On Thu, Nov 15, 2018 at 11:31 AM Ben Pfaff <[email protected]> wrote:
>
> On Thu, Nov 15, 2018 at 11:07:11AM -0800, Han Zhou wrote:
> > From: Han Zhou <[email protected]>
> >
> > When adding a new chassis, if there is an old chassis with same IP
> > existed in Encap table, it is allowed to be added today. However,
> > allowing it to be added results in problems:
> >
> > 1. The new chassis cannot work because none of the other chassises
> >    are able to create tunnel to it, because of the IP confliction
> >    with already existed tunnel to the old chassis.
> >
> > 2. All the other chassises will continuously retry creating the tunnel
> >    and complaining about the error.
> >
> > So, instead of hiding the problem, it is better to expose it while
> > trying to add the second chassis with duplicated IP. This patch
> > ensures it from the ovsdb schema.
> >
> > Signed-off-by: Han Zhou <[email protected]>
> > ---
> > v2 -> v3: update NEWS for the potential DB upgrading failure
>
> Thanks a lot for adding some upgrade information.
>
> It's probably better to put detailed information like this for OVN
> upgrades in Documentation/intro/install/ovn-upgrades.rst.  Then NEWS
> could point to that advice.
>
> Thanks,
>
> Ben.

Makes sense! Please check v4:
https://mail.openvswitch.org/pipermail/ovs-dev/2018-November/353981.html
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