网络高可用设计

掌握要点

（1）熟悉 bonding 的工作模式、功能、使用场景等。

（2）熟悉 bonding 模式的工作原理。

（3）熟悉各个 bonding 模式的配置方法。

节点规划

IP 地址	网卡名称	bond 名称
192.168.100.10	ens33、ens34	bond

网卡做 bond0 模式

1.ens33 网卡配置信息

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE="Ethernet" 
BOOTPROTO="none" 
NAME="ens33" 
DEVICE="ens33" 
ONBOOT="yes"  
MASTER="bond" 
SLAVE="yes" 

2.ens34 网卡配置信息

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens34 
TYPE="Ethernet" 
BOOTPROTO="none" 
NAME="ens34" 
DEVICE="ens34" 
ONBOOT="yes" 
MASTER="bond" SLAVE="yes" 

3.创建 bond0 网卡配置文件

需要用到什么模式在mode中可以修改相应的数字。

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-bond 
DEVICE=bond 
TYPE=Bond 
IPADDR=192.168.100.10 
NETMASK=255.255.255.0 
GATEWAY=192.168.100.1 
USERCTL=no 
BOOTPROTO=none 
ONBOOT=yes 
BONDING_MASTER=yes 
BONDING_OPTS="mode=0 miimon=100" 

4.重启网卡服务

[root@localhost ~]# systemctl restart network 
[root@localhost ~]# ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 
    inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever 
    inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 
2: ens33: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond state UP qlen 1000     
	link/ether 00:0c:29:5b:43:41 brd ff:ff:ff:ff:ff:ff 
3: ens34: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond state UP qlen 1000     
	link/ether 00:0c:29:5b:43:41 brd ff:ff:ff:ff:ff:ff 
5: bond: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000     
	link/ether 00:0c:29:5b:43:41 brd ff:ff:ff:ff:ff:ff     
	inet 192.168.100.10/24 brd 192.168.100.255 scope global bond        
	valid_lft forever preferred_lft forever     
	inet6 fe80::20c:29ff:fe5b:4341/64 scope link tentative dadfailed         
	valid_lft forever preferred_lft forever 

5.查看 bond 状态信息

[root@localhost ~]# cat /proc/net/bonding/bond  
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: ens33 
MII Status: up 
Speed: 1000 Mbps 
Duplex: full 
Link Failure Count: 0 
Permanent HW addr: 00:0c:29:5b:43:41 
Slave queue ID: 0 
 
Slave Interface: ens34 
MII Status: up 
Speed: 1000 Mbps 
Duplex: full 
Link Failure Count: 0 
Permanent HW addr: 00:0c:29:5b:43:4b 
Slave queue ID: 0