使用提供的参数将资源命名为云形成堆栈

Question

Im new to cloudformation and intrinsc function. I am trying to run a stack with the template which accepts ent type as parameter Using this parameter I would like to name my s3 bucket.

But Im getting 400 Bad request

My template { "AWSTemplateFormatVersion": "2010-09-09", "Description": "Creates an S3 bucket using parameters supplied.", "Parameters": {

    "AssetInsightId": {
        "Description": "Asset Insight ID",
        "Type": "String",
        "Default": "###"
    },
    "ResourceOwner": {
        "Description": "tr:resource-owner",
        "Type": "String",
        "Default": "###"
    },
    "EnvironmentType": {
        "Description": "tr:environment-type",

         "Default": "PREPROD",
        "Type": "String",
        "AllowedValues": ["PREPROD", "PROD"],
        "ConstraintDescription": "must specify PREPROD, PROD."
    }
},
"Resources": {
    "ResourceBucket": {
        "Type": "AWS::S3::Bucket",
        "Properties": {
            "BucketName": "!Sub a${AssetInsightId}-S3Bucket-${EnvironmentType}",
            "VersioningConfiguration": {
                "Status": "Enabled"
            },
            "Tags": [

                {
                    "Key": "tr:application-asset-insight-id",
                    "Value": "${AssetInsightId}"
                },
                {
                    "Key": "tr:resource-owner",
                    "Value": "${ResourceOwner}"
                },
                {
                    "Key": "tr:environment-type",
                    "Value": "${EnvironmentType}"
                }
            ]
        }
    }
},
"Outputs": {
    "BucketName": {
        "Description": "Name of the S3 Resource Bucket",
        "Value": "!Ref ResourceBucket"
    }
}

}

Answer 1

Using the AWS CLI - for passing dynamic parameters

aws cloudformation create-stack  --stack-name my-stack
--template-body template.json 
--parameters  ParameterKey=EnvironmentType,ParameterValue=Development

From here

Also !Sub is the syntax for the short form of Fn::Sub: - used in template YAML

{ "Fn::Sub" : String } - used in template JSON

Fn::Sub

Change

"BucketName": "!Sub a${AssetInsightId}-S3Bucket-${EnvironmentType}",

To

"BucketName": { "Fn::Sub": "a${AssetInsightId}-S3Bucket-${EnvironmentType}"},

Example