
- switch state.Status {
- case "running":
- case "stopped":
- stopped = true
- default:
- return 1, errors.Errorf("container status unexpectedly changed to %q", state.Status)
- }
- if stopped {
- break
- }
- select {
- case <-finishedCopy:
- stopped = true
- case <-time.After(time.Until(now.Add(100 * time.Millisecond))):
- continue
- }
- if stopped {
- break
- }
- }
-
- // Close the writing end of the stop-handling-stdio notification pipe.
- unix.Close(finishCopy[1])
- // Wait for the stdio copy goroutine to flush.
- stdio.Wait()
- // Wait until we finish reading the exit status.
- reaping.Wait()
-
- return wstatus, nil
-}
-
-func runCollectOutput(fds, closeBeforeReadingFds []int) string {
- for _, fd := range closeBeforeReadingFds {
- unix.Close(fd)
- }
- var b bytes.Buffer
- buf := make([]byte, 8192)
- for _, fd := range fds {
- nread, err := unix.Read(fd, buf)
- if err != nil {
- if errno, isErrno := err.(syscall.Errno); isErrno {
- switch errno {
- default:
- logrus.Errorf("error reading from pipe %d: %v", fd, err)
- case syscall.EINTR, syscall.EAGAIN:
- }
- } else {
- logrus.Errorf("unable to wait for data from pipe %d: %v", fd, err)
- }
- continue
- }
- for nread > 0 {
- r := buf[:nread]
- if nwritten, err := b.Write(r); err != nil || nwritten != len(r) {
- if nwritten != len(r) {
- logrus.Errorf("error buffering data from pipe %d: %v", fd, err)
- break
- }
- }
- nread, err = unix.Read(fd, buf)
- if err != nil {
- if errno, isErrno := err.(syscall.Errno); isErrno {
- switch errno {
- default:
- logrus.Errorf("error reading from pipe %d: %v", fd, err)
- case syscall.EINTR, syscall.EAGAIN:
- }
- } else {
- logrus.Errorf("unable to wait for data from pipe %d: %v", fd, err)
- }
- break
- }
- }
- }
- return b.String()
-}
-func setupRootlessNetwork(pid int) (teardown func(), err error) {
- slirp4netns, err := exec.LookPath("slirp4netns")
- if err != nil {
- return nil, errors.Wrapf(err, "cannot find slirp4netns")
- }
-
- rootlessSlirpSyncR, rootlessSlirpSyncW, err := os.Pipe()
- if err != nil {
- return nil, errors.Wrapf(err, "cannot create slirp4netns sync pipe")
- }
- defer rootlessSlirpSyncR.Close()
-
- // Be sure there are no fds inherited to slirp4netns except the sync pipe
- files, err := ioutil.ReadDir("/proc/self/fd")
- if err != nil {
- return nil, errors.Wrapf(err, "cannot list open fds")
- }
- for _, f := range files {
- fd, err := strconv.Atoi(f.Name())
- if err != nil {
- return nil, errors.Wrapf(err, "cannot parse fd")
- }
- if fd == int(rootlessSlirpSyncW.Fd()) {
- continue
- }
- unix.CloseOnExec(fd)
- }
-
- cmd := exec.Command(slirp4netns, "--mtu", "65520", "-r", "3", "-c", fmt.Sprintf("%d", pid), "tap0")
- cmd.Stdin, cmd.Stdout, cmd.Stderr = nil, nil, nil
- cmd.ExtraFiles = []*os.File{rootlessSlirpSyncW}
-
- err = cmd.Start()
- rootlessSlirpSyncW.Close()
- if err != nil {
- return nil, errors.Wrapf(err, "cannot start slirp4netns")
- }
-
- b := make([]byte, 1)
- for {
- if err := rootlessSlirpSyncR.SetDeadline(time.Now().Add(1 * time.Second)); err != nil {
- return nil, errors.Wrapf(err, "error setting slirp4netns pipe timeout")
- }
- if _, err := rootlessSlirpSyncR.Read(b); err == nil {
- break
- } else {
- if os.IsTimeout(err) {
- // Check if the process is still running.
- var status syscall.WaitStatus
- _, err := syscall.Wait4(cmd.Process.Pid, &status, syscall.WNOHANG, nil)
- if err != nil {
- return nil, errors.Wrapf(err, "failed to read slirp4netns process status")
- }
- if status.Exited() || status.Signaled() {
- return nil, errors.New("slirp4netns failed")
- }
-
- continue
- }
- return nil, errors.Wrapf(err, "failed to read from slirp4netns sync pipe")
- }
- }
-
- return func() {
- cmd.Process.Kill()
- cmd.Wait()
- }, nil
-}
-
-func runConfigureNetwork(isolation Isolation, options RunOptions, configureNetworks []string, pid int, containerName string, command []string) (teardown func(), err error) {
- var netconf, undo []*libcni.NetworkConfigList
-
- if isolation == IsolationOCIRootless {
- if ns := options.NamespaceOptions.Find(string(specs.NetworkNamespace)); ns != nil && !ns.Host && ns.Path == "" {
- return setupRootlessNetwork(pid)
- }
- }
- // Scan for CNI configuration files.
- confdir := options.CNIConfigDir
- files, err := libcni.ConfFiles(confdir, []string{".conf"})
- if err != nil {
- return nil, errors.Wrapf(err, "error finding CNI networking configuration files named *.conf in directory %q", confdir)
- }
- lists, err := libcni.ConfFiles(confdir, []string{".conflist"})
- if err != nil {
- return nil, errors.Wrapf(err, "error finding CNI networking configuration list files named *.conflist in directory %q", confdir)
- }
- logrus.Debugf("CNI network configuration file list: %#v", append(files, lists...))
- // Read the CNI configuration files.
- for _, file := range files {
- nc, err := libcni.ConfFromFile(file)
- if err != nil {
- return nil, errors.Wrapf(err, "error loading networking configuration from file %q for %v", file, command)
- }
- if len(configureNetworks) > 0 && nc.Network != nil && (nc.Network.Name == "" || !util.StringInSlice(nc.Network.Name, configureNetworks)) {
- if nc.Network.Name == "" {
- logrus.Debugf("configuration in %q has no name, skipping it", file)
- } else {
- logrus.Debugf("configuration in %q has name %q, skipping it", file, nc.Network.Name)
- }
- continue
- }
- cl, err := libcni.ConfListFromConf(nc)
- if err != nil {
- return nil, errors.Wrapf(err, "error converting networking configuration from file %q for %v", file, command)
- }
- logrus.Debugf("using network configuration from %q", file)
- netconf = append(netconf, cl)
- }
- for _, list := range lists {
- cl, err := libcni.ConfListFromFile(list)
- if err != nil {
- return nil, errors.Wrapf(err, "error loading networking configuration list from file %q for %v", list, command)
- }
- if len(configureNetworks) > 0 && (cl.Name == "" || !util.StringInSlice(cl.Name, configureNetworks)) {
- if cl.Name == "" {
- logrus.Debugf("configuration list in %q has no name, skipping it", list)
- } else {
- logrus.Debugf("configuration list in %q has name %q, skipping it", list, cl.Name)
- }
- continue
- }
- logrus.Debugf("using network configuration list from %q", list)
- netconf = append(netconf, cl)
- }
- // Make sure we can access the container's network namespace,
- // even after it exits, to successfully tear down the
- // interfaces. Ensure this by opening a handle to the network
- // namespace, and using our copy to both configure and
- // deconfigure it.
- netns := fmt.Sprintf("/proc/%d/ns/net", pid)
- netFD, err := unix.Open(netns, unix.O_RDONLY, 0)
- if err != nil {
- return nil, errors.Wrapf(err, "error opening network namespace for %v", command)
- }
- mynetns := fmt.Sprintf("/proc/%d/fd/%d", unix.Getpid(), netFD)
- // Build our search path for the plugins.
- pluginPaths := strings.Split(options.CNIPluginPath, string(os.PathListSeparator))
- cni := libcni.CNIConfig{Path: pluginPaths}
- // Configure the interfaces.
- rtconf := make(map[*libcni.NetworkConfigList]*libcni.RuntimeConf)
- teardown = func() {
- for _, nc := range undo {
- if err = cni.DelNetworkList(context.Background(), nc, rtconf[nc]); err != nil {
- logrus.Errorf("error cleaning up network %v for %v: %v", rtconf[nc].IfName, command, err)
- }
- }
- unix.Close(netFD)
- }
- for i, nc := range netconf {
- // Build the runtime config for use with this network configuration.
- rtconf[nc] = &libcni.RuntimeConf{
- ContainerID: containerName,
- NetNS: mynetns,
- IfName: fmt.Sprintf("if%d", i),
- Args: [][2]string{},
- CapabilityArgs: map[string]interface{}{},
- }
- // Bring it up.
- _, err := cni.AddNetworkList(context.Background(), nc, rtconf[nc])
- if err != nil {
- return teardown, errors.Wrapf(err, "error configuring network list %v for %v", rtconf[nc].IfName, command)
- }
- // Add it to the list of networks to take down when the container process exits.
- undo = append([]*libcni.NetworkConfigList{nc}, undo...)
- }
- return teardown, nil
-}
-
-func runCopyStdio(stdio *sync.WaitGroup, copyPipes bool, stdioPipe [][]int, copyConsole bool, consoleListener *net.UnixListener, finishCopy []int, finishedCopy chan struct{}, spec *specs.Spec) {
- defer func() {
- unix.Close(finishCopy[0])
- if copyPipes {
- unix.Close(stdioPipe[unix.Stdin][1])
- unix.Close(stdioPipe[unix.Stdout][0])
- unix.Close(stdioPipe[unix.Stderr][0])
- }
- stdio.Done()
- finishedCopy <- struct{}{}
- }()
- // Map describing where data on an incoming descriptor should go.
- relayMap := make(map[int]int)
- // Map describing incoming and outgoing descriptors.
- readDesc := make(map[int]string)
- writeDesc := make(map[int]string)
- // Buffers.
- relayBuffer := make(map[int]*bytes.Buffer)
- // Set up the terminal descriptor or pipes for polling.
- if copyConsole {
- // Accept a connection over our listening socket.
- fd, err := runAcceptTerminal(consoleListener, spec.Process.ConsoleSize)
- if err != nil {
- logrus.Errorf("%v", err)
- return
- }
- terminalFD := fd
- // Input from our stdin, output from the terminal descriptor.
- relayMap[unix.Stdin] = terminalFD
- readDesc[unix.Stdin] = "stdin"
- relayBuffer[terminalFD] = new(bytes.Buffer)
- writeDesc[terminalFD] = "container terminal input"
- relayMap[terminalFD] = unix.Stdout
- readDesc[terminalFD] = "container terminal output"
- relayBuffer[unix.Stdout] = new(bytes.Buffer)
- writeDesc[unix.Stdout] = "output"
- // Set our terminal's mode to raw, to pass handling of special
- // terminal input to the terminal in the container.
- if terminal.IsTerminal(unix.Stdin) {
- if state, err := terminal.MakeRaw(unix.Stdin); err != nil {
- logrus.Warnf("error setting terminal state: %v", err)
- } else {
- defer func() {
- if err = terminal.Restore(unix.Stdin, state); err != nil {
- logrus.Errorf("unable to restore terminal state: %v", err)
- }
- }()
- }
- }
- }
- if copyPipes {
- // Input from our stdin, output from the stdout and stderr pipes.
- relayMap[unix.Stdin] = stdioPipe[unix.Stdin][1]
- readDesc[unix.Stdin] = "stdin"
- relayBuffer[stdioPipe[unix.Stdin][1]] = new(bytes.Buffer)
- writeDesc[stdioPipe[unix.Stdin][1]] = "container stdin"
- relayMap[stdioPipe[unix.Stdout][0]] = unix.Stdout
- readDesc[stdioPipe[unix.Stdout][0]] = "container stdout"
- relayBuffer[unix.Stdout] = new(bytes.Buffer)
- writeDesc[unix.Stdout] = "stdout"
- relayMap[stdioPipe[unix.Stderr][0]] = unix.Stderr
- readDesc[stdioPipe[unix.Stderr][0]] = "container stderr"
- relayBuffer[unix.Stderr] = new(bytes.Buffer)
- writeDesc[unix.Stderr] = "stderr"
- }
- // Set our reading descriptors to non-blocking.
- for rfd, wfd := range relayMap {
- if err := unix.SetNonblock(rfd, true); err != nil {
- logrus.Errorf("error setting %s to nonblocking: %v", readDesc[rfd], err)
- return
- }
- if err := unix.SetNonblock(wfd, false); err != nil {
- logrus.Errorf("error setting descriptor %d (%s) blocking: %v", wfd, writeDesc[wfd], err)
- }
- }
- // Pass data back and forth.
- pollTimeout := -1
- for len(relayMap) > 0 {
- // Start building the list of descriptors to poll.
- pollFds := make([]unix.PollFd, 0, len(relayMap)+1)
- // Poll for a notification that we should stop handling stdio.
- pollFds = append(pollFds, unix.PollFd{Fd: int32(finishCopy[0]), Events: unix.POLLIN | unix.POLLHUP})
- // Poll on our reading descriptors.
- for rfd := range relayMap {
- pollFds = append(pollFds, unix.PollFd{Fd: int32(rfd), Events: unix.POLLIN | unix.POLLHUP})
- }
- buf := make([]byte, 8192)
- // Wait for new data from any input descriptor, or a notification that we're done.
- _, err := unix.Poll(pollFds, pollTimeout)
- if !util.LogIfNotRetryable(err, fmt.Sprintf("error waiting for stdio/terminal data to relay: %v", err)) {
- return
- }
- removes := make(map[int]struct{})
- for _, pollFd := range pollFds {
- // If this descriptor's just been closed from the other end, mark it for
- // removal from the set that we're checking for.
- if pollFd.Revents&unix.POLLHUP == unix.POLLHUP {
- removes[int(pollFd.Fd)] = struct{}{}
- }
- // If the descriptor was closed elsewhere, remove it from our list.
- if pollFd.Revents&unix.POLLNVAL != 0 {
- logrus.Debugf("error polling descriptor %s: closed?", readDesc[int(pollFd.Fd)])
- removes[int(pollFd.Fd)] = struct{}{}
- }
- // If the POLLIN flag isn't set, then there's no data to be read from this descriptor.
- if pollFd.Revents&unix.POLLIN == 0 {
- // If we're using pipes and it's our stdin and it's closed, close the writing
- // end of the corresponding pipe.
- if copyPipes && int(pollFd.Fd) == unix.Stdin && pollFd.Revents&unix.POLLHUP != 0 {
- unix.Close(stdioPipe[unix.Stdin][1])
- stdioPipe[unix.Stdin][1] = -1
- }
- continue
- }
- // Read whatever there is to be read.
- readFD := int(pollFd.Fd)
- writeFD, needToRelay := relayMap[readFD]
- if needToRelay {
- n, err := unix.Read(readFD, buf)
- if !util.LogIfNotRetryable(err, fmt.Sprintf("unable to read %s data: %v", readDesc[readFD], err)) {
- return
- }
- // If it's zero-length on our stdin and we're
- // using pipes, it's an EOF, so close the stdin
- // pipe's writing end.
- if n == 0 && copyPipes && int(pollFd.Fd) == unix.Stdin {
- unix.Close(stdioPipe[unix.Stdin][1])
- stdioPipe[unix.Stdin][1] = -1
- }
- if n > 0 {
- // Buffer the data in case we get blocked on where they need to go.
- nwritten, err := relayBuffer[writeFD].Write(buf[:n])
- if err != nil {
- logrus.Debugf("buffer: %v", err)
- continue
- }
- if nwritten != n {
- logrus.Debugf("buffer: expected to buffer %d bytes, wrote %d", n, nwritten)
- continue
- }
- // If this is the last of the data we'll be able to read from this
- // descriptor, read all that there is to read.
- for pollFd.Revents&unix.POLLHUP == unix.POLLHUP {
- nr, err := unix.Read(readFD, buf)
- util.LogIfUnexpectedWhileDraining(err, fmt.Sprintf("read %s: %v", readDesc[readFD], err))
- if nr <= 0 {
- break
- }
- nwritten, err := relayBuffer[writeFD].Write(buf[:nr])
- if err != nil {
- logrus.Debugf("buffer: %v", err)
- break
- }
- if nwritten != nr {
- logrus.Debugf("buffer: expected to buffer %d bytes, wrote %d", nr, nwritten)
- break
- }
- }
- }
- }
- }
- // Try to drain the output buffers. Set the default timeout
- // for the next poll() to 100ms if we still have data to write.
- pollTimeout = -1
- for writeFD := range relayBuffer {
- if relayBuffer[writeFD].Len() > 0 {
- n, err := unix.Write(writeFD, relayBuffer[writeFD].Bytes())
- if !util.LogIfNotRetryable(err, fmt.Sprintf("unable to write %s data: %v", writeDesc[writeFD], err)) {
- return
- }
- if n > 0 {
- relayBuffer[writeFD].Next(n)
- }
- }
- if relayBuffer[writeFD].Len() > 0 {
- pollTimeout = 100
- }
- }
- // Remove any descriptors which we don't need to poll any more from the poll descriptor list.
- for remove := range removes {
- delete(relayMap, remove)
- }
- // If the we-can-return pipe had anything for us, we're done.
- for _, pollFd := range pollFds {
- if int(pollFd.Fd) == finishCopy[0] && pollFd.Revents != 0 {
- // The pipe is closed, indicating that we can stop now.
- return
- }
- }
- }
-}
-
-func runAcceptTerminal(consoleListener *net.UnixListener, terminalSize *specs.Box) (int, error) {
- defer consoleListener.Close()
- c, err := consoleListener.AcceptUnix()
- if err != nil {
- return -1, errors.Wrapf(err, "error accepting socket descriptor connection")
- }
- defer c.Close()
- // Expect a control message over our new connection.
- b := make([]byte, 8192)
- oob := make([]byte, 8192)
- n, oobn, _, _, err := c.ReadMsgUnix(b, oob)
- if err != nil {
- return -1, errors.Wrapf(err, "error reading socket descriptor")
- }
- if n > 0 {
- logrus.Debugf("socket descriptor is for %q", string(b[:n]))
- }
- if oobn > len(oob) {
- return -1, errors.Errorf("too much out-of-bounds data (%d bytes)", oobn)
- }
- // Parse the control message.
- scm, err := unix.ParseSocketControlMessage(oob[:oobn])
- if err != nil {
- return -1, errors.Wrapf(err, "error parsing out-of-bound data as a socket control message")
- }
- logrus.Debugf("control messages: %v", scm)
- // Expect to get a descriptor.
- terminalFD := -1
- for i := range scm {
- fds, err := unix.ParseUnixRights(&scm[i])
- if err != nil {
- return -1, errors.Wrapf(err, "error parsing unix rights control message: %v", &scm[i])
- }
- logrus.Debugf("fds: %v", fds)
- if len(fds) == 0 {
- continue
- }
- terminalFD = fds[0]
- break
- }
- if terminalFD == -1 {
- return -1, errors.Errorf("unable to read terminal descriptor")
- }
- // Set the pseudoterminal's size to the configured size, or our own.
- winsize := &unix.Winsize{}
- if terminalSize != nil {
- // Use configured sizes.
- winsize.Row = uint16(terminalSize.Height)
- winsize.Col = uint16(terminalSize.Width)
- } else {
- if terminal.IsTerminal(unix.Stdin) {
- // Use the size of our terminal.
- if winsize, err = unix.IoctlGetWinsize(unix.Stdin, unix.TIOCGWINSZ); err != nil {
- logrus.Warnf("error reading size of controlling terminal: %v", err)
- winsize.Row = 0
- winsize.Col = 0
- }
- }
- }
- if winsize.Row != 0 && winsize.Col != 0 {
- if err = unix.IoctlSetWinsize(terminalFD, unix.TIOCSWINSZ, winsize); err != nil {
- logrus.Warnf("error setting size of container pseudoterminal: %v", err)
- }
- // FIXME - if we're connected to a terminal, we should
- // be passing the updated terminal size down when we
- // receive a SIGWINCH.
- }
- return terminalFD, nil
-}
-
-// Create pipes to use for relaying stdio.
-func runMakeStdioPipe(uid, gid int) ([][]int, error) {
- stdioPipe := make([][]int, 3)
- for i := range stdioPipe {
- stdioPipe[i] = make([]int, 2)
- if err := unix.Pipe(stdioPipe[i]); err != nil {
- return nil, errors.Wrapf(err, "error creating pipe for container FD %d", i)
- }
- }
- if err := unix.Fchown(stdioPipe[unix.Stdin][0], uid, gid); err != nil {
- return nil, errors.Wrapf(err, "error setting owner of stdin pipe descriptor")
- }
- if err := unix.Fchown(stdioPipe[unix.Stdout][1], uid, gid); err != nil {
- return nil, errors.Wrapf(err, "error setting owner of stdout pipe descriptor")
- }
- if err := unix.Fchown(stdioPipe[unix.Stderr][1], uid, gid); err != nil {
- return nil, errors.Wrapf(err, "error setting owner of stderr pipe descriptor")
- }
- return stdioPipe, nil
-}
diff --git a/vendor/github.com/containers/buildah/run_linux.go b/vendor/github.com/containers/buildah/run_linux.go
index a7519a092..8597e3656 100644
--- a/vendor/github.com/containers/buildah/run_linux.go
+++ b/vendor/github.com/containers/buildah/run_linux.go
@@ -3,9 +3,44 @@
package buildah
import (
+ "bytes"
+ "context"
+ "encoding/json"
"fmt"
- "golang.org/x/sys/unix"
+ "io"
+ "io/ioutil"
+ "net"
"os"
+ "os/exec"
+ "path/filepath"
+ "runtime"
+ "strconv"
+ "strings"
+ "sync"
+ "syscall"
+ "time"
+
+ "github.com/containernetworking/cni/libcni"
+ "github.com/containers/buildah/bind"
+ "github.com/containers/buildah/chroot"
+ "github.com/containers/buildah/pkg/secrets"
+ "github.com/containers/buildah/pkg/unshare"
+ "github.com/containers/buildah/util"
+ "github.com/containers/storage/pkg/idtools"
+ "github.com/containers/storage/pkg/ioutils"
+ "github.com/containers/storage/pkg/reexec"
+ "github.com/containers/storage/pkg/stringid"
+ "github.com/docker/go-units"
+ "github.com/docker/libnetwork/resolvconf"
+ "github.com/docker/libnetwork/types"
+ "github.com/opencontainers/go-digest"
+ "github.com/opencontainers/runtime-spec/specs-go"
+ "github.com/opencontainers/runtime-tools/generate"
+ "github.com/opencontainers/selinux/go-selinux/label"
+ "github.com/pkg/errors"
+ "github.com/sirupsen/logrus"
+ "golang.org/x/crypto/ssh/terminal"
+ "golang.org/x/sys/unix"
)
func setChildProcess() error {
@@ -15,3 +50,1988 @@ func setChildProcess() error {
}
return nil
}
+
+// Run runs the specified command in the container's root filesystem.
+func (b *Builder) Run(command []string, options RunOptions) error {
+ p, err := ioutil.TempDir("", Package)
+ if err != nil {
+ return errors.Wrapf(err, "run: error creating temporary directory under %q", os.TempDir())
+ }
+ // On some hosts like AH, /tmp is a symlink and we need an
+ // absolute path.
+ path, err := filepath.EvalSymlinks(p)
+ if err != nil {
+ return errors.Wrapf(err, "run: error evaluating %q for symbolic links", p)
+ }
+ logrus.Debugf("using %q to hold bundle data", path)
+ defer func() {
+ if err2 := os.RemoveAll(path); err2 != nil {
+ logrus.Errorf("error removing %q: %v", path, err2)
+ }
+ }()
+
+ gp, err := generate.New("linux")
+ if err != nil {
+ return errors.Wrapf(err, "error generating new 'linux' runtime spec")
+ }
+ g := &gp
+
+ isolation := options.Isolation
+ if isolation == IsolationDefault {
+ isolation = b.Isolation
+ if isolation == IsolationDefault {
+ isolation = IsolationOCI
+ }
+ }
+ if err := checkAndOverrideIsolationOptions(isolation, &options); err != nil {
+ return err
+ }
+
+ b.configureEnvironment(g, options)
+
+ if b.CommonBuildOpts == nil {
+ return errors.Errorf("Invalid format on container you must recreate the container")
+ }
+
+ if err := addCommonOptsToSpec(b.CommonBuildOpts, g); err != nil {
+ return err
+ }
+
+ if options.WorkingDir != "" {
+ g.SetProcessCwd(options.WorkingDir)
+ } else if b.WorkDir() != "" {
+ g.SetProcessCwd(b.WorkDir())
+ }
+ setupSelinux(g, b.ProcessLabel, b.MountLabel)
+ mountPoint, err := b.Mount(b.MountLabel)
+ if err != nil {
+ return errors.Wrapf(err, "error mounting container %q", b.ContainerID)
+ }
+ defer func() {
+ if err := b.Unmount(); err != nil {
+ logrus.Errorf("error unmounting container: %v", err)
+ }
+ }()
+ g.SetRootPath(mountPoint)
+ if len(command) > 0 {
+ command = runLookupPath(g, command)
+ g.SetProcessArgs(command)
+ } else {
+ g.SetProcessArgs(nil)
+ }
+
+ setupMaskedPaths(g)
+ setupReadOnlyPaths(g)
+
+ setupTerminal(g, options.Terminal, options.TerminalSize)
+
+ configureNetwork, configureNetworks, err := b.configureNamespaces(g, options)
+ if err != nil {
+ return err
+ }
+
+ if err := b.configureUIDGID(g, mountPoint, options); err != nil {
+ return err
+ }
+
+ g.SetProcessApparmorProfile(b.CommonBuildOpts.ApparmorProfile)
+
+ // Now grab the spec from the generator. Set the generator to nil so that future contributors
+ // will quickly be able to tell that they're supposed to be modifying the spec directly from here.
+ spec := g.Config
+ g = nil
+
+ logrus.Debugf("ensuring working directory %q exists", filepath.Join(mountPoint, spec.Process.Cwd))
+ if err = os.MkdirAll(filepath.Join(mountPoint, spec.Process.Cwd), 0755); err != nil {
+ return errors.Wrapf(err, "error ensuring working directory %q exists", spec.Process.Cwd)
+ }
+
+ // Set the seccomp configuration using the specified profile name. Some syscalls are
+ // allowed if certain capabilities are to be granted (example: CAP_SYS_CHROOT and chroot),
+ // so we sorted out the capabilities lists first.
+ if err = setupSeccomp(spec, b.CommonBuildOpts.SeccompProfilePath); err != nil {
+ return err
+ }
+
+ // Figure out who owns files that will appear to be owned by UID/GID 0 in the container.
+ rootUID, rootGID, err := util.GetHostRootIDs(spec)
+ if err != nil {
+ return err
+ }
+ rootIDPair := &idtools.IDPair{UID: int(rootUID), GID: int(rootGID)}
+
+ bindFiles := make(map[string]string)
+ namespaceOptions := append(b.NamespaceOptions, options.NamespaceOptions...)
+ volumes := b.Volumes()
+
+ if !contains(volumes, "/etc/hosts") {
+ hostFile, err := b.generateHosts(path, spec.Hostname, b.CommonBuildOpts.AddHost, rootIDPair)
+ if err != nil {
+ return err
+ }
+ bindFiles["/etc/hosts"] = hostFile
+ }
+
+ if !contains(volumes, "/etc/resolv.conf") {
+ resolvFile, err := b.addNetworkConfig(path, "/etc/resolv.conf", rootIDPair, b.CommonBuildOpts.DNSServers, b.CommonBuildOpts.DNSSearch, b.CommonBuildOpts.DNSOptions)
+ if err != nil {
+ return err
+ }
+ bindFiles["/etc/resolv.conf"] = resolvFile
+ }
+
+ err = b.setupMounts(mountPoint, spec, path, options.Mounts, bindFiles, volumes, b.CommonBuildOpts.Volumes, b.CommonBuildOpts.ShmSize, namespaceOptions)
+ if err != nil {
+ return errors.Wrapf(err, "error resolving mountpoints for container %q", b.ContainerID)
+ }
+
+ if options.CNIConfigDir == "" {
+ options.CNIConfigDir = b.CNIConfigDir
+ if b.CNIConfigDir == "" {
+ options.CNIConfigDir = util.DefaultCNIConfigDir
+ }
+ }
+ if options.CNIPluginPath == "" {
+ options.CNIPluginPath = b.CNIPluginPath
+ if b.CNIPluginPath == "" {
+ options.CNIPluginPath = util.DefaultCNIPluginPath
+ }
+ }
+
+ switch isolation {
+ case IsolationOCI:
+ var moreCreateArgs []string
+ if options.NoPivot {
+ moreCreateArgs = []string{"--no-pivot"}
+ } else {
+ moreCreateArgs = nil
+ }
+ err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, moreCreateArgs, spec, mountPoint, path, Package+"-"+filepath.Base(path))
+ case IsolationChroot:
+ err = chroot.RunUsingChroot(spec, path, options.Stdin, options.Stdout, options.Stderr)
+ case IsolationOCIRootless:
+ moreCreateArgs := []string{"--no-new-keyring"}
+ if options.NoPivot {
+ moreCreateArgs = append(moreCreateArgs, "--no-pivot")
+ }
+ if err := setupRootlessSpecChanges(spec, path, rootUID, rootGID); err != nil {
+ return err
+ }
+ err = b.runUsingRuntimeSubproc(isolation, options, configureNetwork, configureNetworks, moreCreateArgs, spec, mountPoint, path, Package+"-"+filepath.Base(path))
+ default:
+ err = errors.Errorf("don't know how to run this command")
+ }
+ return err
+}
+
+func addCommonOptsToSpec(commonOpts *CommonBuildOptions, g *generate.Generator) error {
+ // Resources - CPU
+ if commonOpts.CPUPeriod != 0 {
+ g.SetLinuxResourcesCPUPeriod(commonOpts.CPUPeriod)
+ }
+ if commonOpts.CPUQuota != 0 {
+ g.SetLinuxResourcesCPUQuota(commonOpts.CPUQuota)
+ }
+ if commonOpts.CPUShares != 0 {
+ g.SetLinuxResourcesCPUShares(commonOpts.CPUShares)
+ }
+ if commonOpts.CPUSetCPUs != "" {
+ g.SetLinuxResourcesCPUCpus(commonOpts.CPUSetCPUs)
+ }
+ if commonOpts.CPUSetMems != "" {
+ g.SetLinuxResourcesCPUMems(commonOpts.CPUSetMems)
+ }
+
+ // Resources - Memory
+ if commonOpts.Memory != 0 {
+ g.SetLinuxResourcesMemoryLimit(commonOpts.Memory)
+ }
+ if commonOpts.MemorySwap != 0 {
+ g.SetLinuxResourcesMemorySwap(commonOpts.MemorySwap)
+ }
+
+ // cgroup membership
+ if commonOpts.CgroupParent != "" {
+ g.SetLinuxCgroupsPath(commonOpts.CgroupParent)
+ }
+
+ // Other process resource limits
+ if err := addRlimits(commonOpts.Ulimit, g); err != nil {
+ return err
+ }
+
+ logrus.Debugf("Resources: %#v", commonOpts)
+ return nil
+}
+
+func runSetupBuiltinVolumes(mountLabel, mountPoint, containerDir string, copyWithTar func(srcPath, dstPath string) error, builtinVolumes []string, rootUID, rootGID int) ([]specs.Mount, error) {
+ var mounts []specs.Mount
+ hostOwner := idtools.IDPair{UID: rootUID, GID: rootGID}
+ // Add temporary copies of the contents of volume locations at the
+ // volume locations, unless we already have something there.
+ for _, volume := range builtinVolumes {
+ subdir := digest.Canonical.FromString(volume).Hex()
+ volumePath := filepath.Join(containerDir, "buildah-volumes", subdir)
+ srcPath := filepath.Join(mountPoint, volume)
+ initializeVolume := false
+ // If we need to, initialize the volume path's initial contents.
+ if _, err := os.Stat(volumePath); err != nil {
+ if !os.IsNotExist(err) {
+ return nil, errors.Wrapf(err, "failed to stat %q for volume %q", volumePath, volume)
+ }
+ logrus.Debugf("setting up built-in volume at %q", volumePath)
+ if err = os.MkdirAll(volumePath, 0755); err != nil {
+ return nil, errors.Wrapf(err, "error creating directory %q for volume %q", volumePath, volume)
+ }
+ if err = label.Relabel(volumePath, mountLabel, false); err != nil {
+ return nil, errors.Wrapf(err, "error relabeling directory %q for volume %q", volumePath, volume)
+ }
+ initializeVolume = true
+ }
+ stat, err := os.Stat(srcPath)
+ if err != nil {
+ if !os.IsNotExist(err) {
+ return nil, errors.Wrapf(err, "failed to stat %q for volume %q", srcPath, volume)
+ }
+ if err = idtools.MkdirAllAndChownNew(srcPath, 0755, hostOwner); err != nil {
+ return nil, errors.Wrapf(err, "error creating directory %q for volume %q", srcPath, volume)
+ }
+ if stat, err = os.Stat(srcPath); err != nil {
+ return nil, errors.Wrapf(err, "failed to stat %q for volume %q", srcPath, volume)
+ }
+ }
+ if initializeVolume {
+ if err = os.Chmod(volumePath, stat.Mode().Perm()); err != nil {
+ return nil, errors.Wrapf(err, "failed to chmod %q for volume %q", volumePath, volume)
+ }
+ if err = os.Chown(volumePath, int(stat.Sys().(*syscall.Stat_t).Uid), int(stat.Sys().(*syscall.Stat_t).Gid)); err != nil {
+ return nil, errors.Wrapf(err, "error chowning directory %q for volume %q", volumePath, volume)
+ }
+ if err = copyWithTar(srcPath, volumePath); err != nil && !os.IsNotExist(errors.Cause(err)) {
+ return nil, errors.Wrapf(err, "error populating directory %q for volume %q using contents of %q", volumePath, volume, srcPath)
+ }
+ }
+ // Add the bind mount.
+ mounts = append(mounts, specs.Mount{
+ Source: volumePath,
+ Destination: volume,
+ Type: "bind",
+ Options: []string{"bind"},
+ })
+ }
+ return mounts, nil
+}
+
+func (b *Builder) setupMounts(mountPoint string, spec *specs.Spec, bundlePath string, optionMounts []specs.Mount, bindFiles map[string]string, builtinVolumes, volumeMounts []string, shmSize string, namespaceOptions NamespaceOptions) error {
+ // Start building a new list of mounts.
+ var mounts []specs.Mount
+ haveMount := func(destination string) bool {
+ for _, mount := range mounts {
+ if mount.Destination == destination {
+ // Already have something to mount there.
+ return true
+ }
+ }
+ return false
+ }
+
+ ipc := namespaceOptions.Find(string(specs.IPCNamespace))
+ hostIPC := ipc == nil || ipc.Host
+ net := namespaceOptions.Find(string(specs.NetworkNamespace))
+ hostNetwork := net == nil || net.Host
+ user := namespaceOptions.Find(string(specs.UserNamespace))
+ hostUser := user == nil || user.Host
+
+ // Copy mounts from the generated list.
+ mountCgroups := true
+ specMounts := []specs.Mount{}
+ for _, specMount := range spec.Mounts {
+ // Override some of the mounts from the generated list if we're doing different things with namespaces.
+ if specMount.Destination == "/dev/shm" {
+ specMount.Options = []string{"nosuid", "noexec", "nodev", "mode=1777", "size=" + shmSize}
+ if hostIPC && !hostUser {
+ if _, err := os.Stat("/dev/shm"); err != nil && os.IsNotExist(err) {
+ logrus.Debugf("/dev/shm is not present, not binding into container")
+ continue
+ }
+ specMount = specs.Mount{
+ Source: "/dev/shm",
+ Type: "bind",
+ Destination: "/dev/shm",
+ Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev"},
+ }
+ }
+ }
+ if specMount.Destination == "/dev/mqueue" {
+ if hostIPC && !hostUser {
+ if _, err := os.Stat("/dev/mqueue"); err != nil && os.IsNotExist(err) {
+ logrus.Debugf("/dev/mqueue is not present, not binding into container")
+ continue
+ }
+ specMount = specs.Mount{
+ Source: "/dev/mqueue",
+ Type: "bind",
+ Destination: "/dev/mqueue",
+ Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev"},
+ }
+ }
+ }
+ if specMount.Destination == "/sys" {
+ if hostNetwork && !hostUser {
+ mountCgroups = false
+ if _, err := os.Stat("/sys"); err != nil && os.IsNotExist(err) {
+ logrus.Debugf("/sys is not present, not binding into container")
+ continue
+ }
+ specMount = specs.Mount{
+ Source: "/sys",
+ Type: "bind",
+ Destination: "/sys",
+ Options: []string{bind.NoBindOption, "rbind", "nosuid", "noexec", "nodev", "ro"},
+ }
+ }
+ }
+ specMounts = append(specMounts, specMount)
+ }
+
+ // Add a mount for the cgroups filesystem, unless we're already
+ // recursively bind mounting all of /sys, in which case we shouldn't
+ // bother with it.
+ sysfsMount := []specs.Mount{}
+ if mountCgroups {
+ sysfsMount = []specs.Mount{{
+ Destination: "/sys/fs/cgroup",
+ Type: "cgroup",
+ Source: "cgroup",
+ Options: []string{bind.NoBindOption, "nosuid", "noexec", "nodev", "relatime", "ro"},
+ }}
+ }
+
+ // Get the list of files we need to bind into the container.
+ bindFileMounts, err := runSetupBoundFiles(bundlePath, bindFiles)
+ if err != nil {
+ return err
+ }
+
+ // After this point we need to know the per-container persistent storage directory.
+ cdir, err := b.store.ContainerDirectory(b.ContainerID)
+ if err != nil {
+ return errors.Wrapf(err, "error determining work directory for container %q", b.ContainerID)
+ }
+
+ // Figure out which UID and GID to tell the secrets package to use
+ // for files that it creates.
+ rootUID, rootGID, err := util.GetHostRootIDs(spec)
+ if err != nil {
+ return err
+ }
+
+ // Get the list of secrets mounts.
+ secretMounts := secrets.SecretMountsWithUIDGID(b.MountLabel, cdir, b.DefaultMountsFilePath, cdir, int(rootUID), int(rootGID), unshare.IsRootless())
+
+ // Add temporary copies of the contents of volume locations at the
+ // volume locations, unless we already have something there.
+ copyWithTar := b.copyWithTar(nil, nil)
+ builtins, err := runSetupBuiltinVolumes(b.MountLabel, mountPoint, cdir, copyWithTar, builtinVolumes, int(rootUID), int(rootGID))
+ if err != nil {
+ return err
+ }
+
+ // Get the list of explicitly-specified volume mounts.
+ volumes, err := runSetupVolumeMounts(spec.Linux.MountLabel, volumeMounts, optionMounts)
+ if err != nil {
+ return err
+ }
+
+ // Add them all, in the preferred order, except where they conflict with something that was previously added.
+ for _, mount := range append(append(append(append(append(volumes, builtins...), secretMounts...), bindFileMounts...), specMounts...), sysfsMount...) {
+ if haveMount(mount.Destination) {
+ // Already mounting something there, no need to bother with this one.
+ continue
+ }
+ // Add the mount.
+ mounts = append(mounts, mount)
+ }
+
+ // Set the list in the spec.
+ spec.Mounts = mounts
+ return nil
+}
+
+// addNetworkConfig copies files from host and sets them up to bind mount into container
+func (b *Builder) addNetworkConfig(rdir, hostPath string, chownOpts *idtools.IDPair, dnsServers, dnsSearch, dnsOptions []string) (string, error) {
+ stat, err := os.Stat(hostPath)
+ if err != nil {
+ return "", errors.Wrapf(err, "error statting %q for container %q", hostPath, b.ContainerID)
+ }
+ contents, err := ioutil.ReadFile(hostPath)
+ if err != nil {
+ return "", errors.Wrapf(err, "unable to read %s", hostPath)
+ }
+
+ search := resolvconf.GetSearchDomains(contents)
+ nameservers := resolvconf.GetNameservers(contents, types.IP)
+ options := resolvconf.GetOptions(contents)
+
+ if len(dnsSearch) > 0 {
+ search = dnsSearch
+ }
+ if len(dnsServers) != 0 {
+ dns, err := getDNSIP(dnsServers)
+ if err != nil {
+ return "", errors.Wrapf(err, "error getting dns servers")
+ }
+ nameservers = []string{}
+ for _, server := range dns {
+ nameservers = append(nameservers, server.String())
+ }
+ }
+
+ if len(dnsOptions) != 0 {
+ options = dnsOptions
+ }
+
+ cfile := filepath.Join(rdir, filepath.Base(hostPath))
+ if _, err = resolvconf.Build(cfile, nameservers, search, options); err != nil {
+ return "", errors.Wrapf(err, "error building resolv.conf for container %s", b.ContainerID)
+ }
+
+ uid := int(stat.Sys().(*syscall.Stat_t).Uid)
+ gid := int(stat.Sys().(*syscall.Stat_t).Gid)
+ if chownOpts != nil {
+ uid = chownOpts.UID
+ gid = chownOpts.GID
+ }
+ if err = os.Chown(cfile, uid, gid); err != nil {
+ return "", errors.Wrapf(err, "error chowning file %q for container %q", cfile, b.ContainerID)
+ }
+
+ if err := label.Relabel(cfile, b.MountLabel, false); err != nil {
+ return "", errors.Wrapf(err, "error relabeling %q in container %q", cfile, b.ContainerID)
+ }
+
+ return cfile, nil
+}
+
+// generateHosts creates a containers hosts file
+func (b *Builder) generateHosts(rdir, hostname string, addHosts []string, chownOpts *idtools.IDPair) (string, error) {
+ hostPath := "/etc/hosts"
+ stat, err := os.Stat(hostPath)
+ if err != nil {
+ return "", errors.Wrapf(err, "error statting %q for container %q", hostPath, b.ContainerID)
+ }
+
+ hosts := bytes.NewBufferString("# Generated by Buildah\n")
+ orig, err := ioutil.ReadFile(hostPath)
+ if err != nil {
+ return "", errors.Wrapf(err, "unable to read %s", hostPath)
+ }
+ hosts.Write(orig)
+ for _, host := range addHosts {
+ // verify the host format
+ values := strings.SplitN(host, ":", 2)
+ if len(values) != 2 {
+ return "", errors.Errorf("unable to parse host entry %q: incorrect format", host)
+ }
+ if values[0] == "" {
+ return "", errors.Errorf("hostname in host entry %q is empty", host)
+ }
+ if values[1] == "" {
+ return "", errors.Errorf("IP address in host entry %q is empty", host)
+ }
+ hosts.Write([]byte(fmt.Sprintf("%s\t%s\n", values[1], values[0])))
+ }
+
+ if hostname != "" {
+ hosts.Write([]byte(fmt.Sprintf("127.0.0.1 %s\n", hostname)))
+ hosts.Write([]byte(fmt.Sprintf("::1 %s\n", hostname)))
+ }
+ cfile := filepath.Join(rdir, filepath.Base(hostPath))
+ if err = ioutils.AtomicWriteFile(cfile, hosts.Bytes(), stat.Mode().Perm()); err != nil {
+ return "", errors.Wrapf(err, "error writing /etc/hosts into the container")
+ }
+ uid := int(stat.Sys().(*syscall.Stat_t).Uid)
+ gid := int(stat.Sys().(*syscall.Stat_t).Gid)
+ if chownOpts != nil {
+ uid = chownOpts.UID
+ gid = chownOpts.GID
+ }
+ if err = os.Chown(cfile, uid, gid); err != nil {
+ return "", errors.Wrapf(err, "error chowning file %q for container %q", cfile, b.ContainerID)
+ }
+ if err := label.Relabel(cfile, b.MountLabel, false); err != nil {
+ return "", errors.Wrapf(err, "error relabeling %q in container %q", cfile, b.ContainerID)
+ }
+
+ return cfile, nil
+}
+
+func setupTerminal(g *generate.Generator, terminalPolicy TerminalPolicy, terminalSize *specs.Box) {
+ switch terminalPolicy {
+ case DefaultTerminal:
+ onTerminal := terminal.IsTerminal(unix.Stdin) && terminal.IsTerminal(unix.Stdout) && terminal.IsTerminal(unix.Stderr)
+ if onTerminal {
+ logrus.Debugf("stdio is a terminal, defaulting to using a terminal")
+ } else {
+ logrus.Debugf("stdio is not a terminal, defaulting to not using a terminal")
+ }
+ g.SetProcessTerminal(onTerminal)
+ case WithTerminal:
+ g.SetProcessTerminal(true)
+ case WithoutTerminal:
+ g.SetProcessTerminal(false)
+ }
+ if terminalSize != nil {
+ g.SetProcessConsoleSize(terminalSize.Width, terminalSize.Height)
+ }
+}
+
+func runUsingRuntime(isolation Isolation, options RunOptions, configureNetwork bool, configureNetworks, moreCreateArgs []string, spec *specs.Spec, rootPath, bundlePath, containerName string) (wstatus unix.WaitStatus, err error) {
+ // Lock the caller to a single OS-level thread.
+ runtime.LockOSThread()
+
+ // Set up bind mounts for things that a namespaced user might not be able to get to directly.
+ unmountAll, err := bind.SetupIntermediateMountNamespace(spec, bundlePath)
+ if unmountAll != nil {
+ defer func() {
+ if err := unmountAll(); err != nil {
+ logrus.Error(err)
+ }
+ }()
+ }
+ if err != nil {
+ return 1, err
+ }
+
+ // Write the runtime configuration.
+ specbytes, err := json.Marshal(spec)
+ if err != nil {
+ return 1, errors.Wrapf(err, "error encoding configuration %#v as json", spec)
+ }
+ if err = ioutils.AtomicWriteFile(filepath.Join(bundlePath, "config.json"), specbytes, 0600); err != nil {
+ return 1, errors.Wrapf(err, "error storing runtime configuration in %q", filepath.Join(bundlePath, "config.json"))
+ }
+
+ logrus.Debugf("config = %v", string(specbytes))
+
+ // Decide which runtime to use.
+ runtime := options.Runtime
+ if runtime == "" {
+ runtime = util.Runtime()
+ }
+
+ // Default to just passing down our stdio.
+ getCreateStdio := func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
+ return os.Stdin, os.Stdout, os.Stderr
+ }
+
+ // Figure out how we're doing stdio handling, and create pipes and sockets.
+ var stdio sync.WaitGroup
+ var consoleListener *net.UnixListener
+ var errorFds, closeBeforeReadingErrorFds []int
+ stdioPipe := make([][]int, 3)
+ copyConsole := false
+ copyPipes := false
+ finishCopy := make([]int, 2)
+ if err = unix.Pipe(finishCopy); err != nil {
+ return 1, errors.Wrapf(err, "error creating pipe for notifying to stop stdio")
+ }
+ finishedCopy := make(chan struct{})
+ if spec.Process != nil {
+ if spec.Process.Terminal {
+ copyConsole = true
+ // Create a listening socket for accepting the container's terminal's PTY master.
+ socketPath := filepath.Join(bundlePath, "console.sock")
+ consoleListener, err = net.ListenUnix("unix", &net.UnixAddr{Name: socketPath, Net: "unix"})
+ if err != nil {
+ return 1, errors.Wrapf(err, "error creating socket %q to receive terminal descriptor", consoleListener.Addr())
+ }
+ // Add console socket arguments.
+ moreCreateArgs = append(moreCreateArgs, "--console-socket", socketPath)
+ } else {
+ copyPipes = true
+ // Figure out who should own the pipes.
+ uid, gid, err := util.GetHostRootIDs(spec)
+ if err != nil {
+ return 1, err
+ }
+ // Create stdio pipes.
+ if stdioPipe, err = runMakeStdioPipe(int(uid), int(gid)); err != nil {
+ return 1, err
+ }
+ errorFds = []int{stdioPipe[unix.Stdout][0], stdioPipe[unix.Stderr][0]}
+ closeBeforeReadingErrorFds = []int{stdioPipe[unix.Stdout][1], stdioPipe[unix.Stderr][1]}
+ // Set stdio to our pipes.
+ getCreateStdio = func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
+ stdin := os.NewFile(uintptr(stdioPipe[unix.Stdin][0]), "/dev/stdin")
+ stdout := os.NewFile(uintptr(stdioPipe[unix.Stdout][1]), "/dev/stdout")
+ stderr := os.NewFile(uintptr(stdioPipe[unix.Stderr][1]), "/dev/stderr")
+ return stdin, stdout, stderr
+ }
+ }
+ } else {
+ if options.Quiet {
+ // Discard stdout.
+ getCreateStdio = func() (io.ReadCloser, io.WriteCloser, io.WriteCloser) {
+ return os.Stdin, nil, os.Stderr
+ }
+ }
+ }
+
+ // Build the commands that we'll execute.
+ pidFile := filepath.Join(bundlePath, "pid")
+ args := append(append(append(options.Args, "create", "--bundle", bundlePath, "--pid-file", pidFile), moreCreateArgs...), containerName)
+ create := exec.Command(runtime, args...)
+ create.Dir = bundlePath
+ stdin, stdout, stderr := getCreateStdio()
+ create.Stdin, create.Stdout, create.Stderr = stdin, stdout, stderr
+ if create.SysProcAttr == nil {
+ create.SysProcAttr = &syscall.SysProcAttr{}
+ }
+
+ args = append(options.Args, "start", containerName)
+ start := exec.Command(runtime, args...)
+ start.Dir = bundlePath
+ start.Stderr = os.Stderr
+
+ args = append(options.Args, "kill", containerName)
+ kill := exec.Command(runtime, args...)
+ kill.Dir = bundlePath
+ kill.Stderr = os.Stderr
+
+ args = append(options.Args, "delete", containerName)
+ del := exec.Command(runtime, args...)
+ del.Dir = bundlePath
+ del.Stderr = os.Stderr
+
+ // Actually create the container.
+ logrus.Debugf("Running %q", create.Args)
+ err = create.Run()
+ if err != nil {
+ return 1, errors.Wrapf(err, "error creating container for %v: %s", spec.Process.Args, runCollectOutput(errorFds, closeBeforeReadingErrorFds))
+ }
+ defer func() {
+ err2 := del.Run()
+ if err2 != nil {
+ if err == nil {
+ err = errors.Wrapf(err2, "error deleting container")
+ } else {
+ logrus.Infof("error deleting container: %v", err2)
+ }
+ }
+ }()
+
+ // Make sure we read the container's exit status when it exits.
+ pidValue, err := ioutil.ReadFile(pidFile)
+ if err != nil {
+ return 1, errors.Wrapf(err, "error reading pid from %q", pidFile)
+ }
+ pid, err := strconv.Atoi(strings.TrimSpace(string(pidValue)))
+ if err != nil {
+ return 1, errors.Wrapf(err, "error parsing pid %s as a number", string(pidValue))
+ }
+ var reaping sync.WaitGroup
+ reaping.Add(1)
+ go func() {
+ defer reaping.Done()
+ var err error
+ _, err = unix.Wait4(pid, &wstatus, 0, nil)
+ if err != nil {
+ wstatus = 0
+ logrus.Errorf("error waiting for container child process %d: %v\n", pid, err)
+ }
+ }()
+
+ if configureNetwork {
+ teardown, err := runConfigureNetwork(isolation, options, configureNetworks, pid, containerName, spec.Process.Args)
+ if teardown != nil {
+ defer teardown()
+ }
+ if err != nil {
+ return 1, err
+ }
+ }
+
+ if copyPipes {
+ // We don't need the ends of the pipes that belong to the container.
+ stdin.Close()
+ if stdout != nil {
+ stdout.Close()
+ }
+ stderr.Close()
+ }
+
+ // Handle stdio for the container in the background.
+ stdio.Add(1)
+ go runCopyStdio(&stdio, copyPipes, stdioPipe, copyConsole, consoleListener, finishCopy, finishedCopy, spec)
+
+ // Start the container.
+ logrus.Debugf("Running %q", start.Args)
+ err = start.Run()
+ if err != nil {
+ return 1, errors.Wrapf(err, "error starting container")
+ }
+ stopped := false
+ defer func() {
+ if !stopped {
+ err2 := kill.Run()
+ if err2 != nil {
+ if err == nil {
+ err = errors.Wrapf(err2, "error stopping container")
+ } else {
+ logrus.Infof("error stopping container: %v", err2)
+ }
+ }
+ }
+ }()
+
+ // Wait for the container to exit.
+ for {
+ now := time.Now()
+ var state specs.State
+ args = append(options.Args, "state", containerName)
+ stat := exec.Command(runtime, args...)
+ stat.Dir = bundlePath
+ stat.Stderr = os.Stderr
+ stateOutput, stateErr := stat.Output()
+ if stateErr != nil {
+ return 1, errors.Wrapf(stateErr, "error reading container state")
+ }
+ if err = json.Unmarshal(stateOutput, &state); err != nil {
+ return 1, errors.Wrapf(stateErr, "error parsing container state %q", string(stateOutput))
+ }
+ switch state.Status {
+ case "running":
+ case "stopped":
+ stopped = true
+ default:
+ return 1, errors.Errorf("container status unexpectedly changed to %q", state.Status)
+ }
+ if stopped {
+ break
+ }
+ select {
+ case <-finishedCopy:
+ stopped = true
+ case <-time.After(time.Until(now.Add(100 * time.Millisecond))):
+ continue
+ }
+ if stopped {
+ break
+ }
+ }
+
+ // Close the writing end of the stop-handling-stdio notification pipe.
+ unix.Close(finishCopy[1])
+ // Wait for the stdio copy goroutine to flush.
+ stdio.Wait()
+ // Wait until we finish reading the exit status.
+ reaping.Wait()
+
+ return wstatus, nil
+}
+
+func runCollectOutput(fds, closeBeforeReadingFds []int) string {
+ for _, fd := range closeBeforeReadingFds {
+ unix.Close(fd)
+ }
+ var b bytes.Buffer
+ buf := make([]byte, 8192)
+ for _, fd := range fds {
+ nread, err := unix.Read(fd, buf)
+ if err != nil {
+ if errno, isErrno := err.(syscall.Errno); isErrno {
+ switch errno {
+ default:
+ logrus.Errorf("error reading from pipe %d: %v", fd, err)
+ case syscall.EINTR, syscall.EAGAIN:
+ }
+ } else {
+ logrus.Errorf("unable to wait for data from pipe %d: %v", fd, err)
+ }
+ continue
+ }
+ for nread > 0 {
+ r := buf[:nread]
+ if nwritten, err := b.Write(r); err != nil || nwritten != len(r) {
+ if nwritten != len(r) {
+ logrus.Errorf("error buffering data from pipe %d: %v", fd, err)
+ break
+ }
+ }
+ nread, err = unix.Read(fd, buf)
+ if err != nil {
+ if errno, isErrno := err.(syscall.Errno); isErrno {
+ switch errno {
+ default:
+ logrus.Errorf("error reading from pipe %d: %v", fd, err)
+ case syscall.EINTR, syscall.EAGAIN:
+ }
+ } else {
+ logrus.Errorf("unable to wait for data from pipe %d: %v", fd, err)
+ }
+ break
+ }
+ }
+ }
+ return b.String()
+}
+
+func setupRootlessNetwork(pid int) (teardown func(), err error) {
+ slirp4netns, err := exec.LookPath("slirp4netns")
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot find slirp4netns")
+ }
+
+ rootlessSlirpSyncR, rootlessSlirpSyncW, err := os.Pipe()
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot create slirp4netns sync pipe")
+ }
+ defer rootlessSlirpSyncR.Close()
+
+ // Be sure there are no fds inherited to slirp4netns except the sync pipe
+ files, err := ioutil.ReadDir("/proc/self/fd")
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot list open fds")
+ }
+ for _, f := range files {
+ fd, err := strconv.Atoi(f.Name())
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot parse fd")
+ }
+ if fd == int(rootlessSlirpSyncW.Fd()) {
+ continue
+ }
+ unix.CloseOnExec(fd)
+ }
+
+ cmd := exec.Command(slirp4netns, "--mtu", "65520", "-r", "3", "-c", fmt.Sprintf("%d", pid), "tap0")
+ cmd.Stdin, cmd.Stdout, cmd.Stderr = nil, nil, nil
+ cmd.ExtraFiles = []*os.File{rootlessSlirpSyncW}
+
+ err = cmd.Start()
+ rootlessSlirpSyncW.Close()
+ if err != nil {
+ return nil, errors.Wrapf(err, "cannot start slirp4netns")
+ }
+
+ b := make([]byte, 1)
+ for {
+ if err := rootlessSlirpSyncR.SetDeadline(time.Now().Add(1 * time.Second)); err != nil {
+ return nil, errors.Wrapf(err, "error setting slirp4netns pipe timeout")
+ }
+ if _, err := rootlessSlirpSyncR.Read(b); err == nil {
+ break
+ } else {
+ if os.IsTimeout(err) {
+ // Check if the process is still running.
+ var status syscall.WaitStatus
+ _, err := syscall.Wait4(cmd.Process.Pid, &status, syscall.WNOHANG, nil)
+ if err != nil {
+ return nil, errors.Wrapf(err, "failed to read slirp4netns process status")
+ }
+ if status.Exited() || status.Signaled() {
+ return nil, errors.New("slirp4netns failed")
+ }
+
+ continue
+ }
+ return nil, errors.Wrapf(err, "failed to read from slirp4netns sync pipe")
+ }
+ }
+
+ return func() {
+ cmd.Process.Kill()
+ cmd.Wait()
+ }, nil
+}
+
+func runConfigureNetwork(isolation Isolation, options RunOptions, configureNetworks []string, pid int, containerName string, command []string) (teardown func(), err error) {
+ var netconf, undo []*libcni.NetworkConfigList
+
+ if isolation == IsolationOCIRootless {
+ if ns := options.NamespaceOptions.Find(string(specs.NetworkNamespace)); ns != nil && !ns.Host && ns.Path == "" {
+ return setupRootlessNetwork(pid)
+ }
+ }
+ // Scan for CNI configuration files.
+ confdir := options.CNIConfigDir
+ files, err := libcni.ConfFiles(confdir, []string{".conf"})
+ if err != nil {
+ return nil, errors.Wrapf(err, "error finding CNI networking configuration files named *.conf in directory %q", confdir)
+ }
+ lists, err := libcni.ConfFiles(confdir, []string{".conflist"})
+ if err != nil {
+ return nil, errors.Wrapf(err, "error finding CNI networking configuration list files named *.conflist in directory %q", confdir)
+ }
+ logrus.Debugf("CNI network configuration file list: %#v", append(files, lists...))
+ // Read the CNI configuration files.
+ for _, file := range files {
+ nc, err := libcni.ConfFromFile(file)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error loading networking configuration from file %q for %v", file, command)
+ }
+ if len(configureNetworks) > 0 && nc.Network != nil && (nc.Network.Name == "" || !util.StringInSlice(nc.Network.Name, configureNetworks)) {
+ if nc.Network.Name == "" {
+ logrus.Debugf("configuration in %q has no name, skipping it", file)
+ } else {
+ logrus.Debugf("configuration in %q has name %q, skipping it", file, nc.Network.Name)
+ }
+ continue
+ }
+ cl, err := libcni.ConfListFromConf(nc)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error converting networking configuration from file %q for %v", file, command)
+ }
+ logrus.Debugf("using network configuration from %q", file)
+ netconf = append(netconf, cl)
+ }
+ for _, list := range lists {
+ cl, err := libcni.ConfListFromFile(list)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error loading networking configuration list from file %q for %v", list, command)
+ }
+ if len(configureNetworks) > 0 && (cl.Name == "" || !util.StringInSlice(cl.Name, configureNetworks)) {
+ if cl.Name == "" {
+ logrus.Debugf("configuration list in %q has no name, skipping it", list)
+ } else {
+ logrus.Debugf("configuration list in %q has name %q, skipping it", list, cl.Name)
+ }
+ continue
+ }
+ logrus.Debugf("using network configuration list from %q", list)
+ netconf = append(netconf, cl)
+ }
+ // Make sure we can access the container's network namespace,
+ // even after it exits, to successfully tear down the
+ // interfaces. Ensure this by opening a handle to the network
+ // namespace, and using our copy to both configure and
+ // deconfigure it.
+ netns := fmt.Sprintf("/proc/%d/ns/net", pid)
+ netFD, err := unix.Open(netns, unix.O_RDONLY, 0)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error opening network namespace for %v", command)
+ }
+ mynetns := fmt.Sprintf("/proc/%d/fd/%d", unix.Getpid(), netFD)
+ // Build our search path for the plugins.
+ pluginPaths := strings.Split(options.CNIPluginPath, string(os.PathListSeparator))
+ cni := libcni.CNIConfig{Path: pluginPaths}
+ // Configure the interfaces.
+ rtconf := make(map[*libcni.NetworkConfigList]*libcni.RuntimeConf)
+ teardown = func() {
+ for _, nc := range undo {
+ if err = cni.DelNetworkList(context.Background(), nc, rtconf[nc]); err != nil {
+ logrus.Errorf("error cleaning up network %v for %v: %v", rtconf[nc].IfName, command, err)
+ }
+ }
+ unix.Close(netFD)
+ }
+ for i, nc := range netconf {
+ // Build the runtime config for use with this network configuration.
+ rtconf[nc] = &libcni.RuntimeConf{
+ ContainerID: containerName,
+ NetNS: mynetns,
+ IfName: fmt.Sprintf("if%d", i),
+ Args: [][2]string{},
+ CapabilityArgs: map[string]interface{}{},
+ }
+ // Bring it up.
+ _, err := cni.AddNetworkList(context.Background(), nc, rtconf[nc])
+ if err != nil {
+ return teardown, errors.Wrapf(err, "error configuring network list %v for %v", rtconf[nc].IfName, command)
+ }
+ // Add it to the list of networks to take down when the container process exits.
+ undo = append([]*libcni.NetworkConfigList{nc}, undo...)
+ }
+ return teardown, nil
+}
+
+func runCopyStdio(stdio *sync.WaitGroup, copyPipes bool, stdioPipe [][]int, copyConsole bool, consoleListener *net.UnixListener, finishCopy []int, finishedCopy chan struct{}, spec *specs.Spec) {
+ defer func() {
+ unix.Close(finishCopy[0])
+ if copyPipes {
+ unix.Close(stdioPipe[unix.Stdin][1])
+ unix.Close(stdioPipe[unix.Stdout][0])
+ unix.Close(stdioPipe[unix.Stderr][0])
+ }
+ stdio.Done()
+ finishedCopy <- struct{}{}
+ }()
+ // Map describing where data on an incoming descriptor should go.
+ relayMap := make(map[int]int)
+ // Map describing incoming and outgoing descriptors.
+ readDesc := make(map[int]string)
+ writeDesc := make(map[int]string)
+ // Buffers.
+ relayBuffer := make(map[int]*bytes.Buffer)
+ // Set up the terminal descriptor or pipes for polling.
+ if copyConsole {
+ // Accept a connection over our listening socket.
+ fd, err := runAcceptTerminal(consoleListener, spec.Process.ConsoleSize)
+ if err != nil {
+ logrus.Errorf("%v", err)
+ return
+ }
+ terminalFD := fd
+ // Input from our stdin, output from the terminal descriptor.
+ relayMap[unix.Stdin] = terminalFD
+ readDesc[unix.Stdin] = "stdin"
+ relayBuffer[terminalFD] = new(bytes.Buffer)
+ writeDesc[terminalFD] = "container terminal input"
+ relayMap[terminalFD] = unix.Stdout
+ readDesc[terminalFD] = "container terminal output"
+ relayBuffer[unix.Stdout] = new(bytes.Buffer)
+ writeDesc[unix.Stdout] = "output"
+ // Set our terminal's mode to raw, to pass handling of special
+ // terminal input to the terminal in the container.
+ if terminal.IsTerminal(unix.Stdin) {
+ if state, err := terminal.MakeRaw(unix.Stdin); err != nil {
+ logrus.Warnf("error setting terminal state: %v", err)
+ } else {
+ defer func() {
+ if err = terminal.Restore(unix.Stdin, state); err != nil {
+ logrus.Errorf("unable to restore terminal state: %v", err)
+ }
+ }()
+ }
+ }
+ }
+ if copyPipes {
+ // Input from our stdin, output from the stdout and stderr pipes.
+ relayMap[unix.Stdin] = stdioPipe[unix.Stdin][1]
+ readDesc[unix.Stdin] = "stdin"
+ relayBuffer[stdioPipe[unix.Stdin][1]] = new(bytes.Buffer)
+ writeDesc[stdioPipe[unix.Stdin][1]] = "container stdin"
+ relayMap[stdioPipe[unix.Stdout][0]] = unix.Stdout
+ readDesc[stdioPipe[unix.Stdout][0]] = "container stdout"
+ relayBuffer[unix.Stdout] = new(bytes.Buffer)
+ writeDesc[unix.Stdout] = "stdout"
+ relayMap[stdioPipe[unix.Stderr][0]] = unix.Stderr
+ readDesc[stdioPipe[unix.Stderr][0]] = "container stderr"
+ relayBuffer[unix.Stderr] = new(bytes.Buffer)
+ writeDesc[unix.Stderr] = "stderr"
+ }
+ // Set our reading descriptors to non-blocking.
+ for rfd, wfd := range relayMap {
+ if err := unix.SetNonblock(rfd, true); err != nil {
+ logrus.Errorf("error setting %s to nonblocking: %v", readDesc[rfd], err)
+ return
+ }
+ if err := unix.SetNonblock(wfd, false); err != nil {
+ logrus.Errorf("error setting descriptor %d (%s) blocking: %v", wfd, writeDesc[wfd], err)
+ }
+ }
+ // Pass data back and forth.
+ pollTimeout := -1
+ for len(relayMap) > 0 {
+ // Start building the list of descriptors to poll.
+ pollFds := make([]unix.PollFd, 0, len(relayMap)+1)
+ // Poll for a notification that we should stop handling stdio.
+ pollFds = append(pollFds, unix.PollFd{Fd: int32(finishCopy[0]), Events: unix.POLLIN | unix.POLLHUP})
+ // Poll on our reading descriptors.
+ for rfd := range relayMap {
+ pollFds = append(pollFds, unix.PollFd{Fd: int32(rfd), Events: unix.POLLIN | unix.POLLHUP})
+ }
+ buf := make([]byte, 8192)
+ // Wait for new data from any input descriptor, or a notification that we're done.
+ _, err := unix.Poll(pollFds, pollTimeout)
+ if !util.LogIfNotRetryable(err, fmt.Sprintf("error waiting for stdio/terminal data to relay: %v", err)) {
+ return
+ }
+ removes := make(map[int]struct{})
+ for _, pollFd := range pollFds {
+ // If this descriptor's just been closed from the other end, mark it for
+ // removal from the set that we're checking for.
+ if pollFd.Revents&unix.POLLHUP == unix.POLLHUP {
+ removes[int(pollFd.Fd)] = struct{}{}
+ }
+ // If the descriptor was closed elsewhere, remove it from our list.
+ if pollFd.Revents&unix.POLLNVAL != 0 {
+ logrus.Debugf("error polling descriptor %s: closed?", readDesc[int(pollFd.Fd)])
+ removes[int(pollFd.Fd)] = struct{}{}
+ }
+ // If the POLLIN flag isn't set, then there's no data to be read from this descriptor.
+ if pollFd.Revents&unix.POLLIN == 0 {
+ // If we're using pipes and it's our stdin and it's closed, close the writing
+ // end of the corresponding pipe.
+ if copyPipes && int(pollFd.Fd) == unix.Stdin && pollFd.Revents&unix.POLLHUP != 0 {
+ unix.Close(stdioPipe[unix.Stdin][1])
+ stdioPipe[unix.Stdin][1] = -1
+ }
+ continue
+ }
+ // Read whatever there is to be read.
+ readFD := int(pollFd.Fd)
+ writeFD, needToRelay := relayMap[readFD]
+ if needToRelay {
+ n, err := unix.Read(readFD, buf)
+ if !util.LogIfNotRetryable(err, fmt.Sprintf("unable to read %s data: %v", readDesc[readFD], err)) {
+ return
+ }
+ // If it's zero-length on our stdin and we're
+ // using pipes, it's an EOF, so close the stdin
+ // pipe's writing end.
+ if n == 0 && copyPipes && int(pollFd.Fd) == unix.Stdin {
+ unix.Close(stdioPipe[unix.Stdin][1])
+ stdioPipe[unix.Stdin][1] = -1
+ }
+ if n > 0 {
+ // Buffer the data in case we get blocked on where they need to go.
+ nwritten, err := relayBuffer[writeFD].Write(buf[:n])
+ if err != nil {
+ logrus.Debugf("buffer: %v", err)
+ continue
+ }
+ if nwritten != n {
+ logrus.Debugf("buffer: expected to buffer %d bytes, wrote %d", n, nwritten)
+ continue
+ }
+ // If this is the last of the data we'll be able to read from this
+ // descriptor, read all that there is to read.
+ for pollFd.Revents&unix.POLLHUP == unix.POLLHUP {
+ nr, err := unix.Read(readFD, buf)
+ util.LogIfUnexpectedWhileDraining(err, fmt.Sprintf("read %s: %v", readDesc[readFD], err))
+ if nr <= 0 {
+ break
+ }
+ nwritten, err := relayBuffer[writeFD].Write(buf[:nr])
+ if err != nil {
+ logrus.Debugf("buffer: %v", err)
+ break
+ }
+ if nwritten != nr {
+ logrus.Debugf("buffer: expected to buffer %d bytes, wrote %d", nr, nwritten)
+ break
+ }
+ }
+ }
+ }
+ }
+ // Try to drain the output buffers. Set the default timeout
+ // for the next poll() to 100ms if we still have data to write.
+ pollTimeout = -1
+ for writeFD := range relayBuffer {
+ if relayBuffer[writeFD].Len() > 0 {
+ n, err := unix.Write(writeFD, relayBuffer[writeFD].Bytes())
+ if !util.LogIfNotRetryable(err, fmt.Sprintf("unable to write %s data: %v", writeDesc[writeFD], err)) {
+ return
+ }
+ if n > 0 {
+ relayBuffer[writeFD].Next(n)
+ }
+ }
+ if relayBuffer[writeFD].Len() > 0 {
+ pollTimeout = 100
+ }
+ }
+ // Remove any descriptors which we don't need to poll any more from the poll descriptor list.
+ for remove := range removes {
+ delete(relayMap, remove)
+ }
+ // If the we-can-return pipe had anything for us, we're done.
+ for _, pollFd := range pollFds {
+ if int(pollFd.Fd) == finishCopy[0] && pollFd.Revents != 0 {
+ // The pipe is closed, indicating that we can stop now.
+ return
+ }
+ }
+ }
+}
+
+func runAcceptTerminal(consoleListener *net.UnixListener, terminalSize *specs.Box) (int, error) {
+ defer consoleListener.Close()
+ c, err := consoleListener.AcceptUnix()
+ if err != nil {
+ return -1, errors.Wrapf(err, "error accepting socket descriptor connection")
+ }
+ defer c.Close()
+ // Expect a control message over our new connection.
+ b := make([]byte, 8192)
+ oob := make([]byte, 8192)
+ n, oobn, _, _, err := c.ReadMsgUnix(b, oob)
+ if err != nil {
+ return -1, errors.Wrapf(err, "error reading socket descriptor")
+ }
+ if n > 0 {
+ logrus.Debugf("socket descriptor is for %q", string(b[:n]))
+ }
+ if oobn > len(oob) {
+ return -1, errors.Errorf("too much out-of-bounds data (%d bytes)", oobn)
+ }
+ // Parse the control message.
+ scm, err := unix.ParseSocketControlMessage(oob[:oobn])
+ if err != nil {
+ return -1, errors.Wrapf(err, "error parsing out-of-bound data as a socket control message")
+ }
+ logrus.Debugf("control messages: %v", scm)
+ // Expect to get a descriptor.
+ terminalFD := -1
+ for i := range scm {
+ fds, err := unix.ParseUnixRights(&scm[i])
+ if err != nil {
+ return -1, errors.Wrapf(err, "error parsing unix rights control message: %v", &scm[i])
+ }
+ logrus.Debugf("fds: %v", fds)
+ if len(fds) == 0 {
+ continue
+ }
+ terminalFD = fds[0]
+ break
+ }
+ if terminalFD == -1 {
+ return -1, errors.Errorf("unable to read terminal descriptor")
+ }
+ // Set the pseudoterminal's size to the configured size, or our own.
+ winsize := &unix.Winsize{}
+ if terminalSize != nil {
+ // Use configured sizes.
+ winsize.Row = uint16(terminalSize.Height)
+ winsize.Col = uint16(terminalSize.Width)
+ } else {
+ if terminal.IsTerminal(unix.Stdin) {
+ // Use the size of our terminal.
+ if winsize, err = unix.IoctlGetWinsize(unix.Stdin, unix.TIOCGWINSZ); err != nil {
+ logrus.Warnf("error reading size of controlling terminal: %v", err)
+ winsize.Row = 0
+ winsize.Col = 0
+ }
+ }
+ }
+ if winsize.Row != 0 && winsize.Col != 0 {
+ if err = unix.IoctlSetWinsize(terminalFD, unix.TIOCSWINSZ, winsize); err != nil {
+ logrus.Warnf("error setting size of container pseudoterminal: %v", err)
+ }
+ // FIXME - if we're connected to a terminal, we should
+ // be passing the updated terminal size down when we
+ // receive a SIGWINCH.
+ }
+ return terminalFD, nil
+}
+
+// Create pipes to use for relaying stdio.
+func runMakeStdioPipe(uid, gid int) ([][]int, error) {
+ stdioPipe := make([][]int, 3)
+ for i := range stdioPipe {
+ stdioPipe[i] = make([]int, 2)
+ if err := unix.Pipe(stdioPipe[i]); err != nil {
+ return nil, errors.Wrapf(err, "error creating pipe for container FD %d", i)
+ }
+ }
+ if err := unix.Fchown(stdioPipe[unix.Stdin][0], uid, gid); err != nil {
+ return nil, errors.Wrapf(err, "error setting owner of stdin pipe descriptor")
+ }
+ if err := unix.Fchown(stdioPipe[unix.Stdout][1], uid, gid); err != nil {
+ return nil, errors.Wrapf(err, "error setting owner of stdout pipe descriptor")
+ }
+ if err := unix.Fchown(stdioPipe[unix.Stderr][1], uid, gid); err != nil {
+ return nil, errors.Wrapf(err, "error setting owner of stderr pipe descriptor")
+ }
+ return stdioPipe, nil
+}
+
+func runUsingRuntimeMain() {
+ var options runUsingRuntimeSubprocOptions
+ // Set logging.
+ if level := os.Getenv("LOGLEVEL"); level != "" {
+ if ll, err := strconv.Atoi(level); err == nil {
+ logrus.SetLevel(logrus.Level(ll))
+ }
+ }
+ // Unpack our configuration.
+ confPipe := os.NewFile(3, "confpipe")
+ if confPipe == nil {
+ fmt.Fprintf(os.Stderr, "error reading options pipe\n")
+ os.Exit(1)
+ }
+ defer confPipe.Close()
+ if err := json.NewDecoder(confPipe).Decode(&options); err != nil {
+ fmt.Fprintf(os.Stderr, "error decoding options: %v\n", err)
+ os.Exit(1)
+ }
+ // Set ourselves up to read the container's exit status. We're doing this in a child process
+ // so that we won't mess with the setting in a caller of the library. This stubs to OS specific
+ // calls
+ if err := setChildProcess(); err != nil {
+ os.Exit(1)
+ }
+ // Run the container, start to finish.
+ status, err := runUsingRuntime(options.Isolation, options.Options, options.ConfigureNetwork, options.ConfigureNetworks, options.MoreCreateArgs, options.Spec, options.RootPath, options.BundlePath, options.ContainerName)
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "error running container: %v\n", err)
+ os.Exit(1)
+ }
+ // Pass the container's exit status back to the caller by exiting with the same status.
+ if status.Exited() {
+ os.Exit(status.ExitStatus())
+ } else if status.Signaled() {
+ fmt.Fprintf(os.Stderr, "container exited on %s\n", status.Signal())
+ os.Exit(1)
+ }
+ os.Exit(1)
+}
+
+func setupNamespaces(g *generate.Generator, namespaceOptions NamespaceOptions, idmapOptions IDMappingOptions, policy NetworkConfigurationPolicy) (configureNetwork bool, configureNetworks []string, configureUTS bool, err error) {
+ // Set namespace options in the container configuration.
+ configureUserns := false
+ specifiedNetwork := false
+ for _, namespaceOption := range namespaceOptions {
+ switch namespaceOption.Name {
+ case string(specs.UserNamespace):
+ configureUserns = false
+ if !namespaceOption.Host && namespaceOption.Path == "" {
+ configureUserns = true
+ }
+ case string(specs.NetworkNamespace):
+ specifiedNetwork = true
+ configureNetwork = false
+ if !namespaceOption.Host && (namespaceOption.Path == "" || !filepath.IsAbs(namespaceOption.Path)) {
+ if namespaceOption.Path != "" && !filepath.IsAbs(namespaceOption.Path) {
+ configureNetworks = strings.Split(namespaceOption.Path, ",")
+ namespaceOption.Path = ""
+ }
+ configureNetwork = (policy != NetworkDisabled)
+ }
+ case string(specs.UTSNamespace):
+ configureUTS = false
+ if !namespaceOption.Host && namespaceOption.Path == "" {
+ configureUTS = true
+ }
+ }
+ if namespaceOption.Host {
+ if err := g.RemoveLinuxNamespace(namespaceOption.Name); err != nil {
+ return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", namespaceOption.Name)
+ }
+ } else if err := g.AddOrReplaceLinuxNamespace(namespaceOption.Name, namespaceOption.Path); err != nil {
+ if namespaceOption.Path == "" {
+ return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", namespaceOption.Name)
+ }
+ return false, nil, false, errors.Wrapf(err, "error adding %q namespace %q for run", namespaceOption.Name, namespaceOption.Path)
+ }
+ }
+
+ // If we've got mappings, we're going to have to create a user namespace.
+ if len(idmapOptions.UIDMap) > 0 || len(idmapOptions.GIDMap) > 0 || configureUserns {
+ if err := g.AddOrReplaceLinuxNamespace(specs.UserNamespace, ""); err != nil {
+ return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", string(specs.UserNamespace))
+ }
+ hostUidmap, hostGidmap, err := unshare.GetHostIDMappings("")
+ if err != nil {
+ return false, nil, false, err
+ }
+ for _, m := range idmapOptions.UIDMap {
+ g.AddLinuxUIDMapping(m.HostID, m.ContainerID, m.Size)
+ }
+ if len(idmapOptions.UIDMap) == 0 {
+ for _, m := range hostUidmap {
+ g.AddLinuxUIDMapping(m.ContainerID, m.ContainerID, m.Size)
+ }
+ }
+ for _, m := range idmapOptions.GIDMap {
+ g.AddLinuxGIDMapping(m.HostID, m.ContainerID, m.Size)
+ }
+ if len(idmapOptions.GIDMap) == 0 {
+ for _, m := range hostGidmap {
+ g.AddLinuxGIDMapping(m.ContainerID, m.ContainerID, m.Size)
+ }
+ }
+ if !specifiedNetwork {
+ if err := g.AddOrReplaceLinuxNamespace(specs.NetworkNamespace, ""); err != nil {
+ return false, nil, false, errors.Wrapf(err, "error adding new %q namespace for run", string(specs.NetworkNamespace))
+ }
+ configureNetwork = (policy != NetworkDisabled)
+ }
+ } else {
+ if err := g.RemoveLinuxNamespace(specs.UserNamespace); err != nil {
+ return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", string(specs.UserNamespace))
+ }
+ if !specifiedNetwork {
+ if err := g.RemoveLinuxNamespace(specs.NetworkNamespace); err != nil {
+ return false, nil, false, errors.Wrapf(err, "error removing %q namespace for run", string(specs.NetworkNamespace))
+ }
+ }
+ }
+ if configureNetwork {
+ for name, val := range util.DefaultNetworkSysctl {
+ g.AddLinuxSysctl(name, val)
+ }
+ }
+ return configureNetwork, configureNetworks, configureUTS, nil
+}
+
+func (b *Builder) configureNamespaces(g *generate.Generator, options RunOptions) (bool, []string, error) {
+ defaultNamespaceOptions, err := DefaultNamespaceOptions()
+ if err != nil {
+ return false, nil, err
+ }
+
+ namespaceOptions := defaultNamespaceOptions
+ namespaceOptions.AddOrReplace(b.NamespaceOptions...)
+ namespaceOptions.AddOrReplace(options.NamespaceOptions...)
+
+ networkPolicy := options.ConfigureNetwork
+ if networkPolicy == NetworkDefault {
+ networkPolicy = b.ConfigureNetwork
+ }
+
+ configureNetwork, configureNetworks, configureUTS, err := setupNamespaces(g, namespaceOptions, b.IDMappingOptions, networkPolicy)
+ if err != nil {
+ return false, nil, err
+ }
+
+ if configureUTS {
+ if options.Hostname != "" {
+ g.SetHostname(options.Hostname)
+ } else if b.Hostname() != "" {
+ g.SetHostname(b.Hostname())
+ } else {
+ g.SetHostname(stringid.TruncateID(b.ContainerID))
+ }
+ } else {
+ g.SetHostname("")
+ }
+
+ found := false
+ spec := g.Config
+ for i := range spec.Process.Env {
+ if strings.HasPrefix(spec.Process.Env[i], "HOSTNAME=") {
+ found = true
+ break
+ }
+ }
+ if !found {
+ spec.Process.Env = append(spec.Process.Env, fmt.Sprintf("HOSTNAME=%s", spec.Hostname))
+ }
+
+ return configureNetwork, configureNetworks, nil
+}
+
+func runSetupBoundFiles(bundlePath string, bindFiles map[string]string) (mounts []specs.Mount, err error) {
+ for dest, src := range bindFiles {
+ options := []string{"rbind"}
+ if strings.HasPrefix(src, bundlePath) {
+ options = append(options, bind.NoBindOption)
+ }
+ mounts = append(mounts, specs.Mount{
+ Source: src,
+ Destination: dest,
+ Type: "bind",
+ Options: options,
+ })
+ }
+ return mounts, nil
+}
+
+func addRlimits(ulimit []string, g *generate.Generator) error {
+ var (
+ ul *units.Ulimit
+ err error
+ )
+
+ for _, u := range ulimit {
+ if ul, err = units.ParseUlimit(u); err != nil {
+ return errors.Wrapf(err, "ulimit option %q requires name=SOFT:HARD, failed to be parsed", u)
+ }
+
+ g.AddProcessRlimits("RLIMIT_"+strings.ToUpper(ul.Name), uint64(ul.Hard), uint64(ul.Soft))
+ }
+ return nil
+}
+
+func runSetupVolumeMounts(mountLabel string, volumeMounts []string, optionMounts []specs.Mount) ([]specs.Mount, error) {
+ var mounts []specs.Mount
+
+ parseMount := func(host, container string, options []string) (specs.Mount, error) {
+ var foundrw, foundro, foundz, foundZ bool
+ var rootProp string
+ for _, opt := range options {
+ switch opt {
+ case "rw":
+ foundrw = true
+ case "ro":
+ foundro = true
+ case "z":
+ foundz = true
+ case "Z":
+ foundZ = true
+ case "private", "rprivate", "slave", "rslave", "shared", "rshared":
+ rootProp = opt
+ }
+ }
+ if !foundrw && !foundro {
+ options = append(options, "rw")
+ }
+ if foundz {
+ if err := label.Relabel(host, mountLabel, true); err != nil {
+ return specs.Mount{}, errors.Wrapf(err, "relabeling %q failed", host)
+ }
+ }
+ if foundZ {
+ if err := label.Relabel(host, mountLabel, false); err != nil {
+ return specs.Mount{}, errors.Wrapf(err, "relabeling %q failed", host)
+ }
+ }
+ if rootProp == "" {
+ options = append(options, "private")
+ }
+ return specs.Mount{
+ Destination: container,
+ Type: "bind",
+ Source: host,
+ Options: options,
+ }, nil
+ }
+ // Bind mount volumes specified for this particular Run() invocation
+ for _, i := range optionMounts {
+ logrus.Debugf("setting up mounted volume at %q", i.Destination)
+ mount, err := parseMount(i.Source, i.Destination, append(i.Options, "rbind"))
+ if err != nil {
+ return nil, err
+ }
+ mounts = append(mounts, mount)
+ }
+ // Bind mount volumes given by the user when the container was created
+ for _, i := range volumeMounts {
+ var options []string
+ spliti := strings.Split(i, ":")
+ if len(spliti) > 2 {
+ options = strings.Split(spliti[2], ",")
+ }
+ options = append(options, "rbind")
+ mount, err := parseMount(spliti[0], spliti[1], options)
+ if err != nil {
+ return nil, err
+ }
+ mounts = append(mounts, mount)
+ }
+ return mounts, nil
+}
+
+func setupMaskedPaths(g *generate.Generator) {
+ for _, mp := range []string{
+ "/proc/acpi",
+ "/proc/kcore",
+ "/proc/keys",
+ "/proc/latency_stats",
+ "/proc/timer_list",
+ "/proc/timer_stats",
+ "/proc/sched_debug",
+ "/proc/scsi",
+ "/sys/firmware",
+ } {
+ g.AddLinuxMaskedPaths(mp)
+ }
+}
+
+func setupReadOnlyPaths(g *generate.Generator) {
+ for _, rp := range []string{
+ "/proc/asound",
+ "/proc/bus",
+ "/proc/fs",
+ "/proc/irq",
+ "/proc/sys",
+ "/proc/sysrq-trigger",
+ } {
+ g.AddLinuxReadonlyPaths(rp)
+ }
+}
+
+func setupCapAdd(g *generate.Generator, caps ...string) error {
+ for _, cap := range caps {
+ if err := g.AddProcessCapabilityBounding(cap); err != nil {
+ return errors.Wrapf(err, "error adding %q to the bounding capability set", cap)
+ }
+ if err := g.AddProcessCapabilityEffective(cap); err != nil {
+ return errors.Wrapf(err, "error adding %q to the effective capability set", cap)
+ }
+ if err := g.AddProcessCapabilityInheritable(cap); err != nil {
+ return errors.Wrapf(err, "error adding %q to the inheritable capability set", cap)
+ }
+ if err := g.AddProcessCapabilityPermitted(cap); err != nil {
+ return errors.Wrapf(err, "error adding %q to the permitted capability set", cap)
+ }
+ if err := g.AddProcessCapabilityAmbient(cap); err != nil {
+ return errors.Wrapf(err, "error adding %q to the ambient capability set", cap)
+ }
+ }
+ return nil
+}
+
+func setupCapDrop(g *generate.Generator, caps ...string) error {
+ for _, cap := range caps {
+ if err := g.DropProcessCapabilityBounding(cap); err != nil {
+ return errors.Wrapf(err, "error removing %q from the bounding capability set", cap)
+ }
+ if err := g.DropProcessCapabilityEffective(cap); err != nil {
+ return errors.Wrapf(err, "error removing %q from the effective capability set", cap)
+ }
+ if err := g.DropProcessCapabilityInheritable(cap); err != nil {
+ return errors.Wrapf(err, "error removing %q from the inheritable capability set", cap)
+ }
+ if err := g.DropProcessCapabilityPermitted(cap); err != nil {
+ return errors.Wrapf(err, "error removing %q from the permitted capability set", cap)
+ }
+ if err := g.DropProcessCapabilityAmbient(cap); err != nil {
+ return errors.Wrapf(err, "error removing %q from the ambient capability set", cap)
+ }
+ }
+ return nil
+}
+
+func setupCapabilities(g *generate.Generator, firstAdds, firstDrops, secondAdds, secondDrops []string) error {
+ g.ClearProcessCapabilities()
+ if err := setupCapAdd(g, util.DefaultCapabilities...); err != nil {
+ return err
+ }
+ if err := setupCapAdd(g, firstAdds...); err != nil {
+ return err
+ }
+ if err := setupCapDrop(g, firstDrops...); err != nil {
+ return err
+ }
+ if err := setupCapAdd(g, secondAdds...); err != nil {
+ return err
+ }
+ return setupCapDrop(g, secondDrops...)
+}
+
+// Search for a command that isn't given as an absolute path using the $PATH
+// under the rootfs. We can't resolve absolute symbolic links without
+// chroot()ing, which we may not be able to do, so just accept a link as a
+// valid resolution.
+func runLookupPath(g *generate.Generator, command []string) []string {
+ // Look for the configured $PATH.
+ spec := g.Config
+ envPath := ""
+ for i := range spec.Process.Env {
+ if strings.HasPrefix(spec.Process.Env[i], "PATH=") {
+ envPath = spec.Process.Env[i]
+ }
+ }
+ // If there is no configured $PATH, supply one.
+ if envPath == "" {
+ defaultPath := "/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
+ envPath = "PATH=" + defaultPath
+ g.AddProcessEnv("PATH", defaultPath)
+ }
+ // No command, nothing to do.
+ if len(command) == 0 {
+ return command
+ }
+ // Command is already an absolute path, use it as-is.
+ if filepath.IsAbs(command[0]) {
+ return command
+ }
+ // For each element in the PATH,
+ for _, pathEntry := range filepath.SplitList(envPath[5:]) {
+ // if it's the empty string, it's ".", which is the Cwd,
+ if pathEntry == "" {
+ pathEntry = spec.Process.Cwd
+ }
+ // build the absolute path which it might be,
+ candidate := filepath.Join(pathEntry, command[0])
+ // check if it's there,
+ if fi, err := os.Lstat(filepath.Join(spec.Root.Path, candidate)); fi != nil && err == nil {
+ // and if it's not a directory, and either a symlink or executable,
+ if !fi.IsDir() && ((fi.Mode()&os.ModeSymlink != 0) || (fi.Mode()&0111 != 0)) {
+ // use that.
+ return append([]string{candidate}, command[1:]...)
+ }
+ }
+ }
+ return command
+}
+
+func getDNSIP(dnsServers []string) (dns []net.IP, err error) {
+ for _, i := range dnsServers {
+ result := net.ParseIP(i)
+ if result == nil {
+ return dns, errors.Errorf("invalid IP address %s", i)
+ }
+ dns = append(dns, result)
+ }
+ return dns, nil
+}
+
+func (b *Builder) configureUIDGID(g *generate.Generator, mountPoint string, options RunOptions) error {
+ // Set the user UID/GID/supplemental group list/capabilities lists.
+ user, err := b.user(mountPoint, options.User)
+ if err != nil {
+ return err
+ }
+ if err := setupCapabilities(g, b.AddCapabilities, b.DropCapabilities, options.AddCapabilities, options.DropCapabilities); err != nil {
+ return err
+ }
+ g.SetProcessUID(user.UID)
+ g.SetProcessGID(user.GID)
+ for _, gid := range user.AdditionalGids {
+ g.AddProcessAdditionalGid(gid)
+ }
+
+ // Remove capabilities if not running as root except Bounding set
+ if user.UID != 0 {
+ bounding := g.Config.Process.Capabilities.Bounding
+ g.ClearProcessCapabilities()
+ g.Config.Process.Capabilities.Bounding = bounding
+ }
+
+ return nil
+}
+
+func (b *Builder) configureEnvironment(g *generate.Generator, options RunOptions) {
+ g.ClearProcessEnv()
+ if b.CommonBuildOpts.HTTPProxy {
+ for _, envSpec := range []string{
+ "http_proxy",
+ "HTTP_PROXY",
+ "https_proxy",
+ "HTTPS_PROXY",
+ "ftp_proxy",
+ "FTP_PROXY",
+ "no_proxy",
+ "NO_PROXY",
+ } {
+ envVal := os.Getenv(envSpec)
+ if envVal != "" {
+ g.AddProcessEnv(envSpec, envVal)
+ }
+ }
+ }
+
+ for _, envSpec := range append(b.Env(), options.Env...) {
+ env := strings.SplitN(envSpec, "=", 2)
+ if len(env) > 1 {
+ g.AddProcessEnv(env[0], env[1])
+ }
+ }
+
+ for src, dest := range b.Args {
+ g.AddProcessEnv(src, dest)
+ }
+}
+
+func setupRootlessSpecChanges(spec *specs.Spec, bundleDir string, rootUID, rootGID uint32) error {
+ spec.Hostname = ""
+ spec.Process.User.AdditionalGids = nil
+ spec.Linux.Resources = nil
+
+ emptyDir := filepath.Join(bundleDir, "empty")
+ if err := os.Mkdir(emptyDir, 0); err != nil {
+ return errors.Wrapf(err, "error creating %q", emptyDir)
+ }
+
+ // Replace /sys with a read-only bind mount.
+ mounts := []specs.Mount{
+ {
+ Source: "/dev",
+ Destination: "/dev",
+ Type: "tmpfs",
+ Options: []string{"private", "strictatime", "noexec", "nosuid", "mode=755", "size=65536k"},
+ },
+ {
+ Source: "mqueue",
+ Destination: "/dev/mqueue",
+ Type: "mqueue",
+ Options: []string{"private", "nodev", "noexec", "nosuid"},
+ },
+ {
+ Source: "pts",
+ Destination: "/dev/pts",
+ Type: "devpts",
+ Options: []string{"private", "noexec", "nosuid", "newinstance", "ptmxmode=0666", "mode=0620"},
+ },
+ {
+ Source: "shm",
+ Destination: "/dev/shm",
+ Type: "tmpfs",
+ Options: []string{"private", "nodev", "noexec", "nosuid", "mode=1777", "size=65536k"},
+ },
+ {
+ Source: "/proc",
+ Destination: "/proc",
+ Type: "proc",
+ Options: []string{"private", "nodev", "noexec", "nosuid"},
+ },
+ {
+ Source: "/sys",
+ Destination: "/sys",
+ Type: "bind",
+ Options: []string{bind.NoBindOption, "rbind", "private", "nodev", "noexec", "nosuid", "ro"},
+ },
+ }
+ // Cover up /sys/fs/cgroup and /sys/fs/selinux, if they exist in our source for /sys.
+ if _, err := os.Stat("/sys/fs/cgroup"); err == nil {
+ spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/cgroup")
+ }
+ if _, err := os.Stat("/sys/fs/selinux"); err == nil {
+ spec.Linux.MaskedPaths = append(spec.Linux.MaskedPaths, "/sys/fs/selinux")
+ }
+ // Keep anything that isn't under /dev, /proc, or /sys.
+ for i := range spec.Mounts {
+ if spec.Mounts[i].Destination == "/dev" || strings.HasPrefix(spec.Mounts[i].Destination, "/dev/") ||
+ spec.Mounts[i].Destination == "/proc" || strings.HasPrefix(spec.Mounts[i].Destination, "/proc/") ||
+ spec.Mounts[i].Destination == "/sys" || strings.HasPrefix(spec.Mounts[i].Destination, "/sys/") {
+ continue
+ }
+ mounts = append(mounts, spec.Mounts[i])
+ }
+ spec.Mounts = mounts
+ return nil
+}
+
+func (b *Builder) runUsingRuntimeSubproc(isolation Isolation, options RunOptions, configureNetwork bool, configureNetworks, moreCreateArgs []string, spec *specs.Spec, rootPath, bundlePath, containerName string) (err error) {
+ var confwg sync.WaitGroup
+ config, conferr := json.Marshal(runUsingRuntimeSubprocOptions{
+ Options: options,
+ Spec: spec,
+ RootPath: rootPath,
+ BundlePath: bundlePath,
+ ConfigureNetwork: configureNetwork,
+ ConfigureNetworks: configureNetworks,
+ MoreCreateArgs: moreCreateArgs,
+ ContainerName: containerName,
+ Isolation: isolation,
+ })
+ if conferr != nil {
+ return errors.Wrapf(conferr, "error encoding configuration for %q", runUsingRuntimeCommand)
+ }
+ cmd := reexec.Command(runUsingRuntimeCommand)
+ cmd.Dir = bundlePath
+ cmd.Stdin = options.Stdin
+ if cmd.Stdin == nil {
+ cmd.Stdin = os.Stdin
+ }
+ cmd.Stdout = options.Stdout
+ if cmd.Stdout == nil {
+ cmd.Stdout = os.Stdout
+ }
+ cmd.Stderr = options.Stderr
+ if cmd.Stderr == nil {
+ cmd.Stderr = os.Stderr
+ }
+ cmd.Env = append(os.Environ(), fmt.Sprintf("LOGLEVEL=%d", logrus.GetLevel()))
+ preader, pwriter, err := os.Pipe()
+ if err != nil {
+ return errors.Wrapf(err, "error creating configuration pipe")
+ }
+ confwg.Add(1)
+ go func() {
+ _, conferr = io.Copy(pwriter, bytes.NewReader(config))
+ if conferr != nil {
+ conferr = errors.Wrapf(conferr, "error while copying configuration down pipe to child process")
+ }
+ confwg.Done()
+ }()
+ cmd.ExtraFiles = append([]*os.File{preader}, cmd.ExtraFiles...)
+ defer preader.Close()
+ defer pwriter.Close()
+ err = cmd.Run()
+ if err != nil {
+ err = errors.Wrapf(err, "error while running runtime")
+ }
+ confwg.Wait()
+ if err == nil {
+ return conferr
+ }
+ if conferr != nil {
+ logrus.Debugf("%v", conferr)
+ }
+ return err
+}
+
+func checkAndOverrideIsolationOptions(isolation Isolation, options *RunOptions) error {
+ switch isolation {
+ case IsolationOCIRootless:
+ if ns := options.NamespaceOptions.Find(string(specs.IPCNamespace)); ns == nil || ns.Host {
+ logrus.Debugf("Forcing use of an IPC namespace.")
+ }
+ options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.IPCNamespace)})
+ _, err := exec.LookPath("slirp4netns")
+ hostNetworking := err != nil
+ networkNamespacePath := ""
+ if ns := options.NamespaceOptions.Find(string(specs.NetworkNamespace)); ns != nil {
+ hostNetworking = ns.Host
+ networkNamespacePath = ns.Path
+ if !hostNetworking && networkNamespacePath != "" && !filepath.IsAbs(networkNamespacePath) {
+ logrus.Debugf("Disabling network namespace configuration.")
+ networkNamespacePath = ""
+ }
+ }
+ options.NamespaceOptions.AddOrReplace(NamespaceOption{
+ Name: string(specs.NetworkNamespace),
+ Host: hostNetworking,
+ Path: networkNamespacePath,
+ })
+ if ns := options.NamespaceOptions.Find(string(specs.PIDNamespace)); ns == nil || ns.Host {
+ logrus.Debugf("Forcing use of a PID namespace.")
+ }
+ options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.PIDNamespace), Host: false})
+ if ns := options.NamespaceOptions.Find(string(specs.UserNamespace)); ns == nil || ns.Host {
+ logrus.Debugf("Forcing use of a user namespace.")
+ }
+ options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.UserNamespace)})
+ if ns := options.NamespaceOptions.Find(string(specs.UTSNamespace)); ns != nil && !ns.Host {
+ logrus.Debugf("Disabling UTS namespace.")
+ }
+ options.NamespaceOptions.AddOrReplace(NamespaceOption{Name: string(specs.UTSNamespace), Host: true})
+ case IsolationOCI:
+ pidns := options.NamespaceOptions.Find(string(specs.PIDNamespace))
+ userns := options.NamespaceOptions.Find(string(specs.UserNamespace))
+ if (pidns == nil || pidns.Host) && (userns != nil && !userns.Host) {
+ return fmt.Errorf("not allowed to mix host PID namespace with container user namespace")
+ }
+ }
+ return nil
+}
+
+// DefaultNamespaceOptions returns the default namespace settings from the
+// runtime-tools generator library.
+func DefaultNamespaceOptions() (NamespaceOptions, error) {
+ options := NamespaceOptions{
+ {Name: string(specs.CgroupNamespace), Host: true},
+ {Name: string(specs.IPCNamespace), Host: true},
+ {Name: string(specs.MountNamespace), Host: true},
+ {Name: string(specs.NetworkNamespace), Host: true},
+ {Name: string(specs.PIDNamespace), Host: true},
+ {Name: string(specs.UserNamespace), Host: true},
+ {Name: string(specs.UTSNamespace), Host: true},
+ }
+ g, err := generate.New("linux")
+ if err != nil {
+ return options, errors.Wrapf(err, "error generating new 'linux' runtime spec")
+ }
+ spec := g.Config
+ if spec.Linux != nil {
+ for _, ns := range spec.Linux.Namespaces {
+ options.AddOrReplace(NamespaceOption{
+ Name: string(ns.Type),
+ Path: ns.Path,
+ })
+ }
+ }
+ return options, nil
+}
+
+func contains(volumes []string, v string) bool {
+ for _, i := range volumes {
+ if i == v {
+ return true
+ }
+ }
+ return false
+}
+
+type runUsingRuntimeSubprocOptions struct {
+ Options RunOptions
+ Spec *specs.Spec
+ RootPath string
+ BundlePath string
+ ConfigureNetwork bool
+ ConfigureNetworks []string
+ MoreCreateArgs []string
+ ContainerName string
+ Isolation Isolation
+}
+
+func init() {
+ reexec.Register(runUsingRuntimeCommand, runUsingRuntimeMain)
+}
diff --git a/vendor/github.com/containers/buildah/run_unsupport.go b/vendor/github.com/containers/buildah/run_unsupport.go
deleted file mode 100644
index 4824a0c4e..000000000
--- a/vendor/github.com/containers/buildah/run_unsupport.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// +build !linux
-
-package buildah
-
-import (
- "github.com/pkg/errors"
-)
-
-func setChildProcess() error {
- return errors.New("function not supported on non-linux systems")
-}
diff --git a/vendor/github.com/containers/buildah/run_unsupported.go b/vendor/github.com/containers/buildah/run_unsupported.go
new file mode 100644
index 000000000..d8ff46cf6
--- /dev/null
+++ b/vendor/github.com/containers/buildah/run_unsupported.go
@@ -0,0 +1,20 @@
+// +build !linux
+
+package buildah
+
+import (
+ "github.com/pkg/errors"
+)
+
+func setChildProcess() error {
+ return errors.New("function not supported on non-linux systems")
+}
+
+func runUsingRuntimeMain() {}
+
+func (b *Builder) Run(command []string, options RunOptions) error {
+ return errors.New("function not supported on non-linux systems")
+}
+func DefaultNamespaceOptions() (NamespaceOptions, error) {
+ return NamespaceOptions{}, errors.New("function not supported on non-linux systems")
+}
diff --git a/vendor/github.com/varlink/go/varlink/bridge_windows.go b/vendor/github.com/varlink/go/varlink/bridge_windows.go
index 220ae3156..751224ec8 100644
--- a/vendor/github.com/varlink/go/varlink/bridge_windows.go
+++ b/vendor/github.com/varlink/go/varlink/bridge_windows.go
@@ -44,8 +44,8 @@ func NewBridge(bridge string) (*Connection, error) {
}
c.conn = PipeCon{nil, cmd, &r, &w}
c.address = ""
- c.reader = bufio.NewReader(r)
- c.writer = bufio.NewWriter(w)
+ c.Reader = bufio.NewReader(r)
+ c.Writer = bufio.NewWriter(w)
err = cmd.Start()
if err != nil {
diff --git a/vendor/github.com/varlink/go/varlink/call.go b/vendor/github.com/varlink/go/varlink/call.go
index d6e046f1d..0eaf24aca 100644
--- a/vendor/github.com/varlink/go/varlink/call.go
+++ b/vendor/github.com/varlink/go/varlink/call.go
@@ -5,6 +5,7 @@ import (
"encoding/json"
"fmt"
"io"
+ "net"
"strings"
)
@@ -14,36 +15,38 @@ import (
type Call struct {
*bufio.Reader
*bufio.Writer
- in *serviceCall
+ Conn *net.Conn
+ Request *[]byte
+ In *serviceCall
Continues bool
Upgrade bool
}
// WantsMore indicates if the calling client accepts more than one reply to this method call.
func (c *Call) WantsMore() bool {
- return c.in.More
+ return c.In.More
}
// WantsUpgrade indicates that the calling client wants the connection to be upgraded.
func (c *Call) WantsUpgrade() bool {
- return c.in.Upgrade
+ return c.In.Upgrade
}
// IsOneway indicate that the calling client does not expect a reply.
func (c *Call) IsOneway() bool {
- return c.in.Oneway
+ return c.In.Oneway
}
// GetParameters retrieves the method call parameters.
func (c *Call) GetParameters(p interface{}) error {
- if c.in.Parameters == nil {
+ if c.In.Parameters == nil {
return fmt.Errorf("empty parameters")
}
- return json.Unmarshal(*c.in.Parameters, p)
+ return json.Unmarshal(*c.In.Parameters, p)
}
func (c *Call) sendMessage(r *serviceReply) error {
- if c.in.Oneway {
+ if c.In.Oneway {
return nil
}
@@ -75,7 +78,7 @@ func (c *Call) Reply(parameters interface{}) error {
})
}
- if !c.in.More {
+ if !c.In.More {
return fmt.Errorf("call did not set more, it does not expect continues")
}
diff --git a/vendor/github.com/varlink/go/varlink/service.go b/vendor/github.com/varlink/go/varlink/service.go
index abccffe6a..bf13aa1de 100644
--- a/vendor/github.com/varlink/go/varlink/service.go
+++ b/vendor/github.com/varlink/go/varlink/service.go
@@ -74,7 +74,7 @@ func (s *Service) getInterfaceDescription(c Call, name string) error {
return c.replyGetInterfaceDescription(description)
}
-func (s *Service) handleMessage(reader *bufio.Reader, writer *bufio.Writer, request []byte) error {
+func (s *Service) HandleMessage(conn *net.Conn, reader *bufio.Reader, writer *bufio.Writer, request []byte) error {
var in serviceCall
err := json.Unmarshal(request, &in)
@@ -84,9 +84,11 @@ func (s *Service) handleMessage(reader *bufio.Reader, writer *bufio.Writer, requ
}
c := Call{
- Reader: reader,
- Writer: writer,
- in: &in,
+ Conn: conn,
+ Reader: reader,
+ Writer: writer,
+ In: &in,
+ Request: &request,
}
r := strings.LastIndex(in.Method, ".")
@@ -131,7 +133,7 @@ func (s *Service) handleConnection(conn net.Conn, wg *sync.WaitGroup) {
break
}
- err = s.handleMessage(reader, writer, request[:len(request)-1])
+ err = s.HandleMessage(&conn, reader, writer, request[:len(request)-1])
if err != nil {
// FIXME: report error
//fmt.Fprintf(os.Stderr, "handleMessage: %v", err)
@@ -179,25 +181,36 @@ func (s *Service) parseAddress(address string) error {
return nil
}
-func getListener(protocol string, address string) (net.Listener, error) {
+func (s *Service) GetListener() (*net.Listener, error) {
+ s.mutex.Lock()
+ l := s.listener
+ s.mutex.Unlock()
+ return &l, nil
+}
+
+func (s *Service) setListener() error {
l := activationListener()
if l == nil {
- if protocol == "unix" && address[0] != '@' {
- os.Remove(address)
+ if s.protocol == "unix" && s.address[0] != '@' {
+ os.Remove(s.address)
}
var err error
- l, err = net.Listen(protocol, address)
+ l, err = net.Listen(s.protocol, s.address)
if err != nil {
- return nil, err
+ return err
}
- if protocol == "unix" && address[0] != '@' {
+ if s.protocol == "unix" && s.address[0] != '@' {
l.(*net.UnixListener).SetUnlinkOnClose(true)
}
}
- return l, nil
+ s.mutex.Lock()
+ s.listener = l
+ s.mutex.Unlock()
+
+ return nil
}
func (s *Service) refreshTimeout(timeout time.Duration) error {
@@ -216,26 +229,84 @@ func (s *Service) refreshTimeout(timeout time.Duration) error {
}
// Listen starts a Service.
-func (s *Service) Listen(address string, timeout time.Duration) error {
- var wg sync.WaitGroup
- defer func() { s.teardown(); wg.Wait() }()
-
+func (s *Service) Bind(address string) error {
s.mutex.Lock()
if s.running {
s.mutex.Unlock()
- return fmt.Errorf("Listen(): already running")
+ return fmt.Errorf("Init(): already running")
}
s.mutex.Unlock()
s.parseAddress(address)
- l, err := getListener(s.protocol, s.address)
+ err := s.setListener()
+ if err != nil {
+ return err
+ }
+ return nil
+}
+
+// Listen starts a Service.
+func (s *Service) Listen(address string, timeout time.Duration) error {
+ var wg sync.WaitGroup
+ defer func() { s.teardown(); wg.Wait() }()
+
+ err := s.Bind(address)
if err != nil {
return err
}
s.mutex.Lock()
- s.listener = l
+ s.running = true
+ l := s.listener
+ s.mutex.Unlock()
+
+ for s.running {
+ if timeout != 0 {
+ if err := s.refreshTimeout(timeout); err != nil {
+ return err
+ }
+ }
+ conn, err := l.Accept()
+ if err != nil {
+ if err.(net.Error).Timeout() {
+ s.mutex.Lock()
+ if s.conncounter == 0 {
+ s.mutex.Unlock()
+ return ServiceTimeoutError{}
+ }
+ s.mutex.Unlock()
+ continue
+ }
+ if !s.running {
+ return nil
+ }
+ return err
+ }
+ s.mutex.Lock()
+ s.conncounter++
+ s.mutex.Unlock()
+ wg.Add(1)
+ go s.handleConnection(conn, &wg)
+ }
+
+ return nil
+}
+
+// Listen starts a Service.
+func (s *Service) DoListen(timeout time.Duration) error {
+ var wg sync.WaitGroup
+ defer func() { s.teardown(); wg.Wait() }()
+
+ s.mutex.Lock()
+ l := s.listener
+ s.mutex.Unlock()
+
+ if l == nil {
+ return fmt.Errorf("No listener set")
+ }
+
+ s.mutex.Lock()
s.running = true
s.mutex.Unlock()
diff --git a/vendor/github.com/varlink/go/varlink/varlink_test.go b/vendor/github.com/varlink/go/varlink/varlink_test.go
index 9dd4ddc63..9e6d0a1f4 100644
--- a/vendor/github.com/varlink/go/varlink/varlink_test.go
+++ b/vendor/github.com/varlink/go/varlink/varlink_test.go
@@ -31,7 +31,7 @@ func TestService(t *testing.T) {
r := bufio.NewReader(&br)
var b bytes.Buffer
w := bufio.NewWriter(&b)
- if err := service.handleMessage(r, w, []byte{0}); err == nil {
+ if err := service.HandleMessage(nil, r, w, []byte{0}); err == nil {
t.Fatal("HandleMessage returned non-error")
}
})
@@ -42,7 +42,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"foo.GetInterfaceDescription" fdgdfg}`)
- if err := service.handleMessage(r, w, msg); err == nil {
+ if err := service.HandleMessage(nil, r, w, msg); err == nil {
t.Fatal("HandleMessage returned no error on invalid json")
}
})
@@ -53,7 +53,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"foo.GetInterfaceDescription"}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatal("HandleMessage returned error on wrong interface")
}
expect(t, `{"parameters":{"interface":"foo"},"error":"org.varlink.service.InterfaceNotFound"}`+"\000",
@@ -66,7 +66,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"InvalidMethod"}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatal("HandleMessage returned error on invalid method")
}
expect(t, `{"parameters":{"parameter":"method"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
@@ -79,7 +79,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.WrongMethod"}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatal("HandleMessage returned error on wrong method")
}
expect(t, `{"parameters":{"method":"WrongMethod"},"error":"org.varlink.service.MethodNotFound"}`+"\000",
@@ -92,7 +92,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters": null}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"parameter":"parameters"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
@@ -105,7 +105,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{}}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"parameter":"interface"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
@@ -118,7 +118,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{"interface":"foo"}}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"parameter":"interface"},"error":"org.varlink.service.InvalidParameter"}`+"\000",
@@ -131,7 +131,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.GetInterfaceDescription","parameters":{"interface":"org.varlink.service"}}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"description":"# The Varlink Service Interface is provided by every varlink service. It\n# describes the service and the interfaces it implements.\ninterface org.varlink.service\n\n# Get a list of all the interfaces a service provides and information\n# about the implementation.\nmethod GetInfo() -\u003e (\n vendor: string,\n product: string,\n version: string,\n url: string,\n interfaces: []string\n)\n\n# Get the description of an interface that is implemented by this service.\nmethod GetInterfaceDescription(interface: string) -\u003e (description: string)\n\n# The requested interface was not found.\nerror InterfaceNotFound (interface: string)\n\n# The requested method was not found\nerror MethodNotFound (method: string)\n\n# The interface defines the requested method, but the service does not\n# implement it.\nerror MethodNotImplemented (method: string)\n\n# One of the passed parameters is invalid.\nerror InvalidParameter (parameter: string)"}}`+"\000",
@@ -144,7 +144,7 @@ func TestService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.varlink.service.GetInfo"}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"vendor":"Varlink","product":"Varlink Test","version":"1","url":"https://github.com/varlink/go/varlink","interfaces":["org.varlink.service"]}}`+"\000",
@@ -224,7 +224,7 @@ func TestMoreService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.example.test.Pingf"}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"parameters":{"method":"Pingf"},"error":"org.varlink.service.MethodNotImplemented"}`+"\000",
@@ -237,7 +237,7 @@ func TestMoreService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.example.test.PingError", "more" : true}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"error":"org.example.test.PingError"}`+"\000",
@@ -249,7 +249,7 @@ func TestMoreService(t *testing.T) {
var b bytes.Buffer
w := bufio.NewWriter(&b)
msg := []byte(`{"method":"org.example.test.Ping", "more" : true}`)
- if err := service.handleMessage(r, w, msg); err != nil {
+ if err := service.HandleMessage(nil, r, w, msg); err != nil {
t.Fatalf("HandleMessage returned error: %v", err)
}
expect(t, `{"continues":true}`+"\000"+`{"continues":true}`+"\000"+`{}`+"\000",