Keeping admins up-to-date
Nagios possesses a sophisticated notification system. On the sender side (that is, with the host or service check) you can configure when each group of persons—the so-called contact groups—are informed about which conditions or events (failure, recovery, warnings, etc.). On the receiver side you can also define on multiple levels what is to be done with a corresponding message—for example whether the system should forward it, depending on the time of day, or discard the message.
If a specific service is to be monitored seven days a week round the clock, this does not mean that the administrator in charge will never be able to take a break. For example, you can instruct Nagios to notify the person only from Monday to Friday ...
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