when will kubernetes service supoort set-based selector?
Services belong to the v1 API group (which is stable). By that time, the set-based selector was not implemented. In order to allow that kind of selector, they would need to create a new type of Service that would belong to the alpha/beta API group. In this sense, this would likely take time in order to be production ready. I did not find any information about plans on working on that. I would not expect it in the short term for this to be available.