Comment 4 for bug 1436999

I believe that what needs to be done here is enable the udev_sync option in lvm.conf files and test that various operations that interact with udev (running 'reboot' and 'udevadm trigger' inside containers) as well as LVM Cinder operations (create volume, attach to instance, detach from instance, delete volume) don't cause any adverse reactions on the host. I don't believe there's any way changing this option would cause any issues, and I don't believe it would change the behavior of udev-affecting commands whether enabled or disabled, but it's worth testing.

According to what I can find from various bits and pieces of commentary on udev/LXC and Ubuntu specifically, the upstart/systemd LXC Apparmor profiles should prevent udev event propagation to the host, so anything LVM does via udev should, in theory, be safe and isolated.