auto-scaling AppServerGroup

gistfile1.json

{
    "AppServerGroup": {
        "Type": "AWS::AutoScaling::AutoScalingGroup",
        "Properties": {
            "AvailabilityZones": {
                "Fn::GetAZs": ""
            },
            "LaunchConfigurationName": {
                "Ref": "ChefClient"
            },
            "LoadBalancerNames": [
                {
                    "Ref": "app.stratalux.com"
                }
            ],
            "MinSize": "3",
            "MaxSize": "6",
            "HealthCheckType": "ELB",
            "HealthCheckGracePeriod": "720",
            "NotificationConfiguration": {
                "TopicARN": {
                    "Ref": "AppServerSNSTopic"
                },
                "NotificationTypes": [
                    "autoscaling:EC2_INSTANCE_LAUNCH",
                    "autoscaling:EC2_INSTANCE_LAUNCH_ERROR",
                    "autoscaling:EC2_INSTANCE_TERMINATE",
                    "autoscaling:EC2_INSTANCE_TERMINATE_ERROR"
                ]
            }
        }
    }
}