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Signed-off-by: Arthur Silva Sens <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
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| package prometheus // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus" | ||
|
|
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| import ( | ||
| "github.com/prometheus/common/model" | ||
| "go.opentelemetry.io/collector/featuregate" | ||
| ) | ||
|
|
||
| var ( | ||
| dropSanitizationGate = featuregate.GlobalRegistry().MustRegister( | ||
| "pkg.translator.prometheus.PermissiveLabelSanitization", | ||
| featuregate.StageAlpha, | ||
| featuregate.WithRegisterDescription("Controls whether to change labels starting with '_' to 'key_'."), | ||
| featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/8950"), | ||
| ) | ||
|
|
||
| normalizeNameGate = featuregate.GlobalRegistry().MustRegister( | ||
| "pkg.translator.prometheus.NormalizeName", | ||
| featuregate.StageBeta, | ||
| featuregate.WithRegisterDescription("Controls whether metrics names are automatically normalized to follow Prometheus naming convention"), | ||
| featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/8950"), | ||
| ) | ||
|
|
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| allowUTF8FeatureGate = featuregate.GlobalRegistry().MustRegister( | ||
| "pkg.translator.prometheus.allowUTF8", | ||
| featuregate.StageAlpha, | ||
| featuregate.WithRegisterDescription("When enabled, metric names and labels will not be normalized to the traditional Prometheus naming rules, fundamentally allowing UTF-8 characters."), | ||
| featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/35459"), | ||
| featuregate.WithRegisterFromVersion("v0.110.0"), | ||
| ) | ||
| ) | ||
|
|
||
| func init() { | ||
| if allowUTF8FeatureGate.IsEnabled() { | ||
| model.NameValidationScheme = model.UTF8Validation | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package prometheus // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus" | ||
|
|
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| import ( | ||
| "strings" | ||
| "unicode" | ||
|
|
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| "go.opentelemetry.io/collector/pdata/pmetric" | ||
| ) | ||
|
|
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| type Translator interface { | ||
| TranslateAttribute(string) string | ||
| TranslateMetric(metric pmetric.Metric, namespace string, addMetricSuffixes bool) string | ||
| } | ||
|
|
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| type UTF8AllowedTranslator struct{} | ||
|
|
||
| func (UTF8AllowedTranslator) TranslateAttribute(attribute string) string { | ||
| return addKeyPrefixIfNeeded(attribute) | ||
| } | ||
|
|
||
| func (UTF8AllowedTranslator) TranslateMetric(metric pmetric.Metric, namespace string, addMetricSuffixes bool) string { | ||
| tokens := make([]string, 0) | ||
| if namespace != "" { | ||
| tokens = append(tokens, namespace) | ||
| } | ||
| tokens = append(tokens, metric.Name()) | ||
|
|
||
| if addMetricSuffixes && normalizeNameGate.IsEnabled() { | ||
| // Split unit at the '/' if any | ||
| unitTokens := strings.SplitN(metric.Unit(), "/", 2) | ||
|
|
||
| if len(unitTokens) > 0 { | ||
| mainUnitOtel := strings.TrimSpace(unitTokens[0]) | ||
| if mainUnitOtel != "" && !strings.ContainsAny(mainUnitOtel, "{}") { | ||
| tokens = append(tokens, unitMapGetOrDefault(mainUnitOtel)) | ||
| } | ||
|
|
||
| // Per unit | ||
| // Append if not blank and doesn't contain '{}' | ||
| if len(unitTokens) > 1 && unitTokens[1] != "" { | ||
| perUnitOtel := strings.TrimSpace(unitTokens[1]) | ||
| if perUnitOtel != "" && !strings.ContainsAny(perUnitOtel, "{}") { | ||
| tokens = append(tokens, perUnitMapGetOrDefault(perUnitOtel)) | ||
| } | ||
| } | ||
|
|
||
| } | ||
| } | ||
|
|
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| metricName := strings.Join(tokens, ".") | ||
|
|
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| // Append _total for Counters | ||
| if addMetricSuffixes && normalizeNameGate.IsEnabled() && metric.Type() == pmetric.MetricTypeSum && metric.Sum().IsMonotonic() { | ||
| metricName += "_total" | ||
| } | ||
| return metricName | ||
| } | ||
|
|
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| type ClassicTranslator struct{} | ||
|
|
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| func (ClassicTranslator) TranslateAttribute(attribute string) string { | ||
| // Trivial case | ||
| if len(attribute) == 0 { | ||
| return attribute | ||
| } | ||
|
|
||
| // Replace all non-alphanumeric runes with underscores | ||
| attribute = strings.Map(sanitizeRune, attribute) | ||
| attribute = addKeyPrefixIfNeeded(attribute) | ||
|
|
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| return attribute | ||
| } | ||
|
|
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| // Return '_' for anything non-alphanumeric | ||
| func sanitizeRune(r rune) rune { | ||
| if unicode.IsLetter(r) || unicode.IsDigit(r) { | ||
| return r | ||
| } | ||
| return '_' | ||
| } | ||
|
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| func addKeyPrefixIfNeeded(attribute string) string { | ||
| // If label starts with a number, prepend with "key_" | ||
| if unicode.IsDigit(rune(attribute[0])) { | ||
| attribute = "key_" + attribute | ||
| } else if strings.HasPrefix(attribute, "_") && !strings.HasPrefix(attribute, "__") && !dropSanitizationGate.IsEnabled() { | ||
| attribute = "key" + attribute | ||
| } | ||
| return attribute | ||
| } | ||
|
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| func (ClassicTranslator) TranslateMetric(metric pmetric.Metric, namespace string, addMetricSuffixes bool) string { | ||
| return BuildCompliantName(metric, namespace, addMetricSuffixes) | ||
| } | ||
|
|
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| func NewTranslator() Translator { | ||
| if allowUTF8FeatureGate.IsEnabled() { | ||
| return UTF8AllowedTranslator{} | ||
| } | ||
| return ClassicTranslator{} | ||
| } |
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