func blockDumpAction(cmd *cobra.Command, args []string) error {
if len(args) != 2 {
return torus.ErrUsage
}
output, err := getWriterFromArg(args[1])
if err != nil {
return fmt.Errorf("couldn't open output: %v", err)
}
srv := createServer()
defer srv.Close()
blockvol, err := block.OpenBlockVolume(srv, args[0])
if err != nil {
return fmt.Errorf("couldn't open block volume %s: %v", args[0], err)
}
tempsnap := fmt.Sprintf("temp-dump-%d", os.Getpid())
err = blockvol.SaveSnapshot(tempsnap)
if err != nil {
return fmt.Errorf("couldn't snapshot: %v", err)
}
bf, err := blockvol.OpenSnapshot(tempsnap)
if err != nil {
return fmt.Errorf("couldn't open snapshot: %v", err)
}
size := int64(bf.Size())
if progress {
pb := progressutil.NewCopyProgressPrinter()
pb.AddCopy(bf, path.Base(args[0]), size, output)
err := pb.PrintAndWait(os.Stderr, 500*time.Millisecond, nil)
if err != nil {
return fmt.Errorf("couldn't copy: %v", err)
}
} else {
n, err := io.Copy(output, bf)
if err != nil {
return fmt.Errorf("couldn't copy: %v", err)
}
if n != size {
return fmt.Errorf("short read of %q", args[0])
}
}
err = blockvol.DeleteSnapshot(tempsnap)
if err != nil {
return fmt.Errorf("couldn't delete snapshot: %v", err)
}
fmt.Printf("copied %d bytes\n", size)
return 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
}
func blockLoadAction(cmd *cobra.Command, args []string) error {
if len(args) != 2 && len(args) != 3 {
return torus.ErrUsage
}
input, err := getReaderFromArg(args[0])
if err != nil {
return fmt.Errorf("couldn't open input: %v", err)
}
srv := createServer()
defer srv.Close()
fi, err := input.Stat()
if err != nil {
return fmt.Errorf("couldn't stat input file: %v", err)
}
size := uint64(fi.Size())
if len(args) == 3 {
expSize, err := humanize.ParseBytes(args[2])
if err != nil {
return fmt.Errorf("error parsing size %s: %v", args[2], err)
}
if expSize < size {
return fmt.Errorf("size must be larger than input file")
}
size = expSize
}
err = block.CreateBlockVolume(srv.MDS, args[1], size)
if err != nil {
return fmt.Errorf("couldn't create block volume %s: %v", args[1], err)
}
blockvol, err := block.OpenBlockVolume(srv, args[1])
if err != nil {
return fmt.Errorf("couldn't open block volume %s: %v", args[1], err)
}
f, err := blockvol.OpenBlockFile()
if err != nil {
return fmt.Errorf("couldn't open blockfile %s: %v", args[1], err)
}
defer f.Close()
if progress {
pb := progressutil.NewCopyProgressPrinter()
pb.AddCopy(input, path.Base(args[0]), fi.Size(), f)
err := pb.PrintAndWait(os.Stderr, 500*time.Millisecond, nil)
if err != nil {
return fmt.Errorf("couldn't copy: %v", err)
}
} else {
_, err := io.Copy(f, input)
if err != nil {
return fmt.Errorf("couldn't copy: %v", err)
}
}
err = f.Sync()
if err != nil {
return fmt.Errorf("couldn't sync: %v", err)
}
fmt.Printf("copied %d bytes\n", fi.Size())
return nil
}
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
}
