shell项目-告警系统

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

我们编写一个系统负载的告警系统：

cd /usr/local/sbin/
mkdir mon
cd mon
mkdir bin conf shares log mail
cd bin
vim main.sh

编辑主脚本：

#!/bin/bash
export send=1
export addr=`/sbin/ifconfig |grep -A1 "eth0"|awk '/inet/ {print $    2}'`
last_dir=`echo $PWD |awk -F '/' '{print $NF}'`
   
if [ $last_dir == "bin" ] || [ $last_dir == "bin/" ];then
conf_file="../conf/mon.conf"
else
      echo "you shoud cd .*/mon/bin/"
      exit
fi
exec 1>>../log/mon.log 2>>../log/err.log
echo "`date +"%F %T"` load average"
/bin/bash ../shares/load.sh
  
if grep -q 'to_mon_502=1' $conf_file;then
     export log=`grep 'logfile=' $conf_file |awk -F '=' '{print $2    }' |sed 's/ //g'`
     /bin/bash ../shares/502.sh
fi

接着编辑这个脚本的配置文件：
cd …/conf/
vim mon.conf

 ## mysql
   to_mon_cdb=0
   db_ip=106.13.219.104
   db_port=3306
   db_user=username
   db_password=passwd
   
   ## httpd
   to_mon_httpd=0
  ## php
  to_mon_php_socket=0
  ##http_code_502
  to_mon_502=0
  logfile=/data/log/www.discuz.com/access.log
  to_mon_request_count=0
  req_log=/data/log/www.discuz.net/access.log
  domainname=www.discuz.net

然后编辑子脚本：

cd ../shares/
vim load.sh
#!/bin/bash
   load=`uptime |awk -F 'average: ' '{print $2}'|cut -d ',' -f2 |cut     -d . -f2|sed 's/0//g'`
   if [ $load -gt 2 ] && [ $send -eq "1" ]
   then
       echo "$addr `date +%T` load is $load" >../log/load.tmp
       /bin/bash ../mail/mail.sh 1694489278@qq.com "$addr\_load:$loa    d" `cat ../log/load.tmp`
   fi
   echo "`date +%T` load is $load"

当然还可以有磁盘使用量的监控负载：
vim disk.sh

#!/bin/bash
   rm -f ../log/disk.tmp
   for r in `df -h|awk -F '[ %]+' '{print $5}' |grep -v Use`
   do
       if [ $r -gt 80 ] && [ $send -eq "1" ]
   then
       echo "$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 not ok"
  else
      echo "`date +%T` disk useage is ok"
  fi

最后编辑邮件告警：

cd ../mail/
vim mail.sh  
log=$1
  2 t_s=`date +%s`
   t_s2=`date -d "2 hours ago" +%s`
   if [ ! -f /tmp/$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
      ./mail.py $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
          ./mail.py $1 "trouble continue 10 mins $2 " "$3"
          echo "0" > /tmp/$log.txt
      fi
  fi

最后编辑mail.py文件：

#!/usr/bin/env python
#-*- coding: UTF-8 -*-
import os,sys
reload(sys)
sys.setdefaultencoding('utf8')
import getopt
import smtplib
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart
from  subprocess import *

def sendqqmail(username,password,mailfrom,mailto,subject,content):
    gserver = 'smtp.qq.com'
    gport = 25

    try:
        # msg = MIMEText(unicode(content).encode('utf-8')) //如果发送的邮件有乱码，可以尝试把这行改成如下：
        msg = MIMEText(content,'plan','utf-8') 
        msg['from'] = mailfrom
        msg['to'] = mailto
        msg['Reply-To'] = mailfrom
        msg['Subject'] = subject

        smtp = smtplib.SMTP(gserver, gport)
        smtp.set_debuglevel(0)
        smtp.ehlo()
        smtp.login(username,password)

        smtp.sendmail(mailfrom, mailto, msg.as_string())
        smtp.close()
    except Exception,err:
        print "Send mail failed. Error: %s" % err


def main():
    to=sys.argv[1]
    subject=sys.argv[2]
    content=sys.argv[3]
##定义QQ邮箱的账号和密码，你需要修改成你自己的账号和密码（请不要把真实的用户名和密码放到网上公开，否则你会死的很惨）
    sendqqmail('1234567@qq.com','aaaaaaaaaa','1234567@qq.com',to,subject,content)

if __name__ == "__main__":
    main()