Munin contributed plugins

#!/usr/bin/php

<?php

/**

 * Moodle module chat

 * Munin plugin to count users in chat sessions

 *

 * It's required to define a container entry for this plugin in your

 * /etc/munin/plugin-conf.d/moodle.conf

 *

 * @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 = time() - 5*60;

if (count($argv) === 2 && $argv[1] === 'config') {

    echo "graph_title Moodle Chat Users\n";

    echo "graph_args --base 1000 --lower-limit 0\n";

    echo "graph_vlabel users\n";

    echo "graph_category cms\n";

    echo "graph_scale no\n";

    echo "graph_info Displays the number of users connected and posting message in chat sessions\n";

    echo "chat_users_connected.label users connected\n";

    echo "chat_users_connected.min 0\n";

    echo "chat_users_active.label users posting messages\n";

    echo "chat_users_active.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);

}

//Connected

$nb=0;

if (($stmt = $dbh->query("SELECT COUNT(DISTINCT userid) FROM {$table_prefix}chat_users WHERE lastping > $graph_period")) != false) {

    $nb = $stmt->fetchColumn();

}

echo "chat_users_connected.value $nb\n";

//Active

$nb=0;

if (($stmt = $dbh->query("SELECT COUNT(DISTINCT userid) FROM {$table_prefix}chat_users WHERE lastmessageping > $graph_period")) != false) {

    $nb = $stmt->fetchColumn();

}

echo "chat_users_active.value $nb\n";