// IngressBackend describes all endpoints for a given service and port.
message IngressBackend {
  // service references a service as a backend.
  // This is a mutually exclusive setting with "Resource".
  // +optional
  optional IngressServiceBackend service = 4;

  // resource is an ObjectRef to another Kubernetes resource in the namespace
  // of the Ingress object. If resource is specified, a service.Name and

  // +optional
  optional IngressStatus status = 3;
}

// IngressBackend describes all endpoints for a given service and port.
message IngressBackend {
  // Specifies the name of the referenced service.
  // +optional
  optional string serviceName = 1;

  // Specifies the port of the referenced service.
  // +optional
  optional .k8s.io.apimachinery.pkg.util.intstr.IntOrString servicePort = 2;

  // +optional
  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
message ExternalMetricSource {
  // metricName is the name of the metric in question.
  optional string metricName = 1;

  // +optional
  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
message ExternalMetricSource {
  // metricName is the name of the metric in question.
  optional string metricName = 1;

  // that).
  // This list may be empty, but only if `clusterScope` is true.
  // +optional
  // +listType=set
  repeated string namespaces = 5;
}

// ServiceAccountSubject holds detailed information for service-account-kind subject.
message ServiceAccountSubject {
  // `namespace` is the namespace of matching ServiceAccount objects.
  // Required.
  optional string namespace = 1;

  // that).
  // This list may be empty, but only if `clusterScope` is true.
  // +optional
  // +listType=set
  repeated string namespaces = 5;
}

// ServiceAccountSubject holds detailed information for service-account-kind subject.
message ServiceAccountSubject {
  // `namespace` is the namespace of matching ServiceAccount objects.
  // Required.
  optional string namespace = 1;

  // that).
  // This list may be empty, but only if `clusterScope` is true.
  // +optional
  // +listType=set
  repeated string namespaces = 5;
}

// ServiceAccountSubject holds detailed information for service-account-kind subject.
message ServiceAccountSubject {
  // `namespace` is the namespace of matching ServiceAccount objects.
  // Required.
  optional string namespace = 1;

  // that).
  // This list may be empty, but only if `clusterScope` is true.
  // +optional
  // +listType=set
  repeated string namespaces = 5;
}

// ServiceAccountSubject holds detailed information for service-account-kind subject.
message ServiceAccountSubject {
  // `namespace` is the namespace of matching ServiceAccount objects.
  // Required.
  optional string namespace = 1;

  // that).
  // This list may be empty, but only if `clusterScope` is true.
  // +optional
  // +listType=set
  repeated string namespaces = 5;
}

// ServiceAccountSubject holds detailed information for service-account-kind subject.
message ServiceAccountSubject {
  // `namespace` is the namespace of matching ServiceAccount objects.
  // Required.
  optional string namespace = 1;

  // 'request' - Attributes of the admission request(/pkg/apis/admission/types.go#AdmissionRequest).
  // 'authorizer' - A CEL Authorizer. May be used to perform authorization checks for the principal (user or service account) of the request.
  //   See https://pkg.go.dev/k8s.io/apiserver/pkg/cel/library#Authz
  // 'authorizer.requestResource' - A CEL ResourceCheck constructed from the 'authorizer' and configured with the