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myself_85560's avatar
myself_85560
Icon for Nimbostratus rankNimbostratus
Jun 01, 2016

LB decisions matching the headers

Hi, We have a custom written application that is being hosted on multiple servers behind the LTM. It does not use cookies rather a variety of unique http headers. I need to use these unique headers t...
application delivery
iRules
LTM
  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    Jun 02, 2016

    Hi,

    I would recommend the modified irule below, changed second if by elseif. Otherwise, If you match the first if you also match the else and you will have a tcl error and a tcp reset on thz client side :

    when HTTP_REQUEST {
if { [class match [HTTP::header "online.protocol.remote.contenttype"] equals header_value_1] } {
        pool_1
    }
elseif { [class match [HTTP::header "online.protocol.remote.contenttype"] equals header_value_2] } {
        pool_2
    } 
    else {
        pool_3
    }
   }
myself_85560's avatar
myself_85560
Icon for Nimbostratus rankNimbostratus

Hi,

 

Can we supply or pass the header values from a txt file, into the iRule. The txt file to contain all the header values, tab limited etc. using internal data-group? and be made available to the iRules?

 

Please advise how I can achieve it.

 

thanks

 

Yann_Desmarest's avatar
Yann_Desmarest
Icon for Cirrus rankCirrus
Jun 01, 2016
Hi, you can pass a datagroup file by using the following command 'class match [HTTP::header "online.protocol.remote.contenttype"] equals header_value'. header_value is the name of your datagroup.