
Automatic merge from submit-queue Downward API implementation for resources limits and requests This is an implementation of Downward API for resources limits and requests, and it works with environment variables and volume plugin. This is based on proposal https://github.com/kubernetes/kubernetes/pull/24051. This implementation follows API with magic keys approach as discussed in the proposal. @kubernetes/rh-cluster-infra <!-- Reviewable:start --> --- This change is [<img src="http://reviewable.k8s.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](http://reviewable.k8s.io/reviews/kubernetes/kubernetes/24179) <!-- Reviewable:end -->