clusterjs/bin/cluster.js

Clusterify your NodeJS applications and deploy without downtimes. Just like that.

#!/usr/bin/env node
var cluster = require('cluster');

var clusterjs = require('../cluster.js'),
    argv = require('yargs').argv;

var help = 'Cluster.js help: \n\n' +
           'Usage: clusterjs [path to app] [options] \n\n' +
           'Options:\n'+
           ' --workers\t Defines how many workers we should launch (Default: CPU count)\n' +
           ' --reloadon\t On Which signal will the cluster be reloaded (Default: SIGUSR2)' +
            '\n\n';

var workers = argv.workers  || require('os').cpus().length;
var reloadSignal = argv.reloadon || 'SIGUSR2';
var appName = argv['_'][0] || process.env.APP || null;

if (cluster.isMaster) {
    if (appName === null || argv.help) {
        console.log(help);
        process.exit();
    } else {
        console.log('Booting a cluster of ' + appName);
        console.log('We are gonna be launching ' + workers + ' workers');
        console.log('The cluster will reload on: ' + reloadSignal);
    }
}

clusterjs(appName, workers, reloadSignal);