From f6df5df9388279ee4627ed9e4999f0b83d09d1a8 Mon Sep 17 00:00:00 2001 From: David Ashpole Date: Thu, 12 Nov 2020 10:51:52 -0800 Subject: [PATCH] add opencensus tracing bridge (#1305) --- .github/dependabot.yml | 10 ++ CHANGELOG.md | 1 + bridge/opencensus/bridge.go | 217 ++++++++++++++++++++++++ bridge/opencensus/bridge_test.go | 276 +++++++++++++++++++++++++++++++ bridge/opencensus/go.mod | 10 ++ bridge/opencensus/go.sum | 59 +++++++ 6 files changed, 573 insertions(+) create mode 100644 bridge/opencensus/bridge.go create mode 100644 bridge/opencensus/bridge_test.go create mode 100644 bridge/opencensus/go.mod create mode 100644 bridge/opencensus/go.sum diff --git a/.github/dependabot.yml b/.github/dependabot.yml index 36f70040cfe..a143996ab84 100644 --- a/.github/dependabot.yml +++ b/.github/dependabot.yml @@ -36,6 +36,16 @@ updates: schedule: day: sunday interval: weekly + - + package-ecosystem: gomod + directory: /bridge/opencensus + labels: + - dependencies + - go + - "Skip Changelog" + schedule: + day: sunday + interval: weekly - package-ecosystem: gomod directory: /example/basic diff --git a/CHANGELOG.md b/CHANGELOG.md index 87d7720d077..4289ab3d444 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -13,6 +13,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm - `EventOption` and the related `NewEventConfig` function are added to the `go.opentelemetry.io/otel` package to configure Span events. (#1254) - A `TextMapPropagator` and associated `TextMapCarrier` are added to the `go.opentelemetry.io/otel/oteltest` package to test TextMap type propagators and their use. (#1259) - `SpanContextFromContext` returns `SpanContext` from context. (#1255) +- Add an opencensus to opentelemetry tracing bridge. (#1305) ### Changed diff --git a/bridge/opencensus/bridge.go b/bridge/opencensus/bridge.go new file mode 100644 index 00000000000..3c4e2840b25 --- /dev/null +++ b/bridge/opencensus/bridge.go @@ -0,0 +1,217 @@ +// Copyright The OpenTelemetry 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 opencensus + +import ( + "context" + "fmt" + + octrace "go.opencensus.io/trace" + + "go.opentelemetry.io/otel/codes" + "go.opentelemetry.io/otel/global" + "go.opentelemetry.io/otel/label" + "go.opentelemetry.io/otel/trace" +) + +// NewTracer returns an implementation of the OpenCensus Tracer interface which +// uses OpenTelemetry APIs. Using this implementation of Tracer "upgrades" +// libraries that use OpenCensus to OpenTelemetry to facilitate a migration. +func NewTracer(tracer trace.Tracer) octrace.Tracer { + return &otelTracer{tracer: tracer} +} + +type otelTracer struct { + tracer trace.Tracer +} + +var _ octrace.Tracer = (*otelTracer)(nil) + +func (o *otelTracer) StartSpan(ctx context.Context, name string, s ...octrace.StartOption) (context.Context, *octrace.Span) { + ctx, sp := o.tracer.Start(ctx, name, convertStartOptions(s, name)...) + return ctx, octrace.NewSpan(&span{otSpan: sp}) +} + +func convertStartOptions(optFns []octrace.StartOption, name string) []trace.SpanOption { + var ocOpts octrace.StartOptions + for _, fn := range optFns { + fn(&ocOpts) + } + otOpts := []trace.SpanOption{} + switch ocOpts.SpanKind { + case octrace.SpanKindClient: + otOpts = append(otOpts, trace.WithSpanKind(trace.SpanKindClient)) + case octrace.SpanKindServer: + otOpts = append(otOpts, trace.WithSpanKind(trace.SpanKindServer)) + case octrace.SpanKindUnspecified: + otOpts = append(otOpts, trace.WithSpanKind(trace.SpanKindUnspecified)) + } + + if ocOpts.Sampler != nil { + global.Handle(fmt.Errorf("ignoring custom sampler for span %q created by OpenCensus because OpenTelemetry does not support creating a span with a custom sampler", name)) + } + return otOpts +} + +func (o *otelTracer) StartSpanWithRemoteParent(ctx context.Context, name string, parent octrace.SpanContext, s ...octrace.StartOption) (context.Context, *octrace.Span) { + // make sure span context is zero'd out so we use the remote parent + ctx = trace.ContextWithSpan(ctx, nil) + ctx = trace.ContextWithRemoteSpanContext(ctx, ocSpanContextToOTel(parent)) + return o.StartSpan(ctx, name, s...) +} + +func (o *otelTracer) FromContext(ctx context.Context) *octrace.Span { + otSpan := trace.SpanFromContext(ctx) + return octrace.NewSpan(&span{otSpan: otSpan}) +} + +func (o *otelTracer) NewContext(parent context.Context, s *octrace.Span) context.Context { + if otSpan, ok := s.Internal().(*span); ok { + return trace.ContextWithSpan(parent, otSpan.otSpan) + } + global.Handle(fmt.Errorf("unable to create context with span %q, since it was created using a different tracer", s.String())) + return parent +} + +type span struct { + otSpan trace.Span +} + +func (s *span) IsRecordingEvents() bool { + return s.otSpan.IsRecording() +} + +func (s *span) End() { + s.otSpan.End() +} + +func (s *span) SpanContext() octrace.SpanContext { + return otelSpanContextToOc(s.otSpan.SpanContext()) +} + +func (s *span) SetName(name string) { + s.otSpan.SetName(name) +} + +func (s *span) SetStatus(status octrace.Status) { + s.otSpan.SetStatus(codes.Code(status.Code), status.Message) +} + +func (s *span) AddAttributes(attributes ...octrace.Attribute) { + s.otSpan.SetAttributes(convertAttributes(attributes)...) +} + +func convertAttributes(attributes []octrace.Attribute) []label.KeyValue { + otAttributes := make([]label.KeyValue, len(attributes)) + for i, a := range attributes { + otAttributes[i] = label.KeyValue{ + Key: label.Key(a.Key()), + Value: convertValue(a.Value()), + } + } + return otAttributes +} + +func convertValue(ocval interface{}) label.Value { + switch v := ocval.(type) { + case bool: + return label.BoolValue(v) + case int64: + return label.Int64Value(v) + case float64: + return label.Float64Value(v) + case string: + return label.StringValue(v) + default: + return label.StringValue("unknown") + } +} + +func (s *span) Annotate(attributes []octrace.Attribute, str string) { + s.otSpan.AddEvent(str, trace.WithAttributes(convertAttributes(attributes)...)) +} + +func (s *span) Annotatef(attributes []octrace.Attribute, format string, a ...interface{}) { + s.Annotate(attributes, fmt.Sprintf(format, a...)) +} + +var ( + uncompressedKey = label.Key("uncompressed byte size") + compressedKey = label.Key("compressed byte size") +) + +func (s *span) AddMessageSendEvent(messageID, uncompressedByteSize, compressedByteSize int64) { + s.otSpan.AddEvent("message send", + trace.WithAttributes( + label.KeyValue{ + Key: uncompressedKey, + Value: label.Int64Value(uncompressedByteSize), + }, + label.KeyValue{ + Key: compressedKey, + Value: label.Int64Value(compressedByteSize), + }), + ) +} + +func (s *span) AddMessageReceiveEvent(messageID, uncompressedByteSize, compressedByteSize int64) { + s.otSpan.AddEvent("message receive", + trace.WithAttributes( + label.KeyValue{ + Key: uncompressedKey, + Value: label.Int64Value(uncompressedByteSize), + }, + label.KeyValue{ + Key: compressedKey, + Value: label.Int64Value(compressedByteSize), + }), + ) +} + +func (s *span) AddLink(l octrace.Link) { + global.Handle(fmt.Errorf("ignoring OpenCensus link %+v for span %q because OpenTelemetry doesn't support setting links after creation", l, s.String())) +} + +func (s *span) String() string { + return fmt.Sprintf("span %s", s.otSpan.SpanContext().SpanID.String()) +} + +func otelSpanContextToOc(sc trace.SpanContext) octrace.SpanContext { + if sc.IsDebug() || sc.IsDeferred() { + global.Handle(fmt.Errorf("ignoring OpenTelemetry Debug or Deferred trace flags for span %q because they are not supported by OpenCensus", sc.SpanID)) + } + var to octrace.TraceOptions + if sc.IsSampled() { + // OpenCensus doesn't expose functions to directly set sampled + to = 0x1 + } + return octrace.SpanContext{ + TraceID: octrace.TraceID(sc.TraceID), + SpanID: octrace.SpanID(sc.SpanID), + TraceOptions: to, + } +} + +func ocSpanContextToOTel(sc octrace.SpanContext) trace.SpanContext { + var traceFlags byte + if sc.IsSampled() { + traceFlags = trace.FlagsSampled + } + return trace.SpanContext{ + TraceID: trace.TraceID(sc.TraceID), + SpanID: trace.SpanID(sc.SpanID), + TraceFlags: traceFlags, + } +} diff --git a/bridge/opencensus/bridge_test.go b/bridge/opencensus/bridge_test.go new file mode 100644 index 00000000000..a2cdb5d562c --- /dev/null +++ b/bridge/opencensus/bridge_test.go @@ -0,0 +1,276 @@ +// Copyright The OpenTelemetry 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 opencensus + +import ( + "context" + "testing" + + octrace "go.opencensus.io/trace" + + "go.opentelemetry.io/otel/codes" + "go.opentelemetry.io/otel/label" + "go.opentelemetry.io/otel/oteltest" + "go.opentelemetry.io/otel/trace" +) + +func TestMixedAPIs(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + tracer := tp.Tracer("mixedapitracer") + octrace.DefaultTracer = NewTracer(tracer) + + func() { + ctx := context.Background() + var ocspan1 *octrace.Span + ctx, ocspan1 = octrace.StartSpan(ctx, "OpenCensusSpan1") + defer ocspan1.End() + + var otspan1 trace.Span + ctx, otspan1 = tracer.Start(ctx, "OpenTelemetrySpan1") + defer otspan1.End() + + var ocspan2 *octrace.Span + ctx, ocspan2 = octrace.StartSpan(ctx, "OpenCensusSpan2") + defer ocspan2.End() + + var otspan2 trace.Span + _, otspan2 = tracer.Start(ctx, "OpenTelemetrySpan2") + defer otspan2.End() + }() + + spans := sr.Completed() + + if len(spans) != 4 { + for _, span := range spans { + t.Logf("Span: %s", span.Name()) + } + t.Fatalf("Got %d spans, exepected %d.", len(spans), 4) + } + + parent := &oteltest.Span{} + for i := range spans { + // Reverse the order we look at the spans in, since they are listed in last-to-first order. + i = len(spans) - i - 1 + // Verify that OpenCensus spans and opentelemetry spans have each other as parents. + if spans[i].ParentSpanID() != parent.SpanContext().SpanID { + t.Errorf("Span %v had parent %v. Expected %d", spans[i].Name(), spans[i].ParentSpanID(), parent.SpanContext().SpanID) + } + parent = spans[i] + } +} + +func TestStartOptions(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + octrace.DefaultTracer = NewTracer(tp.Tracer("startoptionstracer")) + + ctx := context.Background() + _, span := octrace.StartSpan(ctx, "OpenCensusSpan", octrace.WithSpanKind(octrace.SpanKindClient)) + span.End() + + spans := sr.Completed() + + if len(spans) != 1 { + t.Fatalf("Got %d spans, exepected %d", len(spans), 1) + } + + if spans[0].SpanKind() != trace.SpanKindClient { + t.Errorf("Got span kind %v, exepected %d", spans[0].SpanKind(), trace.SpanKindClient) + } +} + +func TestStartSpanWithRemoteParent(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + tracer := tp.Tracer("remoteparent") + octrace.DefaultTracer = NewTracer(tracer) + + ctx := context.Background() + ctx, parent := tracer.Start(ctx, "OpenTelemetrySpan1") + + _, span := octrace.StartSpanWithRemoteParent(ctx, "OpenCensusSpan", otelSpanContextToOc(parent.SpanContext())) + span.End() + + spans := sr.Completed() + + if len(spans) != 1 { + t.Fatalf("Got %d spans, exepected %d", len(spans), 1) + } + + if spans[0].ParentSpanID() != parent.SpanContext().SpanID { + t.Errorf("Span %v, had parent %v. Expected %d", spans[0].Name(), spans[0].ParentSpanID(), parent.SpanContext().SpanID) + } +} + +func TestToFromContext(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + tracer := tp.Tracer("tofromcontext") + octrace.DefaultTracer = NewTracer(tracer) + + func() { + ctx := context.Background() + + _, otSpan1 := tracer.Start(ctx, "OpenTelemetrySpan1") + defer otSpan1.End() + + // Use NewContext instead of the context from Start + ctx = octrace.NewContext(ctx, octrace.NewSpan(&span{otSpan: otSpan1})) + + ctx, _ = tracer.Start(ctx, "OpenTelemetrySpan2") + + // Get the opentelemetry span using the OpenCensus FromContext, and end it + otSpan2 := octrace.FromContext(ctx) + defer otSpan2.End() + + }() + + spans := sr.Completed() + + if len(spans) != 2 { + t.Fatalf("Got %d spans, exepected %d.", len(spans), 2) + } + + parent := &oteltest.Span{} + for i := range spans { + // Reverse the order we look at the spans in, since they are listed in last-to-first order. + i = len(spans) - i - 1 + // Verify that OpenCensus spans and opentelemetry spans have each other as parents. + if spans[i].ParentSpanID() != parent.SpanContext().SpanID { + t.Errorf("Span %v had parent %v. Expected %d", spans[i].Name(), spans[i].ParentSpanID(), parent.SpanContext().SpanID) + } + parent = spans[i] + } +} + +func TestIsRecordingEvents(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + octrace.DefaultTracer = NewTracer(tp.Tracer("isrecordingevents")) + + ctx := context.Background() + _, ocspan := octrace.StartSpan(ctx, "OpenCensusSpan1") + if !ocspan.IsRecordingEvents() { + t.Errorf("Got %v, expected true", ocspan.IsRecordingEvents()) + } +} + +func TestSetThings(t *testing.T) { + sr := new(oteltest.StandardSpanRecorder) + tp := oteltest.NewTracerProvider(oteltest.WithSpanRecorder(sr)) + octrace.DefaultTracer = NewTracer(tp.Tracer("setthings")) + + ctx := context.Background() + _, ocspan := octrace.StartSpan(ctx, "OpenCensusSpan1") + ocspan.SetName("span-foo") + ocspan.SetStatus(octrace.Status{Code: 1, Message: "foo"}) + ocspan.AddAttributes( + octrace.BoolAttribute("bool", true), + octrace.Int64Attribute("int64", 12345), + octrace.Float64Attribute("float64", 12.345), + octrace.StringAttribute("string", "stringval"), + ) + ocspan.Annotate( + []octrace.Attribute{octrace.StringAttribute("string", "annotateval")}, + "annotate", + ) + ocspan.Annotatef( + []octrace.Attribute{ + octrace.Int64Attribute("int64", 12345), + octrace.Float64Attribute("float64", 12.345), + }, + "annotate%d", 67890, + ) + ocspan.AddMessageSendEvent(123, 456, 789) + ocspan.AddMessageReceiveEvent(246, 135, 369) + ocspan.End() + + spans := sr.Completed() + + if len(spans) != 1 { + t.Fatalf("Got %d spans, exepected %d.", len(spans), 1) + } + s := spans[0] + + if s.Name() != "span-foo" { + t.Errorf("Got name %v, expected span-foo", s.Name()) + } + + if s.StatusCode().String() != codes.Error.String() { + t.Errorf("Got code %v, expected 1", s.StatusCode().String()) + } + + if s.StatusMessage() != "foo" { + t.Errorf("Got code %v, expected foo", s.StatusMessage()) + } + + if v := s.Attributes()[label.Key("bool")]; !v.AsBool() { + t.Errorf("Got attributes[bool] %v, expected true", v.AsBool()) + } + if v := s.Attributes()[label.Key("int64")]; v.AsInt64() != 12345 { + t.Errorf("Got attributes[int64] %v, expected 12345", v.AsInt64()) + } + if v := s.Attributes()[label.Key("float64")]; v.AsFloat64() != 12.345 { + t.Errorf("Got attributes[float64] %v, expected 12.345", v.AsFloat64()) + } + if v := s.Attributes()[label.Key("string")]; v.AsString() != "stringval" { + t.Errorf("Got attributes[string] %v, expected stringval", v.AsString()) + } + + if len(s.Events()) != 4 { + t.Fatalf("Got len(events) = %v, expected 4", len(s.Events())) + } + annotateEvent := s.Events()[0] + annotatefEvent := s.Events()[1] + sendEvent := s.Events()[2] + receiveEvent := s.Events()[3] + if v := annotateEvent.Attributes[label.Key("string")]; v.AsString() != "annotateval" { + t.Errorf("Got annotateEvent.Attributes[string] = %v, expected annotateval", v.AsString()) + } + if annotateEvent.Name != "annotate" { + t.Errorf("Got annotateEvent.Name = %v, expected annotate", annotateEvent.Name) + } + if v := annotatefEvent.Attributes[label.Key("int64")]; v.AsInt64() != 12345 { + t.Errorf("Got annotatefEvent.Attributes[int64] = %v, expected 12345", v.AsInt64()) + } + if v := annotatefEvent.Attributes[label.Key("float64")]; v.AsFloat64() != 12.345 { + t.Errorf("Got annotatefEvent.Attributes[float64] = %v, expected 12.345", v.AsFloat64()) + } + if annotatefEvent.Name != "annotate67890" { + t.Errorf("Got annotatefEvent.Name = %v, expected annotate67890", annotatefEvent.Name) + } + if v := annotateEvent.Attributes[label.Key("string")]; v.AsString() != "annotateval" { + t.Errorf("Got annotateEvent.Attributes[string] = %v, expected annotateval", v.AsString()) + } + if sendEvent.Name != "message send" { + t.Errorf("Got sendEvent.Name = %v, expected message send", sendEvent.Name) + } + if v := sendEvent.Attributes[uncompressedKey]; v.AsInt64() != 456 { + t.Errorf("Got sendEvent.Attributes[uncompressedKey] = %v, expected 456", v.AsInt64()) + } + if v := sendEvent.Attributes[compressedKey]; v.AsInt64() != 789 { + t.Errorf("Got sendEvent.Attributes[compressedKey] = %v, expected 789", v.AsInt64()) + } + if receiveEvent.Name != "message receive" { + t.Errorf("Got receiveEvent.Name = %v, expected message receive", receiveEvent.Name) + } + if v := receiveEvent.Attributes[uncompressedKey]; v.AsInt64() != 135 { + t.Errorf("Got receiveEvent.Attributes[uncompressedKey] = %v, expected 135", v.AsInt64()) + } + if v := receiveEvent.Attributes[compressedKey]; v.AsInt64() != 369 { + t.Errorf("Got receiveEvent.Attributes[compressedKey] = %v, expected 369", v.AsInt64()) + } +} diff --git a/bridge/opencensus/go.mod b/bridge/opencensus/go.mod new file mode 100644 index 00000000000..a9960958414 --- /dev/null +++ b/bridge/opencensus/go.mod @@ -0,0 +1,10 @@ +module go.opentelemetry.io/opentelemetry-go/bridge/opencensus + +go 1.15 + +require ( + go.opencensus.io v0.22.6-0.20201102222123-380f4078db9f + go.opentelemetry.io/otel v0.13.0 +) + +replace go.opentelemetry.io/otel => ../.. diff --git a/bridge/opencensus/go.sum b/bridge/opencensus/go.sum new file mode 100644 index 00000000000..3d2eb5226b8 --- /dev/null +++ b/bridge/opencensus/go.sum @@ -0,0 +1,59 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= +github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q= +github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I= +github.com/golang/groupcache 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