Golang Load Balancer

A simple application-layer (Layer 7) HTTP load balancer built using Golang. It distributes incoming traffic across multiple backend servers, ensuring efficient load distribution, high availability, and automatic health checks. The project also includes a real-time monitoring dashboard built with React.js & WebSockets, providing live updates on request routing and server health.

🚀 Features

• Round-robin load balancing: Evenly distributes requests among backend servers.
• Health checks: Periodically checks backend servers and removes unhealthy ones.
• WebSocket-based real-time dashboard: Displays:
  • Live server health statuses (🟢 Online / 🔴 Offline).
  • Requests being routed and skipped servers.
• Automatic server recovery detection: Once a failed server comes back online, traffic is routed to it again.
• Play button to start servers: Click on a server to attempt restarting it via the frontend.

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🛠️ Technologies Used

Backend (Load Balancer)

• Golang (HTTP handling, concurrency, WebSockets)
• Gorilla WebSocket (Real-time communication)
• Sync/atomic & Mutexes (Safe concurrent operations)

Frontend (Dashboard)

• React.js (UI framework)
• WebSockets (Live server updates)
• TailwindCSS (Dark-themed, responsive UI)
• React Icons (Server/play button icons)

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📌 Architecture Overview

1. Client makes a request → Load balancer (localhost:8080/) receives it.
2. Load balancer selects the next healthy backend server and forwards the request.
3. Backend server processes the request and returns a response.
4. Load balancer forwards the response back to the client.
5. Frontend (React.js) receives WebSocket updates on:
   • Request routing (which server handled it).
   • Skipped servers (unhealthy).
   • Health status updates.

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