如何创建CDK NestedStack？

Question

我正在尝试创建一个使用嵌套堆栈的CDK部署：

// app
#!/usr/bin/env node
import 'source-map-support/register';
import cdk = require('@aws-cdk/core');
import { PipelineParentStack } from '../lib/pipeline-stack';

const app = new cdk.App();
const pipelines : string = app.node.tryGetContext("pipelines");
new PipelineParentStack(app, 'PipelineParentStack', {
    pipelines: pipelines
});

pipelines字符串包含一个逗号分隔的列表，我们应该为每个元素创建一个嵌套堆栈。

// nested stacks sit within parent stack
import cdk = require('@aws-cdk/core');
import cfn = require('@aws-cdk/aws-cloudformation');
import {Construct} from "@aws-cdk/core";

interface PipelineParentStackProps extends cdk.StackProps {
  pipelines: string;
}

export class PipelineParentStack extends cdk.Stack {
  constructor(scope: Construct, id: string, props?: PipelineParentStackProps) {
    super(scope, id, props);

    if (props) {
      const pipelinesArray = props.pipelines.split(",");
      for (let pipeline of pipelinesArray) {
        new PipelineStack(scope, pipeline)
      }
    }
  }
}

export class PipelineStack extends cfn.NestedStack {
  constructor(scope: Construct, id: string, props?: cfn.NestedStackProps) {
    super(scope, id, props);

    // The code that defines your stack goes here
  }
}

当我尝试部署父堆栈时，我得到以下错误：

/tmp/pipeline/node_modules/@aws-cdk/aws-cloudformation/lib/nested-stack.ts:227

throw new Error(`Nested stacks must be defined within scope of another non-nested stack`);
^
Error: Nested stacks must be defined within scope of another non-nested stack
at findParentStack (/tmp/pipeline/node_modules/@aws-cdk/aws-cloudformation/lib/nested-stack.ts:227:11)
at new NestedStack (/tmp/pipeline/node_modules/@aws-cdk/aws-cloudformation/lib/nested-stack.ts:87:25)
at new PipelineStack (/src/function/pipeline/lib/pipeline-stack.ts:24:5)
at new PipelineParentStack (/src/function/pipeline/lib/pipeline-stack.ts:16:9)
at Object.<anonymous> (/src/function/pipeline/bin/pipeline.ts:8:1)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)

在我看来，这是按照此处的文档进行配置的：https://github.com/aws/aws-cdk/tree/master/packages/%40aws-cdk/aws-cloudformation

请问我做错了什么？

Answer 1

您需要将嵌套堆栈的scope设置为父堆栈(this，因为它是在父构造函数中定义的)，因此将嵌套堆栈定义更改为：

new PipelineStack(this, pipeline)

Answer 2

您可以参考文档了解nested stack of Cloudformation的用法。

虽然这个特性被标记为稳定，但仍然有block issue可以使用它。不能在嵌套堆栈之间共享VPC声明！

Answer 3

你就不能试试这个吗？如果它不起作用，我很抱歉。我没有试过。只是基于错误，这需要在父栈的范围内。

新建流水线(this，PipelineStack)；