About This Architecture

Multi-AZ three-tier web architecture spanning two AWS availability zones with CloudFront CDN, WAF, and Application Load Balancer routing traffic to compute resources. EC2 t3.medium and ECS Fargate instances in private subnets connect to RDS Primary/Standby databases, DynamoDB Global Tables, and ElastiCache clusters for caching and session management. CloudWatch monitors all compute layers while IAM enforces least-privilege access across the VPC, S3 object storage, and managed services. Fork this diagram to customize instance types, subnet CIDR blocks, or add additional AZs for your production workload. The architecture demonstrates AWS best practices for fault tolerance, auto-scaling readiness, and separation of concerns across presentation, application, and data tiers.

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How do I design a highly available AWS web application across multiple availability zones with database failover and caching?

This diagram shows a production-grade multi-AZ architecture where CloudFront and WAF protect traffic routed through an ALB to EC2 and ECS Fargate instances in private subnets across two AZs. RDS Primary/Standby, DynamoDB Global Tables, and ElastiCache replicas ensure data durability and low-latency reads, while CloudWatch and IAM provide observability and security.