写完“Linux服务器监控系统 ServMon V1.1”[原创]

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2007-8-31 18:23 | by 张宴 ]

　　[文章作者：张宴本文版本：v1.1 最后修改：2007.08.31 转载请注明出处：http://blog.zyan.cc]

　　8月3日，我写了“Linux服务器监控系统 ServMon V1.0”，今天，ServMon V1.1 版本亮相。

　　ServMon的原理是用shell脚本定时抓取被监控Linux服务器上的信息，再用curl POST到监控机的PHP接口程序上，由PHP接口程序对信息进行分析，如果存在异常，则发送报警邮件给管理员。报警邮件演示页面请见：http://blog.zyan.cc/read.php/276.htm

　　

　　ServMon V1.1 在 1.0 的基础上，增加了对Linux系统负载的监控，并编写了客户端自动安装包：

　　1、被监控端服务器（Linux）
　　(1)、下载并安装ServMon Client

引用

wget http://blog.zyan.cc/soft/linux/servmon/servmon-1.1.linux.tar.gz
tar zxvf servmon-1.1.linux.tar.gz
cd servmon-1.1
./install -i http://yourdomain/servmon/interface.php password

　　注：此处的password为interface.php程序中设置的数据传输验证密码。

　　客户端安装包源码：
　　│
　　├─install
　　├─[src]
　　│　 ├─[bin]
　　│　 │　　├─diskstat_send
　　│　 │　　├─loadstat_send
　　│　 │　　└─swapstat_send
　　│　 ├─[cron]
　　│　 │　　└─servmon
　　│　 └─[data]

　　屏幕演示：
　　

　　2、监控端服务器配置（Linux）
　　(1)、启动sendmail
　　/usr/sbin/sendmail -bd -q30m
　　-b：指定Sendmail在后台运行，并且监听端口25的请求。
　　-d：指定Sendmail以Daemon方式运行（守护进程）。
　　-q：当Sendmail无法将邮件成功地发送到目的地时，它会将邮件保存在队列里。该参数指定邮件在队列里保存的时间。其中的30m表示保留30分钟。

　　(2)、修改php.ini的[mail function]部分为以下内容，然后重启Apache，使PHP能够使用mail()函数发送电子邮件

引用

[mail function]
; For Win32 only.
;SMTP = localhost
;smtp_port = 25

; For Win32 only.
;sendmail_from = me@example.com

; For Unix only. You may supply arguments as well (default: "sendmail -t -i").
sendmail_path = /usr/sbin/sendmail -t -i

　　(4)、在MySQL上创建一个数据库servmon，然后在该数据库中执行以下SQL语句创建表：

引用

CREATE TABLE `tb_diskstat` (
`ip` varchar(128) NOT NULL default '',
`date` int(10) NOT NULL default '0',
UNIQUE KEY `ip` (`ip`)
) TYPE=MyISAM;

　　备注：这张表是PHP接口程序用来记录发送磁盘分区报警邮件的时间，避免在一段时间内重复发送大量报警邮件的。

　　(3)、PHP接口程序
　　http://yourdomain/servmon/interface.php

<?php   
/**  
*********************************************************************  
* Copyright (c) 2007, 回忆未来[张宴]  
* All rights reserved.  
*  
* 文件名称： interface.php  
* 摘    要： 服务器监控系统ServMon接口程序  
* 描    述：  
* 作    者： 张宴  新浪UC：103500  博客：blog.zyan.cc  
* 版    本： 1.1  
* 时    间： 2007-08-31  
*********************************************************************  
*/  
  
//------------------配置信息------------------   
$password = "yourpassword";//设置数据传输验证密码，ServMon客户端安装时需要指定此密码   
$mysql_server = "127.0.0.1:3306";//MySQL服务器地址及端口，例如localhost:3306   
$mysql_db = "servmon";//MySQL数据库名   
$mysql_username = "root";//MySQL帐号   
$mysql_password = "";//MySQL密码   
$disk_max = "90";//磁盘分区使用百分比超过此值，则报警。默认为90%   
$disk_sendmail_interval = "43200";//如果同一台服务器连续报警，设置每隔多少秒发送一次报警邮件。默认为43200秒，即12小时。   
$swap_max = "50";//Swap交换空间使用百分比超过此值，则报警。默认为50%   
$email = "webmaster@zyan.cc,info@zyan.cc";//管理员邮箱，多个邮箱以逗号分割   
//--------------------------------------------

//密码验证
if (htmlspecialchars($_POST["password"]) != $password)
{
    echo "数据传输验证密码错误！\n";
    exit();
}

//磁盘分区报警（分区使用率超过90%后会发邮件报警）
if (htmlspecialchars($_POST["menu"]) == "diskstat")
{
    $is_send_mail = "0";//是否发邮件，0为不发邮件
    $date = htmlspecialchars($_POST["date"]);
    $ip = htmlspecialchars($_POST["ip"]);
    $data = htmlspecialchars($_POST["data"]);
    $arr1 = explode(";", $data);
    foreach ($arr1 as $key1 => $value1)
    {
        $arr2 = explode(":", $value1);
        if ($arr2[0] != "" && $arr2[1] != "" && $arr2[1] >= $disk_max)
        {
            $subject = "[系统监控]_磁盘分区空间不足_" . $ip;
            $message = "服务器监控系统 ServMon V1.1\r\n";
            $message = $message . "-------------------------------------------------------\r\n";
            $message = $message . "报警服务器：" . $ip . "\r\n";
            $message = $message . "-------------------------------------------------------\r\n";
            $message = $message . "报警时间：" . $date . "\r\n";
            $message = $message . "-------------------------------------------------------\r\n";
            $message = $message . "报警内容：\r\n";
            $message = $message . "●磁盘分区 " . $arr2[0] . " 空间不足（空间使用率达到" . $arr2[1] . "%）\r\n";
            $headers = 'From: ServMon <servmon@sina.com>' . "\r\n" .
                'Reply-To: ServMon <servmon@sina.com>' . "\r\n" . 'X-Mailer: PHP/' . phpversion();
            $is_send_mail = "1";//是否发邮件，1为发送邮件
        }
    }
    if ($is_send_mail == "1")
    {
        $connect = mysql_connect($mysql_server, $mysql_username, $mysql_password);
        $select = mysql_select_db($mysql_db, $connect);
        $select_result = mysql_query("SELECT date FROM tb_diskstat WHERE ip='" . $ip .
            "' LIMIT 1");
        $rs = mysql_fetch_array($select_result);
        $interval = date("U") - $rs["date"];
        if ($interval >= $disk_sendmail_interval)
        {
            if (mail($email, $subject, $message, $headers))
            {
                echo "已成功发送报警邮件！\n";
            }
            else
            {
                echo "发送报警邮件失败！\n";
            }
            $insert_result = mysql_query("REPLACE INTO tb_diskstat (ip, date) VALUES ('" . $ip .
                "', '" . date("U") . "');");
        }
        else
        {
            if ($disk_sendmail_interval >= 3600)
            {
                $disk_sendmail_interval_text = $disk_sendmail_interval / 3600 . "小时";
            }
            else
            {
                $disk_sendmail_interval_text = $disk_sendmail_interval . "秒";
            }
            echo "已发送过报警邮件，" . $disk_sendmail_interval_text . "内不再重复发送！\n";
        }

}
    else
    {
        echo "磁盘分区空间足够，无须发送报警邮件！\n";
    }
    exit();
}

//Swap交换空间报警（Swap交换空间使用率超过60%后会发邮件报警）
if (htmlspecialchars($_POST["menu"]) == "swapstat")
{
    $is_send_mail = "0";//是否发邮件，0为不发邮件
    $date = htmlspecialchars($_POST["date"]);
    $ip = htmlspecialchars($_POST["ip"]);
    list($total, $used, $free) = split(":", htmlspecialchars($_POST["data"]));
    $percentage = round($used / $total * 100, 0);
    if ($percentage >= $swap_max)
    {
        $subject = "[系统监控]_Swap交换空间使用率高达" . $percentage . "%_" . $ip;
        $message = "服务器监控系统 ServMon V1.1\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警服务器：" . $ip . "\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警时间：" . $date . "\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警内容：\r\n";
        $message = $message . "●Swap交换空间使用率高达" . $percentage . "%，若继续增加到100%可能会导致服务器死机。\r\n";
        $message = $message . "●Swap交换空间总量：" . $total . " MB\r\n";
        $message = $message . "●Swap交换空间使用：" . $used . " MB\r\n";
        $message = $message . "●Swap交换空间剩余：" . $free . " MB\r\n";
        $headers = 'From: ServMon <servmon@sina.com>' . "\r\n" .
            'Reply-To: ServMon <servmon@sina.com>' . "\r\n" . 'X-Mailer: PHP/' . phpversion();
        $is_send_mail = "1";//是否发邮件，1为发送邮件
    }
    if ($is_send_mail == "1")
    {
        if (mail($email, $subject, $message, $headers))
        {
            echo "已成功发送报警邮件！\n";
        }
        else
        {
            echo "发送报警邮件失败！\n";
        }
    }
    else
    {
        echo "Swap交换空间使用率不高，无须发送报警邮件！\n";
    }
    exit();
}

//系统负载过高报警
if (htmlspecialchars($_POST["menu"]) == "loadstat")
{
    $is_send_mail = "0";//是否发邮件，0为不发邮件
    $date = htmlspecialchars($_POST["date"]);
    $ip = htmlspecialchars($_POST["ip"]);
    list($load_last_1min, $load_last_5min, $load_last_15min) = split(",",
        htmlspecialchars($_POST["data"]));
    if ($load_last_15min >= 25)
    {
        if ($load_last_15min < 50)
        {
            $level = "轻微";
        }
        elseif ($load_last_15min < 100)
        {
            $level = "严重";
        }
        elseif ($load_last_15min < 500)
        {
            $level = "非常严重";
        }        
        else
        {
            $level = "接近崩溃";
        }
        $subject = "[系统监控]_系统负载过高(" . $level . ")_" . $ip;
        $message = "服务器监控系统 ServMon V1.1\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警服务器：" . $ip . "\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警时间：" . $date . "\r\n";
        $message = $message . "-------------------------------------------------------\r\n";
        $message = $message . "报警内容：\r\n";
        $message = $message . "●系统负载过高，级别：" . $level . " （25~50轻微、50~100严重、100~500非常严重、>500接近崩溃）\r\n";
        $message = $message . "●最近 1分钟系统负载：" . $load_last_1min . "\r\n";
        $message = $message . "●最近 5分钟系统负载：" . $load_last_5min . "\r\n";
        $message = $message . "●最近15分钟系统负载：" . $load_last_15min . "\r\n";
        $headers = 'From: ServMon <servmon@sina.com>' . "\r\n" .
            'Reply-To: ServMon <servmon@sina.com>' . "\r\n" . 'X-Mailer: PHP/' . phpversion();
        $is_send_mail = "1";//是否发邮件，1为发送邮件
    }
    if ($is_send_mail == "1")
    {
        if (mail($email, $subject, $message, $headers))
        {
            echo "已成功发送报警邮件！\n";
        }
        else
        {
            echo "发送报警邮件失败！\n";
        }
    }
    else
    {
        echo "系统负载不高，无须发送报警邮件！\n";
    }
    exit();
}
?>

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