ConfigFileValueError: Value for option host is not valid: localhost is not IPv4 or IPv6 address

[Paul Greenberg]

The /etc/bagpipe-bgp/bgp.conf.template contains the following lines:

```
[API]
# BGP component API IP address and port
host=localhost
port=8082
```

Unless changing `localhost` to `0.0.0.0`, the following error is being thrown:

```
# bagpipe-bgp -v
Option "verbose" from group "DEFAULT" is deprecated for removal. Its value may be silently ignored in the future.
2017-03-17 22:25:49.066 14818 INFO networking_bagpipe.bagpipe_bgp.bgp_daemon [-] Starting bagpipe-bgp...
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon [-] Error while starting BGP daemon: Value for option host is not valid: localhost is not IPv4 or IPv6 address
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon Traceback (most recent call last):
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/networking_bagpipe/bagpipe_bgp/bgp_daemon.py", line 92, in daemon_main
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon pecan_api = api.PecanAPI()
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/networking_bagpipe/bagpipe_bgp/api/api.py", line 70, in __init__
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon app = setup_app()
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/networking_bagpipe/bagpipe_bgp/api/api.py", line 43, in setup_app
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon 'host': cfg.CONF.API.host,
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 3257, in __getattr__
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon return self._conf._get(name, self._group)
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2821, in _get
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon value = self._do_get(name, group, namespace)
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon File "/usr/lib/python2.7/site-packages/oslo_config/cfg.py", line 2864, in _do_get
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon % (opt.name, str(ve)))
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon ConfigFileValueError: Value for option host is not valid: localhost is not IPv4 or IPv6 address
2017-03-17 22:25:49.067 14818 ERROR networking_bagpipe.bagpipe_bgp.bgp_daemon
```

[Thomas Morin (tmmorin-orange)]

Sorry, for totally failing to follow up here on this bug.

This has been fixed some time ago, in https://review.openstack.org/#/c/460494/ .

It is now supported to providing either a hostname or an IP address for this parameter.