switch to simple liveness check

Signed-off-by: Chengxuan Xing <[email protected]>

Author: Chengxuan

internal/apiserver/server.go

@@ -488,9 +488,10 @@ func (as *apiServer) createMonitoringMuxRouter() *mux.Router {
 			promhttp.HandlerFor(metrics.Registry(), promhttp.HandlerOpts{})))
 	}
 	hf := ffapi.HandlerFactory{}
-	for _, route := range monitoringRoutes {
-		r.Path(route.Path).Methods(route.Method).Handler(hf.RouteHandler(route))
-	}
+	r.HandleFunc("/livez", hf.APIWrapper(func(res http.ResponseWriter, req *http.Request) (status int, err error) {
+		// a simple liveness check
+		return http.StatusOK, nil
+	}))
 	r.NotFoundHandler = hf.APIWrapper(func(_ http.ResponseWriter, req *http.Request) (status int, err error) {
 		return 404, i18n.NewError(req.Context(), i18n.Msg404NotFound)
 	})

internal/apiserver/spi_routes.go

@@ -36,8 +36,6 @@ var spiRoutes = append(globalRoutes([]*ffapi.Route{
 	})...,
 )
 
-var monitoringRoutes = []*ffapi.Route{}
-
 func namespacedSPIRoutes(routes []*ffapi.Route) []*ffapi.Route {
 	newRoutes := make([]*ffapi.Route, len(routes))
 	for i, route := range routes {