Question

文档看起来非常简单，可以实现Throng以使用Heroku创建其他Web工作者。话虽如此，它给我留下了几个问题：

1）我是否还需要安装Cluster;从我读到的内容Throng是Cluster的抽象，但我没有看到下载中包含Cluster。我错过了什么，或者Throng是否准备好开箱即用？

2）我在哪里放了几行代码？ Angular Fullstack在服务器目录中有一个服务器目录和一个app.js文件。这是我最好的选择，但我可以想象，它可能更好地放在配置目录中，甚至可能放在其他地方。

3）我需要以什么顺序要求Throng？我明白，如果事情发生故障，可能会搞砸。如果app.js是放置var throng = require（'throng'）的正确位置。

以下链接是我对Throng方向的参考： https://github.com/goodeggs/heroku-web-cluster

我将以下代码放在'start server'下的app.js文件中：

var throng = require('throng');
var WORKERS = process.env.WEB_CONCURRENCY || 1;
var start = function(){
  process.on('SIGTERM', function() {
    console.log('Worker exiting');
    process.exit();
  });
}
throng(start, {
  workers: 1,
  lifetime: Infinity,
});

当我这样做时，我在终端本地部署时会收到一个快速重复的错误：

Error: bind EADDRINUSE
    at exports._errnoException (util.js:746:11)
    at cb (net.js:1178:33)
    at rr (cluster.js:592:14)
    at Worker.<anonymous> (cluster.js:563:9)
    at process.<anonymous> (cluster.js:692:8)
    at process.emit (events.js:129:20)
    at handleMessage (child_process.js:324:10)
    at Pipe.channel.onread (child_process.js:352:11)
Debugger listening on port 5889
events.js:85
      throw er; // Unhandled 'error' event

        ^

Answer 1

var express = require('express');
var cluster = require('cluster'); //no need to download anything
var os = require('os'); //no need to download anything

if(cluster.isMaster) {
   var numWorkers = os.cpus().length;
   console.log('Master cluster setting up ' + numWorkers + ' workers...');

   for(var i = 0; i < numWorkers; i++) {
       cluster.fork();
   }

   cluster.on('online', function(worker) {
       console.log('Worker ' + worker.process.pid + ' is online');
   });

   cluster.on('exit', function(worker, code, signal) {
       console.log('Worker ' + worker.process.pid + ' died with code: ' + code + ', and signal: ' + signal);
       console.log('Starting a new worker');
       cluster.fork();
   });
} else {
   var app = require('express')();
   var server = require('http').createServer(app);
   require('./config/express')(app);
   require('./routes')(app);

   // Start server
   server.listen(config.port, config.ip, function () {
     console.log('Express server listening on %d, in %s mode', config.port, app.get('env'));
   });
}

如何使用Angular Fullstack部署Throng或Cluster？

1 个答案: