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Mastering AWS CloudFormation

Mastering AWS CloudFormation

By : Karen Tovmasyan
4.2 (5)
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Mastering AWS CloudFormation

Mastering AWS CloudFormation

4.2 (5)
By: Karen Tovmasyan

Overview of this book

DevOps and the cloud revolution have forced software engineers and operations teams to rethink how to manage infrastructures. With this AWS book, you'll understand how you can use Infrastructure as Code (IaC) to simplify IT operations and manage the modern cloud infrastructure effectively with AWS CloudFormation. This comprehensive guide will help you explore AWS CloudFormation from template structures through to developing complex and reusable infrastructure stacks. You'll then delve into validating templates, deploying stacks, and handling deployment failures. The book will also show you how to leverage AWS CodeBuild and CodePipeline to automate resource delivery and apply continuous integration and continuous delivery (CI/CD) practices to the stack. As you advance, you'll learn how to generate templates on the fly using macros and create resources outside AWS with custom resources. Finally, you'll improve the way you manage the modern cloud in AWS by extending CloudFormation using AWS serverless application model (SAM) and AWS cloud development kit (CDK). By the end of this book, you'll have mastered all the major AWS CloudFormation concepts and be able to simplify infrastructure management.
Table of Contents (17 chapters)
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1
Section 1: CloudFormation Internals
4
Section 2: Provisioning and Deployment at Scale
9
Section 3: Extending CloudFormation

Writing your own macro

In this section, we are going to develop macros to solve the cases introduced in the first section of this chapter, the Understanding the use cases of template macros section. This will help us to get some hands-on experience and practice partial and full template processing.

Let's start with the AMI ID filler!

AMI ID filler

Let's start with a simple task and create a macro that will automatically find the AMI ID for EC2. By the end of this section, we will have a macro that automatically puts a correct AMI in the resource properties.

As you might remember, our main template will look like the following:

Resources:
  LaunchTemplate:
    Type: "AWS::EC2::LaunchTemplate"
    Properties:
      LaunchTemplateData:
        # This is a replacement for the field ImageId:
       ...

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