Fix content digest not found for tmp reduced platform

Signed-off-by: apostasie <[email protected]>

Author: apostasie

pkg/cmd/image/push.go

@@ -119,6 +119,11 @@ func Push(ctx context.Context, client *containerd.Client, rawRef string, options
 		pushRef = ref + "-tmp-reduced-platform"
 		// Push fails with "400 Bad Request" when the manifest is multi-platform but we do not locally have multi-platform blobs.
 		// So we create a tmp reduced-platform image to avoid the error.
+		// Ensure all the layers are here: https://github.com/containerd/nerdctl/issues/3425
+		err = EnsureAllContent(ctx, client, ref, platMC, options.GOptions)
+		if err != nil {
+			return err
+		}
 		platImg, err := converter.Convert(ctx, client, pushRef, ref, converter.WithPlatform(platMC))
 		if err != nil {
 			if len(options.Platforms) == 0 {