A Load balancer implementation in GO from John Cricket coding challenges

Load balancer implementation in GO

A simple implementation of a load balancer using the round-robin algorithm in GO. Part of my attempt at John Crickett's Coding Challenges.

I wrote a walk-through article on how to build from scratch here

Features

• Round-robin algorithm.
• Development and Production mode.
• Dummy server created when a load balancer is started in dev mode.
• A config.json file to pass in server configuration.
• Loads DB for disk on startup.
• Asynchronous implementation using goroutines.
• Easy to use and extend.

Installation

1. Clone the repository:

   git clone https://github.com/Fuad28/load-balancer.git
   cd load-balancer

2. Install dependencies:

   go get

Usage

1. Edit the config.json file in the root folder:

   • Sample dev config

   {
   	"env": "dev",
   	"port": 8000,
   	"numberOfServers": 3,
   	"randomServerOff": true
   }

   • Sample prod config

   {
   	"env": "prod",
   	"port": 8000,
   	"servers": [
   	    {
   			"address": "https://www.google.com/",
   			"healthCheckPath": "/"
   	    },
   
   		{
   			"address": "https://www.netflix.com/ng/",
   			"healthCheckPath": "/"
   		}
       ]
   }

2. Start the server:

   go run .

3. The server begins to run on localhost port 8000. You can then test by sending a request

    curl http://localhost:8000/   

   You observe that each time, a different server responds.

Basic example

• Server

• Requests