fix websocket bug (#2058)

pkg/apiserver/filters/kubeapiserver.go

 package filters
 
 import (
+	"k8s.io/apimachinery/pkg/util/net"
 	"k8s.io/apimachinery/pkg/util/proxy"
 	"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
 	"k8s.io/client-go/rest"
@@ -20,6 +21,16 @@ func WithKubeAPIServer(handler http.Handler, config *rest.Config, failed proxy.E
 		return handler
 	}
 
+	tlsConfig, err := net.TLSClientConfig(defaultTransport)
+	if err != nil {
+		klog.V(5).Infof("Unable to unwrap transport %T to get at TLS config: %v", defaultTransport, err)
+	}
+
+	// since http2 doesn't support websocket, we need to disable http2 when using websocket
+	if supportsHTTP11(tlsConfig.NextProtos) {
+		tlsConfig.NextProtos = []string{"http/1.1"}
+	}
+
 	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		info, ok := request.RequestInfoFrom(req.Context())
 		if !ok {
@@ -33,10 +44,9 @@ func WithKubeAPIServer(handler http.Handler, config *rest.Config, failed proxy.E
 			s.Host = kubernetes.Host
 			s.Scheme = kubernetes.Scheme
 
-			// Do not cover k8s client authorization header
+			// make sure we don't override kubernetes's authorization
 			req.Header.Del("Authorization")
 			httpProxy := proxy.NewUpgradeAwareHandler(&s, defaultTransport, true, false, failed)
-			httpProxy.UpgradeTransport = proxy.NewUpgradeRequestRoundTripper(defaultTransport, defaultTransport)
 			httpProxy.ServeHTTP(w, req)
 			return
 		}
@@ -44,3 +54,18 @@ func WithKubeAPIServer(handler http.Handler, config *rest.Config, failed proxy.E
 		handler.ServeHTTP(w, req)
 	})
 }
+
+// copy from https://github.com/kubernetes/apimachinery/blob/master/pkg/util/proxy/dial.go
+func supportsHTTP11(nextProtos []string) bool {
+	if len(nextProtos) == 0 {
+		return true
+	}
+
+	for _, proto := range nextProtos {
+		if proto == "http/1.1" {
+			return true
+		}
+	}
+
+	return false
+}

pkg/models/tenant/tenent_test.go

@@ -290,7 +290,7 @@ func prepare() Interface {
 	k8sClient := fakek8s.NewSimpleClientset()
 	istioClient := fakeistio.NewSimpleClientset()
 	appClient := fakeapp.NewSimpleClientset()
-	fakeInformerFactory := informers.NewInformerFactories(k8sClient, ksClient, istioClient, appClient)
+	fakeInformerFactory := informers.NewInformerFactories(k8sClient, ksClient, istioClient, appClient, nil, nil)
 
 	for _, workspace := range workspaces {
 		fakeInformerFactory.KubeSphereSharedInformerFactory().Tenant().V1alpha1().