// fetchImageByURL will try fetch an image using an URL.
func (f *fetcher) fetchImageByURL(u *url.URL, ascFile *os.File) (string, error) {
// Always fetch if it's a file
if u.Scheme == "file" {
stderr("rkt: using image from file %s", u.Path)
return f.fetchImageFromURL(u.String(), u.Scheme, ascFile, false)
}
// check the store
if !f.noStore {
rem, ok, err := f.s.GetRemote(u.String())
if err != nil {
return "", err
}
if ok {
stderr("rkt: using image from local store for url %s", u.String())
return rem.BlobKey, nil
}
}
// do remote fetching
if !f.storeOnly {
latest := false
if u.Scheme == "docker" {
dockerURL := common.ParseDockerURL(path.Join(u.Host, u.Path))
if dockerURL.Tag == "latest" {
latest = true
}
}
stderr("rkt: remote fetching from url %s", u.String())
return f.fetchImageFromURL(u.String(), u.Scheme, ascFile, latest)
}
return "", fmt.Errorf("unable to fetch image for url %s", u.String())
}
func (lb *FileBackend) GetImageInfo(dockerURL string) ([]string, *types.ParsedDockerURL, error) {
parsedDockerURL := common.ParseDockerURL(dockerURL)
appImageID, parsedDockerURL, err := getImageID(lb.file, parsedDockerURL)
if err != nil {
return nil, nil, fmt.Errorf("error getting ImageID: %v", err)
}
ancestry, err := getAncestry(lb.file, appImageID)
if err != nil {
return nil, nil, fmt.Errorf("error getting ancestry: %v", err)
}
return ancestry, parsedDockerURL, nil
}
func (rb *RepositoryBackend) GetImageInfo(url string) ([]string, *types.ParsedDockerURL, error) {
dockerURL := common.ParseDockerURL(url)
var supportsV2, ok bool
if supportsV2, ok = rb.hostsV2Support[dockerURL.IndexURL]; !ok {
var err error
supportsV2, err = rb.supportsV2(dockerURL.IndexURL)
if err != nil {
return nil, nil, err
}
rb.hostsV2Support[dockerURL.IndexURL] = supportsV2
}
if supportsV2 {
return rb.getImageInfoV2(dockerURL)
} else {
return rb.getImageInfoV1(dockerURL)
}
}
func (rb *RepositoryBackend) GetImageInfo(url string) ([]string, *types.ParsedDockerURL, error) {
dockerURL := common.ParseDockerURL(url)
repoData, err := rb.getRepoData(dockerURL.IndexURL, dockerURL.ImageName)
if err != nil {
return nil, nil, fmt.Errorf("error getting repository data: %v", err)
}
// TODO(iaguis) check more endpoints
appImageID, err := getImageIDFromTag(repoData.Endpoints[0], dockerURL.ImageName, dockerURL.Tag, repoData)
if err != nil {
return nil, nil, fmt.Errorf("error getting ImageID from tag %s: %v", dockerURL.Tag, err)
}
ancestry, err := getAncestry(appImageID, repoData.Endpoints[0], repoData)
if err != nil {
return nil, nil, err
}
rb.repoData = repoData
return ancestry, dockerURL, nil
}
// fetchSingleImage will take an image as either a URL or a name string and
// import it into the store if found. If discover is true meta-discovery is
// enabled. If asc is not "", it must exist as a local file and will be used
// as the signature file for verification, unless verification is disabled.
func (f *fetcher) fetchSingleImage(img string, asc string, discover bool) (string, error) {
var (
ascFile *os.File
err error
latest bool
)
if asc != "" && f.ks != nil {
ascFile, err = os.Open(asc)
if err != nil {
return "", fmt.Errorf("unable to open signature file: %v", err)
}
defer ascFile.Close()
}
u, err := url.Parse(img)
if err != nil {
return "", fmt.Errorf("not a valid image reference (%s)", img)
}
// if img refers to a local file, ensure the scheme is file:// and make the url path absolute
_, err = os.Stat(u.Path)
if err == nil {
u.Path, err = filepath.Abs(u.Path)
if err != nil {
return "", fmt.Errorf("unable to get abs path: %v", err)
}
u.Scheme = "file"
} else if !os.IsNotExist(err) {
return "", fmt.Errorf("unable to access %q: %v", img, err)
}
if discover && u.Scheme == "" {
if app := newDiscoveryApp(img); app != nil {
var discoveryError error
if !f.local {
stderr("rkt: searching for app image %s", img)
ep, err := discoverApp(app, true)
if err != nil {
discoveryError = err
} else {
// No specified version label, mark it as latest
if _, ok := app.Labels["version"]; !ok {
latest = true
}
return f.fetchImageFromEndpoints(app.Name.String(), ep, ascFile, latest)
}
}
if discoveryError != nil {
stderr("discovery failed for %q: %v. Trying to find image in the store.", img, discoveryError)
}
if f.local || discoveryError != nil {
return f.fetchImageFromStore(img)
}
}
}
switch u.Scheme {
case "http", "https", "file":
case "docker":
dockerURL := common.ParseDockerURL(path.Join(u.Host, u.Path))
if dockerURL.Tag == "latest" {
latest = true
}
default:
return "", fmt.Errorf("rkt only supports http, https, docker or file URLs (%s)", img)
}
return f.fetchImageFromURL(u.String(), u.Scheme, ascFile, latest)
}
// GetHash uses docker2aci to download the image and convert it to
// ACI, then stores it in the store and returns the hash.
func (f *dockerFetcher) GetHash(u *url.URL) (string, error) {
dockerURL := d2acommon.ParseDockerURL(path.Join(u.Host, u.Path))
latest := dockerURL.Tag == "latest"
return f.fetchImageFrom(u, latest)
}