[ovs-dev] [PATCH v7 0/5] ovn: Add HA chassis group and 'external' port

Numan Siddique nusiddiq at redhat.com
Tue Apr 16 17:22:28 UTC 2019


On Tue, Apr 16, 2019 at 10:39 PM Ben Pfaff <blp at ovn.org> wrote:

> On Thu, Mar 28, 2019 at 11:39:17AM +0530, nusiddiq at redhat.com wrote:
> > From: Numan Siddique <nusiddiq at redhat.com>
> >
> > This patch series adds a generic HA chassis group support in OVN
> > deprecating the existing Gateway chassis support. The final patch
> > of the series adds the 'external' port support in OVN.
> > The 'external' port patch addresses the review comments from Han Zhou
> > which he provided when 'external' port patch was submitted without
> > the HA support.
> >
> > A generic HA chassis group support is added so that both the distributed
> > logical router ports (providing gateway functionality) and 'external'
> > ports can use it for HA and also to simplify the existing HA code
> > (which seems to be a bit complicated).
> >
> > To support HA, BFD is configured on tunnel ports. And even though
> > 'external' ports are expected to be used with the logical
> > switches having localnet ports (representing physical networks),
> > BFD is used for now since each chassis uses geneve tunnels with
> > all other chassis in the OVN cluster.
>
> Thanks.  I applied this to master.
>
> I am uncertain whether this introduces upgrade issues.  If so, then we
> should add some explanation for users to explain how to upgrade safely.
>
>
Thanks for applying the series.

I think it would have some upgrade issues if ovn-controllers are upgraded
first. Since it will no
longer look into the 'Gateway_Chassis' table in SB DB. And this would
result in some downtime until
ovn-northd and ovn db servers are upgraded.

I will send a patch to explain this.

Thanks for pointing this out.

Regards
Numan




> Thanks,
>
> Ben.
>


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