shell 监控脚本

 公司采用nagios监控，通过nagios client将需要的数据收集并传给nagios服务器，目前所遇到的问题是我们公司部分机器是再其他机房，例如：东航，是不允许安装客户端并访问外网的，为了更好的检测服务器状态，遇到问题可以发短信和邮件的方式通知运维人员进行处理，与开发人员协商开放了短信、邮件两个接口，通过脚本的方式将监控服务器状态，遇到故障后通过脚本方式发送报警。

目标分析：

  所需的监控资源：

       1、登陆用户数

       2、CPU负载

       3、服务探测

       4、硬盘空间（根分区、应用分区、备份分区）

       5、内存资源

  短信接口、邮件接口

       格式上传至附件

脚本：

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#!/bin/bash #监控用户登录 Usermonitor ()  {         LoginUser=`uptime | awk '{print $6}'`         if [ $LoginUser -ge 2 ]                 then                         Critical="当前系统登录用户人数超过1人，具体人数为：$LoginUser 个,请确认操作者人数。"                         status=0                 else                         echo "loginuser ok"                         status=1         fi } #监控内存 MemMonitor () {         MemTotal=`free -m | grep Mem | awk -F: '{print $2}' | awk '{print $1}'`         MemFree=`free -m | grep cache | awk NR==2 | awk '{print $4}'`         MemFreeB=`awk 'BEGIN{printf "%.2f%\n",'$MemFree/$MemTotal\*100'}'`         MemFreeS=`awk 'BEGIN{printf "%.f",'$MemFree/$MemTotal\*100'}'`         if [ $MemFreeS -lt  10 ]                 then                         Critical="系统可用内存小于10%，实际可用内存为：$MemFreeB ,请处理。"                         status=0                 elif [ $MemFreeS -lt 20 ]                         then                                 Warning="系统可用内存小于20%，实际可用内存为：$MemFreeB ，请查看。"                                 WarningT="内存报警"                                 status=1                         else                                 echo "Mem OK"                                 status=2         fi } #监控分区空间大小 DiskMonitorG () {         #根分区         DiskGB=`df -h | awk NR==2 | awk '{print $5}'`         DiskGS=`df -h | awk NR==2 | awk '{print $5}' | awk -F% '{print $1}'`         if [ $DiskGS -gt 90 ]                 then                         Critical="根分区使用率超过90%，实际已使用 $DiskGB ,请处理。"                         status=0                 elif [ $DiskGS -gt 80 -a $DiskGS -lt 90 ]                 then                         Warning="根分区使用率超过80%，实际已使用 $DiskGB , 请查看。"                         WarningT="根分区报警"                         status=1                 else                         echo "DiskGB Ok"                         status=2         fi                 } DiskMonitorA () {         #应用分区         ApplyB=`df -h | awk NR==4 | awk '{print $5}'`         ApplyS=`df -h | awk NR==4 | awk '{print $5}' | awk -F% '{print $1}'`         if [ $ApplyS -gt 90 ]                 then                         Critical="应用分区使用率超过90%，实际已使用 $ApplyB ,请处理."                         status=0                 elif [ $ApplyS -gt 80 -a $ApplyS -lt 90 ]                 then                         Warning="应用分区使用率超过80%，实际已使用 $ApplyB ，请查看。"                         WarningT="应用分区报警"                         status=1                 else                         echo "Apply ok"                         status=2         fi } #监控CPU负载 CPULoad () {         CPULoad1=`uptime | awk '{print $10}' | awk -F. '{print $1}'`         CPULoad2=`uptime`         if [ $CPULoad1 -gt 5 ]                 then                         Critical="CPU负载过高，请即使处理。 $CPULoad2 "                         status=0                 elif [ $CPULoad1 -gt 3 -a $CPULoad1 -lt 5 ]                 then                         Warning="CPU负载警告， $Warning "                         WarningT="CPU负载报警"                         status=1                 else                         echo "CPU OK"                         status=2         fi } #监控服务状态 ServerMonitor () { #服务状态监控         timeout=10         makfails=2         fails=0         success=0         while true                 do                         /usr/bin/wget --timeout=$timeout --tries=1 http://192.168.20.84/ -q -O /dev/null                         if [ $? -ne 0 ]                                 then                                         let fails=fails+1                                         success=0                                 else                                         fails=0                                         let success=1                         fi                         if [ $success -ge 1 ]                                 then                                         exit 0                         fi                         if [ $fails -ge 1 ]                                 then                                         Critical="TMS应用服务出现故障，请紧急处理！"                                         echo $Critical | mutt -s "服务down" hao.lulu@chinaebi.com                                         exit -1                         fi         done } #发送报警短信、报警邮件 for n in Usermonitor MemMonitor DiskMonitorG DiskMonitorA CPULoad ServerMonitor         do                 $n                 if [ $status -eq 0 ]                         then                                 curl "http://172.20.36.118/app/tms.do?tranCode=TM0311&content=$Critical"                         elif [ $status -eq 1 ]                                 then                                 curl "http://172.20.36.118/app/tms.do?tranCode=TM0310&title=$WarningT&content=Warning"                         else                                 echo "ok"                 fi done