Nagios notification

host_notification_options：d = notify on DOWN host states,u = notify on UNREACHABLE host statesr = notify on host recoveries (UP states)f = notify when the host starts and stops flappings = send notifications when host or service scheduled downtime starts and endsn (none) as an option, the contact will not receive any type of host notifications.

service_notification_options:w = notify on WARNING service statesu = notify on UNKNOWN service statesc = notify on CRITICAL service statesr = notify on service recoveries (OK states)f = notify when the service starts and stops flappingn (none) as an option, the contact will not receive any type of service notifications.

常用的设置host_notification_options：d,u,rservice_notification_options:w,u,c,r