Re: [Engine-devel] Is there a 'Can run this VM?' query
----- Original Message -----
From: "Roy Golan" <rgolan(a)redhat.com>
To: "Omer Frenkel" <ofrenkel(a)redhat.com>
Cc: engine-devel(a)ovirt.org, "Yaniv Kaul" <ykaul(a)redhat.com>
Sent: Monday, January 9, 2012 2:21:29 PM
Subject: Re: [Engine-devel] Is there a 'Can run this VM?' query
----- Original Message -----
> From: "Omer Frenkel" <ofrenkel(a)redhat.com>
> To: "Yaniv Kaul" <ykaul(a)redhat.com>
> Cc: engine-devel(a)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(a)redhat.com>
> > To: engine-devel(a)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.
yep, RunVmCommand.CanRunVm() is public and static,
return boolean and even fill list messages.
this is why i said i think its easy to do it :)
just need to check it really covers anything and behave well
> 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(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/engine-devel
> >
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