mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-20 15:36:31 +01:00
120 lines
3.6 KiB
Go
120 lines
3.6 KiB
Go
package common
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import (
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"flag"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/streamaggr"
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)
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var (
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streamAggrConfig = flag.String("streamAggr.config", "", "Optional path to file with stream aggregation config. "+
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"See https://docs.victoriametrics.com/stream-aggregation.html . "+
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"See also -remoteWrite.streamAggr.keepInput")
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streamAggrKeepInput = flag.Bool("streamAggr.keepInput", false, "Whether to keep input samples after the aggregation with -streamAggr.config. "+
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"By default the input is dropped after the aggregation, so only the aggregate data is stored. "+
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"See https://docs.victoriametrics.com/stream-aggregation.html")
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)
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// InitStreamAggr must be called after flag.Parse and before using the common package.
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//
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// MustStopStreamAggr must be called when stream aggr is no longer needed.
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func InitStreamAggr() {
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if *streamAggrConfig == "" {
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// Nothing to initialize
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return
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}
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a, err := streamaggr.LoadFromFile(*streamAggrConfig, pushAggregateSeries)
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if err != nil {
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logger.Fatalf("cannot load -streamAggr.config=%q: %s", *streamAggrConfig, err)
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}
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sa = a
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}
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// MustStopStreamAggr stops stream aggregators.
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func MustStopStreamAggr() {
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sa.MustStop()
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sa = nil
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}
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var sa *streamaggr.Aggregators
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type streamAggrCtx struct {
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mn storage.MetricName
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tss [1]prompbmarshal.TimeSeries
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}
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func (ctx *streamAggrCtx) Reset() {
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ctx.mn.Reset()
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ts := &ctx.tss[0]
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promrelabel.CleanLabels(ts.Labels)
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}
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func (ctx *streamAggrCtx) push(mrs []storage.MetricRow) {
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mn := &ctx.mn
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tss := ctx.tss[:]
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ts := &tss[0]
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labels := ts.Labels
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samples := ts.Samples
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for _, mr := range mrs {
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if err := mn.UnmarshalRaw(mr.MetricNameRaw); err != nil {
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logger.Panicf("BUG: cannot unmarshal recently marshaled MetricName: %s", err)
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}
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labels = append(labels[:0], prompbmarshal.Label{
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Name: "__name__",
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Value: bytesutil.ToUnsafeString(mn.MetricGroup),
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})
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for _, tag := range mn.Tags {
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labels = append(labels, prompbmarshal.Label{
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Name: bytesutil.ToUnsafeString(tag.Key),
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Value: bytesutil.ToUnsafeString(tag.Value),
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})
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}
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samples = append(samples[:0], prompbmarshal.Sample{
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Timestamp: mr.Timestamp,
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Value: mr.Value,
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})
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ts.Labels = labels
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ts.Samples = samples
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sa.Push(tss)
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}
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}
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func pushAggregateSeries(tss []prompbmarshal.TimeSeries) {
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currentTimestamp := int64(fasttime.UnixTimestamp()) * 1000
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var ctx InsertCtx
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ctx.Reset(len(tss))
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ctx.skipStreamAggr = true
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for _, ts := range tss {
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labels := ts.Labels
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for _, label := range labels {
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name := label.Name
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if name == "__name__" {
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name = ""
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}
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ctx.AddLabel(name, label.Value)
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}
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value := ts.Samples[0].Value
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if err := ctx.WriteDataPoint(nil, ctx.Labels, currentTimestamp, value); err != nil {
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logger.Errorf("cannot store aggregate series: %s", err)
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// Do not continue pushing the remaining samples, since it is likely they will return the same error.
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return
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}
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}
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// There is no need in limiting the number of concurrent calls to vmstorage.AddRows() here,
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// since the number of concurrent pushAggregateSeries() calls should be already limited by lib/streamaggr.
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if err := vmstorage.AddRows(ctx.mrs); err != nil {
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logger.Errorf("cannot flush aggregate series: %s", err)
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}
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}
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