Forum Discussion

P_Kueppers_3614's avatar
P_Kueppers_3614
Icon for Nimbostratus rankNimbostratus
Oct 22, 2018

Bug in VS redirect with HTML iRule?

Hi,   we use the iRule for serving "Error 503 Service Unavailable" HTML page. In all virtual servers we got this iRule which is triggered if the pool is down. This works quite well in all browsers...
application delivery
BIG-IP
iRules
Andy_McGrath's avatar
Andy_McGrath
Icon for Cumulonimbus rankCumulonimbus
Oct 24, 2018

I think this is because you have a new line as the first line of the 

HTTP::respond
content which is then seen just as text by Safari and Chrome. I have tried to replicate it using Chrome but not able to

Try the following and let us know if it is any better:

when HTTP_REQUEST {
    if { [active_members [LB::server pool]] < 1 } {
    log local0. "Client [IP::client_addr] requested Host: [HTTP::host] with URI: [HTTP::uri] accessed [virtual] but no active nodes available..."

        switch [HTTP::uri] {
            "/Logo.png" {
                                HTTP::respond 200 content [ifile get "Logo.png"] "Content-Type" "image/png" "Cache-Control" "no-cache, must-revalidate"
                                }
        default { 
                    HTTP::respond 503 content {



Error 503 Service Unavailable


 Service Unavailable 
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

}
      }
    }
  }
}