如何解决linux网卡掉包或挂掉?

分类:Linux,工作记,问题集 | 作者:凹凸曼 | 发表于2013/04/23 1条评论

之前公司的系统由于网卡问题,经常出现掉包(掉包排除攻击的 因素)或者突然挂掉,

严重影响服务的正常提供,因此想在出现此问题时自动解决。

思路:对网卡检测掉包情况,或者用ping检测,出现了,就重启哈网卡 。瞧是很简单吧!

代码如下:

#安装帮助: mkdir  /cyc
#/cyc/renetwork.log为日志文件

#!/bin/bash
# 2013-2-17 @凹凸曼
# ping timeout  restart network
# lastmodtime 2013-3-19
pingNetwork(){
        local c=$1
        local pcount=$2
        local dst=192.168.0.143    #修改为你的交互机或者路由器ip
        if [[ ! $pcount =~ ^[0-9]+$ ]];then
                pcount=5
        fi
        loss=`ping -c $pcount  $dst|grep loss|awk '{print $6}'|cut -d% -f 1 `
        if [[ ! $loss =~ ^[0-9]+$ ]];then
                loss=100
        fi

        if [ $loss -gt 0 ]; then
                ifdown $c
                sleep 3
                ifup $c
                echo `date "+%Y%m%d %T"`": $pcount ping $loss% loss">>/cyc/renetwork.log
                sleep 30
        fi

}

#start dst eth
stopEth(){
        local c=$1
        local et=`service network status |tail -1|grep "$c"`

        if [ x"" == x"$et" ]; then
                ifup $c
                echo `date "+%Y%m%d %T"`":$c stop">>/cyc/renetwork.log
                sleep 30
        fi
}
#drop found
NetDrop(){
        local c=$1
        #$6 RX-DRP
        local redp=`netstat -i|grep "$c"|awk 'END{print $6}'`
        #$10 TX-DRP
        local txdp=`netstat -i|grep "$c"|awk 'END{print $10}'`

        if [ $redp -gt 0 ];then
                ifdown $c
                sleep 3
                ifup $c
                echo `date "+%Y%m%d %T"`":$c RX-DRP drop">>/cyc/renetwork.log
                sleep 30
        fi

        sleep 2
    if [ $txdp -gt 0 ];then
                ifdown $c
                sleep 3
                ifup $c
                echo `date "+%Y%m%d %T"`":$c TX-DRP drop">>/cyc/renetwork.log
                sleep 30
        fi

}

wtime=$2
eth=$1
if [[ ! $wtime =~ ^[0-9]+$ ]];then
  wtime=3
fi
if [ x"" == x"$eth" ];then
        echo "please enter the NIC name!"
        exit
fi
while [ 1 ]
        do

        stopEth $eth
        sleep $wtime
        NetDrop $eth
        sleep $wtime
        pingNetwork $eth 1

done

程序运行至目前的日志结果如下:

20130319 12:23:01: eth0 1 ping 100% loss
20130319 13:43:50: eth0 1 ping 100% loss
20130319 18:11:18: eth0 1 ping 100% loss
20130323 08:04:59: eth0 1 ping 100% loss
20130323 14:41:04: eth0 1 ping 100% loss
20130324 12:49:04: eth0 1 ping 100% loss
20130327 13:15:47: eth0 1 ping 100% loss
20130401 11:17:42: eth0 1 ping 100% loss
20130402 09:02:14: eth0 1 ping 100% loss
20130403 08:49:30: eth0 1 ping 100% loss
20130404 20:21:46: eth0 1 ping 100% loss
20130407 18:44:57: eth0 1 ping 100% loss
20130408 10:46:53: eth0 1 ping 100% loss
20130408 14:41:06: eth0 1 ping 100% loss
20130408 14:47:24: eth0 1 ping 100% loss
20130408 15:23:02:eth0 RX-DRP drop
20130415 08:30:09: eth0 1 ping 100% loss
20130415 11:16:16: eth0 1 ping 100% loss
20130417 08:05:41: eth0 1 ping 100% loss
20130419 08:04:19: eth0 1 ping 100% loss
20130419 10:40:51: eth0 1 ping 100% loss
20130419 11:33:14: eth0 1 ping 100% loss
20130419 19:03:03: eth0 1 ping 100% loss
20130421 16:10:55: eth0 1 ping 100% loss
20130422 07:47:34: eth0 1 ping 100% loss
20130423 07:15:07: eth0 1 ping 100% loss

呵呵,自动解决了网卡掉包或挂掉的烦恼!您是不是很爽!
忘记了说鸟,此程序运行环境Red Hat Enterprise Linux Server release 5.4或者Centos6.3
其他linux环境估计问题不大,这里就不测试鸟!

本文出自 “凹凸曼” 博客,请务必保留此出处  http://www.apoyl.com/?p=1496
Tag:

日志信息 »

该日志于2013-04-23 10:36由 凹凸曼 发表在Linux, 工作记, 问题集分类下, 你可以发表评论。除了可以将这个日志以保留源地址及作者的情况下引用到你的网站或博客,还可以通过RSS 2.0订阅这个日志的所有评论。

目前盖楼 (1)层:

发表评论 »

« »