# Create VPC, EC2 ASG, and RDS instance with AWS CDK Python

This is a project to create a new VPC, EC2 Auto Scaling group, and RDS instance on AWS with the AWS Cloud Development Kit.

This project also demonstrates:
* Create VPC in 3 tier layers of subnets: PUBLIC, PRIVATE and ISOLATED, you can specify the number of AZs and the CIDR.
* Create Bastion instance, NAT Gateway, and S3 endpoint
* Create ALB, EC2 Autoscaling group with scaling policy, and custom EBS volume
* Create RDS instance (MySQL multi-AZ or Aurora)
* Create security group and allow access from the other security group: Internet -> ALB -> EC2ASG -> RDS
* Using customized EC2 user data and specifying generated AMI properties with no need to specify the AMI id in every region

## Architeture
![Architecture](./img_demo_cdk_vpc.png)

This project creates the new VPC part of the architecture. For the existing VPC part, please refer to the project in aws-cdk-examples/existing-vpc-new-ec2-ebs-userdata.

## Useful commands

 * `cdk ls`          list all stacks in the app
 * `cdk synth`       emits the synthesized CloudFormation template
 * `cdk deploy`      deploy this stack to your default AWS account/region
 * `cdk diff`        compare deployed stack with current state
 * `cdk docs`        open CDK documentation