chermehdi / farely

A load balancer supporting multiple LB strategies written in Go

farely

A load balancer supporting multiple LB strategies written in Go.

Goal

The goal of this project is purley educational, I started it as a brainstorming session in twitch.tv, and I ended up having fun to the point that I made it a project.

The balancer's main abstraction is a Service, each service has a name, a balancing strategy, and a group of identical replicas that can serve requests for the same service.

the service is configured via yaml file that is provided at startup, the most recent example can be found in the examples folder.

services: 
  - 
    matcher: /ui
    name: "Web UI"
    replicas: 
      - "http://192.168.23.1:8081"
      - "http://192.168.23.5:8082"
    strategy: RoundRobin
  - 
    matcher: /api/v1
    name: "Stateless API"
    replicas: 
      - "http://192.168.23.1:8081"
      - "http://192.168.23.5:8082"
    strategy: WeightedRoundRobin

Building a demo

If you want to try load balancer, you can run the demo server in the 'cmd/demo/main.go' directory, which starts up a hello world server listening to a specifi port.

Launching the load balancer is as easy as

go run cmd/farely/main.go --config-path /path/to/your/config/file

Or if you have an already built binary

./farely --config-path path/to/your/config

Contributing

Creating issues, and Adding features are always welcome, I leave pointers in the code for myself to remember to add tests / features, feel free to pick them up and address them.

This is a personal project, that is provided for use without any support, and for my own personal enjoyment, feel free to join me live to chat in twitch if you have questions or interested in contributing.

farely's Issues

Add a dynamic resolution configuration

Hosts currently are configured statically, Farely should expose a way of resolving hosts from a Service Discovery service (consul, eureka ...)