Scalable Web Application on AWS

Components

? Security & Edge

Edge Layer WAF: Protects against common web exploits (SQL injection, XSS).

Amazon CloudFront: CDN for caching static content globally.

App Layer WAF: Additional layer for app-specific protection.

? Frontend

Application Load Balancer: Distributes traffic to EC2 instances in public subnets.

Amazon EC2 (Frontend): Hosts the web server (e.g., Nginx or Apache).

Auto Scaling Group: Ensures capacity adjusts to traffic demand.

⚙ Backend

Amazon EC2 (Backend): Runs business logic and APIs in private subnets.

Application Load Balancer: Internal ALB to balance traffic between backend EC2 instances.

? Database

Amazon RDS (Primary & Standby): Multi-AZ deployment for fault-tolerant database service.

Private Subnets: Isolated subnets to protect the database layer.

? Monitoring & Notifications

Amazon CloudWatch: Logs, metrics, and alarms.

Amazon SNS: Sends alerts to admins/devs in case of failures or anomalies.