92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package scraperhelper // import "go.opentelemetry.io/collector/scraper/scraperhelper"
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import (
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"context"
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"errors"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/codes"
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"go.opentelemetry.io/otel/metric"
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"go.uber.org/zap"
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"go.opentelemetry.io/collector/component"
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"go.opentelemetry.io/collector/pdata/pmetric"
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"go.opentelemetry.io/collector/pipeline"
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"go.opentelemetry.io/collector/scraper"
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"go.opentelemetry.io/collector/scraper/scrapererror"
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"go.opentelemetry.io/collector/scraper/scraperhelper/internal/metadata"
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)
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const (
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// scraperKey used to identify scrapers in metrics and traces.
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scraperKey = "scraper"
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// scrapedMetricPointsKey used to identify metric points scraped by the
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// Collector.
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scrapedMetricPointsKey = "scraped_metric_points"
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// erroredMetricPointsKey used to identify metric points errored (i.e.
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// unable to be scraped) by the Collector.
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erroredMetricPointsKey = "errored_metric_points"
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spanNameSep = "/"
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// receiverKey used to identify receivers in metrics and traces.
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receiverKey = "receiver"
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// FormatKey used to identify the format of the data received.
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formatKey = "format"
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)
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func wrapObsMetrics(sc scraper.Metrics, receiverID, scraperID component.ID, set component.TelemetrySettings) (scraper.Metrics, error) {
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telemetryBuilder, errBuilder := metadata.NewTelemetryBuilder(set)
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if errBuilder != nil {
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return nil, errBuilder
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}
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tracer := metadata.Tracer(set)
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spanName := scraperKey + spanNameSep + scraperID.String() + spanNameSep + "ScrapeMetrics"
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otelAttrs := metric.WithAttributeSet(attribute.NewSet(
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attribute.String(receiverKey, receiverID.String()),
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attribute.String(scraperKey, scraperID.String()),
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))
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scraperFuncs := func(ctx context.Context) (pmetric.Metrics, error) {
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ctx, span := tracer.Start(ctx, spanName)
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defer span.End()
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md, err := sc.ScrapeMetrics(ctx)
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numScrapedMetrics := 0
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numErroredMetrics := 0
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if err != nil {
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set.Logger.Error("Error scraping metrics", zap.Error(err))
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var partialErr scrapererror.PartialScrapeError
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if errors.As(err, &partialErr) {
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numErroredMetrics = partialErr.Failed
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numScrapedMetrics = md.MetricCount()
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}
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} else {
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numScrapedMetrics = md.MetricCount()
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}
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telemetryBuilder.ScraperScrapedMetricPoints.Add(ctx, int64(numScrapedMetrics), otelAttrs)
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telemetryBuilder.ScraperErroredMetricPoints.Add(ctx, int64(numErroredMetrics), otelAttrs)
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// end span according to errors
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if span.IsRecording() {
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span.SetAttributes(
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attribute.String(formatKey, pipeline.SignalMetrics.String()),
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attribute.Int64(scrapedMetricPointsKey, int64(numScrapedMetrics)),
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attribute.Int64(erroredMetricPointsKey, int64(numErroredMetrics)),
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)
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if err != nil {
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span.SetStatus(codes.Error, err.Error())
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}
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}
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return md, err
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}
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return scraper.NewMetrics(scraperFuncs, scraper.WithStart(sc.Start), scraper.WithShutdown(sc.Shutdown))
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}
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