A clean and simple load balancer
LoadFire is an easy to script load balancer and reverse proxy in NodeJS.
It allows you to write your own pieces of logic as "Patterns" and the core engine takes care of all the proxying logic so you don't have to worry about it.
###This allows for many different use cases, such as:
- Dynamic realtime proxying rules (domain mappings stored in Redis for example). Such things are useful for PaaSs
- Add pieces of middleware to your reverse proxy
- Customizable load balancing patterns (Sticky, RoundRobin, ...)
###It supports proxying:
var http = require'http';var loadfire = require'loadfire';var EDITOR_PORTS = 7001 7002 70037004;var EDITOR_SERVERS = EDITOR_PORTSmapreturnhost: 'localhost'port: x;;// Start all our different http serversportsforEach// Setup HTTP Servervar httpServer = httpcreateServer// Output the port number the server is running onreswriteHead200 'Content-Type': 'text/plain';resendporttoString;;// Listen on assigned porthttpServerlistenport;;// Config for our loadfire servervar CONFIG ='resources':// resource is some value identify this resource// by default it should be the hostname to matchresource: 'localhost:8000'// List of backends to hitbackends: EDITOR_SERVERS// Load balancing pattern// As of now a few are builtin// random, roundrobin, stickypattern: 'roundrobin'// Server to start loadfire onport: 8000;// Start our http serversstartEditorServersEDITOR_PORTS;// Setup our load balancer with the above configvar loadServer = loadfirecreateServerCONFIG;// Now start our load balancerloadServerrun;// Check out localhost:8000// Refresh a few times and you'll see different port numbers appear// depending on which http server the requests are proxied to// since we are using the roundrobin pattern it will cycle through them// Run mainmain;
It was initially built to satisfy our needs at FriendCode, and we've been using it in product for months without any issues, so it can be considered as stable.
The API however will be changed soon due to some design decisions aiming to simplify it's API. (Patterns are quite monolithic as of now, they will be split up into different parts: matcher, mapper, balancer, store).