Golang DockerCli.In方法代码示例

func runLoad(dockerCli *command.DockerCli, opts loadOptions) error {

	var input io.Reader = dockerCli.In()
	if opts.input != "" {
		file, err := os.Open(opts.input)
		if err != nil {
			return err
		}
		defer file.Close()
		input = file
	}
	if !dockerCli.Out().IsTerminal() {
		opts.quiet = true
	}
	response, err := dockerCli.Client().ImageLoad(context.Background(), input, opts.quiet)
	if err != nil {
		return err
	}
	defer response.Body.Close()

	if response.Body != nil && response.JSON {
		return jsonmessage.DisplayJSONMessagesToStream(response.Body, dockerCli.Out(), nil)
	}

	_, err = io.Copy(dockerCli.Out(), response.Body)
	return err
}

func runLoad(dockerCli *command.DockerCli, opts loadOptions) error {

	var input io.Reader = dockerCli.In()
	if opts.input != "" {
		file, err := os.Open(opts.input)
		if err != nil {
			return err
		}
		defer file.Close()
		input = file
	}

	// To avoid getting stuck, verify that a tar file is given either in
	// the input flag or through stdin and if not display an error message and exit.
	if opts.input == "" && dockerCli.In().IsTerminal() {
		return fmt.Errorf("requested load from stdin, but stdin is empty")
	}

	if !dockerCli.Out().IsTerminal() {
		opts.quiet = true
	}
	response, err := dockerCli.Client().ImageLoad(context.Background(), input, opts.quiet)
	if err != nil {
		return err
	}
	defer response.Body.Close()

	if response.Body != nil && response.JSON {
		return jsonmessage.DisplayJSONMessagesToStream(response.Body, dockerCli.Out(), nil)
	}

	_, err = io.Copy(dockerCli.Out(), response.Body)
	return err
}

func runSecretCreate(dockerCli *command.DockerCli, options createOptions) error {
	client := dockerCli.Client()
	ctx := context.Background()

	var in io.Reader = dockerCli.In()
	if options.file != "-" {
		file, err := system.OpenSequential(options.file)
		if err != nil {
			return err
		}
		in = file
		defer file.Close()
	}

	secretData, err := ioutil.ReadAll(in)
	if err != nil {
		return fmt.Errorf("Error reading content from %q: %v", options.file, err)
	}

	spec := swarm.SecretSpec{
		Annotations: swarm.Annotations{
			Name:   options.name,
			Labels: runconfigopts.ConvertKVStringsToMap(options.labels.GetAll()),
		},
		Data: secretData,
	}

	r, err := client.SecretCreate(ctx, spec)
	if err != nil {
		return err
	}

	fmt.Fprintln(dockerCli.Out(), r.ID)
	return nil
}

func runPrune(dockerCli *command.DockerCli, opts pruneOptions) (spaceReclaimed uint64, output string, err error) {
	pruneFilters := opts.filter.Value()
	pruneFilters.Add("dangling", fmt.Sprintf("%v", !opts.all))

	warning := danglingWarning
	if opts.all {
		warning = allImageWarning
	}
	if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
		return
	}

	report, err := dockerCli.Client().ImagesPrune(context.Background(), pruneFilters)
	if err != nil {
		return
	}

	if len(report.ImagesDeleted) > 0 {
		output = "Deleted Images:\n"
		for _, st := range report.ImagesDeleted {
			if st.Untagged != "" {
				output += fmt.Sprintln("untagged:", st.Untagged)
			} else {
				output += fmt.Sprintln("deleted:", st.Deleted)
			}
		}
		spaceReclaimed = report.SpaceReclaimed
	}

	return
}

func runUnlock(dockerCli *command.DockerCli, opts unlockOptions) error {
	client := dockerCli.Client()
	ctx := context.Background()

	// First see if the node is actually part of a swarm, and if it is actually locked first.
	// If it's in any other state than locked, don't ask for the key.
	info, err := client.Info(ctx)
	if err != nil {
		return err
	}

	switch info.Swarm.LocalNodeState {
	case swarm.LocalNodeStateInactive:
		return errors.New("Error: This node is not part of a swarm")
	case swarm.LocalNodeStateLocked:
		break
	default:
		return errors.New("Error: swarm is not locked")
	}

	key, err := readKey(dockerCli.In(), "Please enter unlock key: ")
	if err != nil {
		return err
	}
	req := swarm.UnlockRequest{
		UnlockKey: key,
	}

	return client.SwarmUnlock(ctx, req)
}

func acceptPrivileges(dockerCli *command.DockerCli, name string) func(privileges types.PluginPrivileges) (bool, error) {
	return func(privileges types.PluginPrivileges) (bool, error) {
		fmt.Fprintf(dockerCli.Out(), "Plugin %q is requesting the following privileges:\n", name)
		for _, privilege := range privileges {
			fmt.Fprintf(dockerCli.Out(), " - %s: %v\n", privilege.Name, privilege.Value)
		}

		fmt.Fprint(dockerCli.Out(), "Do you grant the above permissions? [y/N] ")
		reader := bufio.NewReader(dockerCli.In())
		line, _, err := reader.ReadLine()
		if err != nil {
			return false, err
		}
		return strings.ToLower(string(line)) == "y", nil
	}
}

func runPrune(dockerCli *command.DockerCli, opts pruneOptions) (output string, err error) {
	if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
		return
	}

	report, err := dockerCli.Client().NetworksPrune(context.Background(), types.NetworksPruneConfig{})
	if err != nil {
		return
	}

	if len(report.NetworksDeleted) > 0 {
		output = "Deleted Networks:\n"
		for _, id := range report.NetworksDeleted {
			output += id + "\n"
		}
	}

	return
}

func runPrune(dockerCli *command.DockerCli, opts pruneOptions) error {
	var message string

	if opts.all {
		message = fmt.Sprintf(warning, allImageDesc)
	} else {
		message = fmt.Sprintf(warning, danglingImageDesc)
	}

	if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), message) {
		return nil
	}

	var spaceReclaimed uint64

	for _, pruneFn := range []func(dockerCli *command.DockerCli) (uint64, string, error){
		prune.RunContainerPrune,
		prune.RunVolumePrune,
		prune.RunNetworkPrune,
	} {
		spc, output, err := pruneFn(dockerCli)
		if err != nil {
			return err
		}
		spaceReclaimed += spc
		if output != "" {
			fmt.Fprintln(dockerCli.Out(), output)
		}
	}

	spc, output, err := prune.RunImagePrune(dockerCli, opts.all)
	if err != nil {
		return err
	}
	if spc > 0 {
		spaceReclaimed += spc
		fmt.Fprintln(dockerCli.Out(), output)
	}

	fmt.Fprintln(dockerCli.Out(), "Total reclaimed space:", units.HumanSize(float64(spaceReclaimed)))

	return nil
}

func newUnlockCommand(dockerCli *command.DockerCli) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "unlock",
		Short: "Unlock swarm",
		Args:  cli.ExactArgs(0),
		RunE: func(cmd *cobra.Command, args []string) error {
			client := dockerCli.Client()
			ctx := context.Background()

			// First see if the node is actually part of a swarm, and if it's is actually locked first.
			// If it's in any other state than locked, don't ask for the key.
			info, err := client.Info(ctx)
			if err != nil {
				return err
			}

			switch info.Swarm.LocalNodeState {
			case swarm.LocalNodeStateInactive:
				return errors.New("Error: This node is not part of a swarm")
			case swarm.LocalNodeStateLocked:
				break
			default:
				return errors.New("Error: swarm is not locked")
			}

			key, err := readKey(dockerCli.In(), "Please enter unlock key: ")
			if err != nil {
				return err
			}
			req := swarm.UnlockRequest{
				UnlockKey: key,
			}

			return client.SwarmUnlock(ctx, req)
		},
	}

	return cmd
}

func runImport(dockerCli *command.DockerCli, opts importOptions) error {
	var (
		in      io.Reader
		srcName = opts.source
	)

	if opts.source == "-" {
		in = dockerCli.In()
	} else if !urlutil.IsURL(opts.source) {
		srcName = "-"
		file, err := os.Open(opts.source)
		if err != nil {
			return err
		}
		defer file.Close()
		in = file
	}

	source := types.ImageImportSource{
		Source:     in,
		SourceName: srcName,
	}

	options := types.ImageImportOptions{
		Message: opts.message,
		Changes: opts.changes.GetAll(),
	}

	clnt := dockerCli.Client()

	responseBody, err := clnt.ImageImport(context.Background(), source, opts.reference, options)
	if err != nil {
		return err
	}
	defer responseBody.Close()

	return jsonmessage.DisplayJSONMessagesToStream(responseBody, dockerCli.Out(), nil)
}

func newUnlockCommand(dockerCli *command.DockerCli) *cobra.Command {
	cmd := &cobra.Command{
		Use:   "unlock",
		Short: "Unlock swarm",
		Args:  cli.ExactArgs(0),
		RunE: func(cmd *cobra.Command, args []string) error {
			client := dockerCli.Client()
			ctx := context.Background()

			key, err := readKey(dockerCli.In(), "Please enter unlock key: ")
			if err != nil {
				return err
			}
			req := swarm.UnlockRequest{
				UnlockKey: key,
			}

			return client.SwarmUnlock(ctx, req)
		},
	}

	return cmd
}

func runLoad(dockerCli *command.DockerCli, opts loadOptions) error {

	var input io.Reader = dockerCli.In()
	if opts.input != "" {
		// We use system.OpenSequential to use sequential file access on Windows, avoiding
		// depleting the standby list un-necessarily. On Linux, this equates to a regular os.Open.
		file, err := system.OpenSequential(opts.input)
		if err != nil {
			return err
		}
		defer file.Close()
		input = file
	}

	// To avoid getting stuck, verify that a tar file is given either in
	// the input flag or through stdin and if not display an error message and exit.
	if opts.input == "" && dockerCli.In().IsTerminal() {
		return fmt.Errorf("requested load from stdin, but stdin is empty")
	}

	if !dockerCli.Out().IsTerminal() {
		opts.quiet = true
	}
	response, err := dockerCli.Client().ImageLoad(context.Background(), input, opts.quiet)
	if err != nil {
		return err
	}
	defer response.Body.Close()

	if response.Body != nil && response.JSON {
		return jsonmessage.DisplayJSONMessagesToStream(response.Body, dockerCli.Out(), nil)
	}

	_, err = io.Copy(dockerCli.Out(), response.Body)
	return err
}

func runStart(dockerCli *command.DockerCli, opts *startOptions) error {
	ctx, cancelFun := context.WithCancel(context.Background())

	if opts.attach || opts.openStdin {
		// We're going to attach to a container.
		// 1. Ensure we only have one container.
		if len(opts.containers) > 1 {
			return fmt.Errorf("You cannot start and attach multiple containers at once.")
		}

		// 2. Attach to the container.
		container := opts.containers[0]
		c, err := dockerCli.Client().ContainerInspect(ctx, container)
		if err != nil {
			return err
		}

		// We always use c.ID instead of container to maintain consistency during `docker start`
		if !c.Config.Tty {
			sigc := ForwardAllSignals(ctx, dockerCli, c.ID)
			defer signal.StopCatch(sigc)
		}

		if opts.detachKeys != "" {
			dockerCli.ConfigFile().DetachKeys = opts.detachKeys
		}

		options := types.ContainerAttachOptions{
			Stream:     true,
			Stdin:      opts.openStdin && c.Config.OpenStdin,
			Stdout:     true,
			Stderr:     true,
			DetachKeys: dockerCli.ConfigFile().DetachKeys,
		}

		var in io.ReadCloser

		if options.Stdin {
			in = dockerCli.In()
		}

		resp, errAttach := dockerCli.Client().ContainerAttach(ctx, c.ID, options)
		if errAttach != nil && errAttach != httputil.ErrPersistEOF {
			// ContainerAttach return an ErrPersistEOF (connection closed)
			// means server met an error and already put it in Hijacked connection,
			// we would keep the error and read the detailed error message from hijacked connection
			return errAttach
		}
		defer resp.Close()
		cErr := promise.Go(func() error {
			errHijack := holdHijackedConnection(ctx, dockerCli, c.Config.Tty, in, dockerCli.Out(), dockerCli.Err(), resp)
			if errHijack == nil {
				return errAttach
			}
			return errHijack
		})

		// 3. We should open a channel for receiving status code of the container
		// no matter it's detached, removed on daemon side(--rm) or exit normally.
		statusChan, statusErr := waitExitOrRemoved(dockerCli, context.Background(), c.ID, c.HostConfig.AutoRemove)
		startOptions := types.ContainerStartOptions{
			CheckpointID: opts.checkpoint,
		}

		// 4. Start the container.
		if err := dockerCli.Client().ContainerStart(ctx, c.ID, startOptions); err != nil {
			cancelFun()
			<-cErr
			if c.HostConfig.AutoRemove && statusErr == nil {
				// wait container to be removed
				<-statusChan
			}
			return err
		}

		// 5. Wait for attachment to break.
		if c.Config.Tty && dockerCli.Out().IsTerminal() {
			if err := MonitorTtySize(ctx, dockerCli, c.ID, false); err != nil {
				fmt.Fprintf(dockerCli.Err(), "Error monitoring TTY size: %s\n", err)
			}
		}
		if attchErr := <-cErr; attchErr != nil {
			return attchErr
		}

		if statusErr != nil {
			return fmt.Errorf("can't get container's exit code: %v", statusErr)
		}

		if status := <-statusChan; status != 0 {
			return cli.StatusError{StatusCode: status}
		}
	} else if opts.checkpoint != "" {
		if len(opts.containers) > 1 {
			return fmt.Errorf("You cannot restore multiple containers at once.")
		}
		container := opts.containers[0]
		startOptions := types.ContainerStartOptions{
			CheckpointID: opts.checkpoint,
		}
//.........这里部分代码省略.........

func runRun(dockerCli *command.DockerCli, flags *pflag.FlagSet, opts *runOptions, copts *containerOptions) error {
	stdout, stderr, stdin := dockerCli.Out(), dockerCli.Err(), dockerCli.In()
	client := dockerCli.Client()
	// TODO: pass this as an argument
	cmdPath := "run"

	var (
		flAttach                              *opttypes.ListOpts
		ErrConflictAttachDetach               = errors.New("Conflicting options: -a and -d")
		ErrConflictRestartPolicyAndAutoRemove = errors.New("Conflicting options: --restart and --rm")
	)

	config, hostConfig, networkingConfig, err := parse(flags, copts)

	// just in case the parse does not exit
	if err != nil {
		reportError(stderr, cmdPath, err.Error(), true)
		return cli.StatusError{StatusCode: 125}
	}

	if hostConfig.AutoRemove && !hostConfig.RestartPolicy.IsNone() {
		return ErrConflictRestartPolicyAndAutoRemove
	}
	if hostConfig.OomKillDisable != nil && *hostConfig.OomKillDisable && hostConfig.Memory == 0 {
		fmt.Fprintln(stderr, "WARNING: Disabling the OOM killer on containers without setting a '-m/--memory' limit may be dangerous.")
	}

	if len(hostConfig.DNS) > 0 {
		// check the DNS settings passed via --dns against
		// localhost regexp to warn if they are trying to
		// set a DNS to a localhost address
		for _, dnsIP := range hostConfig.DNS {
			if dns.IsLocalhost(dnsIP) {
				fmt.Fprintf(stderr, "WARNING: Localhost DNS setting (--dns=%s) may fail in containers.\n", dnsIP)
				break
			}
		}
	}

	config.ArgsEscaped = false

	if !opts.detach {
		if err := dockerCli.In().CheckTty(config.AttachStdin, config.Tty); err != nil {
			return err
		}
	} else {
		if fl := flags.Lookup("attach"); fl != nil {
			flAttach = fl.Value.(*opttypes.ListOpts)
			if flAttach.Len() != 0 {
				return ErrConflictAttachDetach
			}
		}

		config.AttachStdin = false
		config.AttachStdout = false
		config.AttachStderr = false
		config.StdinOnce = false
	}

	// Disable sigProxy when in TTY mode
	if config.Tty {
		opts.sigProxy = false
	}

	// Telling the Windows daemon the initial size of the tty during start makes
	// a far better user experience rather than relying on subsequent resizes
	// to cause things to catch up.
	if runtime.GOOS == "windows" {
		hostConfig.ConsoleSize[0], hostConfig.ConsoleSize[1] = dockerCli.Out().GetTtySize()
	}

	ctx, cancelFun := context.WithCancel(context.Background())

	createResponse, err := createContainer(ctx, dockerCli, config, hostConfig, networkingConfig, hostConfig.ContainerIDFile, opts.name)
	if err != nil {
		reportError(stderr, cmdPath, err.Error(), true)
		return runStartContainerErr(err)
	}
	if opts.sigProxy {
		sigc := ForwardAllSignals(ctx, dockerCli, createResponse.ID)
		defer signal.StopCatch(sigc)
	}
	var (
		waitDisplayID chan struct{}
		errCh         chan error
	)
	if !config.AttachStdout && !config.AttachStderr {
		// Make this asynchronous to allow the client to write to stdin before having to read the ID
		waitDisplayID = make(chan struct{})
		go func() {
			defer close(waitDisplayID)
			fmt.Fprintln(stdout, createResponse.ID)
		}()
	}
	attach := config.AttachStdin || config.AttachStdout || config.AttachStderr
	if attach {
		var (
			out, cerr io.Writer
			in        io.ReadCloser
		)
//.........这里部分代码省略.........

func runExec(dockerCli *command.DockerCli, opts *execOptions, container string, execCmd []string) error {
	execConfig, err := parseExec(opts, execCmd)
	// just in case the ParseExec does not exit
	if container == "" || err != nil {
		return cli.StatusError{StatusCode: 1}
	}

	if opts.detachKeys != "" {
		dockerCli.ConfigFile().DetachKeys = opts.detachKeys
	}

	// Send client escape keys
	execConfig.DetachKeys = dockerCli.ConfigFile().DetachKeys

	ctx := context.Background()
	client := dockerCli.Client()

	response, err := client.ContainerExecCreate(ctx, container, *execConfig)
	if err != nil {
		return err
	}

	execID := response.ID
	if execID == "" {
		fmt.Fprintln(dockerCli.Out(), "exec ID empty")
		return nil
	}

	//Temp struct for execStart so that we don't need to transfer all the execConfig
	if !execConfig.Detach {
		if err := dockerCli.In().CheckTty(execConfig.AttachStdin, execConfig.Tty); err != nil {
			return err
		}
	} else {
		execStartCheck := types.ExecStartCheck{
			Detach: execConfig.Detach,
			Tty:    execConfig.Tty,
		}

		if err := client.ContainerExecStart(ctx, execID, execStartCheck); err != nil {
			return err
		}
		// For now don't print this - wait for when we support exec wait()
		// fmt.Fprintf(dockerCli.Out(), "%s\n", execID)
		return nil
	}

	// Interactive exec requested.
	var (
		out, stderr io.Writer
		in          io.ReadCloser
		errCh       chan error
	)

	if execConfig.AttachStdin {
		in = dockerCli.In()
	}
	if execConfig.AttachStdout {
		out = dockerCli.Out()
	}
	if execConfig.AttachStderr {
		if execConfig.Tty {
			stderr = dockerCli.Out()
		} else {
			stderr = dockerCli.Err()
		}
	}

	resp, err := client.ContainerExecAttach(ctx, execID, *execConfig)
	if err != nil {
		return err
	}
	defer resp.Close()
	errCh = promise.Go(func() error {
		return holdHijackedConnection(ctx, dockerCli, execConfig.Tty, in, out, stderr, resp)
	})

	if execConfig.Tty && dockerCli.In().IsTerminal() {
		if err := MonitorTtySize(ctx, dockerCli, execID, true); err != nil {
			fmt.Fprintln(dockerCli.Err(), "Error monitoring TTY size:", err)
		}
	}

	if err := <-errCh; err != nil {
		logrus.Debugf("Error hijack: %s", err)
		return err
	}

	var status int
	if _, status, err = getExecExitCode(ctx, client, execID); err != nil {
		return err
	}

	if status != 0 {
		return cli.StatusError{StatusCode: status}
	}

	return nil
}