failover-proxy

TCP proxy with a dynamic fallback, designed for high availability systems.

When proxy receives an error from the receiving side (e.g. your backend servers), it redirects the traffic to the next server from the pool, assuring that data gets buffered in between requests.

Installation

npm install failover-proxy

Usage

API

var proxy = require('failover-proxy')({
  hosts: [
    {
      host: '127.0.0.1',
      port: 9001
    },
    {
      host: '127.0.0.1',
      port: 9002
    }
  ]
});

proxy.listen(9000);

proxy.on('cycle', function (badHost, newHost) {
  //
  // `cycle` event happens when proxy couldn't contact the backend host and
  // switched to the next server. You can put your own reporting logic in here.
  //
});

Binary

$ cat options.json
{
  "hosts": [
    {
      "host": "127.0.0.1",
      "port": 9001
    },
    {
      "host": "127.0.0.1",
      "port": 9002
    }
  ],
  "port": 9000
}
$ failover-proxy options.json
failover-proxy listening on 9000