Forum Discussion

Jagadeesh's avatar
Jagadeesh
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Sep 27, 2023

what is the Pool limit to do URI redirection using irule

I have a VCMP guest LTM virtual box with 1 Core running on BIG-IP 15.1.9.1 Build 0.0.5 Point Release 1 I have a requirement , With Single VIP listening on Port 443 and selecting the pool using iRule...
application delivery
Jagadeesh's avatar
Jagadeesh
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Hi Daniel ,

Thanks for the reply , Yes it is VCMP Guest with one core. With single VIP with Port 443 and Cert.

Irule to change the pool based on the URI. The pool members in the pool could be different and the pool members would also listen on a unique port.We will have more than 200 Pools in such a way.

Will it cause any Performance issue ? Please share if any solutions for this requirement.

Thanks..!

Paulius's avatar
Paulius
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Sep 27, 2023

Jagadeesh This depends on multiple factors but at face value it shouldn't be an issue. If it's one URI per pool you might consider using a data-group to match in an iRule rather than a long iRule with 200+ entries. Make sure to keep what Daniel_Wolf has stated into consideration.

  • Jagadeesh's avatar
    Jagadeesh
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    Sep 27, 2023

    Thanks Paul , Yes it one URI per pool.May i know if there is any KB article that i can refer.

    • Paulius's avatar
      Paulius
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      Sep 27, 2023

      Jagadeesh I don't know of a KB article off the top of my head but I'm sure one exists. The following is what I put together assuming you have a default pool to handle all traffic that isn't defined in the data-group.

       

      when CLIENT_ACCEPTED priority 500 {

    set DEFAULT_POOL [LB::server pool]

}

when HTTP_REQUEST priority 500 {

    set URI [string tolower [HTTP::uri]]

    if { [class match -- ${URI} eq CLASS-URI-TO-POOL] } {

        set TEMP_POOL [class match -- -value $URI eq CLASS-URI-TO-POOL]

        pool ${TEMP_URI}

    } else {
        $DEFAULT_POOL
    }

}

      In your data-group called CLASS-URI-TO-POOL the string field would have the path and the value field will be the pool name that matches it.