Redirect when all poolmembers are down

Hello,

 

 

You can do this without a rule using the fallback host on the HTTP profile associated with the virtual server. Check the LTM config guide's section on the HTTP profile for details.

 

 

Else, if you want to use an iRule, you can do so following the example in SOL7065 (Click here).

 

 

Aaron

Here's one that I use:

when HTTP_REQUEST {
 set mypool [active_members somepool]
 switch $mypool {
  "0" {
   HTTP::redirect "http://www.mydomain.com/maintenance.html" 
  }
  default {
   pool mybackup_pool 
  }
 }
}

Aaron, wschultz,

 

Thanks a lot. This was indeed what I was looking for.

 

Cheers.

 

Ed

This also works to if you have no suitable external site to redirect to. I simply have the BIGIP do a content subsitution with the HTML contained in the pool_error string.

 

 

when HTTP_REQUEST {

 

}when RULE_INIT {

 

set pool_error {

 

 

 

 

 

No Servers Available are in the Requested Virtual Server's Pool

 

 

 

 

 

 

 

INSERT YOUR HTML HERE!!!

 

 

 

 

 

}

 

}

 

when HTTP_REQUEST {

 

if {[active_members your_pool_here ] < 1 } {

 

HTTP::respond 200 content [subst $::pool_error]

 

}

 

}

 

That's a good point. The HTTP::respond command is extremely powerful in that it allows you to send back custom HTML content directly from the BIG-IP. It also saves you from having to send the client a redirect, which some clients will complain about, depending on their security settings.

 

 

Colin