iRule for App Offline

There is a way to do it but you need to make sure you follow the config as follow The pool name have to be in lower case and equal to the domain name. This is because we are getting the Header from the request and change it to lower case In this Irule, I am adding the word pl_ but you can remove it Example Http or https://abc.123.com the pool name have to be abc.123.com

when HTTP_REQUEST {

set Vuri [ string tolower [HTTP::uri]] set Vheader [string tolower [HTTP::host]]

set Poolname "$Vheader"

set SiteName "XXXX.MAINTENANCEPAGE.org"

set Irulename "Irule_$SiteName" set SiteRedirect "https://$SiteName"

set Poolmember [active_members $Poolname ] set Poolmemberlist [ active_members -list $Poolname]

             if {$Poolmember < 1} then {
                    log local0.alert "ALERT-TEAM Pool $Poolname is down. This mean $SiteName website is down. IRULE=$Irulename";
                    HTTP::redirect "http://www.YOURPAGE-OFFLINE.COM"
                } 
             pool $Poolname

}