<?php
/**
* @brief Server Monitoring Task
* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
* @copyright (c) Invision Power Services, Inc.
* @license https://www.invisioncommunity.com/legal/standards/
* @package Invision Community
* @subpackage Nexus
* @since 07 Aug 2014
*/
namespace IPS\nexus\tasks;
/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
exit;
}
/**
* Server Monitoring Task
*/
class _monitor extends \IPS\Task
{
/**
* Execute
*
* If ran successfully, should return anything worth logging. Only log something
* worth mentioning (don't log "task ran successfully"). Return NULL (actual NULL, not '' or 0) to not log (which will be most cases).
* If an error occurs which means the task could not finish running, throw an \IPS\Task\Exception - do not log an error as a normal log.
* Tasks should execute within the time of a normal HTTP request.
*
* @return mixed Message to log or NULL
* @throws \IPS\Task\Exception
*/
public function execute()
{
if ( \IPS\Settings::i()->monitoring_script )
{
/* Init */
$url = \IPS\Http\Url::external( \IPS\Settings::i()->monitoring_script )->setQueryString( 'notify', base64_encode( \IPS\Settings::i()->monitoring_alert ) );
if ( \IPS\Settings::i()->monitoring_backup )
{
$backupUrl = \IPS\Http\Url::external( \IPS\Settings::i()->monitoring_backup )->setQueryString( 'notify', base64_encode( \IPS\Settings::i()->monitoring_alert ) );
}
/* Loop Servers */
foreach ( new \IPS\Patterns\ActiveRecordIterator( \IPS\Db::i()->select( '*', 'nexus_hosting_servers', "server_monitor<>'' AND server_monitor_acknowledged=0" ), 'IPS\nexus\Hosting\Server' ) as $server )
{
/* Make the call */
$response = NULL;
try
{
$response = $url->setQueryString( 'check', $server->monitor )->request()->get();
if ( $response == 'FAIL' or mb_strstr( $response, 'SUCCESS' ) === FALSE and \IPS\Settings::i()->monitoring_backup )
{
throw new \IPS\Http\Request\Exception;
}
}
catch ( \IPS\Http\Request\Exception $e )
{
if ( \IPS\Settings::i()->monitoring_backup )
{
try
{
$response = $backupUrl->setQueryString( 'check', $server->monitor )->request()->get();
}
catch ( \IPS\Http\Request\Exception $e ) { }
}
}
/* If it's online... */
if ( $response and $response != 'FAIL' and mb_strstr( $response, 'SUCCESS' ) !== FALSE )
{
$exploded = explode( "\n", $response );
/* If we previously sent an offline email, we can now send a "back online" one */
if ( $server->monitor_fails > \IPS\Settings::i()->monitoring_allowed_fails )
{
$server->monitoringOnline( $exploded[1] );
}
/* Update Server */
$server->monitor_fails = 0;
$server->monitor_acknowledged = 0;
$server->monitor_last_sucess = time();
$server->monitor_version = $exploded[1];
$server->save();
}
/* If it's offline... */
else
{
$server->monitor_fails++;
$server->save();
if ( $server->monitor_fails == ( intval( \IPS\Settings::i()->monitoring_allowed_fails ) + 1 ) )
{
$server->monitoringOffline();
}
elseif ( $server->monitor_fails == intval( \IPS\Settings::i()->monitoring_panic ) and !$server->monitor_acknowledged )
{
$server->monitoringPanic();
}
}
}
}
else
{
\IPS\Db::i()->update( 'core_tasks', array( 'enabled' => 0 ), array( '`key`=?', 'monitor' ) );
}
return NULL;
}
/**
* Cleanup
*
* If your task takes longer than 15 minutes to run, this method
* will be called before execute(). Use it to clean up anything which
* may not have been done
*
* @return void
*/
public function cleanup()
{
}
}