openstack/neutron
Code Issues Proposed changes

OVS agent should fail if it can't get DVR mac address

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Currently agent will fall back to non-dvr mode in case it can't.
However neutron server does not check dvr mode of ovs agents when
scheduling routers. So in a DVR enabled cluster all ovs agents
should run in DVR mode. Otherwise it will lead to undefined
behavior which is hard to debug.

Closes-Bug: #1536110
Change-Id: I6c31aabf1852c688e9c27fc1859d3fdd830caa68
This commit is contained in:
Oleg Bondarev 2016-01-20 13:53:20 +03:00 committed by Brian Haley
parent 893961c0d3
commit e2a37be73d
2 changed files with 18 additions and 19 deletions
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18
neutron/plugins/ml2/drivers/openvswitch/agent/ovs_dvr_neutron_agent.py
View File

@ -13,6 +13,8 @@
# License for the specific language governing permissions and limitations
# under the License.
import sys
from oslo_config import cfg
from oslo_log import log as logging
import oslo_messaging
@ -165,20 +167,16 @@ class OVSDVRNeutronAgent(object):
try:
self.get_dvr_mac_address_with_retry()
except oslo_messaging.RemoteError as e:
LOG.warning(_LW('L2 agent could not get DVR MAC address at '
'startup due to RPC error. It happens when the '
'server does not support this RPC API. Detailed '
'message: %s'), e)
LOG.error(_LE('L2 agent could not get DVR MAC address at '
'startup due to RPC error. It happens when the '
'server does not support this RPC API. Detailed '
'message: %s'), e)
except oslo_messaging.MessagingTimeout:
LOG.error(_LE('DVR: Failed to obtain a valid local '
'DVR MAC address - L2 Agent operating '
'in Non-DVR Mode'))
'DVR MAC address'))
if not self.in_distributed_mode():
# switch all traffic using L2 learning
# REVISIT(yamamoto): why to install the same flow as
# setup_integration_br?
self.int_br.install_normal()
sys.exit(1)
def get_dvr_mac_address_with_retry(self):
# Get the local DVR MAC Address from the Neutron Server.

19
neutron/tests/unit/plugins/ml2/drivers/openvswitch/agent/test_ovs_neutron_agent.py
View File

@ -2599,10 +2599,10 @@ class TestOvsDvrNeutronAgent(object):
side_effect=oslo_messaging.RemoteError),\
mock.patch.object(self.agent, 'int_br', new=int_br),\
mock.patch.object(self.agent.dvr_agent, 'int_br', new=int_br):
self.agent.dvr_agent.get_dvr_mac_address()
self.assertIsNone(self.agent.dvr_agent.dvr_mac_address)
self.assertFalse(self.agent.dvr_agent.in_distributed_mode())
self.assertEqual([mock.call.install_normal()], int_br.mock_calls)
with testtools.ExpectedException(SystemExit):
self.agent.dvr_agent.get_dvr_mac_address()
self.assertIsNone(self.agent.dvr_agent.dvr_mac_address)
self.assertFalse(self.agent.dvr_agent.in_distributed_mode())
def test_get_dvr_mac_address_retried(self):
valid_entry = {'host': 'cn1', 'mac_address': 'aa:22:33:44:55:66'}
@ -2633,11 +2633,12 @@ class TestOvsDvrNeutronAgent(object):
mock.patch.object(utils, "execute"),\
mock.patch.object(self.agent, 'int_br', new=int_br),\
mock.patch.object(self.agent.dvr_agent, 'int_br', new=int_br):
self.agent.dvr_agent.get_dvr_mac_address()
self.assertIsNone(self.agent.dvr_agent.dvr_mac_address)
self.assertFalse(self.agent.dvr_agent.in_distributed_mode())
self.assertEqual(self.agent.dvr_agent.plugin_rpc.
get_dvr_mac_address_by_host.call_count, 5)
with testtools.ExpectedException(SystemExit):
self.agent.dvr_agent.get_dvr_mac_address()
self.assertIsNone(self.agent.dvr_agent.dvr_mac_address)
self.assertFalse(self.agent.dvr_agent.in_distributed_mode())
self.assertEqual(self.agent.dvr_agent.plugin_rpc.
get_dvr_mac_address_by_host.call_count, 5)
def test_dvr_mac_address_update(self):
self._setup_for_dvr_test()