nagios: Create service groups automatically

nagios/manifests/init.pp

@@ -584,8 +584,23 @@ define nagios::service($host, $command, $description, $group="NONE",
     }
 
     if $group != "NONE" {
+        if !defined(Nagios_servicegroup[$group]) {
+            file { "${confdir}/servicegroup_${group}.cfg":
+                ensure  => present,
+                mode    => "0640",
+                owner   => "root",
+                group   => "nagios",
+                before  => Nagios_servicegroup[$group],
+                require => File["/etc/nagios/conf.d"],
+            }
+            nagios_servicegroup { $group:
+                target => "${confdir}/servicegroup_${group}.cfg",
+                notify => Service["nagios"],
+            }
+        }
         Nagios_service[$name] {
             contact_groups => "all,${group}",
+            servicegroups  => $group,
         }
     }