MAAS will not import new images if it cannot connect to a cluster controller

MAAS version 1.7.0+bzr3299-0ubuntu1~trusty

Related to bug: https://bugs.launchpad.net/maas/+bug/1394339

After failing to remove the cluster controller from the MAAS webUI, I ran the following to attempt to start over:

sudo apt-get remove --purge maas-cli maas-cluster-controller maas-common maas-dhcp maas-dns maas-region-controller maas-region-controller-min python-django-maas python-maas-client python-maas-provisioningserver curtin-common maas python-curtin python-psycopg2 python-txtftp postgres* ; sudo apt-get autoremove ; sudo apt-get clean

When given the choice I picked remove/purge/drop all configs and databases.

I also ran the following to continue the cleanup process:

sudo rm /etc/dbconfig-common/maas-region-controller.conf /var/tmp/maas* /usr/share/maas/ /etc/maas /var/lib/maas /var/log/upstart/maas* /var/lib/ucf/cache/*maas*

and rebooted.

Now starting from scratch, I should be able to install maas, configure, login, configure and start importing images.

The following traceback from /var/log/maas/maas-django.log shows the machine still trying to connect to 10.1.10.11 which is the 2nd cluster controller I had originally setup, connected, imported images to and in the end shut down and attempted to remove.

INFO 2014-11-21 14:03:14,942 twisted RegionServer connection established (HOST:IPv4Address(TCP, '10.245.128.2', 48181) PEER:IPv4Address(TCP, '10.1.10.11', 51630))
INFO 2014-11-21 14:03:14,946 twisted RegionServer connection established (HOST:IPv4Address(TCP, '10.245.128.2', 51702) PEER:IPv4Address(TCP, '10.1.10.11', 35831))
INFO 2014-11-21 14:03:14,960 twisted Cluster '3ff52dfe-454b-4a91-bef5-5cc3bb111460' FAILED authentication; dropping connection.
INFO 2014-11-21 14:03:14,960 twisted RegionServer connection lost (HOST:IPv4Address(TCP, '10.245.128.2', 48181) PEER:IPv4Address(TCP, '10.1.10.11', 51630))
INFO 2014-11-21 14:03:14,964 twisted RegionServer connection lost (HOST:IPv4Address(TCP, '10.245.128.2', 51702) PEER:IPv4Address(TCP, '10.1.10.11', 35831))
ERROR 2014-11-21 14:03:14,965 twisted Cluster '3ff52dfe-454b-4a91-bef5-5cc3bb111460' could not be authenticated; dropping connection.
Traceback (most recent call last):
Failure: twisted.internet.error.ConnectionDone: Connection was closed cleanly.

ERROR 2014-11-21 14:03:14,965 twisted Unhandled error in Deferred:
ERROR 2014-11-21 14:03:14,965 twisted Unhandled Error
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1155, in gotResult
    _inlineCallbacks(r, g, deferred)
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1145, in _inlineCallbacks
    deferred.errback()
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 423, in errback
    self._startRunCallbacks(fail)
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 490, in _startRunCallbacks
    self._runCallbacks()
--- <exception caught here> ---
  File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 577, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/usr/lib/python2.7/dist-packages/maasserver/rpc/regionservice.py", line 426, in handshakeFailed
    return self.transport.loseConnection()
exceptions.AttributeError: 'NoneType' object has no attribute 'loseConnection'