Golang container.IsRunning函數代碼示例

// checkImageDeleteConflict determines whether there are any conflicts
// preventing deletion of the given image from this daemon. A hard conflict is
// any image which has the given image as a parent or any running container
// using the image. A soft conflict is any tags/digest referencing the given
// image or any stopped container using the image. If ignoreSoftConflicts is
// true, this function will not check for soft conflict conditions.
func (daemon *Daemon) checkImageDeleteConflict(imgID image.ID, mask conflictType) *imageDeleteConflict {
	// Check if the image has any descendent images.
	if mask&conflictDependentChild != 0 && len(daemon.imageStore.Children(imgID)) > 0 {
		return &imageDeleteConflict{
			hard:    true,
			imgID:   imgID,
			message: "image has dependent child images",
		}
	}

	if mask&conflictRunningContainer != 0 {
		// Check if any running container is using the image.
		for _, container := range daemon.List() {
			if !container.IsRunning() {
				// Skip this until we check for soft conflicts later.
				continue
			}

			if container.ImageID == imgID {
				return &imageDeleteConflict{
					imgID:   imgID,
					hard:    true,
					used:    true,
					message: fmt.Sprintf("image is being used by running container %s", stringid.TruncateID(container.ID)),
				}
			}
		}
	}

	// Check if any repository tags/digest reference this image.
	if mask&conflictActiveReference != 0 && len(daemon.referenceStore.References(imgID)) > 0 {
		return &imageDeleteConflict{
			imgID:   imgID,
			message: "image is referenced in one or more repositories",
		}
	}

	if mask&conflictStoppedContainer != 0 {
		// Check if any stopped containers reference this image.
		for _, container := range daemon.List() {
			if container.IsRunning() {
				// Skip this as it was checked above in hard conflict conditions.
				continue
			}

			if container.ImageID == imgID {
				return &imageDeleteConflict{
					imgID:   imgID,
					used:    true,
					message: fmt.Sprintf("image is being used by stopped container %s", stringid.TruncateID(container.ID)),
				}
			}
		}
	}

	return nil
}

func (daemon *Daemon) checkImageDeleteSoftConflict(imgID image.ID) *imageDeleteConflict {
	// Check if any repository tags/digest reference this image.
	if len(daemon.referenceStore.References(imgID)) > 0 {
		return &imageDeleteConflict{
			imgID:   imgID,
			message: "image is referenced in one or more repositories",
		}
	}

	// Check if any stopped containers reference this image.
	for _, container := range daemon.List() {
		if container.IsRunning() {
			// Skip this as it was checked above in hard conflict conditions.
			continue
		}

		if container.ImageID == imgID {
			return &imageDeleteConflict{
				imgID:   imgID,
				used:    true,
				message: fmt.Sprintf("image is being used by stopped container %s", stringid.TruncateID(container.ID)),
			}
		}
	}

	return nil
}

func (daemon *Daemon) checkImageDeleteHardConflict(imgID image.ID) *imageDeleteConflict {
	// Check if the image has any descendent images.
	if len(daemon.imageStore.Children(imgID)) > 0 {
		return &imageDeleteConflict{
			hard:    true,
			imgID:   imgID,
			message: "image has dependent child images",
		}
	}

	// Check if any running container is using the image.
	for _, container := range daemon.List() {
		if !container.IsRunning() {
			// Skip this until we check for soft conflicts later.
			continue
		}

		if container.ImageID == imgID {
			return &imageDeleteConflict{
				imgID:   imgID,
				hard:    true,
				used:    true,
				message: fmt.Sprintf("image is being used by running container %s", stringid.TruncateID(container.ID)),
			}
		}
	}

	return nil
}

// getExecConfig looks up the exec instance by name. If the container associated
// with the exec instance is stopped or paused, it will return an error.
func (d *Daemon) getExecConfig(name string) (*exec.Config, error) {
	ec := d.execCommands.Get(name)

	// If the exec is found but its container is not in the daemon's list of
	// containers then it must have been deleted, in which case instead of
	// saying the container isn't running, we should return a 404 so that
	// the user sees the same error now that they will after the
	// 5 minute clean-up loop is run which erases old/dead execs.

	if ec != nil {
		if container := d.containers.Get(ec.ContainerID); container != nil {
			if !container.IsRunning() {
				return nil, fmt.Errorf("Container %s is not running: %s", container.ID, container.State.String())
			}
			if container.IsPaused() {
				return nil, errExecPaused(container.ID)
			}
			if container.IsRestarting() {
				return nil, errContainerIsRestarting(container.ID)
			}
			return ec, nil
		}
	}

	return nil, errExecNotFound(name)
}

// ContainerStart starts a container.
func (daemon *Daemon) ContainerStart(name string, hostConfig *containertypes.HostConfig) error {
	container, err := daemon.GetContainer(name)
	if err != nil {
		return err
	}

	if container.IsPaused() {
		return fmt.Errorf("Cannot start a paused container, try unpause instead.")
	}

	if container.IsRunning() {
		err := fmt.Errorf("Container already started")
		return errors.NewErrorWithStatusCode(err, http.StatusNotModified)
	}

	// Windows does not have the backwards compatibility issue here.
	if runtime.GOOS != "windows" {
		// This is kept for backward compatibility - hostconfig should be passed when
		// creating a container, not during start.
		if hostConfig != nil {
			logrus.Warn("DEPRECATED: Setting host configuration options when the container starts is deprecated and will be removed in Docker 1.12")
			oldNetworkMode := container.HostConfig.NetworkMode
			if err := daemon.setSecurityOptions(container, hostConfig); err != nil {
				return err
			}
			if err := daemon.setHostConfig(container, hostConfig); err != nil {
				return err
			}
			newNetworkMode := container.HostConfig.NetworkMode
			if string(oldNetworkMode) != string(newNetworkMode) {
				// if user has change the network mode on starting, clean up the
				// old networks. It is a deprecated feature and will be removed in Docker 1.12
				container.NetworkSettings.Networks = nil
				if err := container.ToDisk(); err != nil {
					return err
				}
			}
			container.InitDNSHostConfig()
		}
	} else {
		if hostConfig != nil {
			return fmt.Errorf("Supplying a hostconfig on start is not supported. It should be supplied on create")
		}
	}

	// check if hostConfig is in line with the current system settings.
	// It may happen cgroups are umounted or the like.
	if _, err = daemon.verifyContainerSettings(container.HostConfig, nil, false); err != nil {
		return err
	}
	// Adapt for old containers in case we have updates in this function and
	// old containers never have chance to call the new function in create stage.
	if err := daemon.adaptContainerSettings(container.HostConfig, false); err != nil {
		return err
	}

	return daemon.containerStart(container)
}

// ContainerStart starts a container.
func (daemon *Daemon) ContainerStart(name string, hostConfig *runconfig.HostConfig) error {
	container, err := daemon.Get(name)
	if err != nil {
		return err
	}

	if container.IsPaused() {
		return derr.ErrorCodeStartPaused
	}

	if container.IsRunning() {
		return derr.ErrorCodeAlreadyStarted
	}

	// Windows does not have the backwards compatibility issue here.
	if runtime.GOOS != "windows" {
		// This is kept for backward compatibility - hostconfig should be passed when
		// creating a container, not during start.
		if hostConfig != nil {
			logrus.Warn("DEPRECATED: Setting host configuration options when the container starts is deprecated and will be removed in Docker 1.12")
			container.Lock()
			if err := parseSecurityOpt(container, hostConfig); err != nil {
				container.Unlock()
				return err
			}
			container.Unlock()
			if err := daemon.adaptContainerSettings(hostConfig, false); err != nil {
				return err
			}
			if err := daemon.setHostConfig(container, hostConfig); err != nil {
				return err
			}
			container.InitDNSHostConfig()
		}
	} else {
		if hostConfig != nil {
			return derr.ErrorCodeHostConfigStart
		}
	}

	// check if hostConfig is in line with the current system settings.
	// It may happen cgroups are umounted or the like.
	if _, err = daemon.verifyContainerSettings(container.HostConfig, nil); err != nil {
		return err
	}

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

	return nil
}

// ContainerStop looks for the given container and terminates it,
// waiting the given number of seconds before forcefully killing the
// container. If a negative number of seconds is given, ContainerStop
// will wait for a graceful termination. An error is returned if the
// container is not found, is already stopped, or if there is a
// problem stopping the container.
func (daemon *Daemon) ContainerStop(name string, seconds int) error {
	container, err := daemon.GetContainer(name)
	if err != nil {
		return err
	}
	if !container.IsRunning() {
		return derr.ErrorCodeStopped
	}
	if err := daemon.containerStop(container, seconds); err != nil {
		return derr.ErrorCodeCantStop.WithArgs(name, err)
	}
	return nil
}

func (d *Daemon) getActiveContainer(name string) (*container.Container, error) {
	container, err := d.GetContainer(name)
	if err != nil {
		return nil, err
	}

	if !container.IsRunning() {
		return nil, derr.ErrorCodeNotRunning.WithArgs(name)
	}
	if container.IsPaused() {
		return nil, derr.ErrorCodeExecPaused.WithArgs(name)
	}
	return container, nil
}

// ContainerStop looks for the given container and terminates it,
// waiting the given number of seconds before forcefully killing the
// container. If a negative number of seconds is given, ContainerStop
// will wait for a graceful termination. An error is returned if the
// container is not found, is already stopped, or if there is a
// problem stopping the container.
func (daemon *Daemon) ContainerStop(name string, seconds int) error {
	container, err := daemon.GetContainer(name)
	if err != nil {
		return err
	}
	if !container.IsRunning() {
		err := fmt.Errorf("Container %s is already stopped", name)
		return errors.NewErrorWithStatusCode(err, http.StatusNotModified)
	}
	if err := daemon.containerStop(container, seconds); err != nil {
		return fmt.Errorf("Cannot stop container %s: %v", name, err)
	}
	return nil
}

func (d *Daemon) getActiveContainer(name string) (*container.Container, error) {
	container, err := d.GetContainer(name)
	if err != nil {
		return nil, err
	}

	if !container.IsRunning() {
		return nil, errNotRunning{container.ID}
	}
	if container.IsPaused() {
		return nil, errExecPaused(name)
	}
	if container.IsRestarting() {
		return nil, errContainerIsRestarting(container.ID)
	}
	return container, nil
}

// Commit creates a new filesystem image from the current state of a container.
// The image can optionally be tagged into a repository.
func (daemon *Daemon) Commit(name string, c *backend.ContainerCommitConfig) (string, error) {
	container, err := daemon.GetContainer(name)
	if err != nil {
		return "", err
	}

	// It is not possible to commit a running container on Windows
	if runtime.GOOS == "windows" && container.IsRunning() {
		return "", fmt.Errorf("Windows does not support commit of a running container")
	}

	if c.Pause && !container.IsPaused() {
		daemon.containerPause(container)
		defer daemon.containerUnpause(container)
	}

	newConfig, err := dockerfile.BuildFromConfig(c.Config, c.Changes)
	if err != nil {
		return "", err
	}

	if c.MergeConfigs {
		if err := merge(newConfig, container.Config); err != nil {
			return "", err
		}
	}

	rwTar, err := daemon.exportContainerRw(container)
	if err != nil {
		return "", err
	}
	defer func() {
		if rwTar != nil {
			rwTar.Close()
		}
	}()

	var history []image.History
	rootFS := image.NewRootFS()
	osVersion := ""
	var osFeatures []string

	if container.ImageID != "" {
		img, err := daemon.imageStore.Get(container.ImageID)
		if err != nil {
			return "", err
		}
		history = img.History
		rootFS = img.RootFS
		osVersion = img.OSVersion
		osFeatures = img.OSFeatures
	}

	l, err := daemon.layerStore.Register(rwTar, rootFS.ChainID())
	if err != nil {
		return "", err
	}
	defer layer.ReleaseAndLog(daemon.layerStore, l)

	h := image.History{
		Author:     c.Author,
		Created:    time.Now().UTC(),
		CreatedBy:  strings.Join(container.Config.Cmd, " "),
		Comment:    c.Comment,
		EmptyLayer: true,
	}

	if diffID := l.DiffID(); layer.DigestSHA256EmptyTar != diffID {
		h.EmptyLayer = false
		rootFS.Append(diffID)
	}

	history = append(history, h)

	config, err := json.Marshal(&image.Image{
		V1Image: image.V1Image{
			DockerVersion:   dockerversion.Version,
			Config:          newConfig,
			Architecture:    runtime.GOARCH,
			OS:              runtime.GOOS,
			Container:       container.ID,
			ContainerConfig: *container.Config,
			Author:          c.Author,
			Created:         h.Created,
		},
		RootFS:     rootFS,
		History:    history,
		OSFeatures: osFeatures,
		OSVersion:  osVersion,
	})

	if err != nil {
		return "", err
	}

	id, err := daemon.imageStore.Create(config)
	if err != nil {
		return "", err
//.........這裏部分代碼省略.........

// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(ctx context.Context, containerName string, config *backend.ContainerLogsConfig, started chan struct{}) error {
	container, err := daemon.GetContainer(containerName)
	if err != nil {
		return err
	}

	if !(config.ShowStdout || config.ShowStderr) {
		return fmt.Errorf("You must choose at least one stream")
	}

	cLog, err := daemon.getLogger(container)
	if err != nil {
		return err
	}
	logReader, ok := cLog.(logger.LogReader)
	if !ok {
		return logger.ErrReadLogsNotSupported
	}

	follow := config.Follow && container.IsRunning()
	tailLines, err := strconv.Atoi(config.Tail)
	if err != nil {
		tailLines = -1
	}

	logrus.Debug("logs: begin stream")

	var since time.Time
	if config.Since != "" {
		s, n, err := timetypes.ParseTimestamps(config.Since, 0)
		if err != nil {
			return err
		}
		since = time.Unix(s, n)
	}
	readConfig := logger.ReadConfig{
		Since:  since,
		Tail:   tailLines,
		Follow: follow,
	}
	logs := logReader.ReadLogs(readConfig)

	wf := ioutils.NewWriteFlusher(config.OutStream)
	defer wf.Close()
	close(started)
	wf.Flush()

	var outStream io.Writer
	outStream = wf
	errStream := outStream
	if !container.Config.Tty {
		errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
		outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
	}

	for {
		select {
		case err := <-logs.Err:
			logrus.Errorf("Error streaming logs: %v", err)
			return nil
		case <-ctx.Done():
			logs.Close()
			return nil
		case msg, ok := <-logs.Msg:
			if !ok {
				logrus.Debug("logs: end stream")
				logs.Close()
				if cLog != container.LogDriver {
					// Since the logger isn't cached in the container, which occurs if it is running, it
					// must get explicitly closed here to avoid leaking it and any file handles it has.
					if err := cLog.Close(); err != nil {
						logrus.Errorf("Error closing logger: %v", err)
					}
				}
				return nil
			}
			logLine := msg.Line
			if config.Details {
				logLine = append([]byte(msg.Attrs.String()+" "), logLine...)
			}
			if config.Timestamps {
				logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
			}
			if msg.Source == "stdout" && config.ShowStdout {
				outStream.Write(logLine)
			}
			if msg.Source == "stderr" && config.ShowStderr {
				errStream.Write(logLine)
			}
		}
	}
}

// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(containerName string, config *backend.ContainerLogsConfig, started chan struct{}) error {
	container, err := daemon.GetContainer(containerName)
	if err != nil {
		return err
	}

	if !(config.ShowStdout || config.ShowStderr) {
		return fmt.Errorf("You must choose at least one stream")
	}

	cLog, err := daemon.getLogger(container)
	if err != nil {
		return err
	}
	logReader, ok := cLog.(logger.LogReader)
	if !ok {
		return logger.ErrReadLogsNotSupported
	}

	follow := config.Follow && container.IsRunning()
	tailLines, err := strconv.Atoi(config.Tail)
	if err != nil {
		tailLines = -1
	}

	logrus.Debug("logs: begin stream")

	var since time.Time
	if config.Since != "" {
		s, n, err := timetypes.ParseTimestamps(config.Since, 0)
		if err != nil {
			return err
		}
		since = time.Unix(s, n)
	}
	readConfig := logger.ReadConfig{
		Since:  since,
		Tail:   tailLines,
		Follow: follow,
	}
	logs := logReader.ReadLogs(readConfig)

	wf := ioutils.NewWriteFlusher(config.OutStream)
	defer wf.Close()
	close(started)
	wf.Flush()

	var outStream io.Writer = wf
	errStream := outStream
	if !container.Config.Tty {
		errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
		outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
	}

	for {
		select {
		case err := <-logs.Err:
			logrus.Errorf("Error streaming logs: %v", err)
			return nil
		case <-config.Stop:
			logs.Close()
			return nil
		case msg, ok := <-logs.Msg:
			if !ok {
				logrus.Debugf("logs: end stream")
				return nil
			}
			logLine := msg.Line
			if config.Timestamps {
				logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
			}
			if msg.Source == "stdout" && config.ShowStdout {
				outStream.Write(logLine)
			}
			if msg.Source == "stderr" && config.ShowStderr {
				errStream.Write(logLine)
			}
		}
	}
}

// ContainerStats writes information about the container to the stream
// given in the config object.
func (daemon *Daemon) ContainerStats(ctx context.Context, prefixOrName string, config *backend.ContainerStatsConfig) error {
	if runtime.GOOS == "solaris" {
		return fmt.Errorf("%+v does not support stats", runtime.GOOS)
	}
	// Remote API version (used for backwards compatibility)
	apiVersion := config.Version

	container, err := daemon.GetContainer(prefixOrName)
	if err != nil {
		return err
	}

	// If the container is not running and requires no stream, return an empty stats.
	if !container.IsRunning() && !config.Stream {
		return json.NewEncoder(config.OutStream).Encode(&types.Stats{})
	}

	outStream := config.OutStream
	if config.Stream {
		wf := ioutils.NewWriteFlusher(outStream)
		defer wf.Close()
		wf.Flush()
		outStream = wf
	}

	var preCPUStats types.CPUStats
	var preRead time.Time
	getStatJSON := func(v interface{}) *types.StatsJSON {
		ss := v.(types.StatsJSON)
		ss.PreCPUStats = preCPUStats
		ss.PreRead = preRead
		preCPUStats = ss.CPUStats
		preRead = ss.Read
		return &ss
	}

	enc := json.NewEncoder(outStream)

	updates := daemon.subscribeToContainerStats(container)
	defer daemon.unsubscribeToContainerStats(container, updates)

	noStreamFirstFrame := true
	for {
		select {
		case v, ok := <-updates:
			if !ok {
				return nil
			}

			var statsJSON interface{}
			statsJSONPost120 := getStatJSON(v)
			if versions.LessThan(apiVersion, "1.21") {
				if runtime.GOOS == "windows" {
					return errors.New("API versions pre v1.21 do not support stats on Windows")
				}
				var (
					rxBytes   uint64
					rxPackets uint64
					rxErrors  uint64
					rxDropped uint64
					txBytes   uint64
					txPackets uint64
					txErrors  uint64
					txDropped uint64
				)
				for _, v := range statsJSONPost120.Networks {
					rxBytes += v.RxBytes
					rxPackets += v.RxPackets
					rxErrors += v.RxErrors
					rxDropped += v.RxDropped
					txBytes += v.TxBytes
					txPackets += v.TxPackets
					txErrors += v.TxErrors
					txDropped += v.TxDropped
				}
				statsJSON = &v1p20.StatsJSON{
					Stats: statsJSONPost120.Stats,
					Network: types.NetworkStats{
						RxBytes:   rxBytes,
						RxPackets: rxPackets,
						RxErrors:  rxErrors,
						RxDropped: rxDropped,
						TxBytes:   txBytes,
						TxPackets: txPackets,
						TxErrors:  txErrors,
						TxDropped: txDropped,
					},
				}
			} else {
				statsJSON = statsJSONPost120
			}

			if !config.Stream && noStreamFirstFrame {
				// prime the cpu stats so they aren't 0 in the final output
				noStreamFirstFrame = false
				continue
			}

//.........這裏部分代碼省略.........

// ContainerLogs hooks up a container's stdout and stderr streams
// configured with the given struct.
func (daemon *Daemon) ContainerLogs(containerName string, config *ContainerLogsConfig) error {
	container, err := daemon.GetContainer(containerName)
	if err != nil {
		return derr.ErrorCodeNoSuchContainer.WithArgs(containerName)
	}

	if !(config.UseStdout || config.UseStderr) {
		return derr.ErrorCodeNeedStream
	}

	outStream := config.OutStream
	errStream := outStream
	if !container.Config.Tty {
		errStream = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
		outStream = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
	}
	config.OutStream = outStream

	cLog, err := daemon.getLogger(container)
	if err != nil {
		return err
	}
	logReader, ok := cLog.(logger.LogReader)
	if !ok {
		return logger.ErrReadLogsNotSupported
	}

	follow := config.Follow && container.IsRunning()
	tailLines, err := strconv.Atoi(config.Tail)
	if err != nil {
		tailLines = -1
	}

	logrus.Debug("logs: begin stream")
	readConfig := logger.ReadConfig{
		Since:  config.Since,
		Tail:   tailLines,
		Follow: follow,
	}
	logs := logReader.ReadLogs(readConfig)

	for {
		select {
		case err := <-logs.Err:
			logrus.Errorf("Error streaming logs: %v", err)
			return nil
		case <-config.Stop:
			logs.Close()
			return nil
		case msg, ok := <-logs.Msg:
			if !ok {
				logrus.Debugf("logs: end stream")
				return nil
			}
			logLine := msg.Line
			if config.Timestamps {
				logLine = append([]byte(msg.Timestamp.Format(logger.TimeFormat)+" "), logLine...)
			}
			if msg.Source == "stdout" && config.UseStdout {
				outStream.Write(logLine)
			}
			if msg.Source == "stderr" && config.UseStderr {
				errStream.Write(logLine)
			}
		}
	}
}