Golang AttachToContainerOptions.OutputStream方法代码示例

// this funtion simply abstracts out the first phase of attaching to the container that was originally in line with the RunContainer() method
func runContainerAttach(attached chan struct{}, container *docker.Container, opts RunContainerOptions, d *stiDocker) *sync.WaitGroup {
	attachOpts := docker.AttachToContainerOptions{
		Container: container.ID,
		Success:   attached,
		Stream:    true,
	}
	if opts.Stdin != nil {
		attachOpts.InputStream = opts.Stdin
		attachOpts.Stdin = true
	}
	if opts.Stdout != nil {
		attachOpts.OutputStream = opts.Stdout
		attachOpts.Stdout = true
	}
	if opts.Stderr != nil {
		attachOpts.ErrorStream = opts.Stderr
		attachOpts.Stderr = true
	}

	wg := sync.WaitGroup{}
	go func() {
		wg.Add(1)
		defer wg.Done()
		if err := d.client.AttachToContainer(attachOpts); err != nil {
			glog.Errorf("Unable to attach container with %v", attachOpts)
		}
	}()
	return &wg
}

// RunContainer creates and starts a container using the image specified in the options with the ability
// to stream input or output
func (d *stiDocker) RunContainer(opts RunContainerOptions) (err error) {
	// get info about the specified image
	image := getImageName(opts.Image)
	var imageMetadata *docker.Image
	if opts.PullImage {
		imageMetadata, err = d.CheckAndPullImage(image)
	} else {
		imageMetadata, err = d.client.InspectImage(image)
	}
	if err != nil {
		glog.Errorf("Unable to get image metadata for %s: %v", image, err)
		return err
	}

	// base directory for all STI commands
	var commandBaseDir string
	// untar operation destination directory
	tarDestination := opts.Destination
	if len(tarDestination) == 0 {
		tarDestination = getDestination(imageMetadata)
	}
	if opts.ExternalScripts {
		// for external scripts we must always append 'scripts' because this is
		// the default subdirectory inside tar for them
		commandBaseDir = filepath.Join(tarDestination, "scripts")
		glog.V(2).Infof("Both scripts and untarred source will be placed in '%s'", tarDestination)
	} else {
		// for internal scripts we can have separate path for scripts and untar operation destination
		scriptsURL := opts.ScriptsURL
		if len(scriptsURL) == 0 {
			scriptsURL = getScriptsURL(imageMetadata)
		}
		commandBaseDir = strings.TrimPrefix(scriptsURL, "image://")
		glog.V(2).Infof("Base directory for STI scripts is '%s'. Untarring destination is '%s'.",
			commandBaseDir, tarDestination)
	}

	cmd := []string{filepath.Join(commandBaseDir, string(opts.Command))}
	// when calling assemble script with Stdin parameter set (the tar file)
	// we need to first untar the whole archive and only then call the assemble script
	if opts.Stdin != nil && (opts.Command == api.Assemble || opts.Command == api.Usage) {
		cmd = []string{"/bin/sh", "-c", fmt.Sprintf("tar -C %s -xf - && %s",
			tarDestination, filepath.Join(commandBaseDir, string(opts.Command)))}
	}
	config := docker.Config{
		Image: image,
		Cmd:   cmd,
	}

	if opts.Env != nil {
		config.Env = opts.Env
	}
	if opts.Stdin != nil {
		config.OpenStdin = true
		config.StdinOnce = true
	}
	if opts.Stdout != nil {
		config.AttachStdout = true
	}

	glog.V(2).Infof("Creating container using config: %+v", config)
	container, err := d.client.CreateContainer(docker.CreateContainerOptions{Name: "", Config: &config})
	if err != nil {
		return err
	}
	defer d.RemoveContainer(container.ID)

	glog.V(2).Infof("Attaching to container")
	attached := make(chan struct{})
	attachOpts := docker.AttachToContainerOptions{
		Container: container.ID,
		Success:   attached,
		Stream:    true,
	}
	if opts.Stdin != nil {
		attachOpts.InputStream = opts.Stdin
		attachOpts.Stdin = true
	} else if opts.Stdout != nil {
		attachOpts.OutputStream = opts.Stdout
		attachOpts.Stdout = true
	}

	if opts.Stderr != nil {
		attachOpts.ErrorStream = opts.Stderr
		attachOpts.Stderr = true
	}

	wg := sync.WaitGroup{}
	go func() {
		wg.Add(1)
		defer wg.Done()
		if err := d.client.AttachToContainer(attachOpts); err != nil {
			glog.Errorf("Unable to attach container with %v", attachOpts)
		}
	}()
	attached <- <-attached

	// If attaching both stdin and stdout or stderr, attach stdout and stderr in
//.........这里部分代码省略.........