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

Joe Topjian joe at topjian.net
Thu Feb 13 18:51:26 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.

The Ops Guide has a chapter on maintenance and failures:


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:


Hope that helps,

On Thu, Feb 13, 2014 at 1:20 PM, Robert van Leeuwen <
Robert.vanLeeuwen at spilgames.com> wrote:

> > Is there an easy way to get a list of all instances on a specific host?
> Never mind, found it:
> nova hypervisor-servers $hostname.
> Still curious what other people use for putting machines in maintenance
> though :)
> Cheers,
> Robert van Leeuwen
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> OpenStack-operators at lists.openstack.org
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