// a network host (e.g. "foo.bar.com") or "wildcard", which is a domain name
  // 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:

  // +optional
  optional int32 minReadySeconds = 4;

  // Selector is a label query over pods that should match the replica count.
  // Label keys and values that must match in order to be controlled by this replica set.
  // It must match the pod template's labels.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 2;

  optional string group = 1;

  optional string version = 2;

  optional string resource = 3;
}

// A label selector is a label query over a set of resources. The result of matchLabels and
// matchExpressions are ANDed. An empty label selector matches all objects. A null
// label selector matches no objects.
// +structType=atomic
message LabelSelector {

  //
  // Validation requirements:
  //  1. certificate must contain one or more PEM blocks.
  //  2. All PEM blocks must have the "CERTIFICATE" label, contain no headers, and the encoded data
  //   must be a BER-encoded ASN.1 Certificate structure as described in section 4 of RFC5280.

  optional int32 replicas = 1;

  // selector is the label query over pods that should match the replicas count. This is same
  // as the label selector but in the string format to avoid introspection
  // by clients. The string will be in the same format as the query-param syntax.
  // More info about label selectors: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
  // +optional

  optional int32 replicas = 1;

  // selector is a label query over pods that should match the replicas count. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
  // +optional
  map<string, string> selector = 2;

  // targetSelector is the label selector for pods that should match the replicas count. This is a serializated

  // absence of the evicted pod.  So for example you can prevent all voluntary
  // evictions by specifying "100%".
  // +optional
  optional k8s.io.apimachinery.pkg.util.intstr.IntOrString minAvailable = 1;

  // Label query over pods whose evictions are managed by the disruption
  // budget.
  // A null selector selects no pods.
  // An empty selector ({}) also selects no pods, which differs from standard behavior of selecting all pods.

message MetricIdentifier {
  // name is the name of the given metric
  optional string name = 1;

  // selector is the string-encoded form of a standard kubernetes label selector for the given metric
  // When set, it is passed as an additional parameter to the metrics server for more specific metrics scoping.
  // When unset, just the metricName will be used to gather metrics.
  // +optional

  //         "staging"
  //       ]
  //     }
  //   ]
  // }
  //
  // See
  // https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
  // for more examples of label selectors.
  //
  // Default to the empty LabelSelector, which matches everything.
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector namespaceSelector = 1;

  // +optional
  optional int32 minReadySeconds = 4;

  // Selector is a label query over pods that should match the replica count.
  // Label keys and values that must match in order to be controlled by this replica set.
  // It must match the pod template's labels.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 2;