feast-dev · franciscojavierarceo · Apr 14, 2026 · Mar 15, 2026 · Apr 5, 2026 · Apr 6, 2026
@@ -30,7 +30,6 @@ var (
 	TimeHistogramType = reflect.TypeOf((*TimeHistogram)(nil)).Elem()
 )
 
-
 func RegisterTimeHistogram(name, help, namespace string, labelNames []string, tag reflect.StructTag) (func(prometheus.Labels) interface{}, prometheus.Collector, error) {
 	f, collector, err := prometheusvanilla.BuildHistogram(name, help, namespace, labelNames, tag)
 	if err != nil {

@@ -194,4 +194,4 @@ func buildPostgresConnString(config map[string]interface{}) string {
 	}
 
 	return connURL.String()
-}
+}
@@ -2,6 +2,7 @@ package server
 
 import (
 	"context"
+	"crypto/tls"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -396,6 +397,34 @@ func (s *httpServer) Serve(host string, port int) error {
 	return err
 }
 
+func (s *httpServer) ServeTLS(host string, port int, certFile string, keyFile string) error {
+	mux := http.NewServeMux()
+	mux.Handle("/get-online-features", metricsMiddleware(recoverMiddleware(http.HandlerFunc(s.getOnlineFeatures))))
+	mux.Handle("/health", metricsMiddleware(http.HandlerFunc(healthCheckHandler)))
+	s.server = &http.Server{
+		Addr:         fmt.Sprintf("%s:%d", host, port),
+		Handler:      mux,
+		ReadTimeout:  5 * time.Second,
+		WriteTimeout: 10 * time.Second,
+		IdleTimeout:  15 * time.Second,
+		TLSConfig: &tls.Config{
+			MinVersion: tls.VersionTLS12,
+			CurvePreferences: []tls.CurveID{
+				tls.CurveP256,
+				tls.X25519MLKEM768,
+				//tls.SecP256r1MLKEM768,  // Only available in Go 1.26
+			},
+		},
+	}
+	err := s.server.ListenAndServeTLS(certFile, keyFile)
+	// Don't return the error if it's caused by graceful shutdown using Stop()
+	if err == http.ErrServerClosed {
+		return nil
+	}
+	log.Fatal().Stack().Err(err).Msg("Failed to start HTTPS server")
+	return err
+}
+
 func healthCheckHandler(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	fmt.Fprintf(w, "Healthy")

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"sync"
 	"syscall"
+	"time"
 
 	"github.com/feast-dev/feast/go/internal/feast"
 	"github.com/feast-dev/feast/go/internal/feast/registry"
@@ -36,15 +37,28 @@ import (
 
 var tracer trace.Tracer
 
+var newSignalStopChannel = func() (chan os.Signal, func()) {
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	return stop, func() {
+		signal.Stop(stop)
+	}
+}
+
 type ServerStarter interface {
 	StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions) error
 	StartGrpcServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions) error
+	StartHttpsServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions, certFile string, keyFile string) error
 }
 
 type RealServerStarter struct{}
 
 func (s *RealServerStarter) StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions) error {
-	return StartHttpServer(fs, host, port, metricsPort, writeLoggedFeaturesCallback, loggingOpts)
+	return StartHttpServer(fs, host, port, metricsPort, writeLoggedFeaturesCallback, loggingOpts, false, "", "")
+}
+
+func (s *RealServerStarter) StartHttpsServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions, certFile string, keyFile string) error {
+	return StartHttpServer(fs, host, port, metricsPort, writeLoggedFeaturesCallback, loggingOpts, true, certFile, keyFile)
 }
 
 func (s *RealServerStarter) StartGrpcServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions) error {
@@ -58,18 +72,22 @@ func main() {
 	port := 8080
 	metricsPort := 9090
 	server := RealServerStarter{}
+	certFile := ""
+	keyFile := ""
 	// Current Directory
 	repoPath, err := os.Getwd()
 	if err != nil {
 		log.Error().Stack().Err(err).Msg("Failed to get current directory")
 	}
 
-	flag.StringVar(&serverType, "type", serverType, "Specify the server type (http or grpc)")
+	flag.StringVar(&serverType, "type", serverType, "Specify the server type (http, https or grpc)")
 	flag.StringVar(&repoPath, "chdir", repoPath, "Repository path where feature store yaml file is stored")
 
 	flag.StringVar(&host, "host", host, "Specify a host for the server")
 	flag.IntVar(&port, "port", port, "Specify a port for the server")
 	flag.IntVar(&metricsPort, "metrics-port", metricsPort, "Specify a port for the metrics server")
+	flag.StringVar(&certFile, "tls-cert-file", "", "Path to the TLS certificate file")
+	flag.StringVar(&keyFile, "tls-key-file", "", "Path to the TLS key file")
 	flag.Parse()
 
 	// Initialize tracer
@@ -119,8 +137,10 @@ func main() {
 		err = server.StartHttpServer(fs, host, port, metricsPort, nil, loggingOptions)
 	} else if serverType == "grpc" {
 		err = server.StartGrpcServer(fs, host, port, metricsPort, nil, loggingOptions)
+	} else if serverType == "https" {
+		err = server.StartHttpsServer(fs, host, port, metricsPort, nil, loggingOptions, certFile, keyFile)
 	} else {
-		fmt.Println("Unknown server type. Please specify 'http' or 'grpc'.")
+		fmt.Println("Unknown server type. Please specify 'http' or 'grpc' or 'https'.")
 	}
 
 	if err != nil {
@@ -227,27 +247,34 @@ func StartGrpcServer(fs *feast.FeatureStore, host string, port int, metricsPort
 // StartHttpServerWithLogging starts HTTP server with enabled feature logging
 // Go does not allow direct assignment to package-level functions as a way to
 // mock them for tests
-func StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions) error {
+func StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort int, writeLoggedFeaturesCallback logging.OfflineStoreWriteCallback, loggingOpts *logging.LoggingOptions, httpsEnable bool, certFile string, keyFile string) error {
+	if httpsEnable && (certFile == "" || keyFile == "") {
+		return fmt.Errorf("--tls-cert-file and --tls-key-file must be provided for HTTPS server.")
+	}
+
 	loggingService, err := constructLoggingService(fs, writeLoggedFeaturesCallback, loggingOpts)
 	if err != nil {
 		return err
 	}
 	ser := server.NewHttpServer(fs, loggingService)
 	log.Info().Msgf("Starting a HTTP server on host %s, port %d", host, port)
+
 	// Start metrics server
-	metricsServer := &http.Server{Addr: fmt.Sprintf(":%d", metricsPort)}
+	mux := http.NewServeMux()
+	mux.Handle("/metrics", promhttp.Handler())
+	metricsServer := &http.Server{
+		Addr:    fmt.Sprintf(":%d", metricsPort),
+		Handler: mux,
+	}
 	go func() {
 		log.Info().Msgf("Starting metrics server on port %d", metricsPort)
-		mux := http.NewServeMux()
-		mux.Handle("/metrics", promhttp.Handler())
-		metricsServer.Handler = mux
 		if err := metricsServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
 			log.Error().Err(err).Msg("Failed to start metrics server")
 		}
 	}()
 
-	stop := make(chan os.Signal, 1)
-	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	stop, stopCleanup := newSignalStopChannel()
+	defer stopCleanup()
 
 	var wg sync.WaitGroup
 	wg.Add(1)
@@ -263,7 +290,9 @@ func StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort
 				log.Error().Err(err).Msg("Error when stopping the HTTP server")
 			}
 			log.Info().Msg("Stopping metrics server...")
-			if err := metricsServer.Shutdown(context.Background()); err != nil {
+			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+			defer cancel()
+			if err := metricsServer.Shutdown(ctx); err != nil {
 				log.Error().Err(err).Msg("Error stopping metrics server")
 			}
 			if loggingService != nil {
@@ -279,7 +308,11 @@ func StartHttpServer(fs *feast.FeatureStore, host string, port int, metricsPort
 		}
 	}()
 
-	err = ser.Serve(host, port)
+	if httpsEnable {
+		err = ser.ServeTLS(host, port, certFile, keyFile)
+	} else {
+		err = ser.Serve(host, port)
+	}
 	close(serverExited)
 	wg.Wait()
 	return err

@@ -1,12 +1,28 @@
 package main
 
 import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"math/big"
+	"net"
+	"net/http"
+	"os"
+	"strings"
+	"syscall"
 	"testing"
+	"time"
 
 	"github.com/feast-dev/feast/go/internal/feast"
 	"github.com/feast-dev/feast/go/internal/feast/server/logging"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
 )
 
 // MockServerStarter is a mock of ServerStarter interface for testing
@@ -67,3 +83,130 @@ func TestConstructLoggingService(t *testing.T) {
 	assert.NoError(t, err)
 	// Further assertions can be added here based on the expected behavior of constructLoggingService
 }
+
+func TestStartHttpsServerHealthEndpoint(t *testing.T) {
+	certPath, keyPath := createSelfSignedTLSFiles(t)
+	host := "127.0.0.1"
+	port := getFreePort(t)
+	metricsPort := getFreePort(t)
+
+	stop := make(chan os.Signal, 1)
+	prevNewSignalStopChannel := newSignalStopChannel
+	newSignalStopChannel = func() (chan os.Signal, func()) {
+		return stop, func() {}
+	}
+	t.Cleanup(func() {
+		newSignalStopChannel = prevNewSignalStopChannel
+	})
+
+	errCh := make(chan error, 1)
+	go func() {
+		errCh <- StartHttpServer(&feast.FeatureStore{}, host, port, metricsPort, nil, &logging.LoggingOptions{}, true, certPath, keyPath)
+	}()
+
+	httpsClient := &http.Client{
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, //nolint:gosec
+		},
+	}
+	t.Cleanup(httpsClient.CloseIdleConnections)
+
+	url := fmt.Sprintf("https://%s:%d/health", host, port)
+
+	var (
+		resp *http.Response
+		err  error
+	)
+	require.Eventually(t, func() bool {
+		resp, err = httpsClient.Get(url)
+		if err != nil {
+			return false
+		}
+		return true
+	}, 5*time.Second, 100*time.Millisecond)
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		if resp != nil && resp.Body != nil {
+			_ = resp.Body.Close()
+		}
+	})
+
+	body, readErr := io.ReadAll(resp.Body)
+	require.NoError(t, readErr)
+
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+	assert.Equal(t, "Healthy", strings.TrimSpace(string(body)))
+
+	stop <- syscall.SIGTERM
+
+	select {
+	case startErr := <-errCh:
+		require.NoError(t, startErr)
+	case <-time.After(5 * time.Second):
+		t.Fatal("StartHttpsServer did not shutdown within timeout")
+	}
+}
+
+func TestStartHttpsServerTLSFilesRequired(t *testing.T) {
+	err := StartHttpServer(&feast.FeatureStore{}, "127.0.0.1", 0, 0, nil, &logging.LoggingOptions{}, true, "", "")
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "--tls-cert-file and --tls-key-file must be provided")
+}
+
+func getFreePort(t *testing.T) int {
+	t.Helper()
+
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	require.NoError(t, err)
+	defer func() {
+		_ = listener.Close()
+	}()
+
+	addr, ok := listener.Addr().(*net.TCPAddr)
+	require.True(t, ok)
+	return addr.Port
+}
+
+func createSelfSignedTLSFiles(t *testing.T) (string, string) {
+	t.Helper()
+
+	priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	require.NoError(t, err)
+
+	tmpl := x509.Certificate{
+		SerialNumber: big.NewInt(1),
+		Subject: pkix.Name{
+			CommonName: "localhost",
+		},
+		NotBefore:             time.Now().Add(-1 * time.Hour),
+		NotAfter:              time.Now().Add(24 * time.Hour),
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		DNSNames:              []string{"localhost"},
+		IPAddresses:           []net.IP{net.ParseIP("127.0.0.1")},
+	}
+
+	der, err := x509.CreateCertificate(rand.Reader, &tmpl, &tmpl, &priv.PublicKey, priv)
+	require.NoError(t, err)
+
+	certFile, err := os.CreateTemp(t.TempDir(), "feast-test-cert-*.pem")
+	require.NoError(t, err)
+	defer func() {
+		_ = certFile.Close()
+	}()
+
+	keyFile, err := os.CreateTemp(t.TempDir(), "feast-test-key-*.pem")
+	require.NoError(t, err)
+	defer func() {
+		_ = keyFile.Close()
+	}()
+
+	err = pem.Encode(certFile, &pem.Block{Type: "CERTIFICATE", Bytes: der})
+	require.NoError(t, err)
+
+	err = pem.Encode(keyFile, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
+	require.NoError(t, err)
+
+	return certFile.Name(), keyFile.Name()
+}
-Original file line number
+Diff line change
@@ Expand Up @@
     	}
     	return connURL.String()
-    }
+    }