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Re: [lvs-users] local load balancing (director = realserver)?

To: Tomasz Chmielewski <mangoo@xxxxxxxx>
Subject: Re: [lvs-users] local load balancing (director = realserver)?
Cc: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Wed, 19 May 2010 10:03:49 +0900
On Tue, May 18, 2010 at 03:19:19PM +0200, Tomasz Chmielewski wrote:
> Is it possible to do such balancing with LVS?
> 
>          /realserver_1
> director
>          \realserver_2
> 
> 
> Everything is in LAN.
> Both "director" and "realserver_1" are the same machine.
> 
> 
> Now, I would like to connect from any of the to machines to either 
> realserver_1 or realserver_2 ("round robin"):
> 
> realserver_1$ telnet address 25
> 220 realserver_1 ESMTP ...
> 
> realserver_1$ telnet address 25
> 220 realserver_2 ESMTP ...
> 
> 
> realserver_2$ telnet address 25
> 220 realserver_1 ESMTP ...
> 
> realserver_2$ telnet address 25
> 220 realserver_2 ESMTP ...
> 
> 
> Can I do it with LVS?

Yes, typically this can be done using LVS-DR.
Be careful about the way you manage the VIP - it will likely
need to be on lo on the director and ethX on the other machine.
And also be careful to handle the arp problem.

http://www.ultramonkey.org/3/topologies/sl-ha-lb-eg.html


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