Load Balancing with Data Groups

Question

I have an iRule that looks at a data group and sends the application to the correct pool based on the string defined in the data group.  We are load balancing our applications between 1 - Windows 2003 pool and 1 - Windows 2012 pool so we can upgrade our application 1 and a time and move to the new server when ready.  However, I'm running into an issue when there are underscores in the application name.  I have to define my application in the datagroup with a backslash at the end which requires the user to type the backsplash in the URL.  How do I get around this?  Here is my iRule:
when HTTP_REQUEST {
   if { [class match [string tolower [HTTP::path]] contains dwdworkweb-acc.2003]} {
        pool dwdworkweb-acc.2003   }
   else {pool dwdworkweb-acc.2012  }
}&nbsp;
I have tried using equals instead of contains but then nothing works.  So for example, http://dwdworkweb-acc/applicationone works but http://dwdworkweb-acc/application_one does not, (strings in the datagroup are defined as /applicationone and /application_one)I have to type http://dwdworkweb-acc/application_one/ in order for it to work.  Any help would be greatly appreciated.&nbsp;

amit_karnik · Answer

Just a though, can you add the conditional "contains" OR "end_with". I am thinking the tcl contains operator might be checking if string1 is fully contained in string2.&nbsp;

debbie_123533 · Answer

That doesn't work, getting:
01070151:3: Rule [/Common/dwdworkweb-acc] error: /Common/dwdworkweb-acc:2: error: [wrong  args][class match [string tolower [HTTP::path]] contains or end_with dwdworkweb-acc.2003]&nbsp;

amit_karnik_269 · Answer

Actually I tested your orginal iRule and it works for me correctly even with the case translation and an "_" in the keyword. Could you add some log statements to check your HTTP::path as well as log statements before your pool assignments.

kunjan · Answer

How about the following iRule?
when HTTP_REQUEST {
    if { [class match "[string tolower [HTTP::path]]/" contains  dwdworkweb-acc.2003]} {
        pool dwdworkweb-acc.2003
    }
    else {
        pool dwdworkweb-acc.2012
    }
}

debbie_123533 · Answer

Thanks everyone but I figured it out, I had to add an entry in my data group to add the %5f to replace the underscore.  entries look like this now:&nbsp;
/test_debbie&nbsp;
/test%5fdebbie (added this one)&nbsp;
now it's working.&nbsp;

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Load Balancing with Data Groups

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