openstack/neutron
Code Issues Proposed changes

Do state report after setting start_flag on OVS restart

Browse Source 
This fixes race condition leading to lack of fdb entries
on agent after OVS restart, if agent managed to handle all ports
before sending state report with start_flag set to True.

Change-Id: I943f8d805630cdfbefff9cff1fb4bce89210618b
Closes-Bug: #1808136
This commit is contained in:
Oleg Bondarev 2018-12-12 15:11:43 +04:00
parent 4b3e736483
commit 3995abefb1
2 changed files with 9 additions and 2 deletions
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3
neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py
View File

@ -2071,6 +2071,9 @@ class OVSNeutronAgent(l2population_rpc.L2populationRpcCallBackTunnelMixin,
self.setup_tunnel_br()
self.setup_tunnel_br_flows()
self.agent_state['start_flag'] = True
# Force state report to avoid race condition
# with l2pop fdb entries update
self._report_state()
if self.enable_distributed_routing:
self.dvr_agent.reset_ovs_parameters(self.int_br,
self.tun_br,

8
neutron/tests/unit/plugins/ml2/drivers/openvswitch/agent/test_ovs_neutron_agent.py
View File

@ -2049,7 +2049,9 @@ class TestOvsNeutronAgent(object):
mock.patch.object(
self.mod_agent.OVSNeutronAgent,
'_reset_tunnel_ofports') as reset_tunnel_ofports, \
mock.patch.object(self.agent.ovs.ovsdb, 'idl_monitor'):
mock.patch.object(self.agent.ovs.ovsdb, 'idl_monitor'),\
mock.patch.object(self.agent.state_rpc,
'report_state') as report_st:
log_exception.side_effect = Exception(
'Fake exception to get out of the loop')
devices_not_ready = set()
@ -2097,7 +2099,9 @@ class TestOvsNeutronAgent(object):
self.assertTrue(setup_tunnel_br_flows.called)
self.assertTrue(setup_tunnel_br.called)
if self.agent.enable_tunneling:
self.assertTrue(self.agent.agent_state.get('start_flag'))
self.agent.agent_state['start_flag'] = True
report_st.assert_called_once_with(
self.agent.context, self.agent.agent_state, True)
def test_ovs_status(self):
self._test_ovs_status(constants.OVS_NORMAL,