That's the problem . We did have a hardware issue on the NIC and the load balancer kept putting the server live / dead all the time. Unfortunately the NIC wasn't monitored so we had no idea the NIC was flapping. (This has is now monitored)
My issue that the NIC flapping caused the load balancer to flap and that caused a lot of customer issues which impacted revenue for the business :-( It would have been better for that server to have marked dead and the servers under the load balancer would have taken over. My reasoning is that if there is a weird hardware / server fault or its flapping for too long / too many times, I want the load balancer to mark the server dead. I can then pick that up with my monitoring. Or is there a better strategy? John On Fri, Feb 3, 2012 at 1:43 AM, Baptiste <[email protected]> wrote: > Hey, > > According to me, it's easier to change the NIC, since your > intermittent issues may happen under load only. > > With HAProxy, I can't see anything you can currently do to avoid this > behavior. > I mean that NIC intermittent issues may happen under load, so haproxy > would consider server down. > load decreasing, NIC will work properly again and haproxy would > consider server operational. > and so on for a lonnnnnnnnnng time. > > Don't try to hide a hardware issue using a load-balancer... > > cheers > > > On Thu, Feb 2, 2012 at 4:28 AM, John Clegg <[email protected]> wrote: > > Hi > > > > I'm trying to understand how ensure backserver which is failing and > > classified as dead stays dead. > > > > I've just had an instance on another server which is using another > > load-balancer where the NIC has intermittently failing and it caused the > > load-balancer to flap constantly. > > > > I would like to set a threshold where if the back-end service fails that > it > > says dead, it stays dead and needs to be manually re-added to > > load-balancer. > > > > I'm trying to understand how the rise and fall settings (plus other > config > > settings) can achieve this, or if there is another approach. > > > > Any ideas would be appreciated. > > > > Regards > > > > John > > > > -- > > > > John Clegg > > Dash Tickets > > http://www.dashtickets.co.nz > > > -- John Clegg Chief Technical Officier Dash Tickets Phone: +64 4 831 5480 x805 http://www.dashtickets.co.nz
