Just curious if anyone has done any configuration of an apache front end web
server for a back end mid-tier server. Our server environment requires a DMZ
so we are fronting our mid-tiers through apache servers. What we were not able
to figure out was how to load balance the connection from the mid-tier to the
apache without getting . Our end goal is this:
Load Balancer1
/ | \
/ | \
Apache 1 Apache2 Apache3
\ | /
\ | /
Load Balancer 2
/ | \
/ | \
MT1 MT2 MT3
\ | /
\ | /
Load Balancer 3
|
|
ARS Server Group
Currently we have this:
Load Balancer1
/ | \
/ | \
Apache 1 Apache2 Apache3
| | |
MT1 MT2 MT3
\ | /
\ | /
Load Balancer 3
|
|
ARS Server Group
The reason we wish to move to this configuration is so that if a mid-tier goes
down the user's session does not get lost. In our current configuration if we
bring a mid-tier down for maintenance a user's session must be re-established.
There are several apache modules that handle sessions for you. So we were
wondering if anyone has tried any apache modules and got it to work like that.
Mod_tsession, mod_session, and mod_wl are some of the modules that come to mind
that may help but we have not tried them. I remember BMC told us that we must
have a one to one with apache to make this work (this was told to engineering
and don't really know all the reasons). I was wondering if there have been any
new developments or if anyone has gotten it to work this way even though it may
not be "Supported" by BMC.
Our environment:
Apache 2 front end web servers
Mid-Tier 7.5 patch 6 running on weblogic 10
ARS 7.5 patch 6
Oracle 10g
Thanks,
Sean
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