Parameter_Validate.template

{
  "AWSTemplateFormatVersion" : "2010-09-09",
 
  "Description" : "AWS CloudFormation Sample Template Parameter_Validate: Sample template showing how to validate string and numeric parameters. This template does not create any billable AWS Resources.",

  "Parameters" : {

    "NumberWithRange" : {
      "Type" : "Number",
      "MinValue" : "1",
      "MaxValue" : "10",
      "Default"  : "2",
      "Description" : "Enter a number between 1 and 10, default is 2"
    },
    "NumberWithAllowedValues" : {
      "Type" : "Number",
      "Default"  : "2", 
      "AllowedValues" : ["1", "2", "3", "10", "20"],
      "Description" : "Enter 1,2,3,10 or 20, default is 2"
    },
    "StringWithLength" : {
      "Type" : "String",
      "Default" : "Hello World",
      "MaxLength" : "20",
      "MinLength" : "5",
      "Description" : "Enter a string, between 5 and 20 characters in length",
      "ConstraintDescription" : "must have beteen 5 and 20 characters"
    },
    "StringWithAllowedValues" : {
      "Type" : "String",
      "Default" : "t1.micro",
      "AllowedValues" : ["t1.micro", "m1.small"],
      "Description" : "Enter t1.micro, m1.small, default is t1.micro"
    },
    "StringWithRegex" : {
      "Type" : "String",
      "Default" : "Hello",
      "AllowedPattern" : "[A-Za-z0-9]+",
      "MaxLength" : "10",
      "Description" : "Enter a string with alpha-numeric characters only",
      "ConstraintDescription" : "must only contain upper and lower case letters and numbers"
    }
  },

  "Resources" : {
    "myWaitHandle" : {
      "Type" : "AWS::CloudFormation::WaitConditionHandle"
    }
  },
  "Outputs" : {
    "NumberWithRange" : {
      "Value" : {"Ref" : "NumberWithRange" }
    },
    "NumberWithAllowedValues" : {
      "Value" : {"Ref" : "NumberWithAllowedValues" }
    },
    "StringWithLength" : {
      "Value" : {"Ref" : "StringWithLength" }
    },
    "StringWithAllowedValue" : {
      "Value" : {"Ref" : "StringWithAllowedValues" }
    },
    "StringWithRegex" : {
      "Value" : {"Ref" : "StringWithRegex" }
    }
  }
}