// PullImage performs a docker pull on an image specified by repo/tag.
// TODO: Detect if the pulled image has a different imageID than the value retrieved from
// metadata, and if so correct the metadata, or at least skip processing the image.
func PullImage(metadata ImageMetadataInfo) {
tagspec := RegistrySpec + "/" + metadata.Repo + ":" + metadata.Tag
apipath := "/images/create?fromImage=" + tagspec
blog.Info("PullImage downloading %s, Image ID: %s", apipath, metadata.Image)
config.BanyanUpdate("Pull", apipath, metadata.Image)
resp, err := DockerAPI(DockerTransport, "POST", apipath, []byte{}, XRegistryAuth)
if err != nil {
blog.Error(err, "PullImage failed for", RegistrySpec, metadata.Repo, metadata.Tag, metadata.Image)
}
if strings.Contains(string(resp), `"error":`) {
blog.Error("PullImage error for %s/%s/%s", RegistrySpec, metadata.Repo, metadata.Tag)
}
blog.Trace(string(resp))
return
}
// PullImage performs a docker pull on an image specified by repo/tag.
func PullImage(metadata *ImageMetadataInfo) (err error) {
tagspec := metadata.Repo + ":" + metadata.Tag
if RegistrySpec != config.DockerHub {
tagspec = RegistrySpec + "/" + tagspec
}
apipath := "/images/create?fromImage=" + tagspec
blog.Info("PullImage downloading %s, Image ID: %s", apipath, metadata.Image)
config.BanyanUpdate("Pull", apipath, metadata.Image)
resp, err := DockerAPI(DockerTransport, "POST", apipath, []byte{}, XRegistryAuth)
if err != nil {
except.Error(err, "PullImage failed for", RegistrySpec, metadata.Repo, metadata.Tag, metadata.Image)
return
}
if strings.Contains(string(resp), `"error":`) {
err = errors.New("PullImage error for " + RegistrySpec + "/" + metadata.Repo + "/" + metadata.Tag)
except.Error(err)
return
}
blog.Trace(string(resp))
// get the Docker-calculated image ID
calculatedID, err := dockerImageID(RegistrySpec, metadata)
if err != nil {
except.Error(err, "dockerImageID")
return
}
if metadata.Image > "" && metadata.Image != calculatedID {
newMetadata := *metadata
newMetadata.Image = calculatedID
RemoveImages([]ImageMetadataInfo{newMetadata})
err = errors.New("PullImage " + metadata.Repo + ":" + metadata.Tag +
" image ID " + calculatedID + " doesn't match metadata-derived ID " +
metadata.Image)
except.Error(err)
return err
}
metadata.Image = calculatedID
return
}