centos7双网卡绑定bond #yyds干货盘点#

Posted 2022-01-14 江晓龙的技术博客

centos7双网卡绑定bond

1.bond简介

2.配置bond

以双网卡为例

2.1.配置两块网卡配置信息

[root@k8s-master ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
DEVICE=ens33
MASTER=bond0
SLAVE=yes

[root@k8s-master ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens37
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
DEVICE=ens37
MASTER=bond0
SLAVE=yes

2.2.配置bond网卡信息

[root@k8s-master ~]# vim /etc/sysconfig/network-scripts/ifcfg-bond0 
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
DEVICE=bond0
IPADDR=192.168.81.210
NETMASK=255.255.255.0
GATEWAY=192.168.81.2
DNS=114.114.114.114

2.3.配置内核网卡驱动模式

[root@k8s-master ~]# vim /etc/modprobe.d/bond.conf 
alias bond0 bonding
options bonding mode=6 miimon=200

2.4.重启网卡

[root@k8s-master ~]# systemctl restart network

2.5.查看bond是否生效

[root@k8s-master ~]# ifconfig 
bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST>  mtu 1500
        inet 192.168.81.210  netmask 255.255.255.0  broadcast 192.168.81.255
        inet6 fe80::20c:29ff:fed5:a566  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:d5:a5:66  txqueuelen 1000  (Ethernet)
        RX packets 811  bytes 65115 (63.5 KiB)
        RX errors 0  dropped 187  overruns 0  frame 0
        TX packets 1574  bytes 118007 (115.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ens33: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST>  mtu 1500
        ether 00:0c:29:d5:a5:66  txqueuelen 1000  (Ethernet)
        RX packets 1851  bytes 209289 (204.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1857  bytes 234505 (229.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ens37: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST>  mtu 1500
        ether 00:0c:29:d5:a5:70  txqueuelen 1000  (Ethernet)
        RX packets 457  bytes 39789 (38.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 753  bytes 52110 (50.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

3.自动化配置bond脚本

使用方式：sh boun.sh 网卡模式 IP地址

[root@elk-1 ~/soft]# cat bound.sh
#!/bin/bash
#设置多网卡bond，实现网卡的高可用，提升网卡带宽
#此脚本需要传入两个参数 $1为bond模式  $2为boundIP地址

if [  $# = 2 ] ; then           #判断传入的参数是否为2个
    #定义主机上网卡的名称变量
    NAME1=eno1
    NAME2=eno2
    NAME3=eno3
    NAME4=eno4

    #定义要写入网卡配置文件的网络参数
    IPADDR=$2
    NETMASK=255.255.240.0
    GATEWAY=192.168.1.25
    DNS=114.114.114.114
else
    echo "脚本使用错误！！！！
            格式为：$PWD/$0 [ 0-6 ] ipaddr
    例如：
            $PWD/$0 网卡模式 192.168.1.100"
    exit 1;
fi

#生成bond配置文件
echo "alias bond0 bonding
options bonding mode=$1 miimon=200 " > /etc/modprobe.d/bonding.conf

#判断第一个网卡是否存在，如果存在就生成第一个网卡的配置文件
if [ ! -z $NAME1 ] ;then
    echo "DEVICE=$NAME1
    BOOTPROTO=none
    MASTER=bond0
    SLAVE=yes" > /etc/sysconfig/network-scripts/ifcfg-$NAME1
fi

#判断第二个网卡是否存在，如果存在就生成第二个网卡的配置文件
if [ ! -z $NAME2 ] ;then
    echo "DEVICE=$NAME2
    BOOTPROTO=none
    MASTER=bond0
    SLAVE=yes" > /etc/sysconfig/network-scripts/ifcfg-$NAME2
fi

#判断第三个网卡是否存在，如果存在就生成第三个网卡的配置文件
if [ ! -z $NAME3 ] ;then
    echo "DEVICE=$NAME3
    BOOTPROTO=none
    MASTER=bond0
    SLAVE=yes" > /etc/sysconfig/network-scripts/ifcfg-$NAME3
fi

#判断第四个网卡是否存在，如果存在就生成第四个网卡的配置文件
if [ ! -z $NAME4 ] ;then
    echo "DEVICE=$NAME4
    BOOTPROTO=none
    MASTER=bond0
    SLAVE=yes" > /etc/sysconfig/network-scripts/ifcfg-$NAME4
fi

#生成bond配置文件
echo "DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
IPADDR=$IPADDR
NETMASK=$NETMASK
GATEWAY=$GATEWAY
DNS1=$DNS " >/etc/sysconfig/network-scripts/ifcfg-bond0

#重启网络服务
systemctl  disable NetworkManager
systemctl  stop NetworkManager
modprobe -r bonding
modprobe  bonding
service network restart

#打印网络信息
echo "IPADDR=$IPADDR
NETMASK=$NETMASK
GATEWAY=$GATEWAY
DNS1=$DNS "