AWS CDK Stack with Step functions, lambdas and Dynamo DB

This project demonstrates how to setup a AWS stack with aws-cdk. Inspect the code at infra to see how the various components are defined. Notice we are also able to pass environement variables to the lambda function.

├── infra
│   ├── bin/index.ts   <- Entry point to your stack definitions
│   ├── services       <- Service definitions
│   ├── stacks         <- Stack definitions
│   └── utils
├── src                <- Application code
├── cdk.json           <- Entry point for aws-cdk cli
├── package.json 
└── README.md

Requirements

You need to install aws-cdk globally:

npm i -g aws-cdk

Build and Deploy

It would be easy to integrate this build and deploy process on any CI pipeline.

1. Install the application code: npm i or yarn
2. Install the infra code cd infra and npm i
3. Finally run build & deploy: npm run deploy or yarn deploy

Once deployed you should now have:

• A DynamoDB table called jobs
• 3 Lambda functions (2 With Rest API Integration)
• A Rest API Gateway with 2 methods (GET | POST) on /jobs resource
• A state machine with conditional steps

State machine

Testing out the deployed services

• You can invoke the state machine manually via AWS console to see the step functions in action.
• Or you can invoke a lambda function that triggers the step function tasks via API Gateway POST /jobs.