AWS Three-Tier Web App - Multi-AZ with RDS Replica
About This Architecture
Multi-AZ three-tier web app with Route 53 DNS, CloudFront CDN, WAF, and dual ALBs routing to Auto Scaling EC2 instances across two availability zones. Application tier EC2 instances connect to RDS PostgreSQL primary and read replica for database resilience, with ElastiCache for session and query caching. CloudWatch monitors compute and database metrics, while CloudTrail audits API calls, Shield protects against DDoS, and Secrets Manager secures database credentials. Fork this diagram to customize instance types, subnet ranges, or add additional regions for global failover.
People also ask
How do I design a highly available three-tier web application on AWS with multi-AZ failover and database read replicas?
This diagram shows a production-grade AWS architecture using Route 53 for DNS, CloudFront CDN with WAF for content delivery and protection, dual Application Load Balancers across two availability zones, Auto Scaling EC2 instances in private subnets, RDS PostgreSQL primary-replica replication for database resilience, and ElastiCache for distributed caching. CloudWatch and CloudTrail provide observa
- Domain:
- Cloud Aws
- Audience:
- AWS solutions architects designing highly available multi-tier web applications
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