[lxc-users] Libvirt inside lxc 1.0

[Ivan Borodin]

Greetings, gentlemen.
I'm trying to launch libvirtd in an lxc-container and have certain
problems. Looks like, it's my lack of knowledge about linux in general.

Host system is lmde2 with sysv-init(kernel 3.16.0-4-amd64, lxc 1.0.6-6).
Guest is Debian Sid in a privileged container.

As for now, I see, that libvirt requires at least /dev/mem to be
accessible, so I need /dev/mem pass-through.

lxc.container.conf(5) doesn't offer any detail about /dev configuration
beyond lxc.autodev. I had no luck searching in the web, except some
evidence, that launching bare kvm inside lxc is possible and /dev/mem
pass-through is possible too.

The common thing is lxc devices.list containing  'a *:* rwm'.
With various config combinations of lxc.autodev=0/1, container's
cgroup's devices.list allowing all or a limited set of devices, trying
to bind-mount host's /dev to rootfs on the host level or via
lxc.mount.entry and other stuff, I get exactly two results: tiny,
minimalistic, on-it's-own /dev in guest's console, or lxc-ls reporting
guest as running and guest itself hanging with accessible console and no
login prompt in it.

This can sum into that I either don't get access to host's dev, with
minimal dev populated or not, or I do, but, in this case there are some
problems, access conflicts between host and guest, maybe, which I can't
imagine.

I clearly don't get something about lxc and /dev. Could you, please,
point that out.

Best regards,
Ivan.