How can I use the condition within cloud formation for creating resources?

In the context of AWS, here is the step given of how you can implement conditions within the cloud formation template:-

Define condition in cloud formation

You can define the condition in the cloud formation template by using the “condition” section within the template. It would evaluate whether resources or a set of resources be created based on certain criteria.

Example scenario

Let us assume an example where you want to create an S3 bucket only if a specific environment variable is set to ‘production’.

Here is an example given of a cloud formation template snippet which would demonstrate how you can implement the condition for the above example:-

AWSTemplateFormatVersion: ‘2010-09-09’

Description: Example CloudFormation Template with Conditions

Parameters:

  EnvironmentType:

    Type: String

    Default: ‘development’

    AllowedValues: [‘development’, ‘production’]

    Description: Select the environment type

Conditions:

  CreateBucketCondition:

    !Equals [ !Ref EnvironmentType, ‘production’ ]

Resources:

  MyS3Bucket:

    Condition: CreateBucketCondition

    Type: AWS::S3::Bucket

    Properties:

      BucketName: !If [ CreateBucketCondition, ‘my-production-bucket’, ‘my-development-bucket’ ]