The python-dnspython package is only used in Swift for the cname_lookup middleware. If you are not using that middleware, you can safely not use python-dnspython.
--john > On Jun 30, 2015, at 9:54 PM, Mark Kirkwood <mark.kirkw...@catalyst.net.nz> > wrote: > > On 01/07/15 13:10, Mark Kirkwood wrote: >> I ran into this a few days ago. The context is we are running a node >> that performs several api functions and it is going to be a swift proxy >> too (at a later date when usage ramps up many of these functions may >> move to individual machines, but for now we'd like to keep them together). >> >> The machines are running Ubuntu Trusty, and we are installing Icehouse >> packages. >> >> So currently the cinder api service runs and listens on a wide ipv6 >> range (::). After I install the python-swift package the cinder api >> refuses to start with: >> >> 2015-07-01 00:50:25.327 12159 CRITICAL cinder [-] gaierror: [Errno -9] >> Address family for hostname not supported >> 2015-07-01 00:50:25.327 12159 TRACE cinder Traceback (most recent call >> last): >> 2015-07-01 00:50:25.327 12159 TRACE cinder File "/usr/bin/cinder-api", >> line 57, in <module> >> 2015-07-01 00:50:25.327 12159 TRACE cinder server = >> service.WSGIService('osapi_volume') >> 2015-07-01 00:50:25.327 12159 TRACE cinder File >> "/usr/lib/python2.7/dist-packages/cinder/service.py", line 301, in __init__ >> 2015-07-01 00:50:25.327 12159 TRACE cinder port=self.port) >> 2015-07-01 00:50:25.327 12159 TRACE cinder File >> "/usr/lib/python2.7/dist-packages/cinder/wsgi.py", line 118, in __init__ >> 2015-07-01 00:50:25.327 12159 TRACE cinder backlog=backlog) >> 2015-07-01 00:50:25.327 12159 TRACE cinder File >> "/usr/lib/python2.7/dist-packages/cinder/wsgi.py", line 174, in _get_socket >> 2015-07-01 00:50:25.327 12159 TRACE cinder family=family) >> 2015-07-01 00:50:25.327 12159 TRACE cinder File >> "/usr/lib/python2.7/dist-packages/eventlet/convenience.py", line 38, in >> listen >> 2015-07-01 00:50:25.327 12159 TRACE cinder sock.bind(addr) >> 2015-07-01 00:50:25.327 12159 TRACE cinder File >> "/usr/lib/python2.7/socket.py", line 224, in meth >> 2015-07-01 00:50:25.327 12159 TRACE cinder return >> getattr(self._sock,name)(*args) >> 2015-07-01 00:50:25.327 12159 TRACE cinder gaierror: [Errno -9] Address >> family for hostname not supported >> >> The culprit appears to be the python-dnspython package that is a dep for >> python-swift. >> >> Now it appears that there is some monkey patching going on in the >> various wsgi eventlet modules to do ipv6 - somehow python-dnspython is >> changing the way that works - any thoughts welcome, as it would be cool >> to have things working again! >> > > After reading up a bit on this whole monkey patching thing, I see that adding: > > EVENTLET_NO_GREENDNS=yes > > to the cinder user's env seems to get it working again. However this will > mean that there is *no* patching...which might not be the best answer (still > hoping for better suggestions). > > Regards > > Mark > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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