app-os-updates initial release

doc/Extensions/Applications.md

@@ -10,6 +10,8 @@ Different applications support a variety of ways collect data: by direct connect
 4. [PowerDNS](#powerdns) - Agent
 5. [PowerDNS Recursor](#powerdns-recursor) - Agent
 6. [TinyDNS/djbdns](#tinydns-aka-djbdns) - Agent
+7. [OS Updates](#os-updates) - extend SNMP
+
 
 * [Agent Setup](#agent-setup)
 
@@ -121,6 +123,19 @@ chown dnslog:nofiles /service/dns/log/main/tinystats
 3. Restart TinyDNS and Daemontools: `/etc/init.d/svscan restart`
    _Note_: Some say `svc -t /service/dns` is enough, on my install (Gentoo) it doesn't rehook the logging and I'm forced to restart it entirely.
 
+### OS Updates 
+A small shell script that checks your system package manager for any available updates (supports yum/apt/zypper package managers).
+
+##### Extend SNMP
+1. Copy the shell script to the desired host (the host must be added to LibreNMS devices)
+2. Make the script executable (chmod +x /opt/os-updates.sh)
+3. Edit your snmpd.conf file (usually /etc/snmp/snmpd.conf) and add:
+```
+extend osupdate /opt/os-updates.sh
+```
+4. Restart snmpd on your host
+5. On the device page in Librenms, edit your host and check the `OS Updates` under the Applications tab.
+
 
 Agent Setup
 -----------

html/includes/graphs/application/os-updates.inc.php

@@ -0,0 +1,36 @@
+<?php
+require 'includes/graphs/common.inc.php';
+$name = 'os-updates';
+$app_id = $app['app_id'];
+$scale_min     = 0;
+$colours       = 'mixed';
+$unit_text     = 'Available updates';
+$unitlen       = 18;
+$bigdescrlen   = 18;
+$smalldescrlen = 18;
+$dostack       = 0;
+$printtotal    = 0;
+$addarea       = 1;
+$transparency  = 33;
+
+$rrd_filename = rrd_name($device['hostname'], array('app', $name, $app_id));
+
+$array = array(
+    'packages' => array('descr' => 'packages','colour' => '2B9220',),
+);
+
+$i = 0;
+if (is_file($rrd_filename)) {
+    foreach ($array as $ds => $vars) {
+        $rrd_list[$i]['filename'] = $rrd_filename;
+        $rrd_list[$i]['descr']    = $vars['descr'];
+        $rrd_list[$i]['ds']       = $ds;
+        $rrd_list[$i]['colour']   = $vars['colour'];
+        $i++;
+    }
+}
+else {
+    echo "file missing: $rrd_filename";
+}
+
+require 'includes/graphs/generic_v3_multiline.inc.php';

html/pages/device/apps/os-updates.inc.php

@@ -0,0 +1,28 @@
+<?php
+
+global $config;
+
+$graphs = array(
+    'os-updates' => 'OS updates',
+);
+
+foreach ($graphs as $key => $text) {
+    $graph_type            = $key;
+    $graph_array['height'] = '100';
+    $graph_array['width']  = '215';
+    $graph_array['to']     = $config['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/print-graphrow.inc.php';
+    echo '</div>';
+    echo '</div>';
+    echo '</div>';
+}
+

includes/polling/applications/os-updates.inc.php

@@ -0,0 +1,18 @@
+<?php
+$name = 'os-updates';
+$app_id = $app['app_id'];
+$options = '-O qv';
+$mib = 'NET-SNMP-EXTEND-MIB';
+$oid = '.1.3.6.1.4.1.8072.1.3.2.4.1.2.8.111.115.117.112.100.97.116.101.1';
+
+$rrd_name = array('app', $name, $app_id);
+$rrd_def = array(
+    'DS:packages:GAUGE:600:0:U',
+);
+
+$osupdates = snmp_get($device, $oid, $options, $mib);
+
+$fields = array('packages' => $osupdates,);
+
+$tags = array('name' => $name, 'app_id' => $app_id, 'rrd_def' => $rrd_def, 'rrd_name' => $rrd_name);
+data_update($device, 'app', $tags, $fields);