[openstack-dev] [nova][neutron][upgrade] Grenade multinode partial upgrade - Nova metadata failure

Sean M. Collins sean at coreitpro.com
Mon Feb 22 14:37:56 UTC 2016

Ihar Hrachyshka wrote:
> I guess the next steps are:
> - monitoring the job for a week, making sure it’s stable enough (comparing
> failure rate to non-partial grenade job?);
> - if everything goes fine, propose project-config change to make it voting;
> - propose governance patch to enable rolling-upgrade tag for neutron repo (I
> believe not for *aas repos though?).

Agree - I believe this is our next steps.

> I guess with that we would be able to claim victory for the basic 'server
> vs. agent’ part of rolling scenario. Right?

Correct - it also tests "new agent vs. old agent" since the
primary node runs the neutron agent, upgrades it, while the subnode runs the neutron
agent that is not upgraded.

I think there could be some work done to ensure that instances are
scheduled on both the primary node and the subnode so we get more

> Follow up steps would probably be:
> - look at enabling partial job for DVR flavour;

Agree - I guess we can resurrect https://review.openstack.org/#/c/250215 ?

> - proceed on objectification of neutron db layer to open doors for later
> mixed server versions in the same cluster.

Sounds good.

> Anything I missed?

I think that's a good starting point. If we think of of other things we
can add them.

> Also, what do we do with non-partial flavour of the job? Is it staying?

Is it useful? I think operators are more likely to upgrade
components of a cluster incrementally - so the partial jobs are going to
reflect the reality on the ground better.

Sean M. Collins

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