Forum Discussion
dkinsler_23191
Nimbostratus
Nimbostratusfallback to different VIP in Irule??
Hello All,
I have been looking for a way to do this but I have not been able to find it. I am trying to select a completely different VIP when all the pool members are down. I have found the code to do the fallback host, but I need the URL to not to change in the users browser. I want the LB to choose a different VIP, but not show it to the client. The VIP's will have different persistance requirements. Any ideas?
hoolioCirrostratus
If you want to select a second VIP to handle the request when a new request is parsed and the default pool is down, you can use something like:when HTTP_REQUEST { Check if currently selected pool has no active members if {[active_members [LB::server pool]] == 0}{ Use the fallback VIP virtual fallback_vip } }
Of for lower overhead, you could change from the HTTP_REQUEST to the CLIENT_ACCEPTED event. Then the check would only be done when a client establishes a new TCP connection to the VIP versus on each HTTP request.
Aaron
L4L7_53191Another, ultra lean and mean, option is to point your http profile to this virtual as a fallback host, which will have the same affect in many cases.
-Matt- hoolioThe issue with using the fallback host option is it results in a 302 redirect with the new URL being sent to the client. The client will see this change. dkinsler wanted a method that would be transparent to the client.
Aaron