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Jeremy_Brainerd's avatar
Jeremy_Brainerd
Icon for Nimbostratus rankNimbostratus
Mar 22, 2017

Using iRule to redirect F5 traffic based on Maintenance.

I would like to know how to redirect F5 traffic using a iRule when the main URL site displays an specific keyword on the main web page (example: "Maintenance"). Keep in mind that the pool members will still be passing health checks during this time. I would also like to incorporate into this same iRule a redirect when all pool members are down.

 

application delivery
BIG-IP
devops
iRules

6 Replies

  • Samir_Jha_52506's avatar
    Samir_Jha_52506
    Icon for Noctilucent rankNoctilucent
    Mar 22, 2017

    Tried to write iRule based on the question. Let us know if any question.

     when HTTP_REQUEST {
    if { [active_members [LB::server pool]] == 0 } {
         HTTP::redirect "http://www.google.com"  }
        }

    when HTTP_REQUEST_DATA {
     Define a string-type datagroup called dg_blocked containing words to be "Maintenance"
     if { [matchclass [HTTP::payload] contains dg_blocked] }{
        HTTP::respond 302 Location "https://www.google.com" }
      }

    For general payload examination, payload collection is limited by memory allocation constraints to a 32MB maximum.

    • Jeremy_Brainerd's avatar
      Jeremy_Brainerd
      Icon for Nimbostratus rankNimbostratus
      Mar 23, 2017

      Thanks for the response back jhaas now I have another question. Is there a way in the iRule/datagroup to look look for this keyword "Maintenance" at a specific URL that is different than what the F5 VS is pointing to?

       

    • Jeremy_Brainerd's avatar
      Jeremy_Brainerd
      Icon for Nimbostratus rankNimbostratus
      Mar 23, 2017

      jhaas so I wouldn't be able to do the following?

       

      Current F5 Pool routes to abc.com:1009

       

      I would like to check location 123.com for keyword "Maintenance" and once this site contains this keyword I would like to redirect F5 traffic to xzy.com:1009/Maintenance.htm?

       

      If I understand this correctly the keyword "Maintenance" would need to reside on site abc.com:1009 in order to perform the redirect....is this a correct assumption?