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Forum Discussion

boneyard's avatar
boneyard
Icon for MVP rankMVP
Mar 17, 2014

irule development - fixed variables within iRule context

looking for some input how others are handling such a situation.   with irule development you are often working with at least two irules in a certain environment (single bigip). of course multiple...
application delivery
design
devops
fixed
irule
iRules
variable
cdougall_14195's avatar
cdougall_14195
Icon for Cirrus rankCirrus
Mar 18, 2014

So here's the way that we use a shared iRule for whole subset of VIPs. This uses the Virtual name that the client connected to in order to identify a specific Data group with a matching (almost matching, a few mods) name.

set vsname [string trimright [join [lreplace [split [getfield [split [virtual name]] / [llength [split [virtual name] /] ] ] -] end end ""] -] -]
set dgnameTmp "[string trimright [string range [virtual name] 0 [string last - [virtual name]]] "-"]"
set dgname [append dgnameTmp "-DG"]
if {$static::log_debug}{
    log local0. "Data Group Tmp Name is: $dgnameTmp"  
    log local0. "Data Group Name is: $dgname"  
}

Long and short, if you Virtual was named "this-is-a-foo-house-80" your datagroup name would be "this-is-a-foo-house-DG". That way you can set any variables you want for that specific instance right there.