** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1491922
Title:
ovs agent doesn't configure new ovs-port for an instance
Status in neutron:
Fix Released
Bug description:
in case of massive resource deletion (networks, ports) it may take agent
quite a lot of time to process.
Port delete priocessing is happening during ovs agent periodic task. It takes
agent ~0.25s to process one port deletion.
From the attached log we can see that on a certain iteration the agent had to
process deletion of 1625 ports.
1625 * 0.25 = 406 seconds.
Indeed:
2015-08-29 09:13:46.004 21292 DEBUG
neutron.plugins.openvswitch.agent.ovs_neutron_agent [req-
55e0a577-e03b-4476-9bdd-f5480cfef966 ] Agent rpc_loop -
iteration:25863 - starting polling. Elapsed:0.047 rpc_loop
/usr/lib/python2.7/dist-
packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py:1733
... (ports deletion handling)
2015-08-29 09:20:28.569 21292 DEBUG
neutron.plugins.openvswitch.agent.ovs_neutron_agent
[req-55e0a577-e03b-4476-9bdd-f5480cfef966 ] Agent rpc_loop - iteration:25863 -
port information retrieved. Elapsed:402.612 rpc_loop
/usr/lib/python2.7/dist-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py:1748
... (from here agent starts processing new ports)
402 seconds is somewhat not acceptable. Nova waits for 300 seconds by default
and then fails with vif plugging timeout.
From log we can also see that new ovs port appeared during agent was busy
with ports deletion stuff:
2015-08-29 09:13:52.432 21292 DEBUG neutron.agent.linux.ovsdb_monitor [-]
Output received from ovsdb monitor:
{"data":[["8fd481a4-1267-445b-bedc-f1f6b3a47898","old",null,["set",[]]],["","new","qvoced59c11-1b",76]],"headings":["row","action","name","ofport"]}
_read_stdout
/usr/lib/python2.7/dist-packages/neutron/agent/linux/ovsdb_monitor.py:44
Port deletion handling needs to be optimised on agent side.
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