function SwapWatchdog()
{
$sock = new sockets();
$unix = new unix();
$MonitConfig = unserialize(base64_decode($sock->GET_INFO("SquidWatchdogMonitConfig")));
$MonitConfig = watchdog_config_default($MonitConfig);
$ps = $unix->find_program("ps");
if ($GLOBALS["VERBOSE"]) {
echo "\n******** SWAP *******\n";
}
if ($MonitConfig["SWAP_MONITOR"] == 0) {
return;
}
include_once dirname(__FILE__) . "/ressources/class.main_cf.inc";
$sys = new systeminfos();
$pourc = round($sys->swap_used / $sys->swap_total * 100);
$freeMemory = $unix->TOTAL_MEMORY_MB_FREE();
$SwapMemoryused = $sys->swap_used;
ToSyslog("SwapWatchdog(): {$sys->swap_used}MB used Current {$pourc}% Free Memory: {$freeMemory}MB, min:{$MonitConfig["SWAP_MIN"]}% MAX:{$MonitConfig["SWAP_MAX"]}%");
if ($pourc < $MonitConfig["SWAP_MIN"]) {
return;
}
if (!isset($MonitConfig["SWAP_MIN"])) {
$MonitConfig["SWAP_MIN"] = 5;
}
if (!isset($MonitConfig["SWAP_MAX"])) {
$MonitConfig["SWAP_MAX"] = 55;
}
$ps_text[] = "There is not enough memory to clean the swap";
$ps_text[] = "Current configuration was: Free Swap memory over than {$MonitConfig["SWAP_MAX"]}%";
$ps_text[] = "Your current Swap file using: {$SwapMemoryused}M - {$pourc}% - {$sys->swap_used}/{$sys->swap_total}";
$ps_text[] = "Memory free on your system:{$freeMemory}M";
$ps_text[] = "You will find here a snapshot of current tasks";
$ps_text[] = ps_mem_report();
$ps_mail = @implode("\n", $ps_text);
if ($pourc > $MonitConfig["SWAP_MAX"]) {
if ($SwapMemoryused < $freeMemory) {
squid_admin_mysql(0, "[ALERT] REBOOT server!!! Swap exceed rule {$pourc}% max: {$MonitConfig["SWAP_MAX"]}%", $ps_mail, __FILE__, __LINE__);
FailOverDown("Swap exceed rule - reboot - {$pourc}% max:{$MonitConfig["SWAP_MAX"]}%\n{$ps_mail}");
shell_exec($unix->find_program("shutdown") . " -rF now");
die;
}
squid_admin_mysql(1, "Cleaning SWAP current: {$pourc}% max:{$MonitConfig["SWAP_MAX"]}%", "clean the swap ({$SwapMemoryused}M/{$freeMemory}M)\n{$ps_mail}", __FILE__, __LINE__);
SwapWatchdog_FreeSync();
die;
}
squid_admin_mysql(1, "Cleaning SWAP current:{$pourc}% min:{$MonitConfig["SWAP_MIN"]}%", "clean the swap ({$SwapMemoryused}M/{$freeMemory}M)\n{$ps_mail}", __FILE__, __LINE__);
SwapWatchdog_FreeSync();
}
function FreeMem($aspid = false, $SwapOffOn = array())
{
$unix = new unix();
if (!$aspid) {
$pidfile = "/etc/artica-postfix/pids/" . basename(__FILE__) . "." . __FUNCTION__ . ".pid";
$pid = @file_get_contents($pidfile);
if ($unix->process_exists($pid, basename(__FILE__))) {
if ($GLOBALS["VERBOSE"]) {
echo "Already executed pid {$pid}\n";
}
return;
}
}
if (count($SwapOffOn) == 0) {
$sock = new sockets();
$SwapOffOn = unserialize(base64_decode($sock->GET_INFO("SwapOffOn")));
if (!is_numeric($SwapOffOn["AutoMemWatchdog"])) {
$SwapOffOn["AutoMemWatchdog"] = 1;
}
if (!is_numeric($SwapOffOn["AutoMemPerc"])) {
$SwapOffOn["AutoMemPerc"] = 90;
}
if (!is_numeric($SwapOffOn["AutoMemInterval"])) {
$SwapOffOn["AutoMemInterval"] = 180;
}
}
$text[] = "Configuration was:";
$text[] = "--------------------------------------";
$text[] = "Free memory when Swap exceed {$SwapOffOn["AutoMemPerc"]}%";
$text[] = "Watchdog scanning interval: each {$SwapOffOn["AutoMemInterval"]}mn";
if (isset($SwapOffOn["CURRENT"])) {
$text[] = $SwapOffOn["CURRENT"];
}
$text[] = ps_mem_report();
$TOTAL_MEMORY_MB_FREE = $unix->TOTAL_MEMORY_MB_FREE();
$text[] = "{$TOTAL_MEMORY_MB_FREE}MB before operation";
$sync = $unix->find_program("sync");
$sysctl = $unix->find_program("sysctl");
$squid = $unix->LOCATE_SQUID_BIN();
shell_exec($sync);
shell_exec("{$sysctl} -w vm.drop_caches=3");
shell_exec($sync);
shell_exec("/etc/init.d/apache2 restart");
if (is_file("/etc/init.d/ssh")) {
shell_exec("/etc/init.d/ssh restart");
}
if ($unix->is_socket("/var/run/mysqld/mysqld.sock")) {
$q = new mysql();
$q->EXECUTE_SQL("RESET QUERY CACHE;");
}
if ($unix->is_socket("/var/run/mysqld/squid-db.sock")) {
$q = new mysql_squid_builder();
$q->EXECUTE_SQL("RESET QUERY CACHE;");
}
$TOTAL_MEMORY_MB_FREE2 = $unix->TOTAL_MEMORY_MB_FREE();
$text[] = "{$TOTAL_MEMORY_MB_FREE2}MB After operation";
$TOTAL_MEMORY_MB = $TOTAL_MEMORY_MB_FREE2 - $TOTAL_MEMORY_MB_FREE;
$text[] = "{$TOTAL_MEMORY_MB}MB restored";
$FINAL_TEXT = @implode("\n", $text);
system_admin_events("Free memory operation has been executed - {$TOTAL_MEMORY_MB}MB restored\n{$FINAL_TEXT}", __FUNCTION__, __FILE__, __LINE__);
if (is_file($squid)) {
squid_admin_mysql(1, "Swap exceed rule: Free memory operation has been executed - {$TOTAL_MEMORY_MB}MB restored", $FINAL_TEXT, __FILE__, __LINE__);
}
}
function SwapWatchdog()
{
$reboot = false;
$DisableSWAPP = $GLOBALS["CLASS_SOCKETS"]->GET_INFO("DisableSWAPP");
if (!is_numeric($DisableSWAPP)) {
$DisableSWAPP = 0;
}
if ($DisableSWAPP == 1) {
return;
}
@mkdir("/etc/artica-postfix/cron.1", 0755, true);
$filecache = "/etc/artica-postfix/cron.1/SwapOffOn.time";
$filecache20 = "/etc/artica-postfix/cron.1/SwapOffOn20.time";
$filecache50 = "/etc/artica-postfix/cron.1/SwapOffOn50.time";
$filecache100 = "/etc/artica-postfix/cron.1/SwapOffOn50.time";
$ps = $GLOBALS["CLASS_UNIX"]->find_program("ps");
$SwapOffOn = unserialize(base64_decode($GLOBALS["CLASS_SOCKETS"]->GET_INFO("SwapOffOn")));
if (!is_numeric($SwapOffOn["SwapEnabled"])) {
$SwapOffOn["SwapEnabled"] = 1;
}
if (!is_numeric($SwapOffOn["SwapMaxPourc"])) {
$SwapOffOn["SwapMaxPourc"] = 20;
}
if (!is_numeric($SwapOffOn["SwapMaxMB"])) {
$SwapOffOn["SwapMaxMB"] = 0;
}
if (!is_numeric($SwapOffOn["SwapTimeOut"])) {
$SwapOffOn["SwapTimeOut"] = 60;
}
include_once dirname(__FILE__) . "/ressources/class.main_cf.inc";
$sys = new systeminfos();
if ($sys->swap_used == 0) {
return;
}
if ($sys->swap_total == 0) {
return;
}
if ($sys->swap_used == $sys->swap_total) {
return;
}
events("{$sys->swap_used}/{$sys->swap_total} ", __FUNCTION__, __LINE__);
$pourc = round($sys->swap_used / $sys->swap_total * 100);
$notif = $notif . "{$sys->swap_used}/{$sys->swap_total}\n";
events("{$sys->swap_used}MB used ({$pourc}%)", __FUNCTION__, __LINE__);
if ($pourc > 20) {
if ($pourc < 50) {
$filetime = $GLOBALS["CLASS_UNIX"]->file_time_min($filecache20);
if ($filetime > 30) {
@unlink($filecache20);
@file_put_contents($filecache20, time());
squid_admin_mysql(1, "[INFO]: System swap exceed {$pourc}%", "You will find here a snapshot of current tasks\n" . ps_mem_report());
}
}
}
if ($pourc > 50) {
if ($pourc < 70) {
$filetime = $GLOBALS["CLASS_UNIX"]->file_time_min($filecache50);
if ($filetime > 15) {
@unlink($filecache50);
@file_put_contents($filecache50, time());
squid_admin_mysql(1, "[WARNING]: System swap exceed {$pourc}%", "You will find here a snapshot of current tasks\n" . ps_mem_report());
}
}
}
if ($pourc > 70) {
$filetime = $GLOBALS["CLASS_UNIX"]->file_time_min($filecache100);
if ($filetime > 10) {
@unlink($filecache100);
@file_put_contents($filecache100, time());
squid_admin_mysql(0, "[ALERT!!]: System swap exceed {$pourc}%", "You will find here a snapshot of current tasks\n" . ps_mem_report());
}
}
if ($SwapOffOn["SwapEnabled"] == 0) {
return;
}
$filetime = $GLOBALS["CLASS_UNIX"]->file_time_min($filecache);
if ($filetime < $SwapOffOn["SwapTimeOut"]) {
events("{$filetime}Mn need to wait {$SwapOffOn["SwapTimeOut"]}mn", __FUNCTION__, __LINE__);
return;
}
if ($SwapOffOn["SwapMaxMB"] > 0) {
if ($sys->swap_used > $SwapOffOn["SwapMaxMB"]) {
$execeed_text = $SwapOffOn["SwapMaxMB"] . "MB";
$reboot = true;
}
}
if ($SwapOffOn["SwapMaxMB"] == 0) {
if ($pourc > 3) {
if ($pourc > $SwapOffOn["SwapMaxPourc"]) {
$execeed_text = $SwapOffOn["SwapMaxPourc"] . "%";
$reboot = true;
}
}
}
@unlink($filecache);
@file_put_contents($filecache, time());
if (!$reboot) {
return;
}
$swapoff = $GLOBALS["CLASS_UNIX"]->find_program("swapoff");
$swapon = $GLOBALS["CLASS_UNIX"]->find_program("swapon");
if (!is_file($swapoff)) {
events("swapoff no such file", __FUNCTION__, __LINE__);
shell_exec2("sync; echo \"3\" > /proc/sys/vm/drop_caches >/dev/null 2>&1");
return;
}
if (!is_file($swapon)) {
events("swapon no such file", __FUNCTION__, __LINE__);
shell_exec2("sync; echo \"3\" > /proc/sys/vm/drop_caches >/dev/null 2>&1");
return;
}
$time = time();
if (function_exists("WriteToSyslogMail")) {
WriteToSyslogMail("SwapWatchdog:: Starting to purge the swap file because it execeed rules", basename(__FILE__));
}
$cmd = "{$swapoff} -a 2>&1";
$results = array();
$results[] = $cmd;
events("running {$cmd}", __FUNCTION__, __LINE__);
exec($cmd, $results);
$cmd = "{$swapon} -a 2>&1";
$results[] = $cmd;
events("running {$cmd}", __FUNCTION__, __LINE__);
exec($cmd, $results);
$text = @implode("\n", $results);
$time_duration = distanceOfTimeInWords($time, time());
shell_exec2("sync; echo \"3\" > /proc/sys/vm/drop_caches >/dev/null 2>&1");
events("results: {$time_duration}\n {$text}", __FUNCTION__, __LINE__);
$notif = $notif . "\nMemory swap purge {$execeed_text} ({$time_duration})\n{$text}";
squid_admin_mysql(1, "Memory swap purge {$execeed_text}", "(Execution time: {$time_duration})", __FILE__, __LINE__);
$GLOBALS["CLASS_UNIX"]->send_email_events("Memory swap purge {$execeed_text} (task time execuction: {$time_duration})", $text, "system");
$sqdbin = $GLOBALS["CLASS_UNIX"]->find_program("squid");
if (!is_file($sqdbin)) {
$sqdbin = $GLOBALS["CLASS_UNIX"]->find_program("squid3");
}
if (is_file($sqdbin)) {
$php5 = $GLOBALS["CLASS_UNIX"]->LOCATE_PHP5_BIN();
$nohup = $GLOBALS["CLASS_UNIX"]->find_program("nohup");
if (function_exists("debug_backtrace")) {
$trace = debug_backtrace();
if (isset($trace[1])) {
$sourcefunction = $trace[1]["function"];
$sourceline = $trace[1]["line"];
$executed = "Executed by {$sourcefunction}() line {$sourceline}\nusing argv:{$GLOBALS["ARGVS"]}\n";
}
}
squid_admin_mysql(1, "Asking to reload proxy service after purging the Swap file", "{$executed}\n{$notif}", __FILE__, __LINE__);
if (function_exists("WriteToSyslogMail")) {
WriteToSyslogMail("SwapWatchdog:: reloading Squid after purging the Swap file", basename(__FILE__));
}
shell_exec2("{$nohup} {$php5} /usr/share/artica-postfix/exec.squid.php --reload-squid --bywatchdog >/dev/null 2>&1 &");
}
}