[Rdo-list] [Openstack] Upgrade from Icehouse to Juno on Centos 6.5

[Michael Dorman]

We’re running Icehouse on CentOS7, yes.  But we had to rebuild all the OS 
packages for el7 (we do our own packaging because we maintain some local 
packages.  Using Anvil and based loosely on the RDO builds.)  All that 
stuff has to be uplifted, because CentOS7 is Python 2.7, where as 6 is on 
2.6.

I can’t speak directly about mixed versions across the different services, 
but I believe it’s possible.  I know of people running Juno keystone with 
everything else Icehouse, for example.

Mike





On 12/18/14, 3:28 AM, "Chris" <contact at progbau.de> wrote:

>Hi 
>
>Thanks all for your input so far! 
>
>So for me understanding things correct, Icehouse is running on CentOS7? 
>So I can upgrade the OS beforehand, without touching the OpenStack 
>installation.
>Is it possible to have a part of the compute nodes and the management 
>services (keystone, nova, neutron etc.) in different versions 
>(Icehouse/Juno)?
>We would start the upgrade on the compute nodes but of course not all at 
>the same time, are the updated ones still functional?
>
>Cheers
>Chris
>
>-----Original Message-----
>From: Michael Dorman [mailto:mdorman at godaddy.com] 
>Sent: Thursday, December 18, 2014 02:50
>To: Cristian Falcas
>Cc: Chris; rdo-list at redhat.com
>Subject: Re: [Rdo-list] [Openstack] Upgrade from Icehouse to Juno on 
>Centos 6.5
>
>Yep, I had the same experience.  I ended up building an “after upgrade” 
>script that did all the cleanup.  It’s definitely not perfect.
>
>
>
>
>On 12/17/14, 7:16 PM, "Cristian Falcas" <cristi.falcas at gmail.com> wrote:
>
>>Well, I used the same tool, but, like I said, after the upgrade I had 
>>to do a lot of cleanup because of mixed packages (2l6 and el7).
>>
>>I'm glad to see that it's working for you.
>>
>>
>>On Wed, Dec 17, 2014 at 6:29 PM, Michael Dorman <mdorman at godaddy.com>
>>wrote:
>>> Hi Chris,
>>>
>>> We haven’t yet gone to Juno, but in preparation for that we’ve been 
>>> upgrading to CentOS 7.  I have been using the CentOS Upgrade Tool, 
>>> the process described here:
>>> http://wiki.centos.org/TipsAndTricks/CentOSUpgradeTool
>>>
>>> It’s time consuming and causes 45-60min of downtime per server.   But 
>>>once
>>> it’s done it’s thing, it seems to be working well.
>>>
>>> Mike
>>>
>>>
>>> From: Chris <contact at progbau.de>
>>> Date: Monday, December 15, 2014 at 9:46 PM
>>> To: "rdo-list at redhat.com" <rdo-list at redhat.com>
>>> Subject: [Openstack] Upgrade from Icehouse to Juno on Centos 6.5
>>>
>>> Hello
>>>
>>>
>>>
>>> We have an relatively big OpenStack setup (> 150 Compute Nodes) based 
>>> on CentOS 6.5 with the RDO Icehouse release.
>>>
>>> We now considering an upgrade to Juno, is there a best practice out 
>>>there  how to do it and how is it with the depending CentOS upgrade to 
>>>6.6 or even  7.0?
>>>
>>>
>>>
>>> Any help is appreciated!
>>>
>>>
>>>
>>> Thanks,
>>>
>>> Chris
>>>
>>>
>>>
>>>
>>>
>>>
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>