// to be.
  // +optional
  optional RollingUpdateDeployment rollingUpdate = 2;
}

// ReplicaSet ensures that a specified number of pod replicas are running at any given time.
message ReplicaSet {
  // If the Labels of a ReplicaSet are empty, they are defaulted to
  // be the same as the Pod(s) that the ReplicaSet manages.
  // Standard object's metadata.

}

// DEPRECATED - This group version of ReplicaSet is deprecated by apps/v1/ReplicaSet. See the release notes for
// more information.
// ReplicaSet ensures that a specified number of pod replicas are running at any given time.
message ReplicaSet {
  // If the Labels of a ReplicaSet are empty, they are defaulted to
  // be the same as the Pod(s) that the ReplicaSet manages.

}

// DEPRECATED - This group version of ReplicaSet is deprecated by apps/v1beta2/ReplicaSet. See the release notes for
// more information.
// ReplicaSet ensures that a specified number of pod replicas are running at any given time.
message ReplicaSet {
  // If the Labels of a ReplicaSet are empty, they are defaulted to
  // be the same as the Pod(s) that the ReplicaSet manages.

  optional string reason = 7;

  // regarding contains the object this Event is about. In most cases it's an Object reporting controller
  // implements, e.g. ReplicaSetController implements ReplicaSets and this event is emitted because
  // it acts on some changes in a ReplicaSet object.
  // +optional
  optional k8s.io.api.core.v1.ObjectReference regarding = 8;

  // This can not be 0 if MaxSurge is 0.
  // Defaults to 25%.
  // Example: when this is set to 30%, the old ReplicaSet can be scaled down to 70% of desired pods
  // immediately when the rolling update starts. Once new pods are ready, old ReplicaSet
  // can be scaled down further, followed by scaling up the new ReplicaSet, ensuring
  // that the total number of pods available at all times during the update is at
  // least 70% of desired pods.

  optional string reason = 7;

  // regarding contains the object this Event is about. In most cases it's an Object reporting controller
  // implements, e.g. ReplicaSetController implements ReplicaSets and this event is emitted because
  // it acts on some changes in a ReplicaSet object.
  // +optional
  optional k8s.io.api.core.v1.ObjectReference regarding = 8;

periodSeconds, successThreshold, failureThreshold
  * The new ReplicaSet API (Beta) in the Extensions API group is similar to
ReplicationController, but its [selector](http://kubernetes.io/docs/user-guide/labels/#label-selectors) is more general (supports set-based selector; whereas ReplicationController
only supports equality-based selector).
  * Scale subresource support is now expanded to ReplicaSets along with

## Notable Changes to Existing Behavior

### Deployments

- ReplicaSets of paused Deployments are now scaled while the Deployment is paused. This is retroactive to existing Deployments.
- When scaling a Deployment during a rollout, the ReplicaSets of all Deployments are now scaled proportionally based on the number of replicas they each have instead of only scaling the newest ReplicaSet.

### kubectl rolling-update: < v1.4.0 client vs >=v1.4.0 cluster

Anyway, the cluster should get back to the proper size after 10 min.

### Deployment

* federation: Adding support for DeleteOptions.OrphanDependents for federated replicasets and deployments. Setting it to false while deleting a federated replicaset or deployment also deletes the corresponding resource from all registered clusters. ([#36476](https://github.com/kubernetes/kubernetes/pull/36476), [@nikhiljindal](https://github.com/nikhiljindal))