func init() {
	// grpcprom auto-registers (via an init function) their client metrics, since we are opting out of
	// using the global prometheus registry and using our own wrapped global registry,
	// we need to explicitly register these metrics to our global registry here.
	// For reference: https://github.com/kubernetes/kubernetes/pull/81387
	legacyregistry.RawMustRegister(grpcprom.DefaultClientMetrics)

import (
	"context"
	"crypto/tls"
	"crypto/x509"
	"encoding/json"
	"fmt"
	"net"
	"net/http"
	"os"
	"strings"
	"sync"
	"sync/atomic"
	"time"

	"github.com/fsnotify/fsnotify"
	grpcprom "github.com/grpc-ecosystem/go-grpc-prometheus"
	"golang.org/x/net/http2"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
	"google.golang.org/grpc/reflection"
	corev1 "k8s.io/api/core/v1"

	return &ExtAuthzServer{
		grpcV2:   &extAuthzServerV2{},
		grpcV3:   &extAuthzServerV3{},
		httpPort: make(chan int, 1),
		grpcPort: make(chan int, 1),
	}
}

func main() {
	flag.Parse()
	s := NewExtAuthzServer()
	go s.run(fmt.Sprintf(":%s", *httpPort), fmt.Sprintf(":%s", *grpcPort))
	defer s.stop()

	// Wait for the process to be shutdown.
	sigs := make(chan os.Signal, 1)