iRule to redirect based on availability

if URI contains /C then goto pool3 , but if pool3 members are all offline, then HTTP redirect to

you can use active_members command to check number of pool3 active members before sending traffic to. if all is down, you can send http redirection using either HTTP::redirect or HTTP::respond command.

active_members

Hi, I agree with @nitass comments. You need to verify 1st Pool_C status. I guess, it require two iRule to check the connection. Status of Pool C. If it is up then it traffic will go to 2nd iRule.

Rule 1(make 1st iRule)

when HTTP_REQUEST {
     if { [active_members pool_c] < 1 } {
        HTTP::redirect http://failoverurl
         return
             }
         }

Rule 2. Redirect traffic based on the condition.

     when HTTP_REQUEST {
            set uri [string tolower [HTTP::path]]
            switch -glob $uri {
            "/A/" { pool A }
            "/B/" { pool B }
            "/C/" { pool C }
                     }
                }

Hope it will work..

Thanks for the replies.

I don't want to affect the other pools though. In your example, wont your 1st iRule take precedence, in which case if pool3 is offline then it will redirect all requests and not invoke the second iRule?

I'm looking to only redirect if the request contains /C, other requests should always go to the other pools.

thanks J

I'm looking to only redirect if the request contains /C, other requests should always go to the other pools.

e.g.

when RULE_INIT {
   pool names
  set static::poola "a"
  set static::poolb "b"
  set static::poolc "c"
  set static::pooldefault "default"
}
when HTTP_REQUEST {
  switch -glob [string tolower [HTTP::uri]] {
    "/a/*" { 
      pool $static::poola
    }
    "/b/*" { 
      pool $static::poolb
    }
    "/c/*" { 
      if { [active_members $static:poolc] > 0 } {
        pool $static::poolc
      } else {
        pool $static::pooldefault
      }
    }
    default { 
       do something
    }
  }
}

Awesome. Thank you!!