[Openstack-operators] Live migration neutron issues

Adam Dibiase adibiase at digiumcloud.com
Thu Jan 7 21:00:53 UTC 2016

Yes. I have tried hitting it from an instance on the same L2 network with
the same result.

Just to make things interesting, I cannot be sure yet, but I think I am
seeing a correlation between instances that have been created in Liberty
letting nova create the neutron port (always seems to migrate successfully)
and instances that I have attached a manually created port (always seem to



On Thu, Jan 7, 2016 at 3:36 PM, Mathieu Gagné <mgagne at internap.com> wrote:

> On 2016-01-07 3:28 PM, Adam Dibiase wrote:
> > Greetings,
> >
> > I am having connectivity issues to instances after live migrating
> > between compute nodes. Scenario is as follows:
> >
> >   * Start pinging instance IP
> >   * Send nova live-migration <instancename> <computenode>
> >   * Once nova reports the pause/resume on the new compute node after
> >     migration, ping replies stop
> >   * Instance migrates successfully and I can hit it via VNC console, but
> >     no network connectivity
> >   * If I live migrate it back to losing compute node, it will still NOT
> >     restore network connectivity
> >   * The only way to restore network is to nova stop/start or nova reboot
> >     instance
> >   * When the instance comes back up, I am able to hit it again on the
> >     new compute node
> >
> > I have checked to see if the neutron port is showing the new
> > binding:host_id, ovs shows the correct port for instance on new compute
> > node, and no other errors present in the logs.
> >
> > I am running Liberty with cinder FYI. Anyone else having similar issues?
> >
> Have you tried starting another instance on the same L2 network and ping
> from there once it's migrated? This is to make sure it's not an issue
> with ARP caching on a device between you and the instance.
> --
> Mathieu
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