錯誤：在連接主機時連接ETIMEDOUT

Question

我是nodejs和socket.io的新手，我嘗試通過socket.io與我的數據庫連接進行簡單聊天。但在使用node.js連接到主機時遇到問題。我正在使用亞馬遜服務器。請幫我解決這個問題。 這是我的代碼： -

var bodyParser = require('body-parser'); 
    var express = require('express'); 
    var config = require('./config/config'); 
    var io = require('socket.io')(); 
    var openDB = require('json-file-db'); 
    var db = openDB('db.json'); 
    var mysql = require('mysql'); 
    var gcm = require('node-gcm-service'); 
    var apn = require('apn'); 

    var app = express(); 
    app.listen(config.HTTP_PORT); // 3000 
    app.use(bodyParser.json()); 

    io.listen(config.SOCKET_PORT);//7777 

    console.log("Server is up"); 
    var connection = mysql.createConnection({ 

    host : 'xx.xx.xxx.xxx', 
    user : 'root', 
    password : 'my_password', 
    database : 'my_db' 
    }); 

    connection.connect(function(error){ 
     if(!!error) 
     { 
      console.log(error); 
      console.log('Error'); 
     } 
     else 
     { 
      console.log('connected'); 
     } 
    }); 



Error: connect ETIMEDOUT 
at Connection._handleConnectTimeout (/var/www/html/server1/node_modules/mysql/lib/Connection.js:425:13) 
at Socket.g (events.js:286:16) 
at emitNone (events.js:86:13) 
at Socket.emit (events.js:185:7) 
at Socket._onTimeout (net.js:333:8) 
at tryOnTimeout (timers.js:228:11) 
at Timer.listOnTimeout (timers.js:202:5) 
-------------------- 
at Protocol._enqueue (/var/www/html/server1/node_modules/mysql/lib/protocol/Protocol.js:141:48) 
at Protocol.handshake (/var/www/html/server1/node_modules/mysql/lib/protocol/Protocol.js:52:41) 
at Connection.connect (/var/www/html/server1/node_modules/mysql/lib/Connection.js:136:18) 
at Object. (/var/www/html/server1/app1.js:35:16) 
at Module._compile (module.js:541:32) 
at Object.Module._extensions..js (module.js:550:10) 
at Module.load (module.js:458:32) 
at tryModuleLoad (module.js:417:12) 
at Function.Module._load (module.js:409:3) 
at Module.runMain (module.js:575:10) 
errorno: 'ETIMEDOUT', 
code: 'ETIMEDOUT', 
syscall: 'connect', 
fatal: true 

Answer 1

你需要（默認爲3306）打開遠程MySQL端口。