public function check()
{
$arrRes = Utils::get_cmd_res('ulimit -c');
if ($arrRes[0] === '0') {
Utils::print_error("没有打开coredump设置");
return;
}
$arrRes = Utils::get_cmd_res('cat /proc/sys/kernel/core_pattern');
$pattern = $arrRes[0];
if (empty($pattern)) {
return;
}
$dir_name = dirname($pattern);
if ($dir_name === '.') {
return;
}
if ($handle = @opendir($dir_name)) {
$msg = '';
$delimiter = '';
while (false !== ($entry = readdir($handle))) {
if ($entry == '.' || $entry == '..') {
continue;
}
$msg .= "{$delimiter}corefile: {$entry} ";
$delimiter = "\n";
}
Utils::print_error($msg);
closedir($handle);
}
}
public function check()
{
$c_user = Utils::get_current_uname();
if ($c_user != 'root') {
Utils::print_error("'" . __CLASS__ . "' need root privilege to run check");
return;
}
$arrRes = Utils::get_cmd_res_split(" ps -efH | grep php-cgi | grep -v grep | awk '{print \$2}'");
unset($arrRes[0]);
$stack = array();
foreach ($arrRes as $val) {
$cmd = "pstack {$val[0]} | head -1 | awk '{print \$4}'";
$hang_fun = Utils::get_cmd_res($cmd);
$stack[] = $hang_fun[0];
}
$cnt_val = array_count_values($stack);
arsort($cnt_val);
$sum_process = count($arrRes);
foreach ($cnt_val as $key => $val) {
if ($key == '__accept_nocancel') {
continue;
}
if ($val * 2 >= $sum_process) {
$msg = "php process hang on system function '{$key}' ";
Utils::print_error($msg);
}
}
}
public function check()
{
/*----------检查磁盘空间-------------*/
$cmd = "df -h";
$arrRes = array();
exec($cmd, $arrRes);
unset($arrRes[0]);
foreach ($arrRes as $val) {
$val = Utils::split_line_space($val);
if ($val[4] == '100%') {
$msg = 'space:' . $val[0] . "\t" . $val[4];
Utils::print_error($msg);
}
}
/*----------检查inode使用-------------*/
$cmd = "df -i";
$arrRes = array();
exec($cmd, $arrRes);
unset($arrRes[0]);
foreach ($arrRes as $val) {
$val = Utils::split_line_space($val);
if ($val[4] == '100%') {
$msg = 'inode:' . $val[0] . "\t" . $val[4];
Utils::print_error($msg);
}
}
}
public function check()
{
$cmd = "ps -ef | grep 'php-cgi' | grep -v grep | wc -l";
$arrRes = Utils::get_cmd_res($cmd);
$php_num = intval($arrRes[0]);
if ($php_num == 0) {
$msg = "there are no php process";
Utils::print_error($msg);
}
}
public function check()
{
$cmd = "ps -ef | grep 'nginx: worker process' | grep -v grep | wc -l";
$arrRes = Utils::get_cmd_res($cmd);
$nginx_num = intval($arrRes[0]);
if ($nginx_num == 0) {
$msg = "there are no nginx process";
Utils::print_error($msg);
}
}
public function check()
{
$cmd = "netstat -n | grep SYN_RECV | wc -l";
$arrRes = Utils::get_cmd_res($cmd);
$syc_recv_num = intval($arrRes[0]);
if ($syc_recv_num > 10) {
$msg = "SYN_RECV status num : {$syc_recv_num}, there may be a syn flood attack";
Utils::print_error($msg);
}
}
public function check()
{
$arrRes = Utils::get_cmd_res('ulimit -n');
$max_open_file = intval($arrRes[0]);
$arrRes = Utils::get_cmd_res_split('sar -v 1');
$open_file = $arrRes[3][2];
if ($open_file * 100 / $max_open_file > 30) {
$msg = "open file handle num : {$open_file}, max open handle num : {$max_open_file}";
Utils::print_error($msg);
}
}
public function check()
{
$arrRes = Utils::get_cmd_res(' mpstat -P ALL | wc -l');
$cpu_num = $arrRes[0] - 4;
$arrRes = Utils::get_cmd_res_split('uptime');
$load_one_minute = trim($arrRes[0][7], ' ,');
if ($load_one_minute > 2 * $cpu_num) {
$msg = "cpu number: {$cpu_num}, load in 1 minute: {$load_one_minute}";
Utils::print_error($msg);
}
}
public function checkStatus($log_line, $log_format)
{
$index = $log_format['$status'];
$status = array();
foreach ($log_line as $val) {
$status[$val[$index]]++;
}
if ($status[200] != count($log_line)) {
$msg = "http status num :\n" . var_export($status, true);
Utils::print_error($msg);
}
}
public function check()
{
$php_server_port = lnmpConfig::PHP_SERVER_PORT;
$cmd = "netstat -n | grep ESTABLISHED | awk '{print \$4}' | grep :{$php_server_port} | wc -l";
$arrRes = Utils::get_cmd_res($cmd);
$concurrency = intval($arrRes[0]);
//并发度
if ($concurrency * 1000 > lnmpConfig::REQUEST_TIME_COST * lnmpConfig::SERVER_THROUGHPUT) {
$msg = "the php connections is too many , connections: {$concurrency} , time_cost : " . lnmpConfig::REQUEST_TIME_COST . "ms, throughput :" . lnmpConfig::SERVER_THROUGHPUT . "qps";
Utils::print_error($msg);
}
}
public function check()
{
$web_server_port = lnmpConfig::WEB_SERVER_PORT;
$cmd = "netstat -n | grep ESTABLISHED | awk '{print \$4}' | grep :{$web_server_port} | wc -l";
$arrRes = Utils::get_cmd_res($cmd);
$concurrency = intval($arrRes[0]);
//并发度，不活跃进的连接也算作了并发度，在繁忙的服务器上，连接一般都是活跃的，所以误差不会很大, 长连接除外。
if ($concurrency * 1000 > lnmpConfig::REQUEST_TIME_COST * lnmpConfig::SERVER_THROUGHPUT) {
$msg = "the server connections is too many , connections: {$concurrency} , time_cost : " . lnmpConfig::REQUEST_TIME_COST . "ms, throughput :" . lnmpConfig::SERVER_THROUGHPUT . "qps";
Utils::print_error($msg);
}
}
public function check()
{
$arrRes = Utils::get_cmd_res_split('free');
$total = $arrRes[1][1];
$free = $arrRes[2][3];
$use_ratio = round(($total - $free) * 100 / $total, 1);
if ($use_ratio > 80) {
$used = $total - $free;
$total = round($total / 1024, 0);
$used = round($used / 1024, 0);
$free = round($free / 1024, 0);
$msg = "Memory, total: {$total}M, used:{$used}M, free:{$free}M, {$use_ratio}% used";
Utils::print_error($msg);
}
//是否要加下swap使用率
}
public function check()
{
$arrRes = Utils::get_cmd_res_split('iostat -d -x 1 2');
//计算最近的1s IOWAIT也在这里查看
for ($i = 6;; $i++) {
$hd = $arrRes[$i];
if (empty($hd[0])) {
break;
}
if ($hd[11] >= 20) {
$msg = "{$hd[0]} : {$hd[11]}, percentage of CPU time during which I/O requests were issued to the device, the IO is too high";
Utils::print_error($msg);
}
$await = $hd[9];
$svctm = $hd[10];
if ($await > 5 * $svctm) {
$msg = "await : {$await}, svctm:{$svctm}, the await time is greater than svctm much more, the IO is too high";
Utils::print_error($msg);
}
}
}
public function check()
{
$arrRes = Utils::get_cmd_res_split('vmstat 1 2');
//计算最近的1s IOWAIT也在这里查看
$idle = $arrRes[3][14];
if ($idle < 20) {
$msg = "idle:{$idle}";
Utils::print_error($msg);
}
$wa = $arrRes[3][15];
if ($wa > 10) {
$msg = "cpu wa:{$wa}, too many time spent waiting for IO";
// iostat -x %util也会相应的高
Utils::print_error($msg);
}
$si = $arrRes[3][6];
$so = $arrRes[3][7];
if ($si >= 200 || $so >= 200) {
$msg = "si: {$si} , so: {$so} , the swap rate is too high, may not have enough memory";
Utils::print_error($msg);
}
}
public function check()
{
$mysql_info = lnmpConfig::$mysql_info;
$link = mysql_connect($mysql_info['host'] . ':' . $mysql_info['port'], $mysql_info['user'], $mysql_info['pass']);
if ($link === false) {
$msg = "Failed to connect to MySQL: " . mysql_error();
Utils::print_error($msg);
exit;
}
$result = mysql_query("show processlist;");
$sum_cnt = 0;
$no_sleep_cnt = 0;
while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) {
if ($line['Command'] != 'Sleep') {
$no_sleep_cnt++;
}
$sum_cnt++;
}
if ($sum_cnt > 3 && $no_sleep_cnt * 5 > $sum_cnt) {
$msg = "Too many mysql threads is running";
Utils::print_error($msg);
}
}
public function check()
{
/********网络流量检测*******/
$arrRes = Utils::get_cmd_res_split('sar -n DEV 1');
for ($i = 3;; $i++) {
$IFACE = $arrRes[$i][1];
if (empty($IFACE)) {
break;
}
$rxbyt = $arrRes[$i][4];
$txbyt = $arrRes[$i][5];
$speed = $this->getNetCardSpeed('IFACE');
if ($rxbyt * 100 / $speed > 80) {
$msg = "{$IFACE} received speed : {$rxbyt} byte/s, net card speed: {$speed} byte/s";
Utils::print_error($msg);
}
if ($txbyt * 100 / $speed > 80) {
$msg = "{$IFACE} send speed : {$rxbyt} byte/s, net card speed: {$speed} byte/s";
Utils::print_error($msg);
}
}
/********网络错误检测*******/
$arrRes = Utils::get_cmd_res_split('sar -n EDEV 1');
for ($i = 3;; $i++) {
$IFACE = $arrRes[$i][1];
if (empty($IFACE)) {
break;
}
$rxerr = $arrRes[$i][2];
$txerr = $arrRes[$i][3];
$coll = $arrRes[$i][4];
$rxdrop = $arrRes[$i][5];
$txdrop = $arrRes[$i][6];
$txcarr = $arrRes[$i][7];
$rxfram = $arrRes[$i][8];
$rxfifo = $arrRes[$i][9];
$txfifo = $arrRes[$i][10];
if ($rxerr > 10) {
$msg = "{$IFACE} Total number of bad packets received per second: {$rxerr}";
Utils::print_error($msg);
}
if ($txerr > 10) {
$msg = "{$IFACE} Total number of errors that happened per second while transmitting packets: {$txerr} , there are some wrong with the net ";
Utils::print_error($msg);
}
if ($coll > 10) {
$msg = "{$IFACE} Number of collisions that happened per second while transmitting packets: {$coll}";
Utils::print_error($msg);
}
if ($rxdrop > 10) {
$msg = "{$IFACE} Number of received packets dropped per second because of a lack of space in linux buffers: {$rxdrop} ";
Utils::print_error($msg);
}
if ($txdrop > 10) {
$msg = "{$IFACE} Number of transmitted packets dropped per second because of a lack of space in linux buffers: {$txdrop} ";
Utils::print_error($msg);
}
if ($txcarr > 10) {
$msg = "{$IFACE} Number of carrier-errors that happened per second while transmitting packets: {$txcarr} ";
Utils::print_error($msg);
}
if ($rxfram > 10) {
$msg = "{$IFACE} Number of frame alignment errors that happened per second on received packets: {$rxfram} ";
Utils::print_error($msg);
}
if ($rxfifo > 10) {
$msg = "{$IFACE} Number of FIFO overrun errors that happened per second on received packets: {$rxfifo} ";
Utils::print_error($msg);
}
if ($txfifo > 10) {
$msg = "{$IFACE} Number of FIFO overrun errors that happened per second on transmitted packets: {$txfifo} ";
Utils::print_error($msg);
}
}
}