Creates AWS resources described in http://coreos.com/docs/ec2/

coreos-example.json

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Core ec2 example: http://coreos.com/docs/ec2/",
    
    "Parameters": {
        "InstanceType" : {
            "Description" : "EC2 instance type",
            "Type" : "String",
            "Default" : "t1.micro",
            "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."
        },
        "ClusterSize": {
            "Default": "3",
            "Description": "Number of nodes in cluster.",
            "Type": "Number"
        },
        "SecretGist": {
            "Description": "Url of secret gist.",
            "Type": "String"
        }
    },
    "Resources": {
        "CoreOSSecurityGroup": {
            "Type": "AWS::EC2::SecurityGroup",
            "Properties": {
                "GroupDescription": "CoreOS SecurityGroup",
                "SecurityGroupIngress": [
                    {"IpProtocol": "tcp", "FromPort": "22", "ToPort": "22", "CidrIp": "0.0.0.0/0"}
                ]
            }
        },
        "Ingress4001": {
            "Type": "AWS::EC2::SecurityGroupIngress",
            "Properties": {
                "GroupName": {"Ref": "CoreOSSecurityGroup"}, "IpProtocol": "tcp", "FromPort": "4001", "ToPort": "4001", "SourceSecurityGroupName": {"Ref": "CoreOSSecurityGroup"}
            }
        },
        "Ingress7001": {
            "Type": "AWS::EC2::SecurityGroupIngress",
            "Properties": {
                "GroupName": {"Ref": "CoreOSSecurityGroup"}, "IpProtocol": "tcp", "FromPort": "7001", "ToPort": "7001", "SourceSecurityGroupName": {"Ref": "CoreOSSecurityGroup"}
            }
        },
        "CoreOSServerAutoScale": {
            "Type": "AWS::AutoScaling::AutoScalingGroup",
            "Properties": {
                "AvailabilityZones": {"Fn::GetAZs": ""},
                "LaunchConfigurationName": {"Ref": "CoreOSServerLaunchConfig"},
                "MinSize": {"Ref": "ClusterSize"},
                "MaxSize": "12",
                "DesiredCapacity": {"Ref": "ClusterSize"},
                "Tags": [
                    {"Key": "Name", "Value": "coreos-server", "PropagateAtLaunch": true}
                ]
            }
        },
        "CoreOSServerLaunchConfig": {
            "Type": "AWS::AutoScaling::LaunchConfiguration",
            "Properties": {
                "ImageId": "ami-bf5b18d6",
                "InstanceType": {"Ref": "InstanceType"},
                "SecurityGroups": [{"Ref": "CoreOSSecurityGroup"}],
                "UserData": {"Fn::Base64": {"Ref": "SecretGist"}}
            }
        }
    }
}