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113 lines
2.7 KiB
PHP
113 lines
2.7 KiB
PHP
<?php
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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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*/
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/**
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* Build a cache of default alert conditions
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*
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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 $cache;
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}
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/**
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* Build a cache of device-specific alert conditions
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*
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* @return array
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* @param device_id
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*/
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function cache_conditions_device($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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