Pass metric labels when transforming to gaugeArray (#1570)

* Pass metric labels when transforming to gaugeArray

* Update CHANGELOG.md

* Update CHANGELOG.md

Co-authored-by: Tyler Yahn <[email protected]>

* Add label requirements to transformed metric assertions

* Fix fmting

Co-authored-by: Tyler Yahn <[email protected]>

Author: terev

CHANGELOG.md

@@ -50,6 +50,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Windows build of Jaeger tests now compiles with OS specific functions (#1576). (#1577)
 - The sequential timing check of timestamps of go.opentelemetry.io/otel/sdk/metric/aggregator/lastvalue are now setup explicitly to be sequential (#1578). (#1579)
 - Validate tracestate header keys with vedors according to the W3C TraceContext specification (#1475). (#1581)
+- The OTLP exporter includes related labels for translations of a GaugeArray (#1563). (#1570)
 
 ## [0.17.0] - 2020-02-12
 

exporters/otlp/internal/transform/metric.go

@@ -308,18 +308,21 @@ func Record(exportSelector export.ExportKindSelector, r export.Record) (*metricp
 
 func gaugeArray(record export.Record, points []aggregation.Point) (*metricpb.Metric, error) {
 	desc := record.Descriptor()
+	labels := record.Labels()
 	m := &metricpb.Metric{
 		Name:        desc.Name(),
 		Description: desc.Description(),
 		Unit:        string(desc.Unit()),
 	}
 
+	pbLabels := stringKeyValues(labels.Iter())
+
 	switch nk := desc.NumberKind(); nk {
 	case number.Int64Kind:
 		var pts []*metricpb.IntDataPoint
 		for _, s := range points {
 			pts = append(pts, &metricpb.IntDataPoint{
-				Labels:            nil,
+				Labels:            pbLabels,
 				StartTimeUnixNano: toNanos(record.StartTime()),
 				TimeUnixNano:      toNanos(record.EndTime()),
 				Value:             s.Number.CoerceToInt64(nk),
@@ -335,7 +338,7 @@ func gaugeArray(record export.Record, points []aggregation.Point) (*metricpb.Met
 		var pts []*metricpb.DoubleDataPoint
 		for _, s := range points {
 			pts = append(pts, &metricpb.DoubleDataPoint{
-				Labels:            nil,
+				Labels:            pbLabels,
 				StartTimeUnixNano: toNanos(record.StartTime()),
 				TimeUnixNano:      toNanos(record.EndTime()),
 				Value:             s.Number.CoerceToFloat64(nk),

exporters/otlp/internal/transform/metric_test.go

@@ -123,7 +123,7 @@ func TestMinMaxSumCountValue(t *testing.T) {
 
 func TestMinMaxSumCountDatapoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Int64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	mmsc, ckpt := metrictest.Unslice2(minmaxsumcount.New(2, &desc))
 
 	assert.NoError(t, mmsc.Update(context.Background(), 1, &desc))
@@ -137,6 +137,12 @@ func TestMinMaxSumCountDatapoints(t *testing.T) {
 			BucketCounts:      []uint64{1, 10},
 			StartTimeUnixNano: uint64(intervalStart.UnixNano()),
 			TimeUnixNano:      uint64(intervalEnd.UnixNano()),
+			Labels: []*commonpb.StringKeyValue{
+				{
+					Key:   "one",
+					Value: "1",
+				},
+			},
 		},
 	}
 	record := export.NewRecord(&desc, &labels, nil, ckpt.Aggregation(), intervalStart, intervalEnd)
@@ -162,7 +168,7 @@ func TestMinMaxSumCountPropagatesErrors(t *testing.T) {
 
 func TestSumIntDataPoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Int64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	s, ckpt := metrictest.Unslice2(sumAgg.New(2))
 	assert.NoError(t, s.Update(context.Background(), number.Number(1), &desc))
 	require.NoError(t, s.SynchronizedMove(ckpt, &desc))
@@ -182,6 +188,12 @@ func TestSumIntDataPoints(t *testing.T) {
 				Value:             1,
 				StartTimeUnixNano: uint64(intervalStart.UnixNano()),
 				TimeUnixNano:      uint64(intervalEnd.UnixNano()),
+				Labels: []*commonpb.StringKeyValue{
+					{
+						Key:   "one",
+						Value: "1",
+					},
+				},
 			}}}, m.GetIntSum())
 		assert.Nil(t, m.GetDoubleGauge())
 		assert.Nil(t, m.GetDoubleHistogram())
@@ -190,7 +202,7 @@ func TestSumIntDataPoints(t *testing.T) {
 
 func TestSumFloatDataPoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Float64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	s, ckpt := metrictest.Unslice2(sumAgg.New(2))
 	assert.NoError(t, s.Update(context.Background(), number.NewFloat64Number(1), &desc))
 	require.NoError(t, s.SynchronizedMove(ckpt, &desc))
@@ -213,13 +225,19 @@ func TestSumFloatDataPoints(t *testing.T) {
 				Value:             1,
 				StartTimeUnixNano: uint64(intervalStart.UnixNano()),
 				TimeUnixNano:      uint64(intervalEnd.UnixNano()),
+				Labels: []*commonpb.StringKeyValue{
+					{
+						Key:   "one",
+						Value: "1",
+					},
+				},
 			}}}, m.GetDoubleSum())
 	}
 }
 
 func TestLastValueIntDataPoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Int64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	s, ckpt := metrictest.Unslice2(lvAgg.New(2))
 	assert.NoError(t, s.Update(context.Background(), number.Number(100), &desc))
 	require.NoError(t, s.SynchronizedMove(ckpt, &desc))
@@ -234,6 +252,12 @@ func TestLastValueIntDataPoints(t *testing.T) {
 			Value:             100,
 			StartTimeUnixNano: 0,
 			TimeUnixNano:      uint64(timestamp.UnixNano()),
+			Labels: []*commonpb.StringKeyValue{
+				{
+					Key:   "one",
+					Value: "1",
+				},
+			},
 		}}, m.GetIntGauge().DataPoints)
 		assert.Nil(t, m.GetIntHistogram())
 		assert.Nil(t, m.GetIntSum())
@@ -245,7 +269,7 @@ func TestLastValueIntDataPoints(t *testing.T) {
 
 func TestExactIntDataPoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Int64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	e, ckpt := metrictest.Unslice2(arrAgg.New(2))
 	assert.NoError(t, e.Update(context.Background(), number.Number(100), &desc))
 	require.NoError(t, e.SynchronizedMove(ckpt, &desc))
@@ -260,6 +284,12 @@ func TestExactIntDataPoints(t *testing.T) {
 			Value:             100,
 			StartTimeUnixNano: toNanos(intervalStart),
 			TimeUnixNano:      toNanos(intervalEnd),
+			Labels: []*commonpb.StringKeyValue{
+				{
+					Key:   "one",
+					Value: "1",
+				},
+			},
 		}}, m.GetIntGauge().DataPoints)
 		assert.Nil(t, m.GetIntHistogram())
 		assert.Nil(t, m.GetIntSum())
@@ -271,7 +301,7 @@ func TestExactIntDataPoints(t *testing.T) {
 
 func TestExactFloatDataPoints(t *testing.T) {
 	desc := metric.NewDescriptor("", metric.ValueRecorderInstrumentKind, number.Float64Kind)
-	labels := attribute.NewSet()
+	labels := attribute.NewSet(attribute.String("one", "1"))
 	e, ckpt := metrictest.Unslice2(arrAgg.New(2))
 	assert.NoError(t, e.Update(context.Background(), number.NewFloat64Number(100), &desc))
 	require.NoError(t, e.SynchronizedMove(ckpt, &desc))
@@ -286,6 +316,12 @@ func TestExactFloatDataPoints(t *testing.T) {
 			Value:             100,
 			StartTimeUnixNano: toNanos(intervalStart),
 			TimeUnixNano:      toNanos(intervalEnd),
+			Labels: []*commonpb.StringKeyValue{
+				{
+					Key:   "one",
+					Value: "1",
+				},
+			},
 		}}, m.GetDoubleGauge().DataPoints)
 		assert.Nil(t, m.GetIntHistogram())
 		assert.Nil(t, m.GetIntSum())