- The Pod API field `.spec.schedulingGates[*].name` now requires qualified names (like `example.com/mygate`), matching validation for names of `.spec.readinessGates[*].name`. Any uses of the alpha scheduling gate feature prior to 1.27 that do not match that validation must be renamed or deleted before upgrading to 1.27. ([#115821](https://github.com/kubernetes/kubernetes/pull/115821), [@lianghao208](http...

* The `spec.readinessGates` field is now dropped during creation of `Pod` objects unless the `PodReadinessGates` feature gate is enabled. ([#72695](https://github.com/kubernetes/kubernetes/pull/72695), [@rajathagasthya](https://github.com/rajathagasthya))

  // all conditions specified in the readiness gates have status equal to "True"
  // More info: https://git.k8s.io/enhancements/keps/sig-network/580-pod-readiness-gates
  // +optional
  repeated PodReadinessGate readinessGates = 28;

  // RuntimeClassName refers to a RuntimeClass object in the node.k8s.io group, which should be used
  // to run this pod.  If no RuntimeClass resource matches the named class, the pod will not be run.