package daemon import ( "errors" "fmt" "io" "runtime" "strconv" "github.com/Sirupsen/logrus" "github.com/docker/docker/daemon/exec" "github.com/docker/docker/libcontainerd" "github.com/docker/docker/runconfig" "github.com/docker/engine-api/types" ) // StateChanged updates daemon state changes from containerd func (daemon *Daemon) StateChanged(id string, e libcontainerd.StateInfo) error { c := daemon.containers.Get(id) if c == nil { return fmt.Errorf("no such container: %s", id) } switch e.State { case libcontainerd.StateOOM: // StateOOM is Linux specific and should never be hit on Windows if runtime.GOOS == "windows" { return errors.New("Received StateOOM from libcontainerd on Windows. This should never happen.") } daemon.updateHealthMonitor(c) daemon.LogContainerEvent(c, "oom") case libcontainerd.StateExit: // if containers AutoRemove flag is set, remove it after clean up if c.HostConfig.AutoRemove { defer func() { if err := daemon.ContainerRm(c.ID, &types.ContainerRmConfig{ForceRemove: true, RemoveVolume: true}); err != nil { logrus.Errorf("can't remove container %s: %v", c.ID, err) } }() } c.Lock() defer c.Unlock() c.Wait() c.Reset(false) c.SetStopped(platformConstructExitStatus(e)) attributes := map[string]string{ "exitCode": strconv.Itoa(int(e.ExitCode)), } daemon.updateHealthMonitor(c) daemon.LogContainerEventWithAttributes(c, "die", attributes) daemon.Cleanup(c) // FIXME: here is race condition between two RUN instructions in Dockerfile // because they share same runconfig and change image. Must be fixed // in builder/builder.go if err := c.ToDisk(); err != nil { return err } return daemon.postRunProcessing(c, e) case libcontainerd.StateRestart: c.Lock() defer c.Unlock() c.Reset(false) c.RestartCount++ c.SetRestarting(platformConstructExitStatus(e)) attributes := map[string]string{ "exitCode": strconv.Itoa(int(e.ExitCode)), } daemon.LogContainerEventWithAttributes(c, "die", attributes) daemon.updateHealthMonitor(c) return c.ToDisk() case libcontainerd.StateExitProcess: c.Lock() defer c.Unlock() if execConfig := c.ExecCommands.Get(e.ProcessID); execConfig != nil { ec := int(e.ExitCode) execConfig.ExitCode = &ec execConfig.Running = false execConfig.Wait() if err := execConfig.CloseStreams(); err != nil { logrus.Errorf("%s: %s", c.ID, err) } // remove the exec command from the container's store only and not the // daemon's store so that the exec command can be inspected. c.ExecCommands.Delete(execConfig.ID) } else { logrus.Warnf("Ignoring StateExitProcess for %v but no exec command found", e) } case libcontainerd.StateStart, libcontainerd.StateRestore: // Container is already locked in this case c.SetRunning(int(e.Pid), e.State == libcontainerd.StateStart) c.HasBeenManuallyStopped = false if err := c.ToDisk(); err != nil { c.Reset(false) return err } daemon.initHealthMonitor(c) daemon.LogContainerEvent(c, "start") case libcontainerd.StatePause: // Container is already locked in this case c.Paused = true if err := c.ToDisk(); err != nil { return err } daemon.updateHealthMonitor(c) daemon.LogContainerEvent(c, "pause") case libcontainerd.StateResume: // Container is already locked in this case c.Paused = false if err := c.ToDisk(); err != nil { return err } daemon.updateHealthMonitor(c) daemon.LogContainerEvent(c, "unpause") } return nil } // AttachStreams is called by libcontainerd to connect the stdio. func (daemon *Daemon) AttachStreams(id string, iop libcontainerd.IOPipe) error { var ( s *runconfig.StreamConfig ec *exec.Config ) c := daemon.containers.Get(id) if c == nil { var err error ec, err = daemon.getExecConfig(id) if err != nil { return fmt.Errorf("no such exec/container: %s", id) } s = ec.StreamConfig } else { s = c.StreamConfig if err := daemon.StartLogging(c); err != nil { c.Reset(false) return err } } copyFunc := func(w io.Writer, r io.Reader) { s.Add(1) go func() { if _, err := io.Copy(w, r); err != nil { logrus.Errorf("%v stream copy error: %v", id, err) } s.Done() }() } if iop.Stdout != nil { copyFunc(s.Stdout(), iop.Stdout) } if iop.Stderr != nil { copyFunc(s.Stderr(), iop.Stderr) } if stdin := s.Stdin(); stdin != nil { if iop.Stdin != nil { go func() { io.Copy(iop.Stdin, stdin) iop.Stdin.Close() }() } } else { //TODO(swernli): On Windows, not closing stdin when no tty is requested by the exec Config // results in a hang. We should re-evaluate generalizing this fix for all OSes if // we can determine that is the right thing to do more generally. if (c != nil && !c.Config.Tty) || (ec != nil && !ec.Tty && runtime.GOOS == "windows") { // tty is enabled, so dont close containerd's iopipe stdin. if iop.Stdin != nil { iop.Stdin.Close() } } } return nil }