magg@cloudHQ1:~$ sudo tail -f /var/log/nova/nova-compute.log
(nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 306, in list_instances
(nova): TRACE:     for x in self._conn.listDomainsID()]
(nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 259, in _get_connection
(nova): TRACE:     self.read_only)
(nova): TRACE:   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 293, in _connect
(nova): TRACE:     return libvirt.openAuth(uri, auth, 0)
(nova): TRACE:   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 102, in openAuth
(nova): TRACE:     if ret is None:raise libvirtError('virConnectOpenAuth() failed')
(nova): TRACE: libvirtError: unable to connect to '/var/run/libvirt/libvirt-sock', libvirtd may need to be started: No such file or directory
(nova): TRACE: