Comment 2 for bug 1649341

[stack@instack ~]$ sudo grep transport_url /etc/nova/nova.conf
transport_url=rabbit://55f7b1c2b4ee0e8a4f8311de334c6b71d13c1b45:1cf85a15b3fb0d86ec3bda2dedd3b8952ad6d72a@192.0.2.1//

[stack@instack ~]$ sudo nova-manage cell_v2 simple_cell_setup --transport-url "rabbit://55f7b1c2b4ee0e8a4f8311de334c6b71d13c1b45:1cf85a15b3fb0d86ec3bda2dedd3b8952ad6d72a@192.0.2.1//"
Traceback (most recent call last):
  File "/bin/nova-manage", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 1561, in main
    config.parse_args(sys.argv)
  File "/usr/lib/python2.7/site-packages/nova/config.py", line 50, in parse_args
    rpc.init(CONF)
  File "/usr/lib/python2.7/site-packages/nova/rpc.py", line 74, in init
    TRANSPORT = create_transport(get_transport_url())
  File "/usr/lib/python2.7/site-packages/nova/rpc.py", line 154, in get_transport_url
    return messaging.TransportURL.parse(CONF, url_str, TRANSPORT_ALIASES)
  File "/usr/lib/python2.7/site-packages/oslo_messaging/transport.py", line 398, in parse
    url = url or conf.transport_url
  File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2320, in __getattr__
    raise NoSuchOptError(name)
oslo_config.cfg.NoSuchOptError: no such option transport_url in group [DEFAULT]

It may be this is partly a nova and partly a puppet-nova bug? As it seems the nova releasenotes and api_db sync help text is wrong, and it seems like puppet-nova isn't driving the cells_v2 simple_cell_setup at the appropriate time with the URL it expects (which isn't all that clear as evidently it doesn't match the nova.conf setting with the same name).