Linux双网卡绑定脚本的方法示例

linux运维及配置工作中，常常会用到双网卡绑定，这篇文章主要介绍了Linux双网卡绑定脚本的方法示例，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

linux运维及配置工作中，常常会用到双网卡绑定，少数几台服务器的配置还好，如果是需要配置几十甚至上百台，难免会枯燥乏味，易于出错，我编写了这个双网卡绑定的辅助脚本，可傻瓜式地完成linux双网卡绑定工作，当然，该脚本主要还是用于小批量的系统配置，如需配置大量的服务器，可提取脚本中的bonding函数，稍作修改即可，你值得一试！

1.适用范围

该shell脚本可在以下linux系统创建多个绑定网卡，用于生产环境没问题的：

Redhat 5.x
CentOS 5.x
Kylin 3.x
KUX 2.x

2.脚本特点

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   :eth0 Second NIC  :eth1 bond name   :bond1 IP address  :192.168.56.11 netmask    :255.255.255.0 bonding_mode :mode=1 primary NIC  :none ---------------------------------------------- Pls make sure its OK[y/n]:y

如上，脚本在使用过程中，会依次提示输入需要绑定的子网卡名称、绑定网卡名称、IP地址和子网掩码、绑定模式、是否指定主网卡，并主动对系统中可用网卡进行识别并列出，供用户选择，同时会判断输入的各项信息的正确性，保障双网卡绑定顺利进行。

3.使用说明

首先将脚本上传至linux系统任意目录下，使用root用户执行：

 [root@node1 tmp]# sh bonding_v2.0.sh ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- 4 network cards available: eth0 eth1 eth2 eth3 ---------------------------------------------- Please enter the First NIC:_

首先脚本会列出系统中有多少可用网卡，并提示输入需要绑定的第一块子网卡的名称，这里输入eth2。

无需担心输入错误，输入重复等问题，脚本会自动判断你的输入信息是否正确。

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- 4 network cards available: eth0 eth1 eth2 eth3 The information you have entered: First NIC   : eth2 ---------------------------------------------- Please select the second NIC:_

接着输入需要绑定的第二块网卡的名称eth3，如果输入错误会出现相应的提示，比如错输入为eth8，会提示需要重新输入：

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- 4 network cards available: eth0 eth1 eth2 eth3 The information you have entered: First NIC   : eth2 ---------------------------------------------- eth8 is not available,Please enter another one. Please select the second NIC:_

正确输入需要绑定的第二块网卡eth3后，如果linux系统中之前不存在绑定网卡，则默认第一个绑定网卡的名称为bond0，如果系统中存在绑定网卡，脚本会提示输入bondN(N为数字)：

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   : eth2 Second NIC  : eth3 bond name   : bond0 ---------------------------------------------- The default first bond name is -- bond0. Please enter an IP address:_

按照提示输入需要绑定的IP地址，比如10.1.1.1

脚本会自动判断输入的IP地址格式和范围是否正确，无需担心输入错误

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   : eth2 Second NIC  : eth3 bond name   : bond0 IP address  : 10.1.1.1 ---------------------------------------------- Pls enter the NETMASK[255.255.255.0]:_

输入IP地址后，会提示输入子网掩码，默认为255.255.255.0，直接回车即可，也可以输入自定义的子网掩码。

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   : eth2 Second NIC  : eth3 bond name   : bond0 IP address  : 10.1.1.1 netmask    : 255.255.255.0 ---------------------------------------------- Pls enter the bonding_mode[default:mode=1,active-backup]:_

这一步是输入网卡绑定级别，默认使用主备模式：mode=1，直接回车即可，也可以输入自定义的绑定级别（如输入 mode=6），格式为：

 mode=｛0,1,2,3,4,5,6｝ ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   :eth2 Second NIC  :eth3 bond name   :bond0 IP address  :10.1.1.1 netmask    :255.255.255.0 bonding_mode :mode=1 ---------------------------------------------- 1-eth2 2-eth3 3-none choose whether to set up the primary NIC or not[default:3-none]:_

此时脚本提示是否设置primary网卡，primary网卡的作用是在子网卡均正常时，primary网卡优先处于活动状态，这里默认为不设置primary网卡，也可以输入数字1或2选择一个网卡为primary网卡。

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- The information you have entered: First NIC   :eth2 Second NIC  :eth3 bond name   :bond0 IP address  :10.1.1.1 netmask    :255.255.255.0 bonding_mode :mode=1 primary NIC  :none ---------------------------------------------- Pls make sure its OK[y/n]:_

至此，所有信息输入完毕，脚本会让您判断输入的所有信息是否正确，正确则输入y，进行下一步操作，否则输入n，重新输入以上信息。

 ---------------------------------------------- ------ Network Configuration Assistant ------ ---------------------------------------------- Complete! File backup directory: /etc/sysconfig/network-scripts/inspur_bak you can check the file and then restart the network service. 1 ) service network restart 2 ) exit ---------------------------------------------- Please make your choice:_

看到这里时，所有绑定网卡的配置文件已经修改完毕了，输入1重启网络服务；输入2直接退出脚本。

建议选择重启网络服务，如果直接退出脚本而不重启网络服务，修改的配置文件是不会生效的，并且在使用该脚本创建下一个绑定网卡时显示信息会出现异常(因为脚本通过ifconfig命令获取当前网卡信息)。

 you can check the file and then restart the network service. 1 ) service network restart 2 ) exit ---------------------------------------------- Please make your choice:1 正在关闭接口 eth0：                    [确定] 正在关闭接口 eth1：                    [确定] 正在关闭接口 eth2：                    [确定] 正在关闭接口 eth3：                    [确定] 关闭环回接口：                       [确定] 弹出环回接口：                       [确定] 弹出界面 bond0： RTNETLINK answers: File exists 在 bond0 添加地址 10.1.1.1 时出错。 [确定] 弹出界面 eth0：                      [确定] 弹出界面 eth1：                      [确定]

第一次重启网络服务时可能会出现以上类似报错，无需担心，其实配置已经完成，再次重启网络服务即恢复正常。

在绑定过程中修改的配置文件如下：

 [root@node1 tmp]# cd /etc/sysconfig/network-scripts/ [root@node1 network-scripts]# cat ifcfg-bond0 DEVICE=bond0 BOOTPROTO=none ONBOOT=yes TYPE=Ethernet USERCTL=no IPV6INIT=no PEERDNS=yes IPADDR=10.1.1.1 NETMASK=255.255.255.0 BONDING_OPTS="miimon=100 mode=1" [root@node1 network-scripts]# cat ifcfg-eth2 DEVICE=eth2 BOOTPROTO=none #HWADDR=08:00:27:41:b4:16 ONBOOT=yes TYPE=Ethernet USERCTL=no IPV6INIT=no PEERDNS=yes SLAVE=yes MASTER=bond0 [root@node1 network-scripts]# cat ifcfg-eth3 DEVICE=eth3 BOOTPROTO=none #HWADDR=08:00:27:6c:3d:0c ONBOOT=yes TYPE=Ethernet USERCTL=no IPV6INIT=no PEERDNS=yes SLAVE=yes MASTER=bond0 [root@node1 network-scripts]# cat /etc/modprobe.conf alias scsi_hostadapter ata_piix alias scsi_hostadapter1 ahci alias net-pf-10 off alias ipv6 off options ipv6 disable=1 alias snd-card-0 snd-intel8x0 options snd-card-0 index=0 options snd-intel8x0 index=0 remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0 alias eth0 e1000 alias eth1 e1000 alias eth2 e1000 alias eth3 e1000 alias bond0 bonding

网络配置信息如下：

 [root@node1 tmp]# ifconfig bond0   Link encap:Ethernet HWaddr 08:00:27:41:B4:16 inet addr:10.1.1.1 Bcast:10.1.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:1197 errors:0 dropped:0 overruns:0 frame:0 TX packets:125 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:106338 (103.8 KiB) TX bytes:16662 (16.2 KiB) eth0   Link encap:Ethernet HWaddr 08:00:27:35:B4:81 inet addr:192.168.56.11 Bcast:192.168.56.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1487 errors:0 dropped:0 overruns:0 frame:0 TX packets:1190 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:146576 (143.1 KiB) TX bytes:151787 (148.2 KiB) eth1   Link encap:Ethernet HWaddr 08:00:27:72:08:46 inet addr:10.1.1.11 Bcast:10.1.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:193 errors:0 dropped:0 overruns:0 frame:0 TX packets:455 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:31434 (30.6 KiB) TX bytes:22657 (22.1 KiB) eth2   Link encap:Ethernet HWaddr 08:00:27:41:B4:16 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:591 errors:0 dropped:0 overruns:0 frame:0 TX packets:93 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:55217 (53.9 KiB) TX bytes:10511 (10.2 KiB) eth3   Link encap:Ethernet HWaddr 08:00:27:41:B4:16 UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1 RX packets:606 errors:0 dropped:0 overruns:0 frame:0 TX packets:32 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:51121 (49.9 KiB) TX bytes:6151 (6.0 KiB) lo    Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:3297 errors:0 dropped:0 overruns:0 frame:0 TX packets:3297 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:4725726 (4.5 MiB) TX bytes:4725726 (4.5 MiB)

双网卡绑定信息：

 [root@node1 tmp]# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.4.0-2 (October 7, 2008) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: eth2 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eth2 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 08:00:27:41:b4:16 Slave Interface: eth3 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 08:00:27:6c:3d:0c

4.脚本代码

 #!/bin/bash # Date:2018-11-26 14:28:45 # Author:ZhangJian # Mail:1037509307@qq.com # Func:Configure Network Bonding # Version:2.0 #V1.6版本更新:不再将绑定的模式mode=x写入modprobe.conf文件，将其写入ifcfg-bond中，因为在modprobe.conf文件中时，修改了mode模式后，重启网络服务可能不生效。 #V2.0版本更新:将primary网卡设置为可选择项。 trap "tput clear;tput cup 3;echo 'Any Questions: Send a message to QQ 1037509307.';tput cup 6;exit" 2 3 if [[ -n $1 ]]; then cat </ {print $1}' | grep -wEv '^bond[0-9]+'` #已经存在的绑定网卡 NIC_NAME_bond=`ifconfig -a | awk '/^\/ {print $1}'` #打印出已经是SLAVE的网卡 NIC_NAME_slave=`ifconfig -a | sed -n '/SLAVE/{g;1!p;};h' | awk '{print $1}'` NIC_NAME_slave=${NIC_NAME_slave:=NULL} #打印出可用网卡 NIC_NAME_free=`echo "$NIC_NAME_all" | grep -Fwv "$NIC_NAME_slave"` #可用网卡数量 NIC_NAME_free_nu=`echo "$NIC_NAME_free" | wc -w` declare -a NIC_LIST NIC_LIST=($NIC_NAME_free) info_print(){ tput clear;tput cup 2 cat < /dev/null if [[ $? -eq 0 ]]; then info_print echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m" echo -e "\nThe information you have entered:\nFirst NIC   : $NIC1" echo -e "----------------------------------------------\n" break else info_print echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m" echo -e "----------------------------------------------\n" echo -e "\033[31m${NIC1}\033[0m is not available,Please enter another one." fi done #输入第二块网卡的名称 while true; do echo -e "\nPlease select the second NIC:_\b\c" read NIC2 if [[ ${NIC1} != ${NIC2} ]]; then echo ${NIC_LIST[@]} | grep -Fw "${NIC2}" &> /dev/null if [[ $? -eq 0 ]]; then info_print "${NIC_NAME_bond}" echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}" echo -e "----------------------------------------------\n" break else info_print echo -e "\033[031m$NIC_NAME_free_nu\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m\n\nThe information you have entered:\nFirst NIC   : ${NIC1}" echo -e "----------------------------------------------\n" echo -e "\033[31m${NIC2}\033[0m is not available,Please enter another one." fi else info_print echo -e "\033[031m${NIC_NAME_free_nu}\033[0m network cards available:\n\033[31m${NIC_LIST[@]}\033[0m\n\nThe information you have entered:\nFirst NIC   : ${NIC1}" echo -e "----------------------------------------------\n" echo -e "\033[31m${NIC2}\033[0m is the first NIC,Please enter another one." fi done #输入绑定网卡名称并进行合理性检查 if [[ -z ${NIC_NAME_bond} ]]; then NAME_bond=bond0 info_print echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}" echo -e "----------------------------------------------\n" echo "The default first bond name is -- bond0." else while true; do echo -e "\nPlease enter a bond name[bonN]:_\b\c" read NAME_bond #检查输入格式是否为bond+数字的格式。 echo "${NAME_bond}" | grep -wE '^bond[[:digit:]]+$' &> /dev/null if [[ $? -eq 0 ]]; then echo "${NIC_NAME_bond}" | grep -Fw "${NAME_bond}" &> /dev/null if [[ $? -ne 0 ]]; then info_print "${NIC_NAME_bond}" echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}" echo -e "----------------------------------------------\n" break else info_print "${NIC_NAME_bond}" echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}" echo -e "----------------------------------------------\n" echo "You can not use an existing name: ${NAME_bond}" echo -e "\033[31m${NAME_bond}\033[0m is not available,Please enter another one like -- bondN." fi else info_print "${NIC_NAME_bond}" echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}" echo -e "----------------------------------------------\n" echo -e "\033[31m${NAME_bond}\033[0m is not available,Please enter another one like -- bondN." fi done fi #设置IP地址 while true; do echo -e "\nPlease enter an IP address:_\b\c" read IP_bond echo "${IP_bond}" | grep -owE '^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5]{2})\.){3}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-5]{2})$' &> /dev/null if [[ $? -eq 0 ]]; then info_print echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}\nIP address  : ${IP_bond}" echo -e "----------------------------------------------\n" break else info_print echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}" echo -e "----------------------------------------------\n" echo -e "IP address: \033[31m${IP_bond}\033[0m format errors, please re-enter." fi done #设置netmask while true; do echo -e "\nPls enter the NETMASK[255.255.255.0]:_\b\c" read NETMASK_bond NETMASK_bond=${NETMASK_bond:="255.255.255.0"}  #当变量为NETMASK_bond为空时，给其赋默认值255.255.255.0 echo "$NETMASK_bond" | grep -owE '^(128|192|224|240|248|252|254|255)\.((0|128|192|224|240|248|252|254|255)\.){2}(0|128|192|224|240|248|252|254|255)$' &> /dev/null if [[ $? -eq 0 ]]; then info_print echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}\nIP address  : ${IP_bond}\nnetmask    : ${NETMASK_bond}" echo -e "----------------------------------------------\n" break else info_print echo -e "The information you have entered:\nFirst NIC   : ${NIC1}\nSecond NIC  : ${NIC2}\nbond name   : ${NAME_bond}\nIP address  : ${IP_bond}" echo -e "----------------------------------------------\n" echo -e "Input error.\nPlease enter the correct NETMASK or press ENTER to use 255.255.255.0.\n" fi done #:<    \n\n" exit 1 fi #get device name and ip information SLAVE1_DEV="$1"    #SLAVE1_DEV=ethx SLAVE2_DEV="$2"    #SLAVE2_DEV=ethx BOND_DEV="$3"     #BOND_DEV=bondx SLAVE1=ifcfg-"$1" SLAVE2=ifcfg-"$2" BOND=ifcfg-"$3" BOND_IPADDR="$4" BOND_NETMASK="$5" BOND_DIR=/etc/sysconfig/network-scripts if [ -e $BOND_DIR/$BOND ] then echo $BOND_DIR/$BOND is already exist else #file backup Check_BakFile "${BOND_DIR}/ifcfg-*" "${BOND_DIR}/inspur_bak" "-M" #get mac address SLAVE1_MAC=`grep 'HWADDR' ${BOND_DIR}/${SLAVE1}` SLAVE2_MAC=`grep 'HWADDR' ${BOND_DIR}/${SLAVE2}` # modify $BOND touch $BOND_DIR/$BOND echo "DEVICE=${BOND_DEV}" >> $BOND_DIR/$BOND echo "BOOTPROTO=none" >> $BOND_DIR/$BOND echo "ONBOOT=yes" >> $BOND_DIR/$BOND echo "TYPE=Ethernet" >> $BOND_DIR/$BOND echo "USERCTL=no" >> $BOND_DIR/$BOND echo "IPV6INIT=no" >> $BOND_DIR/$BOND echo "PEERDNS=yes" >> $BOND_DIR/$BOND echo "IPADDR=${BOND_IPADDR}" >> $BOND_DIR/$BOND echo "NETMASK=${BOND_NETMASK}" >> $BOND_DIR/$BOND if [[ ${get_primary_NIC} == none ]]; then echo "BONDING_OPTS=\"miimon=100 ${mode_bond}\"" >> $BOND_DIR/$BOND else echo "BONDING_OPTS=\"miimon=100 ${mode_bond} primary=$(echo ${SLAVE1} | cut -d'-' -f2)\"" >> $BOND_DIR/$BOND fi # modify $SLAVE1 > $BOND_DIR/$SLAVE1 echo "DEVICE=${SLAVE1_DEV}" >> $BOND_DIR/$SLAVE1 echo 'BOOTPROTO=none' >> $BOND_DIR/$SLAVE1 #cat $BOND_DIR/../ifcfg-bak/$SLAVE1 |grep HWADDR >> $BOND_DIR/$SLAVE1 echo "#$SLAVE1_MAC" >> $BOND_DIR/$SLAVE1 echo ONBOOT=yes >> $BOND_DIR/$SLAVE1 echo TYPE=Ethernet >> $BOND_DIR/$SLAVE1 echo USERCTL=no >> $BOND_DIR/$SLAVE1 echo IPV6INIT=no >> $BOND_DIR/$SLAVE1 echo PEERDNS=yes >> $BOND_DIR/$SLAVE1 echo SLAVE=yes >> $BOND_DIR/$SLAVE1 echo MASTER=$BOND_DEV >> $BOND_DIR/$SLAVE1 # modify SLAVE2 > $BOND_DIR/$SLAVE2 echo "DEVICE=$SLAVE2_DEV" >> $BOND_DIR/$SLAVE2 echo BOOTPROTO=none >> $BOND_DIR/$SLAVE2 #cat $BOND_DIR/../ifcfg-bak/$SLAVE2 |grep HWADDR >> $BOND_DIR/$SLAVE2 echo "#$SLAVE2_MAC" >> $BOND_DIR/$SLAVE2 echo ONBOOT=yes >> $BOND_DIR/$SLAVE2 echo TYPE=Ethernet >> $BOND_DIR/$SLAVE2 echo USERCTL=no >> $BOND_DIR/$SLAVE2 echo IPV6INIT=no >> $BOND_DIR/$SLAVE2 echo PEERDNS=yes >> $BOND_DIR/$SLAVE2 echo SLAVE=yes >> $BOND_DIR/$SLAVE2 echo MASTER=$BOND_DEV >> $BOND_DIR/$SLAVE2 [[ -e /etc/modprobe.conf.bak ]] && cp /etc/modprobe.conf /etc/modprobe.conf.bak.new || cp /etc/modprobe.conf /etc/modprobe.conf.bak echo "alias $BOND_DEV bonding" >> /etc/modprobe.conf while true; do tput clear;tput cup 2 cat <

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