Demostration on using aws-cdk for Load-Balanced Fargate Service with RDS Database

This is a demo project for showcasing how to use aws-cdk to deploy a classic 3-tier web service with load-balancers, docker containers runnning application codes, and a relational database for persistant data.

We use AWS Elastic Load-balancer, AWS ECS Fargate for running Docker containers, and RDS Aurora for relational database.

Tier	Componenet	AWS Service
1	Load-balancer	AWS ELB
2	Application Logic	AWS ECS Fargate
3	Database	AWS RDS Aurora

This projects uses a simple express app with database connection for the application logic. You may need to replace the container image billykong/express-database-checker with your own Docker image if you want to reuse the template.

The cdk.json file tells the CDK Toolkit how to execute your app.

Install AWS-CDK

npm install -g aws-cdk

Useful commands

• npm run build compile typescript to js
• npm run watch watch for changes and compile
• npm run test perform the jest unit tests
• cdk deploy deploy this stack to your default AWS account/region
• cdk diff compare deployed stack with current state
• cdk synth emits the synthesized CloudFormation template

Notes

• We should install the same version of aws-cdk and other @aws-cdk/* dependencies. It seems even minor version difference may be incompatible.
• This project uses v1.38.0 for @aws-cdk/* and tested with aws-cdk@1.38.0.