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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,273 @@ | ||
| /* | ||
| * | ||
| * Copyright 2024 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 pickfirstleaf_test | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "testing" | ||
|
|
||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/balancer/pickfirst/pickfirstleaf" | ||
| "google.golang.org/grpc/connectivity" | ||
| "google.golang.org/grpc/credentials/insecure" | ||
| "google.golang.org/grpc/internal" | ||
| "google.golang.org/grpc/internal/stubserver" | ||
| "google.golang.org/grpc/internal/testutils" | ||
| "google.golang.org/grpc/internal/testutils/stats" | ||
| testgrpc "google.golang.org/grpc/interop/grpc_testing" | ||
| testpb "google.golang.org/grpc/interop/grpc_testing" | ||
| "google.golang.org/grpc/resolver" | ||
| "google.golang.org/grpc/resolver/manual" | ||
| "google.golang.org/grpc/serviceconfig" | ||
| "google.golang.org/grpc/stats/opentelemetry" | ||
|
|
||
| "go.opentelemetry.io/otel/attribute" | ||
| "go.opentelemetry.io/otel/sdk/metric" | ||
| "go.opentelemetry.io/otel/sdk/metric/metricdata" | ||
| "go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest" | ||
| ) | ||
|
|
||
| var pfConfig string | ||
|
|
||
| func init() { | ||
| pfConfig = fmt.Sprintf(`{ | ||
| "loadBalancingConfig": [ | ||
| { | ||
| %q: { | ||
| } | ||
| } | ||
| ] | ||
| }`, pickfirstleaf.Name) | ||
| } | ||
|
|
||
| // TestPickFirstMetrics tests pick first metrics. It configures a pick first | ||
| // balancer, causes it to connect and then disconnect, and expects the | ||
| // subsequent metrics to emit from that. | ||
| func (s) TestPickFirstMetrics(t *testing.T) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout) | ||
| defer cancel() | ||
|
|
||
| ss := &stubserver.StubServer{ | ||
| EmptyCallF: func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) { | ||
| return &testpb.Empty{}, nil | ||
| }, | ||
| } | ||
| ss.StartServer() | ||
| defer ss.Stop() | ||
|
|
||
| sc := internal.ParseServiceConfig.(func(string) *serviceconfig.ParseResult)(pfConfig) | ||
|
|
||
| r := manual.NewBuilderWithScheme("whatever") | ||
| r.InitialState(resolver.State{ | ||
| ServiceConfig: sc, | ||
| Addresses: []resolver.Address{{Addr: ss.Address}}}, | ||
| ) | ||
|
|
||
| tmr := stats.NewTestMetricsRecorder() | ||
| cc, err := grpc.NewClient(r.Scheme()+":///", grpc.WithStatsHandler(tmr), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(r)) | ||
| if err != nil { | ||
| t.Fatalf("NewClient() failed with error: %v", err) | ||
| } | ||
| defer cc.Close() | ||
|
|
||
| tsc := testgrpc.NewTestServiceClient(cc) | ||
| if _, err := tsc.EmptyCall(ctx, &testpb.Empty{}); err != nil { | ||
| t.Fatalf("EmptyCall() failed: %v", err) | ||
| } | ||
|
|
||
| if got, _ := tmr.Metric("grpc.lb.pick_first.connection_attempts_succeeded"); got != 1 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.connection_attempts_succeeded", got, 1) | ||
| } | ||
| if got, _ := tmr.Metric("grpc.lb.pick_first.connection_attempts_failed"); got != 0 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.connection_attempts_failed", got, 0) | ||
| } | ||
| if got, _ := tmr.Metric("grpc.lb.pick_first.disconnections"); got != 0 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.disconnections", got, 0) | ||
| } | ||
|
|
||
| ss.Stop() | ||
| testutils.AwaitState(ctx, t, cc, connectivity.Idle) | ||
| if got, _ := tmr.Metric("grpc.lb.pick_first.disconnections"); got != 1 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.disconnections", got, 1) | ||
| } | ||
| } | ||
|
|
||
| // TestPickFirstMetricsFailure tests the connection attempts failed metric. It | ||
| // configures a channel and scenario that causes a pick first connection attempt | ||
| // to fail, and then expects that metric to emit. | ||
| func (s) TestPickFirstMetricsFailure(t *testing.T) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout) | ||
| defer cancel() | ||
|
|
||
| sc := internal.ParseServiceConfig.(func(string) *serviceconfig.ParseResult)(pfConfig) | ||
|
|
||
| r := manual.NewBuilderWithScheme("whatever") | ||
| r.InitialState(resolver.State{ | ||
| ServiceConfig: sc, | ||
| Addresses: []resolver.Address{{Addr: "bad address"}}}, | ||
| ) | ||
| grpcTarget := r.Scheme() + ":///" | ||
| tmr := stats.NewTestMetricsRecorder() | ||
| cc, err := grpc.NewClient(grpcTarget, grpc.WithStatsHandler(tmr), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(r)) | ||
| if err != nil { | ||
| t.Fatalf("NewClient() failed with error: %v", err) | ||
| } | ||
| defer cc.Close() | ||
|
|
||
| tsc := testgrpc.NewTestServiceClient(cc) | ||
| if _, err := tsc.EmptyCall(ctx, &testpb.Empty{}); err == nil { | ||
| t.Fatalf("EmptyCall() passed when expected to fail") | ||
| } | ||
|
|
||
| if got, _ := tmr.Metric("grpc.lb.pick_first.connection_attempts_succeeded"); got != 0 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.connection_attempts_succeeded", got, 0) | ||
| } | ||
| if got, _ := tmr.Metric("grpc.lb.pick_first.connection_attempts_failed"); got != 1 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.connection_attempts_failed", got, 1) | ||
| } | ||
| if got, _ := tmr.Metric("grpc.lb.pick_first.disconnections"); got != 0 { | ||
| t.Errorf("Unexpected data for metric %v, got: %v, want: %v", "grpc.lb.pick_first.disconnections", got, 0) | ||
| } | ||
| } | ||
|
|
||
| // TestPickFirstMetricsE2E tests the pick first metrics end to end. It | ||
| // configures a channel with an OpenTelemetry plugin, induces all 3 pick first | ||
| // metrics to emit, and makes sure the correct OpenTelemetry metrics atoms emit. | ||
| func (s) TestPickFirstMetricsE2E(t *testing.T) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout) | ||
| defer cancel() | ||
|
|
||
| ss := &stubserver.StubServer{ | ||
| EmptyCallF: func(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) { | ||
| return &testpb.Empty{}, nil | ||
| }, | ||
| } | ||
| ss.StartServer() | ||
| defer ss.Stop() | ||
|
|
||
| sc := internal.ParseServiceConfig.(func(string) *serviceconfig.ParseResult)(pfConfig) | ||
| r := manual.NewBuilderWithScheme("whatever") | ||
| r.InitialState(resolver.State{ | ||
| ServiceConfig: sc, | ||
| Addresses: []resolver.Address{{Addr: "bad address"}}}, | ||
| ) // Will trigger connection failed. | ||
|
|
||
| grpcTarget := r.Scheme() + ":///" | ||
| reader := metric.NewManualReader() | ||
| provider := metric.NewMeterProvider(metric.WithReader(reader)) | ||
| mo := opentelemetry.MetricsOptions{ | ||
| MeterProvider: provider, | ||
| Metrics: opentelemetry.DefaultMetrics().Add("grpc.lb.pick_first.disconnections", "grpc.lb.pick_first.connection_attempts_succeeded", "grpc.lb.pick_first.connection_attempts_failed"), | ||
| } | ||
|
|
||
| cc, err := grpc.NewClient(grpcTarget, opentelemetry.DialOption(opentelemetry.Options{MetricsOptions: mo}), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(r)) | ||
| if err != nil { | ||
| t.Fatalf("NewClient() failed with error: %v", err) | ||
| } | ||
| defer cc.Close() | ||
|
|
||
| tsc := testgrpc.NewTestServiceClient(cc) | ||
| if _, err := tsc.EmptyCall(ctx, &testpb.Empty{}); err == nil { | ||
| t.Fatalf("EmptyCall() passed when expected to fail") | ||
| } | ||
|
|
||
| r.UpdateState(resolver.State{ | ||
| ServiceConfig: sc, | ||
| Addresses: []resolver.Address{{Addr: ss.Address}}, | ||
| }) // Will trigger successful connection metric. | ||
| if _, err := tsc.EmptyCall(ctx, &testpb.Empty{}, grpc.WaitForReady(true)); err != nil { | ||
| t.Fatalf("EmptyCall() failed: %v", err) | ||
| } | ||
|
|
||
| // Stop the server, that should send signal to disconnect, which will | ||
| // eventually emit disconnection metric before ClientConn goes IDLE. | ||
| ss.Stop() | ||
| testutils.AwaitState(ctx, t, cc, connectivity.Idle) | ||
| wantMetrics := []metricdata.Metrics{ | ||
| { | ||
| Name: "grpc.lb.pick_first.connection_attempts_succeeded", | ||
| Description: "EXPERIMENTAL. Number of successful connection attempts.", | ||
| Unit: "attempt", | ||
| Data: metricdata.Sum[int64]{ | ||
| DataPoints: []metricdata.DataPoint[int64]{ | ||
| { | ||
| Attributes: attribute.NewSet(attribute.String("grpc.target", grpcTarget)), | ||
| Value: 1, | ||
| }, | ||
| }, | ||
| Temporality: metricdata.CumulativeTemporality, | ||
| IsMonotonic: true, | ||
| }, | ||
| }, | ||
| { | ||
| Name: "grpc.lb.pick_first.connection_attempts_failed", | ||
| Description: "EXPERIMENTAL. Number of failed connection attempts.", | ||
| Unit: "attempt", | ||
| Data: metricdata.Sum[int64]{ | ||
| DataPoints: []metricdata.DataPoint[int64]{ | ||
| { | ||
| Attributes: attribute.NewSet(attribute.String("grpc.target", grpcTarget)), | ||
| Value: 1, | ||
| }, | ||
| }, | ||
| Temporality: metricdata.CumulativeTemporality, | ||
| IsMonotonic: true, | ||
| }, | ||
| }, | ||
| { | ||
| Name: "grpc.lb.pick_first.disconnections", | ||
| Description: "EXPERIMENTAL. Number of times the selected subchannel becomes disconnected.", | ||
| Unit: "disconnection", | ||
| Data: metricdata.Sum[int64]{ | ||
| DataPoints: []metricdata.DataPoint[int64]{ | ||
| { | ||
| Attributes: attribute.NewSet(attribute.String("grpc.target", grpcTarget)), | ||
| Value: 1, | ||
| }, | ||
| }, | ||
| Temporality: metricdata.CumulativeTemporality, | ||
| IsMonotonic: true, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| gotMetrics := metricsDataFromReader(ctx, reader) | ||
| for _, metric := range wantMetrics { | ||
| val, ok := gotMetrics[metric.Name] | ||
| if !ok { | ||
| t.Fatalf("Metric %v not present in recorded metrics", metric.Name) | ||
| } | ||
| if !metricdatatest.AssertEqual(t, metric, val, metricdatatest.IgnoreTimestamp(), metricdatatest.IgnoreExemplars()) { | ||
| t.Fatalf("Metrics data type not equal for metric: %v", metric.Name) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func metricsDataFromReader(ctx context.Context, reader *metric.ManualReader) map[string]metricdata.Metrics { | ||
| rm := &metricdata.ResourceMetrics{} | ||
| reader.Collect(ctx, rm) | ||
| gotMetrics := map[string]metricdata.Metrics{} | ||
| for _, sm := range rm.ScopeMetrics { | ||
| for _, m := range sm.Metrics { | ||
| gotMetrics[m.Name] = m | ||
| } | ||
| } | ||
| return gotMetrics | ||
| } |
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