Python script SystemD example

app.py

from time import sleep
import os

hi = os.environ.get('HELLO')

seconds = 1

while(True):
    sleep(1)
    print("logging...", seconds, "Env Var: ", hi)
    seconds +=1

superlogger

HELLO='Chambering The Chamber'

superlogger.service

[Unit]
Description=SystemD Test Service!
After=network.target

[Service]
User=chambers
Group=chambers
EnvironmentFile=/etc/default/superlogger
WorkingDirectory=/home/my_user/my_project/systemd-templates
ExecStart=/usr/bin/python3 -u app.py
Restart=on-failure

[Install]
WantedBy=multi-user.target

Notes

• The -u parameter starts Python in unbuffered mode, chaining the print() output to journalctl
• The WorkingDirectory is where the script app.py is located
• Place the superlogger environment file inside /etc/default