[StatsD receiver] Add timing/histogram for statsD receiver as OTLP summary

go.sum

@@ -1156,6 +1156,7 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe h1:iruDEfMl2E6fbMZ9s0scYfZQ84/6SPL6zC8ACM2oIL0=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
 github.com/moricho/tparallel v0.2.1/go.mod h1:fXEIZxG2vdfl0ZF8b42f5a78EhjjD5mX8qUplsoSU4k=
 github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=

receiver/statsdreceiver/README.md

@@ -23,14 +23,12 @@ The Following settings are optional:
 
 - `timer_histogram_mapping:`(default value is below): Specify what OTLP type to convert received timing/histogram data to.
 
-// TODO: can add regex support for `match` later.
-
-`"match"`, we only support `"*"` now. 
 
 `"statsd_type"` specifies received Statsd data type. Possible values for this setting are `"timing"`, `"timer"` and `"histogram"`.
 
-`"observer_type"` specifies OTLP data type to convert to. The only supported target data type currently is `"gauge"`, which does not perform any aggregation.
-Support for `"summary"` data type is planned to be added in the future.
+`"observer_type"` specifies OTLP data type to convert to. We support `"gauge"` and `"summary"`. For `"gauge"`, it does not perform any aggregation.
+For `"summary`, the statsD receiver will aggregate to one OTLP summary metric for one metric description(the same metric name with the same tags). It will send percentile 0, 10, 50, 90, 95, 100 to the downstream. 
+TODO: Add a new option to use a smoothed summary like Promethetheus: https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/3261 
 
 Example:
 
@@ -42,11 +40,9 @@ receivers:
     aggregation_interval: 70s
     enable_metric_type: true
     timer_histogram_mapping:
-      - match: "*"
-        statsd_type: "histogram"
+      - statsd_type: "histogram"
         observer_type: "gauge"
-      - match: "*"
-        statsd_type: "timing"
+      - statsd_type: "timing"
         observer_type: "gauge"
 ```
 
@@ -120,11 +116,9 @@ receivers:
     aggregation_interval: 60s  # default
     enable_metric_type: false   # default
     timer_histogram_mapping:
-      - match: "*"
-        statsd_type: "histogram"
+      - statsd_type: "histogram"
         observer_type: "gauge"
-      - match: "*"
-        statsd_type: "timing"
+      - statsd_type: "timing"
         observer_type: "gauge"
 
 exporters:

receiver/statsdreceiver/config.go

@@ -37,24 +37,15 @@ type Config struct {
 func (c *Config) validate() error {
 
 	var errors []error
-	supportMatch := []string{"*"}
 	supportedStatsdType := []string{"timing", "timer", "histogram"}
-	supportedObserverType := []string{"gauge"}
+	supportedObserverType := []string{"gauge", "summary"}
 
 	if c.AggregationInterval <= 0 {
 		errors = append(errors, fmt.Errorf("aggregation_interval must be a positive duration"))
 	}
 
 	var TimerHistogramMappingMissingObjectName bool
 	for _, eachMap := range c.TimerHistogramMapping {
-		if eachMap.Match == "" {
-			TimerHistogramMappingMissingObjectName = true
-			break
-		}
-
-		if !protocol.Contains(supportMatch, eachMap.Match) {
-			errors = append(errors, fmt.Errorf("match is not supported: %s", eachMap.Match))
-		}
 
 		if eachMap.StatsdType == "" {
 			TimerHistogramMappingMissingObjectName = true

receiver/statsdreceiver/config_test.go

@@ -59,7 +59,7 @@ func TestLoadConfig(t *testing.T) {
 			Transport: "custom_transport",
 		},
 		AggregationInterval:   70 * time.Second,
-		TimerHistogramMapping: []protocol.TimerHistogramMapping{{Match: "*", StatsdType: "histogram", ObserverType: "gauge"}, {Match: "*", StatsdType: "timing", ObserverType: "gauge"}},
+		TimerHistogramMapping: []protocol.TimerHistogramMapping{{StatsdType: "histogram", ObserverType: "gauge"}, {StatsdType: "timing", ObserverType: "gauge"}},
 	}, r1)
 }
 
@@ -73,7 +73,6 @@ func TestValidate(t *testing.T) {
 	const (
 		negativeAggregationIntervalErr = "aggregation_interval must be a positive duration"
 		noObjectNameErr                = "must specify object name for all TimerHistogramMappings"
-		matchNotSupportErr             = "match is not supported: %s"
 		statsdTypeNotSupportErr        = "statsd_type is not supported: %s"
 		observerTypeNotSupportErr      = "observer_type is not supported: %s"
 	)
@@ -83,28 +82,18 @@ func TestValidate(t *testing.T) {
 			name: "negativeAggregationInterval",
 			cfg: &Config{
 				AggregationInterval: -1,
-				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "*", StatsdType: "timing", ObserverType: "gauge"},
-				},
-			},
-			expectedErr: negativeAggregationIntervalErr,
-		},
-		{
-			name: "emptyMatch",
-			cfg: &Config{
-				AggregationInterval: 10,
 				TimerHistogramMapping: []protocol.TimerHistogramMapping{
 					{StatsdType: "timing", ObserverType: "gauge"},
 				},
 			},
-			expectedErr: noObjectNameErr,
+			expectedErr: negativeAggregationIntervalErr,
 		},
 		{
 			name: "emptyStatsdType",
 			cfg: &Config{
 				AggregationInterval: 10,
 				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "*", ObserverType: "gauge"},
+					{ObserverType: "gauge"},
 				},
 			},
 			expectedErr: noObjectNameErr,
@@ -114,27 +103,17 @@ func TestValidate(t *testing.T) {
 			cfg: &Config{
 				AggregationInterval: 10,
 				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "*", StatsdType: "timing"},
+					{StatsdType: "timing"},
 				},
 			},
 			expectedErr: noObjectNameErr,
 		},
-		{
-			name: "MatchNotSupport",
-			cfg: &Config{
-				AggregationInterval: 10,
-				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "aaa", StatsdType: "timing", ObserverType: "gauge"},
-				},
-			},
-			expectedErr: fmt.Sprintf(matchNotSupportErr, "aaa"),
-		},
 		{
 			name: "StatsdTypeNotSupport",
 			cfg: &Config{
 				AggregationInterval: 10,
 				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "*", StatsdType: "abc", ObserverType: "gauge"},
+					{StatsdType: "abc", ObserverType: "gauge"},
 				},
 			},
 			expectedErr: fmt.Sprintf(statsdTypeNotSupportErr, "abc"),
@@ -144,7 +123,7 @@ func TestValidate(t *testing.T) {
 			cfg: &Config{
 				AggregationInterval: 10,
 				TimerHistogramMapping: []protocol.TimerHistogramMapping{
-					{Match: "*", StatsdType: "timer", ObserverType: "gauge1"},
+					{StatsdType: "timer", ObserverType: "gauge1"},
 				},
 			},
 			expectedErr: fmt.Sprintf(observerTypeNotSupportErr, "gauge1"),

receiver/statsdreceiver/factory.go

@@ -36,6 +36,10 @@ const (
 	defaultEnableMetricType    = false
 )
 
+var (
+	defaultTimerHistogramMapping = []protocol.TimerHistogramMapping{{StatsdType: "timer", ObserverType: "gauge"}, {StatsdType: "histogram", ObserverType: "gauge"}}
+)
+
 // NewFactory creates a factory for the StatsD receiver.
 func NewFactory() component.ReceiverFactory {
 	return receiverhelper.NewFactory(
@@ -57,7 +61,7 @@ func createDefaultConfig() config.Receiver {
 		},
 		AggregationInterval:   defaultAggregationInterval,
 		EnableMetricType:      defaultEnableMetricType,
-		TimerHistogramMapping: []protocol.TimerHistogramMapping{{Match: "*", StatsdType: "timer", ObserverType: "gauge"}, {Match: "*", StatsdType: "histogram", ObserverType: "gauge"}},
+		TimerHistogramMapping: defaultTimerHistogramMapping,
 	}
 }
 

receiver/statsdreceiver/factory_test.go

@@ -48,7 +48,7 @@ func TestCreateReceiverWithConfigErr(t *testing.T) {
 	cfg := &Config{
 		AggregationInterval: -1,
 		TimerHistogramMapping: []protocol.TimerHistogramMapping{
-			{Match: "*", StatsdType: "timing", ObserverType: "gauge"},
+			{StatsdType: "timing", ObserverType: "gauge"},
 		},
 	}
 	receiver, err := createMetricsReceiver(

receiver/statsdreceiver/go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/hashicorp/go-immutable-radix v1.2.0 // indirect
 	github.com/hashicorp/go-msgpack v0.5.5 // indirect
 	github.com/mattn/go-colorable v0.1.7 // indirect
+	github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe
 	github.com/onsi/ginkgo v1.14.1 // indirect
 	github.com/onsi/gomega v1.10.2 // indirect
 	github.com/pelletier/go-toml v1.8.0 // indirect

receiver/statsdreceiver/go.sum

@@ -750,6 +750,7 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe h1:iruDEfMl2E6fbMZ9s0scYfZQ84/6SPL6zC8ACM2oIL0=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
 github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=

receiver/statsdreceiver/protocol/metric_translator.go

@@ -17,6 +17,7 @@ package protocol
 import (
 	"time"
 
+	"github.com/montanaflynn/stats"
 	"go.opentelemetry.io/collector/consumer/pdata"
 )
 
@@ -58,3 +59,31 @@ func buildGaugeMetric(parsedMetric statsDMetric, timeNow time.Time) pdata.Instru
 
 	return ilm
 }
+
+func buildSummaryMetric(summaryMetric summaryMetric) pdata.InstrumentationLibraryMetrics {
+	dp := pdata.NewSummaryDataPoint()
+	dp.SetCount(uint64(len(summaryMetric.summaryPoints)))
+	sum, _ := stats.Sum(summaryMetric.summaryPoints)
+	dp.SetSum(sum)
+	dp.SetTimestamp(pdata.TimestampFromTime(summaryMetric.timeNow))
+
+	quantile := []float64{0, 10, 50, 90, 95, 100}
+	for _, v := range quantile {
+		eachQuantile := pdata.NewValueAtQuantile()
+		eachQuantile.SetQuantile(v)
+		eachQuantileValue, _ := stats.PercentileNearestRank(summaryMetric.summaryPoints, v)
+		eachQuantile.SetValue(eachQuantileValue)
+		dp.QuantileValues().Append(eachQuantile)
+	}
+
+	nm := pdata.NewMetric()
+	nm.SetName(summaryMetric.name)
+	nm.SetDataType(pdata.MetricDataTypeSummary)
+	nm.Summary().DataPoints().Append(dp)
+
+	ilm := pdata.NewInstrumentationLibraryMetrics()
+	ilm.Metrics().Append(nm)
+
+	return ilm
+
+}

receiver/statsdreceiver/protocol/metric_translator_test.go

@@ -74,3 +74,37 @@ func TestBuildGaugeMetric(t *testing.T) {
 	dp.LabelsMap().Insert("mykey2", "myvalue2")
 	assert.Equal(t, metric, expectedMetrics)
 }
+
+func TestBuildSummaryMetric(t *testing.T) {
+	timeNow := time.Now()
+
+	oneSummaryMetric := summaryMetric{
+		name:          "testSummary",
+		summaryPoints: []float64{1, 2, 4, 6, 5, 3},
+		labelKeys:     []string{"mykey", "mykey2"},
+		labelValues:   []string{"myvalue", "myvalue2"},
+		timeNow:       timeNow,
+	}
+
+	metric := buildSummaryMetric(oneSummaryMetric)
+	expectedMetric := pdata.NewInstrumentationLibraryMetrics()
+	expectedMetric.Metrics().Resize(1)
+	expectedMetric.Metrics().At(0).SetName("testSummary")
+	expectedMetric.Metrics().At(0).SetDataType(pdata.MetricDataTypeSummary)
+	expectedMetric.Metrics().At(0).Summary().DataPoints().Resize(1)
+	expectedMetric.Metrics().At(0).Summary().DataPoints().At(0).SetSum(21)
+	expectedMetric.Metrics().At(0).Summary().DataPoints().At(0).SetCount(6)
+	expectedMetric.Metrics().At(0).Summary().DataPoints().At(0).SetTimestamp(pdata.TimestampFromTime(timeNow))
+	quantile := []float64{0, 10, 50, 90, 95, 100}
+	value := []float64{1, 1, 3, 6, 6, 6}
+	for int, v := range quantile {
+		eachQuantile := pdata.NewValueAtQuantile()
+		eachQuantile.SetQuantile(v)
+		eachQuantileValue := value[int]
+		eachQuantile.SetValue(eachQuantileValue)
+		expectedMetric.Metrics().At(0).Summary().DataPoints().At(0).QuantileValues().Append(eachQuantile)
+	}
+
+	assert.Equal(t, metric, expectedMetric)
+
+}

receiver/statsdreceiver/protocol/statsd_parser.go

@@ -43,7 +43,6 @@ const (
 )
 
 type TimerHistogramMapping struct {
-	Match        string `mapstructure:"match"`
 	StatsdType   string `mapstructure:"statsd_type"`
 	ObserverType string `mapstructure:"observer_type"`
 }
@@ -52,12 +51,21 @@ type TimerHistogramMapping struct {
 type StatsDParser struct {
 	gauges                 map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics
 	counters               map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics
+	summaries              map[statsDMetricdescription]summaryMetric
 	timersAndDistributions []pdata.InstrumentationLibraryMetrics
 	enableMetricType       bool
 	observeTimer           string
 	observeHistogram       string
 }
 
+type summaryMetric struct {
+	name          string
+	summaryPoints []float64
+	labelKeys     []string
+	labelValues   []string
+	timeNow       time.Time
+}
+
 type statsDMetric struct {
 	description statsDMetricdescription
 	value       string
@@ -80,6 +88,8 @@ func (p *StatsDParser) Initialize(enableMetricType bool, sendTimerHistogram []Ti
 	p.gauges = make(map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics)
 	p.counters = make(map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics)
 	p.timersAndDistributions = make([]pdata.InstrumentationLibraryMetrics, 0)
+	p.summaries = make(map[statsDMetricdescription]summaryMetric)
+
 	p.enableMetricType = enableMetricType
 	for _, eachMap := range sendTimerHistogram {
 		switch eachMap.StatsdType {
@@ -109,10 +119,14 @@ func (p *StatsDParser) GetMetrics() pdata.Metrics {
 		rm.InstrumentationLibraryMetrics().Append(metric)
 	}
 
+	for _, summaryMetric := range p.summaries {
+		metrics.ResourceMetrics().At(0).InstrumentationLibraryMetrics().Append(buildSummaryMetric(summaryMetric))
+	}
+
 	p.gauges = make(map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics)
 	p.counters = make(map[statsDMetricdescription]pdata.InstrumentationLibraryMetrics)
 	p.timersAndDistributions = make([]pdata.InstrumentationLibraryMetrics, 0)
-
+	p.summaries = make(map[statsDMetricdescription]summaryMetric)
 	return metrics
 }
 
@@ -155,12 +169,52 @@ func (p *StatsDParser) Aggregate(line string) error {
 		switch p.observeHistogram {
 		case "gauge":
 			p.timersAndDistributions = append(p.timersAndDistributions, buildGaugeMetric(parsedMetric, timeNowFunc()))
+		case "summary":
+			eachSummaryMetric, ok := p.summaries[parsedMetric.description]
+			if !ok {
+				p.summaries[parsedMetric.description] = summaryMetric{
+					name:          parsedMetric.description.name,
+					summaryPoints: []float64{parsedMetric.floatvalue},
+					labelKeys:     parsedMetric.labelKeys,
+					labelValues:   parsedMetric.labelValues,
+					timeNow:       timeNowFunc(),
+				}
+			} else {
+				points := eachSummaryMetric.summaryPoints
+				p.summaries[parsedMetric.description] = summaryMetric{
+					name:          parsedMetric.description.name,
+					summaryPoints: append(points, parsedMetric.floatvalue),
+					labelKeys:     parsedMetric.labelKeys,
+					labelValues:   parsedMetric.labelValues,
+					timeNow:       timeNowFunc(),
+				}
+			}
 		}
 
 	case statsdTiming:
 		switch p.observeTimer {
 		case "gauge":
 			p.timersAndDistributions = append(p.timersAndDistributions, buildGaugeMetric(parsedMetric, timeNowFunc()))
+		case "summary":
+			eachSummaryMetric, ok := p.summaries[parsedMetric.description]
+			if !ok {
+				p.summaries[parsedMetric.description] = summaryMetric{
+					name:          parsedMetric.description.name,
+					summaryPoints: []float64{parsedMetric.floatvalue},
+					labelKeys:     parsedMetric.labelKeys,
+					labelValues:   parsedMetric.labelValues,
+					timeNow:       timeNowFunc(),
+				}
+			} else {
+				points := eachSummaryMetric.summaryPoints
+				p.summaries[parsedMetric.description] = summaryMetric{
+					name:          parsedMetric.description.name,
+					summaryPoints: append(points, parsedMetric.floatvalue),
+					labelKeys:     parsedMetric.labelKeys,
+					labelValues:   parsedMetric.labelValues,
+					timeNow:       timeNowFunc(),
+				}
+			}
 		}
 	}