The region process doesn't start properly after 'maas init' in the snap

[Björn Tillenius]

After installing the snap and running 'maas init' to set up MAAS, I can't connect to the MAAS URL. This is in the regiond.log:

  https://paste.ubuntu.com/p/DNCBhQ887b/

If I restart supervisord, MAAS starts properly.

I tested this with revision 30cf5f1d27917dc8a45949a03f6fd34c0f0d6c88

After some bisecting, it seems that this is the commit that is to blame:

commit 7e74081aa6f6b3a7987e5da9287d1c6054e6d41c
Author: Blake Rouse <email address hidden>
Date: Mon Mar 19 22:34:50 2018 +0000

    Add options to regiond.conf and snap to adjust the number of regiond workers and enable debugging.

[Björn Tillenius (bjornt)]

018-04-04 09:28:00 twisted.scripts: [info] twistd 17.9.0 (/snap/maas/x1/usr/bin/python3 3.6.5) starting up.
2018-04-04 09:28:00 twisted.scripts: [info] reactor class: twisted.internet.asyncioreactor.AsyncioSelectorReactor.
2018-04-04 09:28:00 maasserver.start_up: [error] Database error during start-up
Traceback (most recent call last):
  File "/snap/maas/x1/usr/lib/python3/dist-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
psycopg2.ProgrammingError: relation "maasserver_config" does not exist
LINE 1: ..._config"."name", "maasserver_config"."value" FROM "maasserve...
                                                             ^

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/start_up.py", line 67, in start_up
    yield security.get_shared_secret()
  File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 250, in inContext
    result = inContext.theWork()
  File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 266, in <lambda>
    inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
  File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/context.py", line 122, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/snap/maas/x1/usr/lib/python3/dist-packages/twisted/python/context.py", line 85, in callWithContext
    return func(*args,**kw)
  File "/snap/maas/x1/lib/python3.6/site-packages/provisioningserver/utils/twisted.py", line 875, in callInContext
    return func(*args, **kwargs)
  File "/snap/maas/x1/lib/python3.6/site-packages/provisioningserver/utils/twisted.py", line 232, in wrapper
    result = func(*args, **kwargs)
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/utils/orm.py", line 712, in call_with_connection
    return func(*args, **kwargs)
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/utils/__init__.py", line 192, in call_with_lock
    return func(*args, **kwargs)
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/utils/orm.py", line 756, in call_within_transaction
    return func_outside_txn(*args, **kwargs)
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/utils/orm.py", line 563, in retrier
    return func(*args, **kwargs)
  File "/snap/maas/x1/usr/lib/python3.6/contextlib.py", line 52, in inner
    return func(*args, **kwds)
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/security.py", line 87, in get_shared_secret_txn
    secret_in_db_hex = Config.objects.get_config("rpc_shared_secret")
  File "/snap/maas/x1/lib/python3.6/site-packages/maasserver/models/config.py", line 151, in get_config
    return self.get(name=name).value
  File "/snap/maas/x1/usr/lib/python3/dist-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/snap/maas/x1/usr/lib/python3/dist-packages/django/db/models/query.py", line 374, in get
    num = len(clone)
  File "/snap/maas/x1/usr/lib/python3/dist-packages/dj...

[Björn Tillenius (bjornt)]

This is no longer an issue. I guess some commit fixed this issue as a side effect.