Re: traffic still going to backends marked as DOWN

Please excuse my ignorance. There were some extenuating circumstances which clearly accounted for this behavior and haproxy is functioning correctly.

-Rupert

On Thu, Sep 11, 2008 at 4:00 PM, Rupert Fiasco <rufiasco#gmail.com> wrote:
> We have the following setup:
>
> nginx -> haproxy (1.3.15.3) -> mongrels
>
> Config is here:
>
> http://pastie.org/270874
>
> Problem: after I start haproxy and then immediately go to the web
> stats it will start checking each backend in turn and when it gets to
> backend 6 and 8 mark them as down. However, in looking at the logs
> traffic is STILL being sent to those mongrels and they are serving it
> up successfully.
>
> How can this be the case? From my understanding, if haproxy marks a
> server as down then it will never send traffic to it. Yet, traffic is
> being sent (and successfully handled) to that backend...
>
> Is there something wrong with my config? In this case, it seems a
> couple of things are going that are odd to me:
>
> 1) Why is haproxy marking it as down
> 2) If haproxy does consider it down (for whatever reasons), why is
> traffic still being sent to it
>
> Now, notice I have chosen to use a TCP check and not an HTTP check
> (since we have other background monitoring agents to actually restart
> a downed service). If I move to an HTTP check that *might* solve
> question #1, but doesnt answer #2.
>
> Thanks in advance
>
> - Rupert
>
Received on 2008/09/12 01:36