#!/bin/bash

 #描述: 秒级别监控 http 服务

 while [ 1 -lt 2  ]

 do

     sleep 10

     ai=`netstat -ntl | grep "\<80\>" | wc -l`

     if [ $ai -eq 0 ]

     then

         echo "WARNING!!! `date` httpd is stoped" >> /root/http.log

         systemctl restart httped >/dev/null 2>> /root/http.log

     fi

 done

 #!/bin/bsah

 #监控web服务的状态

 timeout=5       #定义wget的访问超时时间,超时就退出

 fails=0

 success=0

 while true

 do

         wget --timeout=$timeout --tries=1 http://www.qq.com -q -O /dev/null     #--tries自动重试

         if [ $? -ne 0 }         #如果访问不成功，失败次数+1，若成功，成功次数+1

         then

                 let fails=fails+1

         else

                 let success+=1

         fi

         if [ $success -ge 1 ]   #如果成功次数大于1,则输出成功信息

         then

                 echo success!

                 exit 0

         fi

         if [ $falis -ge 2 ]     #如果失败次数大于2，则报警

         then

                 critical='sys is down'

                 echo $critical|tee|mail -s "$critical" 15570361605@163.com

                 exit 2

         fi

 done

 #!/bin/bash

 #监控nginx服务

 #[`rpm -q nmap | wc -l` -lt 1] && yum install -y nmap &>/dev/null

 #num=`nmap 127.0.0.1 -p 80 2>/dev/null | grep open | wc -l`            #远程监测端口

 num=`netstat -ntlp | grep nginx | wc -l`

 if [ $num -gt o ]

 then

         echo "nginx is running..."

 else

         echo "nginx is stoped..."

         /etc/init.d/nginx start >/dev/null 2>> /root/nginx.log

 fi