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[pkg/otlp/metrics] Add telemetry metric counting the number of missin…
…g sources (#220) * [pkg/otlp/metrics] Add telemetry metric counting the number of missing sources * Add changelog PR number * genlicenses * Address feedback
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| Original file line number | Diff line number | Diff line change |
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| # One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix' | ||
| change_type: enhancement | ||
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| # The name of the component (e.g. pkg/quantile) | ||
| component: pkg/otlp/metric | ||
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| # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). | ||
| note: Add `datadog.otlp_translator.metrics.missing_source` counter, which counts the number of metrics that are missing a source (e.g. hostname). | ||
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| # The PR related to this change | ||
| issues: [220] | ||
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| # (Optional) One or more lines of additional information to render under the primary note. | ||
| # These lines will be padded with 2 spaces and then inserted directly into the document. | ||
| # Use pipe (|) for multiline entries. | ||
| subtext: |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2022-present Datadog, Inc. | ||
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| package metrics | ||
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| import ( | ||
| "context" | ||
| "testing" | ||
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| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| "go.opentelemetry.io/collector/component/componenttest" | ||
| sdkmetric "go.opentelemetry.io/otel/sdk/metric" | ||
| "go.opentelemetry.io/otel/sdk/metric/metricdata" | ||
| ) | ||
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| // deltaSelector sets delta aggregation temporality for monotonic counters and histograms. | ||
| func deltaSelector(kind sdkmetric.InstrumentKind) metricdata.Temporality { | ||
| switch kind { | ||
| case sdkmetric.InstrumentKindCounter, | ||
| sdkmetric.InstrumentKindHistogram, | ||
| sdkmetric.InstrumentKindObservableGauge, | ||
| sdkmetric.InstrumentKindObservableCounter: | ||
| return metricdata.DeltaTemporality | ||
| case sdkmetric.InstrumentKindUpDownCounter, | ||
| sdkmetric.InstrumentKindObservableUpDownCounter: | ||
| return metricdata.CumulativeTemporality | ||
| } | ||
| panic("unknown instrument kind") | ||
| } | ||
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| // AssertHasSumMetric asserts that an OTLP metrics payload has | ||
| // a single sum metric with a single datapoint and with the given name and value. | ||
| func AssertHasSumMetric[N int64 | float64](t *testing.T, rm *metricdata.ResourceMetrics, name string, value int64) { | ||
| var found bool | ||
| for _, scopeMetric := range rm.ScopeMetrics { | ||
| for _, metric := range scopeMetric.Metrics { | ||
| if metric.Name == name { | ||
| if !found { | ||
| assert.Len(t, metric.Data.(metricdata.Sum[N]).DataPoints, 1) | ||
| assert.Equal(t, value, metric.Data.(metricdata.Sum[N]).DataPoints[0].Value) | ||
| found = true | ||
| } else { | ||
| assert.Fail(t, "metric %s found more than once", name) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| assert.True(t, found, "metric %s not found", name) | ||
| } | ||
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| func TestInternalTelemetryMetrics(t *testing.T) { | ||
| tests := []struct { | ||
| name string | ||
| otlpfile string | ||
| ddogfile string | ||
| expectedNumMissing int64 | ||
| }{ | ||
| { | ||
| name: "simple", | ||
| otlpfile: "testdata/otlpdata/source/simple.json", | ||
| ddogfile: "testdata/datadogdata/source/simple.json", | ||
| expectedNumMissing: 4, | ||
| }, | ||
| } | ||
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| for _, testinstance := range tests { | ||
| t.Run(testinstance.name, func(t *testing.T) { | ||
| set := componenttest.NewNopTelemetrySettings() | ||
| reader := sdkmetric.NewManualReader(sdkmetric.WithTemporalitySelector(deltaSelector)) | ||
| set.MeterProvider = sdkmetric.NewMeterProvider(sdkmetric.WithReader(reader)) | ||
| translator, err := NewTranslator(set) | ||
| require.NoError(t, err) | ||
| AssertTranslatorMap(t, translator, testinstance.otlpfile, testinstance.ddogfile) | ||
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| rm := &metricdata.ResourceMetrics{} | ||
| assert.NoError(t, reader.Collect(context.Background(), rm)) | ||
| AssertHasSumMetric[int64](t, rm, missingSourceMetricName, testinstance.expectedNumMissing) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| { | ||
| "Sketches": null, | ||
| "TimeSeries": [ | ||
| { | ||
| "Name": "with-source", | ||
| "Tags": [], | ||
| "Host": "res-hostname", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "with-source-2", | ||
| "Tags": [], | ||
| "Host": "res-hostname", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "missing-source-1", | ||
| "Tags": [], | ||
| "Host": "", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "missing-source-2", | ||
| "Tags": [], | ||
| "Host": "", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "missing-source-3", | ||
| "Tags": [], | ||
| "Host": "", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "missing-source-4", | ||
| "Tags": [], | ||
| "Host": "", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 1 | ||
| }, | ||
| { | ||
| "Name": "datadog.otlp_translator.metrics.missing_source", | ||
| "Tags": [], | ||
| "Host": "", | ||
| "OriginID": "", | ||
| "OriginProduct": 0, | ||
| "OriginCategory": 0, | ||
| "OriginService": 0, | ||
| "Type": "gauge", | ||
| "Timestamp": 1667560641226420924, | ||
| "Value": 37 | ||
| } | ||
| ] | ||
| } |
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