diff --git a/README.md b/README.md index 73e1ce9c7..48553ef8a 100644 --- a/README.md +++ b/README.md @@ -1546,6 +1546,9 @@ VictoriaMetrics supports data ingestion via [OpenTelemetry protocol for metrics] VictoriaMetrics expects `protobuf`-encoded requests at `/opentelemetry/v1/metrics`. Set HTTP request header `Content-Encoding: gzip` when sending gzip-compressed data to `/opentelemetry/v1/metrics`. +VictoriaMetrics stores the ingested OpenTelemetry [raw samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) as is without any transformations. +Pass `-opentelemetry.usePrometheusNaming` command-line flag to VictoriaMetrics for automatic conversion of metric names and labels into Prometheus-compatible format. + See [How to use OpenTelemetry metrics with VictoriaMetrics](https://docs.victoriametrics.com/guides/getting-started-with-opentelemetry/). ## JSON line format diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md index 15da07791..525107c19 100644 --- a/docs/CHANGELOG.md +++ b/docs/CHANGELOG.md @@ -61,13 +61,13 @@ See also [LTS releases](https://docs.victoriametrics.com/lts-releases/). * FEATURE: [vmctl](https://docs.victoriametrics.com/vmctl.html): support client-side TLS configuration for VictoriaMetrics destination specified via `--vm-*` cmd-line flags used in [InfluxDB](https://docs.victoriametrics.com/vmctl/#migrating-data-from-influxdb-1x), [Remote Read protocol](https://docs.victoriametrics.com/vmctl/#migrating-data-by-remote-read-protocol), [OpenTSDB](https://docs.victoriametrics.com/vmctl/#migrating-data-from-opentsdb), [Prometheus](https://docs.victoriametrics.com/vmctl/#migrating-data-from-prometheus) and [Promscale](https://docs.victoriametrics.com/vmctl/#migrating-data-from-promscale) migration modes. * FEATURE: [vmctl](https://docs.victoriametrics.com/vmctl.html): split [explore phase](https://docs.victoriametrics.com/vmctl/#migrating-data-from-victoriametrics) in `vm-native` mode by time intervals when [--vm-native-step-interval](https://docs.victoriametrics.com/vmctl/#using-time-based-chunking-of-migration) is specified. This should reduce probability of exceeding complexity limits for number of selected series during explore phase. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5369). * FEATURE: [graphite](https://docs.victoriametrics.com/#graphite-render-api-usage): add support for [aggregateSeriesLists](https://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.aggregateSeriesLists), [diffSeriesLists](https://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.diffSeriesLists), [multiplySeriesLists](https://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.multiplySeriesLists) and [sumSeriesLists](https://graphite.readthedocs.io/en/latest/functions.html#graphite.render.functions.sumSeriesLists) functions. Thanks to @rbizos for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5809). -* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): added command line argument that enables OpenTelementry metric names and labels sanitization. +* FEATURE: [OpenTelemetry](https://docs.victoriametrics.com/#sending-data-via-opentelemetry): add `-opentelemetry.usePrometheusNaming` command-line flag, which can be used for enabling automatic conversion of the ingested metric names and labels into Prometheus-compatible format. See [these docs](https://docs.victoriametrics.com/#sending-data-via-opentelemetry) and [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6037). * BUGFIX: prevent from automatic deletion of newly registered time series when it is queried immediately after the addition. The probability of this bug has been increased significantly after [v1.99.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.99.0) because of optimizations related to registering new time series. See [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5948) and [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5959) issue. * BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly set `Host` header in requests to scrape targets if it is specified via [`headers` option](https://docs.victoriametrics.com/sd_configs/#http-api-client-options). Thanks to @fholzer for [the bugreport](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5969) and [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5970). * BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly set `Host` header in requests to scrape targets when [`server_name` option at `tls_config`](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#tls_config) is set. Previously the `Host` header was set incorrectly to the target hostname in this case. * BUGFIX: do not drop `match[]` filter at [`/api/v1/series`](https://docs.victoriametrics.com/url-examples/#apiv1series) if `-search.ignoreExtraFiltersAtLabelsAPI` command-line flag is set, since missing `match[]` filter breaks `/api/v1/series` requests. -* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): return proper resonses for [AWS Firehose](https://docs.aws.amazon.com/firehose/latest/dev/httpdeliveryrequestresponse.html#requestformat) requests according to [these docs](https://docs.aws.amazon.com/firehose/latest/dev/httpdeliveryrequestresponse.html#responseformat). See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6016). +* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): return proper resonses for [AWS Firehose](https://docs.aws.amazon.com/firehose/latest/dev/httpdeliveryrequestresponse.html#requestformat) requests according to [these docs](https://docs.aws.amazon.com/firehose/latest/dev/httpdeliveryrequestresponse.html#responseformat). See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6016) and [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6037). * BUGFIX: [vmctl](https://docs.victoriametrics.com/vmctl.html): properly parse TLS key and CA files for [InfluxDB](https://docs.victoriametrics.com/vmctl/#migrating-data-from-influxdb-1x) and [OpenTSDB](https://docs.victoriametrics.com/vmctl/#migrating-data-from-opentsdb) migration modes. * BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): fix VictoriaLogs UI query handling to correctly apply `_time` filter across all queries. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5920). * BUGFIX: [Single-node VictoriaMetrics](https://docs.victoriametrics.com/) and `vmselect` in [VictoriaMetrics cluster](https://docs.victoriametrics.com/cluster-victoriametrics/): limit duration of requests to /api/v1/labels, /api/v1/label/.../values or /api/v1/series with `-search.maxLabelsAPIDuration` duration. Before, `-search.maxExportDuration` value was used by mistake. The bug has been introduced in [v1.99.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.99.0). Thanks to @kbweave for the [pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5992). diff --git a/docs/README.md b/docs/README.md index 93e21b29f..bca4f660a 100644 --- a/docs/README.md +++ b/docs/README.md @@ -1549,6 +1549,9 @@ VictoriaMetrics supports data ingestion via [OpenTelemetry protocol for metrics] VictoriaMetrics expects `protobuf`-encoded requests at `/opentelemetry/v1/metrics`. Set HTTP request header `Content-Encoding: gzip` when sending gzip-compressed data to `/opentelemetry/v1/metrics`. +VictoriaMetrics stores the ingested OpenTelemetry [raw samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) as is without any transformations. +Pass `-opentelemetry.usePrometheusNaming` command-line flag to VictoriaMetrics for automatic conversion of metric names and labels into Prometheus-compatible format. + See [How to use OpenTelemetry metrics with VictoriaMetrics](https://docs.victoriametrics.com/guides/getting-started-with-opentelemetry/). ## JSON line format diff --git a/docs/Single-server-VictoriaMetrics.md b/docs/Single-server-VictoriaMetrics.md index 4f01dfd32..6745f427d 100644 --- a/docs/Single-server-VictoriaMetrics.md +++ b/docs/Single-server-VictoriaMetrics.md @@ -1557,6 +1557,9 @@ VictoriaMetrics supports data ingestion via [OpenTelemetry protocol for metrics] VictoriaMetrics expects `protobuf`-encoded requests at `/opentelemetry/v1/metrics`. Set HTTP request header `Content-Encoding: gzip` when sending gzip-compressed data to `/opentelemetry/v1/metrics`. +VictoriaMetrics stores the ingested OpenTelemetry [raw samples](https://docs.victoriametrics.com/keyconcepts/#raw-samples) as is without any transformations. +Pass `-opentelemetry.usePrometheusNaming` command-line flag to VictoriaMetrics for automatic conversion of metric names and labels into Prometheus-compatible format. + See [How to use OpenTelemetry metrics with VictoriaMetrics](https://docs.victoriametrics.com/guides/getting-started-with-opentelemetry/). ## JSON line format diff --git a/lib/promrelabel/relabel.go b/lib/promrelabel/relabel.go index 2e306fe70..38ab350c7 100644 --- a/lib/promrelabel/relabel.go +++ b/lib/promrelabel/relabel.go @@ -663,11 +663,15 @@ func SanitizeLabelName(name string) string { return labelNameSanitizer.Transform(name) } -// SanitizeLabelNameParts returns label name slice generated from metric name divided by unsupported characters -func SanitizeLabelNameParts(name string) []string { - return unsupportedLabelNameChars.Split(name, -1) +// SplitMetricNameToTokens returns tokens generated from metric name divided by unsupported Prometheus characters +// +// See https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels +func SplitMetricNameToTokens(name string) []string { + return nonAlphaNumChars.Split(name, -1) } +var nonAlphaNumChars = regexp.MustCompile(`[^a-zA-Z0-9]`) + var labelNameSanitizer = bytesutil.NewFastStringTransformer(func(s string) string { return unsupportedLabelNameChars.ReplaceAllString(s, "_") }) diff --git a/lib/protoparser/opentelemetry/stream/sanitize.go b/lib/protoparser/opentelemetry/stream/sanitize.go new file mode 100644 index 000000000..6b020344c --- /dev/null +++ b/lib/protoparser/opentelemetry/stream/sanitize.go @@ -0,0 +1,138 @@ +package stream + +import ( + "flag" + "slices" + "strings" + + "github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel" + "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry/pb" +) + +var ( + usePrometheusNaming = flag.Bool("opentelemetry.usePrometheusNaming", false, "Whether to convert metric names and labels into Prometheus-compatible format for the metrics ingested "+ + "via OpenTelemetry protocol; see https://docs.victoriametrics.com/#sending-data-via-opentelemetry") +) + +// unitMap is obtained from https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_name.go#L19 +var unitMap = map[string]string{ + // Time + "d": "days", + "h": "hours", + "min": "minutes", + "s": "seconds", + "ms": "milliseconds", + "us": "microseconds", + "ns": "nanoseconds", + + // Bytes + "By": "bytes", + "KiBy": "kibibytes", + "MiBy": "mebibytes", + "GiBy": "gibibytes", + "TiBy": "tibibytes", + "KBy": "kilobytes", + "MBy": "megabytes", + "GBy": "gigabytes", + "TBy": "terabytes", + + // SI + "m": "meters", + "V": "volts", + "A": "amperes", + "J": "joules", + "W": "watts", + "g": "grams", + + // Misc + "Cel": "celsius", + "Hz": "hertz", + "1": "", + "%": "percent", +} + +// perUnitMap is copied from https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_name.go#L58 +var perUnitMap = map[string]string{ + "s": "second", + "m": "minute", + "h": "hour", + "d": "day", + "w": "week", + "mo": "month", + "y": "year", +} + +// See https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_label.go#L26 +func sanitizeLabelName(labelName string) string { + if !*usePrometheusNaming { + return labelName + } + return sanitizePrometheusLabelName(labelName) +} + +func sanitizePrometheusLabelName(labelName string) string { + if len(labelName) == 0 { + return "" + } + labelName = promrelabel.SanitizeLabelName(labelName) + if labelName[0] >= '0' && labelName[0] <= '9' { + return "key_" + labelName + } else if strings.HasPrefix(labelName, "_") && !strings.HasPrefix(labelName, "__") { + return "key" + labelName + } + return labelName +} + +// See https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_name.go#L83 +func sanitizeMetricName(m *pb.Metric) string { + if !*usePrometheusNaming { + return m.Name + } + return sanitizePrometheusMetricName(m) +} + +func sanitizePrometheusMetricName(m *pb.Metric) string { + nameTokens := promrelabel.SplitMetricNameToTokens(m.Name) + + unitTokens := strings.SplitN(m.Unit, "/", 2) + if len(unitTokens) > 0 { + mainUnit := strings.TrimSpace(unitTokens[0]) + if mainUnit != "" && !strings.ContainsAny(mainUnit, "{}") { + if u, ok := unitMap[mainUnit]; ok { + mainUnit = u + } + if mainUnit != "" && !slices.Contains(nameTokens, mainUnit) { + nameTokens = append(nameTokens, mainUnit) + } + } + + if len(unitTokens) > 1 { + perUnit := strings.TrimSpace(unitTokens[1]) + if perUnit != "" && !strings.ContainsAny(perUnit, "{}") { + if u, ok := perUnitMap[perUnit]; ok { + perUnit = u + } + if perUnit != "" && !slices.Contains(nameTokens, perUnit) { + nameTokens = append(nameTokens, "per", perUnit) + } + } + } + } + + if m.Sum != nil && m.Sum.IsMonotonic { + nameTokens = moveOrAppend(nameTokens, "total") + } else if m.Unit == "1" && m.Gauge != nil { + nameTokens = moveOrAppend(nameTokens, "ratio") + } + return strings.Join(nameTokens, "_") +} + +func moveOrAppend(tokens []string, value string) []string { + for i := range tokens { + if tokens[i] == value { + tokens = append(tokens[:i], tokens[i+1:]...) + break + } + } + return append(tokens, value) +} diff --git a/lib/protoparser/opentelemetry/stream/sanitize_test.go b/lib/protoparser/opentelemetry/stream/sanitize_test.go new file mode 100644 index 000000000..fea2670fa --- /dev/null +++ b/lib/protoparser/opentelemetry/stream/sanitize_test.go @@ -0,0 +1,127 @@ +package stream + +import ( + "testing" + + "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry/pb" +) + +func TestSanitizePrometheusLabelName(t *testing.T) { + f := func(labelName, expectedResult string) { + t.Helper() + + result := sanitizePrometheusLabelName(labelName) + if result != expectedResult { + t.Fatalf("unexpected result; got %q; want %q", result, expectedResult) + } + } + + f("", "") + f("foo", "foo") + f("foo_bar/baz:abc", "foo_bar_baz_abc") + f("1foo", "key_1foo") + f("_foo", "key_foo") + f("__bar", "__bar") +} + +func TestSanitizePrometheusMetricName(t *testing.T) { + f := func(m *pb.Metric, expectedResult string) { + t.Helper() + + result := sanitizePrometheusMetricName(m) + if result != expectedResult { + t.Fatalf("unexpected result; got %q; want %q", result, expectedResult) + } + } + + f(&pb.Metric{}, "") + + f(&pb.Metric{ + Name: "foo", + }, "foo") + + f(&pb.Metric{ + Name: "foo", + Unit: "s", + }, "foo_seconds") + + f(&pb.Metric{ + Name: "foo_seconds", + Unit: "s", + }, "foo_seconds") + + f(&pb.Metric{ + Name: "foo", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + }, "foo_total") + + f(&pb.Metric{ + Name: "foo_total", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + }, "foo_total") + + f(&pb.Metric{ + Name: "foo", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + Unit: "s", + }, "foo_seconds_total") + + f(&pb.Metric{ + Name: "foo_seconds", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + Unit: "s", + }, "foo_seconds_total") + + f(&pb.Metric{ + Name: "foo_total", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + Unit: "s", + }, "foo_seconds_total") + + f(&pb.Metric{ + Name: "foo_seconds_total", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + Unit: "s", + }, "foo_seconds_total") + + f(&pb.Metric{ + Name: "foo_total_seconds", + Sum: &pb.Sum{ + IsMonotonic: true, + }, + Unit: "s", + }, "foo_seconds_total") + + f(&pb.Metric{ + Name: "foo", + Gauge: &pb.Gauge{}, + Unit: "1", + }, "foo_ratio") + + f(&pb.Metric{ + Name: "foo", + Unit: "m/s", + }, "foo_meters_per_second") + + f(&pb.Metric{ + Name: "foo_second", + Unit: "m/s", + }, "foo_second_meters") + + f(&pb.Metric{ + Name: "foo_meters", + Unit: "m/s", + }, "foo_meters_per_second") +} diff --git a/lib/protoparser/opentelemetry/stream/streamparser.go b/lib/protoparser/opentelemetry/stream/streamparser.go index 92aeab67a..bc5512b22 100644 --- a/lib/protoparser/opentelemetry/stream/streamparser.go +++ b/lib/protoparser/opentelemetry/stream/streamparser.go @@ -1,13 +1,10 @@ package stream import ( - "flag" "fmt" "io" "strconv" - "strings" "sync" - "unicode" "github.com/VictoriaMetrics/metrics" @@ -16,72 +13,11 @@ import ( "github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime" "github.com/VictoriaMetrics/VictoriaMetrics/lib/logger" "github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal" - "github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel" "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common" "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentelemetry/pb" "github.com/VictoriaMetrics/VictoriaMetrics/lib/writeconcurrencylimiter" ) -var ( - // sanitizeMetrics controls sanitizing metric and label names ingested via OpenTelemetry protocol. - sanitizeMetrics = flag.Bool("opentelemetry.sanitizeMetrics", false, "Sanitize metric and label names for the ingested OpenTelemetry data") -) - -// https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_name.go#L19 -var unitMap = []struct { - prefix string - units map[string]string -}{ - { - units: map[string]string{ - // Time - "d": "days", - "h": "hours", - "min": "minutes", - "s": "seconds", - "ms": "milliseconds", - "us": "microseconds", - "ns": "nanoseconds", - - // Bytes - "By": "bytes", - "KiBy": "kibibytes", - "MiBy": "mebibytes", - "GiBy": "gibibytes", - "TiBy": "tibibytes", - "KBy": "kilobytes", - "MBy": "megabytes", - "GBy": "gigabytes", - "TBy": "terabytes", - - // SI - "m": "meters", - "V": "volts", - "A": "amperes", - "J": "joules", - "W": "watts", - "g": "grams", - - // Misc - "Cel": "celsius", - "Hz": "hertz", - "1": "", - "%": "percent", - }, - }, { - prefix: "per", - units: map[string]string{ - "s": "second", - "m": "minute", - "h": "hour", - "d": "day", - "w": "week", - "mo": "month", - "y": "year", - }, - }, -} - // ParseStream parses OpenTelemetry protobuf or json data from r and calls callback for the parsed rows. // // callback shouldn't hold tss items after returning. @@ -355,74 +291,6 @@ func (wr *writeContext) parseRequestToTss(req *pb.ExportMetricsServiceRequest) { } } -// https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_label.go#L26 -func sanitizeLabelName(labelName string) string { - if !*sanitizeMetrics { - return labelName - } - if len(labelName) == 0 { - return labelName - } - labelName = promrelabel.SanitizeLabelName(labelName) - if unicode.IsDigit(rune(labelName[0])) { - return "key_" + labelName - } else if strings.HasPrefix(labelName, "_") && !strings.HasPrefix(labelName, "__") { - return "key" + labelName - } - return labelName -} - -// https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/b8655058501bed61a06bb660869051491f46840b/pkg/translator/prometheus/normalize_name.go#L83 -func sanitizeMetricName(metric *pb.Metric) string { - if !*sanitizeMetrics { - return metric.Name - } - nameTokens := promrelabel.SanitizeLabelNameParts(metric.Name) - unitTokens := strings.SplitN(metric.Unit, "/", len(unitMap)) - for i, u := range unitTokens { - unitToken := strings.TrimSpace(u) - if unitToken == "" || strings.ContainsAny(unitToken, "{}") { - continue - } - if unit, ok := unitMap[i].units[unitToken]; ok { - unitToken = unit - } - if unitToken != "" && !containsToken(nameTokens, unitToken) { - unitPrefix := unitMap[i].prefix - if unitPrefix != "" { - nameTokens = append(nameTokens, unitPrefix, unitToken) - } else { - nameTokens = append(nameTokens, unitToken) - } - } - } - if metric.Sum != nil && metric.Sum.IsMonotonic { - nameTokens = moveOrAppend(nameTokens, "total") - } else if metric.Unit == "1" && metric.Gauge != nil { - nameTokens = moveOrAppend(nameTokens, "ratio") - } - return strings.Join(nameTokens, "_") -} - -func containsToken(tokens []string, value string) bool { - for _, token := range tokens { - if token == value { - return true - } - } - return false -} - -func moveOrAppend(tokens []string, value string) []string { - for t := range tokens { - if tokens[t] == value { - tokens = append(tokens[:t], tokens[t+1:]...) - break - } - } - return append(tokens, value) -} - var wrPool sync.Pool func getWriteContext() *writeContext { diff --git a/lib/protoparser/opentelemetry/stream/streamparser_test.go b/lib/protoparser/opentelemetry/stream/streamparser_test.go index 242cb39f3..f363e5dfa 100644 --- a/lib/protoparser/opentelemetry/stream/streamparser_test.go +++ b/lib/protoparser/opentelemetry/stream/streamparser_test.go @@ -15,9 +15,14 @@ import ( ) func TestParseStream(t *testing.T) { - f := func(samples []*pb.Metric, tssExpected []prompbmarshal.TimeSeries, sanitize bool) { + f := func(samples []*pb.Metric, tssExpected []prompbmarshal.TimeSeries, usePromNaming bool) { t.Helper() - *sanitizeMetrics = sanitize + + prevPromNaming := *usePrometheusNaming + *usePrometheusNaming = usePromNaming + defer func() { + *usePrometheusNaming = prevPromNaming + }() checkSeries := func(tss []prompbmarshal.TimeSeries) error { if len(tss) != len(tssExpected) { @@ -122,7 +127,7 @@ func TestParseStream(t *testing.T) { false, ) - // Test gauge with unit and sanitization + // Test gauge with unit and prometheus naming f( []*pb.Metric{ generateGauge("my-gauge", "ms"),