Reraise exception with converting node ID

When a requested trait doesn't exist at trait deletion, the API
response contains an internal node ID, which shouldn't be exposed.
This patch reraises an exception with a node identifier specified to
the API.

Change-Id: I781a510b25fa7de735c97b4ed919dfcb3adbdd2c
Story: 2002062
Task: 19715

ironic/api/controllers/v1/node.py

@@ -865,8 +865,13 @@ class NodeTraitsController(rest.RestController):
         with notify.handle_error_notification(context, node, 'update',
                                               chassis_uuid=chassis_uuid):
             topic = pecan.request.rpcapi.get_topic_for(node)
-            pecan.request.rpcapi.remove_node_traits(
-                context, node.id, traits, topic=topic)
+            try:
+                pecan.request.rpcapi.remove_node_traits(
+                    context, node.id, traits, topic=topic)
+            except exception.NodeTraitNotFound:
+                # NOTE(hshiina): Internal node ID should not be exposed.
+                raise exception.NodeTraitNotFound(node_id=node.uuid,
+                                                  trait=trait)
         notify.emit_end_notification(context, node, 'update',
                                      chassis_uuid=chassis_uuid)
 

ironic/tests/unit/api/controllers/v1/test_node.py

@@ -4846,11 +4846,13 @@ class TestTraits(test_api_base.BaseApiTest):
     def test_delete_trait_fails_if_trait_not_found(self, mock_notify,
                                                    mock_remove):
         mock_remove.side_effect = exception.NodeTraitNotFound(
-            node_id=self.node.uuid, trait='CUSTOM_12')
+            node_id=self.node.id, trait='CUSTOM_12')
         ret = self.delete('/nodes/%s/traits/CUSTOM_12' % self.node.name,
                           headers={api_base.Version.string: self.version},
                           expect_errors=True)
         self.assertEqual(http_client.NOT_FOUND, ret.status_code)
+        self.assertIn(self.node.uuid, ret.json['error_message'])
+        self.assertNotIn(self.node.id, ret.json['error_message'])
         mock_remove.assert_called_once_with(mock.ANY, self.node.id,
                                             ['CUSTOM_12'], topic='test-topic')
         mock_notify.assert_has_calls(

releasenotes/notes/bug-2002062-959b865ced05b746.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixes a bug that exposes an internal node ID in an error message when
+    requested to delete a trait which doesn't exist. See
+    `bug 2002062 <https://storyboard.openstack.org/#!/story/2002062>`_ for
+    details.