CDK

// CDK TypeScript - ECS Fargate 서비스 배포
import * as cdk from 'aws-cdk-lib';
import * as ec2 from 'aws-cdk-lib/aws-ec2';
import * as ecs from 'aws-cdk-lib/aws-ecs';
import * as ecsPatterns from 'aws-cdk-lib/aws-ecs-patterns';

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

    // VPC 생성 (NAT Gateway 포함)
    const vpc = new ec2.Vpc(this, 'MyVpc', {
      maxAzs: 2,
      natGateways: 1,
    });

    // ECS 클러스터 생성
    const cluster = new ecs.Cluster(this, 'MyCluster', {
      vpc,
      containerInsights: true,
    });

    // ALB + Fargate 서비스 (L3 Construct)
    const service = new ecsPatterns.ApplicationLoadBalancedFargateService(
      this, 'MyService', {
        cluster,
        cpu: 256,
        memoryLimitMiB: 512,
        desiredCount: 2,
        taskImageOptions: {
          image: ecs.ContainerImage.fromRegistry('nginx:latest'),
          containerPort: 80,
        },
        publicLoadBalancer: true,
      }
    );

    // Auto Scaling 설정
    const scaling = service.service.autoScaleTaskCount({
      minCapacity: 2,
      maxCapacity: 10,
    });
    scaling.scaleOnCpuUtilization('CpuScaling', {
      targetUtilizationPercent: 70,
    });

    // ALB DNS 출력
    new cdk.CfnOutput(this, 'LoadBalancerDNS', {
      value: service.loadBalancer.loadBalancerDnsName,
    });
  }
}

# CDK Python - Lambda + API Gateway
from aws_cdk import (
    Stack,
    aws_lambda as lambda_,
    aws_apigateway as apigw,
    aws_dynamodb as dynamodb,
    Duration,
    RemovalPolicy,
)
from constructs import Construct

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

        # DynamoDB 테이블
        table = dynamodb.Table(
            self, "ItemsTable",
            partition_key=dynamodb.Attribute(
                name="id",
                type=dynamodb.AttributeType.STRING
            ),
            billing_mode=dynamodb.BillingMode.PAY_PER_REQUEST,
            removal_policy=RemovalPolicy.DESTROY,
        )

        # Lambda 함수
        handler = lambda_.Function(
            self, "ItemsHandler",
            runtime=lambda_.Runtime.PYTHON_3_11,
            code=lambda_.Code.from_asset("lambda"),
            handler="index.handler",
            timeout=Duration.seconds(30),
            environment={
                "TABLE_NAME": table.table_name,
            }
        )

        # Lambda에 DynamoDB 권한 부여
        table.grant_read_write_data(handler)

        # API Gateway
        api = apigw.RestApi(
            self, "ItemsApi",
            rest_api_name="Items Service",
            deploy_options=apigw.StageOptions(stage_name="prod"),
        )

        items = api.root.add_resource("items")
        items.add_method("GET", apigw.LambdaIntegration(handler))
        items.add_method("POST", apigw.LambdaIntegration(handler))

# CDK CLI 명령어 모음

# CDK 설치 (전역)
npm install -g aws-cdk

# 새 CDK 프로젝트 초기화
cdk init app --language typescript

# CDK Bootstrap (계정당 1회)
cdk bootstrap aws://123456789012/ap-northeast-2

# CloudFormation 템플릿 생성 (미리보기)
cdk synth

# 변경사항 확인 (diff)
cdk diff

# 스택 배포
cdk deploy

# 여러 스택 동시 배포
cdk deploy --all

# 특정 스택 배포 (승인 없이)
cdk deploy MyStack --require-approval never

# 스택 삭제
cdk destroy

# Context 값 설정
cdk deploy -c environment=production

# 핫스왑 배포 (Lambda, ECS 등 빠른 배포)
cdk deploy --hotswap

# Watch 모드 (파일 변경 시 자동 배포)
cdk watch