CDK Basics: AWS Serverless

The AWS Cloud Development Kit (CDK) is an open-source software development framework to define cloud infrastructure using a programming language. CDK allows developers to use familiar programming languages to define cloud resources and deploy them using AWS CloudFormation.

Key Benefits:

• Familiar programming constructs
• Reusable components
• Strongly typed constructs

To get started with AWS CDK, ensure you have Node.js installed, then install the CDK globally:

npm install -g aws-cdk

Verify the installation:

cdk --version

To create your first CDK application, follow these steps:

1. Initialize a new CDK project:

cdk init app --language=typescript

2. Install required AWS libraries, for example, for Lambda:

npm install @aws-cdk/aws-lambda

3. Define your stack in lib/.ts:

import * as cdk from 'aws-cdk-lib';
import * as lambda from 'aws-cdk-lib/aws-lambda';

export class MyStack extends cdk.Stack {
  constructor(scope: cdk.App, id: string) {
    super(scope, id);

    new lambda.Function(this, 'MyFunction', {
      runtime: lambda.Runtime.NODEJS_14_X,
      handler: 'index.handler',
      code: lambda.Code.fromAsset('lambda'),
    });
  }
}

4. Deploy your stack:

cdk deploy

Follow these best practices for effective CDK usage:

• Use constructs to encapsulate functionality.
• Keep your stacks small and focused.
• Utilize version control for your CDK code.
• Test your CDK applications locally when possible.