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Techitect's avatar
Techitect
Icon for Nimbostratus rankNimbostratus
Jul 01, 2015

Pool Selection Based on URI and URL Modification

I'm trying to write an iRule that will redirect traffic to different pools based on URI, as well as altering the URL to remove the URI after the traffic is redirected to the correct pool. I think I have the initial pool redirect figured out, but I can't figure out how to do that AND THEN shorten the URL. Here are my examples:

This is what I ahve for the pool selection/redirection:

when HTTP_REQUEST {
switch -glob -- [string tolower [HTTP::path]] {
    "/url1*" {
        pool /Common/Pool1
        return
    }
    "/url2*" {
        pool /Common/Pool2
        return
    }
    "/url3*" {           
        pool /Common/Pool3
        return
    }
    "/url4*" {
        pool /Common/Pool4
        return
    }
    "/*" {
        pool /Common/Pool5
        return
    }

}

Thanks all!!

application delivery
devops
iRules
pool selection
redirection

4 Replies

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  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Jul 01, 2015

    try this:

    when HTTP_REQUEST {
switch -glob -- [string tolower [HTTP::path]] {
    "/url1*" {
        pool /Common/Pool1
        HTTP::uri [string map { "/url1" ""} $uri]
        return
    }
    "/url2*" {
        pool /Common/Pool2
        HTTP::uri [string map { "/url2" ""} $uri]
        return
    }
    "/url3*" {           
        pool /Common/Pool3
        HTTP::uri [string map { "/url3" ""} $uri]
        return
    }
    "/url4*" {
        pool /Common/Pool4
        HTTP::uri [string map { "/url4" ""} $uri]
        return
    }
    default {
        pool /Common/Pool5
        return
    }

}
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Jul 01, 2015

    same code without html conversion of quote:

     

    when HTTP_REQUEST {
switch -glob -- [string tolower [HTTP::path]] {
    "/url1*" {
        pool /Common/Pool1
        HTTP::uri [string map { "/url1" ""} $uri]
        return
    }
    "/url2*" {
        pool /Common/Pool2
        HTTP::uri [string map { "/url2" ""} $uri]
        return
    }
    "/url3*" {           
        pool /Common/Pool3
        HTTP::uri [string map { "/url3" ""} $uri]
        return
    }
    "/url4*" {
        pool /Common/Pool4
        HTTP::uri [string map { "/url4" ""} $uri]
        return
    }
    default {
        pool /Common/Pool5
        return
    }

}
  • Techitect's avatar
    Techitect
    Icon for Nimbostratus rankNimbostratus
    Jul 21, 2015

    Hi Stanilas,

     

    When I implemented your code additions, I received the following errors on traffic with the specific URI criteria:

     

    Jul 20 15:37:26 F5EXLB01 info tmm2[16571]: Rule /Common/URI_rule : HTTP path for 192.168.100.100 is /url4/XISOAPAdapter/MessageServlet

     

    Jul 20 15:37:26 F5EXLB01 err tmm2[16571]: 01220001:3: TCL error: /Common/URI_rule - can't read "uri": no such variable while executing "string map { "/url4" ""} $uri" ("/url4" arm line 3) invoked from within "switch -glob -- [string tolower [HTTP::path]] { "/url4" { pool /Common/Pool_URL4_443 HTTP::uri [string map { "/url4" ""} $uri..."

     

    Thanks!

     

  • mimlo_61970's avatar
    mimlo_61970
    Icon for Cumulonimbus rankCumulonimbus
    Jul 21, 2015

    It looks like $uri is not defined anywhere. I think the intent is to have it set to HTTP::uri, so you can substitute [HTTP::uri] where $uri is.