Nodejs【单机】多进程模式集群

Nodejs【单机】多进程模式集群实例：

1、安装：npm install -s cluster

2、服务代码：

var debug = require('debug');

var express = require('express');

var path = require('path');

var favicon = require('serve-favicon');

var logger = require('morgan');

var cookieParser = require('cookie-parser');

var bodyParser = require('body-parser');

var routes = require('./routes/index');

var mockServer = function () {

    var app = express();

    // view engine setup

    app.set('views', path.join(__dirname, 'views'));

    app.set('view engine', 'pug');

    // uncomment after placing your favicon in /public

    //app.use(favicon(__dirname + '/public/favicon.ico'));

    app.use(logger('dev'));

    app.use(bodyParser.json());

    app.use(bodyParser.urlencoded({ extended: false }));

    app.use(cookieParser());

    app.use(express.static(path.join(__dirname, 'public')));

    app.use('/', routes);

    // catch 404 and forward to error handler

    app.use(function (req, res, next) {

        var err = new Error('Not Found');

        err.status = 404;

        next(err);

    });

    // error handlers

    // development error handler

    // will print stacktrace

    if (app.get('env') === 'development') {

        app.use(function (err, req, res, next) {

            res.status(err.status || 500);

            res.render('error', {

                message: err.message,

                error: err

            });

        });

    }

    // production error handler

    // no stacktraces leaked to user

    app.use(function (err, req, res, next) {

        res.status(err.status || 500);

        res.render('error', {

            message: err.message,

            error: {}

        });

    });

    process.env.PORT = 8103;

    app.set('port', process.env.PORT || 3000);

    var server = app.listen(app.get('port'), function () {

        console.log('服务启动：' + server.address().port);

    });

}

module.exports = exports = mockServer;

3、启动文件加集群模式：

var path = require("path");

var mockfile = path.join(__dirname, './', 'mockServer');

var mockServer = require(mockfile);

var cluster = require('cluster')

var numCPUs = require('os').cpus().length;

if (cluster.isMaster) {

    console.log("宿主启动...");

    //var data = 0;

    for (var i = 0; i < numCPUs; i++) {

        //cluster.fork();

        var worker_process = cluster.fork();

        //侦听子进程的message事件 

        worker_process.on('message', function (msg) {

            if (msg.cmd && msg.cmd == 'notifyRequest') {

                //data++;

                //console.log('DATA VALUE : %d ', data);

            }

        });

    }

    cluster.on('listening', function (worker, address) {

        //console.log('pid:' + worker.process.pid);

    });

    cluster.on('exit', function (worker, code, signal) {

        console.log('pid:' + worker.process.pid + ' 重启');

        setTimeout(function () { cluster.fork(); }, 2000);

    });

} else {

    var server = new mockServer();

    process.on('message', function (msg) {

        if (msg === 'shutdown') {

            // initiate graceful close of any connections to server

        }

    });

    console.log('worker #' + cluster.worker.id + ",pid:" + cluster.worker.process.pid);

    //process.send({ cmd: 'notifyRequest' });

}