changing port will fail

[Yoshi Kadokawa]

Due to security request from the customer, I need to change the default port for mongoDB from 27017 to something else.

I have deployed mongodb with the following command, however, it will fail.

$ juju deploy --series focal mongodb --config port=57017

The error in /var/log/juju/unit-mongodb-0.log looks like this:

2023-01-24 01:08:45 INFO unit.mongodb/0.juju-log server.go:316 Entering config_changed
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 Traceback (most recent call last):
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/var/lib/juju/agents/unit-mongodb-0/charm/hooks/config-changed", line 2310, in <module>
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 hooks.execute(sys.argv)
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/var/lib/juju/agents/unit-mongodb-0/charm/hooks/charmhelpers/core/hookenv.py", line 963, in execute
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 self._hooks[hook_name]()
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/var/lib/juju/agents/unit-mongodb-0/charm/hooks/config-changed", line 1293, in config_changed
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 if version.parse(get_mongod_version()) < version.parse("4.2"):
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/var/lib/juju/agents/unit-mongodb-0/charm/hooks/config-changed", line 1614, in get_mongod_version
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 return c.server_info()["version"]
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/mongo_client.py", line 1866, in server_info
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 return self.admin.command("buildinfo",
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/database.py", line 729, in command
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 with self.__client._socket_for_reads(
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3.8/contextlib.py", line 113, in __enter__
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 return next(self.gen)
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/mongo_client.py", line 1298, in _socket_for_reads
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 server = self._select_server(read_preference, session)
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/mongo_client.py", line 1253, in _select_server
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 server = topology.select_server(server_selector)
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/topology.py", line 233, in select_server
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 return random.choice(self.select_servers(selector,
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/topology.py", line 192, in select_servers
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 server_descriptions = self._select_servers_loop(
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 File "/usr/lib/python3/dist-packages/pymongo/topology.py", line 208, in _select_servers_loop
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 raise ServerSelectionTimeoutError(
2023-01-24 01:09:45 WARNING unit.mongodb/0.config-changed logger.go:60 pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused
2023-01-24 01:09:46 ERROR juju.worker.uniter.operation runhook.go:140 hook "config-changed" (via explicit, bespoke hook script) failed: exit status 1

It will also fail when using 3.6/edge channel as well, and dpe/edge channel does not support changing port.

[Yoshi Kadokawa (yoshikadokawa)]

Attaching juju-crashdump