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Can you describe the deployment topology you envision -- which
service(s) are on what host(s)? Your question seems based on an
assumption that ironic is able to control the power state of the
nova-compute host _itself_ -- which is not true (*). When using the
nova.virt.ironic driver with Nova, you would run a very small number
of nova-compute services, and scale out the ironic-conductor services
to some degree. Ironic is not a service to manage the power state of
the nova-compute host -- it's a separate service to provision Nova
instances on bare metal servers (which are, generally, kept powered
off unless in use).

(*) unless you're using TripleO, in which case your question seems to
be mixing the undercloud (ironic) with the overcloud (nova-compute +
libvirt/xen/etc), without explicitly explaining how or why you're
doing that.

-D

On Tue, May 6, 2014 at 1:36 PM, François Rossigneux
<francois.rossigneux at inria.fr> wrote:
> Devananda,
>
> I get the Nova Hypervisor ID by typing "nova hypervisor-list".
> I am developing a resource reservation service and the reservations are
> attached to a Nova Hypervisor ID.
> I would use Ironic to put the nodes on standby mode when there is no running
> instances.
> This is why I need to get the Ironic node UUID from a Nova Hypervisor ID...
>
> "http://ironic:6385/v1/nodes?instance_uuid=blablabla" is not a perfect
> solution : without running instances, you cannot retrieve the node UUID...
>
> Thanks.
>
>
> Le 06/05/2014 22:05, Devananda van der Veen a écrit :
>
>> François,
>>
>> Can you clarify by way of a CLI example what exactly you mean by "nova
>> hypervisor id"? I'm not sure if you mean the instance uuid, compute
>> host id, service id, or something else.
>>
>> I'll assume you mean the nova instance uuid, in which case, you can
>> get the Ironic node uuid from "nova show $instance" -- it is in the
>> hypervisor_hostname field.
>>
>> -D
>>
>> On Tue, May 6, 2014 at 2:23 AM, François Rossigneux
>> <francois.rossigneux at inria.fr> wrote:
>>>
>>> Hi all,
>>> I need to retrieve the Ironic node uuid from a Nova Hypervisor ID. How
>>> can I
>>> do that?
>>> Thanks.
>>>
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>>
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>
>
> --
> François Rossigneux
> Ingénieur Inria Projet XLcloud
> http://perso.ens-lyon.fr/francois.rossigneux
>
>
>
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