Forum Discussion

Mohanad's avatar
Mohanad
Icon for Cirrostratus rankCirrostratus
Sep 14, 2021

Session Persistence based on http header value using iRule

Hello

Kindly i need to apply Session Persistence based on http header :

Payment application working as follow:

  1. At first request (Login) the server response with http header named "X-Token" with "fb9c2bb6-80f6-16c3-afcd-84e98976a4b7"
  2. The rest of http requests will have header name "X-Auth-Token" with the same value "fb9c2bb6-80f6-16c3-afcd-84e98976a4b7" assigned by the server

I want to make sure that the client land on the same server that sent the "X-Token"

I searched for iRule that match the http header, the following iRule will work or need to modify it?

when HTTP_REQUEST {
    if { [HTTP::header exists "X-Auth-Token"]} {
        persist uie [HTTP::header "X-Auth-Token"]
    }
}

Q

application delivery
iRules
TMOS
  • xuwen's avatar
    xuwen
    Sep 16, 2021

    when HTTP_RESPONSE {

    if { [HTTP::header exists "X-Token"] } {

    if { [HTTP::header "X-Token"] != "" } {

    persist add uie [HTTP::header "X-Token"]

    }

    }

    }

    when HTTP_REQUEST {

    if { [HTTP::header exists "X-Auth-Token"] } {

    set value [persist lookup uie [HTTP::header "X-Auth-Token"]]

    log local0. "value is $value"

    if { $value != "" } {

    persist uie [HTTP::header "X-Auth-Token"]

    }

    }

    }

  • oguzy's avatar
    oguzy
    Icon for Cirrostratus rankCirrostratus
    Sep 14, 2021

    Hi Mohanad,

     

    Your irule seems correct. Maybe you can add a fallback persistence in an else condition.

     

    According to the article (Overview of universal persistence (f5.com), in addition to your irule, you should also create a universal persistence profile as follows:

    To create a universal persistence profile and reference the persistence iRule you created in the previous procedure, perform the following procedure:

    1. Log in to the Configuration utility.
    2. Navigate to Local Traffic > Profiles.
    3. From the Persistence menu, click Create.
    4. Type a name for the universal persistence profile.
    5. For Persistence, click Universal.
    6. For Configuration, select the iRule check box, then click the persistence iRule you created.
    7. Click Finished.

     

     

    • Mohanad's avatar
      Mohanad
      Icon for Cirrostratus rankCirrostratus
      Sep 15, 2021

      Thank you Oguzy, i know this requires persistence profile

  • xuwen's avatar
    xuwen
    Icon for Cumulonimbus rankCumulonimbus
    Sep 16, 2021

    when HTTP_RESPONSE {

    if { [HTTP::header exists "X-Token"] } {

    if { [HTTP::header "X-Token"] != "" } {

    persist add uie [HTTP::header "X-Token"]

    }

    }

    }

    when HTTP_REQUEST {

    if { [HTTP::header exists "X-Auth-Token"] } {

    set value [persist lookup uie [HTTP::header "X-Auth-Token"]]

    log local0. "value is $value"

    if { $value != "" } {

    persist uie [HTTP::header "X-Auth-Token"]

    }

    }

    }

    • Mohanad's avatar
      Mohanad
      Icon for Cirrostratus rankCirrostratus
      Sep 16, 2021

      Thank you so much xuwen, i will test it out and feedback