index.ts

class HistoryDb extends cdk.Stack {
    vpc: ec2.VpcNetwork;
    db: rds.DatabaseCluster;

    constructor(parent: cdk.App, username: cdk.Token, password: cdk.Token) {
        super(parent, 'HistoryDb');

        this.vpc = new ec2.VpcNetwork(this, 'VPC');

        this.db = new rds.DatabaseCluster(this, 'HistoryDb', {
            defaultDatabaseName: 'HistoryDb',
            masterUser: {
                username: username,
                password: password,
            },
            engine: rds.DatabaseClusterEngine.AuroraPostgresql,
            instanceProps: {
                instanceType: new ec2.InstanceTypePair(ec2.InstanceClass.Burstable2, ec2.InstanceSize.Micro),
                vpc: this.vpc,
                vpcPlacement: {
                    subnetsToUse: SubnetType.Public
                }
            }
        });
    }
}