[Engine-devel] Is there a 'Can run this VM?' query

[Roy Golan]

----- Original Message -----
> From: "Omer Frenkel" <ofrenkel at redhat.com>
> To: "Yaniv Kaul" <ykaul at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Monday, January 9, 2012 2:06:58 PM
> Subject: Re: [Engine-devel] Is there a 'Can run this VM?' query
> 
> 
> 
> ----- Original Message -----
> > From: "Yaniv Kaul" <ykaul at redhat.com>
> > To: engine-devel at ovirt.org
> > Sent: Monday, January 9, 2012 9:36:34 AM
> > Subject: [Engine-devel] Is there a 'Can run this VM?' query
> > 
> > Beaker automated test system
> > (http://fedoraproject.org/wiki/QA/Beaker)
> > would like to integrate with the project, via the REST API.
> > Their main concern is that they'll provision VMs who would not be
> > able
> > to run on the ovirt setup.
> > I think there are two cases here:
> > 1. Provisioning a VM with X vCPUs, while there isn't a host
> > available
> > with such number of pCPUs (or similar in memory) - this is easier,
> > as
> > it
> > can be 'calculated' from the setup beforehand and we can avoid such
> > provisioning.
> > 2. More difficult - in runtime, the hosts are over-committed and we
> > cannot run a VM - can we, before trying to run a VM, ask if it's
> > feasible? I know it's a point in time, and may be wrong in the next
> > second, but if we go 'no' as an answer, it already provides good
> > information to Beaker to continue and look elsewhere.
> > Y.
> >
> 
> there is no such query currently,
if we're going to supply one, we either encapsulate the canDoAction to a class and re-use or
supply a boolean argument on the parameter class, say "dryRun", to indicate command doesn't
perform the execute part realy.
> the answer to this question actually is lots of other questions
> (status, storage, host availability and more)
> BUT i think its rather easy creating such a query (though caller need
> to remember it might be a long one)
>  
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> > Engine-devel at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > 
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