func (lb *FileBackend) BuildACI(layerNumber int, layerID string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, curPwl []string, compression common.Compression) (string, *schema.ImageManifest, error) {
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
j, err := getJson(lb.file, layerID)
if err != nil {
return "", nil, fmt.Errorf("error getting image json: %v", err)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal(j, &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
tmpLayerPath := path.Join(tmpDir, layerID)
tmpLayerPath += ".tar"
layerFile, err := extractEmbeddedLayer(lb.file, layerID, tmpLayerPath)
if err != nil {
return "", nil, fmt.Errorf("error getting layer from file: %v", err)
}
defer layerFile.Close()
log.Debug("Generating layer ACI...")
aciPath, manifest, err := internal.GenerateACI(layerNumber, layerData, dockerURL, outputDir, layerFile, curPwl, compression)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, manifest, nil
}
func (rb *RepositoryBackend) buildACIV1(layerNumber int, layerID string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, curPwl []string, compression common.Compression) (string, *schema.ImageManifest, error) {
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
j, size, err := rb.getJsonV1(layerID, rb.repoData.Endpoints[0], rb.repoData)
if err != nil {
return "", nil, fmt.Errorf("error getting image json: %v", err)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal(j, &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
layerFile, err := rb.getLayerV1(layerID, rb.repoData.Endpoints[0], rb.repoData, size, tmpDir)
if err != nil {
return "", nil, fmt.Errorf("error getting the remote layer: %v", err)
}
defer layerFile.Close()
log.Debug("Generating layer ACI...")
aciPath, manifest, err := internal.GenerateACI(layerNumber, layerData, dockerURL, outputDir, layerFile, curPwl, compression)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, manifest, nil
}
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
}
func (rb *RepositoryBackend) buildACIV2(layerNumber int, layerID string, dockerURL *types.ParsedDockerURL, outputDir string, tmpBaseDir string, curPwl []string, compression common.Compression) (string, *schema.ImageManifest, error) {
manifest := rb.imageManifests[*dockerURL]
layerIndex, err := getLayerIndex(layerID, manifest)
if err != nil {
return "", nil, err
}
if len(manifest.History) <= layerIndex {
return "", nil, fmt.Errorf("history not found for layer %s", layerID)
}
layerData := types.DockerImageData{}
if err := json.Unmarshal([]byte(manifest.History[layerIndex].V1Compatibility), &layerData); err != nil {
return "", nil, fmt.Errorf("error unmarshaling layer data: %v", err)
}
tmpDir, err := ioutil.TempDir(tmpBaseDir, "docker2aci-")
if err != nil {
return "", nil, fmt.Errorf("error creating dir: %v", err)
}
defer os.RemoveAll(tmpDir)
layerFile, err := rb.getLayerV2(layerID, dockerURL, tmpDir)
if err != nil {
return "", nil, fmt.Errorf("error getting the remote layer: %v", err)
}
defer layerFile.Close()
log.Debug("Generating layer ACI...")
aciPath, aciManifest, err := internal.GenerateACI(layerNumber, layerData, dockerURL, outputDir, layerFile, curPwl, compression)
if err != nil {
return "", nil, fmt.Errorf("error generating ACI: %v", err)
}
return aciPath, aciManifest, nil
}
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
}
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
}