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kazeem_yusuf1's avatar
kazeem_yusuf1
Icon for Nimbostratus rankNimbostratus
Feb 28, 2017

AN IRULE THAT ADDS A STRING AS AN HTTP RESPONSE TO ANY POOL MEMBER CHOSEN BY THE F5

I need to load balance an application running on two pool members, 172.30.114.56:8080, 172.30.114.58:8080; However, on the two, i only get the page, "Tomcat is running".

 

However,the service only loads when i type either, 172.30.114.56:8080/arsys, or 172.30.114.58/arsys.

 

I need an irule that can add a string to the http response, such that, after the load-balancing decision,the string /arsys is added so, the page can load.

 

I don't know if the Stream Profile can work for this.

 

I tried the below irule, but its not working.

 

NOTE: VIP is 172.30.114.60.

 

when HTTP_REQUEST { if { [HTTP::host] equals "172.30.114.60" and [HTTP::uri] starts_with "/" } { HTTP::redirect ";; } } The requirement is that the service is to be accessed over https,but i still want to test basic http vip for it,172.30.114.60, but its not loading currently to any of the servers,

 

application delivery
big-ip ltm
http
https
irule
iRules
LTM
security
tomcat
  • Kevin_Davies_40's avatar
    Kevin_Davies_40
    Icon for Nacreous rankNacreous
    Feb 28, 2017

    Given what you have said for the main VIP 172.30.114.60 try the following

    when LB_SELECTED {
  switch [LB::server addr] {
    "172.30.114.56" -
    "172.30.114.58" { if {[HTTP::uri] eq "/"} { HTTP::uri "/arsys" } }
  }
}
  • Nicholas_P__308's avatar
    Nicholas_P__308
    Icon for Cirrus rankCirrus
    Feb 28, 2017
    when HTTP_REQUEST {
 if { [HTTP::uri] starts_with "/" } {
 This is to rewrite the URI to the NEW Arsys URI  
  log -noname local0. "Rewrite for / [HTTP::host] [HTTP::uri]"
  HTTP::uri "/arsys"
 This is to select the arsys POOL listening on 8080
  log -noname local0. "This was processed for Arsys"
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Feb 28, 2017

    Hi,

    there is a problem with your condition... URI always starts with / 🙂

    when HTTP_REQUEST { 
    if { [HTTP::host] equals "172.30.114.60" and [HTTP::path] equals "/" } { 
        HTTP::redirect "/arsys" 
    } 
}

    this irule will work with both HTTP and HTTPS

  • kazeem_yusuf1's avatar
    kazeem_yusuf1
    Icon for Nimbostratus rankNimbostratus
    Mar 03, 2017

    Thanks so much everyone, The irule finally worked. I made a mistake of adding the routes on the standby unit instead of the active unit.

     

    The headache that a little diligence can save.