AWS CloudFormation Explained: Define and Manage Cloud Infrastructure as Code

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AWS CloudFormation is Amazon's infrastructure-as-code service that allows developers to define cloud resources like EC2 instances, S3 buckets, and databases using JSON or YAML templates instead of manual console configuration. When a template is deployed, CloudFormation creates a 'stack' — a managed collection of all specified resources — and automatically handles the correct order of creation and deletion based on dependencies. The service supports 'change sets,' which let users preview modifications before applying updates, reducing the risk of unexpected changes. Infrastructure defined through CloudFormation can be version-controlled in Git, enabling consistent, repeatable deployments across development, staging, and production environments. There is no additional charge for using CloudFormation itself; users pay only for the underlying AWS resources that are provisioned.

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