Ejemplo n.º 1
0
// PullImage pulls docker image
func (c *DockerClient) PullImage(name string) error {
	image := imagename.NewFromString(name)

	// e.g. s3:bucket-name/image-name
	if image.Storage == imagename.StorageS3 {
		if isOld, warning := imagename.WarnIfOldS3ImageName(name); isOld {
			c.log.Warn(warning)
		}

		return c.s3storage.Pull(name)
	}

	var (
		pipeReader, pipeWriter = io.Pipe()
		fdOut, isTerminalOut   = term.GetFdInfo(c.log.Out)
		out                    = c.log.Out
		errch                  = make(chan error, 1)
	)

	if !isTerminalOut {
		out = c.log.Writer()
	}

	opts := docker.PullImageOptions{
		Repository:    image.NameWithRegistry(),
		Registry:      image.Registry,
		Tag:           image.GetTag(),
		OutputStream:  pipeWriter,
		RawJSONStream: true,
	}

	c.log.Infof("| Pull image %s", image)
	c.log.Debugf("Pull image %s with options: %# v", image, opts)

	go func() {
		errch <- jsonmessage.DisplayJSONMessagesStream(pipeReader, out, fdOut, isTerminalOut)
	}()

	auth, err := dockerclient.GetAuthForRegistry(c.auth, image)
	if err != nil {
		return fmt.Errorf("Failed to authenticate registry %s, error: %s", image.Registry, err)
	}

	if err := c.client.PullImage(opts, auth); err != nil {
		return err
	}

	pipeWriter.Close()
	return <-errch
}
Ejemplo n.º 2
0
// TagImage adds tag to the image
func (c *DockerClient) TagImage(imageID, imageName string) error {
	img := imagename.NewFromString(imageName)
	if isOld, warning := imagename.WarnIfOldS3ImageName(imageName); isOld {
		c.log.Warn(warning)
	}

	c.log.Infof("| Tag %.12s -> %s", imageID, img)

	opts := docker.TagImageOptions{
		Repo:  img.NameWithRegistry(),
		Tag:   img.GetTag(),
		Force: true,
	}

	c.log.Debugf("Tag image %s with options: %# v", imageID, opts)

	return c.client.TagImage(imageID, opts)
}
Ejemplo n.º 3
0
// lookupImage looks up for the image by name and returns *docker.Image object (result of the inspect)
// `Pull` config option defines whether we want to update the latest version of the image from the remote registry
// See build.Config struct for more details about other build config options.
//
// If `Pull` is false, it tries to lookup locally by exact matching, e.g. if the image is already
// pulled with that exact name given (no fuzzy semver matching)
//
// Then the function fetches the list of all pulled images and tries to match one of them by the given name.
//
// If `Pull` is set to true or if it cannot find the image locally, it then fetches all image
// tags from the remote registry and finds the best match for the given image name.
//
// If it cannot find the image either locally or in the remote registry, it returns `nil`
//
// In case the given image has sha256 tag, it looks for it locally and pulls if it's not found.
// No semver matching is done for sha256 tagged images.
//
// See also TestBuild_LookupImage_* test cases in build_test.go
func (b *Build) lookupImage(name string) (img *docker.Image, err error) {
	var (
		candidate, remoteCandidate *imagename.ImageName

		imgName = imagename.NewFromString(name)
		pull    = false
		hub     = b.cfg.Pull
		isSha   = imgName.TagIsSha()
	)

	// If hub is true, then there is no sense to inspect the local image
	if !hub || isSha {
		if isOld, warning := imagename.WarnIfOldS3ImageName(name); isOld {
			log.Warn(warning)
		}
		// Try to inspect image as is, without version resolution
		if img, err := b.client.InspectImage(imgName.String()); err != nil || img != nil {
			return img, err
		}
	}

	if isSha {
		// If we are still here and image not found locally, we want to pull it
		candidate = imgName
		hub = false
		pull = true
	}

	if !isSha && !hub {
		// List local images
		var localImages = []*imagename.ImageName{}
		if localImages, err = b.client.ListImages(); err != nil {
			return nil, err
		}
		// Resolve local candidate
		candidate = imgName.ResolveVersion(localImages, true)
	}

	// In case we want to include external images as well, pulling list of available
	// images from the remote registry
	if hub || candidate == nil {
		log.Debugf("Getting list of tags for %s from the registry", imgName)

		var remoteImages []*imagename.ImageName

		if remoteImages, err = b.client.ListImageTags(imgName.String()); err != nil {
			err = fmt.Errorf("Failed to list tags of image %s from the remote registry, error: %s", imgName, err)
			return
		}

		// Since we found the remote image, we want to pull it
		if remoteCandidate = imgName.ResolveVersion(remoteImages, false); remoteCandidate != nil {
			pull = true
			candidate = remoteCandidate

			// If we've found needed image on s3 it should be pulled in the same name style as lookuped image
			candidate.IsOldS3Name = imgName.IsOldS3Name
		}
	}

	// If not candidate found, it's an error
	if candidate == nil {
		err = fmt.Errorf("Image not found: %s (also checked in the remote registry)", imgName)
		return
	}

	if !isSha && imgName.GetTag() != candidate.GetTag() {
		if remoteCandidate != nil {
			log.Infof("Resolve %s --> %s (found remotely)", imgName, candidate.GetTag())
		} else {
			log.Infof("Resolve %s --> %s", imgName, candidate.GetTag())
		}
	}

	if pull {
		if err = b.client.PullImage(candidate.String()); err != nil {
			return
		}
	}

	return b.client.InspectImage(candidate.String())
}
Ejemplo n.º 4
0
// pushImageInner pushes the image is the inner straightforward push without retries
func (c *DockerClient) pushImageInner(imageName string) (digest string, err error) {
	img := imagename.NewFromString(imageName)

	// Use direct S3 image pusher instead
	if img.Storage == imagename.StorageS3 {
		if isOld, warning := imagename.WarnIfOldS3ImageName(imageName); isOld {
			c.log.Warn(warning)
		}
		return c.s3storage.Push(imageName)
	}

	var (
		buf                    bytes.Buffer
		pipeReader, pipeWriter = io.Pipe()
		outStream              = io.MultiWriter(pipeWriter, &buf)
		fdOut, isTerminalOut   = term.GetFdInfo(c.log.Out)
		out                    = c.log.Out

		opts = docker.PushImageOptions{
			Name:          img.NameWithRegistry(),
			Tag:           img.GetTag(),
			Registry:      img.Registry,
			OutputStream:  outStream,
			RawJSONStream: true,
		}
		errch = make(chan error, 1)
	)

	if !isTerminalOut {
		out = c.log.Writer()
	}

	c.log.Infof("| Push %s", img)

	c.log.Debugf("Push with options: %# v", opts)

	// TODO: DisplayJSONMessagesStream may fail by client.PushImage run without errors
	go func() {
		errch <- jsonmessage.DisplayJSONMessagesStream(pipeReader, out, fdOut, isTerminalOut)
	}()

	auth, err := dockerclient.GetAuthForRegistry(c.auth, img)
	if err != nil {
		return "", fmt.Errorf("Failed to authenticate registry %s, error: %s", img.Registry, err)
	}

	if err := c.client.PushImage(opts, auth); err != nil {
		return "", err
	}
	pipeWriter.Close()

	if err := <-errch; err != nil {
		return "", fmt.Errorf("Failed to process json stream, error %s", err)
	}

	// It is the best way to have pushed image digest so far
	matches := captureDigest.FindStringSubmatch(buf.String())
	if len(matches) > 0 {
		digest = matches[1]
	}

	return digest, nil
}