mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-20 23:46:23 +01:00
113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
package prometheus
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import (
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"fmt"
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"net/http"
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"runtime"
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"sync"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/common"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/concurrencylimiter"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
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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.NewSummary(`vm_rows_per_insert{type="prometheus"}`)
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)
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// InsertHandler processes remote write for prometheus.
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func InsertHandler(r *http.Request, maxSize int64) error {
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return concurrencylimiter.Do(func() error {
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return insertHandlerInternal(r, maxSize)
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})
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}
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func insertHandlerInternal(r *http.Request, maxSize int64) error {
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ctx := getPushCtx()
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defer putPushCtx(ctx)
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if err := ctx.Read(r, maxSize); err != nil {
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return err
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}
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timeseries := ctx.req.Timeseries
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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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ic := &ctx.Common
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ic.Reset(rowsLen)
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rowsTotal := 0
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for i := range timeseries {
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ts := ×eries[i]
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var metricNameRaw []byte
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for i := range ts.Samples {
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r := &ts.Samples[i]
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metricNameRaw = ic.WriteDataPointExt(metricNameRaw, ts.Labels, r.Timestamp, r.Value)
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}
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rowsTotal += len(ts.Samples)
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}
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rowsInserted.Add(rowsTotal)
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rowsPerInsert.Update(float64(rowsTotal))
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return ic.FlushBufs()
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}
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type pushCtx struct {
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Common common.InsertCtx
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req prompb.WriteRequest
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reqBuf []byte
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}
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func (ctx *pushCtx) reset() {
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ctx.Common.Reset(0)
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ctx.req.Reset()
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ctx.reqBuf = ctx.reqBuf[:0]
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}
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func (ctx *pushCtx) Read(r *http.Request, maxSize int64) error {
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prometheusReadCalls.Inc()
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var err error
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ctx.reqBuf, err = prompb.ReadSnappy(ctx.reqBuf[:0], r.Body, maxSize)
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if err != nil {
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prometheusReadErrors.Inc()
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return fmt.Errorf("cannot read prompb.WriteRequest: %s", err)
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}
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if err = ctx.req.Unmarshal(ctx.reqBuf); err != nil {
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prometheusUnmarshalErrors.Inc()
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return fmt.Errorf("cannot unmarshal prompb.WriteRequest with size %d bytes: %s", len(ctx.reqBuf), err)
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}
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return nil
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}
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var (
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prometheusReadCalls = metrics.NewCounter(`vm_read_calls_total{name="prometheus"}`)
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prometheusReadErrors = metrics.NewCounter(`vm_read_errors_total{name="prometheus"}`)
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prometheusUnmarshalErrors = metrics.NewCounter(`vm_unmarshal_errors_total{name="prometheus"}`)
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)
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func getPushCtx() *pushCtx {
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select {
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case ctx := <-pushCtxPoolCh:
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return ctx
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default:
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if v := pushCtxPool.Get(); v != nil {
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return v.(*pushCtx)
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}
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return &pushCtx{}
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}
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}
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func putPushCtx(ctx *pushCtx) {
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ctx.reset()
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select {
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case pushCtxPoolCh <- ctx:
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default:
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pushCtxPool.Put(ctx)
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}
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}
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var pushCtxPool sync.Pool
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var pushCtxPoolCh = make(chan *pushCtx, runtime.GOMAXPROCS(-1))
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