The AWS Cloud Development Kit (AWS CDK) is a new framework for creating infrastructure as code with programming languages including TypeScript, Java, and Python. The CDK models cloud resources as constructs. Low-level constructs describe individual resources like an Amazon (S3) bucket. The high-level constructs are composed of low-level constructs, configurations, and application logic; for instance, an Amazon S3 bucket for serving static web assets with a Amazon CloudFront distribution and strong security settings. The CDK deploys your resources using AWS CloudFormation. The CDK includes a set of opinionated constructs that follow AWS Well Architected best practices. You can create custom constructs that meet your organization's needs and distribute them with language native package management tools too.

1. P U B L I C S E C T O R
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Washington, DC

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Introduction to the AWS Cloud
Development Kit (CDK): Opinionated
Infrastructure as Code
Ryan Malecky
Sr Solutions Architect
Amazon Web Services
3 0 9 2 6 5

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Manual
� Easy to get started
� Not reproducible
� Error prone
� Time consuming Manual
High
level
Low
level

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Scripted
� What happens if an API call fails?
� How do I make updates?
� How do I know a resource is ready?
� How do I roll back?
Scripted
Manual
High
level
Low
level

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Resource provisioning engines
AWS CloudFormation
template
(JSON/YAML)
Desired state configuration
Declarative
Scripted
Manual
High
level
Low
level
� Easy to automate
� Reproducible
� Configuration syntax
� No abstraction, lots of details

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Document Object Models (DOMs)
Troposphere Python
SparkleFormation Ruby
GoFormation Go
…
if statements, for loops, IDE
benefits
Ex: 218 lines of Troposphere for a
VPC
AWS
CloudFormati
on Template
� Real code ♥️
� Desired state
� Abstraction is not built-in
DOMs
Declarative
Scripted
Manual
High
level
Low
level

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Developer
preview
AWS
CloudFormation
template
AWS CDK application
Stack(s)
Construct Construct
AWS CDK
Componentize
d
DOMs
Declarative
Scripted
Manual
High
level
Low
level
Resources

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AWS Construct
Library
AWS CDK Developer
preview
Componentize
d
DOMs
Declarative
Scripted
Manual
High
level
Low
level

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AWS Cloud Development Kit (CDK)
Open source framework to define cloud infrastructure in popular
programming languages
‘By compiling our source module using jsii, we can now package it as modules in one of the supported target
languages.’
JSII (JavaScript Interoperability Interface)

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AWS Cloud Development Kit (CDK)
Provides library of higher-level resource types (“construct” classes) that
have AWS best practices built in by default
 Think constructs as cloud components
 Constructs can represent architectures of any complexity

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AWS Cloud Development Kit (CDK)
Provisions resources with AWS CloudFormation
 Synthesize and print the CloudFormation template
 Deploy CloudFormation stacks directly
Supports all AWS CloudFormation resource types
 Create low-level resources from CloudFormation Resource Specification on a
regular basis
 Cfnxyz classes matches 1:1 with resources in CloudFormation (L1 Constructs)
 Provide high level abstraction via the AWS construct library

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AWS construct library (L2 constructs)
• AWS Lambda
• Amazon API Gateway
• AWS DynamoDB
• AWS Step Functions
• Amazon CloudWatch
• Metrics, alarms, dashboards
• AWS CodePipeline
• AWS Auto Scaling
• Amazon Elastic Cloud Compute (Amazon EC2)
• VPCs, security groups, Auto Scaling
• ……

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CDK workflow
cdk bootstrap - Deploys the CDK toolkit stack into an AWS environment
cdk init - Create a new CDK project
Add the constructs your code needs
e.g. npm install @aws-cdk/aws-lambda @aws-cdk/aws-apigateway
Compile your code if needed
e.g. npm run build
cdk synth - Synthesizes and prints the CloudFormation template for the stack
cdk deploy - Deploys the stack(s) into your AWS account
cdk destroy - Destroy the stack(s)

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Demos
1. Workflow
2. Building an Application
3. Building a Construct

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Next steps
• Try out the CDK
• https://cdkworkshop.com
• https://docs.aws.amazon.com/cdk/api/latest/
• https://github.com/eladb/awesome-cdk
• Engage with the community
• https://github.com/awslabs/aws-cdk
• https://gitter.im/awslabs/aws-cdk

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19. Thank you!
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Ryan Malecky
rmalecky@amazon.com