網路介面配置--Bonding，網路介面--bonding

網路介面配置--Bonding，網路介面--bonding

Bonding

就是講到快網卡綁定到同一IP地址對外服務，可以實現高可用或者負載平衡。當然，直接給兩塊網卡設定同一IP地址是不可能的。通過bonding，虛擬一塊網卡對外提供串連，物理網卡被修改為同一MAC地址。

一 Bonding 的工作模式

    Mode 0 (balance-rr)

輪轉（Round-robin）策略：從頭到尾順序的在每一個slave介面上面發送資料包。本模式提供負載平衡和容錯的能力。

    Mode 1 (active-backuop)

活動-備份（主備）策略：在綁定中，只有一個slave被啟用，當且僅活動的slave介面失敗是才會啟用其他的slave。為了避免交換器發生混亂此時綁定的MAC地址只有一個外部連接埠上可見。

    Mode 3 (broadcast)

廣播策略：在所有的slave介面上發送所有的報文。本模式提供容錯能力。

二 Bonding配置

1 建立bonding裝置的設定檔

[root@CentOS68 ~]# vim /etc/sysconfig/network-scripts/ifcfg-bond0

DEVICE=bond0

BOOTPROTO=none

BONDING_OPTS="miimon=100 mode=0"

IPADDR=200.200.200.200

PREFIX=24

GATEWAY=200.200.200.1

miimon是設定檢測鏈路的時間，單位為毫秒。如果miimon=100，那麼系統每100毫秒檢測一側鏈路的串連狀態，如果有一條線路不通就轉入另一條線路。

mode用來指定模式

2 建立slave的設定檔

既就是要加入的網卡的設定檔，這裡使用eth1、eth2兩塊網卡，下來修改兩塊網卡的配置

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

DEVICE=eth1

TYPE=Ethernet

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=0

MASTER指定測網卡屬於哪個bond。SLAVE指定從屬關係。USERCTL指定使用者是否有控制許可權。

eth2和eth1配置類似

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

DEVICE=eth2

TYPE=Ethernet

BOOTPROTO=none

MASTER=bond0

SLAVE=yes

USERCTL=0

3 重啟網路服務

[root@CentOS68 ~]# service NetworkManager stop #centos6上不穩定，建議關閉[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 ]

 

可以看到已經啟動成功，再來看下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,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

9: bond0: <BROADCAST,MULTICAST,MASTER,UP,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地址已經生效，並且MAC地址都相同。

4 查看bond0的狀態

[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，一切都很順利

5 刪除bond

[root@CentOS68 ~]# ifconfig bond0 down[root@CentOS68 ~]# rmmod bonding

看下是否刪除成功，

[root@CentOS68 ~]# ifconfig bond0

bond0: error fetching interface information: Device not found

已經找不到bond0，說明刪除成功。

詳細協助：/etc/share/doc/kernel-doc-version/Documentation/networking/bonding.txt

 

三 nmcli實現bonding

 1 添加bonding介面

[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添加從屬介面

[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：如沒有指定從屬介面串連名，則該名稱是介面名稱加類型構成

3 啟動從屬介面

[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 啟動bonding 綁定

[root@centos7 ~]# nmcli connection up mybond0

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

5 查看綁定

[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 刪除bond綁定

（1）關閉bond

[root@centos7 ~]# nmcli connection down mybond0

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

[root@centos7 ~]#

（2）刪除bond

[root@centos7 ~]# nmcli connection delete mybond0

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

（3）刪除從屬介面

[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