[neutron][OVN] Multiple mechanism drivers

Takashi Yamamoto yamamoto at midokura.com
Thu Nov 28 02:12:31 UTC 2019


On Mon, Nov 25, 2019 at 5:00 PM Slawek Kaplonski <skaplons at redhat.com> wrote:
> Hi,
> I think that this may be true that networking-ovn will not work properly
> with other drivers.
> I don't think it was tested at any time.
> Also the problem may be that when You are using networking-ovn than whole
> neutron topology is different. There are different agents for example.
> Please open a bug for that for networking-ovn. I think that networking-ovn team
> will take a look into that.

networking-midonet ignores networks without "midonet" type segments to
avoid interfering other mechanism drivers.
maybe networking-ovn can have something similar.

wrt agents, last time i checked there was no problem with running
midonet agent and ovs agent on the same host, sharing the kernel
so i guess there's no problem with ovn either.

wrt l3, unfortunately neither midonet or ovn have implemented "l3
flavor" thing yet. so you have to choose a single l3 plugin.
iirc, Sam's deployment doesn't use l3 for linuxbridge, right?

> On Mon, Nov 25, 2019 at 04:32:50PM +1100, Sam Morrison wrote:
> > We are looking at using OVN and are having some issues with it in our ML2 environment.
> >
> > We currently have 2 mechanism drivers in use: linuxbridge and midonet and these work well (midonet is the default tenant network driver for when users create a network)
> >
> > Adding OVN as a third mechanism driver causes the linuxbridge and midonet networks to stop working in terms of CRUD operations etc.
> > It looks as if the OVN driver thinks it’s the only player and is trying to do things on ports that are in linuxbridge or midonet networks.
> >
> > Am I missing something here? (We’re using Stein version)
> >
> >
> > Thanks,
> > Sam
> >
> >
> >
> --
> Slawek Kaplonski
> Senior software engineer
> Red Hat

More information about the openstack-discuss mailing list