Golang Client.PullImage方法代码示例

// RunDaemon creates the docker container, pulling images if necessary, starts
// the container and returns the container information. It does not wait for
// the container to exit.
func RunDaemon(client dockerclient.Client, conf *dockerclient.ContainerConfig, name string) (*dockerclient.ContainerInfo, error) {

	// attempts to create the contianer
	id, err := client.CreateContainer(conf, name)
	if err != nil {
		// and pull the image and re-create if that fails
		err = client.PullImage(conf.Image, nil)
		if err != nil {
			return nil, err
		}
		id, err = client.CreateContainer(conf, name)
		if err != nil {
			client.RemoveContainer(id, true, true)
			return nil, err
		}
	}

	// fetches the container information
	info, err := client.InspectContainer(id)
	if err != nil {
		client.RemoveContainer(id, true, true)
		return nil, err
	}

	// starts the container
	err = client.StartContainer(id, &conf.HostConfig)
	if err != nil {
		client.RemoveContainer(id, true, true)
		return nil, err
	}

	return info, err
}

func PullImage(client dockerclient.Client, service *Service, image string) error {
	taglessRemote, tag := parsers.ParseRepositoryTag(image)
	if tag == "" {
		image = utils.ImageReference(taglessRemote, tags.DEFAULTTAG)
	}

	repoInfo, err := registry.ParseRepositoryInfo(taglessRemote)
	if err != nil {
		return err
	}

	authConfig := cliconfig.AuthConfig{}
	if service.context.ConfigFile != nil && repoInfo != nil && repoInfo.Index != nil {
		authConfig = registry.ResolveAuthConfig(service.context.ConfigFile, repoInfo.Index)
	}

	err = client.PullImage(image, &dockerclient.AuthConfig{
		Username: authConfig.Username,
		Password: authConfig.Password,
		Email:    authConfig.Email,
	})

	if err != nil {
		logrus.Errorf("Failed to pull image %s: %v", image, err)
	}

	return err
}

func Start(client dockerclient.Client, conf *dockerclient.ContainerConfig, auth *dockerclient.AuthConfig, pull bool) (*dockerclient.ContainerInfo, error) {

	// force-pull the image if specified.
	if pull {
		log.Printf("Pulling image %s", conf.Image)
		client.PullImage(conf.Image, auth)
	}

	// attempts to create the contianer
	id, err := client.CreateContainer(conf, "", auth)
	if err != nil {
		log.Printf("Pulling image %s", conf.Image)

		// and pull the image and re-create if that fails
		err = client.PullImage(conf.Image, auth)
		if err != nil {
			log.Errorf("Error pulling %s. %s\n", conf.Image, err)
			return nil, err
		}
		id, err = client.CreateContainer(conf, "", auth)
		if err != nil {
			log.Errorf("Error creating %s. %s\n", conf.Image, err)
			client.RemoveContainer(id, true, true)
			return nil, err
		}
	}

	// fetches the container information
	info, err := client.InspectContainer(id)
	if err != nil {
		log.Errorf("Error inspecting %s. %s\n", conf.Image, err)
		client.RemoveContainer(id, true, true)
		return nil, err
	}

	// starts the container
	err = client.StartContainer(id, &conf.HostConfig)
	if err != nil {
		log.Errorf("Error starting %s. %s\n", conf.Image, err)
	}
	return info, err
}

// ImageID returns the image ID for the given image name. If the imageName is
// not known, it will also attempt to pull the image as well.
func ImageID(d dockerclient.Client, imageName string, auth *dockerclient.AuthConfig) (string, error) {
	id, err := imageIDFromList(d, imageName)
	if err != nil {
		return "", err
	}
	if id != "" {
		return id, nil
	}

	if err := d.PullImage(imageName, auth); err != nil {
		return "", stackerr.Wrap(err)
	}

	id, err = imageIDFromList(d, imageName)
	if err != nil {
		return "", err
	}
	if id != "" {
		return id, nil
	}

	return "", stackerr.Newf("image named %q could not be identified", imageName)
}

func (e *engine) runJob(c context.Context, r *Task, updater *updater, client dockerclient.Client) error {

	name := fmt.Sprintf("drone_build_%d_job_%d", r.Build.ID, r.Job.ID)

	defer func() {
		if r.Job.Status == model.StatusRunning {
			r.Job.Status = model.StatusError
			r.Job.Finished = time.Now().UTC().Unix()
			r.Job.ExitCode = 255
		}
		if r.Job.Status == model.StatusPending {
			r.Job.Status = model.StatusError
			r.Job.Started = time.Now().UTC().Unix()
			r.Job.Finished = time.Now().UTC().Unix()
			r.Job.ExitCode = 255
		}
		updater.SetJob(c, r)

		client.KillContainer(name, "9")
		client.RemoveContainer(name, true, true)
	}()

	// marks the task as running
	r.Job.Status = model.StatusRunning
	r.Job.Started = time.Now().UTC().Unix()

	// encode the build payload to write to stdin
	// when launching the build container
	in, err := encodeToLegacyFormat(r)
	if err != nil {
		log.Errorf("failure to marshal work. %s", err)
		return err
	}

	// CREATE AND START BUILD
	args := DefaultBuildArgs
	if r.Build.Event == model.EventPull {
		args = DefaultPullRequestArgs
	}
	args = append(args, "--")
	args = append(args, string(in))

	conf := &dockerclient.ContainerConfig{
		Image:      DefaultAgent,
		Entrypoint: DefaultEntrypoint,
		Cmd:        args,
		Env:        e.envs,
		HostConfig: dockerclient.HostConfig{
			Binds: []string{"/var/run/docker.sock:/var/run/docker.sock"},
		},
		Volumes: map[string]struct{}{
			"/var/run/docker.sock": struct{}{},
		},
	}

	log.Infof("preparing container %s", name)
	client.PullImage(conf.Image, nil)

	_, err = docker.RunDaemon(client, conf, name)
	if err != nil {
		log.Errorf("error starting build container. %s", err)
		return err
	}

	// UPDATE STATUS

	err = updater.SetJob(c, r)
	if err != nil {
		log.Errorf("error updating job status as running. %s", err)
		return err
	}

	// WAIT FOR OUTPUT
	info, builderr := docker.Wait(client, name)

	switch {
	case info.State.ExitCode == 128:
		r.Job.ExitCode = info.State.ExitCode
		r.Job.Status = model.StatusKilled
	case info.State.ExitCode == 130:
		r.Job.ExitCode = info.State.ExitCode
		r.Job.Status = model.StatusKilled
	case builderr != nil:
		r.Job.Status = model.StatusError
	case info.State.ExitCode != 0:
		r.Job.ExitCode = info.State.ExitCode
		r.Job.Status = model.StatusFailure
	default:
		r.Job.Status = model.StatusSuccess
	}

	// send the logs to the datastore
	var buf bytes.Buffer
	rc, err := client.ContainerLogs(name, docker.LogOpts)
	if err != nil && builderr != nil {
		buf.WriteString("Error launching build")
		buf.WriteString(builderr.Error())
	} else if err != nil {
		buf.WriteString("Error launching build")
		buf.WriteString(err.Error())
//.........这里部分代码省略.........