)

var registerMetricsOnce sync.Once

var (
	// streamTranslatorRequestsTotal counts the number of requests that were handled by
	// the StreamTranslatorProxy.
	streamTranslatorRequestsTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      subsystem,
			Name:           "stream_translator_requests_total",

)

var (
	// nodePortRepairPortErrors indicates the number of errors found by the repair loop
	// divided by the type of error:
	// leak, repair, full, outOfRange, duplicate, unknown
	nodePortRepairPortErrors = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "port_errors_total",

	"k8s.io/component-base/metrics/legacyregistry"
)

// RootCACertPublisher - subsystem name used by root_ca_cert_publisher
const RootCACertPublisher = "root_ca_cert_publisher"

var (
	syncCounter = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      RootCACertPublisher,
			Name:           "sync_total",
			Help:           "Number of namespace syncs happened in root ca cert publisher.",
			StabilityLevel: metrics.ALPHA,

func RegisterMetrics() {
	registerMetrics.Do(func() {
		legacyregistry.MustRegister(requestTotal)
		legacyregistry.MustRegister(requestLatency)
	})
}

var (
	requestTotal = compbasemetrics.NewCounterVec(
		&compbasemetrics.CounterOpts{
			Name:           "apiserver_delegated_authz_request_total",
			Help:           "Number of HTTP requests partitioned by status code.",
			StabilityLevel: compbasemetrics.ALPHA,
		},

	"k8s.io/component-base/metrics/legacyregistry"
)

const (
	namespace = "apiserver"
	subsystem = "authorization_config_controller"
)

var (
	authorizationConfigAutomaticReloadsTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "automatic_reloads_total",

)

const (
	kubeletSubsystem = "kubelet"
)

var (
	// HTTPRequests tracks the number of the http requests received since the server started.
	HTTPRequests = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeletSubsystem,
			Name:           "http_requests_total",
			Help:           "Number of the http requests received since the server started",
			StabilityLevel: metrics.ALPHA,

	"k8s.io/component-base/metrics"
	"k8s.io/component-base/metrics/legacyregistry"
)

const (
	namespace = "apiserver"
	subsystem = "authorization"
)

var (
	authorizationDecisionsTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "decisions_total",

	// apiserver_envelope_encryption_key_id_hash_total{apiserver_id_hash="sha256",key_id_hash="sha256",
	// provider_name="providerName",transformation_type="from_storage"} 1
	KeyIDHashTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Namespace:      namespace,
			Subsystem:      subsystem,
			Name:           "key_id_hash_total",

	)

	// TODO(a-robinson): Add unit tests for the handling of these metrics once
	// the upstream library supports it.
	requestCounter = compbasemetrics.NewCounterVec(
		&compbasemetrics.CounterOpts{
			Subsystem:      APIServerComponent,
			Name:           "request_total",

			Name:           zoneNoUnhealthyNodesKey,
			Help:           "Gauge measuring number of not Ready Nodes per zones.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"zone"},
	)
	evictionsTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      nodeControllerSubsystem,
			Name:           evictionsTotalKey,
			Help:           "Number of Node evictions that happened since current instance of NodeController started.",