CloudFormation

AWS CloudFormation is the native Infrastructure as Code (IaC) service: it models, provisions, and manages AWS resources using declarative JSON or YAML templates.

CloudFormation is your core IaC tool for AWS: define your entire cloud environment (e.g., EC2, RDS, VPC) in a declarative JSON or YAML template. The service provisions and manages these resources as a single unit, which we call a stack, ensuring predictable, repeatable deployments across accounts and Regions. It automatically handles resource dependencies, manages the update process via Change Sets, and performs automatic rollbacks on errors, giving you controlled lifecycle management for your infrastructure.

https://aws.amazon.com/cloudformation/