Example #1
0
File: file.go Project: nhlfr/rkt
func (lb *FileBackend) BuildACIV22(layerIDs []string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
	if len(layerIDs) < 2 {
		return nil, nil, fmt.Errorf("insufficient layers for oci image")
	}
	var aciLayerPaths []string
	var aciManifests []*schema.ImageManifest
	var curPwl []string

	imageID := layerIDs[0]
	layerIDs = layerIDs[1:]

	j, err := getJsonV22(lb.file, imageID)
	if err != nil {
		return nil, nil, fmt.Errorf("error getting layer from file: %v", err)
	}
	imageConfig := typesV2.ImageConfig{}
	if err := json.Unmarshal(j, &imageConfig); err != nil {
		return nil, nil, fmt.Errorf("error unmarshaling image data: %v", err)
	}

	tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
	if err != nil {
		return nil, nil, fmt.Errorf("error creating dir: %v", err)
	}
	defer os.RemoveAll(tmpDir)
	for i := len(layerIDs) - 1; i >= 0; i-- {
		parts := strings.Split(layerIDs[i], ":")
		tmpLayerPath := path.Join(tmpDir, parts[1])
		tmpLayerPath += ".tar"
		layerTarPath := path.Join(append([]string{"blobs"}, parts...)...)
		layerFile, err := extractEmbeddedLayer(lb.file, layerTarPath, tmpLayerPath)
		if err != nil {
			return nil, nil, fmt.Errorf("error getting layer from file: %v", err)
		}
		defer layerFile.Close()
		log.Debug("Generating layer ACI...")
		var aciPath string
		var manifest *schema.ImageManifest
		if i != 0 {
			aciPath, manifest, err = internal.GenerateACI22LowerLayer(dockerURL, parts[1], outputDir, layerFile, curPwl, compression)
		} else {
			aciPath, manifest, err = internal.GenerateACI22TopLayer(dockerURL, &imageConfig, parts[1], outputDir, layerFile, curPwl, compression, aciManifests)
		}
		if err != nil {
			return nil, nil, fmt.Errorf("error generating ACI: %v", err)
		}

		aciLayerPaths = append(aciLayerPaths, aciPath)
		aciManifests = append(aciManifests, manifest)
		curPwl = manifest.PathWhitelist
	}

	return aciLayerPaths, aciManifests, nil
}
Example #2
0
func (rb *RepositoryBackend) buildACIV22(layerIDs []string, dockerURL *common.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
	layerFiles := make([]*os.File, len(layerIDs))

	tmpParentDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
	if err != nil {
		return nil, nil, err
	}
	defer os.RemoveAll(tmpParentDir)

	copier := progressutil.NewCopyProgressPrinter()

	resultChan := make(chan layer, len(layerIDs))
	for i, layerID := range layerIDs {
		if err := common.ValidateLayerId(layerID); err != nil {
			return nil, nil, err
		}
		// https://github.com/golang/go/wiki/CommonMistakes
		i := i // golang--
		layerID := layerID
		go func() {
			tmpDir, err := ioutil.TempDir(tmpParentDir, "")
			if err != nil {
				resultChan <- layer{
					index: i,
					err:   fmt.Errorf("error creating dir: %v", err),
				}
				return
			}

			layerFile, closer, err := rb.getLayerV2(layerID, dockerURL, tmpDir, copier)
			if err != nil {
				resultChan <- layer{
					index: i,
					err:   fmt.Errorf("error getting the remote layer: %v", err),
				}
				return
			}
			resultChan <- layer{
				index:  i,
				file:   layerFile,
				closer: closer,
				err:    nil,
			}
		}()
	}
	var errs []error
	for i := 0; i < len(layerIDs); i++ {
		res := <-resultChan
		if res.closer != nil {
			defer res.closer.Close()
		}
		if res.file != nil {
			defer res.file.Close()
		}
		if res.err != nil {
			errs = append(errs, res.err)
		}
		layerFiles[res.index] = res.file
	}
	if len(errs) > 0 {
		return nil, nil, errs[0]
	}
	err = copier.PrintAndWait(os.Stderr, 500*time.Millisecond, nil)
	if err != nil {
		return nil, nil, err
	}
	for _, layerFile := range layerFiles {
		err := layerFile.Sync()
		if err != nil {
			return nil, nil, err
		}
	}
	var aciLayerPaths []string
	var aciManifests []*schema.ImageManifest
	var curPwl []string
	var i int
	for i = 0; i < len(layerIDs)-1; i++ {
		rb.debug.Println("Generating layer ACI...")
		aciPath, aciManifest, err := internal.GenerateACI22LowerLayer(dockerURL, layerIDs[i], outputDir, layerFiles[i], curPwl, compression)
		if err != nil {
			return nil, nil, fmt.Errorf("error generating ACI: %v", err)
		}
		aciLayerPaths = append(aciLayerPaths, aciPath)
		aciManifests = append(aciManifests, aciManifest)
		curPwl = aciManifest.PathWhitelist
	}
	rb.debug.Println("Generating layer ACI...")
	aciPath, aciManifest, err := internal.GenerateACI22TopLayer(dockerURL, rb.imageConfigs[*dockerURL], layerIDs[i], outputDir, layerFiles[i], curPwl, compression, aciManifests, rb.debug)
	if err != nil {
		return nil, nil, fmt.Errorf("error generating ACI: %v", err)
	}
	aciLayerPaths = append(aciLayerPaths, aciPath)
	aciManifests = append(aciManifests, aciManifest)

	return aciLayerPaths, aciManifests, nil
}