CloudFormation RDS Script

Question

I wrote a YML script for cloudformation configuring alert script is very simple and according to our need except i am facing an issue i want a dropdown RDS instance list in this script I tyred to read Aws documentation and other forms if any when have any idea please share .Note i created same script for ec2 instance in which a dropdown menu is visible and show all available ec2 instances mention below is the RDS script
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Parameters:
  sns:
    Type: String
    Default: Enter snstopic Name
    Description: Enter Your Sns Topic Name.
  EmailAdrs:
    Type: String
    Default: Enter Your Email Address
    Description: Enter Your Email Address.
  DBinstance:
    Type: 'AWS::RDS::DBInstanceIdentifier'
    Default: Select Your Instance
    Description: Select Your Instance from Dorpdown list.
Resources:
  snstopic:
    Type: 'AWS::SNS::Topic'
    Properties:
      TopicName: SampleTopic
      Subscription:
        - Endpoint: !Ref EmailAdrs
          Protocol: email
  RdsEventSubscription:
    Type: 'AWS::RDS::EventSubscription'
    Properties:
      SubscriptionName: Rdsfailure
      Enabled: true
      SnsTopicArn:
        Ref: snstopic
      SourceType: db-instance
      EventCategories:
        - failure
      SourceIds:
        - !Ref DBinstance

Accepted Answer

Hi There

There are only certain AWS-Specific parameters that are supported in a drop-down list.  AWS::RDS::DBInstanceIdentifier is not supported.  You are correct though that ec2 instance is one of the supported parameters which explains why it worked for you in that case.  You can use a custom list of AllowedVaulues for your RDS instances but you would need to keep it updated.

See this URL for the full list of supported AWS-Specific Parameter types

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section-structure.html#aws-specific-parameter-types

Answer

great I checked and test the code it is working perfectly  thanks for help

CloudFormation RDS Script

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