About This Architecture

Classic three-tier AWS architecture spanning six subnets across two Availability Zones for high availability. Internet traffic flows through an Application Load Balancer in public subnets, distributing requests to EC2 instances managed by an Auto Scaling Group in private subnets. The data tier features RDS PostgreSQL with synchronous replication to a read replica, while EC2 instances offload static assets to S3. Fork this diagram on Diagrams.so to customize instance types, add CloudFront, or swap RDS for Aurora.

People also ask

How do I design a highly available three-tier web application on AWS?

Deploy an Application Load Balancer in public subnets routing to EC2 instances in private subnets with Auto Scaling. Use RDS PostgreSQL with a read replica in separate data subnets and S3 for static assets.