57 lines
2.7 KiB
Markdown
57 lines
2.7 KiB
Markdown
### Set up a CDK Project - Solution
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### Exercise
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Initialize a CDK project and set up files required to build a CDK project.
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### Solution
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#### Initialize a CDK project
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1. Install CDK on your machine by running `npm install -g aws-cdk`.
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2. Create a new directory named `sample` for your project and run `cdk init app --language typescript` to initialize a CDK project. You can choose language as csharp, fsharp, go, java, javascript, python or typescript.
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3. You would see the following files created in your directory:
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1. `cdk.json`, `tsconfig.json`, `package.json` - These are configuration files that are used to define some global settings for your CDK project.
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2. `bin/sample.ts` - This is the entry point for your CDK project. This file is used to define the stack that you want to create.
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3. `lib/sample-stack.ts` - This is the main file that will contain the code for your CDK project.
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#### Create a Sample lambda function
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1. In `lib/sample-stack.ts` file, add the following code to create a lambda function:
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```typescript
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import * as cdk from 'aws-cdk-lib';
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import * as lambda from 'aws-cdk-lib/aws-lambda';
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import { Construct } from 'constructs';
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export class SampleStack extends cdk.Stack {
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constructor(scope: Construct, id: string, props?: cdk.StackProps) {
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super(scope, id, props);
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const hello = new lambda.Function(this, 'SampleLambda', {
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runtime: lambda.Runtime.NODEJS_14_X,
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code: lambda.Code.fromInline('exports.handler = async () => "hello world";'),
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handler: 'index.handler'
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});
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}
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}
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```
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This will create a sample lambda function that returns "hello world" when invoked.
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#### Bootstrap the CDK project
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Before you deploy your project. You need to bootstrap your project. This will create a CloudFormation stack that will be used to deploy your project. You can bootstrap your project by running `cdk bootstrap`.
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Learn more about bootstrapping [here](https://docs.aws.amazon.com/cdk/latest/guide/bootstrapping.html).
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##### Deploy the Project
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1. Run `npm install` to install all the dependencies for your project whenever you make changes.
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2. Run `cdk synth` to synthesize the CloudFormation template for your project. You will see a new file called `cdk.out/CDKToolkit.template.json` that contains the CloudFormation template for your project.
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3. Run `cdk diff` to see the changes that will be made to your AWS account. You will see a new stack called `SampleStack` that will create a lambda function and all the changes associated with it.
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4. Run `cdk deploy` to deploy your project. You should see a new stack called created in your AWS account under CloudFormation.
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5. Go to Lambda console and you will see a new lambda function called `SampleLambda` created in your account.
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