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Diffstat (limited to 'libpod/container_internal.go')
-rw-r--r--libpod/container_internal.go445
1 files changed, 163 insertions, 282 deletions
diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index 2af216358..934ad7a22 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -12,14 +12,14 @@ import (
"strconv"
"strings"
"syscall"
+ "time"
"github.com/containers/buildah/imagebuildah"
- "github.com/containers/libpod/pkg/chrootuser"
+ "github.com/containers/libpod/pkg/ctime"
"github.com/containers/libpod/pkg/hooks"
"github.com/containers/libpod/pkg/hooks/exec"
- "github.com/containers/libpod/pkg/resolvconf"
+ "github.com/containers/libpod/pkg/lookup"
"github.com/containers/libpod/pkg/rootless"
- "github.com/containers/libpod/pkg/secrets"
"github.com/containers/storage"
"github.com/containers/storage/pkg/archive"
"github.com/containers/storage/pkg/chrootarchive"
@@ -30,6 +30,7 @@ import (
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/text/language"
+ kwait "k8s.io/apimachinery/pkg/util/wait"
)
const (
@@ -146,6 +147,77 @@ func (c *Container) execPidPath(sessionID string) string {
return filepath.Join(c.state.RunDir, "exec_pid_"+sessionID)
}
+// exitFilePath gets the path to the container's exit file
+func (c *Container) exitFilePath() string {
+ return filepath.Join(c.runtime.ociRuntime.exitsDir, c.ID())
+}
+
+// Wait for the container's exit file to appear.
+// When it does, update our state based on it.
+func (c *Container) waitForExitFileAndSync() error {
+ exitFile := c.exitFilePath()
+
+ err := kwait.ExponentialBackoff(
+ kwait.Backoff{
+ Duration: 500 * time.Millisecond,
+ Factor: 1.2,
+ Steps: 6,
+ },
+ func() (bool, error) {
+ _, err := os.Stat(exitFile)
+ if err != nil {
+ // wait longer
+ return false, nil
+ }
+ return true, nil
+ })
+ if err != nil {
+ // Exit file did not appear
+ // Reset our state
+ c.state.ExitCode = -1
+ c.state.FinishedTime = time.Now()
+ c.state.State = ContainerStateStopped
+
+ if err2 := c.save(); err2 != nil {
+ logrus.Errorf("Error saving container %s state: %v", c.ID(), err2)
+ }
+
+ return err
+ }
+
+ if err := c.runtime.ociRuntime.updateContainerStatus(c, false); err != nil {
+ return err
+ }
+
+ return c.save()
+}
+
+// Handle the container exit file.
+// The exit file is used to supply container exit time and exit code.
+// This assumes the exit file already exists.
+func (c *Container) handleExitFile(exitFile string, fi os.FileInfo) error {
+ c.state.FinishedTime = ctime.Created(fi)
+ statusCodeStr, err := ioutil.ReadFile(exitFile)
+ if err != nil {
+ return errors.Wrapf(err, "failed to read exit file for container %s", c.ID())
+ }
+ statusCode, err := strconv.Atoi(string(statusCodeStr))
+ if err != nil {
+ return errors.Wrapf(err, "error converting exit status code (%q) for container %s to int",
+ c.ID(), statusCodeStr)
+ }
+ c.state.ExitCode = int32(statusCode)
+
+ oomFilePath := filepath.Join(c.bundlePath(), "oom")
+ if _, err = os.Stat(oomFilePath); err == nil {
+ c.state.OOMKilled = true
+ }
+
+ c.state.Exited = true
+
+ return nil
+}
+
// Sync this container with on-disk state and runtime status
// Should only be called with container lock held
// This function should suffice to ensure a container's state is accurate and
@@ -161,7 +233,7 @@ func (c *Container) syncContainer() error {
(c.state.State != ContainerStateExited) {
oldState := c.state.State
// TODO: optionally replace this with a stat for the exit file
- if err := c.runtime.ociRuntime.updateContainerStatus(c); err != nil {
+ if err := c.runtime.ociRuntime.updateContainerStatus(c, false); err != nil {
return err
}
// Only save back to DB if state changed
@@ -201,6 +273,27 @@ func (c *Container) setupStorage(ctx context.Context) error {
},
LabelOpts: c.config.LabelOpts,
}
+ if c.config.Privileged {
+ privOpt := func(opt string) bool {
+ for _, privopt := range []string{"nodev", "nosuid", "noexec"} {
+ if opt == privopt {
+ return true
+ }
+ }
+ return false
+ }
+ defOptions, err := storage.GetDefaultMountOptions()
+ if err != nil {
+ return errors.Wrapf(err, "error getting default mount options")
+ }
+ var newOptions []string
+ for _, opt := range defOptions {
+ if !privOpt(opt) {
+ newOptions = append(newOptions, opt)
+ }
+ }
+ options.MountOpts = newOptions
+ }
if c.config.Rootfs == "" {
options.IDMappingOptions = c.config.IDMappings
@@ -508,13 +601,13 @@ func (c *Container) checkDependenciesRunningLocked(depCtrs map[string]*Container
}
func (c *Container) completeNetworkSetup() error {
- if !c.config.PostConfigureNetNS {
+ if !c.config.PostConfigureNetNS || c.NetworkDisabled() {
return nil
}
if err := c.syncContainer(); err != nil {
return err
}
- if rootless.IsRootless() {
+ if c.config.NetMode == "slirp4netns" {
return c.runtime.setupRootlessNetNS(c)
}
return c.runtime.setupNetNS(c)
@@ -522,10 +615,6 @@ func (c *Container) completeNetworkSetup() error {
// Initialize a container, creating it in the runtime
func (c *Container) init(ctx context.Context) error {
- if err := c.makeBindMounts(); err != nil {
- return err
- }
-
// Generate the OCI spec
spec, err := c.generateSpec(ctx)
if err != nil {
@@ -538,7 +627,7 @@ func (c *Container) init(ctx context.Context) error {
}
// With the spec complete, do an OCI create
- if err := c.runtime.ociRuntime.createContainer(c, c.config.CgroupParent, false); err != nil {
+ if err := c.runtime.ociRuntime.createContainer(c, c.config.CgroupParent, nil); err != nil {
return err
}
@@ -622,9 +711,6 @@ func (c *Container) initAndStart(ctx context.Context) (err error) {
return errors.Wrapf(ErrCtrStateInvalid, "cannot start paused container %s", c.ID())
}
- if err := c.prepare(); err != nil {
- return err
- }
defer func() {
if err != nil {
if err2 := c.cleanup(ctx); err2 != nil {
@@ -633,6 +719,10 @@ func (c *Container) initAndStart(ctx context.Context) (err error) {
}
}()
+ if err := c.prepare(); err != nil {
+ return err
+ }
+
// If we are ContainerStateStopped we need to remove from runtime
// And reset to ContainerStateConfigured
if c.state.State == ContainerStateStopped {
@@ -672,13 +762,8 @@ func (c *Container) stop(timeout uint) error {
return err
}
- // Sync the container's state to pick up return code
- if err := c.runtime.ociRuntime.updateContainerStatus(c); err != nil {
- return err
- }
-
- // Container should clean itself up
- return nil
+ // Wait until we have an exit file, and sync once we do
+ return c.waitForExitFileAndSync()
}
// Internal, non-locking function to pause a container
@@ -718,9 +803,6 @@ func (c *Container) restartWithTimeout(ctx context.Context, timeout uint) (err e
return err
}
}
- if err := c.prepare(); err != nil {
- return err
- }
defer func() {
if err != nil {
if err2 := c.cleanup(ctx); err2 != nil {
@@ -728,6 +810,9 @@ func (c *Container) restartWithTimeout(ctx context.Context, timeout uint) (err e
}
}
}()
+ if err := c.prepare(); err != nil {
+ return err
+ }
if c.state.State == ContainerStateStopped {
// Reinitialize the container if we need to
@@ -757,28 +842,22 @@ func (c *Container) mountStorage() (string, error) {
return c.state.Mountpoint, nil
}
- if !rootless.IsRootless() {
- // TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts
- mounted, err := mount.Mounted(c.config.ShmDir)
- if err != nil {
- return "", errors.Wrapf(err, "unable to determine if %q is mounted", c.config.ShmDir)
- }
+ mounted, err := mount.Mounted(c.config.ShmDir)
+ if err != nil {
+ return "", errors.Wrapf(err, "unable to determine if %q is mounted", c.config.ShmDir)
+ }
+ if !mounted {
+ shmOptions := fmt.Sprintf("mode=1777,size=%d", c.config.ShmSize)
+ if err := c.mountSHM(shmOptions); err != nil {
+ return "", err
+ }
if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil {
return "", errors.Wrapf(err, "failed to chown %s", c.config.ShmDir)
}
-
- if !mounted {
- shmOptions := fmt.Sprintf("mode=1777,size=%d", c.config.ShmSize)
- if err := c.mountSHM(shmOptions); err != nil {
- return "", err
- }
- if err := os.Chown(c.config.ShmDir, c.RootUID(), c.RootGID()); err != nil {
- return "", errors.Wrapf(err, "failed to chown %s", c.config.ShmDir)
- }
- }
}
+ // TODO: generalize this mount code so it will mount every mount in ctr.config.Mounts
mountPoint := c.config.Rootfs
if mountPoint == "" {
mountPoint, err = c.mount()
@@ -916,86 +995,6 @@ func (c *Container) postDeleteHooks(ctx context.Context) (err error) {
return nil
}
-// Make standard bind mounts to include in the container
-func (c *Container) makeBindMounts() error {
- if err := os.Chown(c.state.RunDir, c.RootUID(), c.RootGID()); err != nil {
- return errors.Wrapf(err, "cannot chown run directory %s", c.state.RunDir)
- }
-
- if c.state.BindMounts == nil {
- c.state.BindMounts = make(map[string]string)
- }
-
- // SHM is always added when we mount the container
- c.state.BindMounts["/dev/shm"] = c.config.ShmDir
-
- // Make /etc/resolv.conf
- if _, ok := c.state.BindMounts["/etc/resolv.conf"]; ok {
- // If it already exists, delete so we can recreate
- delete(c.state.BindMounts, "/etc/resolv.conf")
- }
- newResolv, err := c.generateResolvConf()
- if err != nil {
- return errors.Wrapf(err, "error creating resolv.conf for container %s", c.ID())
- }
- c.state.BindMounts["/etc/resolv.conf"] = newResolv
-
- newPasswd, err := c.generatePasswd()
- if err != nil {
- return errors.Wrapf(err, "error creating temporary passwd file for container %s", c.ID())
- }
- if newPasswd != "" {
- // Make /etc/passwd
- if _, ok := c.state.BindMounts["/etc/passwd"]; ok {
- // If it already exists, delete so we can recreate
- delete(c.state.BindMounts, "/etc/passwd")
- }
- logrus.Debugf("adding entry to /etc/passwd for non existent default user")
- c.state.BindMounts["/etc/passwd"] = newPasswd
- }
- // Make /etc/hosts
- if _, ok := c.state.BindMounts["/etc/hosts"]; ok {
- // If it already exists, delete so we can recreate
- delete(c.state.BindMounts, "/etc/hosts")
- }
- newHosts, err := c.generateHosts()
- if err != nil {
- return errors.Wrapf(err, "error creating hosts file for container %s", c.ID())
- }
- c.state.BindMounts["/etc/hosts"] = newHosts
-
- // Make /etc/hostname
- // This should never change, so no need to recreate if it exists
- if _, ok := c.state.BindMounts["/etc/hostname"]; !ok {
- hostnamePath, err := c.writeStringToRundir("hostname", c.Hostname())
- if err != nil {
- return errors.Wrapf(err, "error creating hostname file for container %s", c.ID())
- }
- c.state.BindMounts["/etc/hostname"] = hostnamePath
- }
-
- // Make .containerenv
- // Empty file, so no need to recreate if it exists
- if _, ok := c.state.BindMounts["/run/.containerenv"]; !ok {
- // Empty string for now, but we may consider populating this later
- containerenvPath, err := c.writeStringToRundir(".containerenv", "")
- if err != nil {
- return errors.Wrapf(err, "error creating containerenv file for container %s", c.ID())
- }
- c.state.BindMounts["/run/.containerenv"] = containerenvPath
- }
-
- // Add Secret Mounts
- secretMounts := secrets.SecretMountsWithUIDGID(c.config.MountLabel, c.state.RunDir, c.runtime.config.DefaultMountsFile, c.state.DestinationRunDir, c.RootUID(), c.RootGID())
- for _, mount := range secretMounts {
- if _, ok := c.state.BindMounts[mount.Destination]; !ok {
- c.state.BindMounts[mount.Destination] = mount.Source
- }
- }
-
- return nil
-}
-
// writeStringToRundir copies the provided file to the runtimedir
func (c *Container) writeStringToRundir(destFile, output string) (string, error) {
destFileName := filepath.Join(c.state.RunDir, destFile)
@@ -1024,135 +1023,8 @@ func (c *Container) writeStringToRundir(destFile, output string) (string, error)
return filepath.Join(c.state.DestinationRunDir, destFile), nil
}
-// generatePasswd generates a container specific passwd file,
-// iff g.config.User is a number
-func (c *Container) generatePasswd() (string, error) {
- var (
- groupspec string
- gid uint32
- )
- if c.config.User == "" {
- return "", nil
- }
- spec := strings.SplitN(c.config.User, ":", 2)
- userspec := spec[0]
- if len(spec) > 1 {
- groupspec = spec[1]
- }
- // If a non numeric User, then don't generate passwd
- uid, err := strconv.ParseUint(userspec, 10, 32)
- if err != nil {
- return "", nil
- }
- // if UID exists inside of container rootfs /etc/passwd then
- // don't generate passwd
- if _, _, err := chrootuser.LookupUIDInContainer(c.state.Mountpoint, uid); err == nil {
- return "", nil
- }
- if err == nil && groupspec != "" {
- if !c.state.Mounted {
- return "", errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate group field for passwd record", c.ID())
- }
- gid, err = chrootuser.GetGroup(c.state.Mountpoint, groupspec)
- if err != nil {
- return "", errors.Wrapf(err, "unable to get gid from %s formporary passwd file")
- }
- }
-
- originPasswdFile := filepath.Join(c.state.Mountpoint, "/etc/passwd")
- orig, err := ioutil.ReadFile(originPasswdFile)
- if err != nil {
- return "", errors.Wrapf(err, "unable to read passwd file %s", originPasswdFile)
- }
-
- pwd := fmt.Sprintf("%s%d:x:%d:%d:container user:%s:/bin/sh\n", orig, uid, uid, gid, c.WorkingDir())
- passwdFile, err := c.writeStringToRundir("passwd", pwd)
- if err != nil {
- return "", errors.Wrapf(err, "failed to create temporary passwd file")
- }
- if os.Chmod(passwdFile, 0644); err != nil {
- return "", err
- }
- return passwdFile, nil
-}
-
-// generateResolvConf generates a containers resolv.conf
-func (c *Container) generateResolvConf() (string, error) {
- // Determine the endpoint for resolv.conf in case it is a symlink
- resolvPath, err := filepath.EvalSymlinks("/etc/resolv.conf")
- if err != nil {
- return "", err
- }
-
- contents, err := ioutil.ReadFile(resolvPath)
- if err != nil {
- return "", errors.Wrapf(err, "unable to read %s", resolvPath)
- }
-
- // Process the file to remove localhost nameservers
- // TODO: set ipv6 enable bool more sanely
- resolv, err := resolvconf.FilterResolvDNS(contents, true)
- if err != nil {
- return "", errors.Wrapf(err, "error parsing host resolv.conf")
- }
-
- // Make a new resolv.conf
- nameservers := resolvconf.GetNameservers(resolv.Content)
- if len(c.config.DNSServer) > 0 {
- // We store DNS servers as net.IP, so need to convert to string
- nameservers = []string{}
- for _, server := range c.config.DNSServer {
- nameservers = append(nameservers, server.String())
- }
- }
-
- search := resolvconf.GetSearchDomains(resolv.Content)
- if len(c.config.DNSSearch) > 0 {
- search = c.config.DNSSearch
- }
-
- options := resolvconf.GetOptions(resolv.Content)
- if len(c.config.DNSOption) > 0 {
- options = c.config.DNSOption
- }
-
- destPath := filepath.Join(c.state.RunDir, "resolv.conf")
-
- if err := os.Remove(destPath); err != nil && !os.IsNotExist(err) {
- return "", errors.Wrapf(err, "error removing resolv.conf for container %s", c.ID())
- }
-
- // Build resolv.conf
- if _, err = resolvconf.Build(destPath, nameservers, search, options); err != nil {
- return "", errors.Wrapf(err, "error building resolv.conf for container %s")
- }
-
- // Relabel resolv.conf for the container
- if err := label.Relabel(destPath, c.config.MountLabel, false); err != nil {
- return "", err
- }
-
- return filepath.Join(c.state.DestinationRunDir, "resolv.conf"), nil
-}
-
-// generateHosts creates a containers hosts file
-func (c *Container) generateHosts() (string, error) {
- orig, err := ioutil.ReadFile("/etc/hosts")
- if err != nil {
- return "", errors.Wrapf(err, "unable to read /etc/hosts")
- }
- hosts := string(orig)
- if len(c.config.HostAdd) > 0 {
- for _, host := range c.config.HostAdd {
- // the host format has already been verified at this point
- fields := strings.SplitN(host, ":", 2)
- hosts += fmt.Sprintf("%s %s\n", fields[1], fields[0])
- }
- }
- return c.writeStringToRundir("hosts", hosts)
-}
-
func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator) error {
+ var uid, gid int
mountPoint := c.state.Mountpoint
if !c.state.Mounted {
return errors.Wrapf(ErrInternal, "container is not mounted")
@@ -1176,6 +1048,18 @@ func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator)
}
}
+ if c.config.User != "" {
+ if !c.state.Mounted {
+ return errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate User field", c.ID())
+ }
+ execUser, err := lookup.GetUserGroupInfo(c.state.Mountpoint, c.config.User, nil)
+ if err != nil {
+ return err
+ }
+ uid = execUser.Uid
+ gid = execUser.Gid
+ }
+
for k := range imageData.ContainerConfig.Volumes {
mount := spec.Mount{
Destination: k,
@@ -1186,19 +1070,6 @@ func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator)
continue
}
volumePath := filepath.Join(c.config.StaticDir, "volumes", k)
- var (
- uid uint32
- gid uint32
- )
- if c.config.User != "" {
- if !c.state.Mounted {
- return errors.Wrapf(ErrCtrStateInvalid, "container %s must be mounted in order to translate User field", c.ID())
- }
- uid, gid, err = chrootuser.GetUser(c.state.Mountpoint, c.config.User)
- if err != nil {
- return err
- }
- }
// Ensure the symlinks are resolved
resolvedSymlink, err := imagebuildah.ResolveSymLink(mountPoint, k)
@@ -1218,7 +1089,7 @@ func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator)
return errors.Wrapf(err, "error creating directory %q for volume %q in container %q", volumePath, k, c.ID())
}
- if err = os.Chown(srcPath, int(uid), int(gid)); err != nil {
+ if err = os.Chown(srcPath, uid, gid); err != nil {
return errors.Wrapf(err, "error chowning directory %q for volume %q in container %q", srcPath, k, c.ID())
}
}
@@ -1228,7 +1099,7 @@ func (c *Container) addLocalVolumes(ctx context.Context, g *generate.Generator)
return errors.Wrapf(err, "error creating directory %q for volume %q in container %q", volumePath, k, c.ID())
}
- if err = os.Chown(volumePath, int(uid), int(gid)); err != nil {
+ if err = os.Chown(volumePath, uid, gid); err != nil {
return errors.Wrapf(err, "error chowning directory %q for volume %q in container %q", volumePath, k, c.ID())
}
@@ -1297,10 +1168,6 @@ func (c *Container) saveSpec(spec *spec.Spec) error {
}
func (c *Container) setupOCIHooks(ctx context.Context, config *spec.Spec) (extensionStageHooks map[string][]spec.Hook, err error) {
- if len(c.runtime.config.HooksDir) == 0 {
- return nil, nil
- }
-
var locale string
var ok bool
for _, envVar := range []string{
@@ -1328,25 +1195,39 @@ func (c *Container) setupOCIHooks(ctx context.Context, config *spec.Spec) (exten
}
}
- allHooks := make(map[string][]spec.Hook)
- for _, hDir := range c.runtime.config.HooksDir {
- manager, err := hooks.New(ctx, []string{hDir}, []string{"poststop"}, lang)
- if err != nil {
- if c.runtime.config.HooksDirNotExistFatal || !os.IsNotExist(err) {
- return nil, err
- }
- logrus.Warnf("failed to load hooks: {}", err)
+ if c.runtime.config.HooksDir == nil {
+ if rootless.IsRootless() {
return nil, nil
}
- hooks, err := manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0)
- if err != nil {
- return nil, err
- }
- for i, hook := range hooks {
- allHooks[i] = hook
+ allHooks := make(map[string][]spec.Hook)
+ for _, hDir := range []string{hooks.DefaultDir, hooks.OverrideDir} {
+ manager, err := hooks.New(ctx, []string{hDir}, []string{"poststop"}, lang)
+ if err != nil {
+ if os.IsNotExist(err) {
+ continue
+ }
+ return nil, err
+ }
+ hooks, err := manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0)
+ if err != nil {
+ return nil, err
+ }
+ if len(hooks) > 0 || config.Hooks != nil {
+ logrus.Warnf("implicit hook directories are deprecated; set --hooks-dir=%q explicitly to continue to load hooks from this directory", hDir)
+ }
+ for i, hook := range hooks {
+ allHooks[i] = hook
+ }
}
+ return allHooks, nil
}
- return allHooks, nil
+
+ manager, err := hooks.New(ctx, c.runtime.config.HooksDir, []string{"poststop"}, lang)
+ if err != nil {
+ return nil, err
+ }
+
+ return manager.Hooks(config, c.Spec().Annotations, len(c.config.UserVolumes) > 0)
}
// mount mounts the container's root filesystem
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-02-20 18:27:02 +0000