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Hello,
even though I have red a lot mails from the list, I haven't found a case
like our.
We have some trouble with our LVS-Cluster. Since a while we
evaluate a 6 Node-Cluster (3 Realserver/1Devel/2Directors) as a Mail
Gateway.
The Setup is the following:
The 2 Director (failover) running direct routing.
Setup is done by ldirectord(1.77.2.41) which is
invoked by heartbeat.
Addionally there are two drbd-devices for some
configfiles and data (no ldirectord data/config in there).
On the realserver is some MTA(postfix,amavisd-new etc.) running.
When we starting the setup everything is running fine, the heartbeat
comes up and starts the ldirectord with the following config:
-------------------------------------------------
# Global Directives
checktimeout=10
checkinterval=2
autoreload=yes
quiescent=yes
#Sample configuration for an smtp virtual service.
#Fallback setting overides global
virtual=10.10.x.60:25
real=10.10.x.63:25 gate 100
real=10.10.x.64:25 gate 100
real=10.10.x.65:25 gate 100
service=smtp
scheduler=lc
checkport=25
checktype=connect
protocol=tcp
-------------------------------------------------
so ipvsadm -Ln gives us the following output:
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IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.10.x.60:25 lc
-> 10.10.x.63:25 Route 100 0 0
-> 10.10.x.64:25 Route 100 0 0
-> 10.10.x.65:25 Route 100 0 0
-------------------------------------------------
Everything works fine and the Director balances the incoming connections
to the 3 realservers.
But after a while (sorry dont know a specific time) the LB stops
sceduling and the incoming connections will send to the last choosen
realserver. Really strange is that after this happens, you can unload
the modules (ip_vs/ip_vs_lc) and after the ip_vs module got reloaded the
traffic continues send to the last realserver.
For testing i've writen the output of ipvsadm -Ln( and c) with timestamp
to a file. The last entry was this:
IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Conns InPkts OutPkts InBytes
OutBytes
-> RemoteAddress:Port
TCP 10.10.x.60:25 17617 1872891 0 2541M 0
-> 10.10.x.63:25 5927 614901 0 832431K 0
-> 10.10.x.64:25 5964 663196 0 902503K 0
-> 10.10.x.65:25 5726 594794 0 806841K 0
(No outgoing Pakets, because the mails are dropping in a sink)
Restarting the ldirectord has the same effect, everthing continues doing
wrong.
I cant get a conclusion out of the symptoms.
Every help is appreciated and thanks for your time reading this.
Jan
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