From my experience with upgrading from 6 to 7, it's a lot of hassle, because the upgrade process only takes care of base the programs.

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 _______________________________________________ Rdo-list mailing list Rdo-list(a)redhat.com https://www.redhat.com/mailman/listinfo/rdo-list

From: "Cristian Falcas" <cristi.falcas(a)gmail.com&gt; To: "Chris" <contact(a)progbau.de&gt; You should move them to other compute nodes: http://docs.openstack.org/openstack-ops/content/maintenance.html

On Tue, Dec 16, 2014 at 11:59 AM, Chris <contact(a)progbau.de&gt; wrote: > Hi, > > What about the Instances running on the Compute Nodes? It's totally not an > option to "lose" the existing Instances. > > -----Original Message----- > From: Cristian Falcas [mailto:cristi.falcas@gmail.com] > Sent: Tuesday, December 16, 2014 14:47 > To: Chris > Cc: rdo-list(a)redhat.com > Subject: Re: [Rdo-list] Upgrade from Icehouse to Juno on Centos 6.5 > > I think it will be better to redeploy the compute nodes from scratch. > Juno is supported on el7 only. > > From my experience with upgrading from 6 to 7, it's a lot of hassle, > because the upgrade process only takes care of base the programs. > After the upgrade you will have to upgrade/downgrade/remove manually the > packages that where not updated. > > Best regards, > Cristian Falcas > > On Tue, Dec 16, 2014 at 6:46 AM, Chris <contact(a)progbau.de&gt; wrote: >> 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 >> >> >> >> >> >> >> _______________________________________________ >> Rdo-list mailing list >> Rdo-list(a)redhat.com >> https://www.redhat.com/mailman/listinfo/rdo-list >> > > _______________________________________________ Rdo-list mailing list Rdo-list(a)redhat.com https://www.redhat.com/mailman/listinfo/rdo-list

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(a)progbau.de&gt; Date: Monday, December 15, 2014 at 9:46 PM To: &quot;rdo-list(a)redhat.com&quot; <rdo-list(a)redhat.com&gt; 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 _______________________________________________ Rdo-list mailing list Rdo-list(a)redhat.com https://www.redhat.com/mailman/listinfo/rdo-list

Yep, I had the same experience. I ended up building an “after upgrade” script that did all the cleanup. It’s definitely not perfect.

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@godaddy.com] Sent: Thursday, December 18, 2014 02:50 To: Cristian Falcas Cc: Chris; rdo-list(a)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(a)gmail.com&gt; 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(a)godaddy.com&gt; >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(a)progbau.de&gt; >> Date: Monday, December 15, 2014 at 9:46 PM >> To: &quot;rdo-list(a)redhat.com&quot; <rdo-list(a)redhat.com&gt; >> 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 >> >> >> >> >> >> >> _______________________________________________ >> Rdo-list mailing list >> Rdo-list(a)redhat.com >> https://www.redhat.com/mailman/listinfo/rdo-list >>