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Hi Andrea, comments inline...

On 08/10/2012 11:50 AM, Rosa, Andrea (HP Cloud Services) wrote:
> Hi
> 
> I know that the plan is try to replace the nova-manage command and move actions as API extensions.

Yes, AFAIK, that is definitely the direction.

> The API extension "host-update" is supposed to replace action for enabling/disabling services (nova-manage enable service...), is that correct?

I'm not sure that host-update is the same as enable/disable service. In
fact, I'm pretty sure it is not. The os-hosts API extension seems to be
(currently) a Xen-specific API extension that allows the Xen hypervisor
to take a *compute host* offline or put it in maintenance mode, which is
a Xen-specific thing AFAICT.

Meanwhile, service enable/disable seems to be more generic, referring to
any service daemon -- nova-scheduler, nova-compute, nova-volumes, etc.
For this type of thing, I believe it makes the most sense to marry the
work you have done with the work that Yun Mao and some IBMers are
working on for the generic service healthcheck system:

https://review.openstack.org/#/c/10903/

What are your thoughts?

Best,
-jay

> It seems to me that this extensions at this moment is just supported by the XEN plugin, as I have just worked on a blueprint to extend the nova-manage service functionality[1], I was wondering if that change makes sense or do I need to rewrite it as an API extension?
> 
> If I need to create a new API extension I'd like to make this feature available for libvirt driver.
> Regards
> --
> Andrea Rosa
> 
> [1]https://review.openstack.org/#/c/10877/
> 
> 
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