Relevant telegraf.conf

[[inputs.mongodb]]
  servers = ["mongodb://192.168.10.81:27017"]
  gather_perdb_stats = true
  gather_col_stats = true
  gather_top_stat = true
  col_stats_dbs = ["jschan"]

Logs from Telegraf

No logs. No errors.

System info

Telegraf 1.24.0 (git: HEAD@3c4a6516), Debian 11.4, LXC

Docker

N/A

Steps to reproduce

1. Install Telegraf
2. Configure required output and input
3. Verify connectivity outside of Telegraf
   ...

Expected behavior

I expect Telegraf to connect to my MongoDB and pull the configured metrics.

root@influx:~# telnet 192.168.10.81 27017
Trying 192.168.10.81...
Connected to 192.168.10.81.
Escape character is '^]'.
^]
telnet> quit
Connection closed.

Actual behavior

Nothing happens. Nothing is logged.

When I run: telegraf --config /etc/telegraf/telegraf.conf --input-filter mongodb --test there is no output. It doesn't even try to connect from what I can tell. TCPDump shows zero packets going to my MongoDB server.

root@influx:~# telegraf --config /etc/telegraf/telegraf.conf --input-filter mongodb --test
2022-09-18T16:36:30Z I! Starting Telegraf 1.24.0
2022-09-18T16:36:30Z I! Available plugins: 222 inputs, 9 aggregators, 26 processors, 20 parsers, 57 outputs
2022-09-18T16:36:30Z I! Loaded inputs: mongodb
2022-09-18T16:36:30Z I! Loaded aggregators: 
2022-09-18T16:36:30Z I! Loaded processors: 
2022-09-18T16:36:30Z W! Outputs are not used in testing mode!
2022-09-18T16:36:30Z I! Tags enabled: host=influx.unfufadoo.net

Additional info

Proxmox VE is the primary host. InfluxDB runs in a container. MongoDB runs in another container. Everything is on the same subnet with no internal firewalls between the containers.

Can someone help me figure this out? I am out of ideas.

Regards,
Jeff