{
  "AWSTemplateFormatVersion" : "2010-09-09",

  "Description" : "AWS CloudFormation Sample Template EC2_Instance_With_Block_Device_Mapping: Example to show how to attach EBS volumes and modify the root device using EC2 block device mappings. **WARNING** This template creates an Amazon EC2 instance. You will be billed for the AWS resources used if you create a stack from this template.",

  "Parameters" : {
    "InstanceType" : {
      "Description" : "WebServer EC2 instance type",
      "Type" : "String",
      "Default" : "m1.small",
      "AllowedValues" : [ "t1.micro","m1.small","m1.medium","m1.large","m1.xlarge","m3.xlarge","m3.2xlarge","m2.xlarge","m2.2xlarge","m2.4xlarge","c1.medium","c1.xlarge","cc1.4xlarge","cc2.8xlarge","cg1.4xlarge","hi1.4xlarge","hs1.8xlarge"],
      "ConstraintDescription" : "must be a valid EC2 instance type."
    },

    "KeyName" : {
      "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the web server",
      "Type" : "String"
    },

    "SSHFrom": {
      "Description": "Lockdown SSH access to the bastion host (default can be accessed from anywhere)",
      "Type": "String",
      "MinLength": "9",
      "MaxLength": "18",
      "Default": "0.0.0.0/0",
      "AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "ConstraintDescription": "must be a valid CIDR range of the form x.x.x.x/x."
    }
  },

  "Mappings" : {
    "AWSInstanceType2Arch" : {
      "t1.micro"    : { "Arch" : "PV64" },

      "m1.small"    : { "Arch" : "PV64" },
      "m1.medium"   : { "Arch" : "PV64" },
      "m1.large"    : { "Arch" : "PV64" },
      "m1.xlarge"   : { "Arch" : "PV64" },

      "m3.xlarge"   : { "Arch" : "PV64" },
      "m3.2xlarge"  : { "Arch" : "PV64" },

      "m2.xlarge"   : { "Arch" : "PV64" },
      "m2.2xlarge"  : { "Arch" : "PV64" },
      "m2.4xlarge"  : { "Arch" : "PV64" },

      "c1.medium"   : { "Arch" : "PV64" },
      "c1.xlarge"   : { "Arch" : "PV64" },

      "cc1.4xlarge" : { "Arch" : "CLU64" },
      "cc2.8xlarge" : { "Arch" : "CLU64" },

      "cg1.4xlarge" : { "Arch" : "GPU64" },

      "hi1.4xlarge" : { "Arch" : "PV64" },

      "hs1.8xlarge" : { "Arch" : "PV64" }
    },

    "AWSRegionArch2AMI" : {
      "us-east-1"      : { "PV64" : "ami-3c994355", "CLU64" : "ami-08249861",      "GPU64" : "ami-02f54a6b" },
      "us-west-2"      : { "PV64" : "ami-20800c10", "CLU64" : "ami-2431bf14",      "GPU64" : "NOT_YET_SUPPORTED" },
      "us-west-1"      : { "PV64" : "ami-87712ac2", "CLU64" : "NOT_YET_SUPPORTED", "GPU64" : "NOT_YET_SUPPORTED" },
      "eu-west-1"      : { "PV64" : "ami-c37474b7", "CLU64" : "ami-d97474ad",      "GPU64" : "ami-1b02026f" },
      "ap-southeast-1" : { "PV64" : "ami-a6a7e7f4", "CLU64" : "NOT_YET_SUPPORTED", "GPU64" : "NOT_YET_SUPPORTED" },
      "ap-southeast-2" : { "PV64" : "ami-bd990e87", "CLU64" : "NOT_YET_SUPPORTED", "GPU64" : "NOT_YET_SUPPORTED" },
      "ap-northeast-1" : { "PV64" : "ami-4e6cd34f", "CLU64" : "NOT_YET_SUPPORTED", "GPU64" : "NOT_YET_SUPPORTED" },
      "sa-east-1"      : { "PV64" : "ami-1e08d103", "CLU64" : "NOT_YET_SUPPORTED", "GPU64" : "NOT_YET_SUPPORTED" }
    }
  },

  "Resources" : {
    "Ec2Instance" : {
      "Type" : "AWS::EC2::Instance", 
      "Properties" : {
        "ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" }, 
                                          { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] },
        "KeyName" : { "Ref" : "KeyName" },
        "InstanceType" : { "Ref" : "InstanceType" },
        "SecurityGroups" : [{ "Ref" : "Ec2SecurityGroup" }],
        "BlockDeviceMappings" : [
          {
            "DeviceName" : "/dev/sda1",
            "Ebs" : { "VolumeSize" : "50" } 
          },{
            "DeviceName" : "/dev/sdm",
            "Ebs" : { "VolumeSize" : "100" }
          }
        ]
      }
    },

    "Ec2SecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "HTTP and SSH access",
        "SecurityGroupIngress" : [ {
          "IpProtocol" : "tcp", 
          "FromPort" : "22", "ToPort" : "22", 
          "CidrIp" : { "Ref" : "SSHFrom" }
        } ]
      }
    }
  },

  "Outputs" : {
    "Instance" : {
      "Value" : { "Fn::GetAtt" : [ "Ec2Instance", "PublicDnsName" ] }, 
      "Description" : "DNS Name of the newly created EC2 instance"
    }
  }
}