// This is a pointer to distinguish between explicit zero and not specified.
  // This is set to the max value of int32 (i.e. 2147483647) by default, which
  // means "retaining all old ReplicaSets".
  // +optional
  optional int32 revisionHistoryLimit = 6;

  // Indicates that the deployment is paused and will not be processed by the
  // deployment controller.
  // +optional

- Kubeadm: do not allow empty `--config` paths to be passed...