shell脚本检查是否存在tun0虚拟网卡，若不不存在服务器更改port,并重启服务器，客户端修改port,并重新启动客户端

openvp 客户端 /home 目录下各脚本文件名

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[root@jira home]# ls

  openvpn_server_restart.sh  openvpn_tunnel_monitor.sh 

　　

openvpn_tunnel_monitor.sh 为死循环脚本来检测 tun0 网卡是否存在，若不存在，对服务器端 openvpn server 进行操作，更换port并重启openvpn 服务，同时更改openvpn 客户端port端口对应服务器port端口，同时重新启动客户端

 

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cat openvpn_tunnel_monitor.sh

 

while [ 1 ]

  

do

  tun0_route=`ifconfig|grep -ci "tun0"`

    

  if [ $tun0_route -eq 0 ];then

    

    echo "openvpn tunnel is down ,need do the restart operation." >> /tmp/openvpn_tunnel.log

 

    ssh root@47*****27 'bash -x -s' < /home/openvpn_server_restart.sh

 

    scp root@47******27:/etc/openvpn/server.conf  /home

    server_port=`cat /home/server.conf|grep -i "port"|grep -v "^#"|awk '{print $2}'`

    sed -i "s@remote.*@remote 47*******27 $server_port@" /etc/openvpn/fanqiang001.conf

     

    PID=`ps -fe|grep fangqiang001|grep -v grep|awk '{print $2}'`

 

    if [ "$PID" ];then

    ps -fe|grep fangqiang001|grep -v grep|awk '{print $2}'|xargs kill -9

    echo "old openvpn client  process  is killed" >> /tmp/openvpn_tunnel.log

    fi

  

   source /etc/profile

   cd /etc/openvpn

   nohup /usr/sbin/openvpn  --cd /etc/openvpn --config fanqiang001.conf --log-append /var/log/openvpn.log  >> nohup.out 2>&1 &

 

   sleep 5

   new_pid=`ps -fe|grep openvpn|grep -v grep|awk '{print $2}'`

   echo $new_pid

 

   if [ "$new_pid" ];then

          echo  " openvpn client  process  started success  !" >> /tmp/openvpn_tunnel.log

   fi

 

          

    

  fi

  

  sleep 600

done

　　

openvpn_server_restart.sh 脚本主要重新启动openvpn server端

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#!/bin/bash

 

server_port=`cat /etc/openvpn/server.conf|grep -i "port"|grep -v "^#"|awk '{print $2}'`

 

server_port=$((server_port+1))

 

 

sed -i "s@port.*@port $server_port@" /etc/openvpn/server.conf

 

service openvpn restart

　　

配置后台运行脚本

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sh  openvpn_tunnel_monitor.sh & > /dev/null 2>&1