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steve_cross_650's avatar
steve_cross_650
Icon for Nimbostratus rankNimbostratus
Nov 14, 2006

NEWBIE: iRule for choosing pool based on URL

I am trying to point my subdomain towards a different pool of servers then my main site. For example:

www.mywebsite.com -> goes to pool a

beta.mywebsite.com -> goes to pool b

This is what i tried to use:


when HTTP_REQUEST { 
   if { [string tolower [HTTP::host]] equals "beta.mywebsite.com"}
   {
     pool pool_A
   }
   else
   {
     pool pool_B
   }
}

However nothing was ever routed to pool_A when i went to that URL. I even tried using a hard-coded URL so I would know when the iRule is going into effect:


when HTTP_REQUEST { 
   if { [string tolower [HTTP::host]] equals "beta.mywebsite.com"}
   {
   HTTP::redirect "http://www.google.com"
   }
   else
   {
     pool pool_B
   }
}

How can I figure out why my IF statement is failing? Would I be better using HTTP::host]] starts_with "beta."?

Again, I am a total newbie so maybe there is another setting that I don't have turned on which will make this iRule go "live". Any help would be GREATLY appreciated.
application delivery
dev
devops
iRules

2 Replies

  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Nov 15, 2006
    The rule looks fine. Just make sure that you have it associated with the VIP under the VIP's resources tab.

    You can add a log statement to determine the exact host and URI the client is requesting:

    
when HTTP_REQUEST {
   log local0. "client: [IP::remote_addr] -> [HTTP::host][HTTP::uri]"
   if { [string tolower [HTTP::host]] equals "beta.mywebsite.com"}{
      pool pool_A
   }
   else {
      pool pool_B
   }
}

    Aaron
  • steve_cross_650's avatar
    steve_cross_650
    Icon for Nimbostratus rankNimbostratus
    Nov 15, 2006
    Aaron,

     

     

    Thank you so much for your quick reply. You were correct! I had not yet associated my rule w/ a VIP. For other newbies out there who may have the same question I went to:

     

     

    Virtual Servers

     

    -> Clicked "edit" under the Resources column for my only HTTP VIP

     

    -> Clicked "manage" in the iRules section

     

    -> Moved my iRule from "available" to "enabled"

     

    -> Clicked "Finished"