// TestV3LeaseExists creates a lease on a random client, then sends a keepalive on another
// client to confirm it's visible to the whole cluster.
func TestV3LeaseExists(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
// create lease
ctx0, cancel0 := context.WithCancel(context.Background())
defer cancel0()
lresp, err := clus.RandClient().Lease.LeaseCreate(
ctx0,
&pb.LeaseCreateRequest{TTL: 30})
if err != nil {
t.Fatal(err)
}
if lresp.Error != "" {
t.Fatal(lresp.Error)
}
// confirm keepalive
ctx1, cancel1 := context.WithCancel(context.Background())
defer cancel1()
lac, err := clus.RandClient().Lease.LeaseKeepAlive(ctx1)
if err != nil {
t.Fatal(err)
}
defer lac.CloseSend()
if err = lac.Send(&pb.LeaseKeepAliveRequest{ID: lresp.ID}); err != nil {
t.Fatal(err)
}
if _, err = lac.Recv(); err != nil {
t.Fatal(err)
}
}
func newWatcher(c *EtcdClient, key string, rev int64, isPrefix bool) (*Watcher, error) {
ctx, cancel := context.WithCancel(context.Background())
w, err := c.Watch.Watch(ctx)
if err != nil {
return nil, err
}
req := &pb.WatchCreateRequest{StartRevision: rev}
if isPrefix {
req.Prefix = []byte(key)
} else {
req.Key = []byte(key)
}
if err := w.Send(&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{CreateRequest: req}}); err != nil {
return nil, err
}
wresp, err := w.Recv()
if err != nil {
return nil, err
}
if len(wresp.Events) != 0 || wresp.Created != true {
return nil, ErrWaitMismatch
}
ret := &Watcher{
wstream: w,
cancel: cancel,
donec: make(chan struct{}),
id: storage.WatchID(wresp.WatchId),
recvc: make(chan *storagepb.Event),
}
go ret.recvLoop()
return ret, nil
}
func TestNodeAdvance(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
storage := NewMemoryStorage()
c := &Config{
ID: 1,
ElectionTick: 10,
HeartbeatTick: 1,
Storage: storage,
MaxSizePerMsg: noLimit,
MaxInflightMsgs: 256,
}
n := StartNode(c, []Peer{{ID: 1}})
n.Campaign(ctx)
<-n.Ready()
n.Propose(ctx, []byte("foo"))
var rd Ready
select {
case rd = <-n.Ready():
t.Fatalf("unexpected Ready before Advance: %+v", rd)
case <-time.After(time.Millisecond):
}
storage.Append(rd.Entries)
n.Advance()
select {
case <-n.Ready():
case <-time.After(100 * time.Millisecond):
t.Errorf("expect Ready after Advance, but there is no Ready available")
}
}
func testWatchCancelRunning(t *testing.T, wctx *watchctx) {
ctx, cancel := context.WithCancel(context.Background())
if wctx.ch = wctx.w.Watch(ctx, "a"); wctx.ch == nil {
t.Fatalf("expected non-nil watcher channel")
}
if _, err := wctx.kv.Put(ctx, "a", "a"); err != nil {
t.Fatal(err)
}
cancel()
select {
case <-time.After(time.Second):
t.Fatalf("took too long to cancel")
case v, ok := <-wctx.ch:
if !ok {
// closed before getting put; OK
break
}
// got the PUT; should close next
select {
case <-time.After(time.Second):
t.Fatalf("took too long to close")
case v, ok = <-wctx.ch:
if ok {
t.Fatalf("expected watcher channel to close, got %v", v)
}
}
}
}
func TestSimpleHTTPClientDoCancelContextWaitForRoundTrip(t *testing.T) {
tr := newFakeTransport()
c := &simpleHTTPClient{transport: tr}
donechan := make(chan struct{})
ctx, cancel := context.WithCancel(context.Background())
go func() {
c.Do(ctx, &fakeAction{})
close(donechan)
}()
// This should call CancelRequest and begin the cancellation process
cancel()
select {
case <-donechan:
t.Fatalf("simpleHTTPClient.Do should not have exited yet")
default:
}
tr.finishCancel <- struct{}{}
select {
case <-donechan:
//expected behavior
return
case <-time.After(time.Second):
t.Fatalf("simpleHTTPClient.Do did not exit within 1s")
}
}
func TestSimpleHTTPClientDoCancelContextResponseBodyClosed(t *testing.T) {
tr := newFakeTransport()
c := &simpleHTTPClient{transport: tr}
// create an already-cancelled context
ctx, cancel := context.WithCancel(context.Background())
cancel()
body := &checkableReadCloser{ReadCloser: ioutil.NopCloser(strings.NewReader("foo"))}
go func() {
// wait that simpleHTTPClient knows the context is already timed out,
// and calls CancelRequest
testutil.WaitSchedule()
// response is returned before cancel effects
tr.respchan <- &http.Response{Body: body}
}()
_, _, err := c.Do(ctx, &fakeAction{})
if err == nil {
t.Fatalf("expected non-nil error, got nil")
}
if !body.closed {
t.Fatalf("expected closed body")
}
}
func newClient(cfg *Config) (*Client, error) {
if cfg == nil {
cfg = &Config{RetryDialer: dialEndpointList}
}
var creds *credentials.TransportAuthenticator
if cfg.TLS != nil {
c := credentials.NewTLS(cfg.TLS)
creds = &c
}
// use a temporary skeleton client to bootstrap first connection
ctx, cancel := context.WithCancel(context.TODO())
conn, err := cfg.RetryDialer(&Client{cfg: *cfg, creds: creds, ctx: ctx})
if err != nil {
return nil, err
}
client := &Client{
conn: conn,
cfg: *cfg,
creds: creds,
ctx: ctx,
cancel: cancel,
}
client.Cluster = NewCluster(client)
client.KV = NewKV(client)
client.Lease = NewLease(client)
client.Watcher = NewWatcher(client)
client.Auth = NewAuth(client)
client.Maintenance = &maintenance{c: client}
return client, nil
}
// DoCancelAfterFirstResponse cancels the RPC after receiving the first message from the server.
func DoCancelAfterFirstResponse(tc testpb.TestServiceClient) {
ctx, cancel := context.WithCancel(context.Background())
stream, err := tc.FullDuplexCall(ctx)
if err != nil {
grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
}
respParam := []*testpb.ResponseParameters{
{
Size: proto.Int32(31415),
},
}
pl := clientNewPayload(testpb.PayloadType_COMPRESSABLE, 27182)
req := &testpb.StreamingOutputCallRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseParameters: respParam,
Payload: pl,
}
if err := stream.Send(req); err != nil {
grpclog.Fatalf("%v.Send(%v) = %v", stream, req, err)
}
if _, err := stream.Recv(); err != nil {
grpclog.Fatalf("%v.Recv() = %v", stream, err)
}
cancel()
if _, err := stream.Recv(); grpc.Code(err) != codes.Canceled {
grpclog.Fatalf("%v compleled with error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
}
grpclog.Println("CancelAfterFirstResponse done")
}
// Register register service
// to configured etcd instance.
// Once the Register is called, the client
// also periodically
// calls the refresh goroutine.
func (e *EtcdReigistryClient) Register() {
e.etcdKey = buildKey(e.ServiceName, e.InstanceName)
value := registerDTO{
e.BaseURL,
}
val, _ := json.Marshal(value)
e.keepAliveTicker = time.NewTicker(KeepAlivePeriod)
ctx, c := context.WithCancel(context.TODO())
e.cancel = c
insertFunc := func() {
e.etcdKApi.Set(context.Background(), e.etcdKey, string(val), &client.SetOptions{
TTL: TTL,
})
}
insertFunc()
// Exec the keep alive goroutine
go func() {
for {
select {
case <-e.keepAliveTicker.C:
insertFunc()
log.Printf("Keep alive routine for %s", e.ServiceName)
case <-ctx.Done():
log.Printf("Shutdown keep alive routine for %s", e.ServiceName)
return
}
}
}()
}
// TestV3LeaseKeepAlive ensures keepalive keeps the lease alive.
func TestV3LeaseKeepAlive(t *testing.T) {
defer testutil.AfterTest(t)
testLeaseRemoveLeasedKey(t, func(clus *ClusterV3, leaseID int64) error {
lc := toGRPC(clus.RandClient()).Lease
lreq := &pb.LeaseKeepAliveRequest{ID: leaseID}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
lac, err := lc.LeaseKeepAlive(ctx)
if err != nil {
return err
}
defer lac.CloseSend()
// renew long enough so lease would've expired otherwise
for i := 0; i < 3; i++ {
if err = lac.Send(lreq); err != nil {
return err
}
lresp, rxerr := lac.Recv()
if rxerr != nil {
return rxerr
}
if lresp.ID != leaseID {
return fmt.Errorf("expected lease ID %v, got %v", leaseID, lresp.ID)
}
time.Sleep(time.Duration(lresp.TTL/2) * time.Second)
}
_, err = lc.LeaseRevoke(context.TODO(), &pb.LeaseRevokeRequest{ID: leaseID})
return err
})
}
func BenchmarkOneNode(b *testing.B) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
n := newNode()
s := NewMemoryStorage()
r := newTestRaft(1, []uint64{1}, 10, 1, s)
go n.run(r)
defer n.Stop()
n.Campaign(ctx)
go func() {
for i := 0; i < b.N; i++ {
n.Propose(ctx, []byte("foo"))
}
}()
for {
rd := <-n.Ready()
s.Append(rd.Entries)
// a reasonable disk sync latency
time.Sleep(1 * time.Millisecond)
n.Advance()
if rd.HardState.Commit == uint64(b.N+1) {
return
}
}
}
func observe(c *clientv3.Client, election string) error {
e := concurrency.NewElection(context.TODO(), c, election)
ctx, cancel := context.WithCancel(context.TODO())
donec := make(chan struct{})
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, os.Interrupt, os.Kill)
go func() {
<-sigc
cancel()
}()
go func() {
for resp := range e.Observe(ctx) {
display.Get(resp)
}
close(donec)
}()
<-donec
select {
case <-ctx.Done():
default:
return errors.New("elect: observer lost")
}
return nil
}
func testCancel(t *testing.T, e env) {
s, addr := serverSetUp(t, nil, math.MaxUint32, nil, nil, e)
cc := clientSetUp(t, addr, nil, nil, "", e)
tc := testpb.NewTestServiceClient(cc)
defer tearDown(s, cc)
argSize := 2718
respSize := 314
payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(argSize))
if err != nil {
t.Fatal(err)
}
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(respSize)),
Payload: payload,
}
ctx, cancel := context.WithCancel(context.Background())
time.AfterFunc(1*time.Millisecond, cancel)
reply, err := tc.UnaryCall(ctx, req)
if grpc.Code(err) != codes.Canceled {
t.Fatalf(`TestService/UnaryCall(_, _) = %v, %v; want <nil>, error code: %d`, reply, err, codes.Canceled)
}
}
func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
fc := &inFlow{
limit: initialWindowSize,
conn: t.fc,
}
// TODO(zhaoq): Handle uint32 overflow of Stream.id.
s := &Stream{
id: t.nextID,
method: callHdr.Method,
buf: newRecvBuffer(),
fc: fc,
sendQuotaPool: newQuotaPool(int(t.streamSendQuota)),
headerChan: make(chan struct{}),
}
t.nextID += 2
s.windowHandler = func(n int) {
t.updateWindow(s, uint32(n))
}
// Make a stream be able to cancel the pending operations by itself.
s.ctx, s.cancel = context.WithCancel(ctx)
s.dec = &recvBufferReader{
ctx: s.ctx,
recv: s.buf,
}
return s
}
// TestV3LeaseSwitch tests a key can be switched from one lease to another.
func TestV3LeaseSwitch(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
key := "foo"
// create lease
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
lresp1, err1 := toGRPC(clus.RandClient()).Lease.LeaseCreate(ctx, &pb.LeaseCreateRequest{TTL: 30})
if err1 != nil {
t.Fatal(err1)
}
lresp2, err2 := toGRPC(clus.RandClient()).Lease.LeaseCreate(ctx, &pb.LeaseCreateRequest{TTL: 30})
if err2 != nil {
t.Fatal(err2)
}
// attach key on lease1 then switch it to lease2
put1 := &pb.PutRequest{Key: []byte(key), Lease: lresp1.ID}
_, err := toGRPC(clus.RandClient()).KV.Put(ctx, put1)
if err != nil {
t.Fatal(err)
}
put2 := &pb.PutRequest{Key: []byte(key), Lease: lresp2.ID}
_, err = toGRPC(clus.RandClient()).KV.Put(ctx, put2)
if err != nil {
t.Fatal(err)
}
// revoke lease1 should not remove key
_, err = toGRPC(clus.RandClient()).Lease.LeaseRevoke(ctx, &pb.LeaseRevokeRequest{ID: lresp1.ID})
if err != nil {
t.Fatal(err)
}
rreq := &pb.RangeRequest{Key: []byte("foo")}
rresp, err := toGRPC(clus.RandClient()).KV.Range(context.TODO(), rreq)
if err != nil {
t.Fatal(err)
}
if len(rresp.Kvs) != 1 {
t.Fatalf("unexpect removal of key")
}
// revoke lease2 should remove key
_, err = toGRPC(clus.RandClient()).Lease.LeaseRevoke(ctx, &pb.LeaseRevokeRequest{ID: lresp2.ID})
if err != nil {
t.Fatal(err)
}
rresp, err = toGRPC(clus.RandClient()).KV.Range(context.TODO(), rreq)
if err != nil {
t.Fatal(err)
}
if len(rresp.Kvs) != 0 {
t.Fatalf("lease removed but key remains")
}
}
func (e *Election) observe(ctx context.Context, ch chan<- v3.GetResponse) {
defer close(ch)
for {
resp, err := e.client.Get(ctx, e.keyPrefix, v3.WithFirstCreate()...)
if err != nil {
return
}
var kv *storagepb.KeyValue
cctx, cancel := context.WithCancel(ctx)
if len(resp.Kvs) == 0 {
// wait for first key put on prefix
opts := []v3.OpOption{v3.WithRev(resp.Header.Revision), v3.WithPrefix()}
wch := e.client.Watch(cctx, e.keyPrefix, opts...)
for kv == nil {
wr, ok := <-wch
if !ok || wr.Err() != nil {
cancel()
return
}
// only accept PUTs; a DELETE will make observe() spin
for _, ev := range wr.Events {
if ev.Type == storagepb.PUT {
kv = ev.Kv
break
}
}
}
} else {
kv = resp.Kvs[0]
}
wch := e.client.Watch(cctx, string(kv.Key), v3.WithRev(kv.ModRevision))
keyDeleted := false
for !keyDeleted {
wr, ok := <-wch
if !ok {
return
}
for _, ev := range wr.Events {
if ev.Type == storagepb.DELETE {
keyDeleted = true
break
}
resp.Header = &wr.Header
resp.Kvs = []*storagepb.KeyValue{ev.Kv}
select {
case ch <- *resp:
case <-cctx.Done():
return
}
}
}
cancel()
}
}
func (le *LeaderElector) Start() <-chan ElectionResponse {
var waitIndex uint64 = 0
out := make(chan ElectionResponse, 2)
await := make(chan bool, 2)
renew := make(chan bool, 2)
le.ctx, le.cancel = context.WithCancel(context.Background())
if le.ctx == nil || le.cancel == nil {
out <- ElectionResponse{
err: errors.New("Couldn't instantiate context/cancel objects"),
}
close(out)
return out
}
go func() {
for {
select {
case <-le.ctx.Done():
le.obsvr.Stop()
close(out)
return
case <-await:
resp, err := le.waitForLeadership(waitIndex)
if err != nil {
time.Sleep(LE_SLEEP_INTERVAL)
} else if resp != nil {
waitIndex = resp.Node.ModifiedIndex
}
case <-renew:
errChan := le.ec.RenewTTL(le.ctx, le.keyPath, le.value, TTL_VAL, TTL_REFRESH_TIMEOUT)
for e := range errChan {
out <- ElectionResponse{err: e}
time.Sleep(LE_SLEEP_INTERVAL)
break
}
default:
_, err := le.acquireLeadership()
if err != nil {
errObj, ok := err.(client.Error)
if ok == true && errObj.Code == client.ErrorCodeNodeExist {
await <- true
} else {
time.Sleep(LE_SLEEP_INTERVAL)
}
} else {
renew <- true
out <- ElectionResponse{err: nil}
}
}
}
}()
return out
}
// TestElectionFailover tests that an election will
func TestElectionFailover(t *testing.T) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
defer dropSessionLease(clus)
cctx, cancel := context.WithCancel(context.TODO())
defer cancel()
// first leader (elected)
e := concurrency.NewElection(clus.clients[0], "test-election")
if err := e.Campaign(context.TODO(), "foo"); err != nil {
t.Fatalf("failed volunteer (%v)", err)
}
// check first leader
resp, ok := <-e.Observe(cctx)
if !ok {
t.Fatalf("could not wait for first election; channel closed")
}
s := string(resp.Kvs[0].Value)
if s != "foo" {
t.Fatalf("wrong election result. got %s, wanted foo", s)
}
// next leader
electedc := make(chan struct{})
go func() {
ee := concurrency.NewElection(clus.clients[1], "test-election")
if eer := ee.Campaign(context.TODO(), "bar"); eer != nil {
t.Fatal(eer)
}
electedc <- struct{}{}
}()
// invoke leader failover
session, serr := concurrency.NewSession(clus.clients[0])
if serr != nil {
t.Fatal(serr)
}
if err := session.Close(); err != nil {
t.Fatal(err)
}
// check new leader
e = concurrency.NewElection(clus.clients[2], "test-election")
resp, ok = <-e.Observe(cctx)
if !ok {
t.Fatalf("could not wait for second election; channel closed")
}
s = string(resp.Kvs[0].Value)
if s != "bar" {
t.Fatalf("wrong election result. got %s, wanted bar", s)
}
// leader must ack election (otherwise, Campaign may see closed conn)
<-electedc
}
func waitUpdate(ctx context.Context, client *v3.Client, key string, opts ...v3.OpOption) error {
cctx, cancel := context.WithCancel(ctx)
defer cancel()
wresp, ok := <-client.Watch(cctx, key, opts...)
if !ok {
return ctx.Err()
}
return wresp.Err()
}
// NewFIFOScheduler returns a Scheduler that schedules jobs in FIFO
// order sequentially
func NewFIFOScheduler() Scheduler {
f := &fifo{
resume: make(chan struct{}, 1),
donec: make(chan struct{}, 1),
}
f.finishCond = sync.NewCond(&f.mu)
f.ctx, f.cancel = context.WithCancel(context.Background())
go f.run()
return f
}
// TestMultiNodeStart ensures that a node can be started correctly. The node should
// start with correct configuration change entries, and can accept and commit
// proposals.
func TestMultiNodeStart(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
cc := raftpb.ConfChange{Type: raftpb.ConfChangeAddNode, NodeID: 1}
ccdata, err := cc.Marshal()
if err != nil {
t.Fatalf("unexpected marshal error: %v", err)
}
wants := []Ready{
{
SoftState: &SoftState{Lead: 1, RaftState: StateLeader},
HardState: raftpb.HardState{Term: 2, Commit: 2, Vote: 1},
Entries: []raftpb.Entry{
{Type: raftpb.EntryConfChange, Term: 1, Index: 1, Data: ccdata},
{Term: 2, Index: 2},
},
CommittedEntries: []raftpb.Entry{
{Type: raftpb.EntryConfChange, Term: 1, Index: 1, Data: ccdata},
{Term: 2, Index: 2},
},
},
{
HardState: raftpb.HardState{Term: 2, Commit: 3, Vote: 1},
Entries: []raftpb.Entry{{Term: 2, Index: 3, Data: []byte("foo")}},
CommittedEntries: []raftpb.Entry{{Term: 2, Index: 3, Data: []byte("foo")}},
},
}
mn := StartMultiNode(1)
storage := NewMemoryStorage()
mn.CreateGroup(1, newTestConfig(1, nil, 10, 1, storage), []Peer{{ID: 1}})
mn.Campaign(ctx, 1)
gs := <-mn.Ready()
g := gs[1]
if !reflect.DeepEqual(g, wants[0]) {
t.Fatalf("#%d: g = %+v,\n w %+v", 1, g, wants[0])
} else {
storage.Append(g.Entries)
mn.Advance(gs)
}
mn.Propose(ctx, 1, []byte("foo"))
if gs2 := <-mn.Ready(); !reflect.DeepEqual(gs2[1], wants[1]) {
t.Errorf("#%d: g = %+v,\n w %+v", 2, gs2[1], wants[1])
} else {
storage.Append(gs2[1].Entries)
mn.Advance(gs2)
}
select {
case rd := <-mn.Ready():
t.Errorf("unexpected Ready: %+v", rd)
case <-time.After(time.Millisecond):
}
}
// TestV3LeaseFailover ensures the old leader drops lease keepalive requests within
// election timeout after it loses its quorum. And the new leader extends the TTL of
// the lease to at least TTL + election timeout.
func TestV3LeaseFailover(t *testing.T) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
toIsolate := clus.waitLeader(t, clus.Members)
lc := toGRPC(clus.Client(toIsolate)).Lease
// create lease
lresp, err := lc.LeaseCreate(context.TODO(), &pb.LeaseCreateRequest{TTL: 5})
if err != nil {
t.Fatal(err)
}
if lresp.Error != "" {
t.Fatal(lresp.Error)
}
// isolate the current leader with its followers.
clus.Members[toIsolate].Pause()
lreq := &pb.LeaseKeepAliveRequest{ID: lresp.ID}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
lac, err := lc.LeaseKeepAlive(ctx)
if err != nil {
t.Fatal(err)
}
defer lac.CloseSend()
// send keep alive to old leader until the old leader starts
// to drop lease request.
var expectedExp time.Time
for {
if err = lac.Send(lreq); err != nil {
break
}
lkresp, rxerr := lac.Recv()
if rxerr != nil {
break
}
expectedExp = time.Now().Add(time.Duration(lkresp.TTL) * time.Second)
time.Sleep(time.Duration(lkresp.TTL/2) * time.Second)
}
clus.Members[toIsolate].Resume()
clus.waitLeader(t, clus.Members)
// lease should not expire at the last received expire deadline.
time.Sleep(expectedExp.Sub(time.Now()) - 500*time.Millisecond)
if !leaseExist(t, clus, lresp.ID) {
t.Error("unexpected lease not exists")
}
}
func testV3WatchCancel(t *testing.T, startRev int64) {
clus := newClusterGRPC(t, &clusterConfig{size: 3})
wAPI := pb.NewWatchClient(clus.RandConn())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
wStream, errW := wAPI.Watch(ctx)
if errW != nil {
t.Fatalf("wAPI.Watch error: %v", errW)
}
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), StartRevision: startRev}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
wresp, errR := wStream.Recv()
if errR != nil {
t.Errorf("wStream.Recv error: %v", errR)
}
if !wresp.Created {
t.Errorf("wresp.Created got = %v, want = true", wresp.Created)
}
creq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CancelRequest{
CancelRequest: &pb.WatchCancelRequest{
WatchId: wresp.WatchId}}}
if err := wStream.Send(creq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
cresp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
if !cresp.Canceled {
t.Errorf("cresp.Canceled got = %v, want = true", cresp.Canceled)
}
kvc := pb.NewKVClient(clus.RandConn())
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")}); err != nil {
t.Errorf("couldn't put key (%v)", err)
}
// watch got canceled, so this should block
rok, nr := WaitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
clus.Terminate(t)
}
func (s *stresser) Stress() error {
conn, err := grpc.Dial(s.Endpoint, grpc.WithInsecure(), grpc.WithTimeout(5*time.Second))
if err != nil {
return fmt.Errorf("%v (%s)", err, s.Endpoint)
}
defer conn.Close()
ctx, cancel := context.WithCancel(context.Background())
wg := &sync.WaitGroup{}
wg.Add(s.N)
s.mu.Lock()
s.conn = conn
s.cancel = cancel
s.wg = wg
s.mu.Unlock()
kvc := pb.NewKVClient(conn)
for i := 0; i < s.N; i++ {
go func(i int) {
defer wg.Done()
for {
// TODO: 10-second is enough timeout to cover leader failure
// and immediate leader election. Find out what other cases this
// could be timed out.
putctx, putcancel := context.WithTimeout(ctx, 10*time.Second)
_, err := kvc.Put(putctx, &pb.PutRequest{
Key: []byte(fmt.Sprintf("foo%d", rand.Intn(s.KeySuffixRange))),
Value: []byte(randStr(s.KeySize)),
})
putcancel()
if err != nil {
if grpc.ErrorDesc(err) == context.DeadlineExceeded.Error() {
// This retries when request is triggered at the same time as
// leader failure. When we terminate the leader, the request to
// that leader cannot be processed, and times out. Also requests
// to followers cannot be forwarded to the old leader, so timing out
// as well. We want to keep stressing until the cluster elects a
// new leader and start processing requests again.
continue
}
return
}
s.mu.Lock()
s.success++
s.mu.Unlock()
}
}(i)
}
<-ctx.Done()
return nil
}
func (clm *clientLeaseMgr) sessionLease(client *clientv3.Client, ttl int64) (lease.LeaseID, error) {
clm.mu.Lock()
defer clm.mu.Unlock()
if lka, ok := clm.leases[client]; ok {
return lka.id, nil
}
resp, err := client.Lease.LeaseCreate(context.TODO(), &pb.LeaseCreateRequest{TTL: ttl})
if err != nil {
return lease.NoLease, err
}
id := lease.LeaseID(resp.ID)
ctx, cancel := context.WithCancel(context.Background())
keepAlive, err := client.Lease.LeaseKeepAlive(ctx)
if err != nil || keepAlive == nil {
return lease.NoLease, err
}
lka := &leaseKeepAlive{id: id, donec: make(chan struct{})}
clm.leases[client] = lka
// keep the lease alive until clientection error
go func() {
defer func() {
keepAlive.CloseSend()
clm.mu.Lock()
delete(clm.leases, client)
clm.mu.Unlock()
cancel()
close(lka.donec)
}()
ttl := resp.TTL
for {
lreq := &pb.LeaseKeepAliveRequest{ID: int64(id)}
select {
case <-lka.donec:
return
case <-time.After(time.Duration(ttl/2) * time.Second):
}
if err := keepAlive.Send(lreq); err != nil {
break
}
resp, err := keepAlive.Recv()
if err != nil {
break
}
ttl = resp.TTL
}
}()
return id, nil
}
func (e *etcd) WatchRouteChanges(filter string) (<-chan Event, <-chan error, context.CancelFunc) {
events := make(chan Event)
errors := make(chan error)
cxt, cancel := context.WithCancel(e.ctx)
go e.dispatchWatchEvents(cxt, filter, events, errors)
time.Sleep(100 * time.Millisecond) //give the watcher a chance to connect
return events, errors, cancel
}
func testWatchCancelImmediate(t *testing.T, wctx *watchctx) {
ctx, cancel := context.WithCancel(context.Background())
cancel()
wch := wctx.w.Watch(ctx, "a")
select {
case wresp, ok := <-wch:
if ok {
t.Fatalf("read wch got %v; expected closed channel", wresp)
}
default:
t.Fatalf("closed watcher channel should not block")
}
}
func setupFakeEtcd(keys client.KeysAPI) db.DB {
nodeURLs := []string{"127.0.0.1:5000"}
cfg := client.Config{
Endpoints: nodeURLs,
Transport: client.DefaultTransport,
}
client, err := client.New(cfg)
Expect(err).NotTo(HaveOccurred())
ctx, cancel := context.WithCancel(context.Background())
return db.New(client, keys, ctx, cancel)
}
// DoCancelAfterBegin cancels the RPC after metadata has been sent but before payloads are sent.
func DoCancelAfterBegin(tc testpb.TestServiceClient) {
ctx, cancel := context.WithCancel(metadata.NewContext(context.Background(), testMetadata))
stream, err := tc.StreamingInputCall(ctx)
if err != nil {
grpclog.Fatalf("%v.StreamingInputCall(_) = _, %v", tc, err)
}
cancel()
_, err = stream.CloseAndRecv()
if grpc.Code(err) != codes.Canceled {
grpclog.Fatalf("%v.CloseAndRecv() got error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
}
grpclog.Println("CancelAfterBegin done")
}
func TestIsHalted(t *testing.T) {
if !isHalted(nil, fmt.Errorf("etcdserver: some etcdserver error")) {
t.Errorf(`error prefixed with "etcdserver: " should be Halted`)
}
ctx, cancel := context.WithCancel(context.TODO())
if isHalted(ctx, nil) {
t.Errorf("no error and active context should not be Halted")
}
cancel()
if !isHalted(ctx, nil) {
t.Errorf("cancel on context should be Halted")
}
}