Simple CoreOS CloudFormation template. Launches, but etcd doesn't seem to work right.

coreos.json

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Simple CoreOS install",
    "Parameters": {
        "GistURL": {
            "Description": "URL to a github gist with your public key",
            "Type": "String"
        },
        "KeyName": {
            "Description": "EC2 keypair name",
            "Type": "String"
        }
    },
    "Resources": {
        "CoreOSGroup": {
            "Properties": {
                "AvailabilityZones": {
                    "Fn::GetAZs": ""
                },
                "LaunchConfigurationName": {
                    "Ref": "LaunchConfig"
                },
                "MaxSize": "3",
                "MinSize": "3",
                "Tags": [
                    {
                        "Key": "Name",
                        "PropagateAtLaunch": true,
                        "Value": "CoreOS Instance"
                    }
                ]
            },
            "Type": "AWS::AutoScaling::AutoScalingGroup"
        },
        "CoreOSSecurityGroup": {
            "Properties": {
                "GroupDescription": "Enable SSH and mosh access",
                "SecurityGroupIngress": [
                    {
                        "CidrIp": "0.0.0.0/0",
                        "FromPort": "22",
                        "IpProtocol": "tcp",
                        "ToPort": "22"
                    }
                ]
            },
            "Type": "AWS::EC2::SecurityGroup"
        },
        "Etcd4001IngressRule": {
            "Properties": {
                "FromPort": "4001",
                "GroupName": {
                    "Ref": "CoreOSSecurityGroup"
                },
                "IpProtocol": "tcp",
                "SourceSecurityGroupName": {
                    "Ref": "CoreOSSecurityGroup"
                },
                "ToPort": "4001"
            },
            "Type": "AWS::EC2::SecurityGroupIngress"
        },
        "Etcd7001IngressRule": {
            "Properties": {
                "FromPort": "7001",
                "GroupName": {
                    "Ref": "CoreOSSecurityGroup"
                },
                "IpProtocol": "tcp",
                "SourceSecurityGroupName": {
                    "Ref": "CoreOSSecurityGroup"
                },
                "ToPort": "7001"
            },
            "Type": "AWS::EC2::SecurityGroupIngress"
        },
        "LaunchConfig": {
            "Properties": {
                "ImageId": "ami-803175e9",
                "InstanceType": "t1.micro",
                "KeyName": {
                    "Ref": "KeyName"
                },
                "SecurityGroups": [
                    {
                        "Ref": "CoreOSSecurityGroup"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Ref": "GistURL"
                    }
                }
            },
            "Type": "AWS::AutoScaling::LaunchConfiguration"
        }
    }
}