// importTag import single tag from given ImageStream. Returns retrieved image (for later reuse),
// a flag saying if we should retry imports and 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, bool, error) {
glog.V(5).Infof("Importing tag %s from %s/%s...", tag, stream.Namespace, stream.Name)
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 {
// retry-able error no. 3
return nil, true, 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), dockerregistry.IsTagNotFound(err):
return nil, false, err
case err != nil:
// retry-able error no. 4
return nil, true, err
}
}
var image api.DockerImage
if err := kapi.Scheme.Convert(&dockerImage.Image, &image); err != nil {
return nil, false, 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. 5
return nil, true, err
}
return dockerImage, false, nil
}
// getTags returns tags from default upstream image repository and explicitly defined.
// Returns a map of tags to be imported and an error if one occurs.
// Tags explicitly defined will overwrite those from default upstream image repository.
func getTags(stream *api.ImageStream, client dockerregistry.Client, insecure bool) (map[string]api.DockerImageReference, error) {
imports := make(map[string]api.DockerImageReference)
references := sets.NewString()
// read explicitly defined tags
for tagName, specTag := range stream.Spec.Tags {
if specTag.From == nil {
continue
}
if specTag.From.Kind != "DockerImage" || specTag.Reference {
references.Insert(tagName)
continue
}
ref, err := api.ParseDockerImageReference(specTag.From.Name)
if err != nil {
glog.V(2).Infof("error parsing DockerImage %s: %v", specTag.From.Name, err)
continue
}
imports[tagName] = ref.DockerClientDefaults()
}
if len(stream.Spec.DockerImageRepository) == 0 {
return imports, nil
}
// read tags from default upstream image repository
streamRef, err := api.ParseDockerImageReference(stream.Spec.DockerImageRepository)
if err != nil {
util.HandleError(fmt.Errorf("invalid docker image repository, cannot import data: %v", err))
return imports, nil
}
conn, err := client.Connect(streamRef.Registry, insecure)
if err != nil {
// retry-able error no. 1
return imports, err
}
tags, err := conn.ImageTags(streamRef.Namespace, streamRef.Name)
switch {
case dockerregistry.IsRepositoryNotFound(err), dockerregistry.IsRegistryNotFound(err):
return imports, nil
case err != nil:
// retry-able error no. 2
return imports, err
}
for tag, image := range tags {
if _, ok := imports[tag]; ok || references.Has(tag) {
continue
}
idTagPresent := false
// this for loop is for backwards compatibility with v1 repo, where
// there was no image id returned with tags, like v2 does right now.
for t2, i2 := range tags {
if i2 == image && t2 == image {
idTagPresent = true
break
}
}
ref := streamRef
if idTagPresent {
ref.Tag = image
} else {
ref.Tag = tag
}
ref.ID = image
imports[tag] = ref
}
return imports, nil
}