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

[Anjali Kulkarni]

There is a reason for it, but I can’t discuss that. There is enough
reason, and I know you would need some funky stuff (access stuff on host)
to get it working, but that’s what I was looking at to see if it is
feasible or if anyone has done it.

Anjali

On 2/20/15, 5:37 AM, "Fajar A. Nugraha" <list at fajar.net> wrote:

>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
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