Adds support for running node.js as a socket-activated service under systemd.
For more background on socket activation: http://0pointer.de/blog/projects/socket-activation.html
Obviously, this will only work on Linux distributions with systemd (such as Fedora).
Developed by Flow Pilots: http://www.flowpilots.com/
You can install the latest version via npm:
$ npm install systemd
Require the systemd module and pass 'systemd' as a parameter to listen():
require('systemd');
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen('systemd');
Install a systemd socket file (e.g.: /etc/systemd/system/node-hello.socket):
[Socket]
ListenStream=1337
[Install]
WantedBy=sockets.target
Install a systemd service file (e.g.: /etc/systemd/system/node-hello.service):
# Adjust according to man 5 systemd.exec
[Service]
ExecStart=/path/to/bin/node /path/to/hello.js
StandardOutput=syslog
User=nobody
Group=nobody
Be sure to subtitute the paths to node and your script!
Enable and start the socket:
systemctl enable node-hello.socket
systemctl start node-hello.socket
Check the status of the socket:
# systemctl status node-hello.socket
node-hello.socket
Loaded: loaded (/etc/systemd/system/node-hello.socket)
Active: active (listening) since Sat, 15 Oct 2011 20:27:47 +0200; 2s ago
CGroup: name=systemd:/system/node-hello.socket
Great, it's running!
Enable the service:
systemctl enable node-hello.service
Check the status, not running yet:
# systemctl status node-hello.service
node-hello.service
Loaded: loaded (/etc/systemd/system/node-hello.service)
Active: inactive (dead)
CGroup: name=systemd:/system/node-hello.service
Do a request to your service:
# curl -i http://localhost:1337/
HTTP/1.1 200 OK
Content-Type: text/plain
Connection: keep-alive
Transfer-Encoding: chunked
Hello World
Check again, now it will be running:
# systemctl status node-hello.service
node-hello.service
Loaded: loaded (/etc/systemd/system/node-hello.service)
Active: active (running) since Sat, 15 Oct 2011 20:32:10 +0200; 38s ago
Main PID: 1159 (node)
CGroup: name=systemd:/system/node-hello.service
└ 1159 /path/to/bin/node /path/to/hello.js
You can make the systemd usage conditional by checking for the systemd environment variable:
var http = require('http');
require('systemd');
var port = process.env.LISTEN_PID > 0 ? 'systemd' : 1337;
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(port);
This makes it possible to run the script stand-alone in development, yet use systemd when started through systemd.
(The MIT License)
Copyright (C) 2011-2012 by Ruben Vermeersch <ruben@savanne.be>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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THE SOFTWARE.