About This Architecture

Multi-AZ three-tier web architecture spanning us-east-1a and us-east-1b with WAF, CloudFront CDN, and Route 53 routing user traffic through ALB to EC2 and ECS Fargate compute tiers. Application layer connects to RDS Primary/Standby, DynamoDB, ElastiCache, and S3 via private subnets across both availability zones. CloudWatch and CloudTrail provide observability and compliance logging, while IAM and Secrets Manager enforce security controls across the VPC (10.0.0.0/16). This architecture demonstrates AWS best practices for fault tolerance, auto-scaling, and defense-in-depth security. Fork and customize this diagram on Diagrams.so to match your region, instance types, or add additional services like SNS or SQS.

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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, ALB for load balancing, and ECS Fargate or EC2 for compute. The data tier spans RDS Primary/Standby for relational data, DynamoDB for NoSQL, and ElastiCache for caching, all distributed across us-east-1a and us-east-1b for fault tolerance.