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The stock CentOS RPMs:
Sep 11 06:42:15 Installed: libvirt-0.10.2-18.el6_4.9.x86_64
don't create a /dev/tty inside the LXC container. This breaks SSH (host key prompts), sudo (password prompt) and doubtless more things too.
To fix roll something more current from Fedora:
Sep 25 11:29:23 Updated: libvirt-1.1.2-3.local.x86_64
Seems the project first thought /dev/tty was a risky proposition (!), but changed their mind.
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