使用AWS Amplify和CDK创建自定义资源

Question

我正试图使用AWS CDK在AWS Amplify中创建一个自定义资源。而且，我正在尝试使用现有的lambda函数作为提供程序事件处理程序。

当我执行amplify push时，资源创建失败，没有任何有用的信息。我在这里做错了什么？如何解决此问题？

import * as cdk from '@aws-cdk/core';
import * as AmplifyHelpers from '@aws-amplify/cli-extensibility-helper';
import * as cr from "@aws-cdk/custom-resources";
import * as logs from "@aws-cdk/aws-logs";
import * as lambda from '@aws-cdk/aws-lambda';
import { AmplifyDependentResourcesAttributes } from "../../types/amplify-dependent-resources-ref"
export class cdkStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps, amplifyResourceProps?: AmplifyHelpers.AmplifyResourceProps) {
super(scope, id, props);
/* Do not remove - Amplify CLI automatically injects the current deployment environment in this input parameter */
new cdk.CfnParameter(this, 'env', {
type: 'String',
description: 'Current Amplify CLI env name',
});
const dependencies: AmplifyDependentResourcesAttributes = AmplifyHelpers.addResourceDependency(this,
amplifyResourceProps.category,
amplifyResourceProps.resourceName,
[{
category: "function",
resourceName: "myFunction" 
}] 
);

const myFunctionArn = cdk.Fn.ref(dependencies.function.myFunction.Arn);
const importedLambda = lambda.Function.fromFunctionArn(this, "importedLambda", myFunctionArn);

const provider = new cr.Provider(this, "MyCustomResourceProvider", {
onEventHandler: importedLambda,
logRetention: logs.RetentionDays.ONE_DAY,
})
new cdk.CustomResource(this, "MyCustomResource", {
serviceToken: provider.serviceToken
})
}
}

这是我得到的错误：

CREATE_FAILED custommyCustomResourceXXXX AWS:：CloudFormation:：Stack参数：[AssetParametersXXXX，…..]必须有值。

Answer 1

我收到了AWS支持团队的回复。AssetParameters错误似乎是由Amplify CLI当前不支持Amplify CLI中自定义资源类别内的自定义资源提供程序的高级构造引起的。资源应该这样创建：

import * as cdk from '@aws-cdk/core';
import * as AmplifyHelpers from '@aws-amplify/cli-extensibility-helper';
import * as lambda from '@aws-cdk/aws-lambda';
import { AmplifyDependentResourcesAttributes } from "../../types/amplify-dependent-resources-ref"
export class cdkStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps, amplifyResourceProps?: AmplifyHelpers.AmplifyResourceProps) {
super(scope, id, props);
/* Do not remove - Amplify CLI automatically injects the current deployment environment in this input parameter */
new cdk.CfnParameter(this, 'env', {
type: 'String',
description: 'Current Amplify CLI env name',
});
const dependencies: AmplifyDependentResourcesAttributes = AmplifyHelpers.addResourceDependency(this,
amplifyResourceProps.category,
amplifyResourceProps.resourceName,
[{
category: "function",
resourceName: "myFunction" 
}] 
);

const myFunctionArn = cdk.Fn.ref(dependencies.function.myFunction.Arn);
const importedLambda = lambda.Function.fromFunctionArn(this, "importedLambda", myFunctionArn);

new cdk.CustomResource(this, "MyCustomResource", {
serviceToken: importedLambda.functionArn
})
}
}