Forum Discussion

Pierrejn's avatar
Pierrejn
Icon for Nimbostratus rankNimbostratus
Feb 06, 2017

iRule Help Please

I'm trying to combine L7 Load Balancing with sending a maintenance page if the pool/pools are down. Please see below.

 

Code when HTTP_REQUEST {
if { [class match [string tolower [HTTP::host]] equals _http_pools] } {
    pool [class match -value [string tolower [HTTP::host]] equals _http_pools]
}
}

and trying to combine the following

 

Code when HTTP_REQUEST {
set VSPool [LB::server pool]
if { [active_members $VSPool] < 1 } {
log local0. "Client [IP::client_addr] requested [HTTP::uri] no active nodes available..."
HTTP::respond 200 content "



We'll be back!



IMPORTANT MESSAGE 

Please be advised that we are performing a scheduled maintenance on the site you are trying to access.  All site access will be unavailable during this maintenance.  Service is expected to resume February 4 at 5 a.m. CT 

"
     }
    }
application delivery
iRules
  • Kai_Wilke's avatar
    Kai_Wilke
    Icon for MVP rankMVP
    Feb 06, 2017

    Hi Pierrejn,

    the iRule below is a combination of your two dedicated iRules...

    when HTTP_REQUEST { 
    set VSPool [class match -value [string tolower [HTTP::host]] equals _http_pools]
    if { $VSPool ne "" } then {
        if { [active_members $VSPool] > 0 } then {
            pool $VSPool
        } else {
            log local0. "Client [IP::client_addr] requested [HTTP::uri] no active nodes available..."
            HTTP::respond 200 content "

    
        
        We'll be back!
        
    
    
        
            IMPORTANT MESSAGE 
            
            Please be advised that we are performing a scheduled maintenance on the site you are trying to access.  All site access will be unavailable during this maintenance.  Service is expected to resume February 4 at 5 a.m. CT 
        
    
"

        }
    } else {
         Unknown HOST-Name requested...
    }
}

    Note: Updated the post to correct a formating glitch...

    Cheers, Kai