Cloudformation Reference Security group in DBCluster

Question

I am creating a Database cluster with two DB instance using cloudformation.

For this i am able to create

DBSecGroup: Type: AWS::EC2::SecurityGroup

Then i need to reference it in property VpcSecurityGroupIds.

DBCluster: Type: "AWS::RDS::DBCluster" VpcSecurityGroupIds: ?

VpcSecurityGroupIds requires List. Not sure how i can do this.

Answer 1

Try one of these two:

DBCluster:
  Type: AWS::RDS::DBCluster
  Properties:
    VpcSecurityGroupIds:
      - !GetAtt DBSecGroup.GroupId

DBCluster:
  Type: AWS::RDS::DBCluster
  Properties:
    VpcSecurityGroupIds:
      - !Ref DBSecGroup

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group.html#w2ab1c21c10d102d104c13