安装nginx, 并下载对应模块

tar -xzvf nginx-1.2.1.tar.gz
patch -p1 < /path/to/nginx_tcp_proxy_module/tcp.patch

$ ./configure --add-module=/path/to/nginx_tcp_proxy_module

make install

修改nginx.conf文件

tcp {
  upstream cluster {
    # simple round-robin
    server 192.168.10.230:8888;
    server 192.168.10.230:8888;

    check interval=3000 rise=2 fall=5 timeout=1000 ;

    #check interval=3000 rise=2 fall=5 timeout=1000 type=ssl_hello;

    #check interval=3000 rise=2 fall=5 timeout=1000 type=http;
    #check_http_send "GET / HTTP/1.0\r\n\r\n";
    #check_http_expect_alive http_2xx http_3xx;
  }

  server {
    listen 8888;
    proxy_pass cluster;
  }
}

测试是否连接成功

telnet 127.0.0.1 8888

各服务端tcp代码

const net = require('net');

const PORT = 8888;
const HOST = '192.168.10.231';


var clientHandler = function(socket){

    //客户端发送数据的时候触发data事件
  socket.on('data', function dataHandler(data) {//data是客户端发送给服务器的数据
    console.log(socket.remoteAddress, socket.remotePort, 'send', data.toString());
        //服务器向客户端发送消息
    socket.write(`server ${HOST} received\n`);
  });

    //当对方的连接断开以后的事件
  socket.on('close', function(){
    console.log(socket.remoteAddress, socket.remotePort, 'disconnected');
  })
};

//创建TCP服务器的实例
//传入的参数是：监听函数clientHandler
var app = net.createServer(clientHandler);

app.listen(PORT, HOST);
console.log('tcp server running on tcp://', HOST, ':', PORT);

启动 tcp.js

node tcp.js

查看端口号

netstat -antp | grep 8888