630 lines
18 KiB
Go
630 lines
18 KiB
Go
/*
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*
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* Copyright 2014 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpc
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import (
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"io"
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"math"
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"net"
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"testing"
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"time"
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"golang.org/x/net/context"
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"golang.org/x/net/http2"
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"google.golang.org/grpc/connectivity"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/keepalive"
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"google.golang.org/grpc/naming"
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"google.golang.org/grpc/resolver"
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"google.golang.org/grpc/resolver/manual"
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_ "google.golang.org/grpc/resolver/passthrough"
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"google.golang.org/grpc/test/leakcheck"
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"google.golang.org/grpc/testdata"
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)
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func assertState(wantState connectivity.State, cc *ClientConn) (connectivity.State, bool) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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var state connectivity.State
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for state = cc.GetState(); state != wantState && cc.WaitForStateChange(ctx, state); state = cc.GetState() {
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}
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return state, state == wantState
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}
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func TestDialWithMultipleBackendsNotSendingServerPreface(t *testing.T) {
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defer leakcheck.Check(t)
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numServers := 2
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servers := make([]net.Listener, numServers)
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var err error
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for i := 0; i < numServers; i++ {
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servers[i], err = net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("Error while listening. Err: %v", err)
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}
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}
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dones := make([]chan struct{}, numServers)
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for i := 0; i < numServers; i++ {
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dones[i] = make(chan struct{})
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}
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for i := 0; i < numServers; i++ {
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go func(i int) {
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defer func() {
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close(dones[i])
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}()
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conn, err := servers[i].Accept()
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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defer conn.Close()
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switch i {
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case 0: // 1st server accepts the connection and immediately closes it.
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case 1: // 2nd server accepts the connection and sends settings frames.
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framer := http2.NewFramer(conn, conn)
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if err := framer.WriteSettings(http2.Setting{}); err != nil {
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t.Errorf("Error while writing settings frame. %v", err)
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return
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}
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conn.SetDeadline(time.Now().Add(time.Second))
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buf := make([]byte, 1024)
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for { // Make sure the connection stays healthy.
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_, err = conn.Read(buf)
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if err == nil {
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continue
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}
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if nerr, ok := err.(net.Error); !ok || !nerr.Timeout() {
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t.Errorf("Server expected the conn.Read(_) to timeout instead got error: %v", err)
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}
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return
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}
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}
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}(i)
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}
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r, cleanup := manual.GenerateAndRegisterManualResolver()
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defer cleanup()
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resolvedAddrs := make([]resolver.Address, numServers)
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for i := 0; i < numServers; i++ {
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resolvedAddrs[i] = resolver.Address{Addr: servers[i].Addr().String()}
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}
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r.InitialAddrs(resolvedAddrs)
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client, err := Dial(r.Scheme()+":///test.server", WithInsecure())
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if err != nil {
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t.Errorf("Dial failed. Err: %v", err)
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} else {
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defer client.Close()
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}
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time.Sleep(time.Second) // Close the servers after a second for cleanup.
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for _, s := range servers {
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s.Close()
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}
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for _, done := range dones {
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<-done
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}
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}
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func TestDialWaitsForServerSettings(t *testing.T) {
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defer leakcheck.Check(t)
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server, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("Error while listening. Err: %v", err)
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}
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defer server.Close()
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done := make(chan struct{})
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sent := make(chan struct{})
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dialDone := make(chan struct{})
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go func() { // Launch the server.
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defer func() {
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close(done)
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}()
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conn, err := server.Accept()
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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defer conn.Close()
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// Sleep so that if the test were to fail it
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// will fail more often than not.
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time.Sleep(100 * time.Millisecond)
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framer := http2.NewFramer(conn, conn)
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close(sent)
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if err := framer.WriteSettings(http2.Setting{}); err != nil {
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t.Errorf("Error while writing settings. Err: %v", err)
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return
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}
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<-dialDone // Close conn only after dial returns.
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}()
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ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
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defer cancel()
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client, err := DialContext(ctx, server.Addr().String(), WithInsecure(), WithWaitForHandshake(), WithBlock())
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close(dialDone)
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if err != nil {
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cancel()
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t.Fatalf("Error while dialing. Err: %v", err)
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}
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defer client.Close()
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select {
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case <-sent:
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default:
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t.Fatalf("Dial returned before server settings were sent")
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}
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<-done
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}
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func TestCloseConnectionWhenServerPrefaceNotReceived(t *testing.T) {
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mctBkp := minConnectTimeout
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// Call this only after transportMonitor goroutine has ended.
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defer func() {
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minConnectTimeout = mctBkp
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}()
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defer leakcheck.Check(t)
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minConnectTimeout = time.Millisecond * 500
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server, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("Error while listening. Err: %v", err)
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}
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defer server.Close()
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done := make(chan struct{})
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clientDone := make(chan struct{})
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go func() { // Launch the server.
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defer func() {
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if done != nil {
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close(done)
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}
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}()
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conn1, err := server.Accept()
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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defer conn1.Close()
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// Don't send server settings and make sure the connection is closed.
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time.Sleep(time.Millisecond * 1500) // Since the first backoff is for a second.
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conn1.SetDeadline(time.Now().Add(time.Second))
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b := make([]byte, 24)
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for {
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// Make sure the connection was closed by client.
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_, err = conn1.Read(b)
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if err == nil {
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continue
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}
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if err != io.EOF {
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t.Errorf(" conn1.Read(_) = _, %v, want _, io.EOF", err)
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return
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}
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break
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}
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conn2, err := server.Accept() // Accept a reconnection request from client.
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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defer conn2.Close()
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framer := http2.NewFramer(conn2, conn2)
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if err := framer.WriteSettings(http2.Setting{}); err != nil {
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t.Errorf("Error while writing settings. Err: %v", err)
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return
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}
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time.Sleep(time.Millisecond * 1500) // Since the first backoff is for a second.
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conn2.SetDeadline(time.Now().Add(time.Millisecond * 500))
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for {
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// Make sure the connection stays open and is closed
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// only by connection timeout.
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_, err = conn2.Read(b)
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if err == nil {
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continue
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}
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if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
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return
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}
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t.Errorf("Unexpected error while reading. Err: %v, want timeout error", err)
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break
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}
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close(done)
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done = nil
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<-clientDone
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}()
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client, err := Dial(server.Addr().String(), WithInsecure())
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if err != nil {
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t.Fatalf("Error while dialing. Err: %v", err)
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}
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<-done
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// TODO: The code from BEGIN to END should be delete once issue
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// https://github.com/grpc/grpc-go/issues/1750 is fixed.
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// BEGIN
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// Set underlying addrConns state to Shutdown so that no reconnect
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// attempts take place and thereby resetting minConnectTimeout is
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// race free.
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client.mu.Lock()
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addrConns := client.conns
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client.mu.Unlock()
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for ac := range addrConns {
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ac.mu.Lock()
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ac.state = connectivity.Shutdown
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ac.mu.Unlock()
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}
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// END
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client.Close()
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close(clientDone)
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}
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func TestBackoffWhenNoServerPrefaceReceived(t *testing.T) {
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defer leakcheck.Check(t)
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server, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("Error while listening. Err: %v", err)
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}
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defer server.Close()
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done := make(chan struct{})
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go func() { // Launch the server.
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defer func() {
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close(done)
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}()
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conn, err := server.Accept() // Accept the connection only to close it immediately.
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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prevAt := time.Now()
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conn.Close()
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var prevDuration time.Duration
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// Make sure the retry attempts are backed off properly.
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for i := 0; i < 3; i++ {
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conn, err := server.Accept()
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if err != nil {
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t.Errorf("Error while accepting. Err: %v", err)
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return
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}
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meow := time.Now()
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conn.Close()
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dr := meow.Sub(prevAt)
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if dr <= prevDuration {
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t.Errorf("Client backoff did not increase with retries. Previous duration: %v, current duration: %v", prevDuration, dr)
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return
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}
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prevDuration = dr
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prevAt = meow
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}
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}()
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client, err := Dial(server.Addr().String(), WithInsecure())
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if err != nil {
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t.Fatalf("Error while dialing. Err: %v", err)
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}
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defer client.Close()
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<-done
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}
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func TestConnectivityStates(t *testing.T) {
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defer leakcheck.Check(t)
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servers, resolver, cleanup := startServers(t, 2, math.MaxUint32)
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defer cleanup()
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cc, err := Dial("passthrough:///foo.bar.com", WithBalancer(RoundRobin(resolver)), WithInsecure())
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if err != nil {
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t.Fatalf("Dial(\"foo.bar.com\", WithBalancer(_)) = _, %v, want _ <nil>", err)
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}
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defer cc.Close()
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wantState := connectivity.Ready
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if state, ok := assertState(wantState, cc); !ok {
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t.Fatalf("asserState(%s) = %s, false, want %s, true", wantState, state, wantState)
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}
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// Send an update to delete the server connection (tearDown addrConn).
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update := []*naming.Update{
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{
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Op: naming.Delete,
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Addr: "localhost:" + servers[0].port,
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},
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}
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resolver.w.inject(update)
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wantState = connectivity.TransientFailure
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if state, ok := assertState(wantState, cc); !ok {
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t.Fatalf("asserState(%s) = %s, false, want %s, true", wantState, state, wantState)
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}
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update[0] = &naming.Update{
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Op: naming.Add,
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Addr: "localhost:" + servers[1].port,
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}
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resolver.w.inject(update)
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wantState = connectivity.Ready
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if state, ok := assertState(wantState, cc); !ok {
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t.Fatalf("asserState(%s) = %s, false, want %s, true", wantState, state, wantState)
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}
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}
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func TestDialTimeout(t *testing.T) {
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defer leakcheck.Check(t)
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conn, err := Dial("passthrough:///Non-Existent.Server:80", WithTimeout(time.Millisecond), WithBlock(), WithInsecure())
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if err == nil {
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conn.Close()
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}
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if err != context.DeadlineExceeded {
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t.Fatalf("Dial(_, _) = %v, %v, want %v", conn, err, context.DeadlineExceeded)
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}
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}
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func TestTLSDialTimeout(t *testing.T) {
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defer leakcheck.Check(t)
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creds, err := credentials.NewClientTLSFromFile(testdata.Path("ca.pem"), "x.test.youtube.com")
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if err != nil {
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t.Fatalf("Failed to create credentials %v", err)
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}
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conn, err := Dial("passthrough:///Non-Existent.Server:80", WithTransportCredentials(creds), WithTimeout(time.Millisecond), WithBlock())
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if err == nil {
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conn.Close()
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}
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if err != context.DeadlineExceeded {
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t.Fatalf("Dial(_, _) = %v, %v, want %v", conn, err, context.DeadlineExceeded)
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}
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}
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func TestDefaultAuthority(t *testing.T) {
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defer leakcheck.Check(t)
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target := "Non-Existent.Server:8080"
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conn, err := Dial(target, WithInsecure())
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if err != nil {
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t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
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}
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defer conn.Close()
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if conn.authority != target {
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t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, target)
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}
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}
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func TestTLSServerNameOverwrite(t *testing.T) {
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defer leakcheck.Check(t)
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overwriteServerName := "over.write.server.name"
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creds, err := credentials.NewClientTLSFromFile(testdata.Path("ca.pem"), overwriteServerName)
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if err != nil {
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t.Fatalf("Failed to create credentials %v", err)
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}
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conn, err := Dial("passthrough:///Non-Existent.Server:80", WithTransportCredentials(creds))
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if err != nil {
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t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
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}
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defer conn.Close()
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if conn.authority != overwriteServerName {
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t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
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}
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}
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func TestWithAuthority(t *testing.T) {
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defer leakcheck.Check(t)
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overwriteServerName := "over.write.server.name"
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conn, err := Dial("passthrough:///Non-Existent.Server:80", WithInsecure(), WithAuthority(overwriteServerName))
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if err != nil {
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t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
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}
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defer conn.Close()
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if conn.authority != overwriteServerName {
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t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
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}
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}
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func TestWithAuthorityAndTLS(t *testing.T) {
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defer leakcheck.Check(t)
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overwriteServerName := "over.write.server.name"
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creds, err := credentials.NewClientTLSFromFile(testdata.Path("ca.pem"), overwriteServerName)
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if err != nil {
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t.Fatalf("Failed to create credentials %v", err)
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}
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conn, err := Dial("passthrough:///Non-Existent.Server:80", WithTransportCredentials(creds), WithAuthority("no.effect.authority"))
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if err != nil {
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t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
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}
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defer conn.Close()
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if conn.authority != overwriteServerName {
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t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
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}
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}
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func TestDialContextCancel(t *testing.T) {
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defer leakcheck.Check(t)
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ctx, cancel := context.WithCancel(context.Background())
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cancel()
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if _, err := DialContext(ctx, "Non-Existent.Server:80", WithBlock(), WithInsecure()); err != context.Canceled {
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t.Fatalf("DialContext(%v, _) = _, %v, want _, %v", ctx, err, context.Canceled)
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}
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}
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// blockingBalancer mimics the behavior of balancers whose initialization takes a long time.
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// In this test, reading from blockingBalancer.Notify() blocks forever.
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type blockingBalancer struct {
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ch chan []Address
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}
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func newBlockingBalancer() Balancer {
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return &blockingBalancer{ch: make(chan []Address)}
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}
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func (b *blockingBalancer) Start(target string, config BalancerConfig) error {
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return nil
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}
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func (b *blockingBalancer) Up(addr Address) func(error) {
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return nil
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}
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func (b *blockingBalancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
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return Address{}, nil, nil
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}
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func (b *blockingBalancer) Notify() <-chan []Address {
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return b.ch
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}
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func (b *blockingBalancer) Close() error {
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close(b.ch)
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return nil
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}
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func TestDialWithBlockingBalancer(t *testing.T) {
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defer leakcheck.Check(t)
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ctx, cancel := context.WithCancel(context.Background())
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dialDone := make(chan struct{})
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go func() {
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DialContext(ctx, "Non-Existent.Server:80", WithBlock(), WithInsecure(), WithBalancer(newBlockingBalancer()))
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close(dialDone)
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}()
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cancel()
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<-dialDone
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}
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// securePerRPCCredentials always requires transport security.
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type securePerRPCCredentials struct{}
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func (c securePerRPCCredentials) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
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return nil, nil
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}
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func (c securePerRPCCredentials) RequireTransportSecurity() bool {
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return true
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}
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func TestCredentialsMisuse(t *testing.T) {
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defer leakcheck.Check(t)
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tlsCreds, err := credentials.NewClientTLSFromFile(testdata.Path("ca.pem"), "x.test.youtube.com")
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if err != nil {
|
|
t.Fatalf("Failed to create authenticator %v", err)
|
|
}
|
|
// Two conflicting credential configurations
|
|
if _, err := Dial("passthrough:///Non-Existent.Server:80", WithTransportCredentials(tlsCreds), WithBlock(), WithInsecure()); err != errCredentialsConflict {
|
|
t.Fatalf("Dial(_, _) = _, %v, want _, %v", err, errCredentialsConflict)
|
|
}
|
|
// security info on insecure connection
|
|
if _, err := Dial("passthrough:///Non-Existent.Server:80", WithPerRPCCredentials(securePerRPCCredentials{}), WithBlock(), WithInsecure()); err != errTransportCredentialsMissing {
|
|
t.Fatalf("Dial(_, _) = _, %v, want _, %v", err, errTransportCredentialsMissing)
|
|
}
|
|
}
|
|
|
|
func TestWithBackoffConfigDefault(t *testing.T) {
|
|
defer leakcheck.Check(t)
|
|
testBackoffConfigSet(t, &DefaultBackoffConfig)
|
|
}
|
|
|
|
func TestWithBackoffConfig(t *testing.T) {
|
|
defer leakcheck.Check(t)
|
|
b := BackoffConfig{MaxDelay: DefaultBackoffConfig.MaxDelay / 2}
|
|
expected := b
|
|
setDefaults(&expected) // defaults should be set
|
|
testBackoffConfigSet(t, &expected, WithBackoffConfig(b))
|
|
}
|
|
|
|
func TestWithBackoffMaxDelay(t *testing.T) {
|
|
defer leakcheck.Check(t)
|
|
md := DefaultBackoffConfig.MaxDelay / 2
|
|
expected := BackoffConfig{MaxDelay: md}
|
|
setDefaults(&expected)
|
|
testBackoffConfigSet(t, &expected, WithBackoffMaxDelay(md))
|
|
}
|
|
|
|
func testBackoffConfigSet(t *testing.T, expected *BackoffConfig, opts ...DialOption) {
|
|
opts = append(opts, WithInsecure())
|
|
conn, err := Dial("passthrough:///foo:80", opts...)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error dialing connection: %v", err)
|
|
}
|
|
defer conn.Close()
|
|
|
|
if conn.dopts.bs == nil {
|
|
t.Fatalf("backoff config not set")
|
|
}
|
|
|
|
actual, ok := conn.dopts.bs.(BackoffConfig)
|
|
if !ok {
|
|
t.Fatalf("unexpected type of backoff config: %#v", conn.dopts.bs)
|
|
}
|
|
|
|
if actual != *expected {
|
|
t.Fatalf("unexpected backoff config on connection: %v, want %v", actual, expected)
|
|
}
|
|
}
|
|
|
|
// emptyBalancer returns an empty set of servers.
|
|
type emptyBalancer struct {
|
|
ch chan []Address
|
|
}
|
|
|
|
func newEmptyBalancer() Balancer {
|
|
return &emptyBalancer{ch: make(chan []Address, 1)}
|
|
}
|
|
func (b *emptyBalancer) Start(_ string, _ BalancerConfig) error {
|
|
b.ch <- nil
|
|
return nil
|
|
}
|
|
func (b *emptyBalancer) Up(_ Address) func(error) {
|
|
return nil
|
|
}
|
|
func (b *emptyBalancer) Get(_ context.Context, _ BalancerGetOptions) (Address, func(), error) {
|
|
return Address{}, nil, nil
|
|
}
|
|
func (b *emptyBalancer) Notify() <-chan []Address {
|
|
return b.ch
|
|
}
|
|
func (b *emptyBalancer) Close() error {
|
|
close(b.ch)
|
|
return nil
|
|
}
|
|
|
|
func TestNonblockingDialWithEmptyBalancer(t *testing.T) {
|
|
defer leakcheck.Check(t)
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
dialDone := make(chan error)
|
|
go func() {
|
|
dialDone <- func() error {
|
|
conn, err := DialContext(ctx, "Non-Existent.Server:80", WithInsecure(), WithBalancer(newEmptyBalancer()))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return conn.Close()
|
|
}()
|
|
}()
|
|
if err := <-dialDone; err != nil {
|
|
t.Fatalf("unexpected error dialing connection: %s", err)
|
|
}
|
|
}
|
|
|
|
func TestClientUpdatesParamsAfterGoAway(t *testing.T) {
|
|
defer leakcheck.Check(t)
|
|
lis, err := net.Listen("tcp", "localhost:0")
|
|
if err != nil {
|
|
t.Fatalf("Failed to listen. Err: %v", err)
|
|
}
|
|
defer lis.Close()
|
|
addr := lis.Addr().String()
|
|
s := NewServer()
|
|
go s.Serve(lis)
|
|
defer s.Stop()
|
|
cc, err := Dial(addr, WithBlock(), WithInsecure(), WithKeepaliveParams(keepalive.ClientParameters{
|
|
Time: 50 * time.Millisecond,
|
|
Timeout: 100 * time.Millisecond,
|
|
PermitWithoutStream: true,
|
|
}))
|
|
if err != nil {
|
|
t.Fatalf("Dial(%s, _) = _, %v, want _, <nil>", addr, err)
|
|
}
|
|
defer cc.Close()
|
|
time.Sleep(1 * time.Second)
|
|
cc.mu.RLock()
|
|
defer cc.mu.RUnlock()
|
|
v := cc.mkp.Time
|
|
if v < 100*time.Millisecond {
|
|
t.Fatalf("cc.dopts.copts.Keepalive.Time = %v , want 100ms", v)
|
|
}
|
|
}
|