Question

我正在尝试在CloudFormation模板中学习CustomResources的工作。创建简单模板以创建s3存储桶。但是在创建堆栈时，它会长时间保持在“正在进行中”状态，并且不会创建任何存储桶。有什么，我在以下经过验证的模板中遗漏了：

  {
   "AWSTemplateFormatVersion" : "2010-09-09",
   "Description" : "Building A bucket With customeResources in CloudFormation",
   "Parameters" : {
        "NewBucket": {
            "Default": "",
            "Description": "S3 bucket containing customer assets",
            "Type": "String"
    }
   },

    "Conditions": {
        "NewBucket": {
            "Fn::Not": [
                {
                    "Fn::Equals": [
                        {
                            "Ref": "NewBucket"
                        },
                        ""
                    ]
                }
            ]
        }
    },

  "Resources" : {

    "CustomResource": {

        "Properties": {
            "S3Bucket": {
                    "Ref": "NewBucket"
                },
            "ServiceToken": "SNS topic ARN"    
            },
        "Type": "AWS::CloudFormation::CustomResource"
        }
  },
  "Outputs": {
    "BucketName": {
        "Value": {
            "Fn::GetAtt": [ "CustomResource", {"Ref": "NewBucket"} ]
        }
    }
}
}

Answer 1

看来你的SNS支持的自定义资源没有将响应发送回云端，并且等待响应的时间一直存在。

来自Amazon Simple Notification Service-backed Custom Resources：

自定义资源提供程序处理模板发送的数据开发人员并确定Create请求是否成功。然后，资源提供程序使用AWS CloudFormation发送的S3 URL 发送SUCCESS或FAILED的回复。

当向SNS服务提供商发出请求时，它包含以下对象：

{
  "RequestType": "Create",
  "ServiceToken": "arn:aws:sns:us-west-2:2342342342:Critical-Alerts-development",
  "ResponseURL": "https:\/\/cloudformation-custom-resource-response-uswest2.s3-us-west-2.amazonaws.com\/arn%3Aaws%3Acloudformation%3Aus-west-2%3A497903502641%3Astack\/custom-resource\/6bf07a80-d44a-11e7-84df-503aca41a029%7CCustomResource%7C5a695f41-61d7-475b-9110-cdbaec04ee55?AWSAccessKeyId=AKIAI4KYMPPRGIACET5Q&Expires=1511887381&Signature=WmHQVqIDCBwQSfcBMpzTfiWHz9I%3D",
  "StackId": "arn:aws:cloudformation:us-west-2:asdasdasd:stack\/custom-resource\/6bf07a80-d44a-11e7-84df-503aca41a029",
  "RequestId": "5a695f41-61d7-475b-9110-cdbaec04ee55",
  "LogicalResourceId": "CustomResource",
  "ResourceType": "AWS::CloudFormation::CustomResource",
  "ResourceProperties": {
    "ServiceToken": "arn:aws:sns:us-west-2:234234234:Critical-Alerts-development",
    "S3Bucket": "test-example-com"
  }
}

您需要向Cloud Formation事件中提供的ResponseURL发送成功/失败响应以继续处理。

我还要注意，除非您的自定义服务提供商创建了该存储桶，否则不会创建该存储桶。自定义资源功能仅将请求发送给提供者。

使用CloudFormation和SNS支持的CustomResources挂起堆栈

1 个答案: