In this recipe, we'll learn how to define a contact group for a host. We'll demonstrate this as part of the general best practice of sending notifications to contact groups, rather than to individual contacts. This allows for more flexibility in assigning individual contacts to the appropriate groups for receiving appropriate notifications.
You should have a Nagios Core 4.0 or newer server with at least one host configured already. We'll use the example of
sparta.example.net, a host defined in its own file, which we'll configure to send its notifications to an existing contact group called
We can configure notifications to be sent to our contact group as follows:
Change to the objects configuration directory for Nagios Core. The default is
/usr/local/nagios/etc/objects. If you've put the definition for your host in a different file, move to that directory instead.
# cd /usr/local/nagios/etc/objects
The notifications will...