optional MetricIdentifier metric = 1;

  // current contains the current value for the given metric
  optional MetricValueStatus current = 2;
}

// HPAScalingPolicy is a single policy which must hold true for a specified past interval.
message HPAScalingPolicy {
  // type is used to specify the scaling policy.
  optional string type = 1;

  // value contains the amount of change which is permitted by the policy.

}

// DeploymentCondition describes the state of a deployment at a certain point.
message DeploymentCondition {
  // Type of deployment condition.
  optional string type = 1;

  // Status of the condition, one of True, False, Unknown.
  optional string status = 2;

  // The last time this condition was updated.
  optional k8s.io.apimachinery.pkg.apis.meta.v1.Time lastUpdateTime = 6;

  // manner as validation expressions.
  //
  // The exact matching logic is (in order):
  //   1. If ANY matchCondition evaluates to FALSE, the policy is skipped.
  //   2. If ALL matchConditions evaluate to TRUE, the policy is evaluated.
  //   3. If any matchCondition evaluates to an error (but none are FALSE):
  //      - If failurePolicy=Fail, reject the request
  //      - If failurePolicy=Ignore, the policy is skipped
  //

// a HorizontalPodAutoscaler at a certain point.
message HorizontalPodAutoscalerCondition {
  // type describes the current condition
  optional string type = 1;

  // status is the status of the condition (True, False, Unknown)
  optional string status = 2;

  // lastTransitionTime is the last time the condition transitioned from
  // one status to another
  // +optional

message PodAttachOptions {
  // Stdin if true, redirects the standard input stream of the pod for this call.
  // Defaults to false.
  // +optional
  optional bool stdin = 1;

  // Stdout if true indicates that stdout is to be redirected for the attach call.
  // Defaults to true.
  // +optional
  optional bool stdout = 2;

  // Stderr if true indicates that stderr is to be redirected for the attach call.

//
// +protobuf=true
// +protobuf.embed=string
// +protobuf.options.marshal=false
// +protobuf.options.(gogoproto.goproto_stringer)=false
// +k8s:deepcopy-gen=true
// +k8s:openapi-gen=true
message Quantity {
  optional string string = 1;
}

// QuantityValue makes it possible to use a Quantity as value for a command
// line parameter.
//
// +protobuf=true
// +protobuf.embed=string

  // during mount operations, if set to true.
  // If set to false, pod information will not be passed on mount.
  // Default is false.
  //
  // The CSI driver specifies podInfoOnMount as part of driver deployment.
  // If true, Kubelet will pass pod information as VolumeContext in the CSI NodePublishVolume() calls.

  // +optional
  optional string name = 3;

  // UID of the referent.
  // +optional
  optional string uID = 4;
}

// ExtraValue masks the value so protobuf can generate
// +protobuf.nullable=true
// +protobuf.options.(gogoproto.goproto_stringer)=false
message ExtraValue {
  // items, if empty, will result in an empty slice

  repeated string items = 1;
}

  // according to whatever system is managing the endpoint. A nil value
  // indicates an unknown state. In most cases consumers should interpret this
  // unknown state as ready. For compatibility reasons, ready should never be
  // "true" for terminating endpoints, except when the normal readiness
  // behavior is being explicitly overridden, for example when the associated
  // Service has set the publishNotReadyAddresses flag.
  // +optional

  // Currently only Ready.
  // More info: http://kubernetes.io/docs/user-guide/carp-states#carp-conditions
  optional string type = 1;

  // Status is the status of the condition.
  // Can be True, False, Unknown.
  // More info: http://kubernetes.io/docs/user-guide/carp-states#carp-conditions
  optional string status = 2;

  // Last time we probed the condition.
  // +optional