loadbalancer-stack.ts

#!/usr/bin/env node
import autoscaling = require('@aws-cdk/aws-autoscaling');
import ec2 = require('@aws-cdk/aws-ec2');
import elb = require('@aws-cdk/aws-elasticloadbalancing');
import cdk = require('@aws-cdk/core');

export class LoadBalancerStack extends cdk.Stack {
  constructor(app: cdk.App, id: string) {
    super(app, id);

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

    const asg = new autoscaling.AutoScalingGroup(this, 'ASG', {
      vpc,
      instanceType: ec2.InstanceType.of(ec2.InstanceClass.T2, ec2.InstanceSize.MICRO),
      machineImage: new ec2.AmazonLinuxImage(),
    });

    const lb = new elb.LoadBalancer(this, 'LB', {
      vpc,
      internetFacing: true,
      healthCheck: {
        port: 80
      },
    });

    lb.addTarget(asg);
    const listener = lb.addListener({ externalPort: 80 });

    listener.connections.allowDefaultPortFromAnyIpv4('Open to the world');
  }
}
//
// const app = new cdk.App();
// new LoadBalancerStack(app, 'LoadBalancerStack');
// app.synth();