Sample Vagrant config to get Docker running on CentOS (6.4, in this case).
Proper packaging is not being used, but this is at least a starting point that could be useful for other people. There's no guarantee everything works, and there is a warning when containers start:
lxc-start: Does this kernel version support 'attach'?
lxc-start: Function not implemented - failed to set namespace 'mnt'
and sometimes
lxc-start: Function not implemented - failed to set namespace 'pid'
But it's able to create containers from the centos and base images.