{"id":46,"date":"2006-09-11T11:52:00","date_gmt":"2006-09-11T15:52:00","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=46"},"modified":"2008-06-25T14:53:43","modified_gmt":"2008-06-25T18:53:43","slug":"hardware-load-balancing-at-http-layer-in-apps-contd","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2006\/09\/11\/hardware-load-balancing-at-http-layer-in-apps-contd\/","title":{"rendered":"Hardware Load balancing at HTTP Layer in Apps Contd.."},"content":{"rendered":"

If you are accessing this page directly without reading previous post about load balancer & broad level steps of configuring load balancer in Apps then first check previous posts mentioned at bottom
\n<\/strong>
\nAfter configuring Load Balancer in Oracle Applications 11i you as Apps DBA need to apply three prereq. patches<\/p>\n

Patch 3175852<\/strong> – This patch will give tags in CONTEXT file ( xml file) required to configure load balancer , I’ll discuss on these tags in this post later
\nPatch 3077386<\/strong> – This is for logout issue which is not function properly
\nPatch 3209878<\/strong> – Only if you are using Oracle Configurator<\/p>\n

If you are on apps 11.5.10 or above , these patches are already included .<\/p>\n

After these patches you need to clone from existing tier to one more middle tier ( If existing middle tier include Concurrent Manager & Reports Node , don’t configure target instance for CM or Reports as I suppose you don’t want to configure PCP more coming on PCP in future posts<\/span> you just need load balancing on HTTP Layer). I suppose you are already aware that while running adcfgclone.sh steps you can define what services you want to run on particular nodes<\/p>\n

At this stage your node1 & node2 should be similar & users should be able to login from node1 or node2 ( http:\/\/node1.domain:port<\/a> and http:\/\/node2.domain:port<\/a> resp.) with their own hostnames . If this is working then lets proceed with Load balancer configuration.<\/p>\n

Change your context file (xml file ) under $APPL_TOP\/admin <\/strong>via context editor or OAM (Oracle Application Manager )
\nBefore changing lets understand what variables you need to change & what each parameter mean<\/p>\n

webentryhost oa_var=”s_webentryhost”<\/strong> : Change this from node1 to loadbalancer name in our case its lbr
\nwebentrydomain oa_var=”s<\/strong>_webentrydomain” <\/strong>: Change it to load balancer domain name
\nwebentryurlprotocol oa_var=”s_webentryurlprotocol” <\/strong>: Change it to protocol you use to access application http<\/strong> or https<\/strong>
\nactivewebport oa_var=“s_active_webport” : <\/strong>Change it to port on which load balancer is listening . Lets assume your node1 & node2 webserver is listening on port 8000 and you want URL like http:\/\/lbr.domainname.com<\/a> that means your load balancer is listening on default http port i.e. 80 so define here s_active_webport as 80<\/p>\n

After changing these parameters on node1 , run autoconfig after changing above parameters in context file. Start your applications on Node1 only (shutdown services on node2 which is not yet configured for loadbalancer)<\/p>\n

Try to access applications via load balancer , if you can good job (You still have to configure second node).<\/p>\n

####<\/strong><\/p>\n

If you can’t nothing to worry (It happens) How to figure out problem & where to check for issues , wait for my updates till tomorrow ….<\/strong><\/p>\n

####<\/strong>
\nTip: Don’t forget to take backup before making all these changes \ud83d\ude09<\/p>\n

http:\/\/teachMeOracle.com\/forum<\/p>\n","protected":false},"excerpt":{"rendered":"

If you are accessing this page directly without reading previous post about load balancer & broad level steps of configuring 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