func (t *mockTagAdder) AddTag(ref reference.Named, id image.ID, force bool) error {
if t.refs == nil {
t.refs = make(map[string]string)
}
t.refs[ref.String()] = id.String()
return nil
}
// TagImageWithReference adds the given reference to the image ID provided.
func (daemon *Daemon) TagImageWithReference(imageID image.ID, newTag reference.Named) error {
if err := daemon.referenceStore.AddTag(newTag, imageID.Digest(), true); err != nil {
return err
}
daemon.LogImageEvent(imageID.String(), newTag.String(), "tag")
return nil
}
func (s *saveSession) saveImage(id image.ID) (map[layer.DiffID]distribution.Descriptor, error) {
img, err := s.is.Get(id)
if err != nil {
return nil, err
}
if len(img.RootFS.DiffIDs) == 0 {
return nil, fmt.Errorf("empty export - not implemented")
}
var parent digest.Digest
var layers []string
var foreignSrcs map[layer.DiffID]distribution.Descriptor
for i := range img.RootFS.DiffIDs {
v1Img := image.V1Image{
Created: img.Created,
}
if i == len(img.RootFS.DiffIDs)-1 {
v1Img = img.V1Image
}
rootFS := *img.RootFS
rootFS.DiffIDs = rootFS.DiffIDs[:i+1]
v1ID, err := v1.CreateID(v1Img, rootFS.ChainID(), parent)
if err != nil {
return nil, err
}
v1Img.ID = v1ID.Hex()
if parent != "" {
v1Img.Parent = parent.Hex()
}
src, err := s.saveLayer(rootFS.ChainID(), v1Img, img.Created)
if err != nil {
return nil, err
}
layers = append(layers, v1Img.ID)
parent = v1ID
if src.Digest != "" {
if foreignSrcs == nil {
foreignSrcs = make(map[layer.DiffID]distribution.Descriptor)
}
foreignSrcs[img.RootFS.DiffIDs[i]] = src
}
}
configFile := filepath.Join(s.outDir, id.Digest().Hex()+".json")
if err := ioutil.WriteFile(configFile, img.RawJSON(), 0644); err != nil {
return nil, err
}
if err := system.Chtimes(configFile, img.Created, img.Created); err != nil {
return nil, err
}
s.images[id].layers = layers
return foreignSrcs, nil
}
// checkImageDeleteConflict determines whether there are any conflicts
// preventing deletion of the given image from this daemon. A hard conflict is
// any image which has the given image as a parent or any running container
// using the image. A soft conflict is any tags/digest referencing the given
// image or any stopped container using the image. If ignoreSoftConflicts is
// true, this function will not check for soft conflict conditions.
func (daemon *Daemon) checkImageDeleteConflict(imgID image.ID, mask conflictType) *imageDeleteConflict {
// Check if the image has any descendant images.
if mask&conflictDependentChild != 0 && len(daemon.imageStore.Children(imgID)) > 0 {
return &imageDeleteConflict{
hard: true,
imgID: imgID,
message: "image has dependent child images",
}
}
if mask&conflictRunningContainer != 0 {
// Check if any running container is using the image.
running := func(c *container.Container) bool {
return c.IsRunning() && c.ImageID == imgID
}
if container := daemon.containers.First(running); container != nil {
return &imageDeleteConflict{
imgID: imgID,
hard: true,
used: true,
message: fmt.Sprintf("image is being used by running container %s", stringid.TruncateID(container.ID)),
}
}
}
// Check if any repository tags/digest reference this image.
if mask&conflictActiveReference != 0 && len(daemon.referenceStore.References(imgID.Digest())) > 0 {
return &imageDeleteConflict{
imgID: imgID,
message: "image is referenced in multiple repositories",
}
}
if mask&conflictStoppedContainer != 0 {
// Check if any stopped containers reference this image.
stopped := func(c *container.Container) bool {
return !c.IsRunning() && c.ImageID == imgID
}
if container := daemon.containers.First(stopped); container != nil {
return &imageDeleteConflict{
imgID: imgID,
used: true,
message: fmt.Sprintf("image is being used by stopped container %s", stringid.TruncateID(container.ID)),
}
}
}
return nil
}
// imageDeleteHelper attempts to delete the given image from this daemon. If
// the image has any hard delete conflicts (child images or running containers
// using the image) then it cannot be deleted. If the image has any soft delete
// conflicts (any tags/digests referencing the image or any stopped container
// using the image) then it can only be deleted if force is true. If the delete
// succeeds and prune is true, the parent images are also deleted if they do
// not have any soft or hard delete conflicts themselves. Any deleted images
// and untagged references are appended to the given records. If any error or
// conflict is encountered, it will be returned immediately without deleting
// the image. If quiet is true, any encountered conflicts will be ignored and
// the function will return nil immediately without deleting the image.
func (daemon *Daemon) imageDeleteHelper(imgID image.ID, records *[]types.ImageDelete, force, prune, quiet bool) error {
// First, determine if this image has any conflicts. Ignore soft conflicts
// if force is true.
if conflict := daemon.checkImageDeleteConflict(imgID, force); conflict != nil {
if quiet && !daemon.imageIsDangling(imgID) {
// Ignore conflicts UNLESS the image is "dangling" in
// which case we want the user to know.
return nil
}
// There was a conflict and it's either a hard conflict OR we are not
// forcing deletion on soft conflicts.
return conflict
}
parent, err := daemon.imageStore.GetParent(imgID)
if err != nil {
// There may be no parent
parent = ""
}
// Delete all repository tag/digest references to this image.
if err := daemon.removeAllReferencesToImageID(imgID, records); err != nil {
return err
}
removedLayers, err := daemon.imageStore.Delete(imgID)
if err != nil {
return err
}
daemon.EventsService.Log("delete", imgID.String(), "")
*records = append(*records, types.ImageDelete{Deleted: imgID.String()})
for _, removedLayer := range removedLayers {
*records = append(*records, types.ImageDelete{Deleted: removedLayer.ChainID.String()})
}
if !prune || parent == "" {
return nil
}
// We need to prune the parent image. This means delete it if there are
// no tags/digests referencing it and there are no containers using it (
// either running or stopped).
// Do not force prunings, but do so quietly (stopping on any encountered
// conflicts).
return daemon.imageDeleteHelper(parent, records, false, true, true)
}
// removeAllReferencesToImageID attempts to remove every reference to the given
// imgID from this daemon's store of repository tag/digest references. Returns
// on the first encountered error. Removed references are logged to this
// daemon's event service. An "Untagged" types.ImageDelete is added to the
// given list of records.
func (daemon *Daemon) removeAllReferencesToImageID(imgID image.ID, records *[]types.ImageDelete) error {
imageRefs := daemon.referenceStore.References(imgID)
for _, imageRef := range imageRefs {
parsedRef, err := daemon.removeImageRef(imageRef)
if err != nil {
return err
}
untaggedRecord := types.ImageDelete{Untagged: parsedRef.String()}
daemon.LogImageEvent(imgID.String(), imgID.String(), "untag")
*records = append(*records, untaggedRecord)
}
return nil
}
func newV1TopImage(imageID image.ID, img *image.Image, l layer.Layer, parent *v1DependencyImage) (*v1TopImage, error) {
v1ID := imageID.Digest().Hex()
parentV1ID := ""
if parent != nil {
parentV1ID = parent.V1ID()
}
config, err := v1.MakeV1ConfigFromConfig(img, v1ID, parentV1ID, false)
if err != nil {
return nil, err
}
return &v1TopImage{
v1ImageCommon: v1ImageCommon{
v1ID: v1ID,
config: config,
layer: l,
},
imageID: imageID,
}, nil
}
// imageIsDangling returns whether the given image is "dangling" which means
// that there are no repository references to the given image and it has no
// child images.
func (daemon *Daemon) imageIsDangling(imgID image.ID) bool {
return !(len(daemon.referenceStore.References(imgID.Digest())) > 0 || len(daemon.imageStore.Children(imgID)) > 0)
}