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allow for stdout exporter for tracing - to allow for debugging (#3207)

This commit is contained in:
Dave Protasowski 2025-07-05 21:50:58 -04:00 committed by GitHub
parent e959f44282
commit d601f66084
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GPG Key ID: B5690EEEBB952194
14 changed files with 755 additions and 1 deletions
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1
go.mod
View File

@ -31,6 +31,7 @@ require (
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.37.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.37.0
go.opentelemetry.io/otel/exporters/prometheus v0.59.0
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0
go.opentelemetry.io/otel/metric v1.37.0
go.opentelemetry.io/otel/sdk v1.37.0
go.opentelemetry.io/otel/sdk/metric v1.37.0

2
go.sum
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@ -385,6 +385,8 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.37.0 h1:bDMKF
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.37.0/go.mod h1:dDT67G/IkA46Mr2l9Uj7HsQVwsjASyV9SjGofsiUZDA=
go.opentelemetry.io/otel/exporters/prometheus v0.59.0 h1:HHf+wKS6o5++XZhS98wvILrLVgHxjA/AMjqHKes+uzo=
go.opentelemetry.io/otel/exporters/prometheus v0.59.0/go.mod h1:R8GpRXTZrqvXHDEGVH5bF6+JqAZcK8PjJcZ5nGhEWiE=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0 h1:SNhVp/9q4Go/XHBkQ1/d5u9P/U+L1yaGPoi0x+mStaI=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0/go.mod h1:tx8OOlGH6R4kLV67YaYO44GFXloEjGPZuMjEkaaqIp4=
go.opentelemetry.io/otel/metric v1.37.0 h1:mvwbQS5m0tbmqML4NqK+e3aDiO02vsf/WgbsdpcPoZE=
go.opentelemetry.io/otel/metric v1.37.0/go.mod h1:04wGrZurHYKOc+RKeye86GwKiTb9FKm1WHtO+4EVr2E=
go.opentelemetry.io/otel/sdk v1.37.0 h1:ItB0QUqnjesGRvNcmAcU0LyvkVyGJ2xftD29bWdDvKI=

3
observability/tracing/config.go
View File

@ -27,6 +27,7 @@ const (
ProtocolGRPC = "grpc"
ProtocolHTTPProtobuf = "http/protobuf"
ProtocolNone = "none"
ProtocolStdout = "stdout"
)
type Config struct {
@ -41,7 +42,7 @@ func (c *Config) Validate() error {
if c.Endpoint == "" {
return fmt.Errorf("endpoint should be set for protocol %q", c.Protocol)
}
case ProtocolNone:
case ProtocolNone, ProtocolStdout:
if c.Endpoint != "" {
return errors.New("endpoint should not be set when protocol is 'none'")
}

11
observability/tracing/provider.go
View File

@ -26,6 +26,7 @@ import (
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/propagation"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
@ -88,11 +89,17 @@ func exporterFor(ctx context.Context, cfg Config) (sdktrace.SpanExporter, error)
return buildGRPC(ctx, cfg)
case ProtocolHTTPProtobuf:
return buildHTTP(ctx, cfg)
case ProtocolStdout:
return buildStdout()
default:
return nil, fmt.Errorf("unsupported metric exporter: %q", cfg.Protocol)
}
}
func buildStdout() (sdktrace.SpanExporter, error) {
return stdouttrace.New()
}
func buildGRPC(ctx context.Context, cfg Config) (sdktrace.SpanExporter, error) {
var grpcOpts []otlptracegrpc.Option
@ -162,6 +169,10 @@ func sampleFor(cfg Config) (sdktrace.Sampler, error) {
return nil, nil
}
if cfg.Protocol == ProtocolStdout {
return sdktrace.AlwaysSample(), nil
}
rate := cfg.SamplingRate
if val := os.Getenv("OTEL_TRACES_SAMPLER_ARG"); val != "" {

201
vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/LICENSE generated vendored Normal file
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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3
vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/README.md generated vendored Normal file
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@ -0,0 +1,3 @@
# STDOUT Trace Exporter
[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)

85
vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/config.go generated vendored Normal file
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@ -0,0 +1,85 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
import (
"io"
"os"
)
var (
defaultWriter = os.Stdout
defaultPrettyPrint = false
defaultTimestamps = true
)
// config contains options for the STDOUT exporter.
type config struct {
// Writer is the destination. If not set, os.Stdout is used.
Writer io.Writer
// PrettyPrint will encode the output into readable JSON. Default is
// false.
PrettyPrint bool
// Timestamps specifies if timestamps should be printed. Default is
// true.
Timestamps bool
}
// newConfig creates a validated Config configured with options.
func newConfig(options ...Option) config {
cfg := config{
Writer: defaultWriter,
PrettyPrint: defaultPrettyPrint,
Timestamps: defaultTimestamps,
}
for _, opt := range options {
cfg = opt.apply(cfg)
}
return cfg
}
// Option sets the value of an option for a Config.
type Option interface {
apply(config) config
}
// WithWriter sets the export stream destination.
func WithWriter(w io.Writer) Option {
return writerOption{w}
}
type writerOption struct {
W io.Writer
}
func (o writerOption) apply(cfg config) config {
cfg.Writer = o.W
return cfg
}
// WithPrettyPrint prettifies the emitted output.
func WithPrettyPrint() Option {
return prettyPrintOption(true)
}
type prettyPrintOption bool
func (o prettyPrintOption) apply(cfg config) config {
cfg.PrettyPrint = bool(o)
return cfg
}
// WithoutTimestamps sets the export stream to not include timestamps.
func WithoutTimestamps() Option {
return timestampsOption(false)
}
type timestampsOption bool
func (o timestampsOption) apply(cfg config) config {
cfg.Timestamps = bool(o)
return cfg
}

6
vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/doc.go generated vendored Normal file
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@ -0,0 +1,6 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package stdouttrace contains an OpenTelemetry exporter for tracing
// telemetry to be written to an output destination as JSON.
package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"

103
vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/trace.go generated vendored Normal file
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@ -0,0 +1,103 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
import (
"context"
"encoding/json"
"sync"
"time"
"go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/sdk/trace/tracetest"
)
var zeroTime time.Time
var _ trace.SpanExporter = &Exporter{}
// New creates an Exporter with the passed options.
func New(options ...Option) (*Exporter, error) {
cfg := newConfig(options...)
enc := json.NewEncoder(cfg.Writer)
if cfg.PrettyPrint {
enc.SetIndent("", "\t")
}
return &Exporter{
encoder: enc,
timestamps: cfg.Timestamps,
}, nil
}
// Exporter is an implementation of trace.SpanSyncer that writes spans to stdout.
type Exporter struct {
encoder *json.Encoder
encoderMu sync.Mutex
timestamps bool
stoppedMu sync.RWMutex
stopped bool
}
// ExportSpans writes spans in json format to stdout.
func (e *Exporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan) error {
if err := ctx.Err(); err != nil {
return err
}
e.stoppedMu.RLock()
stopped := e.stopped
e.stoppedMu.RUnlock()
if stopped {
return nil
}
if len(spans) == 0 {
return nil
}
stubs := tracetest.SpanStubsFromReadOnlySpans(spans)
e.encoderMu.Lock()
defer e.encoderMu.Unlock()
for i := range stubs {
stub := &stubs[i]
// Remove timestamps
if !e.timestamps {
stub.StartTime = zeroTime
stub.EndTime = zeroTime
for j := range stub.Events {
ev := &stub.Events[j]
ev.Time = zeroTime
}
}
// Encode span stubs, one by one
if err := e.encoder.Encode(stub); err != nil {
return err
}
}
return nil
}
// Shutdown is called to stop the exporter, it performs no action.
func (e *Exporter) Shutdown(ctx context.Context) error {
e.stoppedMu.Lock()
e.stopped = true
e.stoppedMu.Unlock()
return nil
}
// MarshalLog is the marshaling function used by the logging system to represent this Exporter.
func (e *Exporter) MarshalLog() interface{} {
return struct {
Type string
WithTimestamps bool
}{
Type: "stdout",
WithTimestamps: e.timestamps,
}
}

3
vendor/go.opentelemetry.io/otel/sdk/trace/tracetest/README.md generated vendored Normal file
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@ -0,0 +1,3 @@
# SDK Trace test
[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/sdk/trace/tracetest)](https://pkg.go.dev/go.opentelemetry.io/otel/sdk/trace/tracetest)

74
vendor/go.opentelemetry.io/otel/sdk/trace/tracetest/exporter.go generated vendored Normal file
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@ -0,0 +1,74 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package tracetest is a testing helper package for the SDK. User can
// configure no-op or in-memory exporters to verify different SDK behaviors or
// custom instrumentation.
package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
import (
"context"
"sync"
"go.opentelemetry.io/otel/sdk/trace"
)
var _ trace.SpanExporter = (*NoopExporter)(nil)
// NewNoopExporter returns a new no-op exporter.
func NewNoopExporter() *NoopExporter {
return new(NoopExporter)
}
// NoopExporter is an exporter that drops all received spans and performs no
// action.
type NoopExporter struct{}
// ExportSpans handles export of spans by dropping them.
func (nsb *NoopExporter) ExportSpans(context.Context, []trace.ReadOnlySpan) error { return nil }
// Shutdown stops the exporter by doing nothing.
func (nsb *NoopExporter) Shutdown(context.Context) error { return nil }
var _ trace.SpanExporter = (*InMemoryExporter)(nil)
// NewInMemoryExporter returns a new InMemoryExporter.
func NewInMemoryExporter() *InMemoryExporter {
return new(InMemoryExporter)
}
// InMemoryExporter is an exporter that stores all received spans in-memory.
type InMemoryExporter struct {
mu sync.Mutex
ss SpanStubs
}
// ExportSpans handles export of spans by storing them in memory.
func (imsb *InMemoryExporter) ExportSpans(_ context.Context, spans []trace.ReadOnlySpan) error {
imsb.mu.Lock()
defer imsb.mu.Unlock()
imsb.ss = append(imsb.ss, SpanStubsFromReadOnlySpans(spans)...)
return nil
}
// Shutdown stops the exporter by clearing spans held in memory.
func (imsb *InMemoryExporter) Shutdown(context.Context) error {
imsb.Reset()
return nil
}
// Reset the current in-memory storage.
func (imsb *InMemoryExporter) Reset() {
imsb.mu.Lock()
defer imsb.mu.Unlock()
imsb.ss = nil
}
// GetSpans returns the current in-memory stored spans.
func (imsb *InMemoryExporter) GetSpans() SpanStubs {
imsb.mu.Lock()
defer imsb.mu.Unlock()
ret := make(SpanStubs, len(imsb.ss))
copy(ret, imsb.ss)
return ret
}

94
vendor/go.opentelemetry.io/otel/sdk/trace/tracetest/recorder.go generated vendored Normal file
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@ -0,0 +1,94 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
import (
"context"
"sync"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
// SpanRecorder records started and ended spans.
type SpanRecorder struct {
startedMu sync.RWMutex
started []sdktrace.ReadWriteSpan
endedMu sync.RWMutex
ended []sdktrace.ReadOnlySpan
}
var _ sdktrace.SpanProcessor = (*SpanRecorder)(nil)
// NewSpanRecorder returns a new initialized SpanRecorder.
func NewSpanRecorder() *SpanRecorder {
return new(SpanRecorder)
}
// OnStart records started spans.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) OnStart(_ context.Context, s sdktrace.ReadWriteSpan) {
sr.startedMu.Lock()
defer sr.startedMu.Unlock()
sr.started = append(sr.started, s)
}
// OnEnd records completed spans.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) OnEnd(s sdktrace.ReadOnlySpan) {
sr.endedMu.Lock()
defer sr.endedMu.Unlock()
sr.ended = append(sr.ended, s)
}
// Shutdown does nothing.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) Shutdown(context.Context) error {
return nil
}
// ForceFlush does nothing.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) ForceFlush(context.Context) error {
return nil
}
// Started returns a copy of all started spans that have been recorded.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) Started() []sdktrace.ReadWriteSpan {
sr.startedMu.RLock()
defer sr.startedMu.RUnlock()
dst := make([]sdktrace.ReadWriteSpan, len(sr.started))
copy(dst, sr.started)
return dst
}
// Reset clears the recorded spans.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) Reset() {
sr.startedMu.Lock()
sr.endedMu.Lock()
defer sr.startedMu.Unlock()
defer sr.endedMu.Unlock()
sr.started = nil
sr.ended = nil
}
// Ended returns a copy of all ended spans that have been recorded.
//
// This method is safe to be called concurrently.
func (sr *SpanRecorder) Ended() []sdktrace.ReadOnlySpan {
sr.endedMu.RLock()
defer sr.endedMu.RUnlock()
dst := make([]sdktrace.ReadOnlySpan, len(sr.ended))
copy(dst, sr.ended)
return dst
}

166
vendor/go.opentelemetry.io/otel/sdk/trace/tracetest/span.go generated vendored Normal file
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@ -0,0 +1,166 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package tracetest // import "go.opentelemetry.io/otel/sdk/trace/tracetest"
import (
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/sdk/instrumentation"
"go.opentelemetry.io/otel/sdk/resource"
tracesdk "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
)
// SpanStubs is a slice of SpanStub use for testing an SDK.
type SpanStubs []SpanStub
// SpanStubsFromReadOnlySpans returns SpanStubs populated from ro.
func SpanStubsFromReadOnlySpans(ro []tracesdk.ReadOnlySpan) SpanStubs {
if len(ro) == 0 {
return nil
}
s := make(SpanStubs, 0, len(ro))
for _, r := range ro {
s = append(s, SpanStubFromReadOnlySpan(r))
}
return s
}
// Snapshots returns s as a slice of ReadOnlySpans.
func (s SpanStubs) Snapshots() []tracesdk.ReadOnlySpan {
if len(s) == 0 {
return nil
}
ro := make([]tracesdk.ReadOnlySpan, len(s))
for i := 0; i < len(s); i++ {
ro[i] = s[i].Snapshot()
}
return ro
}
// SpanStub is a stand-in for a Span.
type SpanStub struct {
Name string
SpanContext trace.SpanContext
Parent trace.SpanContext
SpanKind trace.SpanKind
StartTime time.Time
EndTime time.Time
Attributes []attribute.KeyValue
Events []tracesdk.Event
Links []tracesdk.Link
Status tracesdk.Status
DroppedAttributes int
DroppedEvents int
DroppedLinks int
ChildSpanCount int
Resource *resource.Resource
InstrumentationScope instrumentation.Scope
// Deprecated: use InstrumentationScope instead.
InstrumentationLibrary instrumentation.Library //nolint:staticcheck // This method needs to be define for backwards compatibility
}
// SpanStubFromReadOnlySpan returns a SpanStub populated from ro.
func SpanStubFromReadOnlySpan(ro tracesdk.ReadOnlySpan) SpanStub {
if ro == nil {
return SpanStub{}
}
return SpanStub{
Name: ro.Name(),
SpanContext: ro.SpanContext(),
Parent: ro.Parent(),
SpanKind: ro.SpanKind(),
StartTime: ro.StartTime(),
EndTime: ro.EndTime(),
Attributes: ro.Attributes(),
Events: ro.Events(),
Links: ro.Links(),
Status: ro.Status(),
DroppedAttributes: ro.DroppedAttributes(),
DroppedEvents: ro.DroppedEvents(),
DroppedLinks: ro.DroppedLinks(),
ChildSpanCount: ro.ChildSpanCount(),
Resource: ro.Resource(),
InstrumentationScope: ro.InstrumentationScope(),
InstrumentationLibrary: ro.InstrumentationScope(),
}
}
// Snapshot returns a read-only copy of the SpanStub.
func (s SpanStub) Snapshot() tracesdk.ReadOnlySpan {
scopeOrLibrary := s.InstrumentationScope
if scopeOrLibrary.Name == "" && scopeOrLibrary.Version == "" && scopeOrLibrary.SchemaURL == "" {
scopeOrLibrary = s.InstrumentationLibrary
}
return spanSnapshot{
name: s.Name,
spanContext: s.SpanContext,
parent: s.Parent,
spanKind: s.SpanKind,
startTime: s.StartTime,
endTime: s.EndTime,
attributes: s.Attributes,
events: s.Events,
links: s.Links,
status: s.Status,
droppedAttributes: s.DroppedAttributes,
droppedEvents: s.DroppedEvents,
droppedLinks: s.DroppedLinks,
childSpanCount: s.ChildSpanCount,
resource: s.Resource,
instrumentationScope: scopeOrLibrary,
}
}
type spanSnapshot struct {
// Embed the interface to implement the private method.
tracesdk.ReadOnlySpan
name string
spanContext trace.SpanContext
parent trace.SpanContext
spanKind trace.SpanKind
startTime time.Time
endTime time.Time
attributes []attribute.KeyValue
events []tracesdk.Event
links []tracesdk.Link
status tracesdk.Status
droppedAttributes int
droppedEvents int
droppedLinks int
childSpanCount int
resource *resource.Resource
instrumentationScope instrumentation.Scope
}
func (s spanSnapshot) Name() string { return s.name }
func (s spanSnapshot) SpanContext() trace.SpanContext { return s.spanContext }
func (s spanSnapshot) Parent() trace.SpanContext { return s.parent }
func (s spanSnapshot) SpanKind() trace.SpanKind { return s.spanKind }
func (s spanSnapshot) StartTime() time.Time { return s.startTime }
func (s spanSnapshot) EndTime() time.Time { return s.endTime }
func (s spanSnapshot) Attributes() []attribute.KeyValue { return s.attributes }
func (s spanSnapshot) Links() []tracesdk.Link { return s.links }
func (s spanSnapshot) Events() []tracesdk.Event { return s.events }
func (s spanSnapshot) Status() tracesdk.Status { return s.status }
func (s spanSnapshot) DroppedAttributes() int { return s.droppedAttributes }
func (s spanSnapshot) DroppedLinks() int { return s.droppedLinks }
func (s spanSnapshot) DroppedEvents() int { return s.droppedEvents }
func (s spanSnapshot) ChildSpanCount() int { return s.childSpanCount }
func (s spanSnapshot) Resource() *resource.Resource { return s.resource }
func (s spanSnapshot) InstrumentationScope() instrumentation.Scope {
return s.instrumentationScope
}
func (s spanSnapshot) InstrumentationLibrary() instrumentation.Library { //nolint:staticcheck // This method needs to be define for backwards compatibility
return s.instrumentationScope
}

4
vendor/modules.txt vendored
View File

@ -284,6 +284,9 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/retry
# go.opentelemetry.io/otel/exporters/prometheus v0.59.0
## explicit; go 1.23.0
go.opentelemetry.io/otel/exporters/prometheus
# go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0
## explicit; go 1.23.0
go.opentelemetry.io/otel/exporters/stdout/stdouttrace
# go.opentelemetry.io/otel/metric v1.37.0
## explicit; go 1.23.0
go.opentelemetry.io/otel/metric
@ -297,6 +300,7 @@ go.opentelemetry.io/otel/sdk/internal/env
go.opentelemetry.io/otel/sdk/internal/x
go.opentelemetry.io/otel/sdk/resource
go.opentelemetry.io/otel/sdk/trace
go.opentelemetry.io/otel/sdk/trace/tracetest
# go.opentelemetry.io/otel/sdk/metric v1.37.0
## explicit; go 1.23.0
go.opentelemetry.io/otel/sdk/metric