Forum Discussion

Nimbostratus

Jun 05, 2015

how to setup persistence to concatenate jvmRoute with JSESSIONID to generate final SESSIONID

Hi, Can anyone help with how to setup persistence for a request as below: We are going to be setting a "jvmRoute" variable in tomcat, and need to configure the F5 load balancer to concatenate it...

riyer_206339

Nimbostratus

Mar 10, 2017

Hi All,

We have similar requirement i.e. to persist at BIG-IP level in this pattern "JSESSIONID.jvmRoute". I would like to know if this iRule below would help us in achieving that goal.

when HTTP_RESPONSE {
  if { [HTTP::cookie exists "JSESSIONID"] } {
   persist add uie [HTTP::cookie "JSESSIONID"][HTTP::cookie "jvmRoute"]
  }
}

when HTTP_REQUEST {
  if { [HTTP::cookie exists "JSESSIONID"] } {
    persist uie [HTTP::cookie "JSESSIONID"][HTTP::cookie "jvmRoute"]
  }
}

Regards, Ram

sirwinston
Nimbostratus
Mar 10, 2017
Hi Ram,

As I indicated Tomcat appends the jvmRoute to the JSESSIONID. Tomcat does not set a separate jvmRoute cookie so [HTTP::cookie "jvmRoute"] will always return an empty string.

Bottom line is that the standard JSESSIONID irule should work fine.

Rgds,

W.
riyer_206339
Nimbostratus
Mar 10, 2017
Thanks for quick response, Winston!

I'll implement the above iRule without [HTTP::cookie "jvmRoute"] and post the results. Out tomcat instance already has jvmRoute configured in server.xml file.

Regards, Ram