{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Template Edited by Alex - CoreOS on EC2: http://coreos.com/docs/running-coreos/cloud-providers/ec2/",
  "Mappings": {
    "RegionMap": {
      "eu-central-1": {
        "AMI": "ami-cfca25a0"
      },
      "ap-northeast-1": {
        "AMI": "ami-72ae4313"
      },
      "us-gov-west-1": {
        "AMI": "ami-c42b94a5"
      },
      "ap-northeast-2": {
        "AMI": "ami-83ce05ed"
      },
      "sa-east-1": {
        "AMI": "ami-038c076f"
      },
      "ap-southeast-2": {
        "AMI": "ami-4b7a5428"
      },
      "ap-southeast-1": {
        "AMI": "ami-d704d5b4"
      },
      "us-east-1": {
        "AMI": "ami-6160910c"
      },
      "us-west-2": {
        "AMI": "ami-32a85152"
      },
      "us-west-1": {
        "AMI": "ami-79473c19"
      },
      "eu-west-1": {
        "AMI": "ami-c36effb0"
      }
    }
  },
  "Parameters": {
    "InstanceType": {
      "Description": "EC2 HVM instance type (m3.xlarge, etc).",
      "Type": "String",
      "Default": "m3.xlarge",
      "ConstraintDescription": "Must be a valid EC2 HVM instance type."
    },
    "ClusterSize": {
      "Default": "1",
      "MinValue": "1",
      "MaxValue": "12",
      "Description": "Number of nodes in cluster (1-12).",
      "Type": "Number"
    },
    "DiscoveryURL": {
      "Description": "An unique etcd cluster discovery URL. Grab a new token from https://discovery.etcd.io/new?size=<your cluster size>",
      "Type": "String"
    },
    "AdvertisedIPAddress": {
      "Description": "Use 'private' if your etcd cluster is within one region or 'public' if it spans regions or cloud providers.",
      "Default": "private",
      "AllowedValues": [
        "private",
        "public"
      ],
      "Type": "String"
    },
    "AllowSSHFrom": {
      "Description": "The net block (CIDR) that SSH is available to.",
      "Default": "0.0.0.0/0",
      "Type": "String"
    },
    "KeyPair": {
      "Description": "The name of an EC2 Key Pair to allow SSH access to the instance.",
      "Type": "String"
    }
  },
    "Resources": {
      "InstanceSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "GroupDescription": "Free For All",
        "SecurityGroupIngress": [
          {
            "IpProtocol": "tcp",
			"CidrIp": "0.0.0.0/0",
            "FromPort": "0",
            "ToPort": "65000"
          },
          {
            "IpProtocol": "udp",
			"CidrIp": "0.0.0.0/0",
            "FromPort": "0",
            "ToPort": "65000"
          }
        ]
      },
      "Metadata": {
        "AWS::CloudFormation::Designer": {
          "id": "058788dc-c071-4c53-801a-56c6857c047e"
        }
      }
    },
    "CoreOSServerAutoScale": {
      "Type": "AWS::AutoScaling::AutoScalingGroup",
      "Properties": {
        "AvailabilityZones": {
          "Fn::GetAZs": ""
        },
        "LaunchConfigurationName": {
          "Ref": "CoreOSServerLaunchConfig"
        },
        "MinSize": "1",
        "MaxSize": "12",
        "DesiredCapacity": {
          "Ref": "ClusterSize"
        },
        "Tags": [
          {
            "Key": "Name",
            "Value": {
              "Ref": "AWS::StackName"
            },
            "PropagateAtLaunch": true
          }
        ]
      },
      "Metadata": {
        "AWS::CloudFormation::Designer": {
          "id": "cdc255bb-45c7-4727-b32f-f586eea7a7be"
        }
      }
    },
    "CoreOSServerLaunchConfig": {
      "Type": "AWS::AutoScaling::LaunchConfiguration",
      "Properties": {
        "ImageId": {
          "Fn::FindInMap": [
            "RegionMap",
            {
              "Ref": "AWS::Region"
            },
            "AMI"
          ]
        },
        "InstanceType": {
          "Ref": "InstanceType"
        },
        "KeyName": {
          "Ref": "KeyPair"
        },
        "BlockDeviceMappings": [
          {
            "DeviceName": "/dev/xvda",
            "Ebs": {
              "VolumeSize": "50",
              "VolumeType": "standard",
			  "DeleteOnTermination": "true"
            }
          }          
        ],
        "SecurityGroups": [
          {
            "Ref": "InstanceSecurityGroup"
          }
        ],
        "UserData": {
          "Fn::Base64": {
            "Fn::Join": [
              "",
              [
                "#cloud-config\n\n",
                "coreos:\n",
                "  etcd2:\n",
                "    discovery: ",
                {
                  "Ref": "DiscoveryURL"
                },
                "\n",
                "    advertise-client-urls: http://$",
                {
                  "Ref": "AdvertisedIPAddress"
                },
                "_ipv4:2379\n",
                "    initial-advertise-peer-urls: http://$",
                {
                  "Ref": "AdvertisedIPAddress"
                },
                "_ipv4:2380\n",
                "    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001\n",
                "    listen-peer-urls: http://$",
                {
                  "Ref": "AdvertisedIPAddress"
                },
                "_ipv4:2380\n",
                "  units:\n",
                "    - name: etcd2.service\n",
                "      command: start\n",
                "    - name: fleet.service\n",
                "      command: start\n"
              ]
            ]
          }
        }
      },
      "Metadata": {
        "AWS::CloudFormation::Designer": {
          "id": "6b761ed7-1b28-40c8-a667-636a522425fb"
        }
      }
    }
  },
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