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prometheusremotewrite: Introduce pluggable conversion architecture
Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package prometheusremotewrite // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheusremotewrite" | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| "go.opentelemetry.io/collector/pdata/pcommon" | ||
| "go.opentelemetry.io/collector/pdata/pmetric" | ||
| "go.uber.org/multierr" | ||
|
|
||
| prometheustranslator "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus" | ||
| ) | ||
|
|
||
| // ConvertMetrics converts pmetric.Metrics to another metrics format via the converter. | ||
| func ConvertMetrics(md pmetric.Metrics, settings Settings, converter MetricsConverter) (errs error) { | ||
| resourceMetricsSlice := md.ResourceMetrics() | ||
| for i := 0; i < resourceMetricsSlice.Len(); i++ { | ||
| resourceMetrics := resourceMetricsSlice.At(i) | ||
| resource := resourceMetrics.Resource() | ||
| scopeMetricsSlice := resourceMetrics.ScopeMetrics() | ||
| // keep track of the most recent timestamp in the ResourceMetrics for | ||
| // use with the "target" info metric | ||
| var mostRecentTimestamp pcommon.Timestamp | ||
| for j := 0; j < scopeMetricsSlice.Len(); j++ { | ||
| metricSlice := scopeMetricsSlice.At(j).Metrics() | ||
|
|
||
| // TODO: decide if instrumentation library information should be exported as labels | ||
| for k := 0; k < metricSlice.Len(); k++ { | ||
| metric := metricSlice.At(k) | ||
| mostRecentTimestamp = maxTimestamp(mostRecentTimestamp, mostRecentTimestampInMetric(metric)) | ||
|
|
||
| if !isValidAggregationTemporality(metric) { | ||
| errs = multierr.Append(errs, fmt.Errorf("invalid temporality and type combination for metric %q", metric.Name())) | ||
| continue | ||
| } | ||
|
|
||
| promName := prometheustranslator.BuildCompliantName(metric, settings.Namespace, settings.AddMetricSuffixes) | ||
|
|
||
| // handle individual metrics based on type | ||
| //exhaustive:enforce | ||
| switch metric.Type() { | ||
| case pmetric.MetricTypeGauge: | ||
| dataPoints := metric.Gauge().DataPoints() | ||
| if dataPoints.Len() == 0 { | ||
| errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name())) | ||
| break | ||
| } | ||
| errs = multierr.Append(errs, converter.AddGaugeNumberDataPoints(dataPoints, resource, settings, promName)) | ||
| case pmetric.MetricTypeSum: | ||
| dataPoints := metric.Sum().DataPoints() | ||
| if dataPoints.Len() == 0 { | ||
| errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name())) | ||
| break | ||
| } | ||
| errs = multierr.Append(errs, converter.AddSumNumberDataPoints(dataPoints, resource, metric, settings, promName)) | ||
| case pmetric.MetricTypeHistogram: | ||
| dataPoints := metric.Histogram().DataPoints() | ||
| if dataPoints.Len() == 0 { | ||
| errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name())) | ||
| break | ||
| } | ||
| errs = multierr.Append(errs, converter.AddHistogramDataPoints(dataPoints, resource, settings, promName)) | ||
| case pmetric.MetricTypeExponentialHistogram: | ||
| dataPoints := metric.ExponentialHistogram().DataPoints() | ||
| if dataPoints.Len() == 0 { | ||
| errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name())) | ||
| break | ||
| } | ||
| errs = multierr.Append(errs, converter.AddExponentialHistogramDataPoints( | ||
| dataPoints, | ||
| resource, | ||
| settings, | ||
| promName, | ||
| )) | ||
| case pmetric.MetricTypeSummary: | ||
| dataPoints := metric.Summary().DataPoints() | ||
| if dataPoints.Len() == 0 { | ||
| errs = multierr.Append(errs, fmt.Errorf("empty data points. %s is dropped", metric.Name())) | ||
| break | ||
| } | ||
| errs = multierr.Append(errs, converter.AddSummaryDataPoints(dataPoints, resource, settings, promName)) | ||
| default: | ||
| errs = multierr.Append(errs, errors.New("unsupported metric type")) | ||
| } | ||
| } | ||
| } | ||
| addResourceTargetInfo(resource, settings, mostRecentTimestamp, converter) | ||
| } | ||
|
|
||
| return | ||
| } |
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