Modify health check endpoint and add HEAD method

server/rpc/httphealth/httphealth.go

@@ -24,8 +24,8 @@ import (
 	"connectrpc.com/grpchealth"
 )
 
-// serviceName is the path for the health check endpoint.
-const serviceName = "/healthz/"
+// HealthV1ServiceName is the fully-qualified name of the v1 version of the health service.
+const HealthV1ServiceName = "/yorkie.v1.YorkieService/health"
 
 // CheckResponse represents the response structure for health checks.
 type CheckResponse struct {
@@ -35,35 +35,32 @@ type CheckResponse struct {
 // NewHandler creates a new HTTP handler for health checks.
 func NewHandler(checker grpchealth.Checker) (string, http.Handler) {
 	check := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodGet {
+		if r.Method != http.MethodGet && r.Method != http.MethodHead {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
 			return
 		}
-
 		var checkRequest grpchealth.CheckRequest
-		if service := r.URL.Query().Get("service"); service != "" {
+		service := r.URL.Query().Get("service")
+		if service != "" {
 			checkRequest.Service = service
 		}
-
 		checkResponse, err := checker.Check(r.Context(), &checkRequest)
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusNotFound)
 			return
 		}
-
 		resp, err := json.Marshal(CheckResponse{checkResponse.Status.String()})
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
-
-		if _, err := w.Write(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
+		if r.Method == http.MethodGet {
+			if _, err := w.Write(resp); err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+			}
 		}
 	})
-
-	return serviceName, check
+	return HealthV1ServiceName, check
 }

test/integration/health_test.go

@@ -26,12 +26,11 @@ import (
 
 	"connectrpc.com/grpchealth"
 	"github.com/stretchr/testify/assert"
+	"github.com/yorkie-team/yorkie/api/yorkie/v1/v1connect"
+	"github.com/yorkie-team/yorkie/server/rpc/httphealth"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
-
-	"github.com/yorkie-team/yorkie/api/yorkie/v1/v1connect"
-	"github.com/yorkie-team/yorkie/server/rpc/httphealth"
 )
 
 var services = []string{
@@ -55,7 +54,7 @@ func TestRPCHealthCheck(t *testing.T) {
 	t.Run("Service: default", func(t *testing.T) {
 		resp, err := cli.Check(context.Background(), &healthpb.HealthCheckRequest{})
 		assert.NoError(t, err)
-		assert.Equal(t, resp.Status, healthpb.HealthCheckResponse_SERVING)
+		assert.Equal(t, healthpb.HealthCheckResponse_SERVING, resp.Status)
 	})
 
 	// check all services
@@ -66,7 +65,7 @@ func TestRPCHealthCheck(t *testing.T) {
 				Service: service,
 			})
 			assert.NoError(t, err)
-			assert.Equal(t, resp.Status, healthpb.HealthCheckResponse_SERVING)
+			assert.Equal(t, healthpb.HealthCheckResponse_SERVING, resp.Status)
 		})
 	}
 
@@ -79,48 +78,84 @@ func TestRPCHealthCheck(t *testing.T) {
 	})
 }
 
-func TestHTTPHealthCheck(t *testing.T) {
+func TestHTTPGETHealthCheck(t *testing.T) {
 	// check default service
 	t.Run("Service: default", func(t *testing.T) {
-		resp, err := http.Get("http://" + defaultServer.RPCAddr() + "/healthz/")
+		resp, err := http.Get("http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName)
 		assert.NoError(t, err)
 		defer func() {
 			assert.NoError(t, resp.Body.Close())
 		}()
-		assert.Equal(t, resp.StatusCode, http.StatusOK)
+		assert.Equal(t, http.StatusOK, resp.StatusCode)
 
 		var healthResp httphealth.CheckResponse
 		err = json.NewDecoder(resp.Body).Decode(&healthResp)
 		assert.NoError(t, err)
-		assert.Equal(t, healthResp.Status, grpchealth.StatusServing.String())
+		assert.Equal(t, grpchealth.StatusServing.String(), healthResp.Status)
 	})
 
 	// check all services
 	for _, s := range services {
 		service := s
 		t.Run("Service: "+service, func(t *testing.T) {
-			url := "http://" + defaultServer.RPCAddr() + "/healthz/?service=" + service
+			url := "http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName + "?service=" + service
 			resp, err := http.Get(url)
 			assert.NoError(t, err)
 			defer func() {
 				assert.NoError(t, resp.Body.Close())
 			}()
-			assert.Equal(t, resp.StatusCode, http.StatusOK)
+			assert.Equal(t, http.StatusOK, resp.StatusCode)
 
 			var healthResp httphealth.CheckResponse
 			err = json.NewDecoder(resp.Body).Decode(&healthResp)
 			assert.NoError(t, err)
-			assert.Equal(t, healthResp.Status, grpchealth.StatusServing.String())
+			assert.Equal(t, grpchealth.StatusServing.String(), healthResp.Status)
+		})
+	}
+
+	// check unknown service
+	t.Run("Service: unknown", func(t *testing.T) {
+		resp, err := http.Get("http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName + "?service=unknown")
+		assert.NoError(t, err)
+		defer func() {
+			assert.NoError(t, resp.Body.Close())
+		}()
+		assert.Equal(t, http.StatusNotFound, resp.StatusCode)
+	})
+}
+
+func TestHTTPHEADHealthCheck(t *testing.T) {
+	// check default service
+	t.Run("Service: default", func(t *testing.T) {
+		resp, err := http.Head("http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName)
+		assert.NoError(t, err)
+		defer func() {
+			assert.NoError(t, resp.Body.Close())
+		}()
+		assert.Equal(t, http.StatusOK, resp.StatusCode)
+	})
+
+	// check all services
+	for _, s := range services {
+		service := s
+		t.Run("Service: "+service, func(t *testing.T) {
+			url := "http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName + "?service=" + service
+			resp, err := http.Head(url)
+			assert.NoError(t, err)
+			defer func() {
+				assert.NoError(t, resp.Body.Close())
+			}()
+			assert.Equal(t, http.StatusOK, resp.StatusCode)
 		})
 	}
 
 	// check unknown service
 	t.Run("Service: unknown", func(t *testing.T) {
-		resp, err := http.Get("http://" + defaultServer.RPCAddr() + "/healthz/?service=unknown")
+		resp, err := http.Head("http://" + defaultServer.RPCAddr() + httphealth.HealthV1ServiceName + "?service=unknown")
 		assert.NoError(t, err)
 		defer func() {
 			assert.NoError(t, resp.Body.Close())
 		}()
-		assert.Equal(t, resp.StatusCode, http.StatusNotFound)
+		assert.Equal(t, http.StatusNotFound, resp.StatusCode)
 	})
 }