http://bazaar.launchpad.net/~charm-helpers/charm-helpers/devel/view/head:/charmhelpers/contrib/openstack/amulet/utils.py#L1239
http:// bazaar. launchpad. net/~charm- helpers/ charm-helpers/ devel/view/ head:/charmhelp ers/contrib/ openstack/ amulet/ utils.py# L1239