2015-08-19 17:20:37.946 18089 INFO nova.openstack.common.periodic_task [-] Skipping periodic task _periodic_update_dns because its interval is negative
2015-08-19 17:20:37.961 18089 INFO nova.virt.driver [-] Loading compute driver 'nova.virt.libvirt.LibvirtDriver'
2015-08-19 17:20:37.975 18089 ERROR nova.virt.driver [-] Unable to load the virtualization driver
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver Traceback (most recent call last):
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/nova/virt/driver.py", line 1391, in load_compute_driver
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     virtapi)
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/oslo/utils/importutils.py", line 52, in import_object_ns
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     return import_class(import_str)(*args, **kwargs)
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/oslo/utils/importutils.py", line 27, in import_class
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     __import__(mod_str)
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/__init__.py", line 15, in <module>
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     from nova.virt.libvirt import driver
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 99, in <module>
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     from nova.virt.libvirt import host
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/host.py", line 39, in <module>
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver     from eventlet import util as eventlet_util
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver ImportError: cannot import name util
2015-08-19 17:20:37.975 18089 TRACE nova.virt.driver