Node.js支持跨服务器的多个负载平衡？

var httpProxy = require('http-proxy');
//
// A simple round-robin load balancing strategy.
//
// First,list the servers you want to use in your rotation.
//
var addresses = [
  {
    host: 'ws1.0.0.0',port: 80
  },{
    host: 'ws2.0.0.0',port: 80
  }
];

httpProxy.createServer(function (req,res,proxy) {
  //
  // On each request,get the first LOCATIOn from the list...
  //
  var target = addresses.shift();

  //
  // ...then proxy to the server whose 'turn' it is...
  //
  proxy.proxyrequest(req,target);

  //
  // ...and then the server you just used becomes the last item in the list.
  //
  addresses.push(target);
});

// Rinse; repeat; enjoy.