Comment 11 for bug 1787381

Hi, after upgrading to MAAS 2.5.0-7442-gdf68e30a5-0ubuntu1~18.04 I had to set the proxy port manually again via
~# maas <user> maas set-config name=maas_proxy_port value=8000

because I was getting these errors endlessly repeated in /var/log/maas/rackd.log:
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2019-01-17 22:34:16 provisioningserver.rackdservices.external: [critical] Failed to get external services configurations.
        Traceback (most recent call last):
        Failure: twisted.protocols.amp.UnhandledCommand: (b'UNHANDLED', 'Unknown Error [maas:pid=931:cmd=GetProxyConfiguration:ask=72c]')

2019-01-17 22:34:21 provisioningserver.rackdservices.external: [critical] Failed to get external services configurations.
        Traceback (most recent call last):
        Failure: twisted.protocols.amp.UnhandledCommand: (b'UNHANDLED', 'Unknown Error [maas:pid=929:cmd=GetProxyConfiguration:ask=73b]')

2019-01-17 22:34:26 provisioningserver.rackdservices.external: [critical] Failed to get external services configurations.
        Traceback (most recent call last):
        Failure: twisted.protocols.amp.UnhandledCommand: (b'UNHANDLED', 'Unknown Error [maas:pid=929:cmd=GetProxyConfiguration:ask=741]')

2019-01-17 22:34:31 provisioningserver.rackdservices.external: [critical] Failed to get external services configurations.
        Traceback (most recent call last):
        Failure: twisted.protocols.amp.UnhandledCommand: (b'UNHANDLED', 'Unknown Error [maas:pid=932:cmd=GetProxyConfiguration:ask=7aa]')
---

And the proxy was starting and stopping all the time.