Open Stack

> 
> Yes, you can run mismatched versions of openstack projects.  In general move away from thinking of openstack as a single system that must be upgraded in lock-step and think of openstack as a loosely coupled individual set of projects.  Where you can run mismatched versions.  Possible to even run say: Master version of keystone, 2014.2.2 version of nova/neutron and 2014.1.2 version of heat (Note: I have no clue if that config actually works - assuming all those versions supplied the required features it *should* work.)

We've had luck mismatching major versions as outlined above. Specifically, running Juno (2014.2.x) versions of heat/ceilometer with Icehouse (2014.1.x) versions of everything else. But, also to Kris's point, I'd probably be careful to keep nova/neutron in pretty close lockstep as there's a lot of dependencies between the two.

I should also point out, doing the above creates some logistical issues. Specifically: ceilometer-compute-agent needs to be juno version, but it runs on the compute nodes so you need to be careful about dependencies between it and nova-compute, the ovs-agent and whatever other things you've got running on the node. This was something we discussed a little bit at the operators meet-up in Philly (venvs, VMs, containers, etc.), but it's worth pointing out that in some cases it's possible you'll run into similar situations with minor versions' requirements as well.

-- Kevin

> ____________________________________________
>  
> Kris Lindgren
> Senior Linux Systems Engineer
> GoDaddy, LLC.
> 
> 
> From: Daniel Comnea <comnea.dani at gmail.com>
> Date: Monday, March 30, 2015 at 1:19 PM
> To: Daniel Comnea <comnea.dani at gmail.com>
> Cc: "openstack-operators at lists.openstack.org" <openstack-operators at lists.openstack.org>, "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org>
> Subject: Re: [Openstack-operators] [Openstack-dev][all] how to apply security/back-ported release to Icehouse production
> 
> No thoughts?
> 
> 
> 
> On Sat, Mar 28, 2015 at 10:35 PM, Daniel Comnea <comnea.dani at gmail.com> wrote:
> Hi all,
> 
> Can anyone shed some light as to how you upgrade/ applies the security/back-ported patches?
> 
> E.g  - let's say i already have a production environment running Icehouse 2014.1 as per the link [1] and i'd like to upgrade it to latest Icehouse release 2014.1.4.
> 
> Also do you have to go via sequential process like
> 
> 2014.1 -> 2014.1.1 -> 2014.1.2 -> 2014.1.3 -> 2014.4 or i can jump from 2014.1 to 2014.1.4?
> 
> And the last questions is: can i cherry pick which bugs part of a project to pull? Can i pull only 1 project - e.g HEAT from latest release 2014.1.4?
> 
> 
> Thanks,
> Dani
> 
> [1] https://wiki.openstack.org/wiki/Releases
> 
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