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

  "Description" : "This template creates an instance and an EBS Volume.",

  "Parameters" : {

    "AvailabilityZone" : {
      "Description" : "The Availability Zone in which to launch the instance.",
      "Type" : "String",
      "Default" : "nova"
    },

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

    "InstanceType" : {
      "Description" : "WebServer EC2 instance type",
      "Type" : "String",
      "Default" : "m1.small",
      "AllowedValues" : [ "m1.tiny", "m1.small", "m1.medium", "m1.large", "m1.xlarge" ],
      "ConstraintDescription" : "must be a valid EC2 instance type."
    },

    "VolumeSize" : {
      "Description" : "WikiDatabase Volume size",
      "Type" : "Number",
      "Default" : "1",
      "MinValue" : "1",
      "MaxValue" : "1024",
      "ConstraintDescription" : "must be between 1 and 1024 Gb."
    },

    "LinuxDistribution": {
      "Default": "F17",
      "Description" : "Distribution of choice",
      "Type": "String",
      "AllowedValues" : [ "F17" ]
    }
  },

  "Mappings" : {
    "AWSInstanceType2Arch" : {
      "m1.tiny"    : { "Arch" : "32" },
      "m1.small"    : { "Arch" : "64" },
      "m1.medium"    : { "Arch" : "64" },
      "m1.large"   : { "Arch" : "64" },
      "m1.xlarge"   : { "Arch" : "64" }
    },
    "DistroArch2AMI": {
      "F17"      : { "32" : "F17-i386-cfntools", "64" : "F17-x86_64-cfntools" }
    }
  },

  "Resources" : {
    "Ec2Instance" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "AvailabilityZone" : { "Ref" : "AvailabilityZone" },
        "SecurityGroups" : [ { "Ref" : "InstanceSecurityGroup" } ],
        "ImageId" : { "Fn::FindInMap" : [ "DistroArch2AMI", { "Ref" : "LinuxDistribution" },
                          { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] },
        "InstanceType"   : { "Ref" : "InstanceType" },
        "KeyName"        : { "Ref" : "KeyName" },
        "Volumes" : [
          { "VolumeId" : { "Ref" : "NewVolume" },
            "Device" : "/dev/vdc1"
          }
        ]
      }
    },

    "InstanceSecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "Enable SSH access via port 22",
        "SecurityGroupIngress" : [ {
          "IpProtocol" : "tcp",
          "FromPort" : "22",
          "ToPort" : "22",
          "CidrIp" : "0.0.0.0/0"
        }]
      }
    },

    "NewVolume" : {
      "Type" : "AWS::EC2::Volume",
      "Properties" : {
        "Size" : { "Ref" : "VolumeSize" },
        "AvailabilityZone" : { "Ref" : "AvailabilityZone" }
      }
    }
  },

  "Outputs" : {
    "InstanceId" : {
      "Description" : "InstanceId of the newly created EC2 instance",
      "Value" : { "Ref" : "Ec2Instance" }
    },
    "PublicIP" : {
      "Description" : "Public IP address of the newly created EC2 instance",
      "Value" : { "Fn::GetAtt" : [ "Ec2Instance", "PublicIp" ] }
    },
    "PublicDNS" : {
      "Description" : "Public DNSName of the newly created EC2 instance",
      "Value" : { "Fn::GetAtt" : [ "Ec2Instance", "PublicDnsName" ] }
    }
  }
}