Ubuntu Server 16.04 systemctl service with python script is running but not working

i have read a lot of posts on this site on how to implement a python script as a service.

After fiddling around i am at the point that the service is started via systemctl (and running) but the script is doing nothing...

My config file in /etc/systemd/system/:

[Unit]
Description=tg Bot

[Service]
Type=simple
User=user
WorkingDirectory=/home/user/tg_onduty/
ExecStart=/usr/bin/python3 /home/user/tg_onduty/on_duty.py
Restart=always

[Install]
WantedBy=multi-user.target

Output:

user@server:~$ sudo service tg_onduty status
● tg_onduty.service - Telegram OnDuty Bot
   Loaded: loaded (/etc/systemd/system/tg_onduty.service; enabled; vendor preset
   Active: active (running) since Thu 2018-02-15 11:28:20 CET; 2min 17s ago
 Main PID: 1538 (python3)
    Tasks: 9
   Memory: 17.7M
      CPU: 351ms
   CGroup: /system.slice/tg_onduty.service
           └─1538 /usr/bin/python3 /home/user/tg_onduty/on_duty.py

I have read https://unix.stackexchange.com/questions/339638/difference-between-systemd-and-terminal-starting-program/339645#339645 and understand that running the script via systemctl is different than running via CLI (via CLI /usr/bin/python3 /home/user/tg_onduty/on_duty.py is working).

My question is now:

How can i trace or see whats going wrong or why the script seems to do nothing? Via Journalctl i only see: Feb 15 11:56:17 server systemd[1]: Started tg Bot.

Any help is appreciated.

Thanks,

David

Solution

Are you sure you script not running at all? try to put logs in your script to see if something inside the script doesn't work.