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Diffstat (limited to 'runsc/container/container.go')
-rw-r--r--runsc/container/container.go156
1 files changed, 75 insertions, 81 deletions
diff --git a/runsc/container/container.go b/runsc/container/container.go
index 52e1755ce..435d866f5 100644
--- a/runsc/container/container.go
+++ b/runsc/container/container.go
@@ -159,9 +159,9 @@ func loadSandbox(rootDir, id string) ([]*Container, error) {
// container to which id unambiguously refers to. Returns ErrNotExist if
// container doesn't exist.
func Load(rootDir, partialID string) (*Container, error) {
- log.Debugf("Load container %q %q", rootDir, partialID)
+ log.Debugf("Load container, rootDir: %q, partial cid: %s", rootDir, partialID)
if err := validateID(partialID); err != nil {
- return nil, fmt.Errorf("validating id: %v", err)
+ return nil, fmt.Errorf("invalid container id: %v", err)
}
id, err := findContainerID(rootDir, partialID)
@@ -184,22 +184,31 @@ func Load(rootDir, partialID string) (*Container, error) {
}
return nil, fmt.Errorf("reading container metadata file %q: %v", state.statePath(), err)
}
+ return c, nil
+}
+
+// LoadAndCheck is similar to Load(), but also checks if the container is still
+// running to get an error earlier to the caller.
+func LoadAndCheck(rootDir, partialID string) (*Container, error) {
+ c, err := Load(rootDir, partialID)
+ if err != nil {
+ // Preserve error so that callers can distinguish 'not found' errors.
+ return nil, err
+ }
- // If the status is "Running" or "Created", check that the sandbox
- // process still exists, and set it to Stopped if it does not.
+ // If the status is "Running" or "Created", check that the sandbox/container
+ // is still running, setting it to Stopped if not.
//
// This is inherently racy.
- if c.Status == Running || c.Status == Created {
- // Check if the sandbox process is still running.
+ switch c.Status {
+ case Created:
if !c.isSandboxRunning() {
// Sandbox no longer exists, so this container definitely does not exist.
c.changeStatus(Stopped)
- } else if c.Status == Running {
- // Container state should reflect the actual state of the application, so
- // we don't consider gofer process here.
- if err := c.SignalContainer(syscall.Signal(0), false); err != nil {
- c.changeStatus(Stopped)
- }
+ }
+ case Running:
+ if err := c.SignalContainer(syscall.Signal(0), false); err != nil {
+ c.changeStatus(Stopped)
}
}
@@ -271,7 +280,7 @@ type Args struct {
// indicates that an existing Sandbox should be used. The caller must call
// Destroy() on the container.
func New(conf *config.Config, args Args) (*Container, error) {
- log.Debugf("Create container %q in root dir: %s", args.ID, conf.RootDir)
+ log.Debugf("Create container, cid: %s, rootDir: %q", args.ID, conf.RootDir)
if err := validateID(args.ID); err != nil {
return nil, err
}
@@ -310,7 +319,7 @@ func New(conf *config.Config, args Args) (*Container, error) {
// indicate the ID of the sandbox, which is the same as the ID of the
// init container in the sandbox.
if isRoot(args.Spec) {
- log.Debugf("Creating new sandbox for container %q", args.ID)
+ log.Debugf("Creating new sandbox for container, cid: %s", args.ID)
if args.Spec.Linux == nil {
args.Spec.Linux = &specs.Linux{}
@@ -380,10 +389,10 @@ func New(conf *config.Config, args Args) (*Container, error) {
if !ok {
return nil, fmt.Errorf("no sandbox ID found when creating container")
}
- log.Debugf("Creating new container %q in sandbox %q", c.ID, sbid)
+ log.Debugf("Creating new container, cid: %s, sandbox: %s", c.ID, sbid)
// Find the sandbox associated with this ID.
- sb, err := Load(conf.RootDir, sbid)
+ sb, err := LoadAndCheck(conf.RootDir, sbid)
if err != nil {
return nil, err
}
@@ -413,7 +422,7 @@ func New(conf *config.Config, args Args) (*Container, error) {
// Start starts running the containerized process inside the sandbox.
func (c *Container) Start(conf *config.Config) error {
- log.Debugf("Start container %q", c.ID)
+ log.Debugf("Start container, cid: %s", c.ID)
if err := c.Saver.lock(); err != nil {
return err
@@ -476,7 +485,7 @@ func (c *Container) Start(conf *config.Config) error {
unlock.Clean()
// Adjust the oom_score_adj for sandbox. This must be done after saveLocked().
- if err := adjustSandboxOOMScoreAdj(c.Sandbox, c.Saver.RootDir, false); err != nil {
+ if err := adjustSandboxOOMScoreAdj(c.Sandbox, c.Spec, c.Saver.RootDir, false); err != nil {
return err
}
@@ -488,7 +497,7 @@ func (c *Container) Start(conf *config.Config) error {
// Restore takes a container and replaces its kernel and file system
// to restore a container from its state file.
func (c *Container) Restore(spec *specs.Spec, conf *config.Config, restoreFile string) error {
- log.Debugf("Restore container %q", c.ID)
+ log.Debugf("Restore container, cid: %s", c.ID)
if err := c.Saver.lock(); err != nil {
return err
}
@@ -515,7 +524,7 @@ func (c *Container) Restore(spec *specs.Spec, conf *config.Config, restoreFile s
// Run is a helper that calls Create + Start + Wait.
func Run(conf *config.Config, args Args) (syscall.WaitStatus, error) {
- log.Debugf("Run container %q in root dir: %s", args.ID, conf.RootDir)
+ log.Debugf("Run container, cid: %s, rootDir: %q", args.ID, conf.RootDir)
c, err := New(conf, args)
if err != nil {
return 0, fmt.Errorf("creating container: %v", err)
@@ -547,7 +556,7 @@ func Run(conf *config.Config, args Args) (syscall.WaitStatus, error) {
// Execute runs the specified command in the container. It returns the PID of
// the newly created process.
func (c *Container) Execute(args *control.ExecArgs) (int32, error) {
- log.Debugf("Execute in container %q, args: %+v", c.ID, args)
+ log.Debugf("Execute in container, cid: %s, args: %+v", c.ID, args)
if err := c.requireStatus("execute in", Created, Running); err != nil {
return 0, err
}
@@ -557,7 +566,7 @@ func (c *Container) Execute(args *control.ExecArgs) (int32, error) {
// Event returns events for the container.
func (c *Container) Event() (*boot.Event, error) {
- log.Debugf("Getting events for container %q", c.ID)
+ log.Debugf("Getting events for container, cid: %s", c.ID)
if err := c.requireStatus("get events for", Created, Running, Paused); err != nil {
return nil, err
}
@@ -577,14 +586,14 @@ func (c *Container) SandboxPid() int {
// Call to wait on a stopped container is needed to retrieve the exit status
// and wait returns immediately.
func (c *Container) Wait() (syscall.WaitStatus, error) {
- log.Debugf("Wait on container %q", c.ID)
+ log.Debugf("Wait on container, cid: %s", c.ID)
return c.Sandbox.Wait(c.ID)
}
// WaitRootPID waits for process 'pid' in the sandbox's PID namespace and
// returns its WaitStatus.
func (c *Container) WaitRootPID(pid int32) (syscall.WaitStatus, error) {
- log.Debugf("Wait on PID %d in sandbox %q", pid, c.Sandbox.ID)
+ log.Debugf("Wait on process %d in sandbox, cid: %s", pid, c.Sandbox.ID)
if !c.isSandboxRunning() {
return 0, fmt.Errorf("sandbox is not running")
}
@@ -594,7 +603,7 @@ func (c *Container) WaitRootPID(pid int32) (syscall.WaitStatus, error) {
// WaitPID waits for process 'pid' in the container's PID namespace and returns
// its WaitStatus.
func (c *Container) WaitPID(pid int32) (syscall.WaitStatus, error) {
- log.Debugf("Wait on PID %d in container %q", pid, c.ID)
+ log.Debugf("Wait on process %d in container, cid: %s", pid, c.ID)
if !c.isSandboxRunning() {
return 0, fmt.Errorf("sandbox is not running")
}
@@ -606,7 +615,7 @@ func (c *Container) WaitPID(pid int32) (syscall.WaitStatus, error) {
// SignalContainer returns an error if the container is already stopped.
// TODO(b/113680494): Distinguish different error types.
func (c *Container) SignalContainer(sig syscall.Signal, all bool) error {
- log.Debugf("Signal container %q: %v", c.ID, sig)
+ log.Debugf("Signal container, cid: %s, signal: %v (%d)", c.ID, sig, sig)
// Signaling container in Stopped state is allowed. When all=false,
// an error will be returned anyway; when all=true, this allows
// sending signal to other processes inside the container even
@@ -623,7 +632,7 @@ func (c *Container) SignalContainer(sig syscall.Signal, all bool) error {
// SignalProcess sends sig to a specific process in the container.
func (c *Container) SignalProcess(sig syscall.Signal, pid int32) error {
- log.Debugf("Signal process %d in container %q: %v", pid, c.ID, sig)
+ log.Debugf("Signal process %d in container, cid: %s, signal: %v (%d)", pid, c.ID, sig, sig)
if err := c.requireStatus("signal a process inside", Running); err != nil {
return err
}
@@ -637,15 +646,15 @@ func (c *Container) SignalProcess(sig syscall.Signal, pid int32) error {
// container process inside the sandbox. It returns a function that will stop
// forwarding signals.
func (c *Container) ForwardSignals(pid int32, fgProcess bool) func() {
- log.Debugf("Forwarding all signals to container %q PID %d fgProcess=%t", c.ID, pid, fgProcess)
+ log.Debugf("Forwarding all signals to container, cid: %s, PIDPID: %d, fgProcess: %t", c.ID, pid, fgProcess)
stop := sighandling.StartSignalForwarding(func(sig linux.Signal) {
- log.Debugf("Forwarding signal %d to container %q PID %d fgProcess=%t", sig, c.ID, pid, fgProcess)
+ log.Debugf("Forwarding signal %d to container, cid: %s, PID: %d, fgProcess: %t", sig, c.ID, pid, fgProcess)
if err := c.Sandbox.SignalProcess(c.ID, pid, syscall.Signal(sig), fgProcess); err != nil {
log.Warningf("error forwarding signal %d to container %q: %v", sig, c.ID, err)
}
})
return func() {
- log.Debugf("Done forwarding signals to container %q PID %d fgProcess=%t", c.ID, pid, fgProcess)
+ log.Debugf("Done forwarding signals to container, cid: %s, PID: %d, fgProcess: %t", c.ID, pid, fgProcess)
stop()
}
}
@@ -653,7 +662,7 @@ func (c *Container) ForwardSignals(pid int32, fgProcess bool) func() {
// Checkpoint sends the checkpoint call to the container.
// The statefile will be written to f, the file at the specified image-path.
func (c *Container) Checkpoint(f *os.File) error {
- log.Debugf("Checkpoint container %q", c.ID)
+ log.Debugf("Checkpoint container, cid: %s", c.ID)
if err := c.requireStatus("checkpoint", Created, Running, Paused); err != nil {
return err
}
@@ -663,7 +672,7 @@ func (c *Container) Checkpoint(f *os.File) error {
// Pause suspends the container and its kernel.
// The call only succeeds if the container's status is created or running.
func (c *Container) Pause() error {
- log.Debugf("Pausing container %q", c.ID)
+ log.Debugf("Pausing container, cid: %s", c.ID)
if err := c.Saver.lock(); err != nil {
return err
}
@@ -674,7 +683,7 @@ func (c *Container) Pause() error {
}
if err := c.Sandbox.Pause(c.ID); err != nil {
- return fmt.Errorf("pausing container: %v", err)
+ return fmt.Errorf("pausing container %q: %v", c.ID, err)
}
c.changeStatus(Paused)
return c.saveLocked()
@@ -683,7 +692,7 @@ func (c *Container) Pause() error {
// Resume unpauses the container and its kernel.
// The call only succeeds if the container's status is paused.
func (c *Container) Resume() error {
- log.Debugf("Resuming container %q", c.ID)
+ log.Debugf("Resuming container, cid: %s", c.ID)
if err := c.Saver.lock(); err != nil {
return err
}
@@ -722,7 +731,7 @@ func (c *Container) Processes() ([]*control.Process, error) {
// Destroy stops all processes and frees all resources associated with the
// container.
func (c *Container) Destroy() error {
- log.Debugf("Destroy container %q", c.ID)
+ log.Debugf("Destroy container, cid: %s", c.ID)
if err := c.Saver.lock(); err != nil {
return err
@@ -759,14 +768,12 @@ func (c *Container) Destroy() error {
c.changeStatus(Stopped)
// Adjust oom_score_adj for the sandbox. This must be done after the container
- // is stopped and the directory at c.Root is removed. Adjustment can be
- // skipped if the root container is exiting, because it brings down the entire
- // sandbox.
+ // is stopped and the directory at c.Root is removed.
//
// Use 'sb' to tell whether it has been executed before because Destroy must
// be idempotent.
- if sb != nil && !isRoot(c.Spec) {
- if err := adjustSandboxOOMScoreAdj(sb, c.Saver.RootDir, true); err != nil {
+ if sb != nil {
+ if err := adjustSandboxOOMScoreAdj(sb, c.Spec, c.Saver.RootDir, true); err != nil {
errs = append(errs, err.Error())
}
}
@@ -795,7 +802,7 @@ func (c *Container) Destroy() error {
//
// Precondition: container must be locked with container.lock().
func (c *Container) saveLocked() error {
- log.Debugf("Save container %q", c.ID)
+ log.Debugf("Save container, cid: %s", c.ID)
if err := c.Saver.saveLocked(c); err != nil {
return fmt.Errorf("saving container metadata: %v", err)
}
@@ -809,7 +816,7 @@ func (c *Container) stop() error {
var cgroup *cgroup.Cgroup
if c.Sandbox != nil {
- log.Debugf("Destroying container %q", c.ID)
+ log.Debugf("Destroying container, cid: %s", c.ID)
if err := c.Sandbox.DestroyContainer(c.ID); err != nil {
return fmt.Errorf("destroying container %q: %v", c.ID, err)
}
@@ -823,7 +830,7 @@ func (c *Container) stop() error {
// Try killing gofer if it does not exit with container.
if c.GoferPid != 0 {
- log.Debugf("Killing gofer for container %q, PID: %d", c.ID, c.GoferPid)
+ log.Debugf("Killing gofer for container, cid: %s, PID: %d", c.ID, c.GoferPid)
if err := syscall.Kill(c.GoferPid, syscall.SIGKILL); err != nil {
// The gofer may already be stopped, log the error.
log.Warningf("Error sending signal %d to gofer %d: %v", syscall.SIGKILL, c.GoferPid, err)
@@ -1096,7 +1103,13 @@ func (c *Container) adjustGoferOOMScoreAdj() error {
// TODO(gvisor.dev/issue/238): This call could race with other containers being
// created at the same time and end up setting the wrong oom_score_adj to the
// sandbox. Use rpc client to synchronize.
-func adjustSandboxOOMScoreAdj(s *sandbox.Sandbox, rootDir string, destroy bool) error {
+func adjustSandboxOOMScoreAdj(s *sandbox.Sandbox, spec *specs.Spec, rootDir string, destroy bool) error {
+ // Adjustment can be skipped if the root container is exiting, because it
+ // brings down the entire sandbox.
+ if isRoot(spec) && destroy {
+ return nil
+ }
+
containers, err := loadSandbox(rootDir, s.ID)
if err != nil {
return fmt.Errorf("loading sandbox containers: %v", err)
@@ -1110,53 +1123,34 @@ func adjustSandboxOOMScoreAdj(s *sandbox.Sandbox, rootDir string, destroy bool)
// Get the lowest score for all containers.
var lowScore int
scoreFound := false
- if len(containers) == 1 && specutils.SpecContainerType(containers[0].Spec) == specutils.ContainerTypeUnspecified {
- // This is a single-container sandbox. Set the oom_score_adj to
- // the value specified in the OCI bundle.
- if containers[0].Spec.Process.OOMScoreAdj != nil {
- scoreFound = true
- lowScore = *containers[0].Spec.Process.OOMScoreAdj
+ for _, container := range containers {
+ // Special multi-container support for CRI. Ignore the root container when
+ // calculating oom_score_adj for the sandbox because it is the
+ // infrastructure (pause) container and always has a very low oom_score_adj.
+ //
+ // We will use OOMScoreAdj in the single-container case where the
+ // containerd container-type annotation is not present.
+ if specutils.SpecContainerType(container.Spec) == specutils.ContainerTypeSandbox {
+ continue
}
- } else {
- for _, container := range containers {
- // Special multi-container support for CRI. Ignore the root
- // container when calculating oom_score_adj for the sandbox because
- // it is the infrastructure (pause) container and always has a very
- // low oom_score_adj.
- //
- // We will use OOMScoreAdj in the single-container case where the
- // containerd container-type annotation is not present.
- if specutils.SpecContainerType(container.Spec) == specutils.ContainerTypeSandbox {
- continue
- }
- if container.Spec.Process.OOMScoreAdj != nil && (!scoreFound || *container.Spec.Process.OOMScoreAdj < lowScore) {
- scoreFound = true
- lowScore = *container.Spec.Process.OOMScoreAdj
- }
+ if container.Spec.Process.OOMScoreAdj != nil && (!scoreFound || *container.Spec.Process.OOMScoreAdj < lowScore) {
+ scoreFound = true
+ lowScore = *container.Spec.Process.OOMScoreAdj
}
}
// If the container is destroyed and remaining containers have no
- // oomScoreAdj specified then we must revert to the oom_score_adj of the
- // parent process.
+ // oomScoreAdj specified then we must revert to the original oom_score_adj
+ // saved with the root container.
if !scoreFound && destroy {
- ppid, err := specutils.GetParentPid(s.Pid)
- if err != nil {
- return fmt.Errorf("getting parent pid of sandbox pid %d: %v", s.Pid, err)
- }
- pScore, err := specutils.GetOOMScoreAdj(ppid)
- if err != nil {
- return fmt.Errorf("getting oom_score_adj of parent %d: %v", ppid, err)
- }
-
+ lowScore = containers[0].Sandbox.OriginalOOMScoreAdj
scoreFound = true
- lowScore = pScore
}
- // Only set oom_score_adj if one of the containers has oom_score_adj set
- // in the OCI bundle. If not, we need to inherit the parent process's
- // oom_score_adj.
+ // Only set oom_score_adj if one of the containers has oom_score_adj set. If
+ // not, oom_score_adj is inherited from the parent process.
+ //
// See: https://github.com/opencontainers/runtime-spec/blob/master/config.md#linux-process
if !scoreFound {
return nil
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 14:35:35 +0000