AWS CloudFormation VPC Infrastructure

Overview

Build a VPC foundation with CloudFormation that stays readable, reusable, and safe to evolve. Provides a clear subnet and routing model with predictable connectivity for public and private workloads, plus outputs that downstream stacks can consume without duplicating network logic.

Use the references/ files for larger templates and extended service combinations.

When to Use

• Creating a new VPC stack for an application or shared platform
• Adding public and private subnets across one or more Availability Zones
• Wiring internet access, NAT egress, or private endpoints
• Exporting VPC, subnet, route table, and security-group-adjacent identifiers for other stacks
• Preparing reusable infrastructure for ECS, EKS, Lambda, EC2, or RDS stacks

Instructions

1. Start with the address plan