[Openstack-operators] Neutron getting stuck creating namespaces
zioproto at gmail.com
Tue Nov 24 09:14:46 UTC 2015
we also had problems with namespaces in Juno. Maybe a little different
than what you describe.
we are running about 250 namespaces in our network node. When we
reboot the network node we observe that some namespaces have qr-* and
qg-* interfaces missing.
we believe that is because the control plane in neutron juno performs
very badly. This is probably fixed in Kilo.
to work around it, after the network node is up and running, we do
reset the namespaces that have interfaces missing:
neutron router-update <UUID> --admin-state-up false
neutron router-update <UUID> --admin-state-up true
2015-11-24 9:51 GMT+01:00 Xav Paice <xavpaice at gmail.com>:
> Neutron is Juno, on Trusty boxes with the 3.19 LTS kernel. We're in the
> process of updating to Kilo, and onwards to Liberty.
> On 24 November 2015 at 21:24, Saverio Proto <zioproto at gmail.com> wrote:
>> Hello Xav,
>> what version of Openstack are you running ?
>> thank you
>> 2015-11-23 20:04 GMT+01:00 Xav Paice <xavpaice at gmail.com>:
>> > Hi,
>> > Over the last few months we've had a few incidents where the process to
>> > create network namespaces (Neutron, OVS) on the network nodes gets
>> > 'stuck'
>> > and prevents not only the router it's trying to create from finishing,
>> > but
>> > all further namespace operations too.
>> > This has usually finished up with either us rebooting the node pretty
>> > fast
>> > afterwards, or the node rebooting itself.
>> > It looks very much like we're affected by
>> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1403152 but the
>> > notes
>> > say it's fixed in the kernel we're running. I've asked the clever
>> > person
>> > who checked it to make some extra notes in the bug report.
>> > It looks very much like when we have a bunch of load on the box the
>> > thing is
>> > more likely to trigger - I was wondering if other ops have a max ratio
>> > of
>> > routers per network node? I would have thought our current max of 150
>> > routers per node would be pretty light, but with the dhcp namespaces as
>> > well
>> > that's ~450 namespaces on a box and maybe that's an issue?
>> > Thanks
>> > _______________________________________________
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>> > OpenStack-operators at lists.openstack.org
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