About This Architecture

Three-tier AWS architecture featuring an Application Load Balancer distributing traffic across an Auto Scaling Group of t3.medium EC2 instances. The compute tier spans Public and Private Subnets within a VPC, connecting to RDS PostgreSQL with Primary and Read Replica in dedicated Database Subnets for high availability. Static assets flow from S3 Bucket through CloudFront CDN directly to Users, offloading origin traffic and reducing latency. This pattern demonstrates AWS best practices for fault-tolerant, cost-efficient web applications with read scaling. Fork this diagram on Diagrams.so to customize instance types, add caching layers, or adapt for your workload.

People also ask

How do I design a scalable three-tier web application on AWS with auto scaling and database read replicas?

Deploy an Application Load Balancer routing to an Auto Scaling Group of EC2 instances across private subnets. Use RDS PostgreSQL with a read replica for database scaling, and serve static assets via S3 and CloudFront CDN. This diagram on Diagrams.so illustrates the complete pattern.