Re: [lvs-users] How to make LVS Direct Route work for UDP programs?

To: wang yi <>, lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [lvs-users] How to make LVS Direct Route work for UDP programs?
From: wang yi <>
Date: Fri, 25 Nov 2011 14:48:15 +0800
On Wed, Nov 23, 2011 at 6:23 PM, Simon Horman <horms@xxxxxxxxxxxx> wrote:
> On Wed, Nov 23, 2011 at 05:06:34PM +0800, wang yi wrote:
>> Hi, all
>>     I've set up LVS with DR mode for Apache, it worked OK. Then I set
>> up another Virtual Service for an UDP based program on the same boxes,
>> but it won't work.
>>    Running Wireshark on the director showed that it got the UDP
>> packets from client, but responsed these packets with an ICMP message,
>> Destination unreachable (Port unreachable)
>>    I cannot find any information about this. Anything special about
>> UDP based program?
> Hi Wang,
> there shouldn't be anything particularly special about UDP.
> Do you have a UDP (-u) virtual service configured as well
> as the original TCP (-t) virtual service?

Hi, all

    It turned out that the UDP service configured with the
nice-looking Piranha is not working!

    Simon's post inspired me, so I reconfigured UDP-based virtual
service with ipvsadm in a console, and it worked.

    So, a lesson for those who have problems with LVS using Piranha,
forget about Piranha and try other ways to configure your service.


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