MobileRead Forums - View Single Post - Calibre-server systemd socket unit example

davidreads · 01-10-2020, 04:38 PM

Answering my own question for future readers.

I created the following systemd unit files:

calibre-server@.socket:

Code:

[Unit]
Description=Calibre Server socket

[Socket]
ListenStream=33154

[Install]
WantedBy=sockets.target

calibre-server@.service

Code:

[Unit]
Description=Calibre content server
After=network.target

[Service]
Type=simple
User=%i
Group=%i
ExecStart=/usr/bin/calibre-server --enable-allow-socket-preallocation "/home/%i/Media/Books/Calibre Library"
RuntimeMaxSec=300
Restart=no

[Install]
WantedBy=multi-user.target

I can then start them with:

Code:

systemctl start calibre-server@user1.socket

This will start the socket service for user1 to listen for connections. On connection, it will run calibre-server as user1 and serve the books out of that users's calibre library. The instance of calibre-server will stop after 5 minutes to minimize use of system resources but will start again on the next connection.

I can also add another socket unit named calibre-server@user2.socket with a different ListenStream to serve user2's library on a different port.

01-10-2020, 04:38 PM	#2
davidreads Junior Member Posts: 2 Karma: 10 Join Date: Jan 2020 Device: none	[SOLUTION] socket unit example Answering my own question for future readers. I created the following systemd unit files: calibre-server@.socket: Code: [Unit] Description=Calibre Server socket [Socket] ListenStream=33154 [Install] WantedBy=sockets.target calibre-server@.service Code: [Unit] Description=Calibre content server After=network.target [Service] Type=simple User=%i Group=%i ExecStart=/usr/bin/calibre-server --enable-allow-socket-preallocation "/home/%i/Media/Books/Calibre Library" RuntimeMaxSec=300 Restart=no [Install] WantedBy=multi-user.target I can then start them with: Code: systemctl start calibre-server@user1.socket This will start the socket service for user1 to listen for connections. On connection, it will run calibre-server as user1 and serve the books out of that users's calibre library. The instance of calibre-server will stop after 5 minutes to minimize use of system resources but will start again on the next connection. I can also add another socket unit named calibre-server@user2.socket with a different ListenStream to serve user2's library on a different port. Last edited by davidreads; 01-10-2020 at 04:40 PM.