bond切换

由于服务器整框对外提供服务，对外出去的两个交换机做了 bond 的备份模式，这样所有服务器的网络默认都是从同一个交换机出去，导致master交换机很忙，但slave交换机缺很闲，资源得不到合理利用，这时，就需要手工将其中一半的服务器的bond切换到slave交换机上，使交换机资源得到合理利用和分流的效果，具体操作如下：

一、需要查看的相关配置文件：

cat /etc/modprobe.conf
cat /proc/net/bonding/bond0

二、整理整框的主机名：

#cat list
SERVER-HST-01
SERVER-HST-02
SERVER-HST-03
SERVER-HST-04
SERVER-HST-05
SERVER-HST-06
SERVER-HST-07
SERVER-HST-08

三、查看该框主机当前激活的网卡：

#for i in `cat list`;do ssh $i "grep Currently /proc/net/bonding/bond0";done
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0

四、确认master&slave两个网卡的状态都是 up的状态，确保切换后不会出问题：

#for i in `cat list`;do ssh $i "grep MII /proc/net/bonding/bond0";done
MII Status: up
MII Status: up
MII Status: up
MII Polling Interval (ms): 100
MII Status: up
MII Status: up
MII Status: up
MII Polling Interval (ms): 100
MII Status: up
MII Status: up
MII Status: up

五、将其中一半的slave激活：

#for i in `tail -4 list`;do ssh $i "ifenslave -c bond0 eth1";done

六、确认当前激活网卡已经均分：

#for i in `cat list`;do ssh $i "grep Currently /proc/net/bonding/bond0";done
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth0
Currently Active Slave: eth1
Currently Active Slave: eth1
Currently Active Slave: eth1
Currently Active Slave: eth1