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Jace_45978's avatar
Jace_45978
Icon for Nimbostratus rankNimbostratus
Jun 19, 2009

CSS to F5 iRule redirect to pool question.

have a CSS that we are moving away from and going to F5 v9.4.7

 

The CSS has two VIPs same IP and port one is a default url "*" goes to server A and the other is url "/battery/*" goes to service B

 

 

I am thinking that I create a standard port 80 VIP with default pool A and attach irule that sends /battery/ request to pool B

 

 

when HTTP_REQUEST {

 

if {[HTTP::uri] contains {/battery/}}

 

{pool B}

 

}

 

}

 

 

is there a better way to right this or will this even work?

 

Thanks in advance.

 

 

 

here is sample from CSS:

 

 

content blah-80

 

vip address 1.1.1.1

 

add service serverA

 

protocol tcp

 

port 80

 

url "/*"

 

active

 

content blah-battery-80

 

vip address 1.1.1.1

 

add service serverB

 

protocol tcp

 

port 80

 

url "/battery/*"

 

active
application delivery
dev
devops
iRules

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  • Jace_45978's avatar
    Jace_45978
    Icon for Nimbostratus rankNimbostratus
    Jun 19, 2009
    will give this a try. The string tolower.. is tolower just part of string rule? not familiar with that term.
  • James_Quinby_46's avatar
    James_Quinby_46
    Historic F5 Account
    Jun 19, 2009
    'string' is a TCL command, and there are bunch of interesting things you can do with it. There's a great rundown of some of them here:

     

     

    http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=338

     

     

    In the rule above, we just want to cover the possibility that someone will be looking for /BATTERY/ and get them to the right place.
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Jun 22, 2009
    "/battery/*" would match a path starting with /battery/, so you could use [HTTP::path] starts_with "/battery/" for the same functionality. If the web app is not case sensitive, you could set the path to lowercase before checking that it starts with /battery/ as jquinby suggested.

     

     

    If you're on 9.4.0 or higher, you could also use an HTTP class instead of an iRule to filter requests based on URI to a specific pool.

     

     

    Aaron
  • Jace_45978's avatar
    Jace_45978
    Icon for Nimbostratus rankNimbostratus
    Jun 22, 2009
    Thanks for all the info..

     

     

    I used the:

     

    when HTTP_REQUEST {

     

    if { [string tolower [HTTP::uri]] contains "battery"} {

     

    pool battery_pool

     

    }

     

    }

     

     

    which worked.

     

     

    9.4.7 is the code running on the BigIP

     

    I like the idea of HTTPClass profile for this instance, however I had tried HTTPClass profile on a previous conversion. It was using a header list and didn't work, dropped in iRule for the header and it worked. So.....not so sure about the HTTPClass, but I won't give up on it yet.

     

    Thanks for all your input. Glad this site exists and you all are very responsive!!