Golang Container.ToDiskLocking方法代码示例

// ConnectToNetwork connects a container to a network
func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings) error {
	if endpointConfig == nil {
		endpointConfig = &networktypes.EndpointSettings{}
	}
	if !container.Running {
		if container.RemovalInProgress || container.Dead {
			return errRemovalContainer(container.ID)
		}

		n, err := daemon.FindNetwork(idOrName)
		if err == nil && n != nil {
			if err := daemon.updateNetworkConfig(container, n, endpointConfig, true); err != nil {
				return err
			}
		} else {
			container.NetworkSettings.Networks[idOrName] = &network.EndpointSettings{
				EndpointSettings: endpointConfig,
			}
		}
	} else if !daemon.isNetworkHotPluggable() {
		return fmt.Errorf(runtime.GOOS + " does not support connecting a running container to a network")
	} else {
		if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
			return err
		}
	}
	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}
	return nil
}

// Register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) Register(container *container.Container) error {
	// Attach to stdout and stderr
	if container.Config.OpenStdin {
		container.NewInputPipes()
	} else {
		container.NewNopInputPipe()
	}

	daemon.containers.Add(container.ID, container)
	daemon.idIndex.Add(container.ID)

	if container.IsRunning() {
		logrus.Debugf("killing old running container %s", container.ID)
		// Set exit code to 128 + SIGKILL (9) to properly represent unsuccessful exit
		container.SetStoppedLocking(&execdriver.ExitStatus{ExitCode: 137})
		// use the current driver and ensure that the container is dead x.x
		cmd := &execdriver.Command{
			CommonCommand: execdriver.CommonCommand{
				ID: container.ID,
			},
		}
		daemon.execDriver.Terminate(cmd)

		container.UnmountIpcMounts(mount.Unmount)

		daemon.Unmount(container)
		if err := container.ToDiskLocking(); err != nil {
			logrus.Errorf("Error saving stopped state to disk: %v", err)
		}
	}

	return nil
}

// DisconnectFromNetwork disconnects container from network n.
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, n libnetwork.Network, force bool) error {
	if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
		return runconfig.ErrConflictHostNetwork
	}
	if !container.Running {
		if container.RemovalInProgress || container.Dead {
			return errRemovalContainer(container.ID)
		}
		if _, ok := container.NetworkSettings.Networks[n.Name()]; ok {
			delete(container.NetworkSettings.Networks, n.Name())
		} else {
			return fmt.Errorf("container %s is not connected to the network %s", container.ID, n.Name())
		}
	} else {
		if err := disconnectFromNetwork(container, n, false); err != nil {
			return err
		}
	}

	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}

	attributes := map[string]string{
		"container": container.ID,
	}
	daemon.LogNetworkEventWithAttributes(n, "disconnect", attributes)
	return nil
}

// containerRestart attempts to gracefully stop and then start the
// container. When stopping, wait for the given duration in seconds to
// gracefully stop, before forcefully terminating the container. If
// given a negative duration, wait forever for a graceful stop.
func (daemon *Daemon) containerRestart(container *container.Container, seconds int) error {
	// Avoid unnecessarily unmounting and then directly mounting
	// the container when the container stops and then starts
	// again
	if err := daemon.Mount(container); err == nil {
		defer daemon.Unmount(container)
	}

	if container.IsRunning() {
		// set AutoRemove flag to false before stop so the container won't be
		// removed during restart process
		autoRemove := container.HostConfig.AutoRemove

		container.HostConfig.AutoRemove = false
		err := daemon.containerStop(container, seconds)
		// restore AutoRemove irrespective of whether the stop worked or not
		container.HostConfig.AutoRemove = autoRemove
		// containerStop will write HostConfig to disk, we shall restore AutoRemove
		// in disk too
		if toDiskErr := container.ToDiskLocking(); toDiskErr != nil {
			logrus.Errorf("Write container to disk error: %v", toDiskErr)
		}

		if err != nil {
			return err
		}
	}

	if err := daemon.containerStart(container, "", true); err != nil {
		return err
	}

	daemon.LogContainerEvent(container, "restart")
	return nil
}

// cleanupContainer unregisters a container from the daemon, stops stats
// collection and cleanly removes contents and metadata from the filesystem.
func (daemon *Daemon) cleanupContainer(container *container.Container, forceRemove bool) (err error) {
	if container.IsRunning() {
		if !forceRemove {
			return derr.ErrorCodeRmRunning
		}
		if err := daemon.Kill(container); err != nil {
			return derr.ErrorCodeRmFailed.WithArgs(err)
		}
	}

	// stop collection of stats for the container regardless
	// if stats are currently getting collected.
	daemon.statsCollector.stopCollection(container)

	if err = daemon.containerStop(container, 3); err != nil {
		return err
	}

	// Mark container dead. We don't want anybody to be restarting it.
	container.SetDead()

	// Save container state to disk. So that if error happens before
	// container meta file got removed from disk, then a restart of
	// docker should not make a dead container alive.
	if err := container.ToDiskLocking(); err != nil {
		logrus.Errorf("Error saving dying container to disk: %v", err)
	}

	// If force removal is required, delete container from various
	// indexes even if removal failed.
	defer func() {
		if err == nil || forceRemove {
			if _, err := daemon.containerGraphDB.Purge(container.ID); err != nil {
				logrus.Debugf("Unable to remove container from link graph: %s", err)
			}
			selinuxFreeLxcContexts(container.ProcessLabel)
			daemon.idIndex.Delete(container.ID)
			daemon.containers.Delete(container.ID)
			daemon.LogContainerEvent(container, "destroy")
		}
	}()

	if err = os.RemoveAll(container.Root); err != nil {
		return derr.ErrorCodeRmFS.WithArgs(container.ID, err)
	}

	metadata, err := daemon.layerStore.DeleteMount(container.ID)
	layer.LogReleaseMetadata(metadata)
	if err != nil && err != layer.ErrMountDoesNotExist {
		return derr.ErrorCodeRmDriverFS.WithArgs(daemon.driver, container.ID, err)
	}

	if err = daemon.execDriver.Clean(container.ID); err != nil {
		return derr.ErrorCodeRmExecDriver.WithArgs(container.ID, err)
	}

	return nil
}

// cleanupContainer unregisters a container from the daemon, stops stats
// collection and cleanly removes contents and metadata from the filesystem.
func (daemon *Daemon) cleanupContainer(container *container.Container, forceRemove bool) (err error) {
	if container.IsRunning() {
		if !forceRemove {
			err := fmt.Errorf("You cannot remove a running container %s. Stop the container before attempting removal or use -f", container.ID)
			return errors.NewRequestConflictError(err)
		}
		if err := daemon.Kill(container); err != nil {
			return fmt.Errorf("Could not kill running container %s, cannot remove - %v", container.ID, err)
		}
	}

	// stop collection of stats for the container regardless
	// if stats are currently getting collected.
	daemon.statsCollector.stopCollection(container)

	if err = daemon.containerStop(container, 3); err != nil {
		return err
	}

	// Mark container dead. We don't want anybody to be restarting it.
	container.SetDead()

	// Save container state to disk. So that if error happens before
	// container meta file got removed from disk, then a restart of
	// docker should not make a dead container alive.
	if err := container.ToDiskLocking(); err != nil && !os.IsNotExist(err) {
		logrus.Errorf("Error saving dying container to disk: %v", err)
	}

	// If force removal is required, delete container from various
	// indexes even if removal failed.
	defer func() {
		if err == nil || forceRemove {
			daemon.nameIndex.Delete(container.ID)
			daemon.linkIndex.delete(container)
			selinuxFreeLxcContexts(container.ProcessLabel)
			daemon.idIndex.Delete(container.ID)
			daemon.containers.Delete(container.ID)
			daemon.LogContainerEvent(container, "destroy")
		}
	}()

	if err = os.RemoveAll(container.Root); err != nil {
		return fmt.Errorf("Unable to remove filesystem for %v: %v", container.ID, err)
	}

	// When container creation fails and `RWLayer` has not been created yet, we
	// do not call `ReleaseRWLayer`
	if container.RWLayer != nil {
		metadata, err := daemon.layerStore.ReleaseRWLayer(container.RWLayer)
		layer.LogReleaseMetadata(metadata)
		if err != nil && err != layer.ErrMountDoesNotExist {
			return fmt.Errorf("Driver %s failed to remove root filesystem %s: %s", daemon.GraphDriverName(), container.ID, err)
		}
	}

	return nil
}

// ConnectToNetwork connects a container to a network
func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings) error {
	if !container.Running {
		return derr.ErrorCodeNotRunning.WithArgs(container.ID)
	}
	if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
		return err
	}
	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}
	return nil
}

func (daemon *Daemon) ensureName(container *container.Container) error {
	if container.Name == "" {
		name, err := daemon.generateNewName(container.ID)
		if err != nil {
			return err
		}
		container.Name = name

		if err := container.ToDiskLocking(); err != nil {
			logrus.Errorf("Error saving container name to disk: %v", err)
		}
	}
	return nil
}

// Register makes a container object usable by the daemon as <container.ID>
func (daemon *Daemon) Register(container *container.Container) error {
	if 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
	}

	// Attach to stdout and stderr
	if container.Config.OpenStdin {
		container.NewInputPipes()
	} else {
		container.NewNopInputPipe()
	}
	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)

	if container.IsRunning() {
		logrus.Debugf("killing old running container %s", container.ID)
		// Set exit code to 128 + SIGKILL (9) to properly represent unsuccessful exit
		container.SetStoppedLocking(&execdriver.ExitStatus{ExitCode: 137})
		// use the current driver and ensure that the container is dead x.x
		cmd := &execdriver.Command{
			CommonCommand: execdriver.CommonCommand{
				ID: container.ID,
			},
		}
		daemon.execDriver.Terminate(cmd)

		container.UnmountIpcMounts(mount.Unmount)

		daemon.Unmount(container)
		if err := container.ToDiskLocking(); err != nil {
			logrus.Errorf("Error saving stopped state to disk: %v", err)
		}
	}

	if err := daemon.prepareMountPoints(container); err != nil {
		return err
	}

	return nil
}

// DisconnectFromNetwork disconnects container from network n.
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, n libnetwork.Network) error {
	if !container.Running {
		return derr.ErrorCodeNotRunning.WithArgs(container.ID)
	}

	if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
		return runconfig.ErrConflictHostNetwork
	}

	if err := disconnectFromNetwork(container, n); err != nil {
		return err
	}

	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}
	return nil
}

// ConnectToNetwork connects a container to a network
func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings) error {
	if !container.Running {
		if container.RemovalInProgress || container.Dead {
			return derr.ErrorCodeRemovalContainer.WithArgs(container.ID)
		}
		if _, err := daemon.updateNetworkConfig(container, idOrName, endpointConfig, true); err != nil {
			return err
		}
	} else {
		if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
			return err
		}
	}
	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}
	return nil
}

func backportMountSpec(container *container.Container) error {
	for target, m := range container.MountPoints {
		if m.Spec.Type != "" {
			// if type is set on even one mount, no need to migrate
			return nil
		}
		if m.Name != "" {
			m.Type = mounttypes.TypeVolume
			m.Spec.Type = mounttypes.TypeVolume

			// make sure this is not an anyonmous volume before setting the spec source
			if _, exists := container.Config.Volumes[target]; !exists {
				m.Spec.Source = m.Name
			}
			if container.HostConfig.VolumeDriver != "" {
				m.Spec.VolumeOptions = &mounttypes.VolumeOptions{
					DriverConfig: &mounttypes.Driver{Name: container.HostConfig.VolumeDriver},
				}
			}
			if strings.Contains(m.Mode, "nocopy") {
				if m.Spec.VolumeOptions == nil {
					m.Spec.VolumeOptions = &mounttypes.VolumeOptions{}
				}
				m.Spec.VolumeOptions.NoCopy = true
			}
		} else {
			m.Type = mounttypes.TypeBind
			m.Spec.Type = mounttypes.TypeBind
			m.Spec.Source = m.Source
			if m.Propagation != "" {
				m.Spec.BindOptions = &mounttypes.BindOptions{
					Propagation: m.Propagation,
				}
			}
		}

		m.Spec.Target = m.Destination
		if !m.RW {
			m.Spec.ReadOnly = true
		}
	}
	return container.ToDiskLocking()
}

func disconnectFromNetwork(container *container.Container, n libnetwork.Network) error {

	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}

	var (
		ep   libnetwork.Endpoint
		sbox libnetwork.Sandbox
	)

	s := func(current libnetwork.Endpoint) bool {
		epInfo := current.Info()
		if epInfo == nil {
			return false
		}
		if sb := epInfo.Sandbox(); sb != nil {
			if sb.ContainerID() == container.ID {
				ep = current
				sbox = sb
				return true
			}
		}
		return false
	}
	n.WalkEndpoints(s)

	if ep == nil {
		return fmt.Errorf("container %s is not connected to the network", container.ID)
	}

	if err := ep.Leave(sbox); err != nil {
		return fmt.Errorf("container %s failed to leave network %s: %v", container.ID, n.Name(), err)
	}

	if err := ep.Delete(); err != nil {
		return fmt.Errorf("endpoint delete failed for container %s on network %s: %v", container.ID, n.Name(), err)
	}

	delete(container.NetworkSettings.Networks, n.Name())
	return nil
}

func (daemon *Daemon) registerName(container *container.Container) error {
	if daemon.Exists(container.ID) {
		return fmt.Errorf("Container is already loaded")
	}
	if err := validateID(container.ID); err != nil {
		return err
	}
	if container.Name == "" {
		name, err := daemon.generateNewName(container.ID)
		if err != nil {
			return err
		}
		container.Name = name

		if err := container.ToDiskLocking(); err != nil {
			logrus.Errorf("Error saving container name to disk: %v", err)
		}
	}
	return daemon.nameIndex.Reserve(container.Name, container.ID)
}

// DisconnectFromNetwork disconnects container from network n.
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, networkName string, force bool) error {
	n, err := daemon.FindNetwork(networkName)
	if !container.Running || (err != nil && force) {
		if container.RemovalInProgress || container.Dead {
			return errRemovalContainer(container.ID)
		}
		// In case networkName is resolved we will use n.Name()
		// this will cover the case where network id is passed.
		if n != nil {
			networkName = n.Name()
		}
		if _, ok := container.NetworkSettings.Networks[networkName]; !ok {
			return fmt.Errorf("container %s is not connected to the network %s", container.ID, networkName)
		}
		delete(container.NetworkSettings.Networks, networkName)
	} else if err == nil && !daemon.isNetworkHotPluggable() {
		return fmt.Errorf(runtime.GOOS + " does not support connecting a running container to a network")
	} else if err == nil {
		if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
			return runconfig.ErrConflictHostNetwork
		}

		if err := daemon.disconnectFromNetwork(container, n, false); err != nil {
			return err
		}
	} else {
		return err
	}

	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}

	if n != nil {
		attributes := map[string]string{
			"container": container.ID,
		}
		daemon.LogNetworkEventWithAttributes(n, "disconnect", attributes)
	}
	return nil
}