// Values are from tls package constants (https://golang.org/pkg/crypto/tls/#pkg-constants).
	MinTLSVersion string

	// HTTP2MaxStreamsPerConnection is the limit that the api server imposes on each client.
	// A value of zero means to use the default provided by golang's HTTP/2 support.
	HTTP2MaxStreamsPerConnection int

	// PermitPortSharing controls if SO_REUSEPORT is used when binding the port, which allows

				}(),
				SecureServing: (&apiserveroptions.SecureServingOptions{
					ServerCert: apiserveroptions.GeneratableKeyCert{
						CertDirectory: "/a/b/c",
						PairName:      "kube-scheduler",
					},
					HTTP2MaxStreamsPerConnection: 47,
				}).WithLoopback(),
				Authentication: &apiserveroptions.DelegatingAuthenticationOptions{
					CacheTTL:   10 * time.Second,
					ClientCert: apiserveroptions.ClientCertAuthenticationOptions{},

	// use the overridden concurrent streams setting or make the default of 250 explicit so we can size MaxUploadBufferPerConnection appropriately
	if s.HTTP2MaxStreamsPerConnection > 0 {
		http2Options.MaxConcurrentStreams = uint32(s.HTTP2MaxStreamsPerConnection)
	} else {
		// match http2.initialMaxConcurrentStreams used by clients

	// whose client is typically a proxy multiplexing many operations ---
	// notably including long-running ones --- into one HTTP/2 connection
	// into this server.  So allow many concurrent operations.
	sso.HTTP2MaxStreamsPerConnection = 1000

	return &RecommendedOptions{
		Etcd:           NewEtcdOptions(storagebackend.NewDefaultConfig(prefix, codec)),
		SecureServing:  sso.WithLoopback(),
		Authentication: NewDelegatingAuthenticationOptions(),

			BindPort:    6443,
			ServerCert: apiserveroptions.GeneratableKeyCert{
				CertDirectory: "/var/run/kubernetes",
				PairName:      "apiserver",
			},
			HTTP2MaxStreamsPerConnection: 42,
			Required:                     true,
		}).WithLoopback(),
		EventTTL: 1 * time.Hour,
		Audit: &apiserveroptions.AuditOptions{
			LogOptions: apiserveroptions.AuditLogOptions{

				BindPort:    6443,
				ServerCert: apiserveroptions.GeneratableKeyCert{
					CertDirectory: "/var/run/kubernetes",
					PairName:      "apiserver",
				},
				HTTP2MaxStreamsPerConnection: 42,
				Required:                     true,
			}).WithLoopback(),
			EventTTL: 1 * time.Hour,
			Audit: &apiserveroptions.AuditOptions{
				LogOptions: apiserveroptions.AuditLogOptions{

	// Values are from tls package constants (https://golang.org/pkg/crypto/tls/#pkg-constants).
	CipherSuites []uint16

	// HTTP2MaxStreamsPerConnection is the limit that the api server imposes on each client.
	// A value of zero means to use the default provided by golang's HTTP/2 support.
	HTTP2MaxStreamsPerConnection int

	// DisableHTTP2 indicates that http2 should not be enabled.
	DisableHTTP2 bool
}

			BindAddress: netutils.ParseIPSloppy("192.168.4.21"),
			ServerCert: apiserveroptions.GeneratableKeyCert{
				CertDirectory: "/a/b/c",
				PairName:      "kube-controller-manager",
			},
			HTTP2MaxStreamsPerConnection: 47,
		}).WithLoopback(),
		Authentication: &apiserveroptions.DelegatingAuthenticationOptions{
			CacheTTL:            10 * time.Second,
			TokenRequestTimeout: 10 * time.Second,