CloudFormation Stacks and Stack Operations

A CloudFormation stack is a collection of AWS resources that are created, updated, and deleted as a single unit. When you submit a template to CloudFormation, it creates a stack that tracks every resource defined in that template. Understanding how to manage stacks — creating, updating, monitoring, and deleting them — is essential for working with CloudFormation in practice.

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What is a Stack?

A stack is the fundamental deployment unit in CloudFormation. It has:

• A name — a unique identifier within a region and account
• A template — the YAML or JSON file that defines the resources
• A status — indicates whether the stack is being created, updated, or has completed
• A collection of resources — the actual AWS resources managed by the stack
• A history of events — a log of every action CloudFormation has taken

Think of a stack as a single "unit of infrastructure" — all the resources in a stack are meant to work together.

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Stack Statuses

CloudFormation tracks the lifecycle of each stack through a series of statuses: