使用nginx+docker做node负载均衡使用nginx+docker做node负载均衡

配置Nginx 修改nginx.conf：

http{ .... 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; } } }

【使用nginx+docker做node负载均衡】这里在3000端口和3001端口各有一个Node.js服务器，这两个服务器在做同样的工作。在upstream节，配置了两个Node.js服务器。此外，我们还设置了proxy_pass http://sample做HTTP请求代理。
启动 nginx:

sudo nginx nginx: [emerg] bind() to 0.0.0.0:80 failed (48: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (48: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (48: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (48: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (48: Address already in use)

构建NodeJS服务器创建 test.js 文件

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/'); });

初始化 package.json

npm init

安装依赖模块

npm install http npm install morgan

启动 node:

node test.js

访问Nginx服务器现在我们可以访问http://127.0.0.1 可以看到如下的输出：

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

可以看到连续两次请求在轮流访问两个服务
这个时候在看看直接访问node服务 http://127.0.0.1:3000/