无法在 cloudformation 的父模板中使用内部（子）模板的输出

Question

我正在尝试在另一个中使用 cloudformation 堆栈的输出。我看了一些examoles，例如 https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/walkthrough-crossstackref.html

但这非常令人困惑，我无法在我的示例中使用它：

这是我所拥有的：我有一个 beanstalk.json 模板，我输出了我在资源部分创建的 sampleEnvironment：

{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": {
    "sampleApplication": {
        "Type": "AWS::ElasticBeanstalk::Application",
        "Properties": {
            "Description": "AWS Elastic Beanstalk Sample Application",
            "ApplicationName": "app-name-test"
        }
    },
    "sampleApplicationVersion": {
        "Type": "AWS::ElasticBeanstalk::ApplicationVersion",
        "Properties": {
            "ApplicationName": {
                "Ref": "sampleApplication"
            },
            "Description": "AWS ElasticBeanstalk Sample Application Version",
            "SourceBundle": {
                "S3Bucket": "test-war",
                "S3Key": "deployment.war"
            }
        }
    },
    "sampleConfigurationTemplate": {
        "Type": "AWS::ElasticBeanstalk::ConfigurationTemplate",
        "Properties": {
            "ApplicationName": {
                "Ref": "sampleApplication"
            },
            "Description": "AWS ElasticBeanstalk Sample Configuration Template",
            "OptionSettings": [{
                    "Namespace": "aws:autoscaling:asg",
                    "OptionName": "MinSize",
                    "Value": "2"
                },
                {
                    "Namespace": "aws:autoscaling:asg",
                    "OptionName": "MaxSize",
                    "Value": "3"
                },
                {
                    "Namespace": "aws:elasticbeanstalk:environment",
                    "OptionName": "EnvironmentType",
                    "Value": "LoadBalanced"
                }
            ],
            "SolutionStackName": "64bit Amazon Linux 2017.03 v2.6.1 running Tomcat 8 Java 8"
        }
    },
    "sampleEnvironment": {
        "Type": "AWS::ElasticBeanstalk::Environment",
        "Properties": {
            "ApplicationName": {
                "Ref": "sampleApplication"
            },
            "Description": "AWS ElasticBeanstalk Sample Environment",
            "TemplateName": {
                "Ref": "sampleConfigurationTemplate"
            },
            "VersionLabel": {
                "Ref": "sampleApplicationVersion"
            },
            "EnvironmentName": "test-dep-env-name"
        }
    }
},
 "Outputs": {
    "applicationName11": {
       "Description": "The application chosen by user is :",
       "Value": {
        "Ref": "sampleEnvironment"
      },
   "Export" : {
    "Name" : {"Ref": "sampleEnvironment"} 
    }
 }
}

现在我的问题开始了。我需要引用在 beanstalk.json 中创建的 sampleEnvironment 的名称，并将其分配给使用 beanstalk.json 模板的主模板资源部分中 s3 的名称。这是我的主要模板代码：

{
"Parameters": {
    "appName1": {
        "Description": "enter the app name",
        "Type": "String",
        "Default": "bn-test-jun"
    },
    "appEnv1": {
        "Description": "enter the app name",
        "Type": "String",
        "Default": "bn-test-jun"
    }
},
"Resources": {
    "CodeDeployEC2InstancesStack": {
        "Type": "AWS::CloudFormation::Stack",
        "Properties": {
            "TemplateURL": "https://s3.amazonaws.com/url...../beanstalk.json",
            "TimeoutInMinutes": "60"
        }
    },
    "myS3": {
        "Type": "AWS::S3::Bucket",
        "Properties": {
            "AccessControl": "PublicRead",
            "BucketName": "name of the environment returned as an output sth like Outputs.EnvironmentName"
        }
    }
}
 ,
 "Outputs":{
  "app":{
  "Description": "The application chosen by user is :",
     "Value": {
             "Fn::ImportValue" : "sampleEnvironment" 
     }
   }
 }
  }

现在您看到我在 bucketName 部分卡住了。我需要将在 beanstalk.json 中创建的环境名称分配给将要创建的 s3 存储桶的名称。我该怎么做？

Answer 1

导出参数需要有一个 Export property 才能被其他堆栈访问：

Export (optional)

The name of the resource output to be exported for a cross-stack reference.

Note

The following restrictions apply to cross-stack references:

For each AWS account, Export names must be unique within a region.

You can't create cross-stack references across regions.

You can use the intrinsic function Fn::ImportValue to import only values that have been exported within the same region.

For outputs, the value of the Name property of an Export can't use Ref or GetAtt functions that depend on a resource. Similarly, the ImportValue function can't include Ref or GetAtt functions that depend on a resource.

You can't delete a stack if another stack references one of its outputs.

You can't modify or remove an output value that is referenced by another stack.

您可以使用内部函数自定义导出的名称值。以下示例使用 Fn::Join 函数.

所以添加导出属性:

"Outputs": {
  "applicationName11": {
    "Description": "The application chosen by user is :",
    "Value": {
        "Ref": "sampleEnvironment"
    },
    "Export" : {
      "Name" : {
        "Fn::Join" : [ "-", [ { "Ref" : "AWS::StackName" }, {"Ref": "something"} ] ]
        }
     }
  }
}

然后您可以在必要时通过 Fn::ImportValue 导入它。 AWS 有一个 good example.

Answer 2

我已经在 CFN 课程论坛上回复了

https://acloud.guru/forums/aws-advanced-cloudformation/discussion/-KoAxjlT_ZtSAdrlg1lp/cannot_use_the_output_of_the_i

您不需要使用 Export/Import 值，因为您正在使用嵌套堆栈。

无法在 cloudformation 的父模板中使用内部（子）模板的输出

Cannot use the output of the inner (child ) template in the parent template in cloudformation

amazon-web-services

amazon-cloudformation