contrib: add munin plugins

Signed-off-by: Gilles Bouthenot <gilles.bouthenot@univ-fcomte.fr>

contrib/Makefile.am

@@ -1,3 +1,3 @@
 contribdir = $(datadir)/dhcpd-pools/
 dist_contrib_SCRIPTS = dhcpd-pools.cgi snmptest.pl
-EXTRA_DIST = nagios.conf
+EXTRA_DIST = nagios.conf munin_plugins

contrib/munin_plugins/dhcpstats_abs.js

@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+
+var command = "dhcpd-pools"
+var timeout = 5000;     // (ms) if the command take longer, then kill it
+
+var execFile = require('child_process').execFile;
+var echo     = require('util').print;
+
+var arg = process.argv[2];
+
+if ("autoconf" === arg) {
+    echo("yes\n");
+    return 0;
+}
+
+execFile(command, [ "--format=j", "--sort=n" ], { timeout: timeout }, function(error, stdout, stderr) {
+    if (error !== null) {
+        console.log('exec error: ' + error);
+        return 1;
+    }
+
+    stdout = JSON.parse(stdout);
+
+    if ("config" === arg) {
+        echo("graph_title dhcp usage (number of machines)\n");
+        echo("graph_vlabel nb of machines\n");
+        echo("graph_scale no\n");
+        echo("graph_category network\n");
+
+        stdout["subnets"].forEach(function(subnet) {
+            var location = subnet["location"];
+            var range    = subnet["range"];
+            echo(location + '.label ' + location + ' (' + range + ')\n');
+        });
+    } else {
+        stdout["shared-networks"].forEach(function(network) {
+            var location = network["location"];
+            var used     = network["used"];
+            var defined  = network["defined"];
+            echo(location + '.value ' + used + '\n');
+        });
+    }
+
+});

contrib/munin_plugins/dhcpstats_abs.php

@@ -0,0 +1,37 @@
+#!/usr/bin/env php
+<?php
+error_reporting(E_ALL);
+ini_set("display_errors", true);
+
+$ret="";
+$xml = exec("dhcpd-pools --format x --sort n", $ret);
+$xml = join($ret);
+
+$xml = new SimpleXMLElement($xml);
+
+
+if ($argc>1 && $argv[1]=="autoconf") {
+    echo "yes\n";
+    return;
+} elseif ($argc>1 && $argv[1]=="config") {
+    $xml2 = $xml->xpath("subnet");
+    echo "graph_title dhcp usage (number of machines)\n";
+    echo "graph_vlabel nb of machines\n";
+    echo "graph_scale no\n";
+    echo "graph_category network\n";
+    foreach ($xml2 as $xml3) {
+        $location = (string) $xml3->location;
+	$range    = (string) $xml3->range;
+        echo "$location.label $location ($range)\n";
+    }
+} else {
+    $xml2 = $xml->xpath("shared-network");
+    foreach ($xml2 as $xml3) {
+        $location = (string) $xml3->location;
+        $used     = (int) $xml3->used;
+        $defined  = (int) $xml3->defined;
+        $pourcent = ceil($used*10000/$defined)/100;
+        echo "$location.value $used\n";
+    }
+}
+

contrib/munin_plugins/dhcpstats_percent.js

@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+var command = "dhcpd-pools"
+var timeout = 5000;     // (ms) if the command take longer, then kill it
+
+var execFile = require('child_process').execFile;
+var echo     = require('util').print;
+
+var arg = process.argv[2];
+
+if ("autoconf" === arg) {
+    echo("yes\n");
+    return 0;
+}
+
+execFile(command, [ "--format=j", "--sort=n" ], { timeout: timeout }, function(error, stdout, stderr) {
+    if (error !== null) {
+        console.log('exec error: ' + error);
+        return 1;
+    }
+
+    stdout = JSON.parse(stdout);
+
+    if ("config" === arg) {
+        echo("graph_title dhcp usage (in percent)\n");
+        echo("graph_args --upper-limit 100 -l 0 --rigid\n");
+        echo("graph_vlabel %\n");
+        echo("graph_scale no\n");
+        echo("graph_category network\n");
+
+        stdout["subnets"].forEach(function(subnet) {
+            var location = subnet["location"];
+            var range    = subnet["range"];
+            echo(location + '.label ' + location + ' (' + range + ')\n');
+            echo(location + '.warning 75\n');
+            echo(location + '.critical 90\n');
+        });
+    } else {
+        stdout["shared-networks"].forEach(function(network) {
+            var location = network["location"];
+            var used     = network["used"];
+            var defined  = network["defined"];
+            // keep 1 digit after decimal point
+            var percent  = Math.ceil(used * 100 / defined) / 10;
+            echo(location + '.value ' + percent + '\n');
+        });
+    }
+
+});

contrib/munin_plugins/dhcpstats_percent.php

@@ -0,0 +1,42 @@
+#!/usr/bin/env php
+<?php
+error_reporting(E_ALL);
+ini_set("display_errors", true);
+
+//$xml = file_get_contents("test.xml");
+$ret="";
+$xml = exec("dhcpd-pools --format x --sort n", $ret);
+$xml = join($ret);
+
+$xml = new SimpleXMLElement($xml);
+
+
+if ($argc>1 && $argv[1]=="autoconf") {
+    echo "yes\n";
+    return;
+} elseif ($argc>1 && $argv[1]=="config") {
+    $xml2 = $xml->xpath("subnet");
+    echo "graph_title dhcp usage (in percent)\n";
+    echo "graph_args --upper-limit 100 -l 0 --rigid\n";
+    echo "graph_vlabel %\n";
+    echo "graph_scale no\n";
+    echo "graph_category network\n";
+    foreach ($xml2 as $xml3) {
+        $location = (string) $xml3->location;
+	$range    = (string) $xml3->range;
+        echo "$location.label $location ($range)\n";
+        echo "$location.warning 75\n";
+        echo "$location.critical 90\n";
+    }
+} else {
+    $xml2 = $xml->xpath("shared-network");
+    foreach ($xml2 as $xml3) {
+        $location = (string) $xml3->location;
+        $used     = (int) $xml3->used;
+        $defined  = (int) $xml3->defined;
+        // keep 1 digit after decimal point
+        $pourcent = ceil($used*1000/$defined)/10;
+        echo "$location.value $pourcent\n";
+    }
+}
+