Spring Cloud Netflix FeignLoadBalancer can't set loadBalancerKey

I want to overwrite Ribbon IRule. public Server choose(ILoadBalancer lb, Object key) but I found 'key' is null. how can I solve?

i know issues/1272 solved。 but this is in the zuul RequestContext.getCurrentContext().set(LOAD_BALANCER_KEY, "any value you want"); my question is how to set loadBalancerKey in the FeignLoadBalancer？

Comment From: spencergibb

Closing in favor of https://github.com/spring-cloud/spring-cloud-openfeign/issues/359. Please don't cross-post.