CODEWITHSUNDEEP
jsonamazon-web-servicesparametersyamlaws-cloudformation
niketp
niketp

Reputation: 459

Adding a list to the parameters file for Cloudformation template

I have a cloudformation template in which I send a JSON parameters file over. It was not a real problem, as my parameters file used to look like this:

[
    "InstanceType=t2.medium",
    "AmiStack=amilookup-stack"
]

However, I want to add a list to the parameters file, something like this:

[
    "InstanceType=t2.medium",
    "AmiStack=amilookup-stack",
    [
        "CertificateArn1=arn:aws:acm:us-east-1:xxx",
        "CertificateArn2=arn:aws:acm:us-east-1:xxy",
    ]
]

What is the best way to express this in my parameters json file, and how to express this in the cloudformation template itself?enter code here

Upvotes: 2

Views: 3881

Answers (1)

Ankit Gupta
Ankit Gupta

Reputation: 760

This is a known problem with Cloudformation. You can use comma demlimited list as parameter type.

Cloudformation Template (test.json)

 {
  "AWSTemplateFormatVersion": "2010-09-09",
  "Parameters": {
    "Name": {
      "Type": "String",
      "Description": "SubnetGroup Name"
    },
    "Subnets": {
      "Type": "CommaDelimitedList",
      "Description": "The list of SubnetIds in your Virtual Private Cloud (VPC)"
    }
  },
  "Resources": {
    "myDBSubnetGroup": {
      "Type": "AWS::RDS::DBSubnetGroup",
      "Properties": {
        "DBSubnetGroupDescription": "description",
        "DBSubnetGroupName": {
          "Ref": "Name"
        },
        "SubnetIds": {
          "Ref": "Subnets"
        }
      }
    }
  }
}

Parameter.json

[
  {
    "ParameterKey": "Name",
    "ParameterValue": "testName"
  },
  {
    "ParameterKey": "Subnets",
    "ParameterValue": "subnet-abcdefg,subnet-abcdef1,subnet-abcdef2"
  }
]


aws cloudformation create-stack --stack-name testStack --template-body file://test.json --parameters file://parameter.json --profile yourawsprofile

Upvotes: 5

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