commit | author | age
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dead5c
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<?php |
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/* |
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Copyright (c) 2007-2011, Till Brehm, projektfarm Gmbh and Oliver Vogel www.muv.com |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without modification, |
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are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright notice, |
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this list of conditions and the following disclaimer in the documentation |
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and/or other materials provided with the distribution. |
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* Neither the name of ISPConfig nor the names of its contributors |
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may be used to endorse or promote products derived from this software without |
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specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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class rescue_core_module { |
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var $module_name = 'rescue_core_module'; |
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var $class_name = 'rescue_core_module'; |
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/* No actions at this time. maybe later... */ |
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var $actions_available = array(); |
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/** |
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* The monitoring-Data of this module. |
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* [0] are the actual data, [1] are the data 1 minnute ago [2] are teh data 2 minuntes... |
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*/ |
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private $_monitoringData = array(); |
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/** The rescue-Data of this module. */ |
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private $_rescueData = array(); |
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dead5c
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/** |
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* This function is called during ispconfig installation to determine |
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* if a symlink shall be created for this plugin. |
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*/ |
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function onInstall() { |
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return true; |
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} |
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dead5c
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/** |
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* This function is called when the module is loaded |
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*/ |
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function onLoad() { |
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$this->_doRescue(); |
dead5c
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} |
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dead5c
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/** |
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* This function is called when a change in one of the registered tables is detected. |
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* The function then raises the events for the plugins. |
dead5c
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*/ |
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function process($tablename, $action, $data) { |
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// not needed |
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} |
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/** |
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* This Method tries to rescue the server if a service is down. |
dead5c
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*/ |
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private function _doRescue() { |
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/* |
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* do nothing, if the rescue-system is not enabled |
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*/ |
dead5c
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global $conf; |
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if ((!isset($conf['serverconfig']['rescue']['try_rescue'])) || |
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((isset($conf['serverconfig']['rescue']['try_rescue'])) && ($conf['serverconfig']['rescue']['try_rescue'] !='y'))){ |
dead5c
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return; |
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} |
dead5c
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/* |
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* First we get the monitoring data needed for rescuing the system |
dead5c
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*/ |
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$this->_monitoringData = $this->_getMonitoringData(); |
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/* |
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* Next we get the rescue data needed for rescuing the system |
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*/ |
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$this->_rescueData = $this->_getRescueData(); |
05beae
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/* |
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* rescue MongoDB if needed |
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*/ |
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// $this->_rescueMongoDB(); |
05beae
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4ebc7d
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/* |
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* rescue mysql if needed (maybe httpd depends on mysql, so try this first!) |
039b46
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*/ |
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$this->_rescueMySql(); |
05beae
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/* |
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* rescue httpd if needed |
4ebc7d
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*/ |
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$this->_rescueHttpd(); |
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/* |
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* The last step is to save the rescue-data |
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*/ |
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$this->_saveRescueData(); |
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} |
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/** |
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* This gets the Monitoring-Data, needed for rescuing the system. |
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* Because we can not be 100% sure, that the mysql-DB is up and running, so we use the |
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* file-system (this is no problem, because this module is the only one using this data, |
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* so we do not have parallel access. |
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*/ |
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private function _getMonitoringData() { |
dead5c
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global $app; |
05beae
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$dataFilename = dirname(__FILE__) . "/../temp/rescue_module_monitoringdata.ser.txt"; |
05beae
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4ebc7d
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/* |
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* If the file containing the data is too old (older than 5 minutes) it is better to |
05beae
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* delete it, because it could be, that the server was down for some times and so the data |
4ebc7d
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* are outdated |
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*/ |
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if (file_exists($dataFilename) && (filemtime($dataFilename) < (time() - 5 * 60))) { |
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unlink($dataFilename); |
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} |
dead5c
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4ebc7d
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/* |
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* Get the monitoring-data |
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*/ |
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if (file_exists($dataFilename)) { |
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$data = unserialize(file_get_contents($dataFilename)); |
dead5c
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} else { |
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$data = array(); |
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} |
05beae
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/* |
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* $temp[0] was the data of the last monitoring (means 1 minute ago), $temp[1] is the data |
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* 2 minutes ago and so on. Now we have make place for the newest data... |
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*/ |
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$max = sizeof($data); |
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if ($max > 10){ |
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$max = 10; // not more than 10 histories |
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} |
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for ($i = $max; $i > 0; $i--){ |
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$data[$i] = $data[$i -1]; |
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} |
05beae
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4ebc7d
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/* |
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* we need the monitoring tools |
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*/ |
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$app->load('monitor_tools'); |
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$tools = new monitor_tools(); |
05beae
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/* |
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* Call the needed Monitoring-step and get the data |
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*/ |
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$tmp[0] = $tools->monitorServices(); |
05beae
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/* Add the data at the FIRST position of the history */ |
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$data[0] = $tmp; |
05beae
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4ebc7d
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/* |
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* We have the newest monitoring data. Save it! |
849624
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* (and protect it, because there may be sensible data in it) |
4ebc7d
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*/ |
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file_put_contents($dataFilename, serialize($data)); |
849624
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chmod($dataFilename, 0600); |
05beae
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/* Thats it */ |
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return $data; |
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} |
05beae
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4ebc7d
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/** |
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* This gets the rescue-Data, needed for rescuing the system. |
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* Because we can not be 100% sure, that the mysql-DB is up and running, so we use the |
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* file-system (this is no problem, because this module is the only one using this data, |
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* so we do not have parallel access. |
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*/ |
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private function _getRescueData() { |
686742
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$dataFilename = dirname(__FILE__) . "/../temp/rescue_module_rescuedata.ser.txt"; |
4ebc7d
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/* |
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* If the file containing the data is too old (older than 5 minutes) it is better to |
05beae
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* delete it, because it could be, that the server was down for some times and so the data |
4ebc7d
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* are outdated |
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*/ |
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if (file_exists($dataFilename) && (filemtime($dataFilename) < (time() - 5 * 60))) { |
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unlink($dataFilename); |
dead5c
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} |
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/* |
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* Get the rescue-data |
dead5c
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*/ |
4ebc7d
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if (file_exists($dataFilename)) { |
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$data = unserialize(file_get_contents($dataFilename)); |
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} else { |
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$data = array(); |
dead5c
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} |
05beae
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/* Thats it */ |
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return $data; |
dead5c
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} |
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/** |
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* Writes the rescue data to disk. |
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* Because we can not be 100% sure, that the mysql-DB is up and running, so we use the |
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* file-system (this is no problem, because this module is the only one using this data, |
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* so we do not have parallel access. |
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*/ |
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private function _saveRescueData() { |
686742
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$dataFilename = dirname(__FILE__) . "/../temp/rescue_module_rescuedata.ser.txt"; |
849624
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/* |
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* We have the newest data. Save it! |
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* (and protect it, because there may be sensible data in it) |
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*/ |
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file_put_contents($dataFilename, serialize($this->_rescueData)); |
849624
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chmod($dataFilename, 0600); |
4ebc7d
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} |
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/** |
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* restarts httpd, if needed |
4ebc7d
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*/ |
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private function _rescueHttpd(){ |
4ebc7d
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global $app, $conf; |
05beae
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|
dead5c
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/* |
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* do nothing, if it is not allowed to rescue httpd |
dead5c
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*/ |
8ab3cd
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if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_httpd']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_httpd']) == 'y')){ |
dead5c
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return; |
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} |
05beae
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4ebc7d
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/* |
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* if the service is up and running, or the service is not installed there is nothing to do... |
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*/ |
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if ($this->_monitoringData[0][0]['data']['webserver'] != 0){ |
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/* Clear the try counter, because we do not have to try to rescue the service */ |
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$this->_rescueData['webserver']['try_counter'] = 0; |
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return; |
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} |
05beae
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4ebc7d
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/* |
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* OK, the service is installed and down. |
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* Maybe this is because of a restart of the service by the admin. |
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* This means, we check the data 1 minute ago |
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*/ |
05beae
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if ((!isset($this->_monitoringData[1][0]['data']['webserver'])) || |
b1a6a5
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((isset($this->_monitoringData[1][0]['data']['webserver'])) && ($this->_monitoringData[1][0]['data']['webserver'] != 0))){ |
05beae
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/* |
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* We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. |
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* This means, it could be, that the admin is restarting the server. |
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* We wait one more minute... |
dead5c
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*/ |
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return; |
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} |
05beae
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4ebc7d
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/*##### |
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* The service is down and it was down 1 minute ago. |
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* We try to rescue it |
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*#####*/ |
05beae
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|
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/* Get the try counter */ |
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$tryCount = (!isset($this->_rescueData['webserver']['try_counter']))? 1 : $this->_rescueData['webserver']['try_counter'] + 1; |
05beae
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4ebc7d
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/* Set the new try counter */ |
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$this->_rescueData['webserver']['try_counter'] = $tryCount; |
355feb
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if ($tryCount > 2 && $conf['serverconfig']['web']['server_type'] != 'nginx') { |
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if($app->system->is_user('apache')) { |
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$app->log("Clearing semaphores table for user apache.",LOGLEVEL_WARN); |
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exec("ipcs -s | grep apache | awk '{ print $2 }' | xargs ipcrm sem"); |
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} |
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if($app->system->is_user('www-data')) { |
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$app->log("Clearing semaphores table for user apache.",LOGLEVEL_WARN); |
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exec("ipcs -s | grep www-data | awk '{ print $2 }' | xargs ipcrm sem"); |
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} |
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} |
05beae
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4ebc7d
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/* if 5 times will not work, we have to give up... */ |
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if ($tryCount > 5){ |
8ab3cd
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$app->log('httpd is down! Rescue will not help!', LOGLEVEL_ERROR); |
4ebc7d
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return; |
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} |
05beae
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MC |
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8ab3cd
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$app->log('httpd is down! Try rescue httpd (try:' . $tryCount . ')...', LOGLEVEL_WARN); |
05beae
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8ab3cd
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if($conf['serverconfig']['web']['server_type'] == 'nginx'){ |
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$daemon = 'nginx'; |
dead5c
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} else { |
8ab3cd
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if(is_file($conf['init_scripts'] . '/' . 'httpd')) { |
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$daemon = 'httpd'; |
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} elseif(is_file($conf['init_scripts'] . '/' . 'httpd2')){ |
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$daemon = 'httpd2'; |
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} else { |
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$daemon = 'apache2'; |
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} |
dead5c
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} |
05beae
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eed6b3
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$this->_rescueDaemon($daemon); |
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} |
05beae
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e7ae4e
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05beae
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/** |
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* restarts MongoDB, if needed |
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*/ |
e7ae4e
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// private function _rescueMongoDB(){ |
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// global $app, $conf; |
05beae
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MC |
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/* |
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* do nothing, if it is not allowed to rescue mysql |
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*/ |
e7ae4e
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// if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) == 'y')){ |
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// return; |
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// } |
05beae
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MC |
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/* |
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* if the service is up and running, or the service is not installed there is nothing to do... |
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*/ |
e7ae4e
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// if ($this->_monitoringData[0][0]['data']['mongodbserver'] != 0){ |
FS |
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// /* Clear the try counter, because we do not have to try to rescue the service */ |
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// $this->_rescueData['mongodbserver']['try_counter'] = 0; |
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// return; |
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// } |
05beae
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MC |
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/* |
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* OK, the service is installed and down. |
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* Maybe this is because of a restart of the service by the admin. |
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* This means, we check the data 1 minute ago |
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*/ |
e7ae4e
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// if ((!isset($this->_monitoringData[1][0]['data']['mongodbserver'])) || |
FS |
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// ((isset($this->_monitoringData[1][0]['data']['mongodbserver'])) && ($this->_monitoringData[1][0]['data']['mongodbserver'] != 0))){ |
05beae
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/* |
MC |
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* We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. |
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* This means, it could be, that the admin is restarting the server. |
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* We wait one more minute... |
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*/ |
e7ae4e
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// return; |
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// } |
05beae
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MC |
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/*##### |
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* The service is down and it was down 1 minute ago. |
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* We try to rescue it |
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*#####*/ |
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/* Get the try counter */ |
e7ae4e
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// $tryCount = (!isset($this->_rescueData['mongodbserver']['try_counter']))? 1 : $this->_rescueData['mongodbserver']['try_counter'] + 1; |
05beae
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MC |
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/* Set the new try counter */ |
e7ae4e
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// $this->_rescueData['mongodbserver']['try_counter'] = $tryCount; |
05beae
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MC |
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/* if 5 times will not work, we have to give up... */ |
e7ae4e
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// if ($tryCount > 5){ |
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// $app->log('MongoDB is down! Rescue will not help!', LOGLEVEL_ERROR); |
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// return; |
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// } |
05beae
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MC |
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e7ae4e
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// $app->log('MongoDB is down! Try rescue MongoDB (try:' . $tryCount . ')...', LOGLEVEL_WARN); |
05beae
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|
e7ae4e
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// if(is_file($conf['init_scripts'] . '/' . 'mongodb')) { |
FS |
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// $daemon = 'mongodb'; |
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// } else { |
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// $daemon = 'mongodb'; |
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// } |
05beae
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e7ae4e
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// $this->_rescueDaemon($daemon); |
FS |
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// } |
05beae
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|
eed6b3
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/** |
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* restarts mysql, if needed |
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*/ |
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private function _rescueMySql(){ |
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global $app, $conf; |
05beae
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|
eed6b3
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/* |
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* do nothing, if it is not allowed to rescue mysql |
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*/ |
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if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mysql']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mysql']) == 'y')){ |
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return; |
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} |
05beae
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|
eed6b3
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/* |
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* if the service is up and running, or the service is not installed there is nothing to do... |
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*/ |
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if ($this->_monitoringData[0][0]['data']['mysqlserver'] != 0){ |
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/* Clear the try counter, because we do not have to try to rescue the service */ |
|
399 |
$this->_rescueData['mysqlserver']['try_counter'] = 0; |
|
400 |
return; |
|
401 |
} |
05beae
|
402 |
|
eed6b3
|
403 |
/* |
V |
404 |
* OK, the service is installed and down. |
|
405 |
* Maybe this is because of a restart of the service by the admin. |
|
406 |
* This means, we check the data 1 minute ago |
|
407 |
*/ |
05beae
|
408 |
if ((!isset($this->_monitoringData[1][0]['data']['mysqlserver'])) || |
b1a6a5
|
409 |
((isset($this->_monitoringData[1][0]['data']['mysqlserver'])) && ($this->_monitoringData[1][0]['data']['mysqlserver'] != 0))){ |
05beae
|
410 |
/* |
MC |
411 |
* We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. |
|
412 |
* This means, it could be, that the admin is restarting the server. |
eed6b3
|
413 |
* We wait one more minute... |
V |
414 |
*/ |
|
415 |
return; |
|
416 |
} |
05beae
|
417 |
|
eed6b3
|
418 |
/*##### |
V |
419 |
* The service is down and it was down 1 minute ago. |
|
420 |
* We try to rescue it |
|
421 |
*#####*/ |
05beae
|
422 |
|
eed6b3
|
423 |
/* Get the try counter */ |
V |
424 |
$tryCount = (!isset($this->_rescueData['mysqlserver']['try_counter']))? 1 : $this->_rescueData['mysqlserver']['try_counter'] + 1; |
05beae
|
425 |
|
eed6b3
|
426 |
/* Set the new try counter */ |
V |
427 |
$this->_rescueData['mysqlserver']['try_counter'] = $tryCount; |
05beae
|
428 |
|
eed6b3
|
429 |
/* if 5 times will not work, we have to give up... */ |
V |
430 |
if ($tryCount > 5){ |
|
431 |
$app->log('MySQL is down! Rescue will not help!', LOGLEVEL_ERROR); |
|
432 |
return; |
|
433 |
} |
05beae
|
434 |
|
MC |
435 |
|
eed6b3
|
436 |
$app->log('MySQL is down! Try rescue mysql (try:' . $tryCount . ')...', LOGLEVEL_WARN); |
V |
437 |
|
|
438 |
if(is_file($conf['init_scripts'] . '/' . 'mysqld')) { |
|
439 |
$daemon = 'mysqld'; |
|
440 |
} else { |
|
441 |
$daemon = 'mysql'; |
|
442 |
} |
05beae
|
443 |
|
eed6b3
|
444 |
$this->_rescueDaemon($daemon); |
V |
445 |
} |
|
446 |
|
|
447 |
/** |
|
448 |
* Tries to stop and then restart the daemon |
05beae
|
449 |
* |
eed6b3
|
450 |
* @param type $daemon the name of the daemon |
V |
451 |
*/ |
|
452 |
private function _rescueDaemon($daemon){ |
a1e022
|
453 |
global $app, $conf; |
b1a6a5
|
454 |
|
33bcd0
|
455 |
$app->uses('system'); |
eed6b3
|
456 |
// if you need to find all restarts search for "['init_scripts']" |
V |
457 |
/* |
|
458 |
* First we stop the running service "normally" |
|
459 |
*/ |
05beae
|
460 |
|
dead5c
|
461 |
/* |
4ebc7d
|
462 |
* ATTENTION! |
V |
463 |
* The service hangs. this means it could be, that "stop" will hang also. |
|
464 |
* So we have to try to stop but if this will not work, we have to kill the stopping |
|
465 |
* of the service |
dead5c
|
466 |
*/ |
33bcd0
|
467 |
exec($app->system->getinitcommand($daemon, 'stop').' && (sleep 3; kill $!; sleep 2; kill -9 $!) &> /dev/null'); |
b1a6a5
|
468 |
|
4ebc7d
|
469 |
/* |
V |
470 |
* OK, we tryed to stop it normally, maybe this worked maybe not. So we have to look |
|
471 |
* if the service is already running or not. If so, we have to kill them hard |
|
472 |
*/ |
|
473 |
exec("kill -9 `ps -A | grep " . $daemon . "| grep -v grep | awk '{print $1}'` &> /dev/null"); |
05beae
|
474 |
|
4ebc7d
|
475 |
/* |
V |
476 |
* There are no more zombies left. Lets start the service.. |
|
477 |
*/ |
33bcd0
|
478 |
exec($app->system->getinitcommand($daemon, 'start')); |
dead5c
|
479 |
} |
b1a6a5
|
480 |
|
dead5c
|
481 |
} |
b1a6a5
|
482 |
|
dead5c
|
483 |
?> |