[Openstack-operators] Safe migrations Liberty to Newton

Matt Riedemann mriedem at linux.vnet.ibm.com
Sat Nov 12 01:13:34 UTC 2016

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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The nova docs on rolling upgrades were also recently updated:




Matt Riedemann

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