Merge "Fix controller worker graceful shutdown" into stable/rocky

devstack/plugin.sh

@@ -332,6 +332,11 @@ function octavia_configure {
         iniset $OCTAVIA_CONF DEFAULT bind_port ${OCTAVIA_HA_PORT}
         iniset $OCTAVIA_CONF DEFAULT bind_host 0.0.0.0
     fi
+
+    # set default graceful_shutdown_timeout to 300 sec (5 minutes)
+    # TODO(gthiemonge) update this value after persistant taskflow commits are
+    # merged
+    iniset $OCTAVIA_CONF DEFAULT graceful_shutdown_timeout 300
 }
 
 function create_mgmt_network_interface {

doc/source/configuration/configref.rst

@@ -26,3 +26,4 @@ Octavia Configuration Options
     oslo.db
     oslo.log
     oslo.messaging
+    cotyledon

etc/octavia.conf

@@ -16,6 +16,9 @@
 #   transport_url = rabbit://<user>:<pass>@server01,<user>:<pass>@server02/<vhost>
 # transport_url =
 
+# How long in seconds to wait for octavia worker to exit before killing them.
+# graceful_shutdown_timeout = 60
+
 [api_settings]
 # bind_host = 127.0.0.1
 # bind_port = 9876

octavia/controller/queue/consumer.py

@@ -46,14 +46,14 @@ class ConsumerService(cotyledon.Service):
         )
         self.message_listener.start()
 
-    def terminate(self, graceful=False):
+    def terminate(self):
         if self.message_listener:
             LOG.info('Stopping consumer...')
             self.message_listener.stop()
-            if graceful:
+
-                LOG.info('Consumer successfully stopped.  Waiting for final '
+            LOG.info('Consumer successfully stopped.  Waiting for final '
-                         'messages to be processed...')
+                     'messages to be processed...')
-                self.message_listener.wait()
+            self.message_listener.wait()
         if self.endpoints:
             LOG.info('Shutting down endpoint worker executors...')
             for e in self.endpoints:

octavia/tests/unit/controller/queue/test_consumer.py

@@ -58,15 +58,4 @@ class TestConsumer(base.TestRpc):
         cons.run()
         cons.terminate()
         mock_rpc_server_rv.stop.assert_called_once_with()
-        self.assertFalse(mock_rpc_server_rv.wait.called)
-
-    @mock.patch.object(messaging, 'get_rpc_server')
-    def test_consumer_graceful_terminate(self, mock_rpc_server):
-        mock_rpc_server_rv = mock.Mock()
-        mock_rpc_server.return_value = mock_rpc_server_rv
-
-        cons = consumer.ConsumerService(1, self.conf)
-        cons.run()
-        cons.terminate(graceful=True)
-        mock_rpc_server_rv.stop.assert_called_once_with()
         mock_rpc_server_rv.wait.assert_called_once_with()

releasenotes/notes/fix-worker-graceful-shutdown-c44b6797637aa1b3.yaml

@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Fix a bug that could interrupt resource creation when performing a graceful
+    shutdown of the controller worker and leave resources in a
+    PENDING_CREATE/PENDING_UPDATE/PENDING_DELETE provisioning status. If the
+    duration of an Octavia flow is greater than the 'graceful_shutdown_timeout'
+    configuration value, stopping the Octavia worker can still interrupt the
+    creation of resources.

tox.ini

@@ -114,7 +114,8 @@ commands =
          --namespace oslo.db \
          --namespace oslo.log \
          --namespace oslo.messaging \
-         --namespace keystonemiddleware.auth_token
+         --namespace keystonemiddleware.auth_token \
+         --namespace cotyledon
 
 [testenv:genpolicy]
 basepython = python3