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Re: Failover with load balancing of SSL

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Failover with load balancing of SSL
Cc: Wensong Zhang <wensong@xxxxxxxxxxxx>
From: Horms <horms@xxxxxxxxxxxx>
Date: Fri, 26 Nov 2004 17:15:43 +0900
On Thu, Nov 25, 2004 at 09:59:26AM +0000, Malcolm Turnbull wrote:
> Nicola,
> 
> you definately want quiescent=no.
> What version of ldirectord are you using ?

Or use this patch.
http://www.in-addr.de/pipermail/lvs-users/2004-February/011018.html

Wensong, can you considered including this?

> Regards,
> Malcolm
> 
> Nicola Pero wrote:
> 
> >Has anyone been able to setup ldirectord to load balance two HTTPS servers
> >with failover ?
> >
> >The two real HTTPS servers are stateless (except for the SSL info in the
> >web servers); there are few concurrent users (up to 10), but instant
> >switchover in case of failure is essential.
> >
> >Anyway, the problem we have is that when one of the two HTTPS servers goes
> >down, the load balancer detects it but all clients connected to the server
> >which is down keep being sent to it.  Changing 'persistent', 'quiescent',
> >timeouts etc didn't seem to have any effect on this!
> >
> >Our case is also complicated by the fact that in certain cases we might
> >decide that a real server should not be used even if HTTPS is still
> >running fine on the server.  That might happen if the application sitting
> >behind the HTTPS has a problem.  We've got a URL on the real server which
> >can be checked to know if the realserver is OK to be used or not.  
> >Checking those seems to be working fine!  The problem is with the
> >realserver being marked as down, and all requests still being sent to it!
> >
> >Keep in mind this is not a typical web farm, there are few concurrent
> >users (most often 0 or 1), but it's critical that the web application is
> >always available.
> >
> >Thanks
> >
> >_______________________________________________
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> > 
> >
> 
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-- 
Horms

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