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:0c4.脚本代码
#!/bin/bash
# Date:2018-11-26 14:28:45
# Author:ZhangJian
# Mail:[email protected]
# 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 "${IP_bond}" | grep -owE '^(([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([1-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-4])$' &> /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 <