This project implements a simple round-robin load balancer in Go. The load balancer uses a configuration file (config.yml) to determine which backend servers to distribute incoming HTTP requests among.

• Round-Robin Strategy: Distributes incoming requests evenly across all available backend servers.
• Configuration-Based: Backend servers are configured through a config.yml file.

Ensure you have Go installed on your machine. You can download it from the official Go website.

1. Clone the repository to your local machine.

   git clone https://github.com/Vandit1604/go-lb.git
   cd go-lb 

2. Install dependencies.

   go mod tidy

3. Configure the load balancer by editing config.yml to include your backend servers' URLs.

Run the following command to build the load balancer executable.

make build

This command compiles the Go code into a binary named go-lb located in the bin directory.

Start the load balancer by executing the built binary.

./bin/go-lb

The load balancer listens on port 9000 by default. You can change the port by modifying the port field in the config.yml file.

1. Start the python testing-servers with following commands in indiviual terminals

python3 -m http.server 8080 --directory testing-servers/server8080
python3 -m http.server 8081 --directory testing-servers/server8081
python3 -m http.server 8082 --directory testing-servers/server8082

2. Visit http://localhost:9000

3. Do hard refresh with CTRL+SHIFT+R and you'll be able to see the port changing in HTML.

NOTE: Use this command to kill all the python servers after you're done testing

pkill -f "python3 -m http.server"

The load balancer's behavior is determined by the config.yml file. This file specifies the backend servers the load balancer should distribute requests to. Here's an example configuration:

port: 3332
strategy: round-robin 
backends:
  - "http://localhost:8080"
  - "http://localhost:8081"
  - "http://localhost:8082"

Each entry in the backends list represents a backend server the load balancer can forward requests to.

Contributions are welcome! Please feel free to submit pull requests or open issues for bugs and enhancements.