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Hi Luc,
Same problem, same topology, but using debian 6 and keepalive 1.2.2 ....
without solution yet......
[]´s
Victor
2011/7/4 Luc van Donkersgoed <luc@xxxxxxxxxxxxxxxxxx>
> Hi all,
>
> I'm running a small apache cluster (2 loadbalancers in active-passive
> setup, 2 realservers serving HTTP and HTTPS).
>
> All machines are Dell PowerEdge (R200 and R410 series), not older than 2
> years, running Ubuntu 11.04 with all packages updated.
>
> My loadbalancers are configured with:
>
> Heartbeat 3.0.4
> Linux Director v1.186-ha
> ipvsadm v1.25 2008/5/15 (compiled with popt and IPVS v1.2.1)
>
> ==== ldirectord.cf ====
>
> checktimeout=10
> checkinterval=2
> autoreload=no
> logfile="local0"
> quiescent=no
>
> virtual=x.y.z.141:80
> real=x.y.z.135:80 gate 50
> real=x.y.z.136:80 gate 50
> fallback=127.0.0.1:80 gate
> service=http
> request="ldirector.html"
> receive="Test Page"
> scheduler=wrr
> protocol=tcp
> checktype=negotiate
>
> virtual=x.y.z.141:443
> real=x.y.z.135:443 gate 50
> real=x.y.z.136:443 gate 50
> fallback=127.0.0.1:80 gate
> service=https
> request="ldirector.html"
> receive="Test Page"
> scheduler=wrr
> protocol=tcp
> checktype=negotiate
>
> ==== ipvsadm -ln ====
>
> IP Virtual Server version 1.2.1 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP x.y.z.141:80 wrr
> -> x.y.z.135:80 Route 50 110 51
> -> x.y.z.136:80 Route 50 103 59
> TCP x.y.z.141:443 wrr
> -> x.y.z.135:443 Route 50 12 14
> -> x.y.z.136:443 Route 50 12 6
>
> ==== the problem ====
>
> When I (re)start my loadbalancer, the load is evenly balanced over my two
> realservers. The output of ipvsadm -ln is at that moment comparable to the
> output above. This is all as I would expert. Then, after somewhere between
> 30 minutes and 2 hours, the results of ipvsadm -ln changes to something like
> this, while the load on the webservers does not significantly change:
>
> IP Virtual Server version 1.2.1 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP x.y.z.141:80 wrr
> -> x.y.z.135:80 Route 50 0 1
> -> x.y.z.136:80 Route 50 1 1
> TCP x.y.z.141:443 wrr
> -> x.y.z.135:443 Route 50 2 1
> -> x.y.z.136:443 Route 50 1 0
>
> Around the same time, the loadbalancer seems to become unbalanced, sending
> all requests to one server. This is not always the same server, it seems to
> be random. This server then becomes heavily loaded, while the other server
> is idling. After a while (perhaps 30 minutes) the loadbalancer starts to
> send packages to the unused realserver again. A little while after that, the
> balance tips again, often preferring the other server this time.
>
> The problem is always solved by restarting heartbeat, at which time the
> other loadbalancer takes over and starts to distribute the load evenly
> again. Then, after a while, this server starts to display the same issue.
>
> A source for my problem might be found when running ipvsadm -ln --stats,
> which displays the following:
>
> IP Virtual Server version 1.2.1 (size=4096)
> Prot LocalAddress:Port Conns InPkts OutPkts InBytes
> OutBytes
> -> RemoteAddress:Port
> TCP x.y.z.141:80 20899 198954 0 21196756 0
> -> x.y.z.135:80 10449 101877 0 10743318 0
> -> x.y.z.136:80 10450 97077 0 10453438 0
> TCP x.y.z.141:443 2852 46171 0 8971996 0
> -> x.y.z.135:443 1426 23411 0 4485847 0
> -> x.y.z.136:443 1426 22760 0 4486149 0
>
> This would suggest that the number of connections are still evenly
> distributed over the two realservers, even if the realservers themselves
> don't agree.
>
> Can anyone help me locate the reason for the round robin scheduler not
> distributing my requests evenly?
>
> Thanks in advance,
> Luc van Donkersgoed
> _______________________________________________
> Please read the documentation before posting - it's available at:
> http://www.linuxvirtualserver.org/
>
> LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
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>
_______________________________________________
Please read the documentation before posting - it's available at:
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LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to http://lists.graemef.net/mailman/listinfo/lvs-users
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