health Check Host
Parameters
value
The domain name that is used for health checks. Valid values: $SERVER_IP (default value): The private IP addresses of backend servers. If the $_ip parameter is set or the HealthCheckHost parameter is not set, SLB uses the private IP addresses of backend servers as the domain names for health checks. domain: The domain name must be 1 to 80 characters in length, and can contain only letters, digits, periods (.),and hyphens (-).