Pulp

Numbers to show impact: https://bugzilla.redhat.com/show_bug.cgi?id=1609928#c5

Cron configuration to make this task run regularly is enough to fix this task.
The suggestion is to put it into /etc/cron.monthly and ship this config with rpm installation.

ttereshc excellent! Also remove this part of the code with that change too: https://github.com/pulp/pulp/blob/2-master/server/pulp/server/async/celery_instance.py#L30-L33

This is working for me. I have the latest branch head of pulp/pulp:2-master and pulp/pulp_rpm:2-master. I applied the following diff to test it:

diff --git a/server/pulp/server/async/celery_instance.py b/server/pulp/server/async/celery_instance.py
index eab2ea3dd..9b486e8a5 100644
--- a/server/pulp/server/async/celery_instance.py
+++ b/server/pulp/server/async/celery_instance.py
@@ -29,7 +29,7 @@ CELERYBEAT_SCHEDULE = {
     },
     'monthly_maintenance': {
         'task': 'pulp.server.maintenance.monthly.queue_monthly_maintenance',
-        'schedule': timedelta(days=30),
+        'schedule': timedelta(seconds=60),
         'args': tuple(),
     },
     'download_deferred_content': {
diff --git a/server/pulp/server/maintenance/monthly.py b/server/pulp/server/maintenance/monthly.py
index 58e51f247..365496ea0 100644
--- a/server/pulp/server/maintenance/monthly.py
+++ b/server/pulp/server/maintenance/monthly.py
@@ -10,6 +10,7 @@ def queue_monthly_maintenance():
     """
     Create an itinerary for monthly task
     """
+    raise Exception('oh no!')
     tags = [action_tag('monthly')]
     monthly_maintenance.apply_async(tags=tags)

Then I got the following output upon startup:

kombu.transport.qpid:INFO: Connected to qpid with SASL mechanism ANONYMOUS
celery.beat:INFO: Scheduler: Sending due task monthly_maintenance (pulp.server.maintenance.monthly.queue_monthly_maintenance)
celery.worker.strategy:INFO: Received task: pulp.server.maintenance.monthly.queue_monthly_maintenance[e465c5d5-4385-4dcb-89ff-24013669c252]
celery.app.trace:ERROR: [e465c5d5] (18124-49472) Task pulp.server.maintenance.monthly.queue_monthly_maintenance[e465c5d5-4385-4dcb-89ff-24013669c252] raised unexpected: Exception('oh no!',)
celery.app.trace:ERROR: [e465c5d5] (18124-49472) Traceback (most recent call last):
celery.app.trace:ERROR: [e465c5d5] (18124-49472)   File "/usr/lib/python2.7/site-packages/celery/app/trace.py", line 367, in trace_task
celery.app.trace:ERROR: [e465c5d5] (18124-49472)     R = retval = fun(*args, **kwargs)
celery.app.trace:ERROR: [e465c5d5] (18124-49472)   File "/home/vagrant/devel/pulp/server/pulp/server/async/tasks.py", line 107, in __call__
celery.app.trace:ERROR: [e465c5d5] (18124-49472)     return super(PulpTask, self).__call__(*args, **kwargs)
celery.app.trace:ERROR: [e465c5d5] (18124-49472)   File "/usr/lib/python2.7/site-packages/celery/app/trace.py", line 622, in __protected_call__
celery.app.trace:ERROR: [e465c5d5] (18124-49472)     return self.run(*args, **kwargs)
celery.app.trace:ERROR: [e465c5d5] (18124-49472)   File "/home/vagrant/devel/pulp/server/pulp/server/maintenance/monthly.py", line 13, in queue_monthly_maintenance
celery.app.trace:ERROR: [e465c5d5] (18124-49472)     raise Exception('oh no!')
celery.app.trace:ERROR: [e465c5d5] (18124-49472) Exception: oh no!

I am using Celery 4.0.2-3 with python2-celery-4.0.2-3.fc27.noarch.