Open Stack

Hi Matt,

you are right. That's at least what I understand under 'live-evacuate'. The
compute is still working, all VMs on it are running.
Our VMs can all be live-migrated. We wrote a script to live-migrate all VMs
to other computes, to do hardware maintenance on the evacuated
compute server.

I know, this is not going to work for every setup, but could be starting
point, for what Gilles described.



Matt Riedemann <mriedemos at gmail.com> schrieb am Mo., 30. Juli 2018 um
20:20 Uhr:

> On 7/27/2018 3:34 AM, Gilles Mocellin wrote:
> > - for compute nodes : disable compute node and live-evacuate instances...
>
> To be clear, what do you mean exactly by "live-evacuate"? I assume you
> mean live migration of all instances off each (disabled) compute node
> *before* you upgrade it. I wanted to ask because "evacuate" as a server
> operation is something else entirely (it's rebuild on another host which
> is definitely disruptive to the workload on that server).
>
>
> http://www.danplanet.com/blog/2016/03/03/evacuate-in-nova-one-command-to-confuse-us-all/
>
> --
>
> Thanks,
>
> Matt
>
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