linux-service-with-systemd.md

Create a Linux Service Using systemd

Create a systemd Service

/etc/systemd/system/djangoexample-boot.service

[Unit]
Description=Service for django.example.com
Before=nginx.service
StartLimitIntervalSec=0

[Service]
Type=simple
User=root
KillMode=process
Restart=on-failure
ExecStart=/bin/bash -c "echo 'script started' \
        && echo "Activating venv.." \
        && source /opt/django.example.com/venv/bin/activate \
        && python -V \
        && uwsgi --chdir=/opt/django.example.com/src \
            --module=djangoexample.wsgi:application \
            --env DJANGO_SETTINGS_MODULE=djangoexample.settings \
            --master \
            --pidfile=/tmp/django.example.com-master.pid \
            --http=localhost:8000 \
            --processes=5 \
            --harakiri=20 \
            --max-requests=5000 \
            --vacuum \
            --daemonize=/var/log/uwsgi/django.example.com.log \
        && echo 'Deactivating venv..' \
        && deactivate \
        && echo 'Terminating service..' \
        && systemctl stop djangoexample-boot.service"

[Install]
WantedBy=multi-user.target

• KillMode=process - Kill only the main process, this will prevent the child processes (uWSGI daemon process in our case) to from being killed. See https://www.freedesktop.org/software/systemd/man/systemd.kill.html#.

Start Service

$ systemctl start djangoexample-boot.service

Enable Service to Auto-Run on System Boot

$ systemctl enable djangoexample-boot.service

References

• systemd - https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units
• More about systemd - https://www.freedesktop.org/software/systemd/man/systemd.service.html (See Type=)
• uWSGI - https://docs.djangoproject.com/en/3.1/howto/deployment/wsgi/uwsgi/