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Yes, that's the bug that occurred to me too, for your symptom. I think that including that patch will solve the problem.

From: Miguel A Diaz Corchero
Sent: Friday, 9 October 2015 09:08
To: openstack-operators at lists.openstack.org; Kevin Benton
Subject: Re: [Openstack-operators] Inconsistent neutron namespaces after downtime


Kevin, now I see your patch of this bug

https://review.openstack.org/#/c/218852/

Miguel.




El 09/10/15 09:40, Miguel A Diaz Corchero escribió:
Thanks Kevin.

The router seems correctly schedule to the agent. After doing more tests, I realised the issue also happens when I try to link a new floating-ip. This is the log:
Command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-84a23b9d-cf74-435c-99a1-53b842209c73', 'ip', '-4', 'addr', 'add', '192.168.7.204/32', 'brd', 'None', 'scope', 'global', 'dev', 'qg-ee3cf43a-10']
Exit code: 1
Stdout: ''
Stderr: 'Error: an inet address is expected rather than "None".\n' execute /usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py:75

I see that a broadcast address is expected, for instance

ip netns exec qrouter-84a23b9d-cf74-435c-99a1-53b842209c73 ip -4 addr add 192.168.7.204/32 brd 192.168.7.255 scope global dev qg-ee3cf43a-10

I continue searching for any solution.
Miguel.


El 08/10/15 19:23, Kevin Benton escribió:
Is the router still scheduled to that l3 agent? The issue could be that the router was rescheduled do to the downtime and those are just leftover iptables rules.

On Thu, Oct 8, 2015 at 7:45 AM, Miguel A Diaz Corchero <miguelangel.diaz at externos.ciemat.es<mailto:miguelangel.diaz at externos.ciemat.es>> wrote:
Hi all

After a downtime of neutron I noticed that the floating-ips (already created) are not included as interfaces in qrouter. The iptables in qrouter were perfectly set.

# ip netns exec qrouter-84a23b9d-cf74-435c-99a1-53b842209c73 iptables-save | grep 192.168.7.204
-A neutron-l3-agent-OUTPUT -d 192.168.7.204/32<http://192.168.7.204/32> -j DNAT --to-destination 10.100.1.14
-A neutron-l3-agent-PREROUTING -d 192.168.7.204/32<http://192.168.7.204/32> -j DNAT --to-destination 10.100.1.14
-A neutron-l3-agent-float-snat -s 10.100.1.14/32<http://10.100.1.14/32> -j SNAT --to-source 192.168.7.204
# ip netns exec qrouter-84a23b9d-cf74-435c-99a1-53b842209c73 ip addr | grep 192.168.7.204
# (no ip)

Any idea to force the reload of these (floating-ips) interfaces in qrouters? (restarting the l3 agent doesn't solve the issue)

Miguel.

--
Miguel Angel Díaz Corchero
Systems Administrator / Researcher
c/ Sola nº 1; 10200 TRUJILLO, SPAIN
Tel: +34 927 65 93 17 Fax: +34 927 32 32 37<tel:%2B34%20927%2032%2032%2037>

[CETA-Ciemat logo]<http://www.ceta-ciemat.es/>


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Kevin Benton




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