I don't see in the documentation (probably I didn't check all of it) that an OpenStack version upgrade doesn't imply other library/modules/services upgrade. In this case, you will need to bump the OVN/OVS version, keeping the same OVS/NB/SB information (probably not the same database structures).

In any case, I'll try to make the Neutron server compatible with both scenarios, but that will take some time to implement (if possible).

On Thu, Oct 6, 2022 at 6:13 PM Jeremy Stanley <fungi@yuggoth.org> wrote:
On 2022-10-06 17:08:18 +0200 (+0200), Rodolfo Alonso Hernandez wrote:
[...]
> I've opened [3]. The default OVN version installed in the CI, using Ubuntu
> 20.04, is v20.03, that is a bit old. I've proposed to bump to v21.06,
> extensively tested in the Neutron CI. Any tempest job from any project is
> inherited from this one.
>
> Once we have migrated to Ubuntu 22.04 during this cycle, we'll remove this
> forced OVN installation from source.
[...]

What's the implication for upgrades? Historically, we've needed the
software to be operable on the prior platform (upgrade OpenStack
from Zed to 2023.1/Antelope, then upgrade Ubuntu from Focal to
Jammy). Now with SLURP in the picture, we'll even need OpenStack
2023.2/B working on Focal before upgrading to Jammy, right?
--
Jeremy Stanley