Exemple #1
0
func (s *saveSession) saveImage(id image.ID) (map[layer.DiffID]distribution.Descriptor, error) {
	img, err := s.is.Get(id)
	if err != nil {
		return nil, err
	}

	if len(img.RootFS.DiffIDs) == 0 {
		return nil, fmt.Errorf("empty export - not implemented")
	}

	var parent digest.Digest
	var layers []string
	var foreignSrcs map[layer.DiffID]distribution.Descriptor
	for i := range img.RootFS.DiffIDs {
		v1Img := image.V1Image{
			Created: img.Created,
		}
		if i == len(img.RootFS.DiffIDs)-1 {
			v1Img = img.V1Image
		}
		rootFS := *img.RootFS
		rootFS.DiffIDs = rootFS.DiffIDs[:i+1]
		v1ID, err := v1.CreateID(v1Img, rootFS.ChainID(), parent)
		if err != nil {
			return nil, err
		}

		v1Img.ID = v1ID.Hex()
		if parent != "" {
			v1Img.Parent = parent.Hex()
		}

		src, err := s.saveLayer(rootFS.ChainID(), v1Img, img.Created)
		if err != nil {
			return nil, err
		}
		layers = append(layers, v1Img.ID)
		parent = v1ID
		if src.Digest != "" {
			if foreignSrcs == nil {
				foreignSrcs = make(map[layer.DiffID]distribution.Descriptor)
			}
			foreignSrcs[img.RootFS.DiffIDs[i]] = src
		}
	}

	configFile := filepath.Join(s.outDir, id.Digest().Hex()+".json")
	if err := ioutil.WriteFile(configFile, img.RawJSON(), 0644); err != nil {
		return nil, err
	}
	if err := system.Chtimes(configFile, img.Created, img.Created); err != nil {
		return nil, err
	}

	s.images[id].layers = layers
	return foreignSrcs, nil
}
Exemple #2
0
// CreateID creates an ID from v1 image, layerID and parent ID.
// Used for backwards compatibility with old clients.
func CreateID(v1Image image.V1Image, layerID layer.ChainID, parent digest.Digest) (digest.Digest, error) {
	v1Image.ID = ""
	v1JSON, err := json.Marshal(v1Image)
	if err != nil {
		return "", err
	}

	var config map[string]*json.RawMessage
	if err := json.Unmarshal(v1JSON, &config); err != nil {
		return "", err
	}

	// FIXME: note that this is slightly incompatible with RootFS logic
	config["layer_id"] = rawJSON(layerID)
	if parent != "" {
		config["parent"] = rawJSON(parent)
	}

	configJSON, err := json.Marshal(config)
	if err != nil {
		return "", err
	}
	logrus.Debugf("CreateV1ID %s", configJSON)

	return digest.FromBytes(configJSON), nil
}
Exemple #3
0
func (s *saveSession) saveImage(id image.ID) error {
	img, err := s.is.Get(id)
	if err != nil {
		return err
	}

	if len(img.RootFS.DiffIDs) == 0 {
		return fmt.Errorf("empty export - not implemented")
	}

	var parent digest.Digest
	var layers []string
	for i := range img.RootFS.DiffIDs {
		v1Img := image.V1Image{}
		if i == len(img.RootFS.DiffIDs)-1 {
			v1Img = img.V1Image
		}
		rootFS := *img.RootFS
		rootFS.DiffIDs = rootFS.DiffIDs[:i+1]
		v1ID, err := v1.CreateID(v1Img, rootFS.ChainID(), parent)
		if err != nil {
			return err
		}

		v1Img.ID = v1ID.Hex()
		if parent != "" {
			v1Img.Parent = parent.Hex()
		}

		if err := s.saveLayer(rootFS.ChainID(), v1Img, img.Created); err != nil {
			return err
		}
		layers = append(layers, v1Img.ID)
		parent = v1ID
	}

	configFile := filepath.Join(s.outDir, digest.Digest(id).Hex()+".json")
	if err := ioutil.WriteFile(configFile, img.RawJSON(), 0644); err != nil {
		return err
	}
	if err := os.Chtimes(configFile, img.Created, img.Created); err != nil {
		return err
	}

	s.images[id].layers = layers
	return nil
}