diff --git a/cmd/kubelet/app/server.go b/cmd/kubelet/app/server.go
index c84979fd617..7b80cdde30f 100644
--- a/cmd/kubelet/app/server.go
+++ b/cmd/kubelet/app/server.go
@@ -31,6 +31,7 @@ import (
 	"path"
 	"path/filepath"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/coreos/go-systemd/daemon"
@@ -207,6 +208,10 @@ HTTP server: The kubelet can also listen for HTTP and respond to a simple API
 				klog.Fatal(err)
 			}
 
+			if (kubeletConfig.KubeletCgroups != "" && kubeletConfig.KubeReservedCgroup != "") && (0 != strings.Index(kubeletConfig.KubeletCgroups, kubeletConfig.KubeReservedCgroup)) {
+				klog.Warning("unsupported configuration:KubeletCgroups is not within KubeReservedCgroup")
+			}
+
 			// use dynamic kubelet config, if enabled
 			var kubeletConfigController *dynamickubeletconfig.Controller
 			if dynamicConfigDir := kubeletFlags.DynamicConfigDir.Value(); len(dynamicConfigDir) > 0 {