AWS CDK란 무엇입니까?

export class MyEcsConstructStack extends Stack {
  constructor(scope: App, id: string, props?: StackProps) {
    super(scope, id, props);

    const vpc = new ec2.Vpc(this, "MyVpc", {
      maxAzs: 3 // Default is all AZs in region
    });

    const cluster = new ecs.Cluster(this, "MyCluster", {
      vpc: vpc
    });

    // Create a load-balanced Fargate service and make it public
    new ecs_patterns.ApplicationLoadBalancedFargateService(this, "MyFargateService", {
      cluster: cluster, // Required
      cpu: 512, // Default is 256
      desiredCount: 6, // Default is 1
      taskImageOptions: { image: ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample") },
      memoryLimitMiB: 2048, // Default is 512
      publicLoadBalancer: true // Default is false
    });
  }
}

class MyEcsConstructStack extends Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    const vpc = new ec2.Vpc(this, "MyVpc", {
      maxAzs: 3 // Default is all AZs in region
    });

    const cluster = new ecs.Cluster(this, "MyCluster", {
      vpc: vpc
    });

    // Create a load-balanced Fargate service and make it public
    new ecs_patterns.ApplicationLoadBalancedFargateService(this, "MyFargateService", {
      cluster: cluster, // Required
      cpu: 512, // Default is 256
      desiredCount: 6, // Default is 1
      taskImageOptions: { image: ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample") },
      memoryLimitMiB: 2048, // Default is 512
      publicLoadBalancer: true // Default is false
    });
  }
}

module.exports = { MyEcsConstructStack }

class MyEcsConstructStack(Stack):

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

    vpc = ec2.Vpc(self, "MyVpc", max_azs=3)     # default is all AZs in region

    cluster = ecs.Cluster(self, "MyCluster", vpc=vpc)

    ecs_patterns.ApplicationLoadBalancedFargateService(self, "MyFargateService",
      cluster=cluster,            # Required
      cpu=512,                    # Default is 256
      desired_count=6,            # Default is 1
      task_image_options=ecs_patterns.ApplicationLoadBalancedTaskImageOptions(
          image=ecs.ContainerImage.from_registry("amazon/amazon-ecs-sample")),
      memory_limit_mib=2048,      # Default is 512
      public_load_balancer=True)  # Default is False

public class MyEcsConstructStack extends Stack {

  public MyEcsConstructStack(final Construct scope, final String id) {
    this(scope, id, null);
  }

  public MyEcsConstructStack(final Construct scope, final String id,
      StackProps props) {
    super(scope, id, props);

    Vpc vpc = Vpc.Builder.create(this, "MyVpc").maxAzs(3).build();

    Cluster cluster = Cluster.Builder.create(this, "MyCluster")
            .vpc(vpc).build();

    ApplicationLoadBalancedFargateService.Builder.create(this, "MyFargateService")
            .cluster(cluster)
            .cpu(512)
            .desiredCount(6)
            .taskImageOptions(
                    ApplicationLoadBalancedTaskImageOptions.builder()
                            .image(ContainerImage
                                    .fromRegistry("amazon/amazon-ecs-sample"))
                            .build()).memoryLimitMiB(2048)
            .publicLoadBalancer(true).build();
  }
}

public class MyEcsConstructStack : Stack
{
    public MyEcsConstructStack(Construct scope, string id, IStackProps props=null) : base(scope, id, props)
    {
        var vpc = new Vpc(this, "MyVpc", new VpcProps
        {
            MaxAzs = 3
        });

        var cluster = new Cluster(this, "MyCluster", new ClusterProps
        {
            Vpc = vpc
        });

        new ApplicationLoadBalancedFargateService(this, "MyFargateService",
            new ApplicationLoadBalancedFargateServiceProps
        {
            Cluster = cluster,
            Cpu = 512,
            DesiredCount = 6,
            TaskImageOptions = new ApplicationLoadBalancedTaskImageOptions
            {
                Image = ContainerImage.FromRegistry("amazon/amazon-ecs-sample")
            },
            MemoryLimitMiB = 2048,
            PublicLoadBalancer = true,
        });
    }
}

func NewMyEcsConstructStack(scope constructs.Construct, id string, props *MyEcsConstructStackProps) awscdk.Stack {

	var sprops awscdk.StackProps

	if props != nil {
		sprops = props.StackProps
	}

	stack := awscdk.NewStack(scope, &id, &sprops)

	vpc := awsec2.NewVpc(stack, jsii.String("MyVpc"), &awsec2.VpcProps{
		MaxAzs: jsii.Number(3), // Default is all AZs in region
	})

	cluster := awsecs.NewCluster(stack, jsii.String("MyCluster"), &awsecs.ClusterProps{
		Vpc: vpc,
	})

	awsecspatterns.NewApplicationLoadBalancedFargateService(stack, jsii.String("MyFargateService"),
		&awsecspatterns.ApplicationLoadBalancedFargateServiceProps{
			Cluster:        cluster,           // required
			Cpu:            jsii.Number(512),  // default is 256
			DesiredCount:   jsii.Number(5),    // default is 1
			MemoryLimitMiB: jsii.Number(2048), // Default is 512
			TaskImageOptions: &awsecspatterns.ApplicationLoadBalancedTaskImageOptions{
				Image: awsecs.ContainerImage_FromRegistry(jsii.String("amazon/amazon-ecs-sample"), nil),
			},
			PublicLoadBalancer: jsii.Bool(true), // Default is false
		})

	return stack

}