func()

in pkg/cmd/admissioncontroller/main.go [147:181]

• 31 lines of code
• 3 McCabe index (conditional complexity)

func (wh *WebHook) Startup(certs *tls.Certificate) {
	wh.Lock()
	defer wh.Unlock()

	mux := http.NewServeMux()
	mux.HandleFunc(healthURL, wh.ac.Health)
	mux.HandleFunc(mutateURL, wh.ac.Serve)
	mux.HandleFunc(validateConfURL, wh.ac.Serve)

	wh.server = &http.Server{
		Addr: fmt.Sprintf(":%v", wh.port),
		TLSConfig: &tls.Config{
			MinVersion:   tls.VersionTLS12,           // No SSL, TLS 1.0 or TLS 1.1 support
			NextProtos:   []string{"h2", "http/1.1"}, // prefer HTTP/2 over HTTP/1.1
			CipherSuites: wh.getCipherSuites(),       // limit cipher suite to secure ones
			Certificates: []tls.Certificate{*certs},
		},
		Handler:           mux,
		ReadHeaderTimeout: 10 * time.Second,
	}

	go func() {
		if err := wh.server.ListenAndServeTLS("", ""); err != nil {
			if errors.Is(err, http.ErrServerClosed) {
				log.Log(log.Admission).Info("existing server closed")
			} else {
				log.Log(log.Admission).Fatal("failed to start admission controller", zap.Error(err))
			}
		}
	}()

	log.Log(log.Admission).Info("the admission controller started",
		zap.Int("port", HTTPPort),
		zap.Strings("listeningOn", []string{healthURL, mutateURL, validateConfURL}))
}