mirror of
https://github.com/hanzoai/metrics.git
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f41gh7
6c58091b20
This commits adds storage part and cluster RPC methods for metrics metadata. Key concepts: * vmstorage persists metadata in-memory only. * vmstorage evicts metadata records older than 1 hour. * vmstorage stores only the last value of metadata for time series metric name. * vminsert opens an additional TCP connection to the vmstorage for metadata write requests. * vmselect doesn't support `limit_per_metric_name`. This feature is available optional and must be enabled via flag - `-enableMetadata` provided to vminsert/vmsingle. Fixes github.com/VictoriaMetrics/VictoriaMetrics/issues/2974
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
package promremotewrite
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import (
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"fmt"
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"net/http"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/common"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/relabel"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prommetadata"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/promremotewrite/stream"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/protoparserutil"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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rowsInserted = metrics.NewCounter(`vm_rows_inserted_total{type="promremotewrite"}`)
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rowsPerInsert = metrics.NewHistogram(`vm_rows_per_insert{type="promremotewrite"}`)
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metadataInserted = metrics.NewCounter(`vm_metadata_rows_inserted_total{type="promremotewrite"}`)
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)
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// InsertHandler processes remote write for prometheus.
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func InsertHandler(req *http.Request) error {
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extraLabels, err := protoparserutil.GetExtraLabels(req)
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if err != nil {
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return err
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}
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isVMRemoteWrite := req.Header.Get("Content-Encoding") == "zstd"
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return stream.Parse(req.Body, isVMRemoteWrite, func(tss []prompb.TimeSeries, mms []prompb.MetricMetadata) error {
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return insertRows(tss, mms, extraLabels)
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})
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}
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func insertRows(timeseries []prompb.TimeSeries, mms []prompb.MetricMetadata, extraLabels []prompb.Label) error {
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ctx := common.GetInsertCtx()
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defer common.PutInsertCtx(ctx)
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rowsLen := 0
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for i := range timeseries {
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rowsLen += len(timeseries[i].Samples)
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}
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ctx.Reset(rowsLen)
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rowsTotal := 0
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hasRelabeling := relabel.HasRelabeling()
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for i := range timeseries {
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ts := ×eries[i]
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rowsTotal += len(ts.Samples)
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ctx.Labels = ctx.Labels[:0]
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srcLabels := ts.Labels
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for _, srcLabel := range srcLabels {
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ctx.AddLabel(srcLabel.Name, srcLabel.Value)
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}
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for j := range extraLabels {
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label := &extraLabels[j]
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ctx.AddLabel(label.Name, label.Value)
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}
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if !ctx.TryPrepareLabels(hasRelabeling) {
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continue
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}
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var metricNameRaw []byte
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var err error
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samples := ts.Samples
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for i := range samples {
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r := &samples[i]
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metricNameRaw, err = ctx.WriteDataPointExt(metricNameRaw, ctx.Labels, r.Timestamp, r.Value)
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if err != nil {
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return err
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}
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}
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}
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rowsInserted.Add(rowsTotal)
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rowsPerInsert.Update(float64(rowsTotal))
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if err := ctx.FlushBufs(); err != nil {
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return fmt.Errorf("cannot flush metric bufs: %w", err)
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}
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if prommetadata.IsEnabled() {
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if err := ctx.WriteMetadata(mms); err != nil {
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return err
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}
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metadataInserted.Add(len(mms))
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}
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return nil
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}
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