Problem in a nutshell: systemd creates a socket on boot, but it is not possible to restart or recreate it without a reboot.
/etc/systemd/system/gunicorn.socket
[Unit]
Description=gunicorn socket
[Socket]
ListenStream=/run/gunicorn.sock
[Install]
WantedBy=sockets.target
After reboot, /run/gunicorn.sock exists and I can connect to it with sudo gunicorn3 --bind unix:/run/gunicorn.sock test.wsgi. But after taking that process down with Ctrl+C, the socket disappears and cannot be recreated via sudo systemctl start gunicorn.socket. Incidentally, sudo systemctl status gunicorn.socket still shows the socket as active and OK.
Is something wrong or are my expectations off here (I'm not yet very familiar with systemd)?
Bonus question: I've tried to make the socket owned by the www-data user by adding "User=www-data" to the [Socket] stanza of the config file, but the socket is still owned by root.root. Where's my mistake?
