Cloud Intermediate

AWS CDK — Cloud Development Kit¶

AWSCDKIaCTypeScript 5 min read

CDK constructs L1/L2/L3, stacks, aspects a testing.

Construct Levels¶

const bucket = new s3.Bucket(this, 'Images', {
  versioned: true,
  encryption: s3.BucketEncryption.S3_MANAGED,
  lifecycleRules: [{
    transitions: [{storageClass: s3.StorageClass.GLACIER, transitionAfter: cdk.Duration.days(90)}]
  }]
});
const fn = new lambda.Function(this, 'Processor', {
  runtime: lambda.Runtime.NODEJS_20_X,
  handler: 'index.handler',
  code: lambda.Code.fromAsset('lambda'),
});
bucket.grantRead(fn); // L2 magic — auto-generates IAM policy

Aspects¶

class TagChecker implements cdk.IAspect {
  visit(node) {
    if (cdk.TagManager.isTaggable(node)) {
      // enforce required tags
    }
  }
}
cdk.Aspects.of(app).add(new TagChecker());

Testing¶

const template = Template.fromStack(stack);
template.hasResourceProperties('AWS::S3::Bucket', {
  VersioningConfiguration: { Status: 'Enabled' }
});

Summary¶

CDK = nejlepší volba pro AWS-only týmy. L2/L3 constructs drasticky snižují boilerplate.

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