《用Nginx做NodeJS應用的負載均衡》
負載均衡可以把用戶的請求分攤到多個服務器上進行處理,從而實現了對海量用戶的訪問支持。負載均衡的架構如圖所示:
對於複雜的Web應用來說,用Nginx做前端負載均衡是理所當然的事。
下面,我們用Nginx做NodeJS應用的負載均衡。
1、配置Nginx
修改nginx.conf:
- ....
- upstream sample {
- server 127.0.0.1:3000;
- server 127.0.0.1:3001;
- keepalive 64;
- }
- server {
- listen 80;
- ....
- server_name 127.0.0.1;
- ....
- location / {
- proxy_redirect off;
- proxy_set_header X-Real-IP $remote_addr;
- proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
- proxy_set_header X-Forwarded-Proto $scheme;
- proxy_set_header Host $http_host;
- proxy_set_header X-NginX-Proxy true;
- proxy_set_header Connection "";
- proxy_http_version 1.1;
- proxy_pass http://sample;
- }
- }
2、構建NodeJS服務器
- var http = require('http');
- var morgan = require('morgan');
- var server1 = http.createServer(function (req, res) {
- console.log("Request for: " + req.url + "-- port 3000 ");
- res.writeHead(200, {'Content-Type': 'text/plain'});
- res.end('Hello Node.js\n');
- }).listen(3000, "127.0.0.1");
- var server2 = http.createServer(function (req, res) {
- console.log("Request for: " + req.url + "-- port 3001 ");
- res.writeHead(200, {'Content-Type': 'text/plain'});
- res.end('Hello Node.js\n');
- }).listen(3001, "127.0.0.1");
- server1.once('listening', function() {
- console.log('Server running at http://127.0.0.1:3000/');
- });
- server2.once('listening', function() {
- console.log('Server running at http://127.0.0.1:3001/');
- });
現在我們可以訪問http://127.0.0.1
可以看到如下的輸出:
- Server running at http://127.0.0.1:3000/
- Server running at http://127.0.0.1:3001/
- Request for: /-- port 3001
- Request for: /favicon.ico-- port 3000
- Request for: /favicon.ico-- port 3001
- Request for: /-- port 3000
- Request for: /favicon.ico-- port 3001
- Request for: /favicon.ico-- port 3000
- Request for: /-- port 3001
- Request for: /favicon.ico-- port 3000
- Request for: /favicon.ico-- port 3001
- Request for: /-- port 3000
- Request for: /favicon.ico-- port 3001
- Request for: /favicon.ico-- port 3000
轉自:https://blog.csdn.net/chszs/article/details/43203127