[Openstack-operators] kilo keystone with liberty nova

Tim Bell Tim.Bell at cern.ch
Wed Jan 6 16:22:51 UTC 2016

We’ve generally done staged upgrades (process documented in http://openstack-in-production.blogspot.com). For a smoother migration, we have split the changes to the service catalog to the latest API versions (e.g. Keystone V2 to V3) from the code upgrade. This allows you to have an easier rollback plan.


However, we’ve always upgraded Nova last so I can’t confirm a newer Keystone than Nova but we’ve certainly had the latest Ceilometer before we upgraded Keystone.




From: Matt Fischer [mailto:matt at mattfischer.com] 
Sent: 06 January 2016 16:27
To: Kevin Bringard (kevinbri) <kevinbri at cisco.com>
Cc: openstack-operators at lists.openstack.org
Subject: Re: [Openstack-operators] kilo keystone with liberty nova


We've done the opposite, newer Keystone with older code. No issues that we've seen.


On Wed, Jan 6, 2016 at 8:15 AM, Kevin Bringard (kevinbri) <kevinbri at cisco.com <mailto:kevinbri at cisco.com> > wrote:

We've even done later versions of keystone with older versions of other stuff (Specifically Kilo Keystone with Juno Glance/Heat and Icehouse everything else)...

The thing I'd watch out for going the other direction is if the newer version of, let's say, nova, requires API calls which aren't present in your older version of Keystone. I can't think of any specific calls off the top of my head, but that'd be the only major read flag which comes to mind.

On 1/5/16, 10:50 PM, "Abel Lopez" <alopgeek at gmail.com <mailto:alopgeek at gmail.com> > wrote:

>We've done things like Icehouse keystone and Juno glance/heat/ceilometer.
>Seems like having older keystone is somewhat safe.
>On Tuesday, January 5, 2016, Marcus Furlong <furlongm at gmail.com <mailto:furlongm at gmail.com> > wrote:
>Just wanted to check if it's possible to have a mixed version
>environment with kilo keystone and e.g. liberty nova.
>Has anyone done this? Any gotchas?
>Marcus Furlong
>OpenStack-operators mailing list
>OpenStack-operators at lists.openstack.org <mailto:OpenStack-operators at lists.openstack.org>  <javascript:;>

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