About This Architecture

Multi-AZ web application architecture with Application Load Balancer distributing traffic across EC2 instances in separate availability zones. Internet users connect via Internet Gateway to an ALB that routes HTTP requests to Ubuntu EC2 web servers in private subnets across us-east-1a and us-east-1b. Web servers access Amazon RDS MySQL through security groups enforcing least-privilege inbound rules, with optional standby replica for disaster recovery. NAT Gateways enable outbound internet connectivity from private app subnets while maintaining security boundaries. Fork this diagram to customize subnets, add read replicas, or implement auto-scaling policies for your production workload.

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

This diagram shows a production-ready architecture spanning two AZs with an Internet-facing ALB routing traffic to EC2 web servers in private subnets, security groups enforcing least-privilege access, NAT Gateways for outbound connectivity, and RDS MySQL with optional standby replica for disaster recovery.