Create new reason on the discarted sample metric - native histogram

Author: alanprot

pkg/cortexpb/compat.go

@@ -21,7 +21,7 @@ import (
 
 // ToWriteRequest converts matched slices of Labels, Samples and Metadata into a WriteRequest proto.
 // It gets timeseries from the pool, so ReuseSlice() should be called when done.
-func ToWriteRequest(lbls []labels.Labels, samples []Sample, metadata []*MetricMetadata, source WriteRequest_SourceEnum) *WriteRequest {
+func ToWriteRequest(lbls []labels.Labels, samples []Sample, metadata []*MetricMetadata, histograms []Histogram, source WriteRequest_SourceEnum) *WriteRequest {
 	req := &WriteRequest{
 		Timeseries: PreallocTimeseriesSliceFromPool(),
 		Metadata:   metadata,
@@ -32,6 +32,9 @@ func ToWriteRequest(lbls []labels.Labels, samples []Sample, metadata []*MetricMe
 		ts := TimeseriesFromPool()
 		ts.Labels = append(ts.Labels, FromLabelsToLabelAdapters(lbls[i])...)
 		ts.Samples = append(ts.Samples, s)
+		if i < len(histograms) {
+			ts.Histograms = append(ts.Histograms, histograms[i])
+		}
 		req.Timeseries = append(req.Timeseries, PreallocTimeseries{TimeSeries: ts})
 	}