Merge pull request #101287 from soltysh/replace_with_default

Fail fast when image is specified without tag

test/e2e/testing-manifests/storage-csi/mock/csi-mock-proxy.yaml

@@ -73,7 +73,7 @@ spec:
         # test for directories or create them. It needs additional privileges
         # for that.
         - name: busybox
-          image: k8s.gcr.io/busybox
+          image: k8s.gcr.io/e2e-test-images/busybox:1.29-1
           securityContext:
             privileged: true
           command:

test/utils/image/manifest.go

@@ -373,6 +373,9 @@ func ReplaceRegistryInImageURL(imageURL string) (string, error) {
 			}
 		}
 		last := strings.SplitN(parts[countParts-1], ":", 2)
+		if len(last) == 1 {
+			return "", fmt.Errorf("image %q is required to be in an image:tag format", imageURL)
+		}
 		config := getRepositoryMappedConfig(index, Config{
 			registry: parts[0],
 			name:     strings.Join([]string{strings.Join(parts[1:countParts-1], "/"), last[0]}, "/"),
@@ -384,6 +387,8 @@ func ReplaceRegistryInImageURL(imageURL string) (string, error) {
 	switch registryAndUser {
 	case "gcr.io/kubernetes-e2e-test-images":
 		registryAndUser = e2eRegistry
+	case "k8s.gcr.io/e2e-test-images":
+		registryAndUser = promoterE2eRegistry
 	case "k8s.gcr.io":
 		registryAndUser = gcRegistry
 	case "k8s.gcr.io/sig-storage":