designate-producer not starting after upgrade from bionic-queens to bionic-rocky using action-managed-upgrade

[Drew Freiberger]

Charm rev 19.07 cs:designate-33

After upgrading designate via:

juju config designate action-managed-upgrade=true openstack-origin=cloud:bionic-rocky

juju run-action --wait designate/1 openstack-upgrade

With a successful completion, designate/1 unit is showing status "blocked", "Services not running that should be: designate-producer"

designate-producer service dies with following in it's log:

2019-10-24 15:13:34.305 1729568 WARNING oslo_config.cfg [-] Deprecated: Option "enabled" from group "service:worker" is deprecated for removal (In Rocky, this option will disappear because worker will be enabled by default). Its value may be silently ignored in the future.
2019-10-24 15:13:34.306 1729568 INFO designate.metrics [-] Statsd disabled
2019-10-24 15:13:34.344 1729568 INFO designate.service [-] Starting producer service (version: 7.0.0)
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service [-] Error starting thread.: TypeError: '<' not supported between instances of 'str' and 'bytes'
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service Traceback (most recent call last):
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/oslo_service/service.py", line 794, in run_service
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service service.start()
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/designate/producer/service.py", line 72, in start
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service self._partitioner.start()
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/designate/coordination.py", line 223, in start
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service self._my_partitions = self._update_partitions()[1]
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service File "/usr/lib/python3/dist-packages/designate/coordination.py", line 200, in _update_partitions
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service members = sorted(list(self._get_members(self._group_id)))
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service TypeError: '<' not supported between instances of 'str' and 'bytes'
2019-10-24 15:13:34.385 1729568 ERROR oslo_service.service
2019-10-24 15:13:34.393 1729568 INFO designate.service [-] Stopping producer service