# Pastebin pPfMlade
2017-02-21 18:47:22 INFO juju-log Adding port ens4 to bridge br-ex
2017-02-21 18:47:22 INFO config-changed Cannot find device "ens4"
2017-02-21 18:47:22 INFO config-changed Traceback (most recent call last):
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/config-changed", line 359, in <module>
2017-02-21 18:47:22 INFO config-changed     hooks.execute(sys.argv)
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/core/hookenv.py", line 715, in execute
2017-02-21 18:47:22 INFO config-changed     self._hooks[hook_name]()
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/contrib/openstack/utils.py", line 1829, in wrapped_f
2017-02-21 18:47:22 INFO config-changed     restart_functions)
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/core/host.py", line 524, in restart_on_change_helper
2017-02-21 18:47:22 INFO config-changed     r = lambda_f()
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/contrib/openstack/utils.py", line 1828, in <lambda>
2017-02-21 18:47:22 INFO config-changed     (lambda: f(*args, **kwargs)), restart_map, stopstart,
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/contrib/hardening/harden.py", line 79, in _harden_inner2
2017-02-21 18:47:22 INFO config-changed     return f(*args, **kwargs)
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/config-changed", line 145, in config_changed
2017-02-21 18:47:22 INFO config-changed     configure_ovs()
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/neutron_utils.py", line 855, in configure_ovs
2017-02-21 18:47:22 INFO config-changed     add_bridge_port(br, port, promisc=True)
2017-02-21 18:47:22 INFO config-changed   File "/var/lib/juju/agents/unit-neutron-gateway-0/charm/hooks/charmhelpers/contrib/network/ovs/__init__.py", line 47, in add_bridge_port
2017-02-21 18:47:22 INFO config-changed     subprocess.check_call(["ip", "link", "set", port, "up"])
2017-02-21 18:47:22 INFO config-changed   File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
2017-02-21 18:47:22 INFO config-changed     raise CalledProcessError(retcode, cmd)
2017-02-21 18:47:22 INFO config-changed subprocess.CalledProcessError: Command '['ip', 'link', 'set', u'ens4', 'up']' returned non-zero exit status 1