How can I flush the connection table?

[Ken Brownfield]

In my experience, I've had to remove the real server entirely when I  
have persistence active.  Unless of course you're willing to wait an  
hour :).  But I also have had new connections continue to trickle in  
to a zero-weight real server in the absence of persistence, so I  
think there's also a general issue where a zero weight isn't  
literally zero.

I remove real servers within health monitoring in the general case,  
as opposed to zero-weighting them.  If zero worked as expected, that  
slightly drastic measure (hard connection interruptions, orphans)  
wouldn't be necessary.

Good luck,
-- 
Ken.


On Jun 13, 2006, at 6:13 AM, Hildebrand, Nils, 122 wrote:

> Hi,
>
> I subscribed to the mailing list, because I had a major problem  
> with ipvsadm
> today.
>
> I am using ipvsadm v1.24 on a SuSE 9.3 professional (Kernel
> 2.6.11.4-21.11-smp).
>
> For configuring lvs I use lvs-kiss.
>
> I am doing a load-balancing for two webservers.
>
> Now the problem:
> The service is configured with a persistency of one hour.
>
> After some clients connected through lvs to Webserver #2 the  
> Webserver #2
> went down.
> Some seconds later lvs-kiss realized the servers was down and set  
> the weight
> for that server to zero.
>
> BUT: Clients were still trying to connect to Webserver #2.
>
> After I looked at "ipvsadm -Lc" I found that their old connection  
> was still
> there and the timeout-value for Webserver#2 got reset to one hour  
> againg
> after every try.
>
> I would have expected that all Webserver #2-connections will get  
> invalidated
> and that the client-retry would then go to Webserver #1.
>
> What's wrong here?
>
> BTW: Is there any way to zero the connection-table?
> ipvsadm -Zc oder -Cc does not work...
>
>
> Kind regards, Nils
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