About This Architecture

Multi-AZ enterprise API aggregation architecture using CloudFront, WAF, ALB, and API Gateway to route user traffic across two availability zones in us-east-1. Frontend EC2 instances serve web content while Aggregation API Servers orchestrate calls to CaseDetails and Existing API Services, with all traffic flowing through public subnets via WAF and CloudFront CDN. CloudWatch, X-Ray, and CloudTrail provide comprehensive observability and audit logging to S3, ensuring high availability, security, and operational visibility across the entire stack. Fork this diagram on Diagrams.so to customize subnets, instance types, or add additional backend services. The design demonstrates enterprise-grade API composition with defense-in-depth security and multi-layer tracing for troubleshooting distributed requests.

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How do I design a multi-AZ API aggregation architecture on AWS with high availability and observability?

This diagram shows a production-ready pattern: CloudFront and WAF protect user traffic, ALB distributes across Frontend Web Servers in two AZs, API Gateway routes to Aggregation API Servers that orchestrate calls to CaseDetails and Existing API Services. CloudWatch, X-Ray, and CloudTrail provide end-to-end visibility and audit trails.