Book Image

Mastering AWS CloudFormation - Second Edition

By : Karen Tovmasyan
Book Image

Mastering AWS CloudFormation - Second Edition

By: Karen Tovmasyan

Overview of this book

The advent of DevOps and the cloud revolution has compelled software engineers and operations teams to rethink how to manage complex infrastructures and build resilient solutions. With this AWS book, you’ll find out how you can use Infrastructure as Code (IaC) to simplify infrastructure operations and manage the modern cloud with AWS CloudFormation. This guide covers AWS CloudFormation comprehensively, from template structures to developing complex and reusable infrastructure stacks. It takes you through template validation, stack deployment, and handling deployment failures. It also demonstrates the use of AWS CodeBuild and CodePipeline for automating resource delivery and implementing continuous integration and continuous delivery (CI/CD) practices. As you advance, you’ll learn how to modularize and unify your template on the fly using macros or by fixating the version using modules. You’ll create resources outside of AWS with custom resources and catalog them with the CloudFormation registry. Finally, you’ll improve the way you manage the modern cloud environment on AWS by extending CloudFormation through the AWS serverless application model (SAM) and the AWS cloud development kit (CDK). By the end of this book, you’ll have mastered key AWS CloudFormation concepts and will be able to extend its capabilities for developing and deploying your own infrastructure.
Table of Contents (19 chapters)
Free Chapter
1
Part 1: CloudFormation Internals
4
Part 2: Provisioning and Deployment at Scale
9
Part 3: Extending CloudFormation

Chapter 3

  1. From 9,000 and above.
  2. Linting is the process of evaluating the template against linter rules and is performed by cfn-lint. Validation is performed by CloudFormation and checks whether the template is valid and can be processed by CloudFormation.
  3. There are several steps:
    1. CloudFormation will check whether the stack exists or not.
    2. CloudFormation will create a ChangeSet for a new or existing stack.
    3. CloudFormation will execute the ChangeSet and listen to the stack events.
    4. If there is a failure, CloudFormation rolls back the changes and informs the user about the issue.
  4. No. ChangeSets must have unique names; otherwise, you will get a 400 AlreadyExists error.
  5. The name of the rule file and the rule class must be the same.
  6. Just add the necessary change to the template or parameters and run the stack update.