Remove execution/executors
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
This commit is contained in:
Kenfe-Mickael Laventure
parent
6f9eda1134
commit
8fbdf1c0d7
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@ -1,429 +0,0 @@
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package shim
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import (
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"context"
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"encoding/json"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"sync"
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"syscall"
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"github.com/Sirupsen/logrus"
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"github.com/docker/containerd/execution"
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"github.com/docker/containerd/log"
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"github.com/pkg/errors"
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"golang.org/x/sys/unix"
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runc "github.com/crosbymichael/go-runc"
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starttime "github.com/opencontainers/runc/libcontainer/system"
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)
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type newProcessOpts struct {
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shimBinary string
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runtime string
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runtimeArgs []string
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container *execution.Container
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exec bool
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stateDir string
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execution.StartProcessOpts
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}
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func validateNewProcessOpts(o newProcessOpts) error {
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if o.shimBinary == "" {
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return errors.New("shim binary not specified")
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}
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if o.runtime == "" {
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return errors.New("runtime not specified")
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}
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if o.container == nil {
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return errors.New("container not specified")
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}
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if o.container.ID() == "" {
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return errors.New("container id not specified")
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}
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if o.container.Bundle() == "" {
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return errors.New("bundle not specified")
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}
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if o.stateDir == "" {
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return errors.New("state dir not specified")
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}
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return nil
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}
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func newProcess(ctx context.Context, o newProcessOpts) (p *process, err error) {
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if err = validateNewProcessOpts(o); err != nil {
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return
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}
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p = &process{
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id: o.ID,
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stateDir: o.stateDir,
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exitChan: make(chan struct{}),
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ctx: ctx,
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}
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defer func() {
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if err != nil {
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p.cleanup()
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p = nil
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}
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}()
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if err = os.Mkdir(o.stateDir, 0700); err != nil {
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err = errors.Wrap(err, "failed to create process state dir")
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return
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}
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p.exitPipe, p.controlPipe, err = getControlPipes(o.stateDir)
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if err != nil {
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return
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}
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cmd, err := newShimProcess(o)
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if err != nil {
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return
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}
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defer func() {
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if err != nil {
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cmd.Process.Kill()
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cmd.Wait()
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}
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}()
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abortCh := make(chan syscall.WaitStatus, 1)
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go func() {
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var shimStatus syscall.WaitStatus
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if err := cmd.Wait(); err != nil {
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shimStatus = execution.UnknownStatusCode
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} else {
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shimStatus = cmd.ProcessState.Sys().(syscall.WaitStatus)
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}
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abortCh <- shimStatus
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close(abortCh)
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}()
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p.pid, p.startTime, p.status, err = waitUntilReady(ctx, abortCh, o.stateDir)
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if err != nil {
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return
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}
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return
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}
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func loadProcess(ctx context.Context, stateDir, id string) (p *process, err error) {
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p = &process{
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id: id,
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stateDir: stateDir,
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exitChan: make(chan struct{}),
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status: execution.Running,
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ctx: ctx,
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}
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defer func() {
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if err != nil {
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p.cleanup()
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p = nil
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}
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}()
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p.pid, err = getPidFromFile(filepath.Join(stateDir, pidFilename))
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if err != nil {
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err = errors.Wrap(err, "failed to read pid")
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return
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}
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p.startTime, err = getStartTimeFromFile(filepath.Join(stateDir, startTimeFilename))
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if err != nil {
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return
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}
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path := filepath.Join(stateDir, exitPipeFilename)
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p.exitPipe, err = os.OpenFile(path, syscall.O_RDONLY|syscall.O_NONBLOCK, 0)
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if err != nil {
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err = errors.Wrapf(err, "failed to open exit pipe")
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return
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}
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path = filepath.Join(stateDir, controlPipeFilename)
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p.controlPipe, err = os.OpenFile(path, syscall.O_RDWR|syscall.O_NONBLOCK, 0)
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if err != nil {
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err = errors.Wrapf(err, "failed to open control pipe")
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return
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}
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markAsStopped := func(p *process) (*process, error) {
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p.setStatus(execution.Stopped)
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return p, nil
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}
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if err = syscall.Kill(int(p.pid), 0); err != nil {
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if err == syscall.ESRCH {
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return markAsStopped(p)
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}
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err = errors.Wrapf(err, "failed to check if process is still alive")
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return
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}
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cstime, err := starttime.GetProcessStartTime(int(p.pid))
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if err != nil {
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if os.IsNotExist(err) {
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return markAsStopped(p)
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}
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err = errors.Wrapf(err, "failed retrieve current process start time")
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return
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}
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if p.startTime != cstime {
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return markAsStopped(p)
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}
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return
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}
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type process struct {
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stateDir string
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id string
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pid int64
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exitChan chan struct{}
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exitPipe *os.File
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controlPipe *os.File
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startTime string
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status execution.Status
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ctx context.Context
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mu sync.Mutex
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}
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func (p *process) ID() string {
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return p.id
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}
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func (p *process) Pid() int64 {
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return p.pid
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}
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func (p *process) Wait() (uint32, error) {
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<-p.exitChan
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log.G(p.ctx).WithFields(logrus.Fields{"process-id": p.ID(), "pid": p.pid}).
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Debugf("wait is over")
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// Cleanup those fds
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p.exitPipe.Close()
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p.controlPipe.Close()
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// If the container process is still alive, it means the shim crashed
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// and the child process had updated it PDEATHSIG to something
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// else than SIGKILL. Or that epollCtl failed
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if p.isAlive() {
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err := syscall.Kill(int(p.pid), syscall.SIGKILL)
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if err != nil {
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return execution.UnknownStatusCode, errors.Wrap(err, "failed to kill process")
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}
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return uint32(128 + int(syscall.SIGKILL)), nil
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}
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data, err := ioutil.ReadFile(filepath.Join(p.stateDir, exitStatusFilename))
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if err != nil {
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return execution.UnknownStatusCode, errors.Wrap(err, "failed to read process exit status")
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}
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if len(data) == 0 {
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return execution.UnknownStatusCode, errors.New(execution.ErrProcessNotExited.Error())
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}
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status, err := strconv.Atoi(string(data))
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if err != nil {
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return execution.UnknownStatusCode, errors.Wrapf(err, "failed to parse exit status")
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}
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p.setStatus(execution.Stopped)
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return uint32(status), nil
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}
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func (p *process) Signal(sig os.Signal) error {
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err := syscall.Kill(int(p.pid), sig.(syscall.Signal))
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if err != nil {
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return errors.Wrap(err, "failed to signal process")
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}
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return nil
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}
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func (p *process) Status() execution.Status {
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p.mu.Lock()
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s := p.status
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p.mu.Unlock()
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return s
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}
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func (p *process) setStatus(s execution.Status) {
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p.mu.Lock()
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p.status = s
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p.mu.Unlock()
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}
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func (p *process) isAlive() bool {
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if err := syscall.Kill(int(p.pid), 0); err != nil {
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if err == syscall.ESRCH {
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return false
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}
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log.G(p.ctx).WithFields(logrus.Fields{"process-id": p.ID(), "pid": p.pid}).
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Warnf("kill(0) failed: %v", err)
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return false
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}
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// check that we have the same starttime
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stime, err := starttime.GetProcessStartTime(int(p.pid))
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if err != nil {
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if os.IsNotExist(err) {
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return false
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}
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log.G(p.ctx).WithFields(logrus.Fields{"process-id": p.ID(), "pid": p.pid}).
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Warnf("failed to get process start time: %v", err)
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return false
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}
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if p.startTime != stime {
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return false
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}
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return true
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}
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func (p *process) cleanup() {
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for _, f := range []*os.File{p.exitPipe, p.controlPipe} {
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if f != nil {
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f.Close()
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}
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}
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if err := os.RemoveAll(p.stateDir); err != nil {
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log.G(p.ctx).Warnf("failed to remove process state dir: %v", err)
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}
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}
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func waitUntilReady(ctx context.Context, abortCh chan syscall.WaitStatus, root string) (pid int64, stime string, status execution.Status, err error) {
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status = execution.Unknown
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for {
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select {
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case <-ctx.Done():
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return
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case wait := <-abortCh:
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if wait.Signaled() {
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err = errors.Errorf("shim died prematurely: %v", wait.Signal())
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return
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}
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err = errors.Errorf("shim exited prematurely with exit code %v", wait.ExitStatus())
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return
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default:
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}
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pid, err = getPidFromFile(filepath.Join(root, pidFilename))
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if err == nil {
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break
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} else if !os.IsNotExist(err) {
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return
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}
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}
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status = execution.Created
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stime, err = starttime.GetProcessStartTime(int(pid))
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switch {
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case os.IsNotExist(err):
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status = execution.Stopped
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case err != nil:
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return
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default:
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var b []byte
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path := filepath.Join(root, startTimeFilename)
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b, err = ioutil.ReadFile(path)
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switch {
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case os.IsNotExist(err):
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err = ioutil.WriteFile(path, []byte(stime), 0600)
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if err != nil {
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return
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}
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case err != nil:
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err = errors.Wrapf(err, "failed to get start time for pid %d", pid)
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return
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case string(b) != stime:
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status = execution.Stopped
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}
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}
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return pid, stime, status, nil
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}
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func newShimProcess(o newProcessOpts) (*exec.Cmd, error) {
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cmd := exec.Command(o.shimBinary, o.container.ID(), o.container.Bundle(), o.runtime)
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cmd.Dir = o.stateDir
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cmd.SysProcAttr = &syscall.SysProcAttr{
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Setpgid: true,
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}
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state := processState{
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Process: o.Spec,
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Exec: o.exec,
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Stdin: o.Stdin,
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Stdout: o.Stdout,
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Stderr: o.Stderr,
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RuntimeArgs: o.runtimeArgs,
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NoPivotRoot: false,
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CheckpointPath: "",
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RootUID: int(o.Spec.User.UID),
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RootGID: int(o.Spec.User.GID),
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}
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f, err := os.Create(filepath.Join(o.stateDir, "process.json"))
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create shim's process.json for container %s", o.container.ID())
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}
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defer f.Close()
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if err := json.NewEncoder(f).Encode(state); err != nil {
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return nil, errors.Wrapf(err, "failed to create shim's processState for container %s", o.container.ID())
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}
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if err := cmd.Start(); err != nil {
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return nil, errors.Wrapf(err, "failed to start shim for container %s", o.container.ID())
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}
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return cmd, nil
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}
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func getControlPipes(root string) (exitPipe *os.File, controlPipe *os.File, err error) {
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path := filepath.Join(root, exitPipeFilename)
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if err = unix.Mkfifo(path, 0700); err != nil {
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err = errors.Wrap(err, "failed to create shim exit fifo")
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return
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}
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if exitPipe, err = os.OpenFile(path, syscall.O_RDONLY|syscall.O_NONBLOCK, 0); err != nil {
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err = errors.Wrap(err, "failed to open shim exit fifo")
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return
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}
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path = filepath.Join(root, controlPipeFilename)
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if err = unix.Mkfifo(path, 0700); err != nil {
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err = errors.Wrap(err, "failed to create shim control fifo")
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return
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}
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if controlPipe, err = os.OpenFile(path, syscall.O_RDWR|syscall.O_NONBLOCK, 0); err != nil {
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err = errors.Wrap(err, "failed to open shim control fifo")
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return
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}
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return
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}
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func getPidFromFile(path string) (int64, error) {
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pid, err := runc.ReadPidFile(path)
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if err != nil {
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return -1, err
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}
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return int64(pid), nil
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}
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func getStartTimeFromFile(path string) (string, error) {
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stime, err := ioutil.ReadFile(path)
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if err != nil {
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return "", errors.Wrapf(err, "failed to read start time")
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}
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return string(stime), nil
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}
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@ -1,431 +0,0 @@
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package shim
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import (
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"bytes"
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"context"
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"encoding/json"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"sync"
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"syscall"
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"github.com/Sirupsen/logrus"
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"github.com/docker/containerd/execution"
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"github.com/docker/containerd/log"
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"github.com/opencontainers/runtime-spec/specs-go"
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"github.com/pkg/errors"
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)
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const (
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DefaultShimBinary = "containerd-shim"
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pidFilename = "pid"
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startTimeFilename = "starttime"
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exitPipeFilename = "exit"
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controlPipeFilename = "control"
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exitStatusFilename = "exitStatus"
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)
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func New(ctx context.Context, root, shim, runtime string, runtimeArgs []string) (*ShimRuntime, error) {
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fd, err := syscall.EpollCreate1(0)
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if err != nil {
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return nil, errors.Wrap(err, "epollcreate1 failed")
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}
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s := &ShimRuntime{
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ctx: ctx,
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epollFd: fd,
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root: root,
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binaryName: shim,
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runtime: runtime,
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runtimeArgs: runtimeArgs,
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exitChannels: make(map[int]*process),
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containers: make(map[string]*execution.Container),
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}
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s.loadContainers()
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go s.monitor()
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return s, nil
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}
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type ShimRuntime struct {
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ctx context.Context
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mutex sync.Mutex
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exitChannels map[int]*process
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containers map[string]*execution.Container
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epollFd int
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root string
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binaryName string
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runtime string
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runtimeArgs []string
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}
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type ProcessOpts struct {
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Bundle string
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Terminal bool
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Stdin string
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Stdout string
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Stderr string
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}
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type processState struct {
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specs.Process
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Exec bool `json:"exec"`
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Stdin string `json:"containerdStdin"`
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Stdout string `json:"containerdStdout"`
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Stderr string `json:"containerdStderr"`
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RuntimeArgs []string `json:"runtimeArgs"`
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NoPivotRoot bool `json:"noPivotRoot"`
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CheckpointPath string `json:"checkpoint"`
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RootUID int `json:"rootUID"`
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RootGID int `json:"rootGID"`
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}
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func (s *ShimRuntime) Create(ctx context.Context, id string, o execution.CreateOpts) (*execution.Container, error) {
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log.G(s.ctx).WithFields(logrus.Fields{"container-id": id, "options": o}).Debug("Create()")
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if s.getContainer(id) != nil {
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return nil, execution.ErrContainerExists
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}
|
||||
|
||||
containerCtx := log.WithModule(log.WithModule(ctx, "container"), id)
|
||||
container, err := execution.NewContainer(containerCtx, filepath.Join(s.root, id), id, o.Bundle)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer func() {
|
||||
if err != nil {
|
||||
container.Cleanup()
|
||||
}
|
||||
}()
|
||||
|
||||
// extract Process spec from bundle's config.json
|
||||
var spec specs.Spec
|
||||
f, err := os.Open(filepath.Join(o.Bundle, "config.json"))
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "failed to open config.json")
|
||||
}
|
||||
defer f.Close()
|
||||
if err := json.NewDecoder(f).Decode(&spec); err != nil {
|
||||
return nil, errors.Wrap(err, "failed to decode container OCI specs")
|
||||
}
|
||||
|
||||
processOpts := newProcessOpts{
|
||||
shimBinary: s.binaryName,
|
||||
runtime: s.runtime,
|
||||
runtimeArgs: s.runtimeArgs,
|
||||
container: container,
|
||||
exec: false,
|
||||
stateDir: container.ProcessStateDir(execution.InitProcessID),
|
||||
StartProcessOpts: execution.StartProcessOpts{
|
||||
ID: execution.InitProcessID,
|
||||
Spec: spec.Process,
|
||||
Console: o.Console,
|
||||
Stdin: o.Stdin,
|
||||
Stdout: o.Stdout,
|
||||
Stderr: o.Stderr,
|
||||
},
|
||||
}
|
||||
|
||||
processCtx := log.WithModule(log.WithModule(containerCtx, "process"), execution.InitProcessID)
|
||||
process, err := newProcess(processCtx, processOpts)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
s.monitorProcess(process)
|
||||
container.AddProcess(process)
|
||||
|
||||
s.addContainer(container)
|
||||
|
||||
return container, nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) Start(ctx context.Context, c *execution.Container) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c}).Debug("Start()")
|
||||
|
||||
cmd := exec.CommandContext(ctx, s.runtime, append(s.runtimeArgs, "start", c.ID())...)
|
||||
out, err := cmd.CombinedOutput()
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "'%s start' failed with output: %v", s.runtime, string(out))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) List(ctx context.Context) ([]*execution.Container, error) {
|
||||
log.G(s.ctx).Debug("List()")
|
||||
|
||||
containers := make([]*execution.Container, 0)
|
||||
s.mutex.Lock()
|
||||
for _, c := range s.containers {
|
||||
containers = append(containers, c)
|
||||
}
|
||||
s.mutex.Unlock()
|
||||
|
||||
return containers, nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) Load(ctx context.Context, id string) (*execution.Container, error) {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container-id": id}).Debug("Start()")
|
||||
|
||||
s.mutex.Lock()
|
||||
c, ok := s.containers[id]
|
||||
s.mutex.Unlock()
|
||||
|
||||
if !ok {
|
||||
return nil, errors.New(execution.ErrContainerNotFound.Error())
|
||||
}
|
||||
|
||||
return c, nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) Delete(ctx context.Context, c *execution.Container) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c}).Debug("Delete()")
|
||||
|
||||
if c.Status() != execution.Stopped {
|
||||
return errors.Errorf("cannot delete a container in the '%s' state", c.Status())
|
||||
}
|
||||
|
||||
c.Cleanup()
|
||||
s.removeContainer(c)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) Pause(ctx context.Context, c *execution.Container) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c}).Debug("Pause()")
|
||||
|
||||
cmd := exec.CommandContext(ctx, s.runtime, append(s.runtimeArgs, "pause", c.ID())...)
|
||||
out, err := cmd.CombinedOutput()
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "'%s pause' failed with output: %v", s.runtime, string(out))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) Resume(ctx context.Context, c *execution.Container) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c}).Debug("Resume()")
|
||||
|
||||
cmd := exec.CommandContext(ctx, s.runtime, append(s.runtimeArgs, "resume", c.ID())...)
|
||||
out, err := cmd.CombinedOutput()
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "'%s resume' failed with output: %v", s.runtime, string(out))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) StartProcess(ctx context.Context, c *execution.Container, o execution.StartProcessOpts) (p execution.Process, err error) {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c, "options": o}).Debug("StartProcess()")
|
||||
|
||||
processOpts := newProcessOpts{
|
||||
shimBinary: s.binaryName,
|
||||
runtime: s.runtime,
|
||||
runtimeArgs: s.runtimeArgs,
|
||||
container: c,
|
||||
exec: true,
|
||||
stateDir: c.ProcessStateDir(o.ID),
|
||||
StartProcessOpts: o,
|
||||
}
|
||||
|
||||
processCtx := log.WithModule(log.WithModule(c.Context(), "process"), execution.InitProcessID)
|
||||
process, err := newProcess(processCtx, processOpts)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
process.status = execution.Running
|
||||
s.monitorProcess(process)
|
||||
|
||||
c.AddProcess(process)
|
||||
return process, nil
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) SignalProcess(ctx context.Context, c *execution.Container, id string, sig os.Signal) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c, "process-id": id, "signal": sig}).
|
||||
Debug("SignalProcess()")
|
||||
|
||||
process := c.GetProcess(id)
|
||||
if process == nil {
|
||||
return errors.Errorf("container %s has no process named %s", c.ID(), id)
|
||||
}
|
||||
err := syscall.Kill(int(process.Pid()), sig.(syscall.Signal))
|
||||
if err != nil {
|
||||
return errors.Wrapf(err, "failed to send %v signal to container %s process %v", sig, c.ID(), process.Pid())
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) DeleteProcess(ctx context.Context, c *execution.Container, id string) error {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container": c, "process-id": id}).
|
||||
Debug("DeleteProcess()")
|
||||
|
||||
if p := c.GetProcess(id); p != nil {
|
||||
p.(*process).cleanup()
|
||||
|
||||
return c.RemoveProcess(id)
|
||||
}
|
||||
|
||||
return errors.Errorf("container %s has no process named %s", c.ID(), id)
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) monitor() {
|
||||
var events [128]syscall.EpollEvent
|
||||
for {
|
||||
n, err := syscall.EpollWait(s.epollFd, events[:], -1)
|
||||
if err != nil {
|
||||
if err == syscall.EINTR {
|
||||
continue
|
||||
}
|
||||
log.G(s.ctx).Error("epollwait failed:", err)
|
||||
}
|
||||
|
||||
for i := 0; i < n; i++ {
|
||||
fd := int(events[i].Fd)
|
||||
|
||||
s.mutex.Lock()
|
||||
p := s.exitChannels[fd]
|
||||
delete(s.exitChannels, fd)
|
||||
s.mutex.Unlock()
|
||||
|
||||
if err = syscall.EpollCtl(s.epollFd, syscall.EPOLL_CTL_DEL, fd, &syscall.EpollEvent{
|
||||
Events: syscall.EPOLLHUP,
|
||||
Fd: int32(fd),
|
||||
}); err != nil {
|
||||
log.G(s.ctx).Error("epollctl deletion failed:", err)
|
||||
}
|
||||
|
||||
close(p.exitChan)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) addContainer(c *execution.Container) {
|
||||
s.mutex.Lock()
|
||||
s.containers[c.ID()] = c
|
||||
s.mutex.Unlock()
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) removeContainer(c *execution.Container) {
|
||||
s.mutex.Lock()
|
||||
delete(s.containers, c.ID())
|
||||
s.mutex.Unlock()
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) getContainer(id string) *execution.Container {
|
||||
s.mutex.Lock()
|
||||
c := s.containers[id]
|
||||
s.mutex.Unlock()
|
||||
|
||||
return c
|
||||
}
|
||||
|
||||
// monitorProcess adds a process to the list of monitored process if
|
||||
// we fail to do so, we closed the exitChan channel used by Wait().
|
||||
// Since service always call on Wait() for generating "exit" events,
|
||||
// this will ensure the process gets killed
|
||||
func (s *ShimRuntime) monitorProcess(p *process) {
|
||||
if p.status == execution.Stopped {
|
||||
close(p.exitChan)
|
||||
return
|
||||
}
|
||||
|
||||
fd := int(p.exitPipe.Fd())
|
||||
event := syscall.EpollEvent{
|
||||
Fd: int32(fd),
|
||||
Events: syscall.EPOLLHUP,
|
||||
}
|
||||
s.mutex.Lock()
|
||||
s.exitChannels[fd] = p
|
||||
s.mutex.Unlock()
|
||||
if err := syscall.EpollCtl(s.epollFd, syscall.EPOLL_CTL_ADD, fd, &event); err != nil {
|
||||
s.mutex.Lock()
|
||||
delete(s.exitChannels, fd)
|
||||
s.mutex.Unlock()
|
||||
close(p.exitChan)
|
||||
return
|
||||
}
|
||||
|
||||
// TODO: take care of the OOM handler
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) unmonitorProcess(p *process) {
|
||||
s.mutex.Lock()
|
||||
for fd, proc := range s.exitChannels {
|
||||
if proc == p {
|
||||
delete(s.exitChannels, fd)
|
||||
break
|
||||
}
|
||||
}
|
||||
s.mutex.Unlock()
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) loadContainers() {
|
||||
cs, err := ioutil.ReadDir(s.root)
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithField("statedir", s.root).
|
||||
Warn("failed to load containers, state dir cannot be listed:", err)
|
||||
return
|
||||
}
|
||||
|
||||
for _, c := range cs {
|
||||
if !c.IsDir() {
|
||||
continue
|
||||
}
|
||||
|
||||
stateDir := filepath.Join(s.root, c.Name())
|
||||
containerCtx := log.WithModule(log.WithModule(s.ctx, "container"), c.Name())
|
||||
container, err := execution.LoadContainer(containerCtx, stateDir, c.Name())
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithField("container-id", c.Name()).Warn(err)
|
||||
continue
|
||||
}
|
||||
|
||||
processDirs, err := container.ProcessesStateDir()
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithField("container-id", c.Name()).Warn(err)
|
||||
continue
|
||||
}
|
||||
|
||||
for processID, processStateDir := range processDirs {
|
||||
processCtx := log.WithModule(log.WithModule(containerCtx, "process"), processID)
|
||||
var p *process
|
||||
p, err = loadProcess(processCtx, processStateDir, processID)
|
||||
if err != nil {
|
||||
log.G(s.ctx).WithFields(logrus.Fields{"container-id": c.Name(), "process": processID}).Warn(err)
|
||||
break
|
||||
}
|
||||
if processID == execution.InitProcessID && p.status == execution.Running {
|
||||
p.status = s.loadContainerStatus(container.ID())
|
||||
}
|
||||
container.AddProcess(p)
|
||||
}
|
||||
|
||||
// if successfull, add the container to our list
|
||||
if err == nil {
|
||||
for _, p := range container.Processes() {
|
||||
s.monitorProcess(p.(*process))
|
||||
}
|
||||
s.addContainer(container)
|
||||
log.G(s.ctx).Infof("restored container %s", container.ID())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *ShimRuntime) loadContainerStatus(id string) execution.Status {
|
||||
cmd := exec.Command(s.runtime, append(s.runtimeArgs, "state", id)...)
|
||||
out, err := cmd.CombinedOutput()
|
||||
if err != nil {
|
||||
return execution.Unknown
|
||||
}
|
||||
|
||||
var st struct{ Status string }
|
||||
if err := json.NewDecoder(bytes.NewReader(out)).Decode(&st); err != nil {
|
||||
return execution.Unknown
|
||||
}
|
||||
|
||||
return execution.Status(st.Status)
|
||||
}
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
package execution
|
||||
|
||||
type Supervisor struct {
|
||||
}
|
||||
|
||||
type waiter interface {
|
||||
Wait() (uint32, error)
|
||||
}
|
||||
|
||||
func (s *Supervisor) Monitor(w waiter, cb func(uint32, error)) {
|
||||
go cb(w.Wait())
|
||||
}
|
||||
Loading…
Reference in New Issue