Return 409s instead of 500s when deleting certain instances.

Fixes bug 911879

Change-Id: Ib2ae875ec2d1eeea21d15a756b96c27047b12bee

2 files changed, 38 insertions, 0 deletions

diff --git a/nova/api/openstack/v2/servers.py b/nova/api/openstack/v2/servers.py
index d98d532dc..bab2976f9 100644
--- a/nova/api/openstack/v2/servers.py
+++ b/nova/api/openstack/v2/servers.py
@@ -575,6 +575,10 @@ class Controller(wsgi.Controller):
             self._delete(req.environ['nova.context'], id)
         except exception.NotFound:
             raise exc.HTTPNotFound()
+        except exception.InstanceInvalidState as state_error:
+            state = state_error.kwargs.get("state")
+            msg = _("Unable to delete instance when %s") % state
+            raise exc.HTTPConflict(explanation=msg)
 
     def _get_key_name(self, req, body):
         if 'server' in body:
diff --git a/nova/tests/api/openstack/v2/test_servers.py b/nova/tests/api/openstack/v2/test_servers.py
index 03627c833..6272eb5eb 100644
--- a/nova/tests/api/openstack/v2/test_servers.py
+++ b/nova/tests/api/openstack/v2/test_servers.py
@@ -1200,6 +1200,40 @@ class ServersControllerTest(test.TestCase):
 
         self.assertEqual(self.server_delete_called, True)
 
+    def test_delete_server_instance_while_building(self):
+        req = fakes.HTTPRequest.blank('/v2/fake/servers/%s' % FAKE_UUID)
+        req.method = 'DELETE'
+
+        self.server_delete_called = False
+
+        new_return_server = return_server_with_attributes(
+            vm_state=vm_states.BUILDING)
+        self.stubs.Set(nova.db, 'instance_get', new_return_server)
+
+        def instance_destroy_mock(context, id):
+            self.server_delete_called = True
+        self.stubs.Set(nova.db, 'instance_destroy', instance_destroy_mock)
+
+        with self.assertRaises(webob.exc.HTTPConflict):
+            self.controller.delete(req, FAKE_UUID)
+
+    def test_delete_server_instance_while_resize(self):
+        req = fakes.HTTPRequest.blank('/v2/fake/servers/%s' % FAKE_UUID)
+        req.method = 'DELETE'
+
+        self.server_delete_called = False
+
+        new_return_server = return_server_with_attributes(
+            vm_state=vm_states.RESIZING)
+        self.stubs.Set(nova.db, 'instance_get', new_return_server)
+
+        def instance_destroy_mock(context, id):
+            self.server_delete_called = True
+        self.stubs.Set(nova.db, 'instance_destroy', instance_destroy_mock)
+
+        with self.assertRaises(webob.exc.HTTPConflict):
+            self.controller.delete(req, FAKE_UUID)
+
 
 class ServerStatusTest(test.TestCase):