Esempio n. 1
0
// register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) register(container *Container, updateSuffixarray bool) error {
	if container.daemon != nil || daemon.Exists(container.ID) {
		return fmt.Errorf("Container is already loaded")
	}
	if err := validateID(container.ID); err != nil {
		return err
	}
	if err := daemon.ensureName(container); err != nil {
		return err
	}

	container.daemon = daemon

	// Attach to stdout and stderr
	container.stderr = broadcastwriter.New()
	container.stdout = broadcastwriter.New()
	// Attach to stdin
	if container.Config.OpenStdin {
		container.stdin, container.stdinPipe = io.Pipe()
	} else {
		container.stdinPipe = ioutils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
	}
	// done
	daemon.containers.Add(container.ID, container)

	// don't update the Suffixarray if we're starting up
	// we'll waste time if we update it for every container
	daemon.idIndex.Add(container.ID)

	// FIXME: if the container is supposed to be running but is not, auto restart it?
	//        if so, then we need to restart monitor and init a new lock
	// If the container is supposed to be running, make sure of it
	if container.IsRunning() {
		log.Debugf("killing old running container %s", container.ID)

		existingPid := container.Pid
		container.SetStopped(&execdriver.ExitStatus{ExitCode: 0})

		// We only have to handle this for lxc because the other drivers will ensure that
		// no processes are left when docker dies
		if container.ExecDriver == "" || strings.Contains(container.ExecDriver, "lxc") {
			lxc.KillLxc(container.ID, 9)
		} else {
			// use the current driver and ensure that the container is dead x.x
			cmd := &execdriver.Command{
				ID: container.ID,
			}
			var err error
			cmd.ProcessConfig.Process, err = os.FindProcess(existingPid)
			if err != nil {
				log.Debugf("cannot find existing process for %d", existingPid)
			}
			daemon.execDriver.Terminate(cmd)
		}

		if err := container.Unmount(); err != nil {
			log.Debugf("unmount error %s", err)
		}
		if err := container.ToDisk(); err != nil {
			log.Debugf("saving stopped state to disk %s", err)
		}

		info := daemon.execDriver.Info(container.ID)
		if !info.IsRunning() {
			log.Debugf("Container %s was supposed to be running but is not.", container.ID)

			log.Debugf("Marking as stopped")

			container.SetStopped(&execdriver.ExitStatus{ExitCode: -127})
			if err := container.ToDisk(); err != nil {
				return err
			}
		}
	}
	return nil
}
Esempio n. 2
0
// register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) register(container *Container, updateSuffixarray bool) error {
	if container.daemon != nil || daemon.Exists(container.ID) {
		return fmt.Errorf("Container is already loaded")
	}
	if err := validateID(container.ID); err != nil {
		return err
	}
	if err := daemon.ensureName(container); err != nil {
		return err
	}

	container.daemon = daemon

	// Attach to stdout and stderr
	container.stderr = broadcastwriter.New()
	container.stdout = broadcastwriter.New()
	// Attach to stdin
	if container.Config.OpenStdin {
		container.stdin, container.stdinPipe = io.Pipe()
	} else {
		container.stdinPipe = ioutils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
	}
	// done
	daemon.containers.Add(container.ID, container)

	// don't update the Suffixarray if we're starting up
	// we'll waste time if we update it for every container
	daemon.idIndex.Add(container.ID)

	// FIXME: if the container is supposed to be running but is not, auto restart it?
	//        if so, then we need to restart monitor and init a new lock
	// If the container is supposed to be running, make sure of it
	if container.IsRunning() {
		if container.MonitorDriver == MonitorBuiltin {
			log.Debugf("killing old running container %s", container.ID)

			existingPid := container.Pid
			container.SetStopped(0)

			// We only have to handle this for lxc because the other drivers will ensure that
			// no processes are left when docker dies
			if container.ExecDriver == "" || strings.Contains(container.ExecDriver, "lxc") {
				lxc.KillLxc(container.ID, 9)
			} else {
				// use the current driver and ensure that the container is dead x.x
				cmd := &execdriver.Command{
					ID: container.ID,
				}
				var err error
				cmd.ProcessConfig.Process, err = os.FindProcess(existingPid)
				if err != nil {
					log.Debugf("cannot find existing process for %d", existingPid)
				}
				daemon.execDriver.Terminate(cmd)
			}

			if err := container.Unmount(); err != nil {
				log.Debugf("unmount error %s", err)
			}
			if err := container.ToDisk(); err != nil {
				log.Debugf("saving stopped state to disk %s", err)
			}

			info := daemon.execDriver.Info(container.ID)
			if !info.IsRunning() {
				log.Debugf("Container %s was supposed to be running but is not.", container.ID)

				log.Debugf("Marking as stopped")

				container.SetStopped(-127)
				if err := container.ToDisk(); err != nil {
					return err
				}
			}
		} else {
			// restore external container
			log.Debugf("restore external container: %s", container.ID)
			_, err := container.daemon.callMonitorAPI(container, "GET", "_ping")
			if err != nil {
				log.Errorf("Call monitor _ping API failed: %v, mark container %s stopped", err, container.ID)

				// Think monitor is down, mark container is down
				container.SetStopped(-125)
				if err := container.ToDisk(); err != nil {
					return err
				}
			} else {
				obj, err := container.daemon.callMonitorAPI(container, "GET", "state")
				if err != nil {
					log.Errorf("Call monitor state API failed: %v", err)
					return err
				}

				m := make(map[string]*WatchState)
				if err = json.Unmarshal(obj, &m); err != nil {
					log.Errorf("Decode WatchState error: %v", err)
					return err
				}
				ws := m["WatchState"]
				log.Debugf("WatchState %v", ws)

				if !ws.Running {
					log.Errorf("Container %s is supposed be running, but not running in monitor, mark it stopped", container.ID)
					container.SetStopped(-125)
					if err = container.ToDisk(); err != nil {
						return err
					}

					// kill monitor server
					if err = syscall.Kill(container.monitorState.Pid, syscall.SIGTERM); err != nil {
						log.Errorf("kill monitor server with pid %v error: %v", container.monitorState.Pid, err)
						return err
					}

					// write monitor state
					container.monitorState.SetStopped(0)
					if err = container.WriteMonitorState(); err != nil {
						log.Errorf("write monitor state error: %v", err)
						return err
					}
				} else { // external container is running
					// register to graph driver
					if err := container.daemon.driver.Register(container.ID); err != nil {
						log.Errorf("register container to graph driver error: %v", err)
					}
					monitor := NewMonitorProxy(container, false)
					container.exMonitor = monitor
					if err := monitor.RunStatePoller(); err != nil {
						log.Errorf("Container %s run StatePoll failed: %v", container.ID, err)
						return err
					}
				}
			}
		}
	}
	return nil
}