diff --git a/staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/types.go b/staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/types.go
index 02c604ce272..23b37debe25 100644
--- a/staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/types.go
+++ b/staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/types.go
@@ -82,7 +82,9 @@ type KMSConfig struct {
 	// +optional
 	CacheSize int `json:"cachesize,omitempty"`
 	// configfile is the path to the configuration file for the named KMS provider.
-	ConfigFile string `json:"configfile"`
+	// +optional
+	ConfigFile string `json:"configfile,omitempty"`
 	// the gRPC server listening address, for example "unix:///var/run/kms-provider.sock".
-	Endpoint string `json:"endpoint"`
+	// +optional
+	Endpoint string `json:"endpoint,omitempty"`
 }
diff --git a/staging/src/k8s.io/apiserver/pkg/storage/value/encrypt/envelope/grpc_service.go b/staging/src/k8s.io/apiserver/pkg/storage/value/encrypt/envelope/grpc_service.go
index 8d68a23a3ce..cf33ab05d42 100644
--- a/staging/src/k8s.io/apiserver/pkg/storage/value/encrypt/envelope/grpc_service.go
+++ b/staging/src/k8s.io/apiserver/pkg/storage/value/encrypt/envelope/grpc_service.go
@@ -49,7 +49,7 @@ type gRPCService struct {
 
 // NewGRPCService returns an envelope.Service which use gRPC to communicate the remote KMS provider.
 func NewGRPCService(endpoint string) (Service, error) {
-	glog.Infof("Configure KMS provider with endpoint: %s", endpoint)
+	glog.V(4).Infof("Configure KMS provider with endpoint: %s", endpoint)
 
 	protocol, addr, err := parseEndpoint(endpoint)
 	if err != nil {
@@ -106,7 +106,7 @@ func checkAPIVersion(kmsClient kmsapi.KMSServiceClient) error {
 			response.Version, kmsapiVersion)
 	}
 
-	glog.Infof("KMS provider %s initialized, version: %s", response.RuntimeName, response.RuntimeVersion)
+	glog.V(4).Infof("KMS provider %s initialized, version: %s", response.RuntimeName, response.RuntimeVersion)
 	return nil
 }