如何將CloudFormation創建的SNS主題ARN輸出到命令行？

Question

我有一個CloudFormation模板，該模板調用lambda函數來創建SNS主題。

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Parameters": {
        "AGS": {
            "Type": "String",
            "AllowedPattern": "[a-zA-Z0-9_]+"
        },
        "Secret": {
            "Type": "String",
            "AllowedPattern": "[a-zA-Z0-9_]+",
            "NoEcho": true
        },
        "SDLC": {
            "Type": "String",
            "AllowedValues": [
                "D",
                "I",
                "J",
                "Q",
                "S",
                "U",
                "P",
                "C"
            ]
        },
        "Component": {
            "Type": "String",
            "AllowedPattern": "[a-zA-Z0-9_]+"
        },
        "Topic": {
            "Type": "String",
            "AllowedPattern": "[a-zA-Z0-9_]+"
        },
        "TopicLambda": {
            "Type": "String",
            "AllowedPattern": "[a-zA-Z0-9_-]+"
        }
    },
    "Resources": {
        "BRIDGE2ESBTOPIC": {
            "Type": "Custom::EnterpriseTopic",
            "Version": 1,
            "Properties": {
                "ServiceToken": {
                    "Fn::Join": [
                        ":",
                        [
                            "arn",
                            "aws",
                            "lambda",
                            {
                                "Ref": "AWS::Region"
                            },
                            {
                                "Ref": "AWS::AccountId"
                            },
                            "function",
                            {
                                "Ref": "TopicLambda"
                            }
                        ]
                    ]
                },
                "AGS": {
                    "Ref": "AGS"
                },
                "Secret": {
                    "Ref": "Secret"
                },
                "SDLC": {
                    "Ref": "SDLC"
                },
                "Component": {
                    "Ref": "Component"
                },
                "ResourceName": {
                    "Ref": "Topic"
                }
            }
        }
    },

    //This will only output to CloudFormation console, not to command line.
    "Outputs": {
        "Topic": {
            "Description" : "Topic created by this template",
            "Value": {"Ref": "BRIDGE2ESBTOPIC"}
        }
    }
}

在命令行中運行命令后，我在命令行中得到如下響應：

> aws cloudformation create-stack --stack-name stack3 --template-body file://template.json --parameters file://parameters.json      
{                                                                                                                                   
    "StackId": "arn:aws:cloudformation:us-east-1:465257512377:stack/stack3/72747670-aa8b-11e6-85de-500c286e1a36"                    
}

該響應僅告訴我剛剛創建的StackId 。 有什么方法可以將僅由此CloudFormation模板創建的主題ARN輸出到命令行？ 謝謝。

Answer 1

創建堆棧后，可以使用aws cloudformation describe-stacks --stack-name stack3
這將顯示輸出部分（在您的情況下為Topic ARN）

Answer 2

使用query 選項 描述Stacks將是最直接的路徑。

例

aws cloudformation describe-stacks\
--stack-name yourStackIDName\
--query 'Stacks[0].Outputs[0].OutputValue'\
--output text

你的例子

aws cloudformation describe-stacks\
--stack-name arn:aws:cloudformation:us-east-1:465257512377:stack/stack3/72747670-aa8b-11e6-85de-500c286e1a36\
--query 'Stacks[0].Outputs[0].OutputValue'\
--output text