Comment 0 for bug 1938685

Recently neutron-ovs-tempest-dvr-ha-multinode-full (non-voting) job start failing often. Usual test fail is:

"Details: (ServersTestJSON:setUpClass) Server 74743462-a419-4f89-a92c-0e99bc185581 failed to reach ACTIVE status and task state "None" within the required time (196 s). Current status: BUILD. Current task state: spawning."

Looking at logs I see that the reason is ofctl timeout (300 sec) that causes OVS agent to not process new port(s) in time:

Jul 30 17:33:42.946480 ubuntu-focal-inap-mtl01-0025709340 neutron-openvswitch-agent[82746]: DEBUG neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [None req-7ef93d36-7664-4072-b3d1-677a772a0fc1 None None] fdb_add received {{(pid=82746) fdb_add /opt/stack/neutron/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py:841}}
Jul 30 17:37:46.516378 ubuntu-focal-inap-mtl01-0025709340 neutron-openvswitch-agent[82746]: ERROR neutron.plugins.ml2.drivers.openvswitch.agent.openflow.native.ofswitch [None req-9d8a3325-2d80-41a4-9f3d-184b365b7dfc None None] ofctl request version=0x4,msg_type=0xe,msg_len=None,xid=0xdfcb3e13,OFPFlowMod(buffer_id=4294967295,command=0,cookie=7439791576028281136,cookie_mask=0,flags=0,hard_timeout=0,idle_timeout=0,instructions=[OFPInstructionActions(actions=[OFPActionPopVlan(len=8,type=18), OFPActionOutput(len=16,max_len=0,port=-1,type=0)],type=4)],match=OFPMatch(oxm_fields={'eth_dst': 'fa:16:3e:0f:58:bc', 'vlan_vid': 4113}),out_group=0,out_port=0,priority=20,table_id=60) timed out: eventlet.timeout.Timeout: 300 seconds
Jul 30 17:37:46.530852 ubuntu-focal-inap-mtl01-0025709340 neutron-openvswitch-agent[82746]: ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [None req-9d8a3325-2d80-41a4-9f3d-184b365b7dfc None None] Error while processing VIF ports: RuntimeError: ofctl request version=0x4,msg_type=0xe,msg_len=None,xid=0xdfcb3e13,OFPFlowMod(buffer_id=4294967295,command=0,cookie=7439791576028281136,cookie_mask=0,flags=0,hard_timeout=0,idle_timeout=0,instructions=[OFPInstructionActions(actions=[OFPActionPopVlan(len=8,type=18), OFPActionOutput(len=16,max_len=0,port=-1,type=0)],type=4)],match=OFPMatch(oxm_fields={'eth_dst': 'fa:16:3e:0f:58:bc', 'vlan_vid': 4113}),out_group=0,out_port=0,priority=20,table_id=60) timed out
Jul 30 17:37:46.530852 ubuntu-focal-inap-mtl01-0025709340 neutron-openvswitch-agent[82746]: ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent Traceback (most recent call last):
Jul 30 17:37:46.530852 ubuntu-focal-inap-mtl01-0025709340 neutron-openvswitch-agent[82746]: ERROR neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent File "/opt/stack/neutron/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/ofswitch.py", line 91, in _send_msg
...

Not sure why ofctl timeouts, but maybe default 300 is too much