Simple iRule to route to particular pools based upton a specific header value.

[viziony]

I am hoping this is a simple ask (nobbie in iRule scripting) , I am trying to create an irule that will route to specific pools based up on cookie header value. 

For e.g. 

Cookie header "Toggle"

Value "Y" or "N"

If toggle = Y goto Pool A

If toggle = N goto Pool B

[Mohamed_Ahmed_Kansoh · Accepted solution]

Hi @viziony , 

Could you please try this : 

when HTTP_REQUEST {
if { [HTTP::header "Toggle"] equals "YES" }{
    pool pool_A
} else {
    pool pool_B
   }
}
#you can replace "equals" operator by "contains"

Try it and give me your feedback 
hope this helps you. 

[viziony]

Would it be something like this 

when HTTP_REQUEST {

if { [HTTP::header "Toggle"] is "YES"  }

{ pool pool_A }

else

{ pool Pool_B } }

[Mohamed_Ahmed_Kansoh · Accepted solution]

Hi @viziony , 

Could you please try this : 

when HTTP_REQUEST {
if { [HTTP::header "Toggle"] equals "YES" }{
    pool pool_A
} else {
    pool pool_B
   }
}
#you can replace "equals" operator by "contains"

Try it and give me your feedback 
hope this helps you. 

[F5_Design_Engineer]

Hi Viziony,

You can also try,

==================================================

when HTTP_REQUEST{
if { [string tolower [HTTP::header values "Toggle"]] contains "YES"} {
pool pool_A
} else {
pool pool_B
}
}

==================================================

Here are few links for further ready:

K27803480: iRule for selecting a Pool or Pool-member based on HTTP Request URI contents.
https://support.f5.com/csp/article/K27803480

See more articles here

DevCentral Technical Articles iRules 101 - #05 - Selecting Pools, Pool Members, ...
https://community.f5.com/t5/technical-articles/irules-101-05-selecting-pools-pool-members-and-nodes/...

Clouddocs > > HTTP::header
https://clouddocs.f5.com/api/irules/HTTP__header.html

iRules Recipe 3: Pool and SNAT Selection by Host Header Value
https://community.f5.com/t5/technical-articles/irules-recipe-3-pool-and-snat-selection-by-host-heade...

https://community.f5.com/t5/codeshare/select-pool-based-on-http-host-header/ta-p/278199

Cooking with iRules - HTTP
https://readthedocs.org/projects/f5-agility-lab-template/downloads/pdf/latest/

HTH

[Leslie_Hubertus · Accepted solution]

Hi @viziony  - it looks like you gave a kudo to @Mohamed_Ahmed_Kansoh 's reply, so I'm going to mark that as the Accepted Solution to make it easier for someone else to see the answer. If that answer didn't help you, please let me know so I can change that status. 🙂