[lxc-users] Booting a Freebsd VM inside a container

[Fajar A. Nugraha]

On Fri, Feb 20, 2015 at 8:16 PM, Anjali Kulkarni <anjali at juniper.net> wrote:
> Thanks, so for networking to work, all you need to do is add the
> networking links to the config file in /var/lib/lxc/<lxc_name> and then
> networking should work in the VM as it would in a normal LXC.

Not if by "VM" you mean a qemu instance.

> Regarding the freebsd VM, I understand that the host OS has to be the same
> as a container OS, but what I am looking for is a way to run the freebsd
> VM in emulated mode via qemu. Theoretically, if I can run a freebsd VM on
> the host OS via qemu/kvm, I should be able to run it inside the container
> via qemu as well right?

No.

Containers on lxc are not designed to run qemu (or virtualbox, or
name-your-fancy-software-that-access-devices directly) in it. In fact,
the default config on ubuntu would prevent that (via cap.drop and
selinux) to keep the containers from harming the host.

You could PROBABLY work around it by creating an unsafe container
(e.g. using "lxc.cap.drop=" and "lxc.aa_profile=unconfined"), but then
what's the point of using containers then?

> I don¹t want to map the VM¹s OS to the underlying
> OS, but just use qemu for the emulation part. Does that make sense?

Not really. Is there any particular use case why you want to run
qemu/kvm instead the container, instead of on the host? Just because
it's cool? Because you rent a container from a VPS and want to run
something else on it?

-- 
Fajar