要求:将两张网卡绑定为一张网卡,em1为主,em2为备
一、将原来的两张网卡的配置文件备份
[root@localhost network-scripts]# mv ifcfg-em1 ifcfg-em1.bak [root@localhost network-scripts]# mv ifcfg-em2 ifcfg-em2.bak
二、新建两张网卡新配置文件
[root@localhost network-scripts]# vim ifcfg-em1 TYPE=Ethernet BOOTPROTO=none USERCTL=no DEVICE=em1 ONBOOT=yes MASTER=bond0 SLAVE=yes
[root@localhost network-scripts]# vim ifcfg-em2 TYPE=Ethernet BOOTPROTO=none USERCTL=no DEVICE=em2 ONBOOT=yes MASTER=bond0 SLAVE=yes
三、新建ifcfg-bond0文件
[root@localhost network-scripts]# vim ifcfg-bond0 TYPE=Ethernet BOOTPROTO=none ONBOOT=yes USERCTL=no DEVICE=bond0 IPADDR=34.34.30.21 NETMASK=255.255.255.0 GATEWAY=34.31.30.1 DNS1=8.8.8.8 DNS2=202.106.0.20 NM_CONTROLLED=no
四、新建/etc/modprobe.d/bonding.conf文件
[root@localhost network-scripts]# vim /etc/modprobe.d/bonding.conf alias bond0 bonding options bond0 miimon=100 mode=1
设置开机使网卡绑定生效
[root@localhost network-scripts]# vim /etc/rc.d/rc.local
在文件最后加入一行
ifenslave bond0 em1 em2
五、停止系统NetworkManager服务
[root@localhost network-scripts]# systemctl stop NetworkManager
[root@localhost network-scripts]# systemctl disable NetworkManager
六、重启network服务
[root@localhost network-scripts]# systemctl restart network
状态检查
[root@localhost network-scripts]# ifconfig -a bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 1500 inet 172.28.5.124 netmask 255.255.255.128 broadcast 172.28.5.127 inet6 fe80::529a:4cff:fe8b:8b6a prefixlen 64 scopeid 0x20<link> ether 50:9a:4c:8b:8b:6a txqueuelen 1000 (Ethernet) RX packets 4936 bytes 360383 (351.9 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 199 bytes 47662 (46.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 em1: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500 ether 50:9a:4c:8b:8b:6a txqueuelen 1000 (Ethernet) RX packets 82685 bytes 79127730 (75.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 41753 bytes 4315831 (4.1 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 em2: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500 ether 50:9a:4c:8b:8b:6a txqueuelen 1000 (Ethernet) RX packets 24229 bytes 1699544 (1.6 MiB) RX errors 1 dropped 0 overruns 0 frame 1 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 17 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 150 bytes 13786 (13.4 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 150 bytes 13786 (13.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
可以发现bond0、em1 、em2三个网卡的MAC地址是一样的
[root@localhost network-scripts]# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: em1 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: em1 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 50:9a:4c:8b:8b:6a Slave queue ID: 0 Slave Interface: em2 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 50:9a:4c:8b:8b:6b Slave queue ID: 0 [root@localhost network-scripts]#
可以看到当前主网卡为em1
七、测试
将网卡em1网线拨出，再次执行
[root@localhost network-scripts]# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: fault-tolerance (active-backup) Primary Slave: None Currently Active Slave: em2 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: em1 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 50:9a:4c:8b:8b:6a Slave queue ID: 0 Slave Interface: em2 MII Status: up Speed: 100 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 50:9a:4c:8b:8b:6b Slave queue ID: 0 [root@localhost network-scripts]#
当前活动网卡变成em2了
这里需要注意：如果使用了keepalived做高可用架构，需要修改keepalived的配置文件，将vip绑定到bond0网卡上，而不是之前的em1
vrrp_instance VI_2 { #配置虚拟路由实 state BACKUP #定义该节点为MASTER节点 interface bond0 #定义VIP绑定的物理网卡 virtual_router_id 60 #设置虚路由拟路由id，同一集群的节点群必须相同 priority 95 #设定优先级 ......
并且防火墙需要放行bond网卡的vrrp数据包，之前是配置放行em1的vrrp数据包
[root@localhost network-scripts]# firewall-cmd --direct --permanent --add-rule ipv4 filter INPUT 0 --in-interface bond0 --destination 224.0.0.18 --protocol vrrp -j ACCEPT [root@localhost network-scripts]# firewall-cmd --direct --permanent --add-rule ipv4 filter OUTPUT 0 --in-interface bond0 --destination 224.0.0.18 --protocol vrrp -j ACCEPT [root@localhost network-scripts]# firewall-cmd --reload
八、解绑
[root@localhost network-scripts]# cd /etc/sysconfig/network-scripts/ [root@localhost network-scripts]# mv ifcfg-bond0 ifcfg-bond0.bak [root@localhost network-scripts]# mv ifcfg-em1 ifcfg-em1-bond.bak [root@localhost network-scripts]# mv ifcfg-em2 ifcfg-em2-bond.bak
将原来备份的网卡配置文件恢复
[root@localhost network-scripts]# mv ifcfg-em1.bak ifcfg-em1 [root@localhost network-scripts]# mv ifcfg-em2.bak ifcfg-em2
更名bonding.conf 以及卸载bonding驱动
[root@localhost network-scripts]# mv /etc/modprobe.d/bonding.conf /etc/modprobe.d/bonding.conf.bak
[root@localhost network-scripts]# rmmod bonding
重启network服务
[root@localhost network-scripts]# systemctl restart network
启动NetworkManager服务
[root@localhost network-scripts]# systemctl start NetworkManager
[root@localhost ~]# systemctl enable NetworkManager
删除或者注释掉开机启动文件中的配置
[root@localhost network-scripts]# vim /etc/rc.d/rc.local touch /var/lock/subsys/local #ifenslave bond0 em1 em2