Add "random" CheckCommand for test and demo purposes

fixes #8816

doc/7-icinga-template-library.md

@@ -58,6 +58,14 @@ Name         | Description
 -------------|---------------
 cluster_zone | **Optional.** The zone name. Defaults to "$host.name$".
 
+### <a id="itl-random"></a> random
+
+Check command for the built-in `random` check. This check returns random states
+and adds the check source to the check output.
+
+For test and demo purposes only. The `random` check command does not support
+any vars.
+
 # <a id="plugin-check-commands"></a> Plugin Check Commands
 
 The Plugin Check Commands provides example configuration for plugin check commands

itl/command-icinga.conf

@@ -31,3 +31,6 @@ object CheckCommand "cluster-zone" {
 	vars.cluster_zone = "$host.name$"
 }
 
+object CheckCommand "random" {
+	import "random-check-command"
+}

itl/command.conf

@@ -46,3 +46,7 @@ template NotificationCommand "plugin-notification-command" {
 template EventCommand "plugin-event-command" {
 	execute = PluginEvent
 }
+
+template CheckCommand "random-check-command" {
+	execute = RandomCheck
+}