Python Flask Service file is not starting

Question

I wrote a small app. The app works great. However I am trying to create a service file and I am running into issues. Running the command sudo uwsgi uwsgi.ini works. App starts up. I created a service file.

[Unit]
Description=uWsgi instance to start relay site
After=network.target

[Service]
User=pi
Group=pi
WorkingDirectory=/var/www/relay
ExecStart=sudo uwsgi uwsgi.ini

[Install]
WantedBy=multi-user.target

The service file errors when I try to start it.

Loaded: error (Reason: Invalid argument)
relay.service: Unit entered failed state.
relay.service: Failed with result 'exit-code'.
[/etc/systemd/system/relay.service:11] Executable path is not absolute, ignoring: uwsgi uwsgi.ini
relay.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
[/etc/systemd/system/relay.service:9] Executable path is not absolute, ignoring: sudo uwsgi uwsgi.ini
relay.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.

Answer 1

It says Executable path is not absolute because the executable is sudo and not /usr/bin/sudo . Systemd needs the full path because it does not use a shell as you do when you use a terminal.

Also, if you're going to sudo the command then you might as well use root as the user instead (which is the default). Something like this should work:

[Service]
WorkingDirectory=/var/www/relay
ExecStart=/absolute/path/to/uwsgi uwsgi.ini

You can run which uwsgi to find the absolute path to uwsgi .