About This Architecture

Multi-AZ three-tier web architecture spanning us-east-1a and us-east-1b with Route 53 DNS, CloudFront CDN, WAF, and Application Load Balancers distributing traffic across presentation, application, and data tiers. EC2 t3.medium, ECS Fargate, and Lambda compute options connect to RDS Primary/Standby databases and DynamoDB Global Tables for resilience. CloudWatch monitors compute instances, IAM secures Lambda execution, and Secrets Manager protects RDS credentials while S3 provides durable object storage. This architecture demonstrates AWS best practices for fault tolerance, auto-scaling, and multi-region readiness across isolated subnets. Fork and customize this diagram on Diagrams.so to match your VPC CIDR blocks, instance types, and failover requirements. Consider adding Auto Scaling Groups and Network ACLs for production deployments requiring granular traffic control.

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How do I design a highly available three-tier web application on AWS across multiple availability zones?

This diagram shows a production-ready multi-AZ architecture using Route 53 for DNS, CloudFront CDN with WAF for edge protection, Application Load Balancers in each AZ, and a mixed compute strategy with EC2, ECS Fargate, and Lambda. RDS Primary/Standby and DynamoDB Global Tables ensure data resilience, while CloudWatch, IAM, and Secrets Manager provide observability and security.