Hacktoberfest 2024

Ccontributions from all levels of experience are welcome! To contribute:

• Fork the repository
• Make your changes
• Open a pull request (PR)

Be sure to read the contribution guidelines and code of conduct before submitting your PR.

Simple Go Load Balancer

This project demonstrates a basic load balancer implemented in Go. It only uses the standard http library.

It uses Docker and Docker Compose to spin up multiple backend HTTP servers and a load balancer that distributes incoming requests among these backends in round-robin fashion.

Features

• Round-Robin Load Balancing: Distributes incoming requests evenly across backend servers.
• Health Check: Detects and excludes unhealthy backend servers from the pool.
• Retry Mechanism: Retries failed requests with different backend servers.
• Dockerized: Easy to deploy and manage using Docker and Docker Compose.

Getting Started

Prerequisites

• Docker
• Docker Compose
• Go (if you want to run the code locally)

Running the Load Balancer

1. Build and start the containers:

   docker compose up --build

2. Test the Load Balancer:

   curl http://localhost:8080

   You should see responses from different backend servers (e.g. Hello from backend running on port 80)

3. Configuring health check Set enviornment variable: export HEALTH_CHECK_INTERVAL=60 (macOS/Linux), set HEALTH_CHECK_INTERVAL=60 (Windows Command Prompt)

Inspired by build-your-own-x repo