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Re: [lvs-users] LVS/Nat and source natting

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVS/Nat and source natting
From: "luca boncompagni" <lbonco@xxxxxxxxx>
Date: Thu, 27 Nov 2008 23:48:19 +0100
Hi,

I need to map different ports on the real server:

  VIP:80
       R1:9080
       R1:9081
       R1:9082
       R2:9080
       R2:9081
       R2:9082

Do you suggest to do something like:

_______________________________________________________________
      |               |              |               |
C=10.3.136.23   VS=10.3.136.24  R1=192.168.10.1  R2=192.168.10.2
 _____________   _____________   _____________   _____________
|             | |             | |             | |             |
|   client    | |  director   | | realserver1 | | realserver2 |
|_____________| |_____________| |_____________| |_____________|


By the way, is there any way to do SNAT with LVS?

Thanks,
Luca



On Thu, Nov 27, 2008 at 9:27 PM, Jose Ildefonso Camargo Tolosa
<ildefonso.camargo@xxxxxxxxx> wrote:
> Hi!
>
> 1. Any particular reason why you need to use NAT for load-balancing on
> the same network segment? why not try DR instead?
> 2. If you really need NAT, you could create a "servers network" (it
> doesn't matter if they are on the same network segment, you just need
> them to be on different networks, ej. 192.168.1.0/24).
>
> On Fri, Nov 28, 2008 at 2:16 PM, luca boncompagni <lbonco@xxxxxxxxx> wrote:
>> Hi all,
>>
>> I need to balance a cluster of servers inside the same subnet as below:
>>
>> _______________________________________________________________
>>       |               |              |               |
>> C=10.3.136.23   VS=10.3.136.24  R1=10.3.136.25   R2=10.3.136.26
>>  _____________   _____________   _____________   _____________
>> |             | |             | |             | |             |
>> |   client    | |  director   | | realserver1 | | realserver2 |
>> |_____________| |_____________| |_____________| |_____________|
>>
>> The director is a debian/testing with
>>   - kernel 2.6.26-1-686
>>   - ipvsadm v1.24 2005/12/10 (compiled with popt and IPVS v1.2.0)
>>
>> I use:
>>
>> ipvsadm -A -t 10.3.136.24:80 -s rr
>> ipvsadm -a -t 10.3.136.24:80 -r 10.3.136.25:80 -m
>> ipvsadm -a -t 10.3.136.24:80 -r 10.3.136.26:80 -m
>>
>> and i try with:
>>
>> iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to 10.3.136.24
>>
>> but SNAT is not working.
>>
>> How can I do?
>>
>> Thanks,
>> Luca
>>
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>>
>
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