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authorValentin Rothberg <rothberg@redhat.com>2020-07-31 09:27:21 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-09-08 08:47:19 +0200
commit7fea46752cbfb0ef7bfdd694afe95038c9875212 (patch)
treecabd8c0ea232c36cfff7511cb1b1f3bfa30c0bbf /pkg/api/handlers/libpod
parentbe7778df6c70227dab760ea92637ed97dad29641 (diff)
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support multi-image (docker) archives
Support loading and saving tarballs with more than one image. Add a new `/libpod/images/export` endpoint to the rest API to allow for exporting/saving multiple images into an archive. Note that a non-release version of containers/image is vendored. A release version must be vendored before cutting a new Podman release. We force the containers/image version via a replace in the go.mod file; this way go won't try to match the versions. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'pkg/api/handlers/libpod')
-rw-r--r--pkg/api/handlers/libpod/images.go70
1 files changed, 70 insertions, 0 deletions
diff --git a/pkg/api/handlers/libpod/images.go b/pkg/api/handlers/libpod/images.go
index 8d3fc4e00..85f7903dc 100644
--- a/pkg/api/handlers/libpod/images.go
+++ b/pkg/api/handlers/libpod/images.go
@@ -234,6 +234,76 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
utils.WriteResponse(w, http.StatusOK, rdr)
}
+func ExportImages(w http.ResponseWriter, r *http.Request) {
+ var (
+ output string
+ )
+ runtime := r.Context().Value("runtime").(*libpod.Runtime)
+ decoder := r.Context().Value("decoder").(*schema.Decoder)
+ query := struct {
+ Compress bool `schema:"compress"`
+ Format string `schema:"format"`
+ References []string `schema:"references"`
+ }{
+ Format: define.OCIArchive,
+ }
+
+ if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+ utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+ errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+ return
+ }
+
+ // References are mandatory!
+ if len(query.References) == 0 {
+ utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+ errors.New("No references"))
+ return
+ }
+
+ // Format is mandatory! Currently, we only support multi-image docker
+ // archives.
+ switch query.Format {
+ case define.V2s2Archive:
+ tmpfile, err := ioutil.TempFile("", "api.tar")
+ if err != nil {
+ utils.Error(w, "unable to create tmpfile", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
+ return
+ }
+ output = tmpfile.Name()
+ if err := tmpfile.Close(); err != nil {
+ utils.Error(w, "unable to close tmpfile", http.StatusInternalServerError, errors.Wrap(err, "unable to close tempfile"))
+ return
+ }
+ default:
+ utils.Error(w, "unsupported format", http.StatusInternalServerError, errors.Errorf("unsupported format %q", query.Format))
+ return
+ }
+ defer os.RemoveAll(output)
+
+ // Use the ABI image engine to share as much code as possible.
+ opts := entities.ImageSaveOptions{
+ Compress: query.Compress,
+ Format: query.Format,
+ MultiImageArchive: true,
+ Output: output,
+ }
+
+ imageEngine := abi.ImageEngine{Libpod: runtime}
+ if err := imageEngine.Save(r.Context(), query.References[0], query.References[1:], opts); err != nil {
+ utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest, err)
+ return
+ }
+
+ rdr, err := os.Open(output)
+ if err != nil {
+ utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to read the exported tarfile"))
+ return
+ }
+ defer rdr.Close()
+ utils.WriteResponse(w, http.StatusOK, rdr)
+}
+
func ImagesLoad(w http.ResponseWriter, r *http.Request) {
runtime := r.Context().Value("runtime").(*libpod.Runtime)
decoder := r.Context().Value("decoder").(*schema.Decoder)