Round Robin Load Balancing - Go and Laravel Application

This project sets up a Round Robin load balancing system using Docker, Nginx, Go, and Laravel.

Problems Faced & Solutions

1. Go Image Building

• Faced challenges in properly configuring the Go Docker image.
• Solution: Tweaked the Dockerfile to optimize the build process and dependencies.

2. Nginx Configuration for Round Robin

• Faced difficulties in setting up Nginx to distribute requests evenly between Go and Laravel instances.
• Solution: Configured Nginx with appropriate upstream blocks and load balancing settings.

3. Laravel Storage Folder Permission Issues

• Encountered permission issues while trying to write to the Laravel storage folder.

• Solution: Manually granted permissions to the www-data user.

  sudo chown -R www-data:www-data storage/
  sudo chmod -R 775 storage/

Prerequisites

• Docker and Docker Compose installed.
• Basic knowledge of Docker, Nginx, and Laravel.

Setup Instructions

1. Build the Docker Images

Use the following command to build the Docker images:

docker compose -f docker-compose.dev.yml -p dockerproject build

2. Start the Containers

Run the following command to start all the services:

docker compose -f docker-compose.dev.yml -p dockerproject up

3. Access the Application

• Laravel Application: http://localhost
• Go Application: http://localhost:8080

Nginx Configuration (Example)

Below is an example Nginx configuration for Round Robin load balancing:

upstream backend {
    server app1:8000;
    server app2:8000;
}

server {
    listen 80;
    server_name localhost;

    location / {
        proxy_pass http://backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

Useful Commands

• Stop running containers:

  docker compose down

• Check running containers:

  docker ps

• View logs:

  docker compose logs -f

Things to Learn More

• Docker multi-stage builds for Go.
• Advanced Nginx load balancing techniques.
• Automating Laravel permission handling in Docker setup.

Credits

Thanks to Claude.AI for helping solve the challenges faced during setup.

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Happy Coding!!