Forum Discussion

Habib_Ulla_Khan's avatar
Habib_Ulla_Khan
Icon for Nimbostratus rankNimbostratus
Jul 20, 2017

Irule for maintenance page-- common VIP for multiple applications

Hi ,

 

I have a VIP with multiple application (DNS) pointed to one single VIP. The pool selection made based on hostname as in irule below.

 

 

I want to add rule to get maintenance page if a specific pool goes down. Kindly help what all options can be choose or share irule which can be used.

 

application delivery
iRules
  • Samir_Jha_52506's avatar
    Samir_Jha_52506
    Icon for Noctilucent rankNoctilucent
    Jul 20, 2017

    We will create if event inside switch. Please try & update if any issue.

        when HTTP_REQUEST { 
        switch [string tolower [HTTP::host]] {
        "abc.bbc.com" {
            if { [active_members pool_1] < 1 } {
                HTTP::redirect "https://www.maintenance.com[HTTP::uri]" }
                elseif { pool pool_1 }
    }
        "xyz.bbc.com" {
            if { [active_members pool_2] < 1 } {
                HTTP::redirect "https://www.maintenance.com[HTTP::uri]" }
                elseif { pool pool_2 }
        }
  }
}
    • Habib_Ulla_Khan's avatar
      Habib_Ulla_Khan
      Icon for Nimbostratus rankNimbostratus
      Jul 20, 2017

      Hi F5_rock,

      I used below irule. maintance page works fine but with below error. The page doesnt load proper may be because the uri trying is in CAPS and LB is not changing to lower it.

      when HTTP_REQUEST { 
 switch [string tolower [HTTP::host]] {
"services.com" {
SSL::disable serverside
if { [active_members pool-http] eq 0 } {
HTTP::path "/maintenance/ServerMaintenance.htm"
pool maintenance-pool  
} {
HTTP::path "/xyz"
pool services-pool-http
}
}

      Tried this but no help

  • Jad_Tabbara__J1's avatar
    Jad_Tabbara__J1
    Icon for Cirrostratus rankCirrostratus
    Jul 20, 2017

    Hello Habib,

    Replace the line 

    HTTP::path "/maintenance/ServerMaintenance.htm"

    by 

    HTTP::uri "/maintenance/ServerMaintenance.htm"

    Not sure this will resolve your issue but just to correct it

    Regards