// The CSI external-attacher coordinates with CSI volume driver and updates
  // the volumeattachment status when the attach operation is complete.
  // If the CSIDriverRegistry feature gate is enabled and the value is
  // specified to false, the attach operation will be skipped.
  // Otherwise the attach operation will be called.
  //
  // This field is immutable.
  //
  // +optional

  // policy allows the lifecycle to be altered, for example by deleting persistent
  // volume claims when their stateful set is deleted, or when their pod is scaled
  // down. This requires the StatefulSetAutoDeletePVC feature gate to be enabled,
  // which is alpha.  +optional
  optional StatefulSetPersistentVolumeClaimRetentionPolicy persistentVolumeClaimRetentionPolicy = 10;

  // so resource intensive daemonsets should take into account that they may
  // cause evictions during disruption.
  // This is an alpha field and requires enabling DaemonSetUpdateSurge feature gate.
  // +optional
  optional k8s.io.apimachinery.pkg.util.intstr.IntOrString maxSurge = 2;
}

// Spec to control the desired behavior of rolling update.
message RollingUpdateDeployment {

  // This is an alpha feature and may change or be removed in the future.
  // The field is populated by the apiserver only if the
  // StorageVersionHash feature gate is enabled.
  // This field will remain optional even if it graduates.
  // +optional
  optional string storageVersionHash = 10;
}

// APIResourceList is a list of APIResource, it is used to expose the name of the

  // if they encounter an unrecognized policy in this field.
  //
  // This field is beta-level. The eviction API uses this field when
  // the feature gate PDBUnhealthyPodEvictionPolicy is enabled (enabled by default).
  // +optional
  optional string unhealthyPodEvictionPolicy = 4;
}

// PodDisruptionBudgetStatus represents information about the status of a

  // minReplicas is the lower limit for the number of replicas to which the autoscaler
  // can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the
  // alpha feature gate HPAScaleToZero is enabled and at least one Object or External
  // metric is configured.  Scaling is active as long as at least one metric value is
  // available.
  // +optional
  optional int32 minReplicas = 2;

  // minReplicas is the lower limit for the number of replicas to which the autoscaler
  // can scale down.  It defaults to 1 pod.  minReplicas is allowed to be 0 if the
  // alpha feature gate HPAScaleToZero is enabled and at least one Object or External
  // metric is configured.  Scaling is active as long as at least one metric value is
  // available.
  // +optional
  optional int32 minReplicas = 2;

  optional int32 minReadySeconds = 9;

  // PersistentVolumeClaimRetentionPolicy describes the policy used for PVCs created from
  // the StatefulSet VolumeClaimTemplates. This requires the
  // StatefulSetAutoDeletePVC feature gate to be enabled, which is alpha.
  // +optional
  optional StatefulSetPersistentVolumeClaimRetentionPolicy persistentVolumeClaimRetentionPolicy = 10;

  // ordinals controls the numbering of replica indices in a StatefulSet. The