rbd: have GetVolumeGroup() return an empty volume group if it was n…

…ot found

Signed-off-by: Niels de Vos <[email protected]>

internal/rbd/group/volume_group.go

@@ -71,6 +71,12 @@ func GetVolumeGroup(
 
 	attrs, err := vg.getVolumeGroupAttributes(ctx)
 	if err != nil {
+		if errors.Is(librbd.ErrNotFound, err) {
+			log.DebugLog(ctx, "%v, returning empty volume group %q", vg, err)
+
+			return vg, err
+		}
+
 		return nil, fmt.Errorf("failed to get volume attributes for id %q: %w", vg, err)
 	}