// GetImageID returns an image ID corresponding to the image referred to by
// refOrID.
func (daemon *Daemon) GetImageID(refOrID string) (image.ID, error) {
id, ref, err := reference.ParseIDOrReference(refOrID)
if err != nil {
return "", err
}
if id != "" {
if _, err := daemon.imageStore.Get(image.IDFromDigest(id)); err != nil {
return "", ErrImageDoesNotExist{refOrID}
}
return image.IDFromDigest(id), nil
}
if id, err := daemon.referenceStore.Get(ref); err == nil {
return image.IDFromDigest(id), nil
}
if tagged, ok := ref.(reference.NamedTagged); ok {
if id, err := daemon.imageStore.Search(tagged.Tag()); err == nil {
for _, namedRef := range daemon.referenceStore.References(id.Digest()) {
if namedRef.Name() == ref.Name() {
return id, nil
}
}
}
}
// Search based on ID
if id, err := daemon.imageStore.Search(refOrID); err == nil {
return id, nil
}
return "", ErrImageDoesNotExist{refOrID}
}
func (s *imageConfigStore) Get(d digest.Digest) ([]byte, error) {
img, err := s.Store.Get(image.IDFromDigest(d))
if err != nil {
return nil, err
}
return img.RawJSON(), nil
}
// GetImageID returns an image ID corresponding to the image referred to by
// refOrID.
func (daemon *Daemon) GetImageID(refOrID string) (image.ID, error) {
id, ref, err := reference.ParseIDOrReference(refOrID)
if err != nil {
return "", err
}
if id != "" {
if _, err := daemon.imageStore.Get(image.IDFromDigest(id)); err != nil {
return "", ErrImageDoesNotExist{refOrID}
}
return image.IDFromDigest(id), nil
}
if id, err := daemon.referenceStore.Get(ref); err == nil {
return image.IDFromDigest(id), nil
}
// deprecated: repo:shortid https://github.com/docker/docker/pull/799
if tagged, ok := ref.(reference.NamedTagged); ok {
if tag := tagged.Tag(); stringid.IsShortID(stringid.TruncateID(tag)) {
if id, err := daemon.imageStore.Search(tag); err == nil {
for _, namedRef := range daemon.referenceStore.References(id.Digest()) {
if namedRef.Name() == ref.Name() {
return id, nil
}
}
}
}
}
// Search based on ID
if id, err := daemon.imageStore.Search(refOrID); err == nil {
return id, nil
}
return "", ErrImageDoesNotExist{refOrID}
}
func (l *tarexporter) parseNames(names []string) (map[image.ID]*imageDescriptor, error) {
imgDescr := make(map[image.ID]*imageDescriptor)
addAssoc := func(id image.ID, ref reference.Named) {
if _, ok := imgDescr[id]; !ok {
imgDescr[id] = &imageDescriptor{}
}
if ref != nil {
var tagged reference.NamedTagged
if _, ok := ref.(reference.Canonical); ok {
return
}
var ok bool
if tagged, ok = ref.(reference.NamedTagged); !ok {
var err error
if tagged, err = reference.WithTag(ref, reference.DefaultTag); err != nil {
return
}
}
for _, t := range imgDescr[id].refs {
if tagged.String() == t.String() {
return
}
}
imgDescr[id].refs = append(imgDescr[id].refs, tagged)
}
}
for _, name := range names {
id, ref, err := reference.ParseIDOrReference(name)
if err != nil {
return nil, err
}
if id != "" {
_, err := l.is.Get(image.IDFromDigest(id))
if err != nil {
return nil, err
}
addAssoc(image.IDFromDigest(id), nil)
continue
}
if ref.Name() == string(digest.Canonical) {
imgID, err := l.is.Search(name)
if err != nil {
return nil, err
}
addAssoc(imgID, nil)
continue
}
if reference.IsNameOnly(ref) {
assocs := l.rs.ReferencesByName(ref)
for _, assoc := range assocs {
addAssoc(image.IDFromDigest(assoc.ID), assoc.Ref)
}
if len(assocs) == 0 {
imgID, err := l.is.Search(name)
if err != nil {
return nil, err
}
addAssoc(imgID, nil)
}
continue
}
id, err = l.rs.Get(ref)
if err != nil {
return nil, err
}
addAssoc(image.IDFromDigest(id), ref)
}
return imgDescr, nil
}
func (p *v2Puller) pullSchema2(ctx context.Context, ref reference.Named, mfst *schema2.DeserializedManifest) (id digest.Digest, manifestDigest digest.Digest, err error) {
manifestDigest, err = schema2ManifestDigest(ref, mfst)
if err != nil {
return "", "", err
}
target := mfst.Target()
if _, err := p.config.ImageStore.Get(image.IDFromDigest(target.Digest)); err == nil {
// If the image already exists locally, no need to pull
// anything.
return target.Digest, manifestDigest, nil
}
var descriptors []xfer.DownloadDescriptor
// Note that the order of this loop is in the direction of bottom-most
// to top-most, so that the downloads slice gets ordered correctly.
for _, d := range mfst.Layers {
layerDescriptor := &v2LayerDescriptor{
digest: d.Digest,
repo: p.repo,
repoInfo: p.repoInfo,
V2MetadataService: p.V2MetadataService,
src: d,
}
descriptors = append(descriptors, layerDescriptor)
}
configChan := make(chan []byte, 1)
errChan := make(chan error, 1)
var cancel func()
ctx, cancel = context.WithCancel(ctx)
// Pull the image config
go func() {
configJSON, err := p.pullSchema2Config(ctx, target.Digest)
if err != nil {
errChan <- ImageConfigPullError{Err: err}
cancel()
return
}
configChan <- configJSON
}()
var (
configJSON []byte // raw serialized image config
unmarshalledConfig image.Image // deserialized image config
downloadRootFS image.RootFS // rootFS to use for registering layers.
)
// https://github.com/docker/docker/issues/24766 - Err on the side of caution,
// explicitly blocking images intended for linux from the Windows daemon. On
// Windows, we do this before the attempt to download, effectively serialising
// the download slightly slowing it down. We have to do it this way, as
// chances are the download of layers itself would fail due to file names
// which aren't suitable for NTFS. At some point in the future, if a similar
// check to block Windows images being pulled on Linux is implemented, it
// may be necessary to perform the same type of serialisation.
if runtime.GOOS == "windows" {
configJSON, unmarshalledConfig, err = receiveConfig(configChan, errChan)
if err != nil {
return "", "", err
}
if unmarshalledConfig.RootFS == nil {
return "", "", errRootFSInvalid
}
if unmarshalledConfig.OS == "linux" {
return "", "", fmt.Errorf("image operating system %q cannot be used on this platform", unmarshalledConfig.OS)
}
}
downloadRootFS = *image.NewRootFS()
rootFS, release, err := p.config.DownloadManager.Download(ctx, downloadRootFS, descriptors, p.config.ProgressOutput)
if err != nil {
if configJSON != nil {
// Already received the config
return "", "", err
}
select {
case err = <-errChan:
return "", "", err
default:
cancel()
select {
case <-configChan:
case <-errChan:
}
return "", "", err
}
}
defer release()
if configJSON == nil {
configJSON, unmarshalledConfig, err = receiveConfig(configChan, errChan)
if err != nil {
return "", "", err
}
if unmarshalledConfig.RootFS == nil {
return "", "", errRootFSInvalid
}
}
// The DiffIDs returned in rootFS MUST match those in the config.
// Otherwise the image config could be referencing layers that aren't
// included in the manifest.
if len(rootFS.DiffIDs) != len(unmarshalledConfig.RootFS.DiffIDs) {
return "", "", errRootFSMismatch
}
for i := range rootFS.DiffIDs {
if rootFS.DiffIDs[i] != unmarshalledConfig.RootFS.DiffIDs[i] {
return "", "", errRootFSMismatch
}
}
imageID, err := p.config.ImageStore.Create(configJSON)
if err != nil {
return "", "", err
}
return imageID.Digest(), manifestDigest, nil
}
func (p *v2Pusher) pushV2Tag(ctx context.Context, ref reference.NamedTagged, id digest.Digest) error {
logrus.Debugf("Pushing repository: %s", ref.String())
img, err := p.config.ImageStore.Get(image.IDFromDigest(id))
if err != nil {
return fmt.Errorf("could not find image from tag %s: %v", ref.String(), err)
}
var l layer.Layer
topLayerID := img.RootFS.ChainID()
if topLayerID == "" {
l = layer.EmptyLayer
} else {
l, err = p.config.LayerStore.Get(topLayerID)
if err != nil {
return fmt.Errorf("failed to get top layer from image: %v", err)
}
defer layer.ReleaseAndLog(p.config.LayerStore, l)
}
var descriptors []xfer.UploadDescriptor
descriptorTemplate := v2PushDescriptor{
v2MetadataService: p.v2MetadataService,
repoInfo: p.repoInfo,
ref: p.ref,
repo: p.repo,
pushState: &p.pushState,
}
// Loop bounds condition is to avoid pushing the base layer on Windows.
for i := 0; i < len(img.RootFS.DiffIDs); i++ {
descriptor := descriptorTemplate
descriptor.layer = l
descriptors = append(descriptors, &descriptor)
l = l.Parent()
}
if err := p.config.UploadManager.Upload(ctx, descriptors, p.config.ProgressOutput); err != nil {
return err
}
// Try schema2 first
builder := schema2.NewManifestBuilder(p.repo.Blobs(ctx), img.RawJSON())
manifest, err := manifestFromBuilder(ctx, builder, descriptors)
if err != nil {
return err
}
manSvc, err := p.repo.Manifests(ctx)
if err != nil {
return err
}
putOptions := []distribution.ManifestServiceOption{distribution.WithTag(ref.Tag())}
if _, err = manSvc.Put(ctx, manifest, putOptions...); err != nil {
if runtime.GOOS == "windows" {
logrus.Warnf("failed to upload schema2 manifest: %v", err)
return err
}
logrus.Warnf("failed to upload schema2 manifest: %v - falling back to schema1", err)
manifestRef, err := distreference.WithTag(p.repo.Named(), ref.Tag())
if err != nil {
return err
}
builder = schema1.NewConfigManifestBuilder(p.repo.Blobs(ctx), p.config.TrustKey, manifestRef, img.RawJSON())
manifest, err = manifestFromBuilder(ctx, builder, descriptors)
if err != nil {
return err
}
if _, err = manSvc.Put(ctx, manifest, putOptions...); err != nil {
return err
}
}
var canonicalManifest []byte
switch v := manifest.(type) {
case *schema1.SignedManifest:
canonicalManifest = v.Canonical
case *schema2.DeserializedManifest:
_, canonicalManifest, err = v.Payload()
if err != nil {
return err
}
}
manifestDigest := digest.FromBytes(canonicalManifest)
progress.Messagef(p.config.ProgressOutput, "", "%s: digest: %s size: %d", ref.Tag(), manifestDigest, len(canonicalManifest))
if err := addDigestReference(p.config.ReferenceStore, ref, manifestDigest, id); err != nil {
return err
}
// Signal digest to the trust client so it can sign the
// push, if appropriate.
progress.Aux(p.config.ProgressOutput, PushResult{Tag: ref.Tag(), Digest: manifestDigest, Size: len(canonicalManifest)})
return nil
}
// Retrieve the all the images to be uploaded in the correct order
func (p *v1Pusher) getImageList() (imageList []v1Image, tagsByImage map[image.ID][]string, referencedLayers []PushLayer, err error) {
tagsByImage = make(map[image.ID][]string)
// Ignore digest references
if _, isCanonical := p.ref.(reference.Canonical); isCanonical {
return
}
tagged, isTagged := p.ref.(reference.NamedTagged)
if isTagged {
// Push a specific tag
var imgID image.ID
var dgst digest.Digest
dgst, err = p.config.ReferenceStore.Get(p.ref)
if err != nil {
return
}
imgID = image.IDFromDigest(dgst)
imageList, err = p.imageListForTag(imgID, nil, &referencedLayers)
if err != nil {
return
}
tagsByImage[imgID] = []string{tagged.Tag()}
return
}
imagesSeen := make(map[digest.Digest]struct{})
dependenciesSeen := make(map[layer.ChainID]*v1DependencyImage)
associations := p.config.ReferenceStore.ReferencesByName(p.ref)
for _, association := range associations {
if tagged, isTagged = association.Ref.(reference.NamedTagged); !isTagged {
// Ignore digest references.
continue
}
imgID := image.IDFromDigest(association.ID)
tagsByImage[imgID] = append(tagsByImage[imgID], tagged.Tag())
if _, present := imagesSeen[association.ID]; present {
// Skip generating image list for already-seen image
continue
}
imagesSeen[association.ID] = struct{}{}
imageListForThisTag, err := p.imageListForTag(imgID, dependenciesSeen, &referencedLayers)
if err != nil {
return nil, nil, nil, err
}
// append to main image list
imageList = append(imageList, imageListForThisTag...)
}
if len(imageList) == 0 {
return nil, nil, nil, fmt.Errorf("No images found for the requested repository / tag")
}
logrus.Debugf("Image list: %v", imageList)
logrus.Debugf("Tags by image: %v", tagsByImage)
return
}