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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
Jun 02, 2016

Hi Yann,

See below. I came out with an iRule. Would this be OK. Please respond. Much appriciated.

These are string data-groups; header_value_1 & header_value_2 

when HTTP_REQUEST {
if { [class match [HTTP::header "online.protocol.remote.contenttype"] equals header_value_1] } {
        pool_1
    }
if { [class match [HTTP::header "online.protocol.remote.contenttype"] equals header_value_2] } {
        pool_2
    } 
    else {
        pool_3
    }
   }