// spec contains the certificate request, and is immutable after creation.
  // Only the request, signerName, expirationSeconds, and usages fields can be set on creation.
  // Other fields are derived by Kubernetes and cannot be modified by users.
  optional CertificateSigningRequestSpec spec = 2;

  // status contains information about whether the request is approved or denied,

  // applies to. The format is "group/version" just like the top-level
  // APIVersion field. It is necessary to track the version of a field
  // set because it cannot be automatically converted.
  optional string apiVersion = 3;

  // Time is the timestamp of when the ManagedFields entry was added. The
  // timestamp will also be updated if a field is added, the manager

  // prefixed with a single wildcard label (e.g. "*.foo.com").
  // The wildcard character '*' must appear by itself as the first DNS label and
  // matches only a single label. You cannot have a wildcard label by itself (e.g. Host == "*").
  // Requests will be matched against the Host field in the following way:
  // 1. If Host is precise, the request matches this rule if the http host header is equal to Host.

  // update. Value can be an absolute number (ex: 5) or a percentage of total
  // number of DaemonSet pods at the start of the update (ex: 10%). Absolute
  // number is calculated from percentage by rounding up.
  // This cannot be 0 if MaxSurge is 0
  // Default value is 1.
  // Example: when this is set to 30%, at most 30% of the total number of nodes
  // that should be running the daemon pod (i.e. status.desiredNumberScheduled)

  // reportingController is the name of the controller that emitted this Event, e.g. `kubernetes.io/kubelet`.
  // This field cannot be empty for new Events.
  // +optional
  optional string reportingController = 4;

  // reportingInstance is the ID of the controller instance, e.g. `kubelet-xyzf`.
  // This field cannot be empty for new Events and it can have at most 128 characters.
  // +optional
  optional string reportingInstance = 5;

  // The AdmissionPolicy cares about a request if it matches _all_ Constraints.
  // However, in order to prevent clusters from being put into an unstable state that cannot be recovered from via the API
  // ValidatingAdmissionPolicy cannot match ValidatingAdmissionPolicy and ValidatingAdmissionPolicyBinding.
  // Required.
  optional MatchResources matchConstraints = 2;

  // +optional
  repeated string defaultAddCapabilities = 2;

  // requiredDropCapabilities are the capabilities that will be dropped from the container.  These
  // are required to be dropped and cannot be added.
  // +optional
  repeated string requiredDropCapabilities = 3;

  // allowedCapabilities is a list of capabilities that can be requested to add to the container.

}

// FlowSchemaSpec describes how the FlowSchema's specification looks like.
message FlowSchemaSpec {
  // `priorityLevelConfiguration` should reference a PriorityLevelConfiguration in the cluster. If the reference cannot
  // be resolved, the FlowSchema will be ignored and marked as invalid in its status.
  // Required.
  optional PriorityLevelConfigurationReference priorityLevelConfiguration = 1;

}

// FlowSchemaSpec describes how the FlowSchema's specification looks like.
message FlowSchemaSpec {
  // `priorityLevelConfiguration` should reference a PriorityLevelConfiguration in the cluster. If the reference cannot
  // be resolved, the FlowSchema will be ignored and marked as invalid in its status.
  // Required.
  optional PriorityLevelConfigurationReference priorityLevelConfiguration = 1;

  // available.
  // +optional
  optional int32 minReplicas = 2;

  // maxReplicas is the upper limit for the number of replicas to which the autoscaler can scale up.
  // It cannot be less that minReplicas.
  optional int32 maxReplicas = 3;

  // metrics contains the specifications for which to use to calculate the
  // desired replica count (the maximum replica count across all metrics will