예제 #1
0
파일: push.go 프로젝트: beginnor/docker
func (s *TagStore) pushRepository(r *registry.Session, out io.Writer, localName, remoteName string, localRepo map[string]string, tag string, sf *utils.StreamFormatter) error {
	out = utils.NewWriteFlusher(out)
	log.Debugf("Local repo: %s", localRepo)
	imgList, tagsByImage, err := s.getImageList(localRepo, tag)
	if err != nil {
		return err
	}

	out.Write(sf.FormatStatus("", "Sending image list"))

	var (
		repoData   *registry.RepositoryData
		imageIndex []*registry.ImgData
	)

	for _, imgId := range imgList {
		if tags, exists := tagsByImage[imgId]; exists {
			// If an image has tags you must add an entry in the image index
			// for each tag
			for _, tag := range tags {
				imageIndex = append(imageIndex, &registry.ImgData{
					ID:  imgId,
					Tag: tag,
				})
			}
		} else {
			// If the image does not have a tag it still needs to be sent to the
			// registry with an empty tag so that it is accociated with the repository
			imageIndex = append(imageIndex, &registry.ImgData{
				ID:  imgId,
				Tag: "",
			})

		}
	}

	log.Debugf("Preparing to push %s with the following images and tags", localRepo)
	for _, data := range imageIndex {
		log.Debugf("Pushing ID: %s with Tag: %s", data.ID, data.Tag)
	}

	// Register all the images in a repository with the registry
	// If an image is not in this list it will not be associated with the repository
	repoData, err = r.PushImageJSONIndex(remoteName, imageIndex, false, nil)
	if err != nil {
		return err
	}

	nTag := 1
	if tag == "" {
		nTag = len(localRepo)
	}
	for _, ep := range repoData.Endpoints {
		out.Write(sf.FormatStatus("", "Pushing repository %s (%d tags)", localName, nTag))

		for _, imgId := range imgList {
			if r.LookupRemoteImage(imgId, ep, repoData.Tokens) {
				out.Write(sf.FormatStatus("", "Image %s already pushed, skipping", utils.TruncateID(imgId)))
			} else {
				if _, err := s.pushImage(r, out, remoteName, imgId, ep, repoData.Tokens, sf); err != nil {
					// FIXME: Continue on error?
					return err
				}
			}

			for _, tag := range tagsByImage[imgId] {
				out.Write(sf.FormatStatus("", "Pushing tag for rev [%s] on {%s}", utils.TruncateID(imgId), ep+"repositories/"+remoteName+"/tags/"+tag))

				if err := r.PushRegistryTag(remoteName, imgId, tag, ep, repoData.Tokens); err != nil {
					return err
				}
			}
		}
	}

	if _, err := r.PushImageJSONIndex(remoteName, imageIndex, true, repoData.Endpoints); err != nil {
		return err
	}

	return nil
}
예제 #2
0
파일: pull.go 프로젝트: beginnor/docker
func (s *TagStore) pullRepository(r *registry.Session, out io.Writer, localName, remoteName, askedTag string, sf *utils.StreamFormatter, parallel bool) error {
	out.Write(sf.FormatStatus("", "Pulling repository %s", localName))

	repoData, err := r.GetRepositoryData(remoteName)
	if err != nil {
		if strings.Contains(err.Error(), "HTTP code: 404") {
			return fmt.Errorf("Error: image %s not found", remoteName)
		} else {
			// Unexpected HTTP error
			return err
		}
	}

	log.Debugf("Retrieving the tag list")
	tagsList, err := r.GetRemoteTags(repoData.Endpoints, remoteName, repoData.Tokens)
	if err != nil {
		log.Errorf("%v", err)
		return err
	}

	for tag, id := range tagsList {
		repoData.ImgList[id] = &registry.ImgData{
			ID:       id,
			Tag:      tag,
			Checksum: "",
		}
	}

	log.Debugf("Registering tags")
	// If no tag has been specified, pull them all
	if askedTag == "" {
		for tag, id := range tagsList {
			repoData.ImgList[id].Tag = tag
		}
	} else {
		// Otherwise, check that the tag exists and use only that one
		id, exists := tagsList[askedTag]
		if !exists {
			return fmt.Errorf("Tag %s not found in repository %s", askedTag, localName)
		}
		repoData.ImgList[id].Tag = askedTag
	}

	errors := make(chan error)
	for _, image := range repoData.ImgList {
		downloadImage := func(img *registry.ImgData) {
			if askedTag != "" && img.Tag != askedTag {
				log.Debugf("(%s) does not match %s (id: %s), skipping", img.Tag, askedTag, img.ID)
				if parallel {
					errors <- nil
				}
				return
			}

			if img.Tag == "" {
				log.Debugf("Image (id: %s) present in this repository but untagged, skipping", img.ID)
				if parallel {
					errors <- nil
				}
				return
			}

			// ensure no two downloads of the same image happen at the same time
			if c, err := s.poolAdd("pull", "img:"+img.ID); err != nil {
				if c != nil {
					out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Layer already being pulled by another client. Waiting.", nil))
					<-c
					out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Download complete", nil))
				} else {
					log.Debugf("Image (id: %s) pull is already running, skipping: %v", img.ID, err)
				}
				if parallel {
					errors <- nil
				}
				return
			}
			defer s.poolRemove("pull", "img:"+img.ID)

			out.Write(sf.FormatProgress(utils.TruncateID(img.ID), fmt.Sprintf("Pulling image (%s) from %s", img.Tag, localName), nil))
			success := false
			var lastErr error
			for _, ep := range repoData.Endpoints {
				out.Write(sf.FormatProgress(utils.TruncateID(img.ID), fmt.Sprintf("Pulling image (%s) from %s, endpoint: %s", img.Tag, localName, ep), nil))
				if err := s.pullImage(r, out, img.ID, ep, repoData.Tokens, sf); err != nil {
					// It's not ideal that only the last error is returned, it would be better to concatenate the errors.
					// As the error is also given to the output stream the user will see the error.
					lastErr = err
					out.Write(sf.FormatProgress(utils.TruncateID(img.ID), fmt.Sprintf("Error pulling image (%s) from %s, endpoint: %s, %s", img.Tag, localName, ep, err), nil))
					continue
				}
				success = true
				break
			}
			if !success {
				err := fmt.Errorf("Error pulling image (%s) from %s, %v", img.Tag, localName, lastErr)
				out.Write(sf.FormatProgress(utils.TruncateID(img.ID), err.Error(), nil))
				if parallel {
					errors <- err
					return
				}
			}
			out.Write(sf.FormatProgress(utils.TruncateID(img.ID), "Download complete", nil))

			if parallel {
				errors <- nil
			}
		}

		if parallel {
			go downloadImage(image)
		} else {
			downloadImage(image)
		}
	}
	if parallel {
		var lastError error
		for i := 0; i < len(repoData.ImgList); i++ {
			if err := <-errors; err != nil {
				lastError = err
			}
		}
		if lastError != nil {
			return lastError
		}

	}
	for tag, id := range tagsList {
		if askedTag != "" && tag != askedTag {
			continue
		}
		if err := s.Set(localName, tag, id, true); err != nil {
			return err
		}
	}

	return nil
}