[sos-devel] [PATCH] [plugins/openstack_neutron] Add netns dumps for DVR namespaces

[Bryn M. Reeves]

On Fri, Nov 28, 2014 at 06:09:44PM +0000, Ma, Stephen B. wrote:
> Hi Bryn,
> 
> The fip and snat namespaces are created by the neutron-l3-agent when it is running in the dvr or dvr_snat mode.  They are not used outside of neutron.

That's still not what I mean ;)

There is nothing to stop *something else* creating namespaces
with those prefixes; therefore we cannot assume that because
we find those prefixes in use that we're looking at a Neutron
DVR configuration. We should only assume that in the case that
we already know that the system is running OpenStack Neutron.
 
> One thing to note is that when Neutron is running on a machine, it does not necessary implies that qdhcp, qrouter, fip, or the snat namespaces are present on the machine.   For example, neutron-l3-agent manages the qrouter, fip, and snat namespaces.  When the agent crashed, these namespaces are left behind.  So if you run sosreport at the time the agent is not running, I would still like to see the information on these 3 namespaces.  The information would provide clues as to what is the problem.

That's not a problem; we can collect data for them regardless
of whether the agent is running or not.

Regards,
Bryn.