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

[Daniel P. Berrange]

On Sun, Jul 13, 2014 at 01:21:57PM +0200, Thierry Parmentelat wrote:
> Hi again
> 
> Sorry for the late reaction on this..
> 
> So everything seems to work fine for me when using the setting below, except maybe for one little point
> 
> I was kind of expecting that 
> # virsh -c lxc:/// lxc-enter-namespace my_32bits_vm ...
> would run in a 32bits environment too, but from what I can see it is not the case
> 
> I take it it can be argued, reading the documentation for lxc-enter-namespace again, that might well be the intended behaviour
> 
> In this case I would argue it would make a lot of sense to have either :
> (a) lxc-enter-namespace to do the right thing personality-wise as well (possibly through an option if there are legacy concerns)
> or (b) a virsh function/command that can help retrieve the right personality
> like e.g.
> virsh -c lxc:/// personality the_vm
> that would return either linux32 or linux64 so it would be possible to run
> $(virsh -c lxc:/// personality the_vm) virsh -c lxc:/// lxc-enter-namespace the_vm — /usr/bin/env yum groupinstall ...
> 
> Or is there something else available already that I am missing altogether ?

This is something I've never thought about. Since the binary being
executed is inside the root of the container though, it would make
sense to use the same personality as the container.

Regards,
Daniel
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