shell编程3

    xiaoxiao2021-04-18  63

    本人附注对本shell告警系统的认识。 需求: 使用shell定制各种个性化告警工具,但需要统一化管理、规范化管理。 思路:指定一个脚本包,包含主程序、子程序、配置文件、邮件引擎、输出日志等。 主程序:作为整个脚本的入口,是整个系统的命脉。 配置文件:是一个控制中心,用它来开关各个子程序,指定各个相关联的日志文件。 子程序:这个才是真正的监控脚本,用来监控各个指标。 邮件引擎:是由一个php程序来实现,它可以定义发邮件的服务器、发邮件人以及收邮件人。 输出日志:整个监控系统要有日志输出。 要求:我们的机器角色多种多样,但是所有机器上都要部署同样的监控系统,也就说所有机器不管什么角色,整个程序框架都是一致的,不同的地方在于根据不同的角色,定制不同的配置文件。 程序架构:       

                                             (主目录 mon)

                    ____________________________________________________

                                                                                                   

                   bin          conf            shares                  mail                         log

                                                                                                

               [main.sh] [ mon.conf] [load.sh 502.sh]  [mail.php mail.sh] [  mon.log  err.log ]

    bin下是主程序

    conf下是配置文件

    shares下是各个监控脚本

    mail下是邮件引擎

    log下是日志。

    下面我发出几个示例脚本

    1.  main.sh

    #!/bin/bash #Written by aming. # 是否发送邮件的开关 export send=1 # 过滤ip地址 export addr=`/sbin/ifconfig |grep -A1 'eth0' |grep addr: |awk '{print $2}'|awk -F: '{print $2}'` dir=`pwd` # 只需要最后一级目录名 last_dir=`echo $dir|awk -F'/' '{print $NF}'` # 下面的判断目的是,保证执行脚本的时候,我们在bin目录里,不然监控脚本、邮件和日志很有可能找>不到 if [ $last_dir == "bin" ] || [ $last_dir == "bin/" ]; then     conf_file="../conf/mon.conf" else     echo "you shoud cd bin dir"     exit fi exec 1>>../log/mon.log 2>>../log/err.log echo "`date +"%F %T"` load average" /bin/bash ../shares/load.sh #先检查配置文件中是否需要监控502 if grep -q 'to_mon_502=1' $conf_file; then     export log=`grep 'logfile=' $conf_file |awk -F '=' '{print $2}' |sed 's/ //g'`

    2.  配置文件   mon.conf

    ## to config the options if to monitor ## cdb  主要定义mysql的服务器地址、端口以及user、password to_mon_cdb=0   ##0 or 1, default 0,0 not monitor, 1 monitor cdb_ip=10.20.3.13 cdb_port=3315 cdb_user=username cdb_pass=passwd ## httpd   如果是1则监控,为0不监控 to_mon_httpd=0 ## php 如果是1则监控,为0不监控 to_mon_php_socket=0 ## http_code_502  需要定义访问日志的路径 to_mon_502=1 logfile=/data/log/xxx.xxx.com/access.log ## request_count   定义日志路径以及域名 to_mon_request_count=0 req_log=/data/log/www.discuz.net/access.log domainname=www.discuz.net

    3.  load.sh

    #! /bin/bash

    #! /bin/bash ##Writen by aming## load=`uptime |awk -F 'average:' '{print $2}'|cut -d',' -f1|sed 's/ //g' |cut -d. -f1` if [ $load -gt 20 ] && [ $send -eq "1" ] then     echo "$addr `date +%T` load is $load" >../log/load.tmp     /bin/bash ../mail/mail.sh $addr\_load $load ../log/load.tmp fi echo "`date +%T` load is $load"

    4.  502.sh

    #! /bin/bash d=`date -d "-1 min" +%H:%M` c_502=`grep :$d:  $log  |grep ' 502 '|wc -l` if [ $c_502 -gt 10 ] && [ $send == 1 ]; then      echo "$addr $d 502 count is $c_502">../log/502.tmp      /bin/bash ../mail/mail.sh $addr\_502 $c_502  ../log/502.tmp fi echo "`date +%T` 502 $c_502"

    disk.sh

    #! /bin/bash ##Writen by aming## rm -f ../log/disk.tmp for r in `df -h |awk -F '[ %]+' '{print $5}'|grep -v Use` do     if [ $r -gt 90 ] && [ $send -eq "1" ] then     echo "$addr `date +%T` disk useage is $r" >>../log/disk.tmp fi if [ -f ../log/disk.tmp ] then     df -h >> ../log/disk.tmp     /bin/bash ../mail/mail.sh $addr\_disk $r ../log/disk.tmp     echo "`date +%T` disk useage is nook" else     echo "`date +%T` disk useage is ok" fi

    5. mail.php

     <?php class Smtp {     /* Public Variables */     var $smtp_port;     var $time_out;     var $host_name;     var $log_file;     var $relay_host;     var $debug;     var $auth;     var $user;     var $pass;     /* Private Variables */     var $sock;     /* Constractor */     function Smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)     {         $this->debug = FALSE;         $this->smtp_port = $smtp_port;         $this->relay_host = $relay_host;         $this->time_out = 30; //is used in fsockopen()         #         $this->auth = $auth;//auth         $this->user = $user;         $this->pass = $pass;         #         $this->host_name = "localhost"; //is used in HELO command         $this->log_file = "";         $this->sock = FALSE;     }     /* Main Function */     function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")     {         $mail_from = $this->get_address($this->strip_comment($from));         $body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);         $header = "MIME-Version:1.0\r\n";         if($mailtype=="HTML"){             $header .= "Content-Type:text/html\r\n";         }         $header .= "To: ".$to."\r\n";         if ($cc != "") {             $header .= "Cc: ".$cc."\r\n";         }         $header .= "From: $from<".$from.">\r\n";         $header .= "Subject: ".$subject."\r\n";         $header .= $additional_headers;         $header .= "Date: ".date("r")."\r\n";         $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";         list($msec, $sec) = explode(" ", microtime());         $header .= "Message-ID: <".date("ymdhis>\r\n";         $TO = explode(",", $this->strip_comment($to));         if ($cc != "") {             $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));         }         if ($bcc != "") {             $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));         }         $sent = TRUE;         foreach ($TO as $rcpt_to) {             $rcpt_to = $this->get_address($rcpt_to);             if (!$this->smtp_sockopen($rcpt_to)) {                 $this->log_write("Error: Cannot send email to ".$rcpt_to."\n");                 $sent = FALSE;                 continue;             }             if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {                 $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");             } else {                 $this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");                 $sent = FALSE;             }             fclose($this->sock);             $this->log_write("Disconnected from remote host\n");         }         return $sent;     } /* Private Functions */    function smtp_send($helo, $from, $to, $header, $body = "")     {         if (!$this->smtp_putcmd("HELO", $helo)) {             return $this->smtp_error("sending HELO command");         }         #auth         if($this->auth){             if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {                 return $this->smtp_error("sending HELO command");             }             if (!$this->smtp_putcmd("", base64_encode($this->pass))) {                 return $this->smtp_error("sending HELO command");             }         }         #         if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) {             return $this->smtp_error("sending MAIL FROM command");         }         if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) {             return $this->smtp_error("sending RCPT TO command");         }         if (!$this->smtp_putcmd("DATA")) {             return $this->smtp_error("sending DATA command");         }         if (!$this->smtp_message($header, $body)) {             return $this->smtp_error("sending message");         }         if (!$this->smtp_eom()) {             return $this->smtp_error("sending .[EOM]");         }         if (!$this->smtp_putcmd("QUIT")) {             return $this->smtp_error("sending QUIT command");         }         return TRUE;     }     function smtp_sockopen($address)     {         if ($this->relay_host == "") {             return $this->smtp_sockopen_mx($address);         } else {             return $this->smtp_sockopen_relay();         }     }     function smtp_sockopen_relay()     {         $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");         $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);         if (!($this->sock && $this->smtp_ok())) {             $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");             $this->log_write("Error: ".$errstr." (".$errno.")\n");             return FALSE;         }         $this->log_write("Connected to relay host ".$this->relay_host."\n");         return TRUE;     }     function smtp_sockopen_mx($address)     {         $domain = ereg_replace("^.+@([^@]+)$", "\1", $address);         if (!@getmxrr($domain, $MXHOSTS)) {             $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");             return FALSE;         }         foreach ($MXHOSTS as $host) {             $this->log_write("Trying to ".$host.":".$this->smtp_port."\n");            $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);             if (!($this->sock && $this->smtp_ok())) {                 $this->log_write("Warning: Cannot connect to mx host ".$host."\n");                 $this->log_write("Error: ".$errstr." (".$errno.")\n");                continue;             }             $this->log_write("Connected to mx host ".$host."\n");             return TRUE;         }         $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");        return FALSE;     }     function smtp_message($header, $body)     {       fputs($this->sock, $header."\r\n".$body);         $this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));         return TRUE;     }     function smtp_eom()    {         fputs($this->sock, "\r\n.\r\n");         $this->smtp_debug(". [EOM]\n");         return $this->smtp_ok();     }     function smtp_ok()    {         $response = str_replace("\r\n", "", fgets($this->sock, 512));         $this->smtp_debug($response."\n");         if (!ereg("^[23]", $response)) {             fputs($this->sock, "QUIT\r\n");             fgets($this->sock, 512);             $this->log_write("Error: Remote host returned \"".$response."\"\n");             return FALSE;         }         return TRUE;     }     function smtp_putcmd($cmd, $arg = "")     {         if ($arg != "") {            if($cmd=="") $cmd = $arg;             else $cmd = $cmd." ".$arg;         }         fputs($this->sock, $cmd."\r\n");         $this->smtp_debug("> ".$cmd."\n");         return $this->smtp_ok();     }     function smtp_error($string)     {         $this->log_write("Error: Error occurred while ".$string.".\n");         return FALSE;     }     function log_write($message)     {         $this->smtp_debug($message);         if ($this->log_file == "") {                 return TRUE;         }         $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;         if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {             $this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");             return FALSE;;         }         flock($fp, LOCK_EX);         fputs($fp, $message);         fclose($fp);         return TRUE;     }     function strip_comment($address)    {         $comment = "\([^()]*\)";        while (ereg($comment, $address)) {             $address = ereg_replace($comment, "", $address);         }         return $address;     }     function get_address($address)     {         $address = ereg_replace("([ \t\r\n])+", "", $address);         $address = ereg_replace("^.*<(.+)>.*$", "\1", $address);         return $address;     }     function smtp_debug($message)     {         if ($this->debug) {         echo $message;         }     } } $file = $argv[2]; $smtpserver = "smtp.qq.com";//SMTP服务器 $smtpserverport = "25";//SMTP服务器端口 $smtpusermail = "381198658@qq.com";//SMTP服务器的用户邮箱 $smtpemailto = "3091ishi@139.com";//发送给谁 $smtpuser = "282837773";//SMTP服务器的用户帐号 $smtppass = "12yiqiang";//SMTP服务器的用户密码 $mailsubject = $argv[1];//邮件主题 $mailbody = file_get_contents($file);//邮件内容 $mailtype = "HTML";//邮件格式(HTML/TXT),TXT为文本邮件 $smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);//这里面的一个true是表示使用身份验证,否则不使用身份验证. //$smtp->debug = TRUE;//是否显示发送的调试信息 $smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype); ?>  

        

    6. mail.sh

    #!/bin/bash     log=$1     t_s=`date +%s`     t_s2=`date -d "2 hours ago" +%s`     if [ ! -f /tmp/$log ]     then         echo $t_s2 > /tmp/$log     fi     t_s2=`tail -1 /tmp/$log|awk '{print $1}'`     echo $t_s >> /tmp/$log     v=$[$t_s-$t_s2]         echo $v     if [ $v -gt 3600 ]     then         /dir/to/php ../mail/mail.php "$1 $2" "$3"         echo "0" > /tmp/$log.txt     else         if [ ! -f /tmp/$log.txt ]         then             echo "0" > /tmp/$log.txt         fi         nu=`cat /tmp/$log.txt`         nu2=$[$nu+1]         echo $nu2 > /tmp/$log.txt         if [ $nu2 -gt 10 ]         then              echo "0" > /tmp/$log.txt         fi     fi

    要想发邮件的话,首先要有php支持,若你没有安装过lamp或者lnmp,则需要运行yum install -y php 安装。然后运行  php  mail.php  "邮箱主题写在这里" "/tmp/test.txt"   。其中,/tmp/test.txt 内容为邮件内容。

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