VictoriaMetrics/app/vminsert/influx/request_handler.go

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package influx
import (
"flag"
"io"
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"net/http"
"sync"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/common"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/relabel"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
parserCommon "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
parser "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/influx"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/writeconcurrencylimiter"
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"github.com/VictoriaMetrics/metrics"
)
var (
measurementFieldSeparator = flag.String("influxMeasurementFieldSeparator", "_", "Separator for '{measurement}{separator}{field_name}' metric name when inserted via Influx line protocol")
skipSingleField = flag.Bool("influxSkipSingleField", false, "Uses '{measurement}' instead of '{measurement}{separator}{field_name}' for metic name if Influx line contains only a single field")
skipMeasurement = flag.Bool("influxSkipMeasurement", false, "Uses '{field_name}' as a metric name while ignoring '{measurement}' and '-influxMeasurementFieldSeparator'")
)
var (
rowsInserted = metrics.NewCounter(`vm_rows_inserted_total{type="influx"}`)
rowsPerInsert = metrics.NewHistogram(`vm_rows_per_insert{type="influx"}`)
)
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// InsertHandlerForReader processes remote write for influx line protocol.
//
// See https://github.com/influxdata/telegraf/tree/master/plugins/inputs/socket_listener/
func InsertHandlerForReader(r io.Reader) error {
return writeconcurrencylimiter.Do(func() error {
return parser.ParseStream(r, false, "", "", func(db string, rows []parser.Row) error {
return insertRows(db, rows, nil)
})
})
}
// InsertHandlerForHTTP processes remote write for influx line protocol.
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//
// See https://github.com/influxdata/influxdb/blob/4cbdc197b8117fee648d62e2e5be75c6575352f0/tsdb/README.md
func InsertHandlerForHTTP(req *http.Request) error {
extraLabels, err := parserCommon.GetExtraLabels(req)
if err != nil {
return err
}
return writeconcurrencylimiter.Do(func() error {
isGzipped := req.Header.Get("Content-Encoding") == "gzip"
q := req.URL.Query()
precision := q.Get("precision")
// Read db tag from https://docs.influxdata.com/influxdb/v1.7/tools/api/#write-http-endpoint
db := q.Get("db")
return parser.ParseStream(req.Body, isGzipped, precision, db, func(db string, rows []parser.Row) error {
return insertRows(db, rows, extraLabels)
})
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})
}
func insertRows(db string, rows []parser.Row, extraLabels []prompbmarshal.Label) error {
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ctx := getPushCtx()
defer putPushCtx(ctx)
rowsLen := 0
for i := range rows {
rowsLen += len(rows[i].Fields)
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}
ic := &ctx.Common
ic.Reset(rowsLen)
rowsTotal := 0
hasRelabeling := relabel.HasRelabeling()
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for i := range rows {
r := &rows[i]
rowsTotal += len(r.Fields)
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ic.Labels = ic.Labels[:0]
hasDBKey := false
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for j := range r.Tags {
tag := &r.Tags[j]
if tag.Key == "db" {
hasDBKey = true
}
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ic.AddLabel(tag.Key, tag.Value)
}
if !hasDBKey {
ic.AddLabel("db", db)
}
for j := range extraLabels {
label := &extraLabels[j]
ic.AddLabel(label.Name, label.Value)
}
ctx.metricGroupBuf = ctx.metricGroupBuf[:0]
if !*skipMeasurement {
ctx.metricGroupBuf = append(ctx.metricGroupBuf, r.Measurement...)
}
skipFieldKey := len(r.Fields) == 1 && *skipSingleField
if len(ctx.metricGroupBuf) > 0 && !skipFieldKey {
ctx.metricGroupBuf = append(ctx.metricGroupBuf, *measurementFieldSeparator...)
}
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metricGroupPrefixLen := len(ctx.metricGroupBuf)
if hasRelabeling {
ctx.originLabels = append(ctx.originLabels[:0], ic.Labels...)
for j := range r.Fields {
f := &r.Fields[j]
if !skipFieldKey {
ctx.metricGroupBuf = append(ctx.metricGroupBuf[:metricGroupPrefixLen], f.Key...)
}
metricGroup := bytesutil.ToUnsafeString(ctx.metricGroupBuf)
ic.Labels = append(ic.Labels[:0], ctx.originLabels...)
ic.AddLabel("", metricGroup)
ic.ApplyRelabeling()
if len(ic.Labels) == 0 {
// Skip metric without labels.
continue
}
if err := ic.WriteDataPoint(nil, ic.Labels, r.Timestamp, f.Value); err != nil {
return err
}
}
} else {
ctx.metricNameBuf = storage.MarshalMetricNameRaw(ctx.metricNameBuf[:0], ic.Labels)
labelsLen := len(ic.Labels)
for j := range r.Fields {
f := &r.Fields[j]
if !skipFieldKey {
ctx.metricGroupBuf = append(ctx.metricGroupBuf[:metricGroupPrefixLen], f.Key...)
}
metricGroup := bytesutil.ToUnsafeString(ctx.metricGroupBuf)
ic.Labels = ic.Labels[:labelsLen]
ic.AddLabel("", metricGroup)
if len(ic.Labels) == 0 {
// Skip metric without labels.
continue
}
if err := ic.WriteDataPoint(ctx.metricNameBuf, ic.Labels[len(ic.Labels)-1:], r.Timestamp, f.Value); err != nil {
return err
}
}
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}
}
rowsInserted.Add(rowsTotal)
rowsPerInsert.Update(float64(rowsTotal))
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return ic.FlushBufs()
}
type pushCtx struct {
Common common.InsertCtx
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metricNameBuf []byte
metricGroupBuf []byte
originLabels []prompb.Label
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}
func (ctx *pushCtx) reset() {
ctx.Common.Reset(0)
ctx.metricNameBuf = ctx.metricNameBuf[:0]
ctx.metricGroupBuf = ctx.metricGroupBuf[:0]
originLabels := ctx.originLabels
for i := range originLabels {
label := &originLabels[i]
label.Name = nil
label.Value = nil
}
ctx.originLabels = ctx.originLabels[:0]
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}
func getPushCtx() *pushCtx {
select {
case ctx := <-pushCtxPoolCh:
return ctx
default:
if v := pushCtxPool.Get(); v != nil {
return v.(*pushCtx)
}
return &pushCtx{}
}
}
func putPushCtx(ctx *pushCtx) {
ctx.reset()
select {
case pushCtxPoolCh <- ctx:
default:
pushCtxPool.Put(ctx)
}
}
var pushCtxPool sync.Pool
var pushCtxPoolCh = make(chan *pushCtx, cgroup.AvailableCPUs())