Revert Adding attributes to the instrumentation scope.

Revert "Add instrumentation scope attributes (#3131)" (#3154)

This reverts commit 0078fae.

Revert "Add WithScopeAttributes MeterOption to metric API package (#3132)"

This reverts commit 81a9bab.

CHANGELOG.md

@@ -14,9 +14,6 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   Include compatibility testing and document support. (#3077)
 - Support the OTLP ExportTracePartialSuccess response; these are passed to the registered error handler. (#3106)
 - Upgrade go.opentelemetry.io/proto/otlp from v0.18.0 to v0.19.0 (#3107)
-- Add an `Attribute` field to the `Scope` type in `go.opentelemetry.io/otel/sdk/instrumentation`. (#3131)
-- Add the `WithScopeAttributes` `TracerOption` to the `go.opentelemetry.io/otel/trace` package. (#3131)
-- Add the `WithScopeAttributes` `MeterOption` to the `go.opentelemetry.io/otel/metric` package. (#3132)
 
 ### Changed
 
@@ -25,7 +22,6 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   exact upper-inclusive boundary support following the [corresponding
   specification change](https://github.com/open-telemetry/opentelemetry-specification/pull/2633). (#2982)
 - Attempting to start a span with a nil `context` will no longer cause a panic. (#3110)
-- Export scope attributes for all exporters provided by `go.opentelemetry.io/otel/exporters/otlp/otlptrace`. (#3131)
 
 ## [1.9.0/0.0.3] - 2022-08-01
 

exporters/otlp/otlptrace/internal/tracetransform/instrumentation.go

@@ -24,8 +24,7 @@ func InstrumentationScope(il instrumentation.Scope) *commonpb.InstrumentationSco
 		return nil
 	}
 	return &commonpb.InstrumentationScope{
-		Name:       il.Name,
-		Version:    il.Version,
-		Attributes: Iterator(il.Attributes.Iter()),
+		Name:    il.Name,
+		Version: il.Version,
 	}
 }

exporters/stdout/stdouttrace/trace_test.go

@@ -186,8 +186,7 @@ func expectedJSON(now time.Time) string {
 	"InstrumentationLibrary": {
 		"Name": "",
 		"Version": "",
-		"SchemaURL": "",
-		"Attributes": null
+		"SchemaURL": ""
 	}
 }
 `

metric/config.go

@@ -14,13 +14,10 @@
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
-import "go.opentelemetry.io/otel/attribute"
-
 // MeterConfig contains options for Meters.
 type MeterConfig struct {
 	instrumentationVersion string
 	schemaURL              string
-	attributes             attribute.Set
 }
 
 // InstrumentationVersion is the version of the library providing instrumentation.
@@ -33,11 +30,6 @@ func (cfg MeterConfig) SchemaURL() string {
 	return cfg.schemaURL
 }
 
-// Attributes returns the scope attribute set of the Meter.
-func (t MeterConfig) Attributes() attribute.Set {
-	return t.attributes
-}
-
 // MeterOption is an interface for applying Meter options.
 type MeterOption interface {
 	// applyMeter is used to set a MeterOption value of a MeterConfig.
@@ -75,13 +67,3 @@ func WithSchemaURL(schemaURL string) MeterOption {
 		return config
 	})
 }
-
-// WithScopeAttributes sets the attributes for the scope of a Meter. The
-// attributes are stored as an attribute set. Duplicate values are removed, the
-// last value is used.
-func WithScopeAttributes(attr ...attribute.KeyValue) MeterOption {
-	return meterOptionFunc(func(cfg MeterConfig) MeterConfig {
-		cfg.attributes = attribute.NewSet(attr...)
-		return cfg
-	})
-}

metric/meter.go

@@ -24,50 +24,15 @@ import (
 	"go.opentelemetry.io/otel/metric/instrument/syncint64"
 )
 
-// MeterProvider provides Meters that are used by instrumentation code to
-// create instruments that measure code operations.
-//
-// A MeterProvider is the collection destination of all measurements made from
-// instruments the provided Meters created, it represents a unique telemetry
-// collection pipeline. How that pipeline is defined, meaning how those
-// measurements are collected, processed, and where they are exported, depends
-// on its implementation. Instrumentation authors do not need to define this
-// implementation, rather just use the provided Meters to instrument code.
-//
-// Commonly, instrumentation code will accept a MeterProvider implementation at
-// runtime from its users or it can simply use the globally registered one (see
-// https://pkg.go.dev/go.opentelemetry.io/otel/metric/global#MeterProvider).
-//
-// Warning: methods may be added to this interface in minor releases.
+// MeterProvider provides access to named Meter instances, for instrumenting
+// an application or library.
 type MeterProvider interface {
-	// Meter returns a unique Meter scoped to be used by instrumentation code
-	// to measure code operations. The scope and identity of that
-	// instrumentation code is uniquely defined by the name and options passed.
-	//
-	// The passed name needs to uniquely identify instrumentation code.
-	// Therefore, it is recommended that name is the Go package name of the
-	// library providing instrumentation (note: not the code being
-	// instrumented). Instrumentation libraries can have multiple versions,
-	// therefore, the WithInstrumentationVersion option should be used to
-	// distinguish these different codebases. Additionally, instrumentation
-	// libraries may sometimes use metric measurements to communicate different
-	// domains of code operations data (i.e. using different Meters to
-	// communicate user experience and back-end operations). If this is the
-	// case, the WithScopeAttributes option should be used to uniquely identify
-	// Meters that handle the different domains of code operations data.
-	//
-	// If the same name and options are passed multiple times, the same Meter
-	// will be returned (it is up to the implementation if this will be the
-	// same underlying instance of that Meter or not). It is not necessary to
-	// call this multiple times with the same name and options to get an
-	// up-to-date Meter. All implementations will ensure any MeterProvider
-	// configuration changes are propagated to all provided Meters.
-	//
-	// If name is empty, then an implementation defined default name will be
-	// used instead.
-	//
-	// This method is safe to call concurrently.
-	Meter(name string, options ...MeterOption) Meter
+	// Meter creates an instance of a `Meter` interface. The instrumentationName
+	// must be the name of the library providing instrumentation. This name may
+	// be the same as the instrumented code only if that code provides built-in
+	// instrumentation. If the instrumentationName is empty, then a
+	// implementation defined default name will be used instead.
+	Meter(instrumentationName string, opts ...MeterOption) Meter
 }
 
 // Meter provides access to instrument instances for recording metrics.

sdk/instrumentation/scope.go

@@ -14,14 +14,7 @@
 
 package instrumentation // import "go.opentelemetry.io/otel/sdk/instrumentation"
 
-import "go.opentelemetry.io/otel/attribute"
-
-// Scope represents the instrumentation source of OpenTelemetry data.
-//
-// Code that uses OpenTelemetry APIs or data-models to produce telemetry needs
-// to be identifiable by the receiver of that data. A Scope is used for this
-// purpose, it uniquely identifies that code as the source and the extent to
-// which it is relevant.
+// Scope represents the instrumentation scope.
 type Scope struct {
 	// Name is the name of the instrumentation scope. This should be the
 	// Go package name of that scope.
@@ -30,13 +23,4 @@ type Scope struct {
 	Version string
 	// SchemaURL of the telemetry emitted by the scope.
 	SchemaURL string
-	// Attributes describe the unique attributes of an instrumentation scope.
-	//
-	// These attributes are used to differentiate an instrumentation scope when
-	// it emits data that belong to different domains. For example, if both
-	// profiling data and client-side data are emitted as log records from the
-	// same instrumentation library, they may need to be differentiated by a
-	// telemetry receiver. In that case, these attributes are used to scope and
-	// differentiate the data.
-	Attributes attribute.Set
 }

sdk/trace/provider.go

@@ -142,10 +142,9 @@ func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.T
 		name = defaultTracerName
 	}
 	is := instrumentation.Scope{
-		Name:       name,
-		Version:    c.InstrumentationVersion(),
-		SchemaURL:  c.SchemaURL(),
-		Attributes: c.Attributes(),
+		Name:      name,
+		Version:   c.InstrumentationVersion(),
+		SchemaURL: c.SchemaURL(),
 	}
 	t, ok := p.namedTracer[is]
 	if !ok {
@@ -154,13 +153,7 @@ func (p *TracerProvider) Tracer(name string, opts ...trace.TracerOption) trace.T
 			instrumentationScope: is,
 		}
 		p.namedTracer[is] = t
-		global.Info(
-			"Tracer created",
-			"name", name,
-			"version", c.InstrumentationVersion(),
-			"schemaURL", c.SchemaURL(),
-			"attributes", c.Attributes(),
-		)
+		global.Info("Tracer created", "name", name, "version", c.InstrumentationVersion(), "schemaURL", c.SchemaURL())
 	}
 	return t
 }

sdk/trace/trace_test.go

@@ -911,8 +911,6 @@ func TestSetSpanStatusWithoutMessageWhenStatusIsNotError(t *testing.T) {
 func cmpDiff(x, y interface{}) string {
 	return cmp.Diff(x, y,
 		cmp.AllowUnexported(snapshot{}),
-		cmp.AllowUnexported(attribute.Set{}),
-		cmp.AllowUnexported(attribute.Distinct{}),
 		cmp.AllowUnexported(attribute.Value{}),
 		cmp.AllowUnexported(Event{}),
 		cmp.AllowUnexported(trace.TraceState{}))

trace/config.go

@@ -24,8 +24,7 @@ import (
 type TracerConfig struct {
 	instrumentationVersion string
 	// Schema URL of the telemetry emitted by the Tracer.
-	schemaURL  string
-	attributes attribute.Set
+	schemaURL string
 }
 
 // InstrumentationVersion returns the version of the library providing instrumentation.
@@ -38,11 +37,6 @@ func (t *TracerConfig) SchemaURL() string {
 	return t.schemaURL
 }
 
-// Attributes returns the scope attribute set of the Tracer.
-func (t *TracerConfig) Attributes() attribute.Set {
-	return t.attributes
-}
-
 // NewTracerConfig applies all the options to a returned TracerConfig.
 func NewTracerConfig(options ...TracerOption) TracerConfig {
 	var config TracerConfig
@@ -320,13 +314,3 @@ func WithSchemaURL(schemaURL string) TracerOption {
 		return cfg
 	})
 }
-
-// WithScopeAttributes sets the attributes for the scope of a Tracer. The
-// attributes are stored as an attribute set. Duplicate values are removed, the
-// last value is used.
-func WithScopeAttributes(attr ...attribute.KeyValue) TracerOption {
-	return tracerOptionFunc(func(cfg TracerConfig) TracerConfig {
-		cfg.attributes = attribute.NewSet(attr...)
-		return cfg
-	})
-}

trace/config_test.go

@@ -211,7 +211,6 @@ func TestTracerConfig(t *testing.T) {
 	v1 := "semver:0.0.1"
 	v2 := "semver:1.0.0"
 	schemaURL := "https://opentelemetry.io/schemas/1.2.0"
-	one, two := attribute.Int("key", 1), attribute.Int("key", 2)
 	tests := []struct {
 		options  []TracerOption
 		expected TracerConfig
@@ -247,24 +246,6 @@ func TestTracerConfig(t *testing.T) {
 				schemaURL: schemaURL,
 			},
 		},
-
-		{
-			[]TracerOption{
-				WithScopeAttributes(one, two),
-			},
-			TracerConfig{
-				attributes: attribute.NewSet(two),
-			},
-		},
-		{
-			[]TracerOption{
-				WithScopeAttributes(two),
-				WithScopeAttributes(one),
-			},
-			TracerConfig{
-				attributes: attribute.NewSet(one),
-			},
-		},
 	}
 	for _, test := range tests {
 		config := NewTracerConfig(test.options...)