⚡ Smart Adaptive Load Balancer

Smart Adaptive Load Balancer is a Go-based load balancing system that supports Layer 7 (HTTP) and Layer 4 (TCP) traffic distribution using traditional routing algorithms. It includes health checks, live metrics, and a real-time visualization dashboard to observe routing behavior under load.

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🧰 Built With

• Go (Golang) – core backend & networking
• net/http & TCP sockets – L7/L4 proxies
• HTML, CSS, JavaScript (Canvas API) – live dashboard
• Traditional Algorithms – Round Robin, Least Connections, Random, Weighted Round Robin

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✨ Features

• ✅ L7 HTTP Reverse Proxy

• ✅ L4 TCP Load Balancer

• 🔁 Routing Algorithms

  • Round Robin
  • Least Connections
  • Random

• ❤️ Active Health Checks with auto-failover

• 📊 Metrics API for backend stats

• 🖥️ Live Traffic Visualization Dashboard

• ⚡ Traffic Simulation (animated requests)

• 🛠️ Admin API to dynamically add backends

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🧠 Architecture Overview

Client
  ↓
Smart Load Balancer (L4 / L7)
  ↓
Routing Algorithm
  ↓
Healthy Backend Servers

The system continuously monitors backend health, tracks active connections, and adapts routing decisions in real time.

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🚀 Getting Started

Follow these steps to set up and run the Smart Adaptive Load Balancer on your local machine.

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📦 Prerequisites

Before you begin, ensure you have the following installed:

• Go 1.20+
• Git
• A modern web browser (Chrome / Firefox)

Verify Go installation:

go version

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📥 Cloning the Repository

Open a terminal and run:

git clone https://github.com/sbirmecha99/smart-adaptive-load-balancer.git
cd smart-adaptive-load-balancer

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▶️ Running the Load Balancer

🔹 L7 Mode (Default – HTTP)

go run cmd/balancer/main.go

Expected output:

Starting L7 HTTP Load Balancer on :8080

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🔹 L4 Mode (TCP)

LB_MODE=L4 go run cmd/main.go

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🖥️ Running the Visualization Dashboard

1. Navigate to the dashboard folder:

dashboard/

2. Open index.html and simulation.html in your browser

The dashboard will:

• Fetch live metrics from http://localhost:8080/metrics
• Fetch live status from http://localhost:8080/status
• Display backend health (Alive / Down)
• Animate request routing based on the selected algorithm

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📊 API Endpoints

📈 Metrics Endpoint

GET /metrics

Returns real-time backend metrics:

• Alive status
• Active connections
• Latency
• Error count

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➕ Add Backend Server

POST /admin/add

Dynamically adds a backend server to the pool.

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📁 Project Structure

smart-adaptive-load-balancer/
│
├── cmd/balancer
│   └── main.go
│
├── internal/
│   ├── api/          # Metrics & admin handlers
│   ├── core/         # Backend model
│   ├── health/       # Health checker
│   ├── proxy/
│   │   ├── l4/       # TCP proxy
│   │   └── l7/       # HTTP proxy
│   └── routing/     # Routing algorithms
│
├── dashboard/
│   ├── index.html
│   ├── style.css
│   └── script.js
│
└── README.md