nested.template

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description": "Template for combining all templates into one nested template for testing.",
  "Parameters": {
    "VpcURL": {
      "Type": "String",
      "Default": "https://s3.amazonaws.com/mys3bucketacloudguru/vpc.template",
      "Description": "Template URL for VPC Network."
    },
    "WordpressURL": {
      "Type": "String",
      "Default": "https://s3.amazonaws.com/mys3bucketacloudguru/wordpress.template",
      "Description": "Template URL for Wordpress and RDS."
    },
    "s3URL": {
      "Type": "String",
      "Default": "https://s3.amazonaws.com/mys3bucketacloudguru/s3.template",
      "Description": "Template URL for S3 Bucket."
    }    
  },
  "Resources" : {
    "Vpc" : {
       "Type" : "AWS::CloudFormation::Stack",
     	   "Properties" : {
         "TemplateURL" : { "Ref": "VpcURL" },
         "Parameters" :
          {
            "CIDRRange": "10.250.0.0"
          }
	       }
    },
    "Mys3Bucket" : {
       "Type" : "AWS::CloudFormation::Stack",
         "Properties" : {
         "TemplateURL" : { "Ref": "s3URL" }
       }
    },
    "WordpressApp" : {
       "Type" : "AWS::CloudFormation::Stack",
         "DependsOn" : "Vpc",         
         "Properties" : {
         "TemplateURL" : { "Ref": "WordpressURL" },
         "Parameters" :
          {
            "VPCID"               : {"Fn::GetAtt": ["Vpc", "Outputs.VPCID"]},
            "PrivateSubnets"      : {"Fn::Join": [",", [{"Fn::GetAtt": ["Vpc", "Outputs.SubnetPrivateAZ1"]}, {"Fn::GetAtt": ["Vpc", "Outputs.SubnetPrivateAZ2"]}]]},
            "ELBSubnet"           : {"Fn::Join": [",", [{"Fn::GetAtt": ["Vpc", "Outputs.SubnetPublicAZ1"]}, {"Fn::GetAtt": ["Vpc", "Outputs.SubnetPublicAZ2"]}]]},
            "DBUser"              : "mywordpressuser",
            "DBPassword"          : "mysup3rs3cr3tP4sSw0rd"
          }
       }
    }
  },
  "Outputs": {
    "WordpressURL"  : { "Value": {"Fn::GetAtt": ["WordpressApp", "Outputs.WebsiteURL"]}}
  }
}