• Define your cloud infrastructure using a familiar language:
  • JavaScript/TypeScript, Python, Java, and .NET
• Contains high level components called constructs
• The code is “compiled” into a CloudFormation template (JSON/YAML)
• You can therefore deploy infrastructure and application runtime code together

CDK vs SAM

CDK

• All AWS services
• Write infra in a programming language JavaScript/TypeScript, Python, Java, and .NET

SAM

• Serverless focused
• Write your template declaratively in JSON or YAML
• Great for quickly getting started with Lambda

Both SAM and CDK use CloudFormation under the hood

CDK Constructus

• CDK Construct is a component that encapsulates everything CDK needs to create the final CloudFormation stack
• Can represent a single AWS resource (e.g., S3 bucket) or multiple related resources (e.g., worker queue with compute)
• AWS Construct Library
  • A collection of Constructs included in AWS CDK which contains Constructs for every AWS resource
  • Contains 3 different levels of Constructs available (L1, L2, L3)
• Construct Hub – contains additional Constructs from AWS, 3rd parties, and open-source CDK community

CDK Constructs – Layer 1 Constructs (L1)

• Can be called CFN Resources which represents all resources directly available in CloudFormation