Ejemplo n.º 1
0
Archivo: file.go Proyecto: nhlfr/rkt
func (lb *FileBackend) BuildACI(layerIDs []string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
	if strings.Contains(layerIDs[0], ":") {
		return lb.BuildACIV22(layerIDs, dockerURL, outputDir, tmpBaseDir, compression)
	}
	var aciLayerPaths []string
	var aciManifests []*schema.ImageManifest
	var curPwl []string

	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-- {
		if err := common.ValidateLayerId(layerIDs[i]); err != nil {
			return nil, nil, err
		}
		j, err := getJson(lb.file, layerIDs[i])
		if err != nil {
			return nil, nil, fmt.Errorf("error getting layer json: %v", err)
		}

		layerData := types.DockerImageData{}
		if err := json.Unmarshal(j, &layerData); err != nil {
			return nil, nil, fmt.Errorf("error unmarshaling layer data: %v", err)
		}

		tmpLayerPath := path.Join(tmpDir, layerIDs[i])
		tmpLayerPath += ".tar"

		layerTarPath := path.Join(layerIDs[i], "layer.tar")
		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...")
		aciPath, manifest, err := internal.GenerateACI(i, layerData, dockerURL, outputDir, layerFile, curPwl, compression)
		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
}
Ejemplo n.º 2
0
func fixManifestLayers(manifest *v2Manifest) error {
	type imageV1 struct {
		ID     string
		Parent string
	}
	imgs := make([]*imageV1, len(manifest.FSLayers))
	for i := range manifest.FSLayers {
		img := &imageV1{}

		if err := json.Unmarshal([]byte(manifest.History[i].V1Compatibility), img); err != nil {
			return err
		}

		imgs[i] = img
		if err := common.ValidateLayerId(img.ID); err != nil {
			return err
		}
	}

	if imgs[len(imgs)-1].Parent != "" {
		return errors.New("Invalid parent ID in the base layer of the image.")
	}

	// check general duplicates to error instead of a deadlock
	idmap := make(map[string]struct{})

	var lastID string
	for _, img := range imgs {
		// skip IDs that appear after each other, we handle those later
		if _, exists := idmap[img.ID]; img.ID != lastID && exists {
			return fmt.Errorf("ID %+v appears multiple times in manifest", img.ID)
		}
		lastID = img.ID
		idmap[lastID] = struct{}{}
	}

	// backwards loop so that we keep the remaining indexes after removing items
	for i := len(imgs) - 2; i >= 0; i-- {
		if imgs[i].ID == imgs[i+1].ID { // repeated ID. remove and continue
			manifest.FSLayers = append(manifest.FSLayers[:i], manifest.FSLayers[i+1:]...)
			manifest.History = append(manifest.History[:i], manifest.History[i+1:]...)
		} else if imgs[i].Parent != imgs[i+1].ID {
			return fmt.Errorf("Invalid parent ID. Expected %v, got %v.", imgs[i+1].ID, imgs[i].Parent)
		}
	}

	return nil
}
Ejemplo n.º 3
0
func (rb *RepositoryBackend) buildACIV1(layerIDs []string, dockerURL *common.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
	layerFiles := make([]*os.File, len(layerIDs))
	layerDatas := make([]types.DockerImageData, len(layerIDs))

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

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

			j, size, err := rb.getJsonV1(layerID, rb.repoData.Endpoints[0], rb.repoData)
			if err != nil {
				doneChan <- fmt.Errorf("error getting image json: %v", err)
				return
			}

			layerDatas[i] = types.DockerImageData{}
			if err := json.Unmarshal(j, &layerDatas[i]); err != nil {
				doneChan <- fmt.Errorf("error unmarshaling layer data: %v", err)
				return
			}

			layerFiles[i], err = rb.getLayerV1(layerID, rb.repoData.Endpoints[0], rb.repoData, size, tmpDir)
			if err != nil {
				doneChan <- fmt.Errorf("error getting the remote layer: %v", err)
				return
			}
			doneChan <- nil
		}()
	}
	for _, doneChan := range doneChannels {
		err := <-doneChan
		if err != nil {
			return nil, nil, err
		}
	}
	var aciLayerPaths []string
	var aciManifests []*schema.ImageManifest
	var curPwl []string

	for i := len(layerIDs) - 1; i >= 0; i-- {
		rb.debug.Println("Generating layer ACI...")
		aciPath, manifest, err := internal.GenerateACI(i, layerDatas[i], dockerURL, outputDir, layerFiles[i], curPwl, compression, rb.debug)
		if err != nil {
			return nil, nil, fmt.Errorf("error generating ACI: %v", err)
		}
		aciLayerPaths = append(aciLayerPaths, aciPath)
		aciManifests = append(aciManifests, manifest)
		curPwl = manifest.PathWhitelist

		layerFiles[i].Close()
	}

	return aciLayerPaths, aciManifests, nil
}
Ejemplo n.º 4
0
func (rb *RepositoryBackend) buildACIV21(layerIDs []string, dockerURL *common.ParsedDockerURL, outputDir string, tmpBaseDir string, compression common.Compression) ([]string, []*schema.ImageManifest, error) {
	layerFiles := make([]*os.File, len(layerIDs))
	layerDatas := make([]types.DockerImageData, len(layerIDs))

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

	copier := progressutil.NewCopyProgressPrinter()

	var errChannels []chan error
	closers := make([]io.ReadCloser, len(layerIDs))
	var wg sync.WaitGroup
	for i, layerID := range layerIDs {
		if err := common.ValidateLayerId(layerID); err != nil {
			return nil, nil, err
		}
		wg.Add(1)
		errChan := make(chan error, 1)
		errChannels = append(errChannels, errChan)
		// https://github.com/golang/go/wiki/CommonMistakes
		i := i // golang--
		layerID := layerID
		go func() {
			defer wg.Done()

			manifest := rb.imageManifests[*dockerURL]

			layerIndex, ok := rb.layersIndex[layerID]
			if !ok {
				errChan <- fmt.Errorf("layer not found in manifest: %s", layerID)
				return
			}

			if len(manifest.History) <= layerIndex {
				errChan <- fmt.Errorf("history not found for layer %s", layerID)
				return
			}

			layerDatas[i] = types.DockerImageData{}
			if err := json.Unmarshal([]byte(manifest.History[layerIndex].V1Compatibility), &layerDatas[i]); err != nil {
				errChan <- fmt.Errorf("error unmarshaling layer data: %v", err)
				return
			}

			tmpDir, err := ioutil.TempDir(tmpParentDir, "")
			if err != nil {
				errChan <- fmt.Errorf("error creating dir: %v", err)
				return
			}

			layerFiles[i], closers[i], err = rb.getLayerV2(layerID, dockerURL, tmpDir, copier)
			if err != nil {
				errChan <- fmt.Errorf("error getting the remote layer: %v", err)
				return
			}
			errChan <- nil
		}()
	}
	// Need to wait for all of the readers to be added to the copier (which happens during rb.getLayerV2)
	wg.Wait()
	err = copier.PrintAndWait(os.Stderr, 500*time.Millisecond, nil)
	if err != nil {
		return nil, nil, err
	}
	for _, closer := range closers {
		if closer != nil {
			closer.Close()
		}
	}
	for _, errChan := range errChannels {
		err := <-errChan
		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
	for i := len(layerIDs) - 1; i >= 0; i-- {
		rb.debug.Println("Generating layer ACI...")
		aciPath, aciManifest, err := internal.GenerateACI(i, layerDatas[i], dockerURL, outputDir, layerFiles[i], curPwl, compression, rb.debug)
		if err != nil {
			return nil, nil, fmt.Errorf("error generating ACI: %v", err)
		}
		aciLayerPaths = append(aciLayerPaths, aciPath)
		aciManifests = append(aciManifests, aciManifest)
		curPwl = aciManifest.PathWhitelist

		layerFiles[i].Close()
	}

	return aciLayerPaths, aciManifests, nil
}
Ejemplo n.º 5
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
}