Here is the output of libvirtd --verbose:
# libvirtd --verbose 09:07:56.713: error : ebiptablesDriverInit:3416 : internal error essential tools to support ip(6)tables firewalls could not be located 09:07:56.713: error : ebiptablesDriverInit:3425 : internal error firewall tools were not found or cannot be used 09:07:56.715: warning : qemudStartup:1832 : Unable to create cgroup for driver: No such device or address 09:07:56.991: warning : qemudParsePCIDeviceStrs:1422 : Unexpected exit status '1', qemu probably failed 09:07:57.052: warning : lxcStartup:1895 : Unable to create cgroup for driver: No such device or address
