liberty - pkg_resources.VersionConflict: (six 1.5.2 (/usr/lib/python2.7/dist-packages), Requirement.parse('six>=1.9.0'))

# swift-proxy unit traceback:

2015-10-05 11:15:06 INFO install Traceback (most recent call last):
2015-10-05 11:15:06 INFO install File "/var/lib/juju/agents/unit-swift-proxy-0/charm/hooks/install.real", line 525, in <module>
2015-10-05 11:15:06 INFO install main()
2015-10-05 11:15:06 INFO install File "/var/lib/juju/agents/unit-swift-proxy-0/charm/hooks/install.real", line 519, in main
2015-10-05 11:15:06 INFO install hooks.execute(sys.argv)
2015-10-05 11:15:06 INFO install File "/var/lib/juju/agents/unit-swift-proxy-0/charm/hooks/charmhelpers/core/hookenv.py", line 704, in execute
2015-10-05 11:15:06 INFO install self._hooks[hook_name]()
2015-10-05 11:15:06 INFO install File "/var/lib/juju/agents/unit-swift-proxy-0/charm/hooks/install.real", line 118, in install
2015-10-05 11:15:06 INFO install config('min-hours'))
2015-10-05 11:15:06 INFO install File "/var/lib/juju/agents/unit-swift-proxy-0/charm/hooks/lib/swift_utils.py", line 400, in initialize_ring
2015-10-05 11:15:06 INFO install from swift.common.ring import RingBuilder
2015-10-05 11:15:06 INFO install File "/usr/lib/python2.7/dist-packages/swift/__init__.py", line 27, in <module>
2015-10-05 11:15:06 INFO install pkg_resources.Requirement.parse('swift')).version
2015-10-05 11:15:06 INFO install File "/usr/share/python-wheels/setuptools-3.3-py2.py3-none-any.whl/pkg_resources.py", line 223, in get_provider
2015-10-05 11:15:06 INFO install return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
2015-10-05 11:15:06 INFO install File "/usr/share/python-wheels/setuptools-3.3-py2.py3-none-any.whl/pkg_resources.py", line 725, in require
2015-10-05 11:15:06 INFO install needed = self.resolve(parse_requirements(requirements))
2015-10-05 11:15:06 INFO install File "/usr/share/python-wheels/setuptools-3.3-py2.py3-none-any.whl/pkg_resources.py", line 632, in resolve
2015-10-05 11:15:06 INFO install raise VersionConflict(dist,req) # XXX put more info here
2015-10-05 11:15:06 INFO install pkg_resources.VersionConflict: (six 1.5.2 (/usr/lib/python2.7/dist-packages), Requirement.parse('six>=1.9.0'))

# juju-deployer fails with
2015-10-05 11:15:08 [DEBUG] deployer.env: Delta unit: swift-proxy/0 change:error
2015-10-05 11:15:08 [DEBUG] deployer.env: Delta unit: nova-compute/2 change:started
2015-10-05 11:15:08 [ERROR] deployer.env: The following units had errors:
   unit: swift-proxy/0: machine: 19 agent-state: error details: hook failed: "install"
2015-10-05 11:15:08 [INFO] deployer.cli: Deployment stopped. run time: 613.49

# juju stat after trace

http://paste.ubuntu.com/12689643/

I'm a bit stumped on this. I've tried installing all related packages from the cloud archive (python-netifaces, python-netaddr, python-six, python-setuptools, and more) in the install hook. Interestingly when doing this I've had success manually running the install hook, but haven't had any success on a regular deployment.

apt_upgrade() prior to the apt_install() calls in the install hook doesn't help either. I have to guess this is a packaging issue.

And interestingly juju add-unit is successful.

This appears to be fixed by the following swift-proxy charm commit:

118. By Liam Young 9 hours ago
[james-page, r=gnuoy] Add support for 2.5.0 of swift

Deal with six version change by moving init of rings into config changed, with appropriate check to ensure that rings don't already exist.

Merged branch lp:~james-page/charms/trusty/swift-proxy/2.5.0