librenms-librenms/includes/html/pages/device/apps/drbd.inc.php

<?php

echo '<h2>' . $app['app_instance'] . '</h2>';

$graphs = [
    'drbd_network_bits' => 'Network Traffic',
    'drbd_disk_bits'    => 'Disk Traffic',
    'drbd_unsynced'     => 'Unsynced Data',
    'drbd_queue'        => 'Queues',
];

foreach ($graphs as $key => $text) {
    $graph_array['height'] = '100';
    $graph_array['width'] = '215';
    $graph_array['to'] = \LibreNMS\Config::get('time.now');
    $graph_array['id'] = $app['app_id'];
    $graph_array['type'] = 'application_' . $key;

    echo '<div class="panel panel-default">
    <div class="panel-heading">
        <h3 class="panel-title">' . $text . '</h3>
    </div>
    <div class="panel-body">
    <div class="row">';
    include 'includes/html/print-graphrow.inc.php';
    echo '</div>';
    echo '</div>';
    echo '</div>';
}