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我有这个检查服务器负载的脚本。如果负载太高和/或从浏览器访问脚本，则脚本会获取所有正在运行的进程。

如果负载太高，并且脚本是从 cron 作业运行的，则正在运行的进程会邮寄给我。

我的问题是： 当负载太高，并且脚本是从 cron 作业运行时，service httpd fullstatus什么也不返回。所以我确实收到了一封说明负载的电子邮件。甚至在ps auxO-C | head电子邮件中显示。但只是不是service httpd fullstatus

如果脚本是从浏览器运行的，不管负载是否太高，service httpd fullstatus都ps auxO-C | head显示ok。

我不明白这是为什么...你们能帮帮我吗？我在某处有错字，还是我错过了一些限制/概念？

这是 crontab：

0,10,20,30,40,50 * * * * /usr/bin/php /var/www/html/loadChecker.php

这是脚本loadChecker.php：

<?php

define('LOAD_TRIGGER',10); // threshold setting for when to mail the load

// get load average
if (function_exists("sys_getloadavg")){
    $content=sys_getloadavg();
    $load=$content[0];
    $content = implode(" " , $content);
}
else{
    $content = file_get_contents("/proc/loadavg");
    $loadavg = explode(" ", $content);
    $load = $loadavg[0] + 0;
}


if($load >= LOAD_TRIGGER) // check if load is too high
{
    // load is too high. If we are in a browser, show running processes, otherwise mail them.
    $ps = Array();
    exec("ps auxO-C | head", $ps);
    $ps = implode("\n", $ps);

    $hs = Array();
    exec("service httpd fullstatus", $hs);
    $hs = implode("\n", $hs);

    if (isset($_SERVER['REMOTE_ADDR'])) // are we in a browser?
    {
        // yes we are. Let's show the PS and HTTPD fullstatus
        $output = str_replace("\n", "<br/>\n",  str_replace("  ", "&nbsp; ", $ps . "\n\n\n\n" . $hs)); // make it browser friendly
        $output = "<html><head></head><body>$output</body></html>";
        echo "Load is $content<br/>\n<br/>\n$output";
    }
    else
    {
        // no, we're not. Let's mail the PS and HTTPD fullstatus
        mail("me@here.com", "Load is $content", "$ps \n \n \n \n$hs "); // BUT THIS FAILS. THE PS IS SHOWN. BUT THE FULLSTATUS IS EMPTY IN THE MAIL
    }
}
else
{
    // load is OK. If we are in a browser, show running processes
    if (isset($_SERVER['REMOTE_ADDR']))
    {
        $ps = Array();
        exec("ps auxO-C | head", $ps);
        $ps = implode("\n", $ps);

        $hs = Array();
        exec("service httpd fullstatus", $hs);
        $hs = implode("\n", $hs);

        $output = str_replace("\n", "<br/>\n",  str_replace("  ", "&nbsp; ", $ps . "\n\n\n\n" . $hs)); // make it browser friendly
        $output = "<html><head></head><body>$output</body></html>";
        echo "Server load normaal ($content) op webserver3<br/>\n<br/>\n$output";
    }
}
?>
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1 回答 1

2

如果您使用完整路径，则可以解决。例如对于 centos，您可以使用：

/sbin/service httpd fullstatus

于 2013-06-05T20:45:25.107 回答