Hook error when removing kubernetes-worker units

[George Kraft]

After trying to remove a kubernetes-worker unit, the tigera-secure-ee subordinate hit a hook error:

unit-tigera-secure-ee-1: 15:50:21 INFO unit.tigera-secure-ee/1.juju-log kube-api-endpoint:13: Invoking reactive handler: reactive/calico.py:346:watch_for_api_endpoint_changes
unit-tigera-secure-ee-1: 15:50:22 ERROR unit.tigera-secure-ee/1.juju-log kube-api-endpoint:13: Hook error:
Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/.venv/lib/python3.6/site-packages/charms/reactive/__init__.py", line 73, in main
    bus.dispatch(restricted=restricted_mode)
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 390, in dispatch
    _invoke(other_handlers)
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 359, in _invoke
    handler.invoke()
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/.venv/lib/python3.6/site-packages/charms/reactive/bus.py", line 181, in invoke
    self._action(*args)
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/charm/reactive/calico.py", line 348, in watch_for_api_endpoint_changes
    apiserver_ips = get_apiserver_ips()
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/charm/reactive/calico.py", line 358, in get_apiserver_ips
    for api_service in kube_api_endpoint.services():
  File "/var/lib/juju/agents/unit-tigera-secure-ee-1/charm/hooks/relations/http/requires.py", line 71, in services
    for h, pa, p in host_set]
UnboundLocalError: local variable 'service' referenced before assignment

[George Kraft (cynerva)]

Opened https://github.com/juju-solutions/interface-http

[George Kraft (cynerva)]

Fixed, this should go out with cs:~containers/tigera-secure-ee-9 later tonight.