How to do http redirect

Do you really want to send the client a redirect? This will update the address bar in the browser and potentially prevent LTM from load balancing the requests if acme1.com and acme2.com don't resolve to a VIP address.

If so, here is a rough example of this ratio load balancing. I'm sure there are other ways to do it, but this is one method.

Aaron

 
 when RULE_INIT { 
  
     Log debug messages (to /var/log/ltm)?  0 = no, 1 = yes. 
    set ::site_router_debug 0 
  
     Percentage of new requests to send to new site (valid values: integers from 0 - 10; with 1 being 10%, 5 being 50%, 10 being 100%) 
    set ::site1_ratio {5} 
  
     Initialise a counter for ratio load balancing between the legacy and new site. 
     (this value shouldn't be changed) 
    set ::counter 0 
 } 
 when HTTP_REQUEST { 
  
       Send first X out of 10 requests to the new site.  Then send next 10 minus X requests to the legacy site. 
    if {$::counter < $::site1_ratio}{ 
  
       if {$::site_router_debug}{log local0. "Counter < max: $::counter < $::site1_ratio.  Selected site1."} 
  
        Redirect to a URL. Set headers to prevent caching of response. 
       HTTP::respond 302 \ 
          "Location" "https://site1" \ 
          "Connection" "Close" \ 
          "Cache-Control" "no-cache" \ 
          "Pragma" "no-cache" 
  
    } else { 
  
       if {$::site_router_debug}{log local0. "Counter > max: $::counter > $::site1_ratio.  Selected site2."} 
   
        Redirect to a URL. Set headers to prevent caching of response. 
       HTTP::respond 302 \ 
          "Location" "https://site2" \ 
          "Connection" "Close" \ 
          "Cache-Control" "no-cache" \ 
          "Pragma" "no-cache" 
    } 
  
     Increment the counter for ratio load balancing 
    incr ::counter 
  
     If counter is over the max, reset it to 0 
    if {$::counter > 10}{ 
       set ::counter 0 
       if {$::site_router_debug}{log local0. "Counter: $::counter, resetting to 0"} 
    } 
 }