https://bugzilla.redhat.com/show_bug.cgi?id=1033604
--- Comment #12 from Daniel Walsh dwalsh@redhat.com --- Since /dev is already established by docker, we do not want systemd to attempt to mount /dev. I believe this is the same way this worked in virt-sandbox. One difference is that docker does not remove cap_mknod, but blocks the creation of devices nodes based on cgroup config.
Is this what is causing the problem?