[Openstack-operators] Putting a hypervisor into maintenance / how to get a list of all instance IDs on a host

Robert van Leeuwen Robert.vanLeeuwen at spilgames.com
Fri Feb 14 07:47:22 UTC 2014

> nova-manage (and I believe somewhere in the nova command as well?) can disable a service. This will
> prevent new instances from spawning but still allow them to be migrated to another host.
Yes this is what I use in my script.

> And there's also the "nova evacuate" command, but I've never used it, so I'm not entirely sure how it works
> or when to use it:
>From what I have read from the docs this is used when you have a failed hypervisor and want to spawn the instances somewhere else.

I was just wandering what people do when they want to put a node into maintenance.
We want to live-migrate everything to another host and I was wondering if people already build scripts for this.

Robert van Leeuwen

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