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Reference CloudFormation Parameters From The AWS System Manager Parameter Store

This article describes how to reference CloudFormation parameters from the AWS System Manager parameter store.

What Is The AWS Systems Manager Parameter Store?

AWS Systems Manager Parameter Store is a service that provides a centralized and secure way to manage your configuration data and secrets.

Create A Parameter In The Parameter Store

To begin with, search the parameter store in the search box.

Picture showing the parameter store service in search result

On the parameter store screen, click the Create parameter button.

Picture showing the Create Parameter button for creating the new parameter

The following screen will appear. Enter the details and click the Create parameter button.

Picture showing the Create parameter screen for creating the new parameter

The parameter is created.

Picture showing the parameter created in parameter store

Create A YAML File

Create the YAML file with the following content.

AWSTemplateFormatVersion: '2010-09-09'
Description: Create an S3 bucket with a name fetched from Parameter Store

Parameters:
  BucketNameParameter:
    Type: AWS::SSM::Parameter::Value<String>
    Default: /my-app/bucket-name
    Description: The name of the S3 bucket stored in Parameter Store

Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Ref BucketNameParameter

Outputs:
  BucketName:
    Description: The name of the created S3 bucket
    Value: !Ref S3Bucket

The parameter name in the above YAML file is Default.

Create A Cloudformation Stack

Create a CloudFormation stack by uploading the above YAML file as a template. The parameter name appears in the Parameters section.

Picture showing specifying the parameter while creating the stack

Output

Picture showing the bucket created using the parameter store

Posted By -	Karan Gupta

Posted On -	Sunday, February 16, 2025

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