Forum Discussion

stucky101_88485's avatar
stucky101_88485
Icon for Nimbostratus rankNimbostratus
Feb 24, 2013

Adding irules to vip that loop over DGL that are normally empty - ok practise ?

Gurus   I have been doing a lot of work recently utilizing data group lists since they are simply awesome and I'm always trying to separate code from data.   I use them as simple arrays for lis...
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iRules
nitass's avatar
nitass
Icon for Employee rankEmployee
Feb 24, 2013
this is my testing. i am running ve 10.2.4 hf4. 

 nothing in irule

root@ve10(Active)(tmos) list ltm rule myrule
ltm rule myrule {
    timing on
when HTTP_REQUEST {
}
}
root@ve10(Active)(tmos) show ltm rule myrule

Ltm::Rule Event: myrule:HTTP_REQUEST
------------------------------------
Priority                   500
Executions
  Total                  10.0K
  Failures                   0
  Aborts                     0
CPU Cycles on Executing
  Average                 3.3K
  Maximum                74.5K
  Minimum                 2.0K

 empty data group

root@ve10(Active)(tmos) list ltm data-group logged_persistence_cookies
ltm data-group logged_persistence_cookies {
    type string
}
root@ve10(Active)(tmos) list ltm rule myrule
ltm rule myrule {
    timing on
when HTTP_REQUEST {
  foreach elm [class names logged_persistence_cookies] {
    if { [HTTP::cookie exists $elm] } {
       do something
       log local0. [HTTP::cookie $elm]
    }
  }
}
}
root@ve10(Active)(tmos) show ltm rule myrule

Ltm::Rule Event: myrule:HTTP_REQUEST
------------------------------------
Priority                    500
Executions
  Total                   10.0K
  Failures                    0
  Aborts                      0
CPU Cycles on Executing
  Average                 13.3K
  Maximum                412.7K
  Minimum                  7.9K

 not-empty data group

root@ve10(Active)(tmos) list ltm data-group logged_persistence_cookies
ltm data-group logged_persistence_cookies {
    records {
        cookie1 { }
        cookie2 { }
        cookie3 { }
        tcookie { }
    }
    type string
}
root@ve10(Active)(tmos) list ltm rule myrule
ltm rule myrule {
    timing on
when HTTP_REQUEST {
  foreach elm [class names logged_persistence_cookies] {
    if { [HTTP::cookie exists $elm] } {
       do something
       log local0. [HTTP::cookie $elm]
    }
  }
}
}
root@ve10(Active)(tmos) show ltm rule myrule

Ltm::Rule Event: myrule:HTTP_REQUEST
------------------------------------
Priority                    500
Executions
  Total                   10.0K
  Failures                    0
  Aborts                      0
CPU Cycles on Executing
  Average                126.8K
  Maximum                564.1K
  Minimum                 66.2K