LINUX实操：Linux下网络接口配置--Bonding

发布时间：2020-12-13 17:32:27 所属栏目：Linux 来源：网络整理

导读：《LINUX实操：Linux下网络接口配置--Bonding》要点：本文介绍了LINUX实操：Linux下网络接口配置--Bonding，希望对您有用。如果有疑问，可以联系我们。 Bonding 便是讲到快网卡绑定到同一IP地址对外服务,可以实现高可用或者负载均衡.当然,直接给两块网卡设置

《LINUX实操：Linux下网络接口配置--Bonding》要点：
本文介绍了LINUX实操：Linux下网络接口配置--Bonding，希望对您有用。如果有疑问，可以联系我们。

Bonding

便是讲到快网卡绑定到同一IP地址对外服务,可以实现高可用或者负载均衡.当然,直接给两块网卡设置同一IP地址是不可能的.通过bonding,虚拟一块网卡对外提供连接,物理网卡被修改为同一MAC地址.

一 Bonding 的事情模式

? ? Mode 0 (balance-rr)

轮转(Round-robin)策略：从头到尾顺序的在每一个slave接口上面发送数据包.本模式提供负载均衡和容错的才能.

? ? Mode 1 (active-backuop)

活动-备份(主备)策略：在绑定中,只有一个slave被激活,当且仅活动的slave接口失败是才会激活其他的slave.为了避免交换机产生混乱此时绑定的MAC地址只有一个外部端口上可见.

? ? Mode 3 (broadcast)

广播策略：在所有的slave接口上发送所有的报文.本模式提供容错才能.

二 Bonding设置装备摆设

1 创立bonding设备的配置文件

DEVICE=bond0

BOOTPROTO=none

BONDING_OPTS="miimon=100 mode=0"

IPADDR=200.200.200.200

PREFIX=24

GATEWAY=200.200.200.1

miimon是设置检测链路的时间,单位为毫秒.如果miimon=100,那么系统每100毫秒检测一侧链路的连接状态,如果有一条线路欠亨就转入另一条线路.

mode用来指定模式

2 创立slave的配置文件

既便是要加入的网卡的配置文件,这里使用eth1、eth2两块网卡,下来修改两块网卡的配置

[root@CentOS68 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1

TYPE=Ethernet

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=0

MASTER指定测网卡属于哪个bond.SLAVE指定附属关系.USERCTL指定用户是否有控制权限.

eth2和eth1配置相似

[root@CentOS68 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth2

DEVICE=eth2

TYPE=Ethernet

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=0

3 重启收集服务

[root@CentOS68 ~]# service NetworkManager stop #centos6上不稳定,建议封闭

[root@CentOS68 ~]# service network restart

Shutting down interface bond0: [ OK ]

Shutting down interface eth0: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface bond0: Determining if ip address 200.200.200.200 is already in use for device bond0...

[ OK ]

Bringing up interface eth0: Determining if ip address 192.168.29.68 is already in use for device eth0...

[ OK ]

可以看到已经启动胜利,再来看下IP地址和MAC

[root@CentOS68 ~]# ip a

[……]

7: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000

link/ether 00:0c:29:74:74:45 brd ff:ff:ff:ff:ff:ff

8: eth2: <BROADCAST,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000

link/ether 00:0c:29:74:74:45 brd ff:ff:ff:ff:ff:ff

9: bond0: <BROADCAST,MASTER,LOWER_UP> mtu 1500 qdisc noqueue state UP

link/ether 00:0c:29:74:74:45 brd ff:ff:ff:ff:ff:ff

inet 200.200.200.200/24 brd 200.200.200.255 scope global bond0

inet6 fe80::20c:29ff:fe74:7445/64 scope link tentative dadfailed

valid_lft forever preferred_lft forever

可以看到IP地址已经生效,而且MAC地址都相同.

4 查看bond0的状态

[root@CentOS68 ~]# cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.7.1 (April 27,2011)

?Bonding Mode: load balancing (round-robin)

MII Status: up

MII Polling Interval (ms): 100

Up Delay (ms): 0

Down Delay (ms): 0

Slave Interface: eth1

MII Status: up

Speed: 1000 Mbps

Duplex: full

Link Failure Count: 0

Permanent HW addr: 00:0c:29:74:74:45

Slave queue ID: 0

Slave Interface: eth2

MII Status: up

Speed: 1000 Mbps

Duplex: full

Link Failure Count: 0

Permanent HW addr: 00:0c:29:74:74:4f

Slave queue ID: 0

好了,一切都很顺遂

5 删除bond

[root@CentOS68 ~]# ifconfig bond0 down
?

[root@CentOS68 ~]# rmmod bonding

看下是否删除胜利,

[root@CentOS68 ~]# ifconfig bond0

bond0: error fetching interface information: Device not found

已经找不到bond0,阐明删除成功.

详细赞助：/etc/share/doc/kernel-doc-version/Documentation/networking/bonding.txt

三 nmcli实现bonding

?1 添加bonding接口

[root@centos7 ~]# nmcli connection add type bond con-name mybond0 ifname bond0 mode active-backup

Connection 'mybond0' (cc101e79-3dcb-49ee-8164-89c9e877c315) successfully added.

2添加附属接口

[root@centos7 ~]# nmcli connection add type bond-slave ifname ens34 master mybond0

Connection 'bond-slave-ens34' (9c8ff11a-72ef-4d63-a950-2ab777d2a1ea) successfully added.

[root@centos7 ~]# nmcli connection add type bond-slave ifname ens38 master mybond0

Connection 'bond-slave-ens38' (c40b3e6f-32f4-4d1a-a323-aed2519cf865) successfully added.

注意：如没有指定附属接口连接名,则该名称是接口名称加类型构成

3 启动附属接口

[root@centos7 ~]# nmcli connection up bond-slave-ens34

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/40)

[root@centos7 ~]# nmcli connection up bond-slave-ens38

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/41)

4 启动bonding 绑定

[root@centos7 ~]# nmcli connection up mybond0

Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/48)

5 查看绑定

[root@centos7 ~]# nmcli connection show

NAME UUID TYPE DEVICE

bond-slave-ens34 9c8ff11a-72ef-4d63-a950-2ab777d2a1ea 802-3-ethernet ens34

bond-slave-ens38 c40b3e6f-32f4-4d1a-a323-aed2519cf865 802-3-ethernet ens38

mybond0 cc101e79-3dcb-49ee-8164-89c9e877c315 bond bond0

6 添加IP地址

[root@centos7 ~]# nmcli connection modify mybond0 ipv4.method manual ipv4.addresses 200.1.1.1/24

7 删除bond绑定

(1)封闭bond

[root@centos7 ~]# nmcli connection down mybond0

Connection 'mybond0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/18)

[root@centos7 ~]#

(2)删除bond

[root@centos7 ~]# nmcli connection delete mybond0

Connection 'mybond0' (9ed2f027-bbb1-44d1-87fc-7f7275d7fe70) successfully deleted.

(3)删除附属接口

[root@centos7 ~]# nmcli connection delete bond-slave-ens34

Connection 'bond-slave-ens34' (a46ad620-d4b5-43f9-a73a-447785504a17) successfully deleted.

[root@centos7 ~]# nmcli connection delete bond-slave-ens38

Connection 'bond-slave-ens38' (66b1f44d-ad71-4576-8061-f6cba2b976e8) successfully deleted.

好了

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