[libvirt-users] configuring a lxc guest to run 32bits from a 64bits host under libvirt-lxc

[Thierry Parmentelat]

Hi again

Answering my own e-mail on a few points:

. first off, stupid me, http://libvirt.org/format.html indeed is empty and it seems to be by design, but the subtrees are not, like e.g.
http://libvirt.org/formatdomain.html

. from this page it seems like using something like
  <os>
    <type arch='i686'>exe</type>
    <init>/sbin/init</init>
  </os>
in the guest XML config should do the trick

I need to investigate this out a little further to see if it does what I am expecting or not

— Thierry

On 02 Jul 2014, at 00:16, Thierry Parmentelat <thierry.parmentelat at inria.fr> wrote:

> Hi there
> I have a couple of newbie questions concerning running a 32bits guest in a 64bits host using libvirt - lxc; I’m running libvirt-1.2.5 on fedora18 and fedora20
> 
> (a) is this supported at all, and 
> (b) if so how do I configure this for a given guest ?
> 
> guessing from the mere existence of http://www.redhat.com/archives/libvir-list/2011-February/msg01040.html
> I would think the answer to (a) is yes; anybody cares to confirm ?
> 
> As far as (b), I would expect some flag could be set in the XML description of my guest so that libvirt can perform the proper syscall to personality() at the right point in the process hierarchy..
> However I have not been able to spot this in the documentation so far, but OTOH the page on the XML configuration here
> http://libvirt.org/format.html
> appears to be empty so this might be a temporary hiccup ?
> 
> in any case, any hint or insight on this matter would be much appreciated — Thierry
> 
>