14 messages in net.launchpad.lists.openstackRe: [Openstack] A plea from an OpenSt...| From | Sent On | Attachments |
|---|---|---|
| Ryan Lane | Aug 28, 2012 2:25 pm | |
| Gabriel Hurley | Aug 28, 2012 2:38 pm | |
| Troy Toman | Aug 28, 2012 2:58 pm | |
| Michael Still | Aug 28, 2012 3:28 pm | |
| Ryan Lane | Aug 28, 2012 3:50 pm | |
| Ryan Lane | Aug 28, 2012 3:52 pm | |
| Robert Collins | Aug 28, 2012 4:21 pm | |
| Jay Pipes | Aug 28, 2012 11:31 pm | |
| Ryan Lane | Aug 29, 2012 12:10 am | |
| Tim Bell | Aug 29, 2012 1:57 am | |
| stua...@hp.com | Aug 29, 2012 6:21 am | |
| James E. Blair | Aug 29, 2012 8:24 am | |
| Eoghan Glynn | Sep 4, 2012 1:53 am | |
| Thierry Carrez | Sep 4, 2012 3:06 am |
| Subject: | Re: [Openstack] A plea from an OpenStack user | |
|---|---|---|
| From: | Robert Collins (robe...@robertcollins.net) | |
| Date: | Aug 28, 2012 4:21:48 pm | |
| List: | net.launchpad.lists.openstack | |
On Wed, Aug 29, 2012 at 10:52 AM, Ryan Lane <rla...@wikimedia.org> wrote:
There was talk of trying to set up test infrastructure that would roll out Essex
and then upgrade it to Folsom in some automated fashion so we could start
learning where it breaks. Was there any forward momentum on that?
This would be awesome. Wrapping automated tests around upgrades would greatly improve the situation. Most of the issues that ops runs into during upgrades are unexpected changes, which are the same things that will likely be hit when testing upgrades in an automated way.
It would be fascinating (for me at least :)) to know the upgrade process you use - how many stages you use, do you have multiple regions and use one/some as canaries? Does the downtime required to do an upgrade affect you? Do you run skewed versions (e.g. folsom nova, essex glance) or do you do lock-step upgrades of all the components?
For Launchpad we've been moving more and more to a model of permitting temporary skew so that we can do rolling upgrades of the component services. That seems in-principle doable here - and could make it easier to smoothly transition between versions, at the cost of a (small) amount of attention to detail while writing changes to the various apis.
-Rob
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