mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2026-07-23 09:11:23 +03:00
5a587f2006
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
81 lines
2.5 KiB
Go
81 lines
2.5 KiB
Go
package prometheusimport
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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/httpserver"
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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/prometheus"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/prometheus/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="prometheus"}`)
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rowsPerInsert = metrics.NewHistogram(`vm_rows_per_insert{type="prometheus"}`)
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metadataInserted = metrics.NewCounter(`vm_metadata_rows_inserted_total{type="prometheus"}`)
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)
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// InsertHandler processes `/api/v1/import/prometheus` request.
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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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defaultTimestamp, err := protoparserutil.GetTimestamp(req)
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if err != nil {
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return err
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}
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encoding := req.Header.Get("Content-Encoding")
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return stream.Parse(req.Body, defaultTimestamp, encoding, true, prommetadata.IsEnabled(), func(rows []prometheus.Row, mms []prometheus.Metadata) error {
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return insertRows(rows, mms, extraLabels)
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}, func(s string) {
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httpserver.LogError(req, s)
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})
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}
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func insertRows(rows []prometheus.Row, mms []prometheus.Metadata, extraLabels []prompb.Label) error {
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ctx := common.GetInsertCtx()
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defer common.PutInsertCtx(ctx)
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ctx.Reset(len(rows))
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hasRelabeling := relabel.HasRelabeling()
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for i := range rows {
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r := &rows[i]
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ctx.Labels = ctx.Labels[:0]
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ctx.AddLabel("", r.Metric)
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for j := range r.Tags {
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tag := &r.Tags[j]
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ctx.AddLabel(tag.Key, tag.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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if err := ctx.WriteDataPoint(nil, ctx.Labels, r.Timestamp, r.Value); err != nil {
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return err
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}
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}
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rowsInserted.Add(len(rows))
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rowsPerInsert.Update(float64(len(rows)))
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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.WritePromMetadata(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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