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Mario_Franco's avatar
Icon for Altocumulus rankAltocumulus
Jun 06, 2022

Set a variable from a Data group

Hi everyone,

I have an irule with a static variable "set example 1" which is used when we need to point to a specific virtual server, and we change it to "Set example 0" when we want to move the traffic to another virtual server, the thing is now we have many irules and when we want to move the traffic we need go one by one and change the variable, I am thinking of setting the variable with a data group where we just need to go there and change the value in the datagroup "1" or "0", is it possible? or there are any other option?

1 Reply

  • You probably have figured it out by now but just in case, here's an example.

    Data group list:

    ltm data-group internal /Common/select_server {
        records {
    	server {
                data a
        type string

    And the rule: 

    when HTTP_REQUEST {
      # Below is the droid... I mean line you're looking for
      set selected_server [class lookup "server" select_server]
      HTTP::respond 200 content $selected_server

     Good luck!

    Kind regards,