AWS CDK:如何在同一应用程序中引用跨栈资源?

时间:2020-05-03 18:38:45

标签: amazon-web-services amazon-cloudformation aws-cdk

我有一个具有两个堆栈的应用程序,它们都位于同一地区/帐户内。这些堆栈中的一个需要另一个堆栈中存在的lambda的ARN。我该如何引用?

// 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?

3 个答案:

答案 0 :(得分:5)

您可以访问不同堆栈中的资源,只要它们位于同一帐户和AWS区域中即可。以下示例定义了堆栈stack1,该堆栈定义了Amazon S3存储桶。然后,它定义第二个堆栈stack2,它将来自stack1的存储桶作为构造函数属性。

// Helper method to build an environment
static Environment makeEnv(String account, String region) {
    return Environment.builder().account(account).region(region)
            .build();
}

App app = new App();

Environment prod = makeEnv("123456789012", "us-east-1");

StackThatProvidesABucket stack1 = new StackThatProvidesABucket(app, "Stack1",
        StackProps.builder().env(prod).build());

// stack2 will take an argument "bucket"
StackThatExpectsABucket stack2 = new StackThatExpectsABucket(app, "Stack,",
        StackProps.builder().env(prod).build(), stack1.getBucket());

答案 1 :(得分:4)

选项1:

使用构造函数将数据从堆栈A传递到堆栈B:

您可以扩展cdk.stack并创建一个包含stackA的新类。

在该堆栈中,使用public XXX: string\number (etc)公开所需的相关数据(请参见示例中的第2行)。

稍后,只需将此数据传递到StackB构造函数中(您也可以使用props传递它)。

工作代码段:

堆栈A:

    export class StackA extends cdk.Stack {
        public YourKey: KEY_TYPE;
    
        constructor(scope: cdk.Construct, id: string, props: cdk.StackProps ) {
            super(scope, id, props);
    
            Code goes here...
    
            // Output the key 
            new cdk.CfnOutput(this, 'KEY', { value: this.YourKey });
    
        }
    }

堆栈B:

export class StackB extends cdk.Stack {
    constructor(scope: cdk.Construct, id: string,importedKey: KEY_TYPE, props: cdk.props) {
        super(scope, id, props)

        Code goes here...
        
        console.log(importedKey)

    }
}

bin ts:

const importedKey = new StackA(app, 'id',props).YourKey;
new StackB(app, 'id',importedKey,props);

选项2:

有时候最好将这种东西保存在参数存储中,然后从那里读取。

更多信息here

答案 2 :(得分:4)

CDK 的官方文档有一个完整的 sharing a S3 bucket between stacks 示例。我把它复制在下面以便更快地参考。

/**
 * 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 });