Merge "Fullstack: init trunk agent's driver only when necessary" into stable/pike

neutron/tests/fullstack/cmd/ovs_agent.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# Copyright 2017 OVH SAS
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import sys
+
+from oslo_config import cfg
+
+from neutron.services.trunk.drivers.openvswitch.agent \
+    import driver as trunk_driver
+from neutron.tests.common.agents import ovs_agent
+
+
+def monkeypatch_init_handler():
+    original_handler = trunk_driver.init_handler
+
+    def new_init_handler(resource, event, trigger, agent=None):
+        # NOTE(slaweq): make this setup conditional based on server-side
+        # capabilities for fullstack tests we can assume that server-side
+        # and agent-side conf are in sync
+        if "trunk" not in cfg.CONF.service_plugins:
+            return
+        original_handler(resource, event, trigger, agent)
+
+    trunk_driver.init_handler = new_init_handler
+
+
+def main():
+    # TODO(slaweq): this monkepatch will not be necessary when
+    # https://review.openstack.org/#/c/506722/ will be merged and ovsdb-server
+    # ovs-vswitchd processes for each test will be isolated in separate
+    # namespace
+    monkeypatch_init_handler()
+    ovs_agent.main()
+
+
+if __name__ == "__main__":
+    sys.exit(main())

neutron/tests/fullstack/resources/process.py

@@ -207,7 +207,7 @@ class OVSAgentFixture(ServiceFixture):
             process_name=self.NEUTRON_OVS_AGENT,
             exec_name=spawn.find_executable(
                 'ovs_agent.py',
-                path=os.path.join(base.ROOTDIR, 'common', 'agents')),
+                path=os.path.join(fullstack_base.ROOTDIR, 'cmd')),
             config_filenames=config_filenames,
             kill_signal=signal.SIGTERM))
 

neutron/tests/fullstack/test_trunk.py

@@ -91,7 +91,7 @@ class TestTrunkPlugin(base.BaseFullStackTestCase):
         host_desc = [environment.HostDescription(
             l3_agent=False,
             l2_agent_type=constants.AGENT_TYPE_OVS)]
-        env_desc = environment.EnvironmentDescription()
+        env_desc = environment.EnvironmentDescription(service_plugins='trunk')
         env = environment.Environment(env_desc, host_desc)
         super(TestTrunkPlugin, self).setUp(env)
 
@@ -207,6 +207,14 @@ class TestTrunkPlugin(base.BaseFullStackTestCase):
         vm.add_vlan_interface(
             subport['mac_address'], ip_network, subport_network.tag)
 
+    # NOTE(slaweq): As is described in bug
+    # https://bugs.launchpad.net/neutron/+bug/1687709 when more than one
+    # different ovs-agent with enabled trunk driver is running at a time it
+    # might lead to race contitions between them.
+    # Because of that ovs_agent used for fullstack tests is monkeypatched and
+    # loads trunk driver only if trunk service plugin is enabled.
+    # That makes restriction that only a single set of tests with trunk-enabled
+    # services will run at the same time.
     def test_trunk_lifecycle(self):
         """Test life-cycle of a fake VM with trunk port.