What is the recommended design for a multi-tier application in VPC?

Question

NAVEEN KUMAR J · Accepted Answer

Internet                        │                        ▼              Application Load Balancer                        │      ┌─────────────────┴─────────────────┐      │                                   │   AZ-A                               AZ-B      │                                   │ ┌─────────┐                        ┌─────────┐ │ Web Tier│                        │ Web Tier│ └─────────┘                        └─────────┘      │                                   │      ▼                                   ▼ ┌─────────┐                        ┌─────────┐ │ App Tier│                        │ App Tier│ └─────────┘                        └─────────┘      │                                   │      └───────────────┬───────────────────┘                      ▼               Database Tier             (RDS Multi-AZ)The recommended design for a multi-tier application in a VPC is a three-tier architecture consisting of a Web Tier in public subnets, an Application Tier in private subnets, and a Database Tier in private database subnets. The application should be deployed across multiple Availability Zones, use an Application Load Balancer, Auto Scaling Groups, Multi-AZ RDS, and NAT Gateways for private subnet internet access. Security Groups should restrict communication so that each tier only talks to the tier immediately above or below it.

What is the recommended design for a multi-tier application in VPC?

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