478 lines
15 KiB
Go
478 lines
15 KiB
Go
|
/*
|
||
|
|
*
|
||
|
|
* Copyright 2017 gRPC authors.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
package roundrobin_test
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"net"
|
||
|
|
"sync"
|
||
|
|
"testing"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"golang.org/x/net/context"
|
||
|
|
"google.golang.org/grpc"
|
||
|
|
"google.golang.org/grpc/balancer/roundrobin"
|
||
|
|
"google.golang.org/grpc/codes"
|
||
|
|
_ "google.golang.org/grpc/grpclog/glogger"
|
||
|
|
"google.golang.org/grpc/peer"
|
||
|
|
"google.golang.org/grpc/resolver"
|
||
|
|
"google.golang.org/grpc/resolver/manual"
|
||
|
|
"google.golang.org/grpc/status"
|
||
|
|
testpb "google.golang.org/grpc/test/grpc_testing"
|
||
|
|
"google.golang.org/grpc/test/leakcheck"
|
||
|
|
)
|
||
|
|
|
||
|
|
type testServer struct {
|
||
|
|
testpb.TestServiceServer
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
|
||
|
|
return &testpb.Empty{}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
type test struct {
|
||
|
|
servers []*grpc.Server
|
||
|
|
addresses []string
|
||
|
|
}
|
||
|
|
|
||
|
|
func (t *test) cleanup() {
|
||
|
|
for _, s := range t.servers {
|
||
|
|
s.Stop()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func startTestServers(count int) (_ *test, err error) {
|
||
|
|
t := &test{}
|
||
|
|
|
||
|
|
defer func() {
|
||
|
|
if err != nil {
|
||
|
|
for _, s := range t.servers {
|
||
|
|
s.Stop()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
for i := 0; i < count; i++ {
|
||
|
|
lis, err := net.Listen("tcp", "localhost:0")
|
||
|
|
if err != nil {
|
||
|
|
return nil, fmt.Errorf("Failed to listen %v", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
s := grpc.NewServer()
|
||
|
|
testpb.RegisterTestServiceServer(s, &testServer{})
|
||
|
|
t.servers = append(t.servers, s)
|
||
|
|
t.addresses = append(t.addresses, lis.Addr().String())
|
||
|
|
|
||
|
|
go func(s *grpc.Server, l net.Listener) {
|
||
|
|
s.Serve(l)
|
||
|
|
}(s, lis)
|
||
|
|
}
|
||
|
|
|
||
|
|
return t, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestOneBackend(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
test, err := startTestServers(1)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: test.addresses[0]}})
|
||
|
|
// The second RPC should succeed.
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestBackendsRoundRobin(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
backendCount := 5
|
||
|
|
test, err := startTestServers(backendCount)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
var resolvedAddrs []resolver.Address
|
||
|
|
for i := 0; i < backendCount; i++ {
|
||
|
|
resolvedAddrs = append(resolvedAddrs, resolver.Address{Addr: test.addresses[i]})
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress(resolvedAddrs)
|
||
|
|
var p peer.Peer
|
||
|
|
// Make sure connections to all servers are up.
|
||
|
|
for si := 0; si < backendCount; si++ {
|
||
|
|
var connected bool
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() == test.addresses[si] {
|
||
|
|
connected = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !connected {
|
||
|
|
t.Fatalf("Connection to %v was not up after more than 1 second", test.addresses[si])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for i := 0; i < 3*backendCount; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() != test.addresses[i%backendCount] {
|
||
|
|
t.Fatalf("Index %d: want peer %v, got peer %v", i, test.addresses[i%backendCount], p.Addr.String())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestAddressesRemoved(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
test, err := startTestServers(1)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: test.addresses[0]}})
|
||
|
|
// The second RPC should succeed.
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{})
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false)); status.Code(err) == codes.DeadlineExceeded {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
t.Fatalf("No RPC failed after removing all addresses, want RPC to fail with DeadlineExceeded")
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestCloseWithPendingRPC(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
test, err := startTestServers(1)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
|
||
|
|
var wg sync.WaitGroup
|
||
|
|
for i := 0; i < 3; i++ {
|
||
|
|
wg.Add(1)
|
||
|
|
go func() {
|
||
|
|
defer wg.Done()
|
||
|
|
// This RPC blocks until cc is closed.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); status.Code(err) == codes.DeadlineExceeded {
|
||
|
|
t.Errorf("RPC failed because of deadline after cc is closed; want error the client connection is closing")
|
||
|
|
}
|
||
|
|
cancel()
|
||
|
|
}()
|
||
|
|
}
|
||
|
|
cc.Close()
|
||
|
|
wg.Wait()
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestNewAddressWhileBlocking(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
test, err := startTestServers(1)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: test.addresses[0]}})
|
||
|
|
// The second RPC should succeed.
|
||
|
|
ctx, cancel = context.WithTimeout(context.Background(), 2*time.Second)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, nil", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress([]resolver.Address{})
|
||
|
|
|
||
|
|
var wg sync.WaitGroup
|
||
|
|
for i := 0; i < 3; i++ {
|
||
|
|
wg.Add(1)
|
||
|
|
go func() {
|
||
|
|
defer wg.Done()
|
||
|
|
// This RPC blocks until NewAddress is called.
|
||
|
|
testc.EmptyCall(context.Background(), &testpb.Empty{})
|
||
|
|
}()
|
||
|
|
}
|
||
|
|
time.Sleep(50 * time.Millisecond)
|
||
|
|
r.NewAddress([]resolver.Address{{Addr: test.addresses[0]}})
|
||
|
|
wg.Wait()
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestOneServerDown(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
backendCount := 3
|
||
|
|
test, err := startTestServers(backendCount)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name), grpc.WithWaitForHandshake())
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
var resolvedAddrs []resolver.Address
|
||
|
|
for i := 0; i < backendCount; i++ {
|
||
|
|
resolvedAddrs = append(resolvedAddrs, resolver.Address{Addr: test.addresses[i]})
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress(resolvedAddrs)
|
||
|
|
var p peer.Peer
|
||
|
|
// Make sure connections to all servers are up.
|
||
|
|
for si := 0; si < backendCount; si++ {
|
||
|
|
var connected bool
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() == test.addresses[si] {
|
||
|
|
connected = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !connected {
|
||
|
|
t.Fatalf("Connection to %v was not up after more than 1 second", test.addresses[si])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for i := 0; i < 3*backendCount; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() != test.addresses[i%backendCount] {
|
||
|
|
t.Fatalf("Index %d: want peer %v, got peer %v", i, test.addresses[i%backendCount], p.Addr.String())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Stop one server, RPCs should roundrobin among the remaining servers.
|
||
|
|
backendCount--
|
||
|
|
test.servers[backendCount].Stop()
|
||
|
|
// Loop until see server[backendCount-1] twice without seeing server[backendCount].
|
||
|
|
var targetSeen int
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
targetSeen = 0
|
||
|
|
t.Logf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
// Due to a race, this RPC could possibly get the connection that
|
||
|
|
// was closing, and this RPC may fail. Keep trying when this
|
||
|
|
// happens.
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
switch p.Addr.String() {
|
||
|
|
case test.addresses[backendCount-1]:
|
||
|
|
targetSeen++
|
||
|
|
case test.addresses[backendCount]:
|
||
|
|
// Reset targetSeen if peer is server[backendCount].
|
||
|
|
targetSeen = 0
|
||
|
|
}
|
||
|
|
// Break to make sure the last picked address is server[-1], so the following for loop won't be flaky.
|
||
|
|
if targetSeen >= 2 {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if targetSeen != 2 {
|
||
|
|
t.Fatal("Failed to see server[backendCount-1] twice without seeing server[backendCount]")
|
||
|
|
}
|
||
|
|
for i := 0; i < 3*backendCount; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() != test.addresses[i%backendCount] {
|
||
|
|
t.Errorf("Index %d: want peer %v, got peer %v", i, test.addresses[i%backendCount], p.Addr.String())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestAllServersDown(t *testing.T) {
|
||
|
|
defer leakcheck.Check(t)
|
||
|
|
r, cleanup := manual.GenerateAndRegisterManualResolver()
|
||
|
|
defer cleanup()
|
||
|
|
|
||
|
|
backendCount := 3
|
||
|
|
test, err := startTestServers(backendCount)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to start servers: %v", err)
|
||
|
|
}
|
||
|
|
defer test.cleanup()
|
||
|
|
|
||
|
|
cc, err := grpc.Dial(r.Scheme()+":///test.server", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name), grpc.WithWaitForHandshake())
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("failed to dial: %v", err)
|
||
|
|
}
|
||
|
|
defer cc.Close()
|
||
|
|
testc := testpb.NewTestServiceClient(cc)
|
||
|
|
// The first RPC should fail because there's no address.
|
||
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
|
||
|
|
defer cancel()
|
||
|
|
if _, err := testc.EmptyCall(ctx, &testpb.Empty{}); err == nil || status.Code(err) != codes.DeadlineExceeded {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
var resolvedAddrs []resolver.Address
|
||
|
|
for i := 0; i < backendCount; i++ {
|
||
|
|
resolvedAddrs = append(resolvedAddrs, resolver.Address{Addr: test.addresses[i]})
|
||
|
|
}
|
||
|
|
|
||
|
|
r.NewAddress(resolvedAddrs)
|
||
|
|
var p peer.Peer
|
||
|
|
// Make sure connections to all servers are up.
|
||
|
|
for si := 0; si < backendCount; si++ {
|
||
|
|
var connected bool
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() == test.addresses[si] {
|
||
|
|
connected = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
if !connected {
|
||
|
|
t.Fatalf("Connection to %v was not up after more than 1 second", test.addresses[si])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for i := 0; i < 3*backendCount; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(&p)); err != nil {
|
||
|
|
t.Fatalf("EmptyCall() = _, %v, want _, <nil>", err)
|
||
|
|
}
|
||
|
|
if p.Addr.String() != test.addresses[i%backendCount] {
|
||
|
|
t.Fatalf("Index %d: want peer %v, got peer %v", i, test.addresses[i%backendCount], p.Addr.String())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// All servers are stopped, failfast RPC should fail with unavailable.
|
||
|
|
for i := 0; i < backendCount; i++ {
|
||
|
|
test.servers[i].Stop()
|
||
|
|
}
|
||
|
|
time.Sleep(100 * time.Millisecond)
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
if _, err := testc.EmptyCall(context.Background(), &testpb.Empty{}); status.Code(err) == codes.Unavailable {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
time.Sleep(time.Millisecond)
|
||
|
|
}
|
||
|
|
t.Fatalf("Failfast RPCs didn't fail with Unavailable after all servers are stopped")
|
||
|
|
}
|