listening on ipv6 fails

[Harm Weites]

When specifying an ipv6 api_host in the [service:api] section (like ::1) I see the following in my logs:

2014-11-19 20:09:32.759 15401 ERROR designate.openstack.common.threadgroup [-] (-3, 'Lookup timed out')
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup Traceback (most recent call last):
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/designate/openstack/common/threadgroup.py", line 125, in wait
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup x.wait()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/designate/openstack/common/threadgroup.py", line 47, in wait
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup return self.thread.wait()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 173, in wait
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup return self._exit_event.wait()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/event.py", line 121, in wait
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup return hubs.get_hub().switch()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 293, in switch
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup return self.greenlet.switch()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 212, in main
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup result = function(*args, **kwargs)
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/designate/openstack/common/service.py", line 490, in run_service
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup service.start()
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/designate/openstack/deprecated/wsgi.py", line 132, in start
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup self._socket = self._get_socket(self._host, self._port, self._backlog)
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/designate/openstack/deprecated/wsgi.py", line 91, in _get_socket
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup socket.SOCK_STREAM)[0]
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py", line 184, in getaddrinfo
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup rrset = resolve(host)
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py", line 140, in resolve
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup raise socket.gaierror(error)
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup gaierror: (-3, 'Lookup timed out')
2014-11-19 20:09:32.759 15401 TRACE designate.openstack.common.threadgroup

While this looks like a perfectly fine issue in greendns.py (see [1]), is it possible to change to something else? Other Openstack projects listen perfectly fine for IPv6.

I'm asuming this affects the others services as well, though I only verified/tested with api.

[1] https://github.com/eventlet/eventlet/blob/master/eventlet/support/greendns.py#L220

[Harm Weites (harmw)]

I noticed Glance fixed the same issue a while back: https://bugs.launchpad.net/glance/+bug/1331885

[Pradeep Kumar Singh (pradeep-singh-u)]

Hi Kiall,

I have tested this bug and it seems it is fixed by two things:
1) by having eventlet version >0.17.0
     https://github.com/eventlet/eventlet/commit/a6ce444265d36fb23361809d40da73caf4864487
2) if we don't upgrade eventlet version and keep it to 0.16.1, then your patch fixes this too,
     https://review.openstack.org/#/c/191496/

Can we close this issue?

[Kiall Mac Innes (kiall)]

Yes, thanks pradeep for validating this one!