Introduction

In this lesson, we will learn how to deploy a Lambda function with AWS CDK and Typescript. We will cover the basics of AWS CDK, how to set up a Typescript project, and how to deploy a Lambda function with AWS CDK and Typescript. By the end of this lesson, you will have a better understanding of how to use AWS CDK and Typescript to deploy a Lambda function.

What is AWS CDK?

AWS CDK (Cloud Development Kit) is an open-source software development framework for defining cloud infrastructure as code. It allows developers to define their cloud infrastructure using familiar programming languages such as Typescript, Python, Java, and C#. AWS CDK provides a set of high-level abstractions that make it easier to define and deploy cloud infrastructure.

Setting up a Typescript Project

Before we can deploy a Lambda function with AWS CDK and Typescript, we need to set up a Typescript project. To do this, we will use the Node Package Manager (NPM). NPM is a package manager for JavaScript and is used to install, manage, and publish packages.

First, we need to create a directory for our project. We can do this with the following command:

mkDIR my-project

Next, we need to navigate to the directory and initialize the project with NPM. We can do this with the following command:

cd my-project
npm init

This will create a package.json file in the directory. This file contains information about the project, such as the name, version, and dependencies.

Now, we need to install the AWS CDK and Typescript packages. We can do this with the following command:

npm install --save-dev @aws-cdk/core @aws-cdk/aws-lambda typescript

This will install the AWS CDK and Typescript packages in the project directory.

Deploying a Lambda Function with AWS CDK and Typescript

Now that we have set up our project, we can deploy a Lambda function with AWS CDK and Typescript. To do this, we need to create a file called index.ts. This file will contain the code for our Lambda function.

First, we need to import the necessary packages. We can do this with the following code:

import * as cdk from '@aws-cdk/core';
import * as lambda from '@aws-cdk/aws-lambda';

Next, we need to create a new stack. A stack is a collection of AWS resources that are created and managed together. We can do this with the following code:

const stack = new cdk.Stack();

Now, we need to create a new Lambda function. We can do this with the following code:

const myLambda = new lambda.Function(stack, 'MyLambda', {
  runtime: lambda.Runtime.NODEJS_12_X,
  code: lambda.Code.fromAsset('lambda'),
  handler: 'index.handler'
});

This will create a new Lambda function called MyLambda. The runtime is set to Node.js 12.x, the code is set to the lambda directory, and the handler is set to index.handler.

Finally, we need to deploy the stack. We can do this with the following command:

cdk deploy

This will deploy the stack to AWS.

Conclusion

In this lesson, we learned how to deploy a Lambda function with AWS CDK and Typescript. We covered the basics of AWS CDK, how to set up a Typescript project, and how to deploy a Lambda function with AWS CDK and Typescript. By the end of this lesson, you should have a better understanding of how to use AWS CDK and Typescript to deploy a Lambda function.