Import manifest lists with linux/amd64 platform

Author: Oleg Bulatov

pkg/image/importer/importer.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/docker/distribution"
 	"github.com/docker/distribution/digest"
+	"github.com/docker/distribution/manifest/manifestlist"
 	"github.com/docker/distribution/manifest/schema1"
 	"github.com/docker/distribution/manifest/schema2"
 	"github.com/docker/distribution/reference"
@@ -537,6 +538,25 @@ func (isi *ImageStreamImporter) importRepositoryFromDocker(ctx gocontext.Context
 			manifest = m
 		}
 
+		if manifestList, isManifestList := manifest.(*manifestlist.DeserializedManifestList); isManifestList {
+			found := false
+			for _, m := range manifestList.Manifests {
+				if m.Platform.OS == "linux" && m.Platform.Architecture == "amd64" {
+					manifest, err = s.Get(ctx, m.Digest)
+					if err != nil {
+						glog.V(5).Infof("unable to access digest %q for tag %q for repository %#v: %#v", m.Digest, importTag.Name, repository, err)
+						importTag.Err = formatRepositoryError(repository, importTag.Name, "", err)
+						continue
+					}
+					found = true
+				}
+			}
+			if !found {
+				glog.V(5).Infof("unsupported manifest list: %#v", manifestList)
+				continue
+			}
+		}
+
 		if signedManifest, isSchema1 := manifest.(*schema1.SignedManifest); isSchema1 {
 			importTag.Image, err = schema1ToImage(signedManifest, "")
 		} else if deserializedManifest, isSchema2 := manifest.(*schema2.DeserializedManifest); isSchema2 {