Golang TestServer.RPCContext方法代碼示例

// TestRequestToUninitializedRange tests the behavior when a request
// is sent to a node which should be a replica of the correct range
// but has not yet received its initial snapshot. This would
// previously panic due to a malformed error response from the server,
// as seen in https://github.com/cockroachdb/cockroach/issues/6027.
//
// Prior to the other changes in the commit that introduced it, this
// test would reliable trigger the panic from #6027. However, it
// relies on some hacky tricks to both trigger the panic and shut down
// cleanly. If this test needs a lot of maintenance in the future we
// should be willing to get rid of it.
func TestRequestToUninitializedRange(t *testing.T) {
	defer leaktest.AfterTest(t)()
	s := server.TestServer{StoresPerNode: 2}
	if err := s.Start(); err != nil {
		t.Fatalf("Could not start server: %v", err)
	}
	defer s.Stop()

	// Choose a range ID that is much larger than any that would be
	// created by initial splits.
	const rangeID = roachpb.RangeID(1000)

	// Set up a range with replicas on two stores of the same node. This
	// ensures that the DistSender will consider both replicas healthy
	// and will try to talk to both (so we can get a non-retryable error
	// from the second store).
	replica1 := roachpb.ReplicaDescriptor{
		NodeID:    1,
		StoreID:   1,
		ReplicaID: 1,
	}
	replica2 := roachpb.ReplicaDescriptor{
		NodeID:    1,
		StoreID:   2,
		ReplicaID: 2,
	}

	// HACK: remove the second store from the node to generate a
	// non-retryable error when we try to talk to it.
	store2, err := s.Stores().GetStore(2)
	if err != nil {
		t.Fatal(err)
	}
	s.Stores().RemoveStore(store2)

	// Create the uninitialized range by sending an isolated raft
	// message to the first store.
	conn, err := s.RPCContext().GRPCDial(s.ServingAddr())
	if err != nil {
		t.Fatal(err)
	}
	raftClient := storage.NewMultiRaftClient(conn)
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	stream, err := raftClient.RaftMessage(ctx)
	if err != nil {
		t.Fatal(err)
	}
	msg := storage.RaftMessageRequest{
		GroupID:     rangeID,
		ToReplica:   replica1,
		FromReplica: replica2,
		Message: raftpb.Message{
			Type: raftpb.MsgApp,
			To:   1,
		},
	}
	if err := stream.Send(&msg); err != nil {
		t.Fatal(err)
	}

	// Make sure the replica was created.
	store1, err := s.Stores().GetStore(1)
	if err != nil {
		t.Fatal(err)
	}
	util.SucceedsSoon(t, func() error {
		if replica, err := store1.GetReplica(rangeID); err != nil {
			return util.Errorf("failed to look up replica: %s", err)
		} else if replica.IsInitialized() {
			return util.Errorf("expected replica to be uninitialized")
		}
		return nil
	})

	// Create our own DistSender so we can force some requests to the
	// bogus range. The DistSender needs to be in scope for its own
	// MockRangeDescriptorDB closure.
	var sender *kv.DistSender
	sender = kv.NewDistSender(&kv.DistSenderContext{
		Clock:      s.Clock(),
		RPCContext: s.RPCContext(),
		RangeDescriptorDB: kv.MockRangeDescriptorDB(
			func(key roachpb.RKey, considerIntents, useReverseScan bool,
			) ([]roachpb.RangeDescriptor, []roachpb.RangeDescriptor, *roachpb.Error) {
				if key.Equal(roachpb.RKeyMin) {
					// Pass through requests for the first range to the real sender.
					desc, err := sender.FirstRange()
					if err != nil {
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
				Query: tspb.Query{
					Name:             "test.metric",
					Sources:          []string{"source1", "source2"},
					Downsampler:      tspb.TimeSeriesQueryAggregator_AVG.Enum(),
					SourceAggregator: tspb.TimeSeriesQueryAggregator_SUM.Enum(),
					Derivative:       tspb.TimeSeriesQueryDerivative_NONE.Enum(),
				},
				Datapoints: []tspb.TimeSeriesDatapoint{
					{
						TimestampNanos: 505 * 1e9,
						Value:          400.0,
					},
					{
						TimestampNanos: 515 * 1e9,
						Value:          500.0,
					},
					{
						TimestampNanos: 525 * 1e9,
						Value:          600.0,
					},
				},
			},
			{
				Query: tspb.Query{
					Name:             "other.metric",
					Sources:          []string{""},
					Downsampler:      tspb.TimeSeriesQueryAggregator_AVG.Enum(),
					SourceAggregator: tspb.TimeSeriesQueryAggregator_SUM.Enum(),
					Derivative:       tspb.TimeSeriesQueryDerivative_NONE.Enum(),
				},
				Datapoints: []tspb.TimeSeriesDatapoint{
					{
						TimestampNanos: 505 * 1e9,
						Value:          200.0,
					},
					{
						TimestampNanos: 515 * 1e9,
						Value:          250.0,
					},
				},
			},
			{
				Query: tspb.Query{
					Name:             "test.metric",
					Sources:          []string{"source1", "source2"},
					Downsampler:      tspb.TimeSeriesQueryAggregator_MAX.Enum(),
					SourceAggregator: tspb.TimeSeriesQueryAggregator_MAX.Enum(),
					Derivative:       tspb.TimeSeriesQueryDerivative_DERIVATIVE.Enum(),
				},
				Datapoints: []tspb.TimeSeriesDatapoint{
					{
						TimestampNanos: 505 * 1e9,
						Value:          1.0,
					},
					{
						TimestampNanos: 515 * 1e9,
						Value:          5.0,
					},
					{
						TimestampNanos: 525 * 1e9,
						Value:          5.0,
					},
				},
			},
		},
	}

	conn, err := tsrv.RPCContext().GRPCDial(tsrv.Ctx.Addr)
	if err != nil {
		t.Fatal(err)
	}
	response, err := tspb.NewTimeSeriesClient(conn).Query(context.Background(), &tspb.TimeSeriesQueryRequest{
		StartNanos: 500 * 1e9,
		EndNanos:   526 * 1e9,
		Queries: []tspb.Query{
			{
				Name: "test.metric",
			},
			{
				Name: "other.metric",
			},
			{
				Name:             "test.metric",
				Downsampler:      tspb.TimeSeriesQueryAggregator_MAX.Enum(),
				SourceAggregator: tspb.TimeSeriesQueryAggregator_MAX.Enum(),
				Derivative:       tspb.TimeSeriesQueryDerivative_DERIVATIVE.Enum(),
			},
		},
	})
	if err != nil {
		t.Fatal(err)
	}
	for _, r := range response.Results {
		sort.Strings(r.Sources)
	}
	if !proto.Equal(response, expectedResult) {
		t.Fatalf("actual response \n%v\n did not match expected response \n%v",
			response, expectedResult)
	}
}