2016-06-13 13:40:36 +0000 /Stage[main]/Ceilometer/User[ceilometer]/groups (err): change from adm,nova,libvirtd to adm,libvirt,libvirtd,nova failed: Could not set groups on user[ceilometer]: Execu
tion of '/usr/sbin/usermod -G adm,libvirt,libvirtd,nova ceilometer' returned 6: usermod: group 'libvirt' does not exist
2016-06-13 13:40:36 +0000 /Stage[ main]/Ceilomete r/User[ ceilometer] /groups (err): change from adm,nova,libvirtd to adm,libvirt, libvirtd, nova failed: Could not set groups on user[ceilometer]: Execu libvirtd, nova ceilometer' returned 6: usermod: group 'libvirt' does not exist
tion of '/usr/sbin/usermod -G adm,libvirt,