For evacuation, ignore if task_state is not None

ignore instance task state and continue with vm evacutaion.

Closes-Bug: #1978983
Change-Id: I5540df6c7497956219c06cff6f15b51c2c8bc29d
(cherry picked from commit db919aa15f24c0d74f3c5c0e8341fad3f2392e57)
(cherry picked from commit 6d61fccb8455367aaa37ae7bddf3b8befd3c3d88)
(cherry picked from commit 8e9aa71e1a4d3074a94911db920cae44334ba2c3)
(cherry picked from commit 0b8124b99601e1aba492be8ed564f769438bd93d)
(cherry picked from commit 3224ceb3fffc57d2375e5163d8ffbbb77529bc38)

1 files changed, 8 insertions, 15 deletions

diff --git a/nova/tests/functional/regressions/test_bug_1978983.py b/nova/tests/functional/regressions/test_bug_1978983.py
index 77c384dce9..b9a921b454 100644
--- a/nova/tests/functional/regressions/test_bug_1978983.py
+++ b/nova/tests/functional/regressions/test_bug_1978983.py
@@ -13,10 +13,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-
 from nova import test
 from nova.tests import fixtures as nova_fixtures
-from nova.tests.functional.api import client
 from nova.tests.functional import fixtures as func_fixtures
 from nova.tests.functional import integrated_helpers
 from nova.tests.unit.image import fake
@@ -45,6 +43,7 @@ class EvacuateServerWithTaskState(
         api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
             api_version='v2.1'))
         self.api = api_fixture.admin_api
+        self.api.microversion = 'latest'
 
         self.src = self._start_compute(host='host1')
         self.dest = self._start_compute(host='host2')
@@ -54,26 +53,20 @@ class EvacuateServerWithTaskState(
         """
         server = self._create_server(networks=[])
 
-        self.api.microversion = 'latest'
         server = self._wait_for_state_change(server, 'ACTIVE')
-        self.assertEqual('host1', server['OS-EXT-SRV-ATTR:host'])
+        self.assertEqual(self.src.host, server['OS-EXT-SRV-ATTR:host'])
 
         # stop host1 compute service
         self.src.stop()
+        self.api.put_service_force_down(self.src.service_ref.uuid, True)
 
         # poweroff instance
         self._stop_server(server, wait_for_stop=False)
         server = self._wait_for_server_parameter(
             server, {'OS-EXT-STS:task_state': 'powering-off'})
 
-        # FIXME(auniyal): As compute service is down in source node
-        # instance is stuck at powering-off, evacuation fails with
-        # msg: Cannot 'evacuate' instance <instance-id> while it is in
-        # task_state powering-off (HTTP 409)
-
-        ex = self.assertRaises(
-            client.OpenStackApiException,
-            self._evacuate_server,
-            server,
-            expected_host=self.dest.host)
-        self.assertEqual(409, ex.response.status_code)
+        # evacuate instance
+        server = self._evacuate_server(
+            server, expected_host=self.dest.host
+        )
+        self.assertEqual(self.dest.host, server['OS-EXT-SRV-ATTR:host'])