mirror of
https://github.com/stylersnico/librenms.git
synced 2026-07-28 08:02:41 +02:00
Added Alerting
This commit is contained in:
f0o
+141
-102
@@ -1,112 +1,151 @@
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<?php
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/* Copyright (C) 2014 Daniel Preussker <f0o@devilcode.org>
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/**
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* Observium Network Management and Monitoring System
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* Copyright (C) 2006-2012, Adam Armstrong - http://www.observium.org
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*
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* @package alerting
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* @author Adam Armstrong <adama@memetic.org>
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*
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* Alerts Tracking
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* @author Daniel Preussker <f0o@devilcode.org>
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* @copyright 2014 f0o, LibreNMS
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* @license GPL
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* @package LibreNMS
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* @subpackage Alerts
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*/
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/**
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* Generate SQL from Rule
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* @param string $rule Rule to generate SQL for
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* @return string
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*/
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function GenSQL($rule) {
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$tmp = explode(" ",$rule);
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$tables = array();
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foreach( $tmp as $opt ) {
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if( strstr($opt,'%') && strstr($opt,'.') ) {
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$tmpp = explode(".",$opt,2);
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$tmpp[0] = str_replace("%","",$tmpp[0]);
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$tables[] = mres($tmpp[0]);
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$rule = str_replace($opt,$tmpp[0].'.'.$tmpp[1],$rule);
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}
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}
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$tables = array_unique($tables);
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$x = sizeof($tables);
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$i = 0;
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$join = "";
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while( $i < $x ) {
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if( isset($tables[$i+1]) ) {
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$join .= $tables[$i].".device_id = ".$tables[$i+1].".device_id && ";
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}
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$i++;
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}
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$sql = "SELECT * FROM ".implode(",",$tables)." WHERE (".$join."".$tables[0].".device_id = ?) && (".str_replace(array("*","!~","~"),array("%","NOT LIKE","LIKE"),$rule).")";
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return $sql;
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}
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/**
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* Build a cache of default alert conditions
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*
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* Run all rules for a device
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* @param int $device Device-ID
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* @return void
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*/
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function RunRules($device) {
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global $debug;
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$chk = dbFetchRow("SELECT id FROM alert_schedule WHERE alert_schedule.device_id = ? AND NOW() BETWEEN alert_schedule.start AND alert_schedule.end", array($device));
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if( $chk['id'] > 0 ) {
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return false;
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}
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foreach( dbFetchRows("SELECT * FROM alert_rules WHERE alert_rules.disabled = 0 && ( alert_rules.device_id = -1 || alert_rules.device_id = ? ) ORDER BY device_id,id",array($device)) as $rule ) {
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echo " #".$rule['id'].":";
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$chk = dbFetchRow("SELECT state FROM alerts WHERE rule_id = ? && device_id = ? ORDER BY id DESC LIMIT 1", array($rule['id'], $device));
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$sql = GenSQL($rule['rule']);
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$qry = dbFetchRows($sql,array($device));
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if( sizeof($qry) > 0 ) {
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if( $chk['state'] === "2" ) {
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echo " SKIP ";
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} elseif( $chk['state'] === "1" ) {
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echo " NOCHG ";
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} else {
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$extra = gzcompress(json_encode(array('contacts' => GetContacts($qry), 'rule'=>$qry)),9);
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if( dbInsert(array('state' => 1, 'device_id' => $device, 'rule_id' => $rule['id'], 'details' => $extra),'alert_log') ) {
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if( !dbUpdate(array('state' => 1, 'open' => 1),'alerts','device_id = ? && rule_id = ?', array($device,$rule['id'])) ) {
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dbInsert(array('state' => 1, 'device_id' => $device, 'rule_id' => $rule['id'], 'open' => 1),'alerts');
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}
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echo " ALERT ";
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}
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}
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} else {
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if( $chk['state'] === "0" ) {
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echo " NOCHG ";
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} else {
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if( dbInsert(array('state' => 0, 'device_id' => $device, 'rule_id' => $rule['id']),'alert_log') ){
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if( !dbUpdate(array('state' => 0, 'open' => 1),'alerts','device_id = ? && rule_id = ?', array($device,$rule['id'])) ) {
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dbInsert(array('state' => 0, 'device_id' => $device, 'rule_id' => $rule['id'], 'open' => 1),'alerts');
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}
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echo " OK ";
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}
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}
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}
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}
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}
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/**
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* Find contacts for alert
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* @param array $results Rule-Result
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* @return array
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*/
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function cache_conditions_global() {
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$cache = array();
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foreach (dbFetchRows("SELECT * FROM `alert_conditions_global`") as $entry)
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{
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$cache[$entry['type']][$entry['subtype']][$entry['metric']][] = array('operator' => $entry['operator'], 'value' => $entry['value'],
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'severity' => $entry['severity'], 'alerter' => $entry['alerter'], 'enable' => $entry['enable']);
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}
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return $cache;
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*/
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function GetContacts($results) {
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global $config;
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if( sizeof($results) == 0 ) {
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return array();
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}
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$contacts = array();
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$uids = array();
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foreach( $results as $result ) {
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$tmpa = array();
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$tmp = NULL;
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if( is_numeric($result["port_id"]) ) {
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$tmpa = dbFetchRows("SELECT user_id FROM ports_perms WHERE access_level >= 0 AND port_id = ?",array($result["port_id"]));
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foreach( $tmpa as $tmp ) {
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$uids[$tmp['user_id']] = $tmp['user_id'];
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}
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}
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if( is_numeric($result["device_id"]) ) {
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$tmpa = dbFetchRow("SELECT sysContact FROM devices WHERE device_id = ?",array($result["device_id"]));
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$contacts[$tmpa["sysContact"]] = "NOC";
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$tmpa = dbFetchRows("SELECT user_id FROM devices_perms WHERE access_level >= 0 AND device_id = ?", array($result["device_id"]));
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foreach( $tmpa as $tmp ) {
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$uids[$tmp['user_id']] = $tmp['user_id'];
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}
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}
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}
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if( $config["alert"]["globals"] ) {
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$tmpa = dbFetchRows("SELECT realname,email FROM users WHERE level >= 5 AND level < 10");
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foreach( $tmpa as $tmp ) {
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$contacts[$tmp['email']] = $tmp['realname'];
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}
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}
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if( $config["alert"]["admins"] ) {
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$tmpa = dbFetchRows("SELECT realname,email FROM users WHERE level = 10");
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foreach( $tmpa as $tmp ) {
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$contacts[$tmp['email']] = $tmp['realname'];
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}
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}
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if( is_array($uids) ) {
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foreach( $uids as $uid ) {
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$tmp = dbFetchRow("SELECT realname,email FROM users WHERE user_id = ?", array($uid));
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$contacts[$tmp['email']] = $tmp['realname'];
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}
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}
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return $contacts;
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}
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/**
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* Build a cache of device-specific alert conditions
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*
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* @return array
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* @param device_id
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*/
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function cache_conditions_device($device_id) {
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$cache = array();
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foreach (dbFetchRows("SELECT * FROM `alert_conditions` WHERE `device_id` = ?", array($device_id)) as $entry)
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{
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$cache[$entry['type']][$entry['subtype']][$entry['entity']][$entry['metric']][] = array('condition' => $entry['operator'], 'value' => $entry['value'],
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'severity' => $entry['severity'], 'alerter' => $entry['alerter'],
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'enable' => $entry['enable']);
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}
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return $cache;
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}
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/**
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* Compare two values
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*
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* @return integer
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* @param value_a
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* @param condition
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* @param value_b
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*/
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function test_condition($value_a, $condition, $value_b)
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{
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switch($condition)
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{
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case ">":
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if($value_a > $value_b) { $alert = 1; } else { $alert = 0; }
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break;
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case "<":
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if($value_a < $value_b) { $alert = 1; } else { $alert = 0; }
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break;
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case "!=":
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if($value_a != $value_b) { $alert = 1; } else { $alert = 0; }
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break;
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case "=":
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if($value_a = $value_b) { $alert = 1; } else { $alert = 0; }
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break;
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default:
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$alert = -1;
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break;
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}
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return $alert;
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}
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/**
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* Check entity data against alert conditions
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*
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* @param value_a
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* @param condition
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* @param value_b
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*/
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function check_entity($device, $entity_type, $entity_id, $data)
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{
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global $glo_conditions;
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global $dev_conditions;
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if(!empty($entity_id)) { echo(" $entity_id"); }
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foreach($data as $name => $value)
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{
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foreach($dev_conditions[$entity_type][$entity_id][$name] as $condition)
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{
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$alert = test_condition($value, $condition['condition'], $condition['value']);
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if($alert == 1)
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{
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echo("ALERT ");
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} else {
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echo("OK ");
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}
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}
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}
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}
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?>
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