About This Architecture

Multi-AZ three-tier architecture spanning two AWS availability zones with Route 53 DNS, CloudFront CDN, WAF, and Shield protecting dual Application Load Balancers. Application tier runs EC2 t3.medium and ECS Fargate across both AZs with Auto Scaling, while data tier features RDS Multi-AZ with primary-standby replication, ElastiCache clusters, and DynamoDB for NoSQL workloads. This design eliminates single points of failure, ensures automatic failover, and demonstrates AWS best practices for fault tolerance, scalability, and security. Fork and customize this diagram on Diagrams.so to match your specific instance types, subnet ranges, or regional requirements. The architecture leverages managed services like Secrets Manager and CloudWatch for operational excellence and compliance.

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How do I design a highly available three-tier AWS application across multiple availability zones with automatic failover?

This diagram shows a production-grade multi-AZ architecture using Route 53 for DNS failover, CloudFront and WAF for edge protection, dual Application Load Balancers across AZ-1 and AZ-2, and RDS Multi-AZ with primary-standby replication for zero-downtime database failover. ECS Fargate and EC2 instances with Auto Scaling ensure application tier resilience, while ElastiCache and DynamoDB provide dis