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Seems like this would be much more useful as part of the quotas extension.  This feature is small enough for a bug I think.

Vish

On Mar 22, 2012, at 6:36 AM, Eoghan Glynn wrote:

> 
> Folks,
> 
> One thing that's been on my wishlist since hitting a bunch of
> quota exceeded issues when first running Tempest and also on
> the Fedora17 openstack test day.
> 
> It's ability to easily see the remaining headroom for each
> per-project quota, e.g.
> 
> $ nova-manage quota --headroom --project=admin
> ...
> instances:    10  (of which 1 remaining)
> floating_ips: 10  (of which 8 remaining)
> ...
> 
> This would give an immediate indication of an impending resource
> starvation issue - "shoot, I'll have to clean out some of those
> old instances before spinning up two more, else increase the quota".
> 
> It would only really be useful for quotas that represent a
> threshold on overall resource usage that may grow or shrink over
> time, as opposed to some fixed limit (think, max instances versus
> max injected files per instance).
> 
> So the question is whether there's already a means to acheive this
> in one fell swoop? 
> 
> And if not, would it be best tracked with a small-scale nova blueprint,
> or as an enhancement request expressed in a launchpad bug?
> 
> Cheers,
> Eoghan
> 
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