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bjorg235's avatar
bjorg235
Icon for Altocumulus rankAltocumulus
Aug 22, 2019
Solved

TMSH command to add irule

Hello Team   I need to add syslog irule to all the VIPs in f5. Already all VIps has more than 2-3 irules each. If I execute modify ltm virtual <> rules { syslog_rule } it is repalcing existing ru...
application delivery
iRules
LTM
  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Aug 22, 2019

    You don't need to write a shell script, you can use the 'edit' feature in tmsh.

    For example, if you wanted to add an iRule to all of your virtual servers you could do the following 

    tmsh edit ltm virtual all

    This bring up the vim editor, so you can use find and replace to add a new iRule to all your virtual servers with one line

    :%s/rules {/rules {\r\tnew-irule/g
Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
Aug 22, 2019

You don't need to write a shell script, you can use the 'edit' feature in tmsh.

For example, if you wanted to add an iRule to all of your virtual servers you could do the following 

tmsh edit ltm virtual all

This bring up the vim editor, so you can use find and replace to add a new iRule to all your virtual servers with one line

:%s/rules {/rules {\r\tnew-irule/g
  • bjorg235's avatar
    bjorg235
    Icon for Altocumulus rankAltocumulus
    Aug 22, 2019

    Thank you so much ..It worked..could you help to place the irule in the last. With the above I am getting irrule in the first

    • Lee_Sutcliffe's avatar
      Lee_Sutcliffe
      Icon for Nacreous rankNacreous
      Aug 22, 2019

      If I were you, I wouldn't rely on ordering your iRules on the virtual server.

      Instead, use iRule priority so they are executed in the order you require eg

      rule my-first-irule {
    when HTTP_REQUEST priority 10  {
        #this will run first
    }
}
      rule my-second-irule {
    when HTTP_REQUEST priority 20  {
        #this will run second
    }
}

      https://clouddocs.f5.com/api/irules/priority.html

  • Angryman808's avatar
    Angryman808
    Icon for Nimbostratus rankNimbostratus
    Oct 13, 2023

    This is genius, would you be able to write similar code to remove an iRule from all virtual servers as well?