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This article mainly explains "Centos load balancing method". The content of this article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "Centos load balancing method".

In order to improve the high availability of the system, we can bind two or more network cards into a virtual network card and use the same ip address to ensure that when one link is down, the other link can be started at any time to improve the stability of the system.

Enable dual network cards in the virtual machine

Finish

The dual network card works as a virtual network card (bond0). The virtual network card also needs to be driven, which is called bonding.

Check whether the kernel supports the binding of dual network cards

Vim / boot/config-2.6.18-164.e15

Indicates that this network model is supported, and BOUNDING is a built-in module

Enter

Use a unified ip after the Nic is bound, so eth0 and eth2 do not need to set ip.

Vim ifcfg-eth0

Vim ifcfg-eth2

Generate additional network card file ifcfg-bond0

Cp ifcfg-eth0 ifcfg-bond0

(address is required for virtual network card bond0)

Vim ifcfg-bond0

Vim / etc/modprobe.conf (in order for the system to load bonding modules)

Add to this file

(delay 100ms for bond0 link monitoring, mode=1 indicates active / standby mode)

Vim / etc/rc.d/rc.local (indicates in the boot script that bond0 is bound to eth0 and eth2 network cards)

Init 6 restart the system

Dmesg | grep bond0 (view relevant information of master / slave mode)

Or cat / proc/net/bonding/bond0

Monitor every other second

Wtach-n 1 'cat / proc/net/bonding/bond'

Backup link eth2 starts automatically when eth0 down falls off

When eth2 down falls, eth0 starts

Thank you for your reading. the above is the content of "Centos load balancing method". After the study of this article, I believe you have a deeper understanding of the method of Centos load balancing, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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