aws-cloudformation - Cloudformation SNS 模板验证错误

Question

我正在尝试创建 sns 订阅，但收到模板验证错误。

“MySNSTopic”是名为testsnstopic 的cloudformation 堆栈的逻辑ID。

这是正确的吗？谁能解释一下我应该在这里为“Ref”赋予什么值

"TopicArn" : {
        "Ref": "MySNSTopic"
        }

模板验证错误:

Template format error: Unresolved resource dependencies [MySNSTopic] in the Resources block of the template

代码:

{
"Resources": {
"MySubscription" : {
  "Type" : "AWS::SNS::Subscription",
  "Properties" : {
    "Endpoint" : "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6c18091f182c0d0e0f420f0301" rel="noreferrer noopener nofollow">[email protected]</a>",
    "Protocol" : "email",
    "TopicArn" : {
    "Ref": "MySNSTopic"
    }
  }
}
}
}

Answer 1

要跨不同堆栈使用属性，您需要显式导出一端的值并导入到另一堆栈中。

在您的情况下，您可能需要这样的东西:

堆栈:sns-测试

{
    "Resources": {
        "MySNSTopic": {
            "Type": "AWS::SNS::Topic"
        }
    },
    "Outputs": {
        "MySNSTopicOutput": {
            "Description": "SNS topic arn",
            "Value": {
                "Ref": "MySNSTopic"
            },
            "Export": {
                "Name": {
                    "Fn::Sub": "${AWS::StackName}-MySNSTopicExport"
                }
            }
        }
    }
}

堆栈:sns-订阅

{
  "Resources": {
    "MySubscription": {
      "Type": "AWS::SNS::Subscription",
      "Properties": {
        "Endpoint": "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="1d7778736e5d7c6d747078746e69786f337e7270" rel="noreferrer noopener nofollow">[email protected]</a>",
        "Protocol": "email",
        "TopicArn": {
          "Fn::ImportValue" : "sns-test-MySNSTopicExport"
        }
      }
    }
  }
}