add graph for new log entries

plugins/moodle/moodle_logs.php

@@ -0,0 +1,62 @@
+#!/usr/bin/php
+<?php
+/**
+ * Moodle Logs
+ * Munin plugin to count logs entries
+ *
+ * It's required to define a container entry for this plugin in your
+ * /etc/munin/plugin-conf.d/munin-node (or a separate and dedicated file).
+ *
+ * @example Example entry for configuration:
+ * [moodle*]
+ * env.type mysql
+ * env.db moodle
+ * env.user mysql_user
+ * env.pass mysql_pass
+ * env.host localhost
+ * env.port 3306
+ * env.table_prefix mdl_
+ *
+ * @author Arnaud Trouvé <ak4t0sh@free.fr>
+ * @version 1.0 2014
+ *
+ */
+$dbh = null;
+$db = getenv('db');
+$type = getenv('type');
+$host = getenv('host');
+$user = getenv('user');
+$pass = getenv('pass');
+$table_prefix = getenv('table_prefix');
+$port = getenv('port');
+if (!$port)
+    $port = 3306;
+//$graph_period = getenv('graph_period');
+$graph_period = time() - 5*60;
+
+if (count($argv) === 2 && $argv[1] === 'config') {
+    echo "graph_title Moodle Logs\n";
+    echo "graph_args --base 1000 --lower-limit 0\n";
+    echo "graph_vlabel logs\n";
+    echo "graph_category Moodle\n";
+    echo "graph_scale no\n";
+    echo "graph_info Displays the number of new logs written\n";
+    echo "logs.label logs\n";
+    echo "logs.min 0\n";
+    exit(0);
+}
+
+try {
+    $dsn = $type . ':host=' . $host . ';port=' . $port . ';dbname=' . $db;
+    $dbh = new PDO($dsn, $user, $pass);
+} catch (Exception $e) {
+    echo "Connection failed\n";
+    exit(1);
+}
+
+//Online users
+$nb = 0;
+if (($stmt = $dbh->query("SELECT count(id) FROM {$table_prefix}log WHERE time > $graph_period")) != false) {
+    $nbusers = $stmt->fetchColumn();
+}
+echo "logs.value $nb\n";