使用NGINX的多节点服务器的负载均衡请求流量 [英] Load balance request traffic with muiltiple Node servers using NGINX

问题描述

根据此 答案 :

According to this answer:

您应该在一个盒子上运行多个节点服务器，每个核心服务器1个，并在它们之间分配请求流量.这样可以提供出色的CPU亲和力，并且可以与内核数几乎线性地扩展吞吐量.

You should run multiple Node servers on one box, 1 per core and split request traffic between them. This provides excellent CPU-affinity and will scale throughput nearly linearly with core count.

知道了，所以为了简单起见，我们的盒子有2个核心.

Got it, so let's say our box has 2 cores for simplicity.

我需要一个完整的示例，该示例使用NGINX在两个Node服务器之间实现负载均衡.

I need a complete example a Hello World app being load balanced between two Node servers using NGINX.

这也应包括所有NGINX配置.

This should include any NGINX configuration as well.

推荐答案

app.js

var http = require('http');
var port = parseInt(process.argv[2]);

http.createServer(function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Hello World\n');
}).listen(port);

console.log('Server running at http://localhost:' + port + '/');

nginx配置

upstream app  {
  server localhost:8001;
  server localhost:8002;
}

server {
  location / {
    proxy_pass  http://app;
  }
}

启动您的应用

node app.js 8001
node app.js 8002

HttpUpstreamModule文档

其他阅读材料

• 集群模块-仍处于实验阶段，但您不需要nginx
• 永久模块-以防您的应用崩溃
• nginx和websockets -如何代理websockets在新的nginx版本中

• cluster module - still experimental, but you don't need nginx
• forever module - in case your app crashes
• nginx and websockets - how to proxy websockets in the new nginx version

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