From e1ceb050e19c7574bca146a8da7047ee4ff456b5 Mon Sep 17 00:00:00 2001
From: Marius Burkard <m.burkard@pixcept.de>
Date: Sun, 10 Jul 2016 05:02:35 -0400
Subject: [PATCH] Merge branch 'stable-3.1'

---
 server/mods-available/rescue_core_module.inc.php |   90 +++++++++++++++++++++++++++-----------------
 1 files changed, 55 insertions(+), 35 deletions(-)

diff --git a/server/mods-available/rescue_core_module.inc.php b/server/mods-available/rescue_core_module.inc.php
index f1b25bd..5e8f3db 100644
--- a/server/mods-available/rescue_core_module.inc.php
+++ b/server/mods-available/rescue_core_module.inc.php
@@ -38,9 +38,13 @@
 	 * The monitoring-Data of this module.
 	 * [0] are the actual data, [1] are the data 1 minnute ago [2] are teh data 2 minuntes...
 	 */
+
+
 	private $_monitoringData = array();
+
 	/** The rescue-Data of this module. */
 	private $_rescueData = array();
+
 
 	/**
 	 *  This function is called during ispconfig installation to determine
@@ -50,12 +54,14 @@
 		return true;
 	}
 
+
 	/**
 	 * This function is called when the module is loaded
 	 */
 	function onLoad() {
 		$this->_doRescue();
 	}
+
 
 	/**
 	 * This function is called when a change in one of the registered tables is detected.
@@ -74,7 +80,7 @@
 		 */
 		global $conf;
 		if ((!isset($conf['serverconfig']['rescue']['try_rescue'])) ||
-				((isset($conf['serverconfig']['rescue']['try_rescue'])) && ($conf['serverconfig']['rescue']['try_rescue'] !='y'))){
+			((isset($conf['serverconfig']['rescue']['try_rescue'])) && ($conf['serverconfig']['rescue']['try_rescue'] !='y'))){
 			return;
 		}
 
@@ -91,7 +97,7 @@
 		/*
 		 * rescue MongoDB if needed
 		 */
-		$this->_rescueMongoDB();
+//		$this->_rescueMongoDB();
 
 		/*
 		 * rescue mysql if needed (maybe httpd depends on mysql, so try this first!)
@@ -250,7 +256,7 @@
 		 * This means, we check the data 1 minute ago
 		 */
 		if ((!isset($this->_monitoringData[1][0]['data']['webserver'])) ||
-				((isset($this->_monitoringData[1][0]['data']['webserver'])) && ($this->_monitoringData[1][0]['data']['webserver'] != 0))){
+			((isset($this->_monitoringData[1][0]['data']['webserver'])) && ($this->_monitoringData[1][0]['data']['webserver'] != 0))){
 			/*
 			 * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago.
 			 * This means, it could be, that the admin is restarting the server.
@@ -269,6 +275,17 @@
 
 		/* Set the new try counter */
 		$this->_rescueData['webserver']['try_counter'] = $tryCount;
+		
+		if ($tryCount > 2 && $conf['serverconfig']['web']['server_type'] != 'nginx') {
+			if($app->system->is_user('apache')) {
+				$app->log("Clearing semaphores table for user apache.",LOGLEVEL_WARN);
+				exec("ipcs -s | grep apache | awk '{ print $2 }' | xargs ipcrm sem");
+			}
+			if($app->system->is_user('www-data')) {
+				$app->log("Clearing semaphores table for user apache.",LOGLEVEL_WARN);
+				exec("ipcs -s | grep www-data | awk '{ print $2 }' | xargs ipcrm sem");
+			}
+		}
 
 		/* if 5 times will not work, we have to give up... */
 		if ($tryCount > 5){
@@ -294,42 +311,43 @@
 		$this->_rescueDaemon($daemon);
 	}
 
+
 	/**
 	 * restarts MongoDB, if needed
 	 */
-	private function _rescueMongoDB(){
-		global $app, $conf;
+//	private function _rescueMongoDB(){
+//		global $app, $conf;
 
 		/*
 		 * do nothing, if it is not allowed to rescue mysql
 		 */
-		if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) == 'y')){
-			return;
-		}
+//		if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) == 'y')){
+//			return;
+//		}
 
 		/*
 		 * if the service is up and running, or the service is not installed there is nothing to do...
 		 */
-		if ($this->_monitoringData[0][0]['data']['mongodbserver'] != 0){
-			/* Clear the try counter, because we do not have to try to rescue the service */
-			$this->_rescueData['mongodbserver']['try_counter'] = 0;
-			return;
-		}
+//		if ($this->_monitoringData[0][0]['data']['mongodbserver'] != 0){
+//			/* Clear the try counter, because we do not have to try to rescue the service */
+//			$this->_rescueData['mongodbserver']['try_counter'] = 0;
+//			return;
+//		}
 
 		/*
 		 * OK, the service is installed and down.
 		 * Maybe this is because of a restart of the service by the admin.
 		 * This means, we check the data 1 minute ago
 		 */
-		if ((!isset($this->_monitoringData[1][0]['data']['mongodbserver'])) ||
-				((isset($this->_monitoringData[1][0]['data']['mongodbserver'])) && ($this->_monitoringData[1][0]['data']['mongodbserver'] != 0))){
+//		if ((!isset($this->_monitoringData[1][0]['data']['mongodbserver'])) ||
+//			((isset($this->_monitoringData[1][0]['data']['mongodbserver'])) && ($this->_monitoringData[1][0]['data']['mongodbserver'] != 0))){
 			/*
 			 * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago.
 			 * This means, it could be, that the admin is restarting the server.
 			 * We wait one more minute...
 			 */
-			return;
-		}
+//			return;
+//		}
 
 		/*#####
 		 * The service is down and it was down 1 minute ago.
@@ -337,28 +355,28 @@
 		 *#####*/
 
 		/* Get the try counter */
-		$tryCount = (!isset($this->_rescueData['mongodbserver']['try_counter']))? 1 : $this->_rescueData['mongodbserver']['try_counter'] + 1;
+//		$tryCount = (!isset($this->_rescueData['mongodbserver']['try_counter']))? 1 : $this->_rescueData['mongodbserver']['try_counter'] + 1;
 
 		/* Set the new try counter */
-		$this->_rescueData['mongodbserver']['try_counter'] = $tryCount;
+//		$this->_rescueData['mongodbserver']['try_counter'] = $tryCount;
 
 		/* if 5 times will not work, we have to give up... */
-		if ($tryCount > 5){
-			$app->log('MongoDB is down! Rescue will not help!', LOGLEVEL_ERROR);
-			return;
-		}
+//		if ($tryCount > 5){
+//			$app->log('MongoDB is down! Rescue will not help!', LOGLEVEL_ERROR);
+//			return;
+//		}
 
 
-		$app->log('MongoDB is down! Try rescue MongoDB (try:' . $tryCount . ')...', LOGLEVEL_WARN);
+//		$app->log('MongoDB is down! Try rescue MongoDB (try:' . $tryCount . ')...', LOGLEVEL_WARN);
 
-		if(is_file($conf['init_scripts'] . '/' . 'mongodb')) {
-			$daemon = 'mongodb';
-		} else {
-			$daemon = 'mongodb';
-		}
+//		if(is_file($conf['init_scripts'] . '/' . 'mongodb')) {
+//			$daemon = 'mongodb';
+//		} else {
+//			$daemon = 'mongodb';
+//		}
 
-		$this->_rescueDaemon($daemon);
-	}
+//		$this->_rescueDaemon($daemon);
+//	}
 
 	/**
 	 * restarts mysql, if needed
@@ -388,7 +406,7 @@
 		 * This means, we check the data 1 minute ago
 		 */
 		if ((!isset($this->_monitoringData[1][0]['data']['mysqlserver'])) ||
-				((isset($this->_monitoringData[1][0]['data']['mysqlserver'])) && ($this->_monitoringData[1][0]['data']['mysqlserver'] != 0))){
+			((isset($this->_monitoringData[1][0]['data']['mysqlserver'])) && ($this->_monitoringData[1][0]['data']['mysqlserver'] != 0))){
 			/*
 			 * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago.
 			 * This means, it could be, that the admin is restarting the server.
@@ -432,8 +450,8 @@
 	 * @param type $daemon the name of the daemon
 	 */
 	private function _rescueDaemon($daemon){
-		global $conf;
-		
+		global $app, $conf;
+
 		$app->uses('system');
 		// if you need to find all restarts search for "['init_scripts']"
 		/*
@@ -447,7 +465,7 @@
 		 * of the service
 		 */
 		exec($app->system->getinitcommand($daemon, 'stop').' && (sleep 3; kill $!; sleep 2; kill -9 $!) &> /dev/null');
-		
+
 		/*
 		 * OK, we tryed to stop it normally, maybe this worked maybe not. So we have to look
 		 * if the service is already running or not. If so, we have to kill them hard
@@ -459,5 +477,7 @@
 		 */
 		exec($app->system->getinitcommand($daemon, 'start'));
 	}
+
 }
+
 ?>

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