Is it possible to use LXC under heavier virtualization (Xen DomU,KVM,Hyper-V,VMVare) ? I would like to use it as security (isolation) tool, the ability to limit resource consumption is not priority for me. I am only interesting if it can be done straightforward way (same/similar to using LXC on non-virtualized server), I do not want to use too tricky setup on production server.
Here's an Ubuntu page that shows that you can run in under KVM - https://help.ubuntu.com/community/LXC
I've just completed live implementation of LXC under VMware VSphere, as part of it I did a couple of Proof of Concepts that implemented LXC under KVM and VirtualBox as well here's the link:
I can't talk for Xen or KVM but neither Hyper-V not ESX/i directly support LXC but of course they all support various linuxes and certainly ESX/i allows a hypervisor-within-hypervisor so it might work like that.