We have been using lvs in several situations with great success. One of the
implementations is for Microsoft Terminal Services. we are load balancing over
a couple of servers. we like for the users to return to the same server when
possible because of applications running on the servers. we have persistence
set to 6 hours (I know, long time) and what I have just figured out is that the
6 hours starts on the initial connection and doesn't get reset unless they
disconnect and reconnect. so if a user connects and gets routed to a terminal
server the clock starts, if they just sit and do work for the next 5 hours and
30 minutes, then disconnect leaving apps running, and then come back after 6
hours that timer has expired and they get routed to a different server
(potentially), causing licensing issues with the apps they were running.
Looking at the connection table ipvsadm -Lc I see a line for the 6 hour timer
and another line for the established connection and another fin_wait that I am
not sure what its for.
TCP 359:41 NONE lt1150cdc.domain.com:0 tbcsrv970.domain.com:3389
tbcsrv973.domain.com:3389
TCP 14:59 ESTABLISHED lt1150cdc.domain.com:53087 tbcsrv970.domain.com:3389
tbcsrv973.domain.com:3389
TCP 01:41 FIN_WAIT lt1150cdc.domain.com:53086
As soon as I disconnect the established changes to a fin_wait. So my question
is, is it possible for the timer to start on a disconnect, or is there another
approach I need to take so that the persistence is after an active connection?
here is my config:
#global options
checktimeout=20
checkinterval=4
autoreload=yes
quiescent=no
virtual = 10.72.5.4:3389
protocol=tcp
scheduler=wlc
checkport=3389
checktype=connect
real=10.72.5.5:3389 gate 1
real=10.72.5.6:3389 gate 1
real=10.72.5.7:3389 gate 1
# real=10.12.1.40:3389 gate 1
persistent=21600
I might have babbled a little bit so if I can clear up my question or answer
other questions please let me know.
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