Add check comment for NSClient++.

Refs #5795

doc/4-monitoring-remote-systems.md

@@ -103,52 +103,26 @@ known for its magnificent Windows support. There are alternatives like the WMI i
 but using `NSClient++` will allow you to run local scripts similar to check plugins fetching
 the required output and performance counters.
 
-The NSClient++ agent uses its own configuration format while `check_nt`
-can be embedded into the Icinga 2 `CheckCommand` configuration syntax.
+You can use the `check_nt` plugin from the Monitoring Plugins project to query NSClient++.
+Icinga 2 provides the [nscp check command](#plugin-check-command-nscp) for this:
 
 Example:
 
-    object CheckCommand "check_nscp" {
-      import "plugin-check-command"
-
-      command = [
-        PluginDir + "/check_nt",
-        "-H", "$address$",
-        "-p", "$port$",
-        "-v", "$remote_nscp_command$",
-        "-l", "$partition$",
-        "-w", "$warn$",
-        "-c", "$crit$",
-        "-s", "$pass$"
-      ]
-
-      vars = {
-        "port" = "12489"
-        "pass" = "supersecret"
-      }
-    }
-
-    object Service "users" {
+    object Service "disk" {
       import "generic-service"
   
       host_name = "remote-windows-host"
 
-      check_command = "check_nscp"
+      check_command = "nscp"
 
-      vars += {
-        remote_nscp_command = "USEDDISKSPACE"
-        partition = "c"
-        warn = "70"
-        crit = "80"
-      }
+      vars.nscp_variable = "USEDDISKSPACE"
+      vars.nscp_params = "c"
+      vars.nscp_warn = 70
+      vars.nscp_crit = 80
     }
 
 For details on the `NSClient++` configuration please refer to the [official documentation](http://www.nsclient.org/nscp/wiki/doc/configuration/0.4.x).
 
-> **Note**
-> 
-> The format of the `NSClient++` configuration file has changed from 0.3.x to 0.4!
-
 ### <a id="agent-based-checks-icinga2-agent"></a> Icinga 2 Agent
 
 A dedicated Icinga 2 agent supporting all platforms and using the native

doc/9-appendix.md

@@ -304,6 +304,23 @@ snmp_address    | **Optional.** The host's address. Defaults to "$address$".
 snmp_oid        | **Optional.** The SNMP OID. Defaults to "1.3.6.1.2.1.1.3.0".
 snmp_community  | **Optional.** The SNMP community. Defaults to "public".
 
+#### <a id="plugin-check-command-nscp"></a> nscp
+
+Check command object for the `check_nt` plugin.
+
+Custom Attributes:
+
+Name            | Description
+----------------|--------------
+nscp_address    | **Optional.** The host's address. Defaults to "$address$".
+nscp_port       | **Optional.** The NSClient++ port. Defaults to 12489.
+nscp_password   | **Optional.** The NSClient++ password.
+nscp_variable   | **Required.** The variable that should be checked.
+nscp_params     | **Optional.** Parameters for the query.
+nscp_warn       | **Optional.** The warning threshold.
+nscp_crit       | **Optional.** The critical threshold.
+nscp_timeout    | **Optional.** The query timeout in seconds.
+
 #### <a id="plugin-check-command-apt"></a> apt
 
 Check command for the `check_apt` plugin.

itl/command-plugins.conf

@@ -286,3 +286,23 @@ object CheckCommand "apt" {
 		PluginDir + "/check_apt"
 	]
 }
+
+object CheckCommand "nscp" {
+	import "plugin-check-command"
+
+	command = PluginDir + "/check_nt"
+
+	arguments = {
+		"-H" = "$nscp_address$",
+		"-p" = "$nscp_port$",
+		"-s" = "$nscp_password$",
+		"-v" = { value = "$nscp_variable$", required = true },
+		"-l" = "$nscp_params$",
+		"-w" = "$nscp_warn$",
+		"-c" = "$nscp_crit$",
+		"-t" = "$nscp_timeout$
+	}
+
+	vars.nscp_address = "$address$"
+	vars.nscp_port = 12489
+}