之前一直沒有接觸NODEJS，前幾天運維把內網虛擬機關閉了，后臺上傳功能失效，WHAT

一看地址502，然后看nginx ERROR日志如下：

2018/04/08 09:02:11 [error] 13215#0: *69 connect() failed (111: Connection refused) while connecting to upstream, client: 10.200.16.111, server: upload1.vision.demo1.**.com, request: "GET /v1/upload_widget?return=http://cms.demo1.***.com/upload_callback&callback=uploadCallback HTTP/1.1", upstream: "http://127.0.0.1:4000/v1/upload_widget?return=http://cms.demo1.***.com/upload_callback&callback=uploadCallback", host: "upload1.vision.demo1.***.com"

明確提示了，上游連接不了

又試了一下：

本地都連接不上，明顯端口沒有監聽啊

netstat -tunlp

忘截圖了，反正是果然沒有沒有應用監聽

翻了一下代碼，WHAT，里面是NODE JS代碼

恩，百度了一下NODE JS的啟動方法

原來是要啟動進程，看了一下nodejs.sh里

如下：

#!/bin/bash

killall node
#nohup node /home/pp/web/storage/manager.js >>/tmp/node.log 2>&1 &

nohup node /home/pp/web/storage-1.3.4/manager.js >>/tmp/node.log 2>&1 &

manager.js代碼如下：

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


if (cluster.isMaster) {
? ? // Fork workers.
? ? for (var i = 0; i < numCPUs; i++) {
? ? ? ? var worker = cluster.fork();
? ? ? ? console.log(worker.process.pid)
? ? }

? ? cluster.on('exit', function(worker, code, signal) {
? ? ? ? console.log('worker ' + worker.process.pid + ' died');
? ? ? ? process.nextTick(function () {
? ? ? ? ? ? cluster.fork();
? ? ? ? });
? ? });


} else {
? ? var app = require('./app.js');
? ? console.log('進程啟動成功！');
}

app.js代碼如下：

/**
?* Module dependencies.
?*/


var express = require('express')
? ? , routes = require('./routes')
? ? , user = require('./routes/user')
? ? , uploads = require('./routes/uploads')
? ? , http = require('http')
? ? , object = require("./routes/object")
? ? , monitor = require("./routes/monitor")
? ? , path = require('path');


var app = express();


app.configure(function () {
? ? app.set('config', require('./config/default'));
});


app.configure('dev', function () {
? ? app.set('config', require('./config/dev'));
});
app.configure('test', function () {
? ? app.set('config', require('./config/test'));
});
app.configure('beta', function () {
? ? app.set('config', require('./config/beta'));
});

app.configure(function () {
? ? app.set('port', process.env.PORT || 4000);
? ? app.set('views', __dirname + '/views');
? ? app.set('view engine', 'jade');
? ? app.use(express.favicon());
? ? app.use(express.logger('dev'));
? ? app.use(express.bodyParser({hash: "sha1"}));
? ? app.use(express.methodOverride());
? ? app.use(express.cookieParser('your secret here'));
? ? app.use(require('./middleware/config')(app));
? ? app.use(express.session());
? ? app.use(app.router);
? ? app.use(express.static(path.join(__dirname, 'public')));
? ? app.use(require('./middleware/error')());
});


var connect = require('express/node_modules/connect')
? ? , mime = connect.mime;


app.configure('dev', function () {
? ? app.use(express.errorHandler());
});

app.get('/upload', uploads.start);
app.get("/index", routes.index);
app.get('/v1/upload_widget', uploads.start);
app.post("/v1/upload_widget",uploads.upload_widget);
app.get('/v1/upload_object', object.start);
app.post('/v1/upload_object', object.saveOBJ);

app.post("/v1/url", uploads.uploadURL);
app.post('/v:id/upload', uploads.apiUpload);
app.post('/v:id/uploadData', uploads.apiUploadData);
app.post('/v:id/objects', object.saveOBJ);
app.put('/v:id/objects', object.saveOBJ);
app.delete('/v:id/objects', object.deleteObj);


app.post('/v:id/url', uploads.uploadURL);
app.get('/v:id/*', function (req, res) {
? ? var msg = req.config("apiMessage");
? ? console.log(req.config("dev"));
? ? res.send(msg);
});


app.get("/monitor", monitor.check);
http.createServer(app).listen(app.get('port'), function () {
? ? console.log("Express server listening on port " + app.get('port'));

});

最終的解決方式是

? chmod a+x nodejs.sh #給nodejs.sh可執行權限

??執行 ./nodejs.sh

OVER,502結束！

總結

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