[openstack-dev] [neutron][upgrades] Potential issues when performing Neutron upgrades

Russell Bryant rbryant at redhat.com
Mon Jul 13 13:33:46 UTC 2015

On 07/13/2015 04:09 AM, Kevin Benton wrote:
>>because you won't have to run Neutron agents on compute nodes anymore.
> How will upgrades work for OVN?

We haven't written anything down yet, but here's what I expect.

Right now we're still changing the db schema however is needed without
messing with versioning.  As we get to "production ready", I expect
we'll start being strict about only making backwards compatible ovsdb
schema changes to make upgrades easier.

There are 2 central components - ovn-northd and ovsdb-server - that
would be upgraded first, which I would expect to be done at the same
time as upgrading your Neutron control plane.  As long as any ovsdb
schema changes are backwards compatible, you could do rolling-upgrades
of ovn-controller on compute or network nodes.

Russell Bryant

More information about the OpenStack-dev mailing list