| commit | author | age | ||
| dead5c | 1 | <?php |
| V | 2 | |
| 3 | /* | |
| 4 | Copyright (c) 2007-2011, Till Brehm, projektfarm Gmbh and Oliver Vogel www.muv.com | |
| 5 | All rights reserved. | |
| 6 | ||
| 7 | Redistribution and use in source and binary forms, with or without modification, | |
| 8 | are permitted provided that the following conditions are met: | |
| 9 | ||
| 10 | * Redistributions of source code must retain the above copyright notice, | |
| 11 | this list of conditions and the following disclaimer. | |
| 12 | * Redistributions in binary form must reproduce the above copyright notice, | |
| 13 | this list of conditions and the following disclaimer in the documentation | |
| 14 | and/or other materials provided with the distribution. | |
| 15 | * Neither the name of ISPConfig nor the names of its contributors | |
| 16 | may be used to endorse or promote products derived from this software without | |
| 17 | specific prior written permission. | |
| 18 | ||
| 19 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| 20 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 21 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 22 | IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 23 | INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| 24 | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 26 | OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 27 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
| 28 | EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | */ | |
| 30 | ||
| 31 | class rescue_core_module { | |
| 32 | ||
| 33 | var $module_name = 'rescue_core_module'; | |
| 34 | var $class_name = 'rescue_core_module'; | |
| 35 | /* No actions at this time. maybe later... */ | |
| 36 | var $actions_available = array(); | |
| 4ebc7d | 37 | /** |
| 2332b2 | 38 | * The monitoring-Data of this module. |
| 4ebc7d | 39 | * [0] are the actual data, [1] are the data 1 minnute ago [2] are teh data 2 minuntes... |
| V | 40 | */ |
| 41 | private $_monitoringData = array(); | |
| 42 | /** The rescue-Data of this module. */ | |
| 43 | private $_rescueData = array(); | |
| dead5c | 44 | |
| V | 45 | /** |
| 46 | * This function is called during ispconfig installation to determine | |
| 47 | * if a symlink shall be created for this plugin. | |
| 48 | */ | |
| 49 | function onInstall() { | |
| 50 | return true; | |
| 51 | } | |
| 52 | ||
| 53 | /** | |
| 54 | * This function is called when the module is loaded | |
| 55 | */ | |
| 56 | function onLoad() { | |
| 4ebc7d | 57 | $this->_doRescue(); |
| dead5c | 58 | } |
| V | 59 | |
| 4ebc7d | 60 | /** |
| V | 61 | * This function is called when a change in one of the registered tables is detected. |
| 62 | * The function then raises the events for the plugins. | |
| dead5c | 63 | */ |
| V | 64 | function process($tablename, $action, $data) { |
| 65 | // not needed | |
| 66 | } | |
| 67 | ||
| 4ebc7d | 68 | /** |
| V | 69 | * This Method tries to rescue the server if a service is down. |
| dead5c | 70 | */ |
| 4ebc7d | 71 | private function _doRescue() { |
| V | 72 | /* |
| 73 | * do nothing, if the rescue-system is not enabled | |
| 74 | */ | |
| dead5c | 75 | global $conf; |
| 2332b2 | 76 | if ((!isset($conf['serverconfig']['rescue']['try_rescue'])) || |
| 4ebc7d | 77 | ((isset($conf['serverconfig']['rescue']['try_rescue'])) && ($conf['serverconfig']['rescue']['try_rescue'] !='y'))){ |
| dead5c | 78 | return; |
| 4ebc7d | 79 | } |
| dead5c | 80 | |
| V | 81 | /* |
| 4ebc7d | 82 | * First we get the monitoring data needed for rescuing the system |
| dead5c | 83 | */ |
| 4ebc7d | 84 | $this->_monitoringData = $this->_getMonitoringData(); |
| V | 85 | |
| 86 | /* | |
| 87 | * Next we get the rescue data needed for rescuing the system | |
| 88 | */ | |
| 89 | $this->_rescueData = $this->_getRescueData(); | |
| 2332b2 | 90 | |
| T | 91 | /* |
| 92 | * rescue MongoDB if needed | |
| 93 | */ | |
| 94 | $this->_rescueMongoDB(); | |
| 95 | ||
| 4ebc7d | 96 | /* |
| 8ab3cd | 97 | * rescue mysql if needed (maybe httpd depends on mysql, so try this first!) |
| 039b46 | 98 | */ |
| V | 99 | $this->_rescueMySql(); |
| 2332b2 | 100 | |
| 039b46 | 101 | /* |
| 8ab3cd | 102 | * rescue httpd if needed |
| 4ebc7d | 103 | */ |
| 8ab3cd | 104 | $this->_rescueHttpd(); |
| 2332b2 | 105 | |
| eed6b3 | 106 | /* |
| 4ebc7d | 107 | * The last step is to save the rescue-data |
| V | 108 | */ |
| 109 | $this->_saveRescueData(); | |
| 110 | } | |
| 111 | ||
| 112 | /** | |
| 113 | * This gets the Monitoring-Data, needed for rescuing the system. | |
| 114 | * Because we can not be 100% sure, that the mysql-DB is up and running, so we use the | |
| 115 | * file-system (this is no problem, because this module is the only one using this data, | |
| 116 | * so we do not have parallel access. | |
| 117 | */ | |
| 118 | private function _getMonitoringData() { | |
| dead5c | 119 | global $app; |
| 2332b2 | 120 | |
| 686742 | 121 | $dataFilename = dirname(__FILE__) . "/../temp/rescue_module_monitoringdata.ser.txt"; |
| 2332b2 | 122 | |
| 4ebc7d | 123 | /* |
| V | 124 | * If the file containing the data is too old (older than 5 minutes) it is better to |
| 2332b2 | 125 | * delete it, because it could be, that the server was down for some times and so the data |
| 4ebc7d | 126 | * are outdated |
| V | 127 | */ |
| 128 | if (file_exists($dataFilename) && (filemtime($dataFilename) < (time() - 5 * 60))) { | |
| 129 | unlink($dataFilename); | |
| 130 | } | |
| dead5c | 131 | |
| 4ebc7d | 132 | /* |
| V | 133 | * Get the monitoring-data |
| 134 | */ | |
| 135 | if (file_exists($dataFilename)) { | |
| 136 | $data = unserialize(file_get_contents($dataFilename)); | |
| dead5c | 137 | } else { |
| 4ebc7d | 138 | $data = array(); |
| V | 139 | } |
| 2332b2 | 140 | |
| 4ebc7d | 141 | /* |
| V | 142 | * $temp[0] was the data of the last monitoring (means 1 minute ago), $temp[1] is the data |
| 143 | * 2 minutes ago and so on. Now we have make place for the newest data... | |
| 144 | */ | |
| 145 | $max = sizeof($data); | |
| 146 | if ($max > 10){ | |
| 147 | $max = 10; // not more than 10 histories | |
| 148 | } | |
| 149 | for ($i = $max; $i > 0; $i--){ | |
| 150 | $data[$i] = $data[$i -1]; | |
| 151 | } | |
| 2332b2 | 152 | |
| 4ebc7d | 153 | /* |
| V | 154 | * we need the monitoring tools |
| 155 | */ | |
| 156 | $app->load('monitor_tools'); | |
| 157 | $tools = new monitor_tools(); | |
| 2332b2 | 158 | |
| 4ebc7d | 159 | /* |
| V | 160 | * Call the needed Monitoring-step and get the data |
| 161 | */ | |
| 162 | $tmp[0] = $tools->monitorServices(); | |
| 2332b2 | 163 | |
| 4ebc7d | 164 | /* Add the data at the FIRST position of the history */ |
| V | 165 | $data[0] = $tmp; |
| 2332b2 | 166 | |
| 4ebc7d | 167 | /* |
| V | 168 | * We have the newest monitoring data. Save it! |
| 849624 | 169 | * (and protect it, because there may be sensible data in it) |
| 4ebc7d | 170 | */ |
| V | 171 | file_put_contents($dataFilename, serialize($data)); |
| 849624 | 172 | chmod($dataFilename, 0600); |
| 2332b2 | 173 | |
| 4ebc7d | 174 | /* Thats it */ |
| V | 175 | return $data; |
| 176 | } | |
| 2332b2 | 177 | |
| 4ebc7d | 178 | /** |
| V | 179 | * This gets the rescue-Data, needed for rescuing the system. |
| 180 | * Because we can not be 100% sure, that the mysql-DB is up and running, so we use the | |
| 181 | * file-system (this is no problem, because this module is the only one using this data, | |
| 182 | * so we do not have parallel access. | |
| 183 | */ | |
| 184 | private function _getRescueData() { | |
| 686742 | 185 | $dataFilename = dirname(__FILE__) . "/../temp/rescue_module_rescuedata.ser.txt"; |
| 4ebc7d | 186 | |
| V | 187 | /* |
| 188 | * If the file containing the data is too old (older than 5 minutes) it is better to | |
| 2332b2 | 189 | * delete it, because it could be, that the server was down for some times and so the data |
| 4ebc7d | 190 | * are outdated |
| V | 191 | */ |
| 192 | if (file_exists($dataFilename) && (filemtime($dataFilename) < (time() - 5 * 60))) { | |
| 193 | unlink($dataFilename); | |
| dead5c | 194 | } |
| V | 195 | |
| 196 | /* | |
| 4ebc7d | 197 | * Get the rescue-data |
| dead5c | 198 | */ |
| 4ebc7d | 199 | if (file_exists($dataFilename)) { |
| V | 200 | $data = unserialize(file_get_contents($dataFilename)); |
| 201 | } else { | |
| 202 | $data = array(); | |
| dead5c | 203 | } |
| 2332b2 | 204 | |
| 4ebc7d | 205 | /* Thats it */ |
| V | 206 | return $data; |
| dead5c | 207 | } |
| V | 208 | |
| 4ebc7d | 209 | /** |
| V | 210 | * Writes the rescue data to disk. |
| 211 | * Because we can not be 100% sure, that the mysql-DB is up and running, so we use the | |
| 212 | * file-system (this is no problem, because this module is the only one using this data, | |
| 213 | * so we do not have parallel access. | |
| 214 | */ | |
| 215 | private function _saveRescueData() { | |
| 686742 | 216 | $dataFilename = dirname(__FILE__) . "/../temp/rescue_module_rescuedata.ser.txt"; |
| 849624 | 217 | /* |
| V | 218 | * We have the newest data. Save it! |
| 219 | * (and protect it, because there may be sensible data in it) | |
| 220 | */ | |
| 4ebc7d | 221 | file_put_contents($dataFilename, serialize($this->_rescueData)); |
| 849624 | 222 | chmod($dataFilename, 0600); |
| 4ebc7d | 223 | } |
| V | 224 | |
| 225 | /** | |
| 8ab3cd | 226 | * restarts httpd, if needed |
| 4ebc7d | 227 | */ |
| 8ab3cd | 228 | private function _rescueHttpd(){ |
| 4ebc7d | 229 | global $app, $conf; |
| 2332b2 | 230 | |
| dead5c | 231 | /* |
| 8ab3cd | 232 | * do nothing, if it is not allowed to rescue httpd |
| dead5c | 233 | */ |
| 8ab3cd | 234 | if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_httpd']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_httpd']) == 'y')){ |
| dead5c | 235 | return; |
| 4ebc7d | 236 | } |
| 2332b2 | 237 | |
| 4ebc7d | 238 | /* |
| V | 239 | * if the service is up and running, or the service is not installed there is nothing to do... |
| 240 | */ | |
| 241 | if ($this->_monitoringData[0][0]['data']['webserver'] != 0){ | |
| 242 | /* Clear the try counter, because we do not have to try to rescue the service */ | |
| 243 | $this->_rescueData['webserver']['try_counter'] = 0; | |
| 244 | return; | |
| 245 | } | |
| 2332b2 | 246 | |
| 4ebc7d | 247 | /* |
| V | 248 | * OK, the service is installed and down. |
| 249 | * Maybe this is because of a restart of the service by the admin. | |
| 250 | * This means, we check the data 1 minute ago | |
| 251 | */ | |
| 2332b2 | 252 | if ((!isset($this->_monitoringData[1][0]['data']['webserver'])) || |
| 4ebc7d | 253 | ((isset($this->_monitoringData[1][0]['data']['webserver'])) && ($this->_monitoringData[1][0]['data']['webserver'] != 0))){ |
| 2332b2 | 254 | /* |
| T | 255 | * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. |
| 256 | * This means, it could be, that the admin is restarting the server. | |
| 4ebc7d | 257 | * We wait one more minute... |
| dead5c | 258 | */ |
| 4ebc7d | 259 | return; |
| V | 260 | } |
| 2332b2 | 261 | |
| 4ebc7d | 262 | /*##### |
| V | 263 | * The service is down and it was down 1 minute ago. |
| 264 | * We try to rescue it | |
| 265 | *#####*/ | |
| 2332b2 | 266 | |
| 4ebc7d | 267 | /* Get the try counter */ |
| V | 268 | $tryCount = (!isset($this->_rescueData['webserver']['try_counter']))? 1 : $this->_rescueData['webserver']['try_counter'] + 1; |
| 2332b2 | 269 | |
| 4ebc7d | 270 | /* Set the new try counter */ |
| V | 271 | $this->_rescueData['webserver']['try_counter'] = $tryCount; |
| 2332b2 | 272 | |
| 4ebc7d | 273 | /* if 5 times will not work, we have to give up... */ |
| V | 274 | if ($tryCount > 5){ |
| 8ab3cd | 275 | $app->log('httpd is down! Rescue will not help!', LOGLEVEL_ERROR); |
| 4ebc7d | 276 | return; |
| V | 277 | } |
| 2332b2 | 278 | |
| T | 279 | |
| 8ab3cd | 280 | $app->log('httpd is down! Try rescue httpd (try:' . $tryCount . ')...', LOGLEVEL_WARN); |
| 2332b2 | 281 | |
| 8ab3cd | 282 | if($conf['serverconfig']['web']['server_type'] == 'nginx'){ |
| T | 283 | $daemon = 'nginx'; |
| dead5c | 284 | } else { |
| 8ab3cd | 285 | if(is_file($conf['init_scripts'] . '/' . 'httpd')) { |
| T | 286 | $daemon = 'httpd'; |
| 287 | } elseif(is_file($conf['init_scripts'] . '/' . 'httpd2')){ | |
| 288 | $daemon = 'httpd2'; | |
| 289 | } else { | |
| 290 | $daemon = 'apache2'; | |
| 291 | } | |
| dead5c | 292 | } |
| 2332b2 | 293 | |
| eed6b3 | 294 | $this->_rescueDaemon($daemon); |
| V | 295 | } |
| 2332b2 | 296 | |
| T | 297 | /** |
| 298 | * restarts MongoDB, if needed | |
| 299 | */ | |
| 300 | private function _rescueMongoDB(){ | |
| 301 | global $app, $conf; | |
| 302 | ||
| 303 | /* | |
| 304 | * do nothing, if it is not allowed to rescue mysql | |
| 305 | */ | |
| 306 | if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mongodb']) == 'y')){ | |
| 307 | return; | |
| 308 | } | |
| 309 | ||
| 310 | /* | |
| 311 | * if the service is up and running, or the service is not installed there is nothing to do... | |
| 312 | */ | |
| 313 | if ($this->_monitoringData[0][0]['data']['mongodbserver'] != 0){ | |
| 314 | /* Clear the try counter, because we do not have to try to rescue the service */ | |
| 315 | $this->_rescueData['mongodbserver']['try_counter'] = 0; | |
| 316 | return; | |
| 317 | } | |
| 318 | ||
| 319 | /* | |
| 320 | * OK, the service is installed and down. | |
| 321 | * Maybe this is because of a restart of the service by the admin. | |
| 322 | * This means, we check the data 1 minute ago | |
| 323 | */ | |
| 324 | if ((!isset($this->_monitoringData[1][0]['data']['mongodbserver'])) || | |
| 325 | ((isset($this->_monitoringData[1][0]['data']['mongodbserver'])) && ($this->_monitoringData[1][0]['data']['mongodbserver'] != 0))){ | |
| 326 | /* | |
| 327 | * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. | |
| 328 | * This means, it could be, that the admin is restarting the server. | |
| 329 | * We wait one more minute... | |
| 330 | */ | |
| 331 | return; | |
| 332 | } | |
| 333 | ||
| 334 | /*##### | |
| 335 | * The service is down and it was down 1 minute ago. | |
| 336 | * We try to rescue it | |
| 337 | *#####*/ | |
| 338 | ||
| 339 | /* Get the try counter */ | |
| 340 | $tryCount = (!isset($this->_rescueData['mongodbserver']['try_counter']))? 1 : $this->_rescueData['mongodbserver']['try_counter'] + 1; | |
| 341 | ||
| 342 | /* Set the new try counter */ | |
| 343 | $this->_rescueData['mongodbserver']['try_counter'] = $tryCount; | |
| 344 | ||
| 345 | /* if 5 times will not work, we have to give up... */ | |
| 346 | if ($tryCount > 5){ | |
| 347 | $app->log('MongoDB is down! Rescue will not help!', LOGLEVEL_ERROR); | |
| 348 | return; | |
| 349 | } | |
| 350 | ||
| 351 | ||
| 352 | $app->log('MongoDB is down! Try rescue MongoDB (try:' . $tryCount . ')...', LOGLEVEL_WARN); | |
| 353 | ||
| 354 | if(is_file($conf['init_scripts'] . '/' . 'mongodb')) { | |
| 355 | $daemon = 'mongodb'; | |
| 356 | } else { | |
| 357 | $daemon = 'mongodb'; | |
| 358 | } | |
| 359 | ||
| 360 | $this->_rescueDaemon($daemon); | |
| 361 | } | |
| 362 | ||
| eed6b3 | 363 | /** |
| V | 364 | * restarts mysql, if needed |
| 365 | */ | |
| 366 | private function _rescueMySql(){ | |
| 367 | global $app, $conf; | |
| 2332b2 | 368 | |
| eed6b3 | 369 | /* |
| V | 370 | * do nothing, if it is not allowed to rescue mysql |
| 371 | */ | |
| 372 | if ((isset($conf['serverconfig']['rescue']['do_not_try_rescue_mysql']) && ($conf['serverconfig']['rescue']['do_not_try_rescue_mysql']) == 'y')){ | |
| 373 | return; | |
| 374 | } | |
| 2332b2 | 375 | |
| eed6b3 | 376 | /* |
| V | 377 | * if the service is up and running, or the service is not installed there is nothing to do... |
| 378 | */ | |
| 379 | if ($this->_monitoringData[0][0]['data']['mysqlserver'] != 0){ | |
| 380 | /* Clear the try counter, because we do not have to try to rescue the service */ | |
| 381 | $this->_rescueData['mysqlserver']['try_counter'] = 0; | |
| 382 | return; | |
| 383 | } | |
| 2332b2 | 384 | |
| eed6b3 | 385 | /* |
| V | 386 | * OK, the service is installed and down. |
| 387 | * Maybe this is because of a restart of the service by the admin. | |
| 388 | * This means, we check the data 1 minute ago | |
| 389 | */ | |
| 2332b2 | 390 | if ((!isset($this->_monitoringData[1][0]['data']['mysqlserver'])) || |
| eed6b3 | 391 | ((isset($this->_monitoringData[1][0]['data']['mysqlserver'])) && ($this->_monitoringData[1][0]['data']['mysqlserver'] != 0))){ |
| 2332b2 | 392 | /* |
| T | 393 | * We do NOT have this data or we have this data, but the webserver was not down 1 minute ago. |
| 394 | * This means, it could be, that the admin is restarting the server. | |
| eed6b3 | 395 | * We wait one more minute... |
| V | 396 | */ |
| 397 | return; | |
| 398 | } | |
| 2332b2 | 399 | |
| eed6b3 | 400 | /*##### |
| V | 401 | * The service is down and it was down 1 minute ago. |
| 402 | * We try to rescue it | |
| 403 | *#####*/ | |
| 2332b2 | 404 | |
| eed6b3 | 405 | /* Get the try counter */ |
| V | 406 | $tryCount = (!isset($this->_rescueData['mysqlserver']['try_counter']))? 1 : $this->_rescueData['mysqlserver']['try_counter'] + 1; |
| 2332b2 | 407 | |
| eed6b3 | 408 | /* Set the new try counter */ |
| V | 409 | $this->_rescueData['mysqlserver']['try_counter'] = $tryCount; |
| 2332b2 | 410 | |
| eed6b3 | 411 | /* if 5 times will not work, we have to give up... */ |
| V | 412 | if ($tryCount > 5){ |
| 413 | $app->log('MySQL is down! Rescue will not help!', LOGLEVEL_ERROR); | |
| 414 | return; | |
| 415 | } | |
| 2332b2 | 416 | |
| T | 417 | |
| eed6b3 | 418 | $app->log('MySQL is down! Try rescue mysql (try:' . $tryCount . ')...', LOGLEVEL_WARN); |
| V | 419 | |
| 420 | if(is_file($conf['init_scripts'] . '/' . 'mysqld')) { | |
| 421 | $daemon = 'mysqld'; | |
| 422 | } else { | |
| 423 | $daemon = 'mysql'; | |
| 424 | } | |
| 2332b2 | 425 | |
| eed6b3 | 426 | $this->_rescueDaemon($daemon); |
| V | 427 | } |
| 428 | ||
| 429 | /** | |
| 430 | * Tries to stop and then restart the daemon | |
| 2332b2 | 431 | * |
| eed6b3 | 432 | * @param type $daemon the name of the daemon |
| V | 433 | */ |
| 434 | private function _rescueDaemon($daemon){ | |
| 435 | global $conf; | |
| 2332b2 | 436 | |
| eed6b3 | 437 | // if you need to find all restarts search for "['init_scripts']" |
| V | 438 | /* |
| 439 | * First we stop the running service "normally" | |
| 440 | */ | |
| 2332b2 | 441 | |
| dead5c | 442 | /* |
| 4ebc7d | 443 | * ATTENTION! |
| V | 444 | * The service hangs. this means it could be, that "stop" will hang also. |
| 445 | * So we have to try to stop but if this will not work, we have to kill the stopping | |
| 446 | * of the service | |
| dead5c | 447 | */ |
| 4ebc7d | 448 | exec($conf['init_scripts'] . '/' . $daemon . ' stop && (sleep 3; kill $!; sleep 2; kill -9 $!) &> /dev/null'); |
| 2332b2 | 449 | |
| 4ebc7d | 450 | /* |
| V | 451 | * OK, we tryed to stop it normally, maybe this worked maybe not. So we have to look |
| 452 | * if the service is already running or not. If so, we have to kill them hard | |
| 453 | */ | |
| 454 | exec("kill -9 `ps -A | grep " . $daemon . "| grep -v grep | awk '{print $1}'` &> /dev/null"); | |
| 2332b2 | 455 | |
| 4ebc7d | 456 | /* |
| V | 457 | * There are no more zombies left. Lets start the service.. |
| 458 | */ | |
| 459 | exec($conf['init_scripts'] . '/' . $daemon . ' start'); | |
| dead5c | 460 | } |
| V | 461 | } |
| 462 | ?> | |
