Bumping k8s dependencies to 1.13
This commit is contained in:
Cheng Xing
515
vendor/google.golang.org/grpc/clientconn_state_transition_test.go
generated
vendored
Normal file
515
vendor/google.golang.org/grpc/clientconn_state_transition_test.go
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vendored
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@@ -0,0 +1,515 @@
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/*
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*
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* Copyright 2018 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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"net"
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"sync"
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"sync/atomic"
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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/balancer"
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"google.golang.org/grpc/connectivity"
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"google.golang.org/grpc/internal/leakcheck"
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"google.golang.org/grpc/internal/testutils"
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"google.golang.org/grpc/resolver"
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"google.golang.org/grpc/resolver/manual"
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)
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const stateRecordingBalancerName = "state_recoding_balancer"
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var testBalancer = &stateRecordingBalancer{}
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func init() {
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balancer.Register(testBalancer)
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}
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// These tests use a pipeListener. This listener is similar to net.Listener except that it is unbuffered, so each read
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// and write will wait for the other side's corresponding write or read.
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func TestStateTransitions_SingleAddress(t *testing.T) {
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defer leakcheck.Check(t)
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mctBkp := getMinConnectTimeout()
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defer func() {
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atomic.StoreInt64((*int64)(&mutableMinConnectTimeout), int64(mctBkp))
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}()
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atomic.StoreInt64((*int64)(&mutableMinConnectTimeout), int64(time.Millisecond)*100)
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for _, test := range []struct {
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desc string
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want []connectivity.State
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server func(net.Listener) net.Conn
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}{
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{
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desc: "When the server returns server preface, the client enters READY.",
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want: []connectivity.State{
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connectivity.Connecting,
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connectivity.Ready,
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},
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server: func(lis net.Listener) net.Conn {
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conn, err := lis.Accept()
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if err != nil {
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t.Error(err)
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return nil
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}
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go keepReading(conn)
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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 nil
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}
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return conn
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},
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},
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{
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desc: "When the connection is closed, the client enters TRANSIENT FAILURE.",
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want: []connectivity.State{
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connectivity.Connecting,
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connectivity.TransientFailure,
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},
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server: func(lis net.Listener) net.Conn {
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conn, err := lis.Accept()
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if err != nil {
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t.Error(err)
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return nil
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}
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conn.Close()
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return nil
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},
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},
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{
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desc: `When the server sends its connection preface, but the connection dies before the client can write its
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connection preface, the client enters TRANSIENT FAILURE.`,
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want: []connectivity.State{
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connectivity.Connecting,
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connectivity.TransientFailure,
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},
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server: func(lis net.Listener) net.Conn {
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conn, err := lis.Accept()
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if err != nil {
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t.Error(err)
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return nil
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}
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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 nil
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}
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conn.Close()
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return nil
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},
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},
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{
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desc: `When the server reads the client connection preface but does not send its connection preface, the
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client enters TRANSIENT FAILURE.`,
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want: []connectivity.State{
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connectivity.Connecting,
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connectivity.TransientFailure,
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},
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server: func(lis net.Listener) net.Conn {
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conn, err := lis.Accept()
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if err != nil {
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t.Error(err)
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return nil
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}
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go keepReading(conn)
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return conn
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},
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},
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} {
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t.Log(test.desc)
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testStateTransitionSingleAddress(t, test.want, test.server)
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}
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}
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func testStateTransitionSingleAddress(t *testing.T, want []connectivity.State, server func(net.Listener) net.Conn) {
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defer leakcheck.Check(t)
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stateNotifications := make(chan connectivity.State, len(want))
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testBalancer.ResetNotifier(stateNotifications)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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pl := testutils.NewPipeListener()
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defer pl.Close()
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// Launch the server.
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var conn net.Conn
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var connMu sync.Mutex
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go func() {
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connMu.Lock()
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conn = server(pl)
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connMu.Unlock()
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}()
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client, err := DialContext(ctx, "", WithWaitForHandshake(), WithInsecure(),
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WithBalancerName(stateRecordingBalancerName), WithDialer(pl.Dialer()), withBackoff(noBackoff{}))
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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timeout := time.After(5 * time.Second)
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for i := 0; i < len(want); i++ {
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select {
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case <-timeout:
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t.Fatalf("timed out waiting for state %d (%v) in flow %v", i, want[i], want)
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case seen := <-stateNotifications:
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if seen != want[i] {
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t.Fatalf("expected to see %v at position %d in flow %v, got %v", want[i], i, want, seen)
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}
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}
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}
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connMu.Lock()
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defer connMu.Unlock()
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if conn != nil {
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err = conn.Close()
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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// When a READY connection is closed, the client enters TRANSIENT FAILURE before CONNECTING.
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func TestStateTransition_ReadyToTransientFailure(t *testing.T) {
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defer leakcheck.Check(t)
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want := []connectivity.State{
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connectivity.Connecting,
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connectivity.Ready,
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connectivity.TransientFailure,
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connectivity.Connecting,
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}
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stateNotifications := make(chan connectivity.State, len(want))
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testBalancer.ResetNotifier(stateNotifications)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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lis, 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 lis.Close()
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sawReady := make(chan struct{})
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// Launch the server.
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go func() {
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conn, err := lis.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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go keepReading(conn)
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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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// Prevents race between onPrefaceReceipt and onClose.
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<-sawReady
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conn.Close()
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}()
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client, err := DialContext(ctx, lis.Addr().String(), WithWaitForHandshake(), WithInsecure(), WithBalancerName(stateRecordingBalancerName))
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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timeout := time.After(5 * time.Second)
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for i := 0; i < len(want); i++ {
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select {
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case <-timeout:
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t.Fatalf("timed out waiting for state %d (%v) in flow %v", i, want[i], want)
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case seen := <-stateNotifications:
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if seen == connectivity.Ready {
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close(sawReady)
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}
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if seen != want[i] {
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t.Fatalf("expected to see %v at position %d in flow %v, got %v", want[i], i, want, seen)
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}
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}
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}
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}
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// When the first connection is closed, the client enters stays in CONNECTING until it tries the second
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// address (which succeeds, and then it enters READY).
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func TestStateTransitions_TriesAllAddrsBeforeTransientFailure(t *testing.T) {
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defer leakcheck.Check(t)
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want := []connectivity.State{
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connectivity.Connecting,
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connectivity.Ready,
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}
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stateNotifications := make(chan connectivity.State, len(want))
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testBalancer.ResetNotifier(stateNotifications)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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lis1, 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 lis1.Close()
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lis2, 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 lis2.Close()
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server1Done := make(chan struct{})
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server2Done := make(chan struct{})
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// Launch server 1.
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go func() {
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conn, err := lis1.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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conn.Close()
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close(server1Done)
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}()
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// Launch server 2.
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go func() {
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conn, err := lis2.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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go keepReading(conn)
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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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close(server2Done)
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}()
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rb := manual.NewBuilderWithScheme("whatever")
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rb.InitialAddrs([]resolver.Address{
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{Addr: lis1.Addr().String()},
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{Addr: lis2.Addr().String()},
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})
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client, err := DialContext(ctx, "this-gets-overwritten", WithInsecure(), WithWaitForHandshake(), WithBalancerName(stateRecordingBalancerName), withResolverBuilder(rb))
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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timeout := time.After(5 * time.Second)
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for i := 0; i < len(want); i++ {
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select {
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case <-timeout:
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t.Fatalf("timed out waiting for state %d (%v) in flow %v", i, want[i], want)
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case seen := <-stateNotifications:
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if seen != want[i] {
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t.Fatalf("expected to see %v at position %d in flow %v, got %v", want[i], i, want, seen)
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}
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}
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}
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select {
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case <-timeout:
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t.Fatal("saw the correct state transitions, but timed out waiting for client to finish interactions with server 1")
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case <-server1Done:
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}
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select {
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case <-timeout:
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t.Fatal("saw the correct state transitions, but timed out waiting for client to finish interactions with server 2")
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case <-server2Done:
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}
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}
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// When there are multiple addresses, and we enter READY on one of them, a later closure should cause
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// the client to enter TRANSIENT FAILURE before it re-enters CONNECTING.
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func TestStateTransitions_MultipleAddrsEntersReady(t *testing.T) {
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defer leakcheck.Check(t)
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want := []connectivity.State{
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connectivity.Connecting,
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connectivity.Ready,
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connectivity.TransientFailure,
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connectivity.Connecting,
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}
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stateNotifications := make(chan connectivity.State, len(want))
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testBalancer.ResetNotifier(stateNotifications)
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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lis1, 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 lis1.Close()
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// Never actually gets used; we just want it to be alive so that the resolver has two addresses to target.
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lis2, 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 lis2.Close()
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server1Done := make(chan struct{})
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sawReady := make(chan struct{})
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// Launch server 1.
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go func() {
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conn, err := lis1.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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go keepReading(conn)
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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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<-sawReady
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conn.Close()
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_, err = lis1.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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close(server1Done)
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}()
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rb := manual.NewBuilderWithScheme("whatever")
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rb.InitialAddrs([]resolver.Address{
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{Addr: lis1.Addr().String()},
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{Addr: lis2.Addr().String()},
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})
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client, err := DialContext(ctx, "this-gets-overwritten", WithInsecure(), WithWaitForHandshake(), WithBalancerName(stateRecordingBalancerName), withResolverBuilder(rb))
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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timeout := time.After(2 * time.Second)
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for i := 0; i < len(want); i++ {
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select {
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case <-timeout:
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t.Fatalf("timed out waiting for state %d (%v) in flow %v", i, want[i], want)
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case seen := <-stateNotifications:
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if seen == connectivity.Ready {
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close(sawReady)
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}
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if seen != want[i] {
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t.Fatalf("expected to see %v at position %d in flow %v, got %v", want[i], i, want, seen)
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}
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}
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}
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select {
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case <-timeout:
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t.Fatal("saw the correct state transitions, but timed out waiting for client to finish interactions with server 1")
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case <-server1Done:
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}
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}
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type stateRecordingBalancer struct {
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mu sync.Mutex
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notifier chan<- connectivity.State
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balancer.Balancer
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}
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func (b *stateRecordingBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
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b.mu.Lock()
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b.notifier <- s
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b.mu.Unlock()
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b.Balancer.HandleSubConnStateChange(sc, s)
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}
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func (b *stateRecordingBalancer) ResetNotifier(r chan<- connectivity.State) {
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b.mu.Lock()
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defer b.mu.Unlock()
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b.notifier = r
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}
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func (b *stateRecordingBalancer) Close() {
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b.mu.Lock()
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u := b.Balancer
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b.mu.Unlock()
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u.Close()
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}
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func (b *stateRecordingBalancer) Name() string {
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return stateRecordingBalancerName
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}
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func (b *stateRecordingBalancer) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
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b.mu.Lock()
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b.Balancer = balancer.Get(PickFirstBalancerName).Build(cc, opts)
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b.mu.Unlock()
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return b
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}
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type noBackoff struct{}
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func (b noBackoff) Backoff(int) time.Duration { return time.Duration(0) }
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|
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// Keep reading until something causes the connection to die (EOF, server closed, etc). Useful
|
||||
// as a tool for mindlessly keeping the connection healthy, since the client will error if
|
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// things like client prefaces are not accepted in a timely fashion.
|
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func keepReading(conn net.Conn) {
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buf := make([]byte, 1024)
|
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for _, err := conn.Read(buf); err == nil; _, err = conn.Read(buf) {
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user