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From Julien Garet <julien.ga...@inria.fr>
Subject Re: Cloudstack + kvm : set arch = i686
Date Wed, 28 Nov 2012 08:34:53 GMT
Ok, done : https://issues.apache.org/jira/browse/CLOUDSTACK-554 

------ 
Attention, changement d'adresse et de numéro de téléphone ! 
Julien GARET 
DSI / SESI 
Bureau B201 
Inria Lille-Nord Europe 
Bâtiment B, 6 rue Heloise 
59650 Villeneuve d'Ascq 
téléphone: 03.59.35.86.86 
portable: 06.79.88.10.47 
----- Mail original -----

> De: "Edison Su" <Edison.su@citrix.com>
> À: cloudstack-users@incubator.apache.org
> Envoyé: Mardi 27 Novembre 2012 22:06:44
> Objet: RE: Cloudstack + kvm : set arch = i686

> > -----Original Message-----
> > From: Julien Garet [mailto:julien.garet@inria.fr]
> > Sent: Tuesday, November 27, 2012 11:02 AM
> > To: cloudstack-users@incubator.apache.org
> > Cc: cloudstack-users@incubator.apache.org
> > Subject: Re: Cloudstack + kvm : set arch = i686
> >
> >
> > Le 27 nov. 2012 à 17:51, David Nalley <david@gnsa.us> a écrit :
> >
> > > On Tue, Nov 27, 2012 at 11:40 AM, Julien Garet
> > > <julien.garet@inria.fr>
> > wrote:
> > >> Hello,
> > >>
> > >>
> > >> We have discovered something today we didn't expect... We are
> > >> using CS
> > 3.0.2 with KVM hypervisors. Our users want to be able to use 32 or
> > 64 bits
> > VMs, so, we have set up templates using 32 or 64 bits OSes (setting
> > OS type
> > 32 or 64 bits accordingly), but that does not have any impact on
> > the VM
> > deployed... arch option in the domain xml file is x86_64, whatever
> > we choose
> > as OS Type.
> > >>
> > >>
> > >> Is there a way to deploy 32bits VMs on 64bits hypervisors ?
> > >>
> > >>
> > >
> > > The arch of the operating system is different than the arch of
> > > the
> > > virtualized CPU (which is what I think you are referring to).
> > > What benefit do you expect to extract from having a virtualized
> > > 32bit
> > > CPU compared to a virtualized 64bit cpu? Do users that have
> > > physical
> > > machines in your environment note that you deployed a 32bit OS on
> > > a
> > > 64bit CPU?
> >
> > Our users are doing continous integration on the instances and they
> > have
> > noticed it wasn't a virtualized 32bits cpu ;-) It's a pain to work
> > for researchers
> > in computer science ! :-D
> >
> > The idea behind is KVM permits 32bit virtualization on 64bits
> > hardware, and
> > it's quite frustrating to just hide the truth (32bits OS on 64bits
> > hardware).
> >
> > Do we have a way to set kvm options on the guests or have
> > Cloudstack force
> > 32bits virtualization on 32bits templates ?

> Can you fire a bug about it? If the template is 32bit, need to set
> the cpu as 32bit.

> >
> > >
> > > --David

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