// Next processes the given image stream, looking for streams that have DockerImageRepository
// set but have not yet been marked as "ready". If transient errors occur, err is returned but
// the image stream is not modified (so it will be tried again later). If a permanent
// failure occurs the image is marked with an annotation. The tags of the original spec image
// are left as is (those are updated through status).
func (c *ImportController) Next(stream *api.ImageStream) error {
if !needsImport(stream) {
return nil
}
name := stream.Spec.DockerImageRepository
ref, err := api.ParseDockerImageReference(name)
if err != nil {
err = fmt.Errorf("invalid docker image repository, cannot import data: %v", err)
util.HandleError(err)
return c.done(stream, err.Error(), retryCount)
}
insecure := stream.Annotations != nil && stream.Annotations[api.InsecureRepositoryAnnotation] == "true"
client := c.client
if client == nil {
client = dockerregistry.NewClient()
}
conn, err := client.Connect(ref.Registry, insecure, false)
if err != nil {
return err
}
tags, err := conn.ImageTags(ref.Namespace, ref.Name)
switch {
case dockerregistry.IsRepositoryNotFound(err), dockerregistry.IsRegistryNotFound(err):
return c.done(stream, err.Error(), retryCount)
case err != nil:
return err
}
imageToTag := make(map[string][]string)
for tag, image := range tags {
if specTag, ok := stream.Spec.Tags[tag]; ok && specTag.From != nil {
// spec tag is set to track another tag - do not import
continue
}
imageToTag[image] = append(imageToTag[image], tag)
}
// no tags to import
if len(imageToTag) == 0 {
return c.done(stream, "", retryCount)
}
for id, tags := range imageToTag {
dockerImage, err := conn.ImageByID(ref.Namespace, ref.Name, id)
switch {
case dockerregistry.IsRepositoryNotFound(err), dockerregistry.IsRegistryNotFound(err):
return c.done(stream, err.Error(), retryCount)
case dockerregistry.IsImageNotFound(err):
continue
case err != nil:
return err
}
var image api.DockerImage
if err := kapi.Scheme.Convert(&dockerImage.Image, &image); err != nil {
err = fmt.Errorf("could not convert image: %#v", err)
util.HandleError(err)
return c.done(stream, err.Error(), retryCount)
}
idTagPresent := false
if len(tags) > 1 && hasTag(tags, id) {
// only set to true if we have at least 1 tag that isn't the image id
idTagPresent = true
}
for _, tag := range tags {
if idTagPresent && id == tag {
continue
}
pullRef := api.DockerImageReference{
Registry: ref.Registry,
Namespace: ref.Namespace,
Name: ref.Name,
Tag: tag,
}
// prefer to pull by ID always
if dockerImage.PullByID {
// if the registry indicates the image is pullable by ID, clear the tag
pullRef.Tag = ""
pullRef.ID = dockerImage.ID
} else if idTagPresent {
// if there is a tag for the image by its id (tag=tag), we can pull by id
pullRef.Tag = id
}
mapping := &api.ImageStreamMapping{
ObjectMeta: kapi.ObjectMeta{
Name: stream.Name,
Namespace: stream.Namespace,
},
Tag: tag,
Image: api.Image{
ObjectMeta: kapi.ObjectMeta{
Name: dockerImage.ID,
},
DockerImageReference: pullRef.String(),
DockerImageMetadata: image,
},
}
if err := c.mappings.ImageStreamMappings(stream.Namespace).Create(mapping); err != nil {
if errors.IsNotFound(err) {
return c.done(stream, err.Error(), retryCount)
}
return err
}
}
}
// we've completed our updates
return c.done(stream, "", retryCount)
}
// importTag import single tag from given ImageStream. Returns an error if one occurs.
func (c *ImportController) importTag(stream *api.ImageStream, tag string, ref api.DockerImageReference, dockerImage *dockerregistry.Image, client dockerregistry.Client, insecure bool) (*dockerregistry.Image, error) {
if dockerImage == nil {
// TODO insecure applies to the stream's spec.dockerImageRepository, not necessarily to an external one!
conn, err := client.Connect(ref.Registry, insecure)
if err != nil {
return nil, err
}
if len(ref.ID) > 0 {
dockerImage, err = conn.ImageByID(ref.Namespace, ref.Name, ref.ID)
} else {
dockerImage, err = conn.ImageByTag(ref.Namespace, ref.Name, ref.Tag)
}
switch {
case dockerregistry.IsRepositoryNotFound(err), dockerregistry.IsRegistryNotFound(err), dockerregistry.IsImageNotFound(err):
return nil, nil
case err != nil:
// retry-able error no. 3
return nil, err
}
}
var image api.DockerImage
if err := kapi.Scheme.Convert(&dockerImage.Image, &image); err != nil {
return nil, fmt.Errorf("could not convert image: %#v", err)
}
// prefer to pull by ID always
if dockerImage.PullByID {
// if the registry indicates the image is pullable by ID, clear the tag
ref.Tag = ""
ref.ID = dockerImage.ID
}
mapping := &api.ImageStreamMapping{
ObjectMeta: kapi.ObjectMeta{
Name: stream.Name,
Namespace: stream.Namespace,
},
Tag: tag,
Image: api.Image{
ObjectMeta: kapi.ObjectMeta{
Name: dockerImage.ID,
},
DockerImageReference: ref.String(),
DockerImageMetadata: image,
},
}
if err := c.mappings.ImageStreamMappings(stream.Namespace).Create(mapping); err != nil {
// retry-able no. 4
return nil, err
}
return dockerImage, nil
}