Merge "Update image_base_image_ref during rebuild."

Author: Zuul

nova/compute/api.py

@@ -3549,6 +3549,8 @@ def _reset_image_metadata():
             new_sys_metadata = utils.get_system_metadata_from_image(
                 image, flavor)
 
+            new_sys_metadata.update({'image_base_image_ref': image_id})
+
             instance.system_metadata.update(new_sys_metadata)
             instance.save()
             return orig_sys_metadata
@@ -4185,6 +4187,14 @@ def shelve(self, context, instance, clean_shutdown=True):
         hypervisor.
         """
         instance.task_state = task_states.SHELVING
+
+        # NOTE(aarents): Ensure image_base_image_ref is present as it will be
+        # needed during unshelve and instance rebuild done before Bug/1893618
+        # Fix dropped it.
+        instance.system_metadata.update(
+                {'image_base_image_ref': instance.image_ref}
+        )
+
         instance.save(expected_task_state=[None])
 
         self._record_action_start(context, instance, instance_actions.SHELVE)

nova/tests/unit/compute/test_compute.py

@@ -9019,6 +9019,7 @@ def fake_rpc_rebuild(context, **kwargs):
                      'image_ramdisk_id': uuids.ramdisk_id,
                      'image_something_else': 'meow',
                      'preserved': 'preserve this!',
+                     'image_base_image_ref': image_ref,
                      'boot_roles': ''},
                     sys_meta)