Load balancer "URL Map" does not support A/B testing via %traffic with sticky path selection.
I will have to install NGINX in front of the google load balancer, which is kinda redundant; however, it seems required as the current load balancer is unable to split traffic by either custom rules or by sticky path selection.
Specifically I'm looking for is a way to introduce a "trial" swap of only page "X" (defined by UrlMap) that would direct 10% of the traffic to a different server/ip/container cluster while recording this choice as a cookie for consistency. This would allow us to do some basic live testing and a/b testing without impacting all consumers.
This is an interesting suggestion – thanks. Passed along to the networking team.