amazon-web-services - AWS CDK : how do I reference cross-stack resources in same app?

Question

我的应用程序有两个堆栈，都位于同一区域/帐户内。其中一个堆栈需要另一个堆栈中存在的 lambda 的 ARN。我如何引用这个？

// within stackA constructor
public StackA(Construct scope, String id, StackProps props) {
    SingletonFunction myLambda = SingletonFunction.Builder.create(this, "myLambda")
        // some code here
        .build()
    CfnOutput myLambdaArn = CfnOutput.Builder.create(this, "myLambdaArn")
        .exportName("myLambdaArn")
        .description("ARN of the lambda that I want to use in StackB")
        .value(myLambda.getFunctionArn())
        .build();
    
}

App app = new App();
Stack stackA = new StackA(app, "stackA", someAProps);    
Stack stackB = new StackB(app, "stackB", someBProps);
stackB.dependsOn(stackA);

如何将 ARN 传递到 StackB 中？

Answer 1

CDK的官方文档有sharing a S3 bucket between stacks的完整示例。我将其复制到下面以便更快地引用。

/**
 * Stack that defines the bucket
 */
class Producer extends cdk.Stack {
  public readonly myBucket: s3.Bucket;

  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const bucket = new s3.Bucket(this, 'MyBucket', {
      removalPolicy: cdk.RemovalPolicy.DESTROY,
    });
    this.myBucket = bucket;
  }
}

interface ConsumerProps extends cdk.StackProps {
  userBucket: s3.IBucket;
}

/**
 * Stack that consumes the bucket
 */
class Consumer extends cdk.Stack {
  constructor(scope: cdk.App, id: string, props: ConsumerProps) {
    super(scope, id, props);

    const user = new iam.User(this, 'MyUser');
    props.userBucket.grantReadWrite(user);
  }
}

const producer = new Producer(app, 'ProducerStack');
new Consumer(app, 'ConsumerStack', { userBucket: producer.myBucket });