Live migration garp

Ignazio Cassano ignaziocassano at gmail.com
Thu Apr 30 09:56:19 UTC 2020


Thank you Michal.
Infact openstack community is working for solving the problem.
Ignazio

Il giorno gio 30 apr 2020 alle ore 11:12 Michal Privoznik <
mprivozn at redhat.com> ha scritto:

> On 4/28/20 9:45 PM, Ignazio Cassano wrote:
> > Hello All, I am facing issues under openstack rocky with last libvirt
> > available on centos 7.
> > There is an open discussione here:
> >
> > https://bugs.launchpad.net/neutron/+bug/1866139
> >
> > About sending garp when an instance live migrate.
> > What must send garp ?
> >
> > The problem is this: when live migrate a vm from a node to another it
> > stops to responds to ping requests. It starts to respond only when it
> > send a network request for example when its chrony daemon pools a server.
> > Anyone could help me, please?
> > Best Regards
> > Ignazio
> >
>
> Actually, I think this is OVS responsibility. On migration libvirt asks
> OVS to dump its internal state into a buffer. This buffer is then
> transferred onto the destination and OVS running there is fed with the
> data. That sounds like the best time for OVS to send the GARP packets.
>
> Michal
>
>
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