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