bring-your-own-cft.json

{
    "AWSTemplateFormatVersion" : "2010-09-09",
  
    "Description" : "AWS CloudFormation Sample Template RDS_PIOPS: Sample template showing how to create an Amazon RDS Database Instance with provisioned IOPs.**WARNING** This template creates an Amazon Relational Database Service database instance. You will be billed for the AWS resources used if you create a stack from this template.",
  
    "Parameters": {
      "DBUser": {
        "NoEcho": "true",
        "Description" : "The database admin account username",
        "Type": "String",
        "MinLength": "1",
        "MaxLength": "16",
        "AllowedPattern" : "[a-zA-Z][a-zA-Z0-9]*",
        "ConstraintDescription" : "must begin with a letter and contain only alphanumeric characters."
      },
  
      "DBPassword": {
        "NoEcho": "true",
        "Description" : "The database admin account password",
        "Type": "String",
        "MinLength": "8",
        "MaxLength": "41",
        "AllowedPattern" : "[a-zA-Z0-9]*",
        "ConstraintDescription" : "must contain only alphanumeric characters."
      }
    },
  
    "Resources" : {
      "myDB" : {
        "Type" : "AWS::RDS::DBInstance",
        "Properties" : {
          "AllocatedStorage" : "100",
          "DBInstanceClass" : "db.t2.small",
          "Engine" : "MySQL",
          "Iops" : "1000",
          "MasterUsername" : { "Ref" : "DBUser" },
          "MasterUserPassword" : { "Ref" : "DBPassword" }
        }
      }
    }
  }