// e.g. If TopologyKey is "kubernetes.io/hostname", each Node is a domain of that topology.
  // And, if TopologyKey is "topology.kubernetes.io/zone", each zone is a domain of that topology.
  // It's a required field.
  optional string topologyKey = 2;

  // WhenUnsatisfiable indicates how to deal with a pod if it doesn't satisfy
  // the spread constraint.
  // - DoNotSchedule (default) tells the scheduler not to schedule it.

- Added validation to ensure that if `service.kubernetes.io/topology-aware-hints` and `service.kubernetes.io/topology-mode` annotations are both set, they are set to the same value.Also Added deprecation warning if `service.kubernetes.io/topology-aware-hints` annotation is used. ([#116612](https://github.com/kubernetes/kubernetes/pull/116612), [@robscott](https://github.com/robscott))

 - Newly provisioned PVs by gce-pd will no longer have the beta FailureDomain label. gce-pd volume plugin will start to have GA topology label instead. ([#98700](https://github.com/kubernetes/kubernetes/pull/98700),...

    * regions ("failure-domain.beta.kubernetes.io/region") in favor of their GA equivalents:
    * "topology.kubernetes.io/zone" and "topology.kubernetes.io/region".
    * The beta labels "failure-domain.beta.kubernetes.io/zone" and "failure-domain.beta.kubernetes.io/region" will be removed in v1.21

- Topology Aware Hints now ignores unready endpoints when assigning hints. ([#106510](https://github.com/kubernetes/kubernetes/pull/106510), [@robscott](https://github.com/robscott))

- The calculations for Pod topology spread skew now exclude nodes that
  don't match the node affinity/selector. This may lead to unschedulable pods if you previously had pods
  matching the spreading selector on those excluded nodes (not matching the node affinity/selector),
  especially when the `topologyKey` is not node-level. Revisit the node affinity and/or pod selector in the

## What’s New (Major Themes)

### Kubernetes Topology Manager Moves to Beta - Align Up!

- Reminder: The labels "failure-domain.beta.kubernetes.io/zone" and "failure-domain.beta.kubernetes.io/region" are deprecated in favor of "topology.kubernetes.io/zone" and "topology.kubernetes.io/region" respectively.  All users of the "failure-domain.beta..." labels should switch to the "topology..." equivalents. ([#96033](https://github.com/kubernetes/kubernetes/pull/96033), [@thockin](https://github.com/thockin)) [SIG API Machinery, Apps, CLI, Cloud Provider, Network,...

 - Newly provisioned PVs by Azure disk will no longer have the beta `FailureDomain` label. Azure disk volume plugin will start to have GA topology label instead. ([#101534](https://github.com/kubernetes/kubernetes/pull/101534), [@kassarl](https://github.com/kassarl))

## New Features