[Openstack-operators] OSA upgrading Ubuntu14.04 Newton to Ubuntu16.04 Ocata

Grant Morley grant at absolutedevops.io
Wed Oct 4 14:42:59 UTC 2017

Hi All,

Just have a quick question regarding upgrading from Newton to Ocata 
using OSA. We have a small installation ( 4 compute. 3 management, 2 
network and some Ceph storage nodes ) And we are looking to upgrade from 
Ubuntu 14.04 Newton to Ubuntu 16.04 Ocata.

Does anyone have any good tips on how to do this at all? We are not sure 
whether it is best to decommission a single node at a time, upgrade that 
to Ubuntu 16.04 and then get Ocata installed onto that. Or whether there 
is a better method at all?

We are conscious that if we bootstrap our ansible deployer machine for 
Ocata, it will then not be able to manage the nodes that are running 
14.04 Newton we assume?

Another thing we were thinking was to possibly get some more kit and 
just install Ocata from scratch on that and start to migrate customers 
over, but again we assume would need a separate deployer to do so?.

We would prefer to be able to upgrade both the OS for Ubuntu and 
Openstack to Ocata using our current set up and just wondered if this 
was even possible with OSA? Unfortunately we do not have the budget to 
simply keep on getting more and more kit, so we have to be quite tactile 
about how we do things.

We are going to test this on our dev environment and see what breaks, 
but just wondered if anyone here has come across this already and 
suffered the pain :)

Any suggestions would be much appreciated.

Many thanks,

Grant Morley
Senior Cloud Engineer
Absolute DevOps Ltd
Units H, J & K, Gateway 1000, Whittle Way, Stevenage, Herts, SG1 2FP
www.absolutedevops.io <http://www.absolutedevops.io/> 
grant at absolutedevops.io <mailto:grant at absolutedevops.io> 0845 874 0580
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