Cloud-Native Scalable Web Application

A production-style cloud application built using Flask, Docker, and AWS services including EC2, Application Load Balancer (ALB), Auto Scaling, and CloudWatch.

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🧠 Architecture Overview

Flow:
User → ALB → Auto Scaling Group (EC2 Instances) → Docker → Flask App

• Load Balancer distributes incoming traffic
• Auto Scaling dynamically launches/terminates EC2 instances
• Docker ensures consistent deployment
• CloudWatch monitors system performance

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⚙️ Tech Stack

• Python (Flask)
• Docker
• AWS EC2
• AWS Application Load Balancer (ALB)
• AWS Auto Scaling Group (ASG)
• AWS CloudWatch

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Features

• ✅ Containerized Flask application
• ✅ Load-balanced traffic distribution
• ✅ Auto Scaling for high availability
• ✅ Multi-AZ deployment
• ✅ Real-time monitoring with CloudWatch

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🌐 Live Demo

👉 http://flask-alb-1121615369.ap-south-1.elb.amazonaws.com/

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CloudWatch Metrics (Proof of Performance)

1️⃣ Request Count (Traffic Monitoring)

• Shows number of incoming requests handled by ALB

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2️⃣ Target Response Time (~0.1s)

• Demonstrates low-latency response under load

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3️⃣ Target Group Health

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4️⃣ EC2 Output

• Displays Output EC2 DNS

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5️⃣ Docker Connection

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📸 Architecture Diagram

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Setup Instructions

1. Clone Repository

git clone https://github.com/shripatil70/cloud-native-webapp.git
cd cloud-native-webapp

2. Build Docker Image

docker build -t flask-app .

3. Run Container

docker run -p 5000:5000 flask-app

4. Access Locally

http://localhost:5000

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AWS Deployment Steps (Summary)

• Launch EC2 instance
• Install Docker & Git
• Clone repo and run container
• Create Application Load Balancer
• Create Target Group
• Configure Auto Scaling Group
• Attach ALB to ASG
• Monitor using CloudWatch

Key Achievements

• ⚡ Achieved ~0.1s response time using ALB routing
• 🔄 Enabled automatic scaling based on demand
• 🟢 Maintained high availability using multi-instance architecture
• 📊 Implemented real-time monitoring using CloudWatch

Future Improvements

• Add CI/CD using AWS CodePipeline
• Add HTTPS (SSL via ACM)
• Integrate custom domain (Route 53)
• Push Docker image to Docker Hub

Author

Dhanashri Patil