[Openstack-operators] Safe migrations Liberty to Newton

William Josefsson william.josefson at gmail.com
Sat Nov 12 13:10:32 UTC 2016

Thanks Jay and Matt for sharing advice on the upgrade. I have found
the following documentation for each of the projects, I believe I
should also read the upgrade section in each projects release notes.

Can you please advice if the service DB upgrade order as below makes
sense, not sure what to do with the rabbitmq service?

I was looking for something more guided step by step upgrade, and
found these two links. Please share if you've seen any useful upgrade
posts covering Liberty->Mitaka;   Mitaka->Newton. thx will


1. Keystone, http://docs.openstack.org/developer/keystone/upgrading.html

2. Glance, Missing upgrade documentation?

3. Nova, http://docs.openstack.org/developer/nova/upgrade.html#

4. Neutron, http://docs.openstack.org/developer/neutron/devref/upgrade.html#

5. Cinder, http://docs.openstack.org/developer/cinder/devref/rolling.upgrades.html#

On Sat, Nov 12, 2016 at 9:13 AM, Matt Riedemann
<mriedem at linux.vnet.ibm.com> wrote:
> On 11/11/2016 9:45 AM, Jay Pipes wrote:
>> On 11/11/2016 08:38 AM, William Josefsson wrote:
>>> Hi everyone, I have been quite concerned about how to migrate 50
>>> projects and total 100 instances on Liberty/CentOS72, to Newton.
>>> My storage backend is CEPH. Can anyone advice if I can as a safe
>>> migration path, do a fresh install of Newton on additional hardware.
>>> The new Newton cluster connecting to same old DB and Storage(CEPH
>>> cluster). And then live-migrate to the new hardware?
>>> Please advice if this approach works. Thx will
>> The only safe and supported way to upgrade OpenStack is to do an N-1 to
>> N upgrade.
>> Upgrade your controller installation to Mitaka, run your migrations (DB
>> and online data migrations) then upgrade all of your nova-compute nodes
>> one by one from Liberty to Mitaka. You will not need to live-migrate any
>> workloads unless you simultaneously want to upgrade either the operating
>> system or the libvirt/QEMU versions on the nova-computes.
>> Rinse and repeat to get to Newton.
>> There's many guides online for how to do upgrades of OpenStack. Please
>> follow one of them to perform a best practice N-1 to N upgrade.
>> Best,
>> -jay
>> _______________________________________________
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>> OpenStack-operators at lists.openstack.org
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> The nova docs on rolling upgrades were also recently updated:
> http://docs.openstack.org/developer/nova/upgrade.html#minimal-downtime-upgrade-process
> --
> Thanks,
> Matt Riedemann
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