func (s *TagStore) pushImage(r *registry.Session, out io.Writer, imgID, ep string, token []string, sf *utils.StreamFormatter) (checksum string, err error) {
out = utils.NewWriteFlusher(out)
jsonRaw, err := ioutil.ReadFile(path.Join(s.graph.Root, imgID, "json"))
if err != nil {
return "", fmt.Errorf("Cannot retrieve the path for {%s}: %s", imgID, err)
}
out.Write(sf.FormatProgress(common.TruncateID(imgID), "Pushing", nil))
imgData := ®istry.ImgData{
ID: imgID,
}
// Send the json
if err := r.PushImageJSONRegistry(imgData, jsonRaw, ep, token); err != nil {
if err == registry.ErrAlreadyExists {
out.Write(sf.FormatProgress(common.TruncateID(imgData.ID), "Image already pushed, skipping", nil))
return "", nil
}
return "", err
}
layerData, err := s.graph.TempLayerArchive(imgID, sf, out)
if err != nil {
return "", fmt.Errorf("Failed to generate layer archive: %s", err)
}
defer os.RemoveAll(layerData.Name())
// Send the layer
log.Debugf("rendered layer for %s of [%d] size", imgData.ID, layerData.Size)
checksum, checksumPayload, err := r.PushImageLayerRegistry(imgData.ID,
progressreader.New(progressreader.Config{
In: layerData,
Out: out,
Formatter: sf,
Size: int(layerData.Size),
NewLines: false,
ID: common.TruncateID(imgData.ID),
Action: "Pushing",
}), ep, token, jsonRaw)
if err != nil {
return "", err
}
imgData.Checksum = checksum
imgData.ChecksumPayload = checksumPayload
// Send the checksum
if err := r.PushImageChecksumRegistry(imgData, ep, token); err != nil {
return "", err
}
out.Write(sf.FormatProgress(common.TruncateID(imgData.ID), "Image successfully pushed", nil))
return imgData.Checksum, nil
}
// PushV2Image pushes the image content to the v2 registry, first buffering the contents to disk
func (s *TagStore) pushV2Image(r *registry.Session, img *image.Image, endpoint *registry.Endpoint, imageName string, sf *utils.StreamFormatter, out io.Writer, auth *registry.RequestAuthorization) (string, error) {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Buffering to Disk", nil))
image, err := s.graph.Get(img.ID)
if err != nil {
return "", err
}
arch, err := image.TarLayer()
if err != nil {
return "", err
}
defer arch.Close()
tf, err := s.graph.newTempFile()
if err != nil {
return "", err
}
defer func() {
tf.Close()
os.Remove(tf.Name())
}()
h := sha256.New()
size, err := bufferToFile(tf, io.TeeReader(arch, h))
if err != nil {
return "", err
}
dgst := digest.NewDigest("sha256", h)
// Send the layer
log.Debugf("rendered layer for %s of [%d] size", img.ID, size)
if err := r.PutV2ImageBlob(endpoint, imageName, dgst.Algorithm(), dgst.Hex(),
progressreader.New(progressreader.Config{
In: tf,
Out: out,
Formatter: sf,
Size: int(size),
NewLines: false,
ID: common.TruncateID(img.ID),
Action: "Pushing",
}), auth); err != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image push failed", nil))
return "", err
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image successfully pushed", nil))
return dgst.String(), nil
}
// Run the builder with the context. This is the lynchpin of this package. This
// will (barring errors):
//
// * call readContext() which will set up the temporary directory and unpack
// the context into it.
// * read the dockerfile
// * parse the dockerfile
// * walk the parse tree and execute it by dispatching to handlers. If Remove
// or ForceRemove is set, additional cleanup around containers happens after
// processing.
// * Print a happy message and return the image ID.
//
func (b *Builder) Run(context io.Reader) (string, error) {
if err := b.readContext(context); err != nil {
return "", err
}
defer func() {
if err := os.RemoveAll(b.contextPath); err != nil {
log.Debugf("[BUILDER] failed to remove temporary context: %s", err)
}
}()
if err := b.readDockerfile(); err != nil {
return "", err
}
// some initializations that would not have been supplied by the caller.
b.Config = &runconfig.Config{}
b.TmpContainers = map[string]struct{}{}
for i, n := range b.dockerfile.Children {
select {
case <-b.cancelled:
log.Debug("Builder: build cancelled!")
fmt.Fprintf(b.OutStream, "Build cancelled")
return "", fmt.Errorf("Build cancelled")
default:
// Not cancelled yet, keep going...
}
if err := b.dispatch(i, n); err != nil {
if b.ForceRemove {
b.clearTmp()
}
return "", err
}
fmt.Fprintf(b.OutStream, " ---> %s\n", common.TruncateID(b.image))
if b.Remove {
b.clearTmp()
}
}
if b.image == "" {
return "", fmt.Errorf("No image was generated. Is your Dockerfile empty?")
}
fmt.Fprintf(b.OutStream, "Successfully built %s\n", common.TruncateID(b.image))
return b.image, nil
}
// shouldRestart checks the restart policy and applies the rules to determine if
// the container's process should be restarted
func (m *containerMonitor) shouldRestart(exitCode int) bool {
m.mux.Lock()
defer m.mux.Unlock()
// do not restart if the user or docker has requested that this container be stopped
if m.shouldStop {
return false
}
switch m.restartPolicy.Name {
case "always":
return true
case "on-failure":
// the default value of 0 for MaximumRetryCount means that we will not enforce a maximum count
if max := m.restartPolicy.MaximumRetryCount; max != 0 && m.failureCount > max {
log.Debugf("stopping restart of container %s because maximum failure could of %d has been reached",
common.TruncateID(m.container.ID), max)
return false
}
return exitCode != 0
}
return false
}
func (daemon *Daemon) reserveName(id, name string) (string, error) {
if !validContainerNamePattern.MatchString(name) {
return "", fmt.Errorf("Invalid container name (%s), only %s are allowed", name, validContainerNameChars)
}
if name[0] != '/' {
name = "/" + name
}
if _, err := daemon.containerGraph.Set(name, id); err != nil {
if !graphdb.IsNonUniqueNameError(err) {
return "", err
}
conflictingContainer, err := daemon.GetByName(name)
if err != nil {
if strings.Contains(err.Error(), "Could not find entity") {
return "", err
}
// Remove name and continue starting the container
if err := daemon.containerGraph.Delete(name); err != nil {
return "", err
}
} else {
nameAsKnownByUser := strings.TrimPrefix(name, "/")
return "", fmt.Errorf(
"Conflict. The name %q is already in use by container %s. You have to delete (or rename) that container to be able to reuse that name.", nameAsKnownByUser,
common.TruncateID(conflictingContainer.ID))
}
}
return name, nil
}
func (b *Builder) clearTmp() {
for c := range b.TmpContainers {
tmp, err := b.Daemon.Get(c)
if err != nil {
fmt.Fprint(b.OutStream, err.Error())
}
if err := b.Daemon.Rm(tmp); err != nil {
fmt.Fprintf(b.OutStream, "Error removing intermediate container %s: %s\n", common.TruncateID(c), err.Error())
return
}
b.Daemon.DeleteVolumes(tmp.VolumePaths())
delete(b.TmpContainers, c)
fmt.Fprintf(b.OutStream, "Removing intermediate container %s\n", common.TruncateID(c))
}
}
func (b *Builder) create() (*daemon.Container, error) {
if b.image == "" && !b.noBaseImage {
return nil, fmt.Errorf("Please provide a source image with `from` prior to run")
}
b.Config.Image = b.image
config := *b.Config
// Create the container
c, warnings, err := b.Daemon.Create(b.Config, nil, "")
if err != nil {
return nil, err
}
for _, warning := range warnings {
fmt.Fprintf(b.OutStream, " ---> [Warning] %s\n", warning)
}
b.TmpContainers[c.ID] = struct{}{}
fmt.Fprintf(b.OutStream, " ---> Running in %s\n", common.TruncateID(c.ID))
if len(config.Cmd) > 0 {
// override the entry point that may have been picked up from the base image
c.Path = config.Cmd[0]
c.Args = config.Cmd[1:]
} else {
config.Cmd = []string{}
}
return c, nil
}
// TempLayerArchive creates a temporary archive of the given image's filesystem layer.
// The archive is stored on disk and will be automatically deleted as soon as has been read.
// If output is not nil, a human-readable progress bar will be written to it.
// FIXME: does this belong in Graph? How about MktempFile, let the caller use it for archives?
func (graph *Graph) TempLayerArchive(id string, sf *utils.StreamFormatter, output io.Writer) (*archive.TempArchive, error) {
image, err := graph.Get(id)
if err != nil {
return nil, err
}
tmp, err := graph.Mktemp("")
if err != nil {
return nil, err
}
a, err := image.TarLayer()
if err != nil {
return nil, err
}
progressReader := progressreader.New(progressreader.Config{
In: a,
Out: output,
Formatter: sf,
Size: 0,
NewLines: false,
ID: common.TruncateID(id),
Action: "Buffering to disk",
})
defer progressReader.Close()
return archive.NewTempArchive(progressReader, tmp)
}
// Test that an image can be deleted by its shorthand prefix
func TestDeletePrefix(t *testing.T) {
graph, _ := tempGraph(t)
defer nukeGraph(graph)
img := createTestImage(graph, t)
if err := graph.Delete(common.TruncateID(img.ID)); err != nil {
t.Fatal(err)
}
assertNImages(graph, t, 0)
}
func (s *TagStore) pushImageToEndpoint(endpoint string, out io.Writer, remoteName string, imageIDs []string,
tags map[string][]string, repo *registry.RepositoryData, sf *utils.StreamFormatter, r *registry.Session) error {
workerCount := len(imageIDs)
// start a maximum of 5 workers to check if images exist on the specified endpoint.
if workerCount > 5 {
workerCount = 5
}
var (
wg = &sync.WaitGroup{}
imageData = make(chan imagePushData, workerCount*2)
imagesToPush = make(chan string, workerCount*2)
pushes = make(chan map[string]struct{}, 1)
)
for i := 0; i < workerCount; i++ {
wg.Add(1)
go lookupImageOnEndpoint(wg, r, out, sf, imageData, imagesToPush)
}
// start a go routine that consumes the images to push
go func() {
shouldPush := make(map[string]struct{})
for id := range imagesToPush {
shouldPush[id] = struct{}{}
}
pushes <- shouldPush
}()
for _, id := range imageIDs {
imageData <- imagePushData{
id: id,
endpoint: endpoint,
tokens: repo.Tokens,
}
}
// close the channel to notify the workers that there will be no more images to check.
close(imageData)
wg.Wait()
close(imagesToPush)
// wait for all the images that require pushes to be collected into a consumable map.
shouldPush := <-pushes
// finish by pushing any images and tags to the endpoint. The order that the images are pushed
// is very important that is why we are still iterating over the ordered list of imageIDs.
for _, id := range imageIDs {
if _, push := shouldPush[id]; push {
if _, err := s.pushImage(r, out, id, endpoint, repo.Tokens, sf); err != nil {
// FIXME: Continue on error?
return err
}
}
for _, tag := range tags[id] {
out.Write(sf.FormatStatus("", "Pushing tag for rev [%s] on {%s}", common.TruncateID(id), endpoint+"repositories/"+remoteName+"/tags/"+tag))
if err := r.PushRegistryTag(remoteName, id, tag, endpoint, repo.Tokens); err != nil {
return err
}
}
}
return nil
}
// lookupImageOnEndpoint checks the specified endpoint to see if an image exists
// and if it is absent then it sends the image id to the channel to be pushed.
func lookupImageOnEndpoint(wg *sync.WaitGroup, r *registry.Session, out io.Writer, sf *utils.StreamFormatter,
images chan imagePushData, imagesToPush chan string) {
defer wg.Done()
for image := range images {
if err := r.LookupRemoteImage(image.id, image.endpoint, image.tokens); err != nil {
log.Errorf("Error in LookupRemoteImage: %s", err)
imagesToPush <- image.id
continue
}
out.Write(sf.FormatStatus("", "Image %s already pushed, skipping", common.TruncateID(image.id)))
}
}
func (store *TagStore) GetRepoRefs() map[string][]string {
store.Lock()
reporefs := make(map[string][]string)
for name, repository := range store.Repositories {
for tag, id := range repository {
shortID := common.TruncateID(id)
reporefs[shortID] = append(reporefs[shortID], utils.ImageReference(name, tag))
}
}
store.Unlock()
return reporefs
}
// During cleanup aufs needs to unmount all mountpoints
func (a *Driver) Cleanup() error {
ids, err := loadIds(path.Join(a.rootPath(), "layers"))
if err != nil {
return err
}
for _, id := range ids {
if err := a.unmount(id); err != nil {
log.Errorf("Unmounting %s: %s", common.TruncateID(id), err)
}
}
return mountpk.Unmount(a.root)
}
// PushV2Image pushes the image content to the v2 registry, first buffering the contents to disk
func (s *TagStore) pushV2Image(r *registry.Session, img *image.Image, endpoint *registry.Endpoint, imageName, sumType, sumStr string, sf *utils.StreamFormatter, out io.Writer, auth *registry.RequestAuthorization) error {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Buffering to Disk", nil))
image, err := s.graph.Get(img.ID)
if err != nil {
return err
}
arch, err := image.TarLayer()
if err != nil {
return err
}
defer arch.Close()
tf, err := s.graph.newTempFile()
if err != nil {
return err
}
defer func() {
tf.Close()
os.Remove(tf.Name())
}()
size, err := bufferToFile(tf, arch)
if err != nil {
return err
}
// Send the layer
log.Debugf("rendered layer for %s of [%d] size", img.ID, size)
if err := r.PutV2ImageBlob(endpoint, imageName, sumType, sumStr, utils.ProgressReader(tf, int(size), out, sf, false, common.TruncateID(img.ID), "Pushing"), auth); err != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image push failed", nil))
return err
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image successfully pushed", nil))
return nil
}
// TempLayerArchive creates a temporary archive of the given image's filesystem layer.
// The archive is stored on disk and will be automatically deleted as soon as has been read.
// If output is not nil, a human-readable progress bar will be written to it.
// FIXME: does this belong in Graph? How about MktempFile, let the caller use it for archives?
func (graph *Graph) TempLayerArchive(id string, sf *utils.StreamFormatter, output io.Writer) (*archive.TempArchive, error) {
image, err := graph.Get(id)
if err != nil {
return nil, err
}
tmp, err := graph.Mktemp("")
if err != nil {
return nil, err
}
a, err := image.TarLayer()
if err != nil {
return nil, err
}
progress := utils.ProgressReader(a, 0, output, sf, false, common.TruncateID(id), "Buffering to disk")
defer progress.Close()
return archive.NewTempArchive(progress, tmp)
}
func TestImagesEnsureDanglingImageOnlyListedOnce(t *testing.T) {
defer deleteAllContainers()
// create container 1
c := exec.Command(dockerBinary, "run", "-d", "busybox", "true")
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error running busybox: %s, %v", out, err)
}
containerId1 := strings.TrimSpace(out)
// tag as foobox
c = exec.Command(dockerBinary, "commit", containerId1, "foobox")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error tagging foobox: %s", err)
}
imageId := common.TruncateID(strings.TrimSpace(out))
defer deleteImages(imageId)
// overwrite the tag, making the previous image dangling
c = exec.Command(dockerBinary, "tag", "-f", "busybox", "foobox")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error tagging foobox: %s", err)
}
defer deleteImages("foobox")
c = exec.Command(dockerBinary, "images", "-q", "-f", "dangling=true")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("listing images failed with errors: %s, %v", out, err)
}
if e, a := 1, strings.Count(out, imageId); e != a {
t.Fatalf("expected 1 dangling image, got %d: %s", a, out)
}
logDone("images - dangling image only listed once")
}
func (daemon *Daemon) generateNewName(id string) (string, error) {
var name string
for i := 0; i < 6; i++ {
name = namesgenerator.GetRandomName(i)
if name[0] != '/' {
name = "/" + name
}
if _, err := daemon.containerGraph.Set(name, id); err != nil {
if !graphdb.IsNonUniqueNameError(err) {
return "", err
}
continue
}
return name, nil
}
name = "/" + common.TruncateID(id)
if _, err := daemon.containerGraph.Set(name, id); err != nil {
return "", err
}
return name, nil
}
// TestAttachDetachTruncatedID checks that attach in tty mode can be detached
func TestAttachDetachTruncatedID(t *testing.T) {
stdout, stdoutPipe := io.Pipe()
cpty, tty, err := pty.Open()
if err != nil {
t.Fatal(err)
}
cli := client.NewDockerCli(tty, stdoutPipe, ioutil.Discard, "", testDaemonProto, testDaemonAddr, nil)
defer cleanup(globalEngine, t)
// Discard the CmdRun output
go stdout.Read(make([]byte, 1024))
setTimeout(t, "Starting container timed out", 2*time.Second, func() {
if err := cli.CmdRun("-i", "-t", "-d", unitTestImageID, "cat"); err != nil {
t.Fatal(err)
}
})
container := waitContainerStart(t, 10*time.Second)
state := setRaw(t, container)
defer unsetRaw(t, container, state)
stdout, stdoutPipe = io.Pipe()
cpty, tty, err = pty.Open()
if err != nil {
t.Fatal(err)
}
cli = client.NewDockerCli(tty, stdoutPipe, ioutil.Discard, "", testDaemonProto, testDaemonAddr, nil)
ch := make(chan struct{})
go func() {
defer close(ch)
if err := cli.CmdAttach(common.TruncateID(container.ID)); err != nil {
if err != io.ErrClosedPipe {
t.Fatal(err)
}
}
}()
setTimeout(t, "First read/write assertion timed out", 2*time.Second, func() {
if err := assertPipe("hello\n", "hello", stdout, cpty, 150); err != nil {
if err != io.ErrClosedPipe {
t.Fatal(err)
}
}
})
setTimeout(t, "Escape sequence timeout", 5*time.Second, func() {
cpty.Write([]byte{16})
time.Sleep(100 * time.Millisecond)
cpty.Write([]byte{17})
})
// wait for CmdRun to return
setTimeout(t, "Waiting for CmdAttach timed out", 15*time.Second, func() {
<-ch
})
closeWrap(cpty, stdout, stdoutPipe)
time.Sleep(500 * time.Millisecond)
if !container.IsRunning() {
t.Fatal("The detached container should be still running")
}
setTimeout(t, "Waiting for container to die timedout", 5*time.Second, func() {
container.Kill()
})
}
func (s *TagStore) pushV2Repository(r *registry.Session, eng *engine.Engine, out io.Writer, repoInfo *registry.RepositoryInfo, tag string, sf *utils.StreamFormatter) error {
if repoInfo.Official {
j := eng.Job("trust_update_base")
if err := j.Run(); err != nil {
log.Errorf("error updating trust base graph: %s", err)
}
}
endpoint, err := r.V2RegistryEndpoint(repoInfo.Index)
if err != nil {
if repoInfo.Index.Official {
log.Debugf("Unable to push to V2 registry, falling back to v1: %s", err)
return ErrV2RegistryUnavailable
}
return fmt.Errorf("error getting registry endpoint: %s", err)
}
tags, err := s.getImageTags(repoInfo.LocalName, tag)
if err != nil {
return err
}
if len(tags) == 0 {
return fmt.Errorf("No tags to push for %s", repoInfo.LocalName)
}
auth, err := r.GetV2Authorization(endpoint, repoInfo.RemoteName, false)
if err != nil {
return fmt.Errorf("error getting authorization: %s", err)
}
for _, tag := range tags {
log.Debugf("Pushing %s:%s to v2 repository", repoInfo.LocalName, tag)
mBytes, err := s.newManifest(repoInfo.LocalName, repoInfo.RemoteName, tag)
if err != nil {
return err
}
js, err := libtrust.NewJSONSignature(mBytes)
if err != nil {
return err
}
if err = js.Sign(s.trustKey); err != nil {
return err
}
signedBody, err := js.PrettySignature("signatures")
if err != nil {
return err
}
log.Infof("Signed manifest for %s:%s using daemon's key: %s", repoInfo.LocalName, tag, s.trustKey.KeyID())
manifestBytes := string(signedBody)
manifest, verified, err := s.loadManifest(eng, signedBody)
if err != nil {
return fmt.Errorf("error verifying manifest: %s", err)
}
if err := checkValidManifest(manifest); err != nil {
return fmt.Errorf("invalid manifest: %s", err)
}
if verified {
log.Infof("Pushing verified image, key %s is registered for %q", s.trustKey.KeyID(), repoInfo.RemoteName)
}
for i := len(manifest.FSLayers) - 1; i >= 0; i-- {
var (
sumStr = manifest.FSLayers[i].BlobSum
imgJSON = []byte(manifest.History[i].V1Compatibility)
)
sumParts := strings.SplitN(sumStr, ":", 2)
if len(sumParts) < 2 {
return fmt.Errorf("Invalid checksum: %s", sumStr)
}
manifestSum := sumParts[1]
img, err := image.NewImgJSON(imgJSON)
if err != nil {
return fmt.Errorf("Failed to parse json: %s", err)
}
// Call mount blob
exists, err := r.HeadV2ImageBlob(endpoint, repoInfo.RemoteName, sumParts[0], manifestSum, auth)
if err != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image push failed", nil))
return err
}
if !exists {
if err := s.pushV2Image(r, img, endpoint, repoInfo.RemoteName, sumParts[0], manifestSum, sf, out, auth); err != nil {
return err
}
} else {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Image already exists", nil))
}
}
// push the manifest
if err := r.PutV2ImageManifest(endpoint, repoInfo.RemoteName, tag, bytes.NewReader([]byte(manifestBytes)), auth); err != nil {
return err
}
}
return nil
}
func TestDaemonCreate(t *testing.T) {
daemon := mkDaemon(t)
defer nuke(daemon)
// Make sure we start we 0 containers
if len(daemon.List()) != 0 {
t.Errorf("Expected 0 containers, %v found", len(daemon.List()))
}
container, _, err := daemon.Create(&runconfig.Config{
Image: GetTestImage(daemon).ID,
Cmd: []string{"ls", "-al"},
},
&runconfig.HostConfig{},
"",
)
if err != nil {
t.Fatal(err)
}
defer func() {
if err := daemon.Rm(container); err != nil {
t.Error(err)
}
}()
// Make sure we can find the newly created container with List()
if len(daemon.List()) != 1 {
t.Errorf("Expected 1 container, %v found", len(daemon.List()))
}
// Make sure the container List() returns is the right one
if daemon.List()[0].ID != container.ID {
t.Errorf("Unexpected container %v returned by List", daemon.List()[0])
}
// Make sure we can get the container with Get()
if _, err := daemon.Get(container.ID); err != nil {
t.Errorf("Unable to get newly created container")
}
// Make sure it is the right container
if c, _ := daemon.Get(container.ID); c != container {
t.Errorf("Get() returned the wrong container")
}
// Make sure Exists returns it as existing
if !daemon.Exists(container.ID) {
t.Errorf("Exists() returned false for a newly created container")
}
// Test that conflict error displays correct details
testContainer, _, _ := daemon.Create(
&runconfig.Config{
Image: GetTestImage(daemon).ID,
Cmd: []string{"ls", "-al"},
},
&runconfig.HostConfig{},
"conflictname",
)
if _, _, err := daemon.Create(&runconfig.Config{Image: GetTestImage(daemon).ID, Cmd: []string{"ls", "-al"}}, &runconfig.HostConfig{}, testContainer.Name); err == nil || !strings.Contains(err.Error(), common.TruncateID(testContainer.ID)) {
t.Fatalf("Name conflict error doesn't include the correct short id. Message was: %v", err)
}
// Make sure create with bad parameters returns an error
if _, _, err = daemon.Create(&runconfig.Config{Image: GetTestImage(daemon).ID}, &runconfig.HostConfig{}, ""); err == nil {
t.Fatal("Builder.Create should throw an error when Cmd is missing")
}
if _, _, err := daemon.Create(
&runconfig.Config{
Image: GetTestImage(daemon).ID,
Cmd: []string{},
},
&runconfig.HostConfig{},
"",
); err == nil {
t.Fatal("Builder.Create should throw an error when Cmd is empty")
}
config := &runconfig.Config{
Image: GetTestImage(daemon).ID,
Cmd: []string{"/bin/ls"},
PortSpecs: []string{"80"},
}
container, _, err = daemon.Create(config, &runconfig.HostConfig{}, "")
_, err = daemon.Commit(container, "testrepo", "testtag", "", "", true, config)
if err != nil {
t.Error(err)
}
// test expose 80:8000
container, warnings, err := daemon.Create(&runconfig.Config{
Image: GetTestImage(daemon).ID,
Cmd: []string{"ls", "-al"},
PortSpecs: []string{"80:8000"},
},
&runconfig.HostConfig{},
"",
)
if err != nil {
t.Fatal(err)
}
if warnings == nil || len(warnings) != 1 {
t.Error("Expected a warning, got none")
}
}
func (daemon *Daemon) canDeleteImage(imgID string, force bool) error {
for _, container := range daemon.List() {
parent, err := daemon.Repositories().LookupImage(container.ImageID)
if err != nil {
if daemon.Graph().IsNotExist(err) {
return nil
}
return err
}
if err := parent.WalkHistory(func(p *image.Image) error {
if imgID == p.ID {
if container.IsRunning() {
if force {
return fmt.Errorf("Conflict, cannot force delete %s because the running container %s is using it, stop it and retry", common.TruncateID(imgID), common.TruncateID(container.ID))
}
return fmt.Errorf("Conflict, cannot delete %s because the running container %s is using it, stop it and use -f to force", common.TruncateID(imgID), common.TruncateID(container.ID))
} else if !force {
return fmt.Errorf("Conflict, cannot delete %s because the container %s is using it, use -f to force", common.TruncateID(imgID), common.TruncateID(container.ID))
}
}
return nil
}); err != nil {
return err
}
}
return nil
}
func (s *TagStore) pushV2Repository(r *registry.Session, localRepo Repository, out io.Writer, repoInfo *registry.RepositoryInfo, tag string, sf *utils.StreamFormatter) error {
endpoint, err := r.V2RegistryEndpoint(repoInfo.Index)
if err != nil {
if repoInfo.Index.Official {
log.Debugf("Unable to push to V2 registry, falling back to v1: %s", err)
return ErrV2RegistryUnavailable
}
return fmt.Errorf("error getting registry endpoint: %s", err)
}
tags, err := s.getImageTags(localRepo, tag)
if err != nil {
return err
}
if len(tags) == 0 {
return fmt.Errorf("No tags to push for %s", repoInfo.LocalName)
}
auth, err := r.GetV2Authorization(endpoint, repoInfo.RemoteName, false)
if err != nil {
return fmt.Errorf("error getting authorization: %s", err)
}
for _, tag := range tags {
log.Debugf("Pushing repository: %s:%s", repoInfo.CanonicalName, tag)
layerId, exists := localRepo[tag]
if !exists {
return fmt.Errorf("tag does not exist: %s", tag)
}
layer, err := s.graph.Get(layerId)
if err != nil {
return err
}
m := ®istry.ManifestData{
SchemaVersion: 1,
Name: repoInfo.RemoteName,
Tag: tag,
Architecture: layer.Architecture,
}
var metadata runconfig.Config
if layer.Config != nil {
metadata = *layer.Config
}
layersSeen := make(map[string]bool)
layers := []*image.Image{layer}
for ; layer != nil; layer, err = layer.GetParent() {
if err != nil {
return err
}
if layersSeen[layer.ID] {
break
}
layers = append(layers, layer)
layersSeen[layer.ID] = true
}
m.FSLayers = make([]*registry.FSLayer, len(layers))
m.History = make([]*registry.ManifestHistory, len(layers))
// Schema version 1 requires layer ordering from top to root
for i, layer := range layers {
log.Debugf("Pushing layer: %s", layer.ID)
if layer.Config != nil && metadata.Image != layer.ID {
err = runconfig.Merge(&metadata, layer.Config)
if err != nil {
return err
}
}
jsonData, err := layer.RawJson()
if err != nil {
return fmt.Errorf("cannot retrieve the path for %s: %s", layer.ID, err)
}
checksum, err := layer.GetCheckSum(s.graph.ImageRoot(layer.ID))
if err != nil {
return fmt.Errorf("error getting image checksum: %s", err)
}
var exists bool
if len(checksum) > 0 {
sumParts := strings.SplitN(checksum, ":", 2)
if len(sumParts) < 2 {
return fmt.Errorf("Invalid checksum: %s", checksum)
}
// Call mount blob
exists, err = r.HeadV2ImageBlob(endpoint, repoInfo.RemoteName, sumParts[0], sumParts[1], auth)
if err != nil {
out.Write(sf.FormatProgress(common.TruncateID(layer.ID), "Image push failed", nil))
return err
}
}
if !exists {
if cs, err := s.pushV2Image(r, layer, endpoint, repoInfo.RemoteName, sf, out, auth); err != nil {
return err
} else if cs != checksum {
// Cache new checksum
if err := layer.SaveCheckSum(s.graph.ImageRoot(layer.ID), cs); err != nil {
return err
}
checksum = cs
}
} else {
out.Write(sf.FormatProgress(common.TruncateID(layer.ID), "Image already exists", nil))
}
m.FSLayers[i] = ®istry.FSLayer{BlobSum: checksum}
m.History[i] = ®istry.ManifestHistory{V1Compatibility: string(jsonData)}
}
if err := checkValidManifest(m); err != nil {
return fmt.Errorf("invalid manifest: %s", err)
}
log.Debugf("Pushing %s:%s to v2 repository", repoInfo.LocalName, tag)
mBytes, err := json.MarshalIndent(m, "", " ")
if err != nil {
return err
}
js, err := libtrust.NewJSONSignature(mBytes)
if err != nil {
return err
}
if err = js.Sign(s.trustKey); err != nil {
return err
}
signedBody, err := js.PrettySignature("signatures")
if err != nil {
return err
}
log.Infof("Signed manifest for %s:%s using daemon's key: %s", repoInfo.LocalName, tag, s.trustKey.KeyID())
// push the manifest
digest, err := r.PutV2ImageManifest(endpoint, repoInfo.RemoteName, tag, signedBody, mBytes, auth)
if err != nil {
return err
}
out.Write(sf.FormatStatus("", "Digest: %s", digest))
}
return nil
}
func (store *TagStore) ImageName(id string) string {
if names, exists := store.ByID()[id]; exists && len(names) > 0 {
return names[0]
}
return common.TruncateID(id)
}
func (s *TagStore) pullV2Tag(eng *engine.Engine, r *registry.Session, out io.Writer, endpoint *registry.Endpoint, repoInfo *registry.RepositoryInfo, tag string, sf *utils.StreamFormatter, parallel bool, auth *registry.RequestAuthorization) (bool, error) {
log.Debugf("Pulling tag from V2 registry: %q", tag)
manifestBytes, manifestDigest, err := r.GetV2ImageManifest(endpoint, repoInfo.RemoteName, tag, auth)
if err != nil {
return false, err
}
// loadManifest ensures that the manifest payload has the expected digest
// if the tag is a digest reference.
manifest, verified, err := s.loadManifest(eng, manifestBytes, manifestDigest, tag)
if err != nil {
return false, fmt.Errorf("error verifying manifest: %s", err)
}
if err := checkValidManifest(manifest); err != nil {
return false, err
}
if verified {
log.Printf("Image manifest for %s has been verified", utils.ImageReference(repoInfo.CanonicalName, tag))
}
out.Write(sf.FormatStatus(tag, "Pulling from %s", repoInfo.CanonicalName))
downloads := make([]downloadInfo, len(manifest.FSLayers))
for i := len(manifest.FSLayers) - 1; i >= 0; i-- {
var (
sumStr = manifest.FSLayers[i].BlobSum
imgJSON = []byte(manifest.History[i].V1Compatibility)
)
img, err := image.NewImgJSON(imgJSON)
if err != nil {
return false, fmt.Errorf("failed to parse json: %s", err)
}
downloads[i].img = img
// Check if exists
if s.graph.Exists(img.ID) {
log.Debugf("Image already exists: %s", img.ID)
continue
}
dgst, err := digest.ParseDigest(sumStr)
if err != nil {
return false, err
}
downloads[i].digest = dgst
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Pulling fs layer", nil))
downloadFunc := func(di *downloadInfo) error {
log.Debugf("pulling blob %q to V1 img %s", sumStr, img.ID)
if c, err := s.poolAdd("pull", "img:"+img.ID); err != nil {
if c != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Layer already being pulled by another client. Waiting.", nil))
<-c
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
} else {
log.Debugf("Image (id: %s) pull is already running, skipping: %v", img.ID, err)
}
} else {
defer s.poolRemove("pull", "img:"+img.ID)
tmpFile, err := ioutil.TempFile("", "GetV2ImageBlob")
if err != nil {
return err
}
r, l, err := r.GetV2ImageBlobReader(endpoint, repoInfo.RemoteName, di.digest.Algorithm(), di.digest.Hex(), auth)
if err != nil {
return err
}
defer r.Close()
verifier, err := digest.NewDigestVerifier(di.digest)
if err != nil {
return err
}
if _, err := io.Copy(tmpFile, progressreader.New(progressreader.Config{
In: ioutil.NopCloser(io.TeeReader(r, verifier)),
Out: out,
Formatter: sf,
Size: int(l),
NewLines: false,
ID: common.TruncateID(img.ID),
Action: "Downloading",
})); err != nil {
return fmt.Errorf("unable to copy v2 image blob data: %s", err)
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Verifying Checksum", nil))
if !verifier.Verified() {
log.Infof("Image verification failed: checksum mismatch for %q", di.digest.String())
verified = false
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
log.Debugf("Downloaded %s to tempfile %s", img.ID, tmpFile.Name())
di.tmpFile = tmpFile
di.length = l
di.downloaded = true
}
di.imgJSON = imgJSON
return nil
}
if parallel {
downloads[i].err = make(chan error)
go func(di *downloadInfo) {
di.err <- downloadFunc(di)
}(&downloads[i])
} else {
err := downloadFunc(&downloads[i])
if err != nil {
return false, err
}
}
}
var tagUpdated bool
for i := len(downloads) - 1; i >= 0; i-- {
d := &downloads[i]
if d.err != nil {
err := <-d.err
if err != nil {
return false, err
}
}
if d.downloaded {
// if tmpFile is empty assume download and extracted elsewhere
defer os.Remove(d.tmpFile.Name())
defer d.tmpFile.Close()
d.tmpFile.Seek(0, 0)
if d.tmpFile != nil {
err = s.graph.Register(d.img,
progressreader.New(progressreader.Config{
In: d.tmpFile,
Out: out,
Formatter: sf,
Size: int(d.length),
ID: common.TruncateID(d.img.ID),
Action: "Extracting",
}))
if err != nil {
return false, err
}
// FIXME: Pool release here for parallel tag pull (ensures any downloads block until fully extracted)
}
out.Write(sf.FormatProgress(common.TruncateID(d.img.ID), "Pull complete", nil))
tagUpdated = true
} else {
out.Write(sf.FormatProgress(common.TruncateID(d.img.ID), "Already exists", nil))
}
}
// Check for new tag if no layers downloaded
if !tagUpdated {
repo, err := s.Get(repoInfo.LocalName)
if err != nil {
return false, err
}
if repo != nil {
if _, exists := repo[tag]; !exists {
tagUpdated = true
}
}
}
if verified && tagUpdated {
out.Write(sf.FormatStatus(utils.ImageReference(repoInfo.CanonicalName, tag), "The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security."))
}
if manifestDigest != "" {
out.Write(sf.FormatStatus("", "Digest: %s", manifestDigest))
}
if utils.DigestReference(tag) {
if err = s.SetDigest(repoInfo.LocalName, tag, downloads[0].img.ID); err != nil {
return false, err
}
} else {
// only set the repository/tag -> image ID mapping when pulling by tag (i.e. not by digest)
if err = s.Set(repoInfo.LocalName, tag, downloads[0].img.ID, true); err != nil {
return false, err
}
}
return tagUpdated, nil
}
func (container *Container) Kill() error {
if !container.IsRunning() {
return nil
}
// 1. Send SIGKILL
if err := container.killPossiblyDeadProcess(9); err != nil {
return err
}
// 2. Wait for the process to die, in last resort, try to kill the process directly
if _, err := container.WaitStop(10 * time.Second); err != nil {
// Ensure that we don't kill ourselves
if pid := container.GetPid(); pid != 0 {
log.Infof("Container %s failed to exit within 10 seconds of kill - trying direct SIGKILL", common.TruncateID(container.ID))
if err := syscall.Kill(pid, 9); err != nil {
if err != syscall.ESRCH {
return err
}
log.Debugf("Cannot kill process (pid=%d) with signal 9: no such process.", pid)
}
}
}
container.WaitStop(-1 * time.Second)
return nil
}
func (s *TagStore) pullRepository(r *registry.Session, out io.Writer, repoInfo *registry.RepositoryInfo, askedTag string, sf *utils.StreamFormatter, parallel bool) error {
out.Write(sf.FormatStatus("", "Pulling repository %s", repoInfo.CanonicalName))
repoData, err := r.GetRepositoryData(repoInfo.RemoteName)
if err != nil {
if strings.Contains(err.Error(), "HTTP code: 404") {
return fmt.Errorf("Error: image %s not found", utils.ImageReference(repoInfo.RemoteName, askedTag))
}
// Unexpected HTTP error
return err
}
log.Debugf("Retrieving the tag list")
tagsList, err := r.GetRemoteTags(repoData.Endpoints, repoInfo.RemoteName, repoData.Tokens)
if err != nil {
log.Errorf("unable to get remote tags: %s", err)
return err
}
for tag, id := range tagsList {
repoData.ImgList[id] = ®istry.ImgData{
ID: id,
Tag: tag,
Checksum: "",
}
}
log.Debugf("Registering tags")
// If no tag has been specified, pull them all
if askedTag == "" {
for tag, id := range tagsList {
repoData.ImgList[id].Tag = tag
}
} else {
// Otherwise, check that the tag exists and use only that one
id, exists := tagsList[askedTag]
if !exists {
return fmt.Errorf("Tag %s not found in repository %s", askedTag, repoInfo.CanonicalName)
}
repoData.ImgList[id].Tag = askedTag
}
errors := make(chan error)
layers_downloaded := false
for _, image := range repoData.ImgList {
downloadImage := func(img *registry.ImgData) {
if askedTag != "" && img.Tag != askedTag {
if parallel {
errors <- nil
}
return
}
if img.Tag == "" {
log.Debugf("Image (id: %s) present in this repository but untagged, skipping", img.ID)
if parallel {
errors <- nil
}
return
}
// ensure no two downloads of the same image happen at the same time
if c, err := s.poolAdd("pull", "img:"+img.ID); err != nil {
if c != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Layer already being pulled by another client. Waiting.", nil))
<-c
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
} else {
log.Debugf("Image (id: %s) pull is already running, skipping: %v", img.ID, err)
}
if parallel {
errors <- nil
}
return
}
defer s.poolRemove("pull", "img:"+img.ID)
out.Write(sf.FormatProgress(common.TruncateID(img.ID), fmt.Sprintf("Pulling image (%s) from %s", img.Tag, repoInfo.CanonicalName), nil))
success := false
var lastErr, err error
var is_downloaded bool
for _, ep := range repoInfo.Index.Mirrors {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), fmt.Sprintf("Pulling image (%s) from %s, mirror: %s", img.Tag, repoInfo.CanonicalName, ep), nil))
if is_downloaded, err = s.pullImage(r, out, img.ID, ep, repoData.Tokens, sf); err != nil {
// Don't report errors when pulling from mirrors.
log.Debugf("Error pulling image (%s) from %s, mirror: %s, %s", img.Tag, repoInfo.CanonicalName, ep, err)
continue
}
layers_downloaded = layers_downloaded || is_downloaded
success = true
break
}
if !success {
for _, ep := range repoData.Endpoints {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), fmt.Sprintf("Pulling image (%s) from %s, endpoint: %s", img.Tag, repoInfo.CanonicalName, ep), nil))
if is_downloaded, err = s.pullImage(r, out, img.ID, ep, repoData.Tokens, sf); err != nil {
// It's not ideal that only the last error is returned, it would be better to concatenate the errors.
// As the error is also given to the output stream the user will see the error.
lastErr = err
out.Write(sf.FormatProgress(common.TruncateID(img.ID), fmt.Sprintf("Error pulling image (%s) from %s, endpoint: %s, %s", img.Tag, repoInfo.CanonicalName, ep, err), nil))
continue
}
layers_downloaded = layers_downloaded || is_downloaded
success = true
break
}
}
if !success {
err := fmt.Errorf("Error pulling image (%s) from %s, %v", img.Tag, repoInfo.CanonicalName, lastErr)
out.Write(sf.FormatProgress(common.TruncateID(img.ID), err.Error(), nil))
if parallel {
errors <- err
return
}
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
if parallel {
errors <- nil
}
}
if parallel {
go downloadImage(image)
} else {
downloadImage(image)
}
}
if parallel {
var lastError error
for i := 0; i < len(repoData.ImgList); i++ {
if err := <-errors; err != nil {
lastError = err
}
}
if lastError != nil {
return lastError
}
}
for tag, id := range tagsList {
if askedTag != "" && tag != askedTag {
continue
}
if err := s.Set(repoInfo.LocalName, tag, id, true); err != nil {
return err
}
}
requestedTag := repoInfo.CanonicalName
if len(askedTag) > 0 {
requestedTag = utils.ImageReference(repoInfo.CanonicalName, askedTag)
}
WriteStatus(requestedTag, out, sf, layers_downloaded)
return nil
}
func (s *TagStore) pullImage(r *registry.Session, out io.Writer, imgID, endpoint string, token []string, sf *utils.StreamFormatter) (bool, error) {
history, err := r.GetRemoteHistory(imgID, endpoint, token)
if err != nil {
return false, err
}
out.Write(sf.FormatProgress(common.TruncateID(imgID), "Pulling dependent layers", nil))
// FIXME: Try to stream the images?
// FIXME: Launch the getRemoteImage() in goroutines
layers_downloaded := false
for i := len(history) - 1; i >= 0; i-- {
id := history[i]
// ensure no two downloads of the same layer happen at the same time
if c, err := s.poolAdd("pull", "layer:"+id); err != nil {
log.Debugf("Image (id: %s) pull is already running, skipping: %v", id, err)
<-c
}
defer s.poolRemove("pull", "layer:"+id)
if !s.graph.Exists(id) {
out.Write(sf.FormatProgress(common.TruncateID(id), "Pulling metadata", nil))
var (
imgJSON []byte
imgSize int
err error
img *image.Image
)
retries := 5
for j := 1; j <= retries; j++ {
imgJSON, imgSize, err = r.GetRemoteImageJSON(id, endpoint, token)
if err != nil && j == retries {
out.Write(sf.FormatProgress(common.TruncateID(id), "Error pulling dependent layers", nil))
return layers_downloaded, err
} else if err != nil {
time.Sleep(time.Duration(j) * 500 * time.Millisecond)
continue
}
img, err = image.NewImgJSON(imgJSON)
layers_downloaded = true
if err != nil && j == retries {
out.Write(sf.FormatProgress(common.TruncateID(id), "Error pulling dependent layers", nil))
return layers_downloaded, fmt.Errorf("Failed to parse json: %s", err)
} else if err != nil {
time.Sleep(time.Duration(j) * 500 * time.Millisecond)
continue
} else {
break
}
}
for j := 1; j <= retries; j++ {
// Get the layer
status := "Pulling fs layer"
if j > 1 {
status = fmt.Sprintf("Pulling fs layer [retries: %d]", j)
}
out.Write(sf.FormatProgress(common.TruncateID(id), status, nil))
layer, err := r.GetRemoteImageLayer(img.ID, endpoint, token, int64(imgSize))
if uerr, ok := err.(*url.Error); ok {
err = uerr.Err
}
if terr, ok := err.(net.Error); ok && terr.Timeout() && j < retries {
time.Sleep(time.Duration(j) * 500 * time.Millisecond)
continue
} else if err != nil {
out.Write(sf.FormatProgress(common.TruncateID(id), "Error pulling dependent layers", nil))
return layers_downloaded, err
}
layers_downloaded = true
defer layer.Close()
err = s.graph.Register(img,
progressreader.New(progressreader.Config{
In: layer,
Out: out,
Formatter: sf,
Size: imgSize,
NewLines: false,
ID: common.TruncateID(id),
Action: "Downloading",
}))
if terr, ok := err.(net.Error); ok && terr.Timeout() && j < retries {
time.Sleep(time.Duration(j) * 500 * time.Millisecond)
continue
} else if err != nil {
out.Write(sf.FormatProgress(common.TruncateID(id), "Error downloading dependent layers", nil))
return layers_downloaded, err
} else {
break
}
}
}
out.Write(sf.FormatProgress(common.TruncateID(id), "Download complete", nil))
}
return layers_downloaded, nil
}
func (s *TagStore) pullV2Tag(eng *engine.Engine, r *registry.Session, out io.Writer, endpoint *registry.Endpoint, repoInfo *registry.RepositoryInfo, tag string, sf *utils.StreamFormatter, parallel bool, auth *registry.RequestAuthorization) (bool, error) {
log.Debugf("Pulling tag from V2 registry: %q", tag)
manifestBytes, err := r.GetV2ImageManifest(endpoint, repoInfo.RemoteName, tag, auth)
if err != nil {
return false, err
}
manifest, verified, err := s.loadManifest(eng, manifestBytes)
if err != nil {
return false, fmt.Errorf("error verifying manifest: %s", err)
}
if err := checkValidManifest(manifest); err != nil {
return false, err
}
if verified {
log.Printf("Image manifest for %s:%s has been verified", repoInfo.CanonicalName, tag)
}
out.Write(sf.FormatStatus(tag, "Pulling from %s", repoInfo.CanonicalName))
downloads := make([]downloadInfo, len(manifest.FSLayers))
for i := len(manifest.FSLayers) - 1; i >= 0; i-- {
var (
sumStr = manifest.FSLayers[i].BlobSum
imgJSON = []byte(manifest.History[i].V1Compatibility)
)
img, err := image.NewImgJSON(imgJSON)
if err != nil {
return false, fmt.Errorf("failed to parse json: %s", err)
}
downloads[i].img = img
// Check if exists
if s.graph.Exists(img.ID) {
log.Debugf("Image already exists: %s", img.ID)
continue
}
chunks := strings.SplitN(sumStr, ":", 2)
if len(chunks) < 2 {
return false, fmt.Errorf("expected 2 parts in the sumStr, got %#v", chunks)
}
sumType, checksum := chunks[0], chunks[1]
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Pulling fs layer", nil))
downloadFunc := func(di *downloadInfo) error {
log.Debugf("pulling blob %q to V1 img %s", sumStr, img.ID)
if c, err := s.poolAdd("pull", "img:"+img.ID); err != nil {
if c != nil {
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Layer already being pulled by another client. Waiting.", nil))
<-c
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
} else {
log.Debugf("Image (id: %s) pull is already running, skipping: %v", img.ID, err)
}
} else {
defer s.poolRemove("pull", "img:"+img.ID)
tmpFile, err := ioutil.TempFile("", "GetV2ImageBlob")
if err != nil {
return err
}
r, l, err := r.GetV2ImageBlobReader(endpoint, repoInfo.RemoteName, sumType, checksum, auth)
if err != nil {
return err
}
defer r.Close()
// Wrap the reader with the appropriate TarSum reader.
tarSumReader, err := tarsum.NewTarSumForLabel(r, true, sumType)
if err != nil {
return fmt.Errorf("unable to wrap image blob reader with TarSum: %s", err)
}
io.Copy(tmpFile, utils.ProgressReader(ioutil.NopCloser(tarSumReader), int(l), out, sf, false, common.TruncateID(img.ID), "Downloading"))
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Verifying Checksum", nil))
if finalChecksum := tarSumReader.Sum(nil); !strings.EqualFold(finalChecksum, sumStr) {
log.Infof("Image verification failed: checksum mismatch - expected %q but got %q", sumStr, finalChecksum)
verified = false
}
out.Write(sf.FormatProgress(common.TruncateID(img.ID), "Download complete", nil))
log.Debugf("Downloaded %s to tempfile %s", img.ID, tmpFile.Name())
di.tmpFile = tmpFile
di.length = l
di.downloaded = true
}
di.imgJSON = imgJSON
return nil
}
if parallel {
downloads[i].err = make(chan error)
go func(di *downloadInfo) {
di.err <- downloadFunc(di)
}(&downloads[i])
} else {
err := downloadFunc(&downloads[i])
if err != nil {
return false, err
}
}
}
var layersDownloaded bool
for i := len(downloads) - 1; i >= 0; i-- {
d := &downloads[i]
if d.err != nil {
err := <-d.err
if err != nil {
return false, err
}
}
if d.downloaded {
// if tmpFile is empty assume download and extracted elsewhere
defer os.Remove(d.tmpFile.Name())
defer d.tmpFile.Close()
d.tmpFile.Seek(0, 0)
if d.tmpFile != nil {
err = s.graph.Register(d.img,
utils.ProgressReader(d.tmpFile, int(d.length), out, sf, false, common.TruncateID(d.img.ID), "Extracting"))
if err != nil {
return false, err
}
// FIXME: Pool release here for parallel tag pull (ensures any downloads block until fully extracted)
}
out.Write(sf.FormatProgress(common.TruncateID(d.img.ID), "Pull complete", nil))
layersDownloaded = true
} else {
out.Write(sf.FormatProgress(common.TruncateID(d.img.ID), "Already exists", nil))
}
}
if verified && layersDownloaded {
out.Write(sf.FormatStatus(repoInfo.CanonicalName+":"+tag, "The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security."))
}
if err = s.Set(repoInfo.LocalName, tag, downloads[0].img.ID, true); err != nil {
return false, err
}
return layersDownloaded, nil
}