app.py

from aws_cdk import (
    aws_autoscaling as autoscaling,
    aws_ec2 as ec2,
    aws_ecs as ecs,
    App, Stack
)
from constructs import Construct

class ECSCluster(Stack):

    def __init__(self, scope: Construct, id: str, **kwargs) -> None:
        super().__init__(scope, id, *kwargs)

        vpc = ec2.Vpc(
            self, "MyVpc",
            max_azs=2
        )

        asg = autoscaling.AutoScalingGroup(
            self, "MyFleet",
            instance_type=ec2.InstanceType("t2.xlarge"),
            machine_image=ecs.EcsOptimizedImage.amazon_linux2(),
            associate_public_ip_address=True,
            desired_capacity=3,
            vpc=vpc,
            vpc_subnets=ec2.SubnetSelection(subnet_type=ec2.SubnetType.PUBLIC),
        )

        cluster = ecs.Cluster(
            self, 'EcsCluster',
            vpc=vpc
        )

        capacity_provider = ecs.AsgCapacityProvider(self, "AsgCapacityProvider",
            auto_scaling_group=asg
        )
        cluster.add_asg_capacity_provider(capacity_provider)


app = App()
ECSCluster(app, "MyFirstEcsCluster")
app.synth()