[Openstack-operators] Neutron getting stuck creating namespaces
zioproto at gmail.com
Tue Nov 24 08:24:39 UTC 2015
what version of Openstack are you running ?
2015-11-23 20:04 GMT+01:00 Xav Paice <xavpaice at gmail.com>:
> 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?
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