Book Image

AWS CDK in Practice

By : Mark Avdi, Leo Lam
Book Image

AWS CDK in Practice

By: Mark Avdi, Leo Lam

Overview of this book

As cloud applications are becoming more complex, multiple tools and services have emerged to cater to the challenges of running reliable solutions. Although infrastructure as code, containers, and orchestration tools, such as Kubernetes, have proved to be efficient in solving these challenges, AWS CDK represents a paradigm shift in building easily developed, extended, and maintained applications. With AWS CDK in Practice, you’ll start by setting up basic day-to-day infrastructure while understanding the new prospects that CDK offers. You’ll learn how to set up pipelines for building CDK applications on the cloud that are long-lasting, agile, and maintainable. You’ll also gain practical knowledge of container-based and serverless application development. Furthermore, you’ll discover how to leverage AWS CDK to build cloud solutions using code instead of configuration files. Finally, you’ll explore current community best practices for solving production issues when dealing with CDK applications. By the end of this book, you’ll have practical knowledge of CDK, and you’ll be able to leverage the power of AWS with code that is simple to write and maintain using AWS CDK.
Table of Contents (17 chapters)
Part 1: An Introduction to AWS CDK
Part 2: Practical Cloud Development with AWS CDK
Part 3: Serverless Development with AWS CDK
Part 4: Advanced Architectural Concepts

CDK concepts

We have initiated our CDK app, but before we go further, there are a few key CDK concepts that you should understand first. Let’s delve into them one by one.

A CDK app

An AWS CDK app is an application written in a programming language, the most popular being TypeScript (see the language flag when we ran cdk init), which uses the standard CDK library alongside custom-written components to define an AWS-powered infrastructure.

Open up bin/infrastructure.ts. You will see the following line of code:

const app = new cdk.App();

The app constantly acts as the root of our CDK application. The reference to the app will be passed down to all our CDK stacks:

new InfrastructureStack(app, 'InfrastructureStack', {})

CDK stacks

Stacks act as high-level containers for constructs, then are used to define AWS services such as ECS, DynamoDB, and others. Looking at our starter repository so far, we will define only one stack – WebStack. It&...