[Openstack] OpenStack upgrade Icehouse Centos 6 best practice

Remo Mattei Remo at Italy1.com
Mon Aug 17 12:53:45 UTC 2015

Well this can be very time consuming but first thing first
1) how is your installation done?
2) is this an HA env?
3) chaining from 6.x to 7 is good but may not play well 
4) database schema changed from Icehouse to Juno so keep that in mind. 

Then you can start thinking on the upgrades. I know some of my coworker had hard time to upgrade. Recommended is rebuild / migrate. 

> On Aug 17, 2015, at 12:53, Chris <contact at progbau.de> wrote:
> Hello,
> We currently plan to upgrade our Openstack setup from Icehouse to Juno or even Kilo. This also includes a version upgrade on the host based OS from Centos 6.6 to 7.x
> I have some questions regarding the upgrade an hope to learn from your experience.
> First question is, is there a Openstack version compatibility guaranteed within the different releases? The idea behind it to upgrade the different services (compute nodes / management nodes) in separate phases.
> Second, is the live-migration with block-migrate feature compatible between versions. One upgrade solution we currently playing with is to move existing VMs with live-migration & block-migrate (no shared storage) to fresh installed Centos 7 Kilo compute nodes.
> Any best practice tips highly appreciated!
> Cheers,
> Chris
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