** Changed in: neutron (Ubuntu)
Status: Triaged => Fix Committed
** Changed in: neutron (Ubuntu)
Assignee: (unassigned) => Corey Bryant (corey.bryant)
** Changed in: neutron (Ubuntu)
Importance: Undecided => High
** Summary changed:
- trusty/icehouse neutron-plugin-openvswitch-agent: lvm.tun_ofports.remove
crashes with KeyError
+ [SRU] trusty/icehouse neutron-plugin-openvswitch-agent:
lvm.tun_ofports.remove crashes with KeyError
** Description changed:
+ [Impact]
+ Neutron OVS breaks with unhandled exceptions on compute nodes.
+
+ [Test Case]
+ For reproduction see the original bug description below.
+
+ [Regression Potential]
+
+ The backported patch is very straightforward, with a few minor conflicts
+ noted in the patch.
+
+ -------------
+
+ Original bug description:
+
Filing this on ubuntu/neutron package, as neutron itself is EOL'd for
Icehouse.
FYI this is a nonHA icehouse/trusty deploy using serverteam's juju
charms.
On one of our production environments with a rather high rate of API
calls, (sp for transient VMs from CI), we frequently get neutron OVS
breakage on compute nodes¹, which we've been able to more or less
correlate with the following alike errors at /var/log/neutron
/openvswitch-agent.log:
2016-01-07 06:33:48.917 18357 TRACE neutron.openstack.common.rpc.amqp File
"/usr/lib/python2.7/dist-packages/neutron/plugins/openvswitch/agent/ovs_neutron_agent.py",
line 399, in _del_fdb_flow
2016-01-07 06:33:48.917 18357 TRACE neutron.openstack.common.rpc.amqp
lvm.tun_ofports.remove(ofport)
2016-01-07 06:33:48.917 18357 TRACE neutron.openstack.common.rpc.amqp
KeyError: '13'
Detailed log: http://paste.ubuntu.com/14431656/ - note the same time of
occurrence on the 3 diff compute nodes shown there.
¹ What we then observe are missing are missing tun_ids from
- ovs-ofctl dump-flows br-tun
+ ovs-ofctl dump-flows br-tun
ie provider:segmentation_id not present at the compute node for a VM with a
neutron network that has it.
Afaics this had been fixed upstream at ( lp#1421105 ):
https://git.openstack.org/cgit/openstack/neutron/commit/?id=841b2f58f375df53b380cf5796bb31c82cd09260
, please consider backporting it to Icehouse, it's a pretty trivial fix.
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https://bugs.launchpad.net/bugs/1531963
Title:
[SRU] trusty/icehouse neutron-plugin-openvswitch-agent:
lvm.tun_ofports.remove crashes with KeyError
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