Add 'deleted' status check in _poll_for_status

When use command '--poll' to show progress, if the object's staus change
into 'deleted' for some reason, it will lead a endless loop.Becasue there
is no check about 'deleted' status.

For example, when use 'image-create --poll' to create a vm's snapshoot,
if glance's quota is small than the snapshoot, the image will be deleted.

Change-Id: I028e3064b3371f87873d74494c39255775a2c818
Closes-bug:#1470047

novaclient/exceptions.py

@@ -93,6 +93,11 @@ class VersionNotFoundForAPIMethod(Exception):
         return self.msg_fmt % {"vers": self.version, "method": self.method}
 
 
+class InstanceInDeletedState(Exception):
+    """Instance is in the deleted state."""
+    pass
+
+
 class ClientException(Exception):
     """
     The base exception class for all exceptions this library raises.

novaclient/tests/unit/v2/fakes.py

@@ -665,6 +665,8 @@ class FakeHTTPClient(base_client.HTTPClient):
         elif action == 'createImage':
             assert set(body[action].keys()) == set(['name', 'metadata'])
             _headers = dict(location="http://blah/images/456")
+            if body[action]['name'] == 'mysnapshot_deleted':
+                _headers = dict(location="http://blah/images/457")
         elif action == 'os-getConsoleOutput':
             assert list(body[action]) == ['length']
             return (202, {}, {'output': 'foo'})
@@ -1035,6 +1037,16 @@ class FakeHTTPClient(base_client.HTTPClient):
                 "status": "SAVING",
                 "progress": 80,
                 "links": {},
+            },
+            {
+                "id": 3,
+                "name": "My Server Backup Deleted",
+                "serverId": 1234,
+                "updated": "2010-10-10T12:00:00Z",
+                "created": "2010-08-10T12:00:00Z",
+                "status": "DELETED",
+                "fault": {'message': 'Image has been deleted.'},
+                "links": {},
             }
         ]})
 
@@ -1047,6 +1059,9 @@ class FakeHTTPClient(base_client.HTTPClient):
     def get_images_456(self, **kw):
         return (200, {}, {'image': self.get_images_detail()[2]['images'][1]})
 
+    def get_images_457(self, **kw):
+        return (200, {}, {'image': self.get_images_detail()[2]['images'][2]})
+
     def get_images_3e861307_73a6_4d1f_8d68_f68b03223032(self):
         raise exceptions.NotFound('404')
 

novaclient/tests/unit/v2/test_shell.py

@@ -813,6 +813,24 @@ class ShellTest(utils.TestCase):
         self.assertIn('My Server Backup', output)
         self.assertIn('SAVING', output)
 
+    @mock.patch('novaclient.v2.shell._poll_for_status')
+    def test_create_image_with_poll(self, poll_method):
+        self.run_command(
+            'image-create sample-server mysnapshot --poll')
+        self.assert_called_anytime(
+            'POST', '/servers/1234/action',
+            {'createImage': {'name': 'mysnapshot', 'metadata': {}}},
+        )
+        self.assertEqual(1, poll_method.call_count)
+        poll_method.assert_has_calls(
+            [mock.call(self.shell.cs.images.get, '456', 'snapshotting',
+                       ['active'])])
+
+    def test_create_image_with_poll_to_check_image_state_deleted(self):
+        self.assertRaises(
+            exceptions.InstanceInDeletedState, self.run_command,
+            'image-create sample-server mysnapshot_deleted --poll')
+
     def test_image_delete(self):
         self.run_command('image-delete 1')
         self.assert_called('DELETE', '/images/1')

novaclient/v2/shell.py

@@ -583,6 +583,10 @@ def _poll_for_status(poll_fn, obj_id, action, final_ok_states,
             if not silent:
                 print(_("\nError %s server") % action)
             raise exceptions.InstanceInErrorState(obj.fault['message'])
+        elif status == "deleted":
+            if not silent:
+                print(_("\nDeleted %s server") % action)
+            raise exceptions.InstanceInDeletedState(obj.fault['message'])
 
         if not silent:
             print_progress(progress)