mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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app/vmagent: follow-up for 090cb2c9de
- Add Try* prefix to functions, which return bool result in order to improve readability and reduce the probability of missing check for the result returned from these functions. - Call the adjustSampleValues() only once on input samples. Previously it was called on every attempt to flush data to peristent queue. - Properly restore the initial state of WriteRequest passed to tryPushWriteRequest() before returning from this function after unsuccessful push to persistent queue. Previously a part of WriteRequest samples may be lost in such case. - Add -remoteWrite.dropSamplesOnOverload command-line flag, which can be used for dropping incoming samples instead of returning 429 Too Many Requests error to the client when -remoteWrite.disableOnDiskQueue is set and the remote storage cannot keep up with the data ingestion rate. - Add vmagent_remotewrite_samples_dropped_total metric, which counts the number of dropped samples. - Add vmagent_remotewrite_push_failures_total metric, which counts the number of unsuccessful attempts to push data to persistent queue when -remoteWrite.disableOnDiskQueue is set. - Remove vmagent_remotewrite_aggregation_metrics_dropped_total and vm_promscrape_push_samples_dropped_total metrics, because they are replaced with vmagent_remotewrite_samples_dropped_total metric. - Update 'Disabling on-disk persistence' docs at docs/vmagent.md - Update stale comments in the code Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5088 Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2110
This commit is contained in:
Aliaksandr Valialkin
parent
090cb2c9de
commit
5034aa0773
23 changed files with 267 additions and 230 deletions
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@ -65,7 +65,7 @@ func insertRows(at *auth.Token, rows []parser.Row, extraLabels []prompbmarshal.L
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -88,7 +88,7 @@ func insertRows(at *auth.Token, series []datadog.Series, extraLabels []prompbmar
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(rowsTotal)
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@ -56,7 +56,7 @@ func insertRows(rows []parser.Row) error {
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(nil, &ctx.WriteRequest) {
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if !remotewrite.TryPush(nil, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -130,7 +130,7 @@ func insertRows(at *auth.Token, db string, rows []parser.Row, extraLabels []prom
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ctx.ctx.Labels = labels
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ctx.ctx.Samples = samples
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ctx.commonLabels = commonLabels
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if !remotewrite.Push(at, &ctx.ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(rowsTotal)
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@ -37,6 +37,7 @@ import (
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opentsdbhttpserver "github.com/VictoriaMetrics/VictoriaMetrics/lib/ingestserver/opentsdbhttp"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/pushmetrics"
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@ -139,7 +140,9 @@ func main() {
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opentsdbhttpServer = opentsdbhttpserver.MustStart(*opentsdbHTTPListenAddr, *opentsdbHTTPUseProxyProtocol, httpInsertHandler)
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}
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promscrape.Init(remotewrite.Push)
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promscrape.Init(func(at *auth.Token, wr *prompbmarshal.WriteRequest) {
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_ = remotewrite.TryPush(at, wr)
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})
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if len(*httpListenAddr) > 0 {
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go httpserver.Serve(*httpListenAddr, *useProxyProtocol, requestHandler)
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@ -84,7 +84,7 @@ func insertRows(at *auth.Token, block *stream.Block, extraLabels []prompbmarshal
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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return nil
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@ -76,7 +76,7 @@ func insertRows(at *auth.Token, rows []newrelic.Row, extraLabels []prompbmarshal
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -59,7 +59,7 @@ func insertRows(at *auth.Token, tss []prompbmarshal.TimeSeries, extraLabels []pr
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(rowsTotal)
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@ -56,7 +56,7 @@ func insertRows(rows []parser.Row) error {
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(nil, &ctx.WriteRequest) {
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if !remotewrite.TryPush(nil, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -64,7 +64,7 @@ func insertRows(at *auth.Token, rows []parser.Row, extraLabels []prompbmarshal.L
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -73,7 +73,7 @@ func insertRows(at *auth.Token, rows []parser.Row, extraLabels []prompbmarshal.L
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(len(rows))
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@ -69,7 +69,7 @@ func insertRows(at *auth.Token, timeseries []prompb.TimeSeries, extraLabels []pr
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ctx.WriteRequest.Timeseries = tssDst
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ctx.Labels = labels
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ctx.Samples = samples
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if !remotewrite.Push(at, &ctx.WriteRequest) {
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if !remotewrite.TryPush(at, &ctx.WriteRequest) {
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return remotewrite.ErrQueueFullHTTPRetry
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}
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rowsInserted.Add(rowsTotal)
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@ -57,11 +57,11 @@ func (ps *pendingSeries) MustStop() {
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ps.periodicFlusherWG.Wait()
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}
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func (ps *pendingSeries) Push(tss []prompbmarshal.TimeSeries) bool {
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func (ps *pendingSeries) TryPush(tss []prompbmarshal.TimeSeries) bool {
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ps.mu.Lock()
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wasPushed := ps.wr.push(tss)
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ok := ps.wr.tryPush(tss)
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ps.mu.Unlock()
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return wasPushed
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return ok
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}
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func (ps *pendingSeries) periodicFlusher() {
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@ -84,8 +84,7 @@ func (ps *pendingSeries) periodicFlusher() {
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}
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}
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ps.mu.Lock()
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// no-op
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_ = ps.wr.flush()
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_ = ps.wr.tryFlush()
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ps.mu.Unlock()
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}
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}
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@ -94,15 +93,16 @@ type writeRequest struct {
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// Move lastFlushTime to the top of the struct in order to guarantee atomic access on 32-bit architectures.
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lastFlushTime uint64
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// The queue to send blocks to.
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fq *persistentqueue.FastQueue
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// Whether to encode the write request with VictoriaMetrics remote write protocol.
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isVMRemoteWrite bool
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// How many significant figures must be left before sending the writeRequest to pushBlock.
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// How many significant figures must be left before sending the writeRequest to fq.
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significantFigures int
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// How many decimal digits after point must be left before sending the writeRequest to pushBlock.
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// How many decimal digits after point must be left before sending the writeRequest to fq.
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roundDigits int
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wr prompbmarshal.WriteRequest
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@ -115,7 +115,7 @@ type writeRequest struct {
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}
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func (wr *writeRequest) reset() {
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// Do not reset lastFlushTime, pushBlock, isVMRemoteWrite, significantFigures and roundDigits, since they are re-used.
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// Do not reset lastFlushTime, fq, isVMRemoteWrite, significantFigures and roundDigits, since they are re-used.
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wr.wr.Timeseries = nil
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@ -133,41 +133,40 @@ func (wr *writeRequest) reset() {
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wr.buf = wr.buf[:0]
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}
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// mustFlushOnStop makes force push into the queue
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// needed to properly save in-memory buffer with disabled disk storage
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// mustFlushOnStop force pushes wr data into wr.fq
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//
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// This is needed in order to properly save in-memory data to persistent queue on graceful shutdown.
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func (wr *writeRequest) mustFlushOnStop() {
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wr.wr.Timeseries = wr.tss
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wr.adjustSampleValues()
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atomic.StoreUint64(&wr.lastFlushTime, fasttime.UnixTimestamp())
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if !pushWriteRequest(&wr.wr, func(block []byte) bool {
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wr.fq.MustWriteBlockIgnoreDisabledPQ(block)
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return true
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}, wr.isVMRemoteWrite) {
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return
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if !tryPushWriteRequest(&wr.wr, wr.mustWriteBlock, wr.isVMRemoteWrite) {
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logger.Panicf("BUG: final flush must always return true")
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}
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wr.reset()
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}
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func (wr *writeRequest) flush() bool {
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func (wr *writeRequest) mustWriteBlock(block []byte) bool {
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wr.fq.MustWriteBlockIgnoreDisabledPQ(block)
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return true
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}
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func (wr *writeRequest) tryFlush() bool {
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wr.wr.Timeseries = wr.tss
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wr.adjustSampleValues()
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atomic.StoreUint64(&wr.lastFlushTime, fasttime.UnixTimestamp())
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if !pushWriteRequest(&wr.wr, wr.fq.WriteBlock, wr.isVMRemoteWrite) {
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if !tryPushWriteRequest(&wr.wr, wr.fq.TryWriteBlock, wr.isVMRemoteWrite) {
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return false
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}
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wr.reset()
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return true
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}
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func (wr *writeRequest) adjustSampleValues() {
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samples := wr.samples
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if n := wr.significantFigures; n > 0 {
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func adjustSampleValues(samples []prompbmarshal.Sample, significantFigures, roundDigits int) {
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if n := significantFigures; n > 0 {
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for i := range samples {
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s := &samples[i]
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s.Value = decimal.RoundToSignificantFigures(s.Value, n)
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}
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}
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if n := wr.roundDigits; n < 100 {
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if n := roundDigits; n < 100 {
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for i := range samples {
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s := &samples[i]
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s.Value = decimal.RoundToDecimalDigits(s.Value, n)
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@ -175,7 +174,7 @@ func (wr *writeRequest) adjustSampleValues() {
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}
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}
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func (wr *writeRequest) push(src []prompbmarshal.TimeSeries) bool {
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func (wr *writeRequest) tryPush(src []prompbmarshal.TimeSeries) bool {
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tssDst := wr.tss
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maxSamplesPerBlock := *maxRowsPerBlock
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// Allow up to 10x of labels per each block on average.
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@ -183,13 +182,15 @@ func (wr *writeRequest) push(src []prompbmarshal.TimeSeries) bool {
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for i := range src {
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if len(wr.samples) >= maxSamplesPerBlock || len(wr.labels) >= maxLabelsPerBlock {
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wr.tss = tssDst
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if !wr.flush() {
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if !wr.tryFlush() {
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return false
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}
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tssDst = wr.tss
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}
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tsSrc := &src[i]
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adjustSampleValues(tsSrc.Samples, wr.significantFigures, wr.roundDigits)
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tssDst = append(tssDst, prompbmarshal.TimeSeries{})
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wr.copyTimeSeries(&tssDst[len(tssDst)-1], &src[i])
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wr.copyTimeSeries(&tssDst[len(tssDst)-1], tsSrc)
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}
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wr.tss = tssDst
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@ -221,7 +222,7 @@ func (wr *writeRequest) copyTimeSeries(dst, src *prompbmarshal.TimeSeries) {
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wr.buf = buf
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}
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func pushWriteRequest(wr *prompbmarshal.WriteRequest, pushBlock func(block []byte) bool, isVMRemoteWrite bool) bool {
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func tryPushWriteRequest(wr *prompbmarshal.WriteRequest, tryPushBlock func(block []byte) bool, isVMRemoteWrite bool) bool {
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if len(wr.Timeseries) == 0 {
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// Nothing to push
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return true
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@ -237,7 +238,7 @@ func pushWriteRequest(wr *prompbmarshal.WriteRequest, pushBlock func(block []byt
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}
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writeRequestBufPool.Put(bb)
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if len(zb.B) <= persistentqueue.MaxBlockSize {
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if !pushBlock(zb.B) {
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if !tryPushBlock(zb.B) {
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return false
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}
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blockSizeRows.Update(float64(len(wr.Timeseries)))
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@ -260,11 +261,13 @@ func pushWriteRequest(wr *prompbmarshal.WriteRequest, pushBlock func(block []byt
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}
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n := len(samples) / 2
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wr.Timeseries[0].Samples = samples[:n]
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if !pushWriteRequest(wr, pushBlock, isVMRemoteWrite) {
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if !tryPushWriteRequest(wr, tryPushBlock, isVMRemoteWrite) {
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wr.Timeseries[0].Samples = samples
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return false
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}
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wr.Timeseries[0].Samples = samples[n:]
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if !pushWriteRequest(wr, pushBlock, isVMRemoteWrite) {
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if !tryPushWriteRequest(wr, tryPushBlock, isVMRemoteWrite) {
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wr.Timeseries[0].Samples = samples
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return false
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}
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wr.Timeseries[0].Samples = samples
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@ -273,11 +276,13 @@ func pushWriteRequest(wr *prompbmarshal.WriteRequest, pushBlock func(block []byt
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timeseries := wr.Timeseries
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n := len(timeseries) / 2
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wr.Timeseries = timeseries[:n]
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if !pushWriteRequest(wr, pushBlock, isVMRemoteWrite) {
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if !tryPushWriteRequest(wr, tryPushBlock, isVMRemoteWrite) {
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wr.Timeseries = timeseries
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return false
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}
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wr.Timeseries = timeseries[n:]
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if !pushWriteRequest(wr, pushBlock, isVMRemoteWrite) {
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if !tryPushWriteRequest(wr, tryPushBlock, isVMRemoteWrite) {
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wr.Timeseries = timeseries
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return false
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}
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wr.Timeseries = timeseries
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@ -33,7 +33,9 @@ func testPushWriteRequest(t *testing.T, rowsCount, expectedBlockLenProm, expecte
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pushBlockLen = len(block)
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return true
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}
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_ = pushWriteRequest(wr, pushBlock, isVMRemoteWrite)
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if !tryPushWriteRequest(wr, pushBlock, isVMRemoteWrite) {
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t.Fatalf("cannot push data to to remote storage")
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}
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if math.Abs(float64(pushBlockLen-expectedBlockLen)/float64(expectedBlockLen)*100) > tolerancePrc {
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t.Fatalf("unexpected block len for rowsCount=%d, isVMRemoteWrite=%v; got %d bytes; expecting %d bytes +- %.0f%%",
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rowsCount, isVMRemoteWrite, pushBlockLen, expectedBlockLen, tolerancePrc)
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@ -47,8 +47,8 @@ var (
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shardByURLLabels = flagutil.NewArrayString("remoteWrite.shardByURL.labels", "Optional list of labels, which must be used for sharding outgoing samples "+
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"among remote storage systems if -remoteWrite.shardByURL command-line flag is set. By default all the labels are used for sharding in order to gain "+
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"even distribution of series over the specified -remoteWrite.url systems")
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tmpDataPath = flag.String("remoteWrite.tmpDataPath", "vmagent-remotewrite-data", "Path to directory where temporary data for remote write component is stored. "+
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"See also -remoteWrite.maxDiskUsagePerURL")
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tmpDataPath = flag.String("remoteWrite.tmpDataPath", "vmagent-remotewrite-data", "Path to directory for storing pending data, which isn't sent to the configured -remoteWrite.url . "+
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"See also -remoteWrite.maxDiskUsagePerURL and -remoteWrite.disableOnDiskQueue")
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keepDanglingQueues = flag.Bool("remoteWrite.keepDanglingQueues", false, "Keep persistent queues contents at -remoteWrite.tmpDataPath in case there are no matching -remoteWrite.url. "+
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"Useful when -remoteWrite.url is changed temporarily and persistent queue files will be needed later on.")
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queues = flag.Int("remoteWrite.queues", cgroup.AvailableCPUs()*2, "The number of concurrent queues to each -remoteWrite.url. Set more queues if default number of queues "+
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@ -87,9 +87,11 @@ var (
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"are written to the corresponding -remoteWrite.url . See also -remoteWrite.streamAggr.keepInput and https://docs.victoriametrics.com/stream-aggregation.html")
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streamAggrDedupInterval = flagutil.NewArrayDuration("remoteWrite.streamAggr.dedupInterval", 0, "Input samples are de-duplicated with this interval before being aggregated. "+
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"Only the last sample per each time series per each interval is aggregated if the interval is greater than zero")
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disableOnDiskQueue = flag.Bool("remoteWrite.disableOnDiskQueue", false, "Whether to disable on-disk queue for metrics ingestion processing. "+
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"If in-memory queue is full for at least 1 remoteWrite target, all data ingestion is blocked and returns an error. "+
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"It allows to build a chain of vmagents and build complicated data pipelines without data-loss. On-disk writes is still possible during graceful shutdown for storing in-memory part of the queue.")
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disableOnDiskQueue = flag.Bool("remoteWrite.disableOnDiskQueue", false, "Whether to disable storing pending data to -remoteWrite.tmpDataPath "+
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"when the configured remote storage systems cannot keep up with the data ingestion rate. See https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence ."+
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"See also -remoteWrite.dropSamplesOnOverload")
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dropSamplesOnOverload = flag.Bool("remoteWrite.dropSamplesOnOverload", false, "Whether to drop samples when -remoteWrite.disableOnDiskQueue is set and if the samples "+
|
||||
"cannot be pushed into the configured remote storage systems in a timely manner. See https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence")
|
||||
)
|
||||
|
||||
var (
|
||||
|
|
@ -103,10 +105,11 @@ var (
|
|||
// Data without tenant id is written to defaultAuthToken if -remoteWrite.multitenantURL is specified.
|
||||
defaultAuthToken = &auth.Token{}
|
||||
|
||||
// ErrQueueFullHTTPRetry returned when -remoteWrite.disableOnDiskQueue enabled
|
||||
// and one of remote storage cannot handle a load
|
||||
// ErrQueueFullHTTPRetry must be returned when TryPush() returns false.
|
||||
ErrQueueFullHTTPRetry = &httpserver.ErrorWithStatusCode{
|
||||
Err: fmt.Errorf("in-memory queue is full, write requests blocked due to enabled flag -remoteWrite.disableOnDiskQueue=true. Retry request later"),
|
||||
Err: fmt.Errorf("remote storage systems cannot keep up with the data ingestion rate; retry the request later " +
|
||||
"or remove -remoteWrite.disableOnDiskQueue from vmagent command-line flags, so it could save pending data to -remoteWrite.tmpDataPath; " +
|
||||
"see https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence"),
|
||||
StatusCode: http.StatusTooManyRequests,
|
||||
}
|
||||
)
|
||||
|
|
@ -331,7 +334,7 @@ var configReloaderWG sync.WaitGroup
|
|||
|
||||
// Stop stops remotewrite.
|
||||
//
|
||||
// It is expected that nobody calls Push during and after the call to this func.
|
||||
// It is expected that nobody calls TryPush during and after the call to this func.
|
||||
func Stop() {
|
||||
close(configReloaderStopCh)
|
||||
configReloaderWG.Wait()
|
||||
|
|
@ -341,7 +344,7 @@ func Stop() {
|
|||
}
|
||||
rwctxsDefault = nil
|
||||
|
||||
// There is no need in locking rwctxsMapLock here, since nobody should call Push during the Stop call.
|
||||
// There is no need in locking rwctxsMapLock here, since nobody should call TryPush during the Stop call.
|
||||
for _, rwctxs := range rwctxsMap {
|
||||
for _, rwctx := range rwctxs {
|
||||
rwctx.MustStop()
|
||||
|
|
@ -357,13 +360,16 @@ func Stop() {
|
|||
}
|
||||
}
|
||||
|
||||
// Push sends wr to remote storage systems set via `-remoteWrite.url`.
|
||||
// TryPush tries sending wr to the configured remote storage systems set via -remoteWrite.url and -remoteWrite.multitenantURL
|
||||
//
|
||||
// If at is nil, then the data is pushed to the configured `-remoteWrite.url`.
|
||||
// If at isn't nil, the data is pushed to the configured `-remoteWrite.multitenantURL`.
|
||||
// If at is nil, then the data is pushed to the configured -remoteWrite.url.
|
||||
// If at isn't nil, the data is pushed to the configured -remoteWrite.multitenantURL.
|
||||
//
|
||||
// Note that wr may be modified by Push because of relabeling and rounding.
|
||||
func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
||||
// TryPush can modify wr contents, so the caller must re-initialize wr before calling TryPush() after unsuccessful attempt.
|
||||
// TryPush may send partial data from wr on unsuccessful attempt, so repeated call for the same wr may send the data multiple times.
|
||||
//
|
||||
// The caller must return ErrQueueFullHTTPRetry to the client, which sends wr, if TryPush returns false.
|
||||
func TryPush(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
||||
if at == nil && len(*remoteWriteMultitenantURLs) > 0 {
|
||||
// Write data to default tenant if at isn't set while -remoteWrite.multitenantURL is set.
|
||||
at = defaultAuthToken
|
||||
|
|
@ -387,30 +393,42 @@ func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
|||
}
|
||||
rwctxsMapLock.Unlock()
|
||||
}
|
||||
var isWritesLocked bool
|
||||
for _, rwctx := range rwctxs {
|
||||
if rwctx.fq.IsWritesBlocked() {
|
||||
isWritesLocked = true
|
||||
break
|
||||
|
||||
tss := wr.Timeseries
|
||||
rowsCount := getRowsCount(tss)
|
||||
|
||||
if *disableOnDiskQueue {
|
||||
// Quick check whether writes to configured remote storage systems are blocked.
|
||||
// This allows saving CPU time spent on relabeling and block compression
|
||||
// if some of remote storage systems cannot keep up with the data ingestion rate.
|
||||
for _, rwctx := range rwctxs {
|
||||
if rwctx.fq.IsWriteBlocked() {
|
||||
pushFailures.Inc()
|
||||
if *dropSamplesOnOverload {
|
||||
// Just drop samples
|
||||
samplesDropped.Add(rowsCount)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
}
|
||||
}
|
||||
// fast path, write path is blocked
|
||||
if isWritesLocked {
|
||||
return false
|
||||
}
|
||||
|
||||
var rctx *relabelCtx
|
||||
rcs := allRelabelConfigs.Load()
|
||||
pcsGlobal := rcs.global
|
||||
if pcsGlobal.Len() > 0 {
|
||||
rctx = getRelabelCtx()
|
||||
defer func() {
|
||||
rctx.reset()
|
||||
putRelabelCtx(rctx)
|
||||
}()
|
||||
}
|
||||
tss := wr.Timeseries
|
||||
rowsCount := getRowsCount(tss)
|
||||
globalRowsPushedBeforeRelabel.Add(rowsCount)
|
||||
maxSamplesPerBlock := *maxRowsPerBlock
|
||||
// Allow up to 10x of labels per each block on average.
|
||||
maxLabelsPerBlock := 10 * maxSamplesPerBlock
|
||||
|
||||
for len(tss) > 0 {
|
||||
// Process big tss in smaller blocks in order to reduce the maximum memory usage
|
||||
samplesCount := 0
|
||||
|
|
@ -418,7 +436,7 @@ func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
|||
i := 0
|
||||
for i < len(tss) {
|
||||
samplesCount += len(tss[i].Samples)
|
||||
labelsCount += len(tss[i].Labels)
|
||||
labelsCount += len(tss[i].Samples) * len(tss[i].Labels)
|
||||
i++
|
||||
if samplesCount >= maxSamplesPerBlock || labelsCount >= maxLabelsPerBlock {
|
||||
break
|
||||
|
|
@ -439,10 +457,14 @@ func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
|||
}
|
||||
sortLabelsIfNeeded(tssBlock)
|
||||
tssBlock = limitSeriesCardinality(tssBlock)
|
||||
if !pushBlockToRemoteStorages(rwctxs, tssBlock) {
|
||||
if rctx != nil {
|
||||
rctx.reset()
|
||||
putRelabelCtx(rctx)
|
||||
if !tryPushBlockToRemoteStorages(rwctxs, tssBlock) {
|
||||
if !*disableOnDiskQueue {
|
||||
logger.Panicf("BUG: tryPushBlockToRemoteStorages must return true if -remoteWrite.disableOnDiskQueue isn't set")
|
||||
}
|
||||
pushFailures.Inc()
|
||||
if *dropSamplesOnOverload {
|
||||
samplesDropped.Add(rowsCount)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
|
@ -450,13 +472,15 @@ func Push(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
|||
rctx.reset()
|
||||
}
|
||||
}
|
||||
if rctx != nil {
|
||||
putRelabelCtx(rctx)
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func pushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarshal.TimeSeries) bool {
|
||||
var (
|
||||
samplesDropped = metrics.NewCounter(`vmagent_remotewrite_samples_dropped_total`)
|
||||
pushFailures = metrics.NewCounter(`vmagent_remotewrite_push_failures_total`)
|
||||
)
|
||||
|
||||
func tryPushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarshal.TimeSeries) bool {
|
||||
if len(tssBlock) == 0 {
|
||||
// Nothing to push
|
||||
return true
|
||||
|
|
@ -464,8 +488,7 @@ func pushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarsha
|
|||
|
||||
if len(rwctxs) == 1 {
|
||||
// Fast path - just push data to the configured single remote storage
|
||||
err := rwctxs[0].Push(tssBlock)
|
||||
return err
|
||||
return rwctxs[0].TryPush(tssBlock)
|
||||
}
|
||||
|
||||
// We need to push tssBlock to multiple remote storages.
|
||||
|
|
@ -502,7 +525,7 @@ func pushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarsha
|
|||
}
|
||||
go func(rwctx *remoteWriteCtx, tss []prompbmarshal.TimeSeries) {
|
||||
defer wg.Done()
|
||||
if !rwctx.Push(tss) {
|
||||
if !rwctx.TryPush(tss) {
|
||||
atomic.StoreUint64(&anyPushFailed, 1)
|
||||
}
|
||||
}(rwctx, tssShard)
|
||||
|
|
@ -520,7 +543,7 @@ func pushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarsha
|
|||
for _, rwctx := range rwctxs {
|
||||
go func(rwctx *remoteWriteCtx) {
|
||||
defer wg.Done()
|
||||
if !rwctx.Push(tssBlock) {
|
||||
if !rwctx.TryPush(tssBlock) {
|
||||
atomic.StoreUint64(&anyPushFailed, 1)
|
||||
}
|
||||
}(rwctx)
|
||||
|
|
@ -629,9 +652,8 @@ type remoteWriteCtx struct {
|
|||
pss []*pendingSeries
|
||||
pssNextIdx uint64
|
||||
|
||||
rowsPushedAfterRelabel *metrics.Counter
|
||||
rowsDroppedByRelabel *metrics.Counter
|
||||
rowsDroppedAtAggregationOnPush *metrics.Counter
|
||||
rowsPushedAfterRelabel *metrics.Counter
|
||||
rowsDroppedByRelabel *metrics.Counter
|
||||
}
|
||||
|
||||
func newRemoteWriteCtx(argIdx int, remoteWriteURL *url.URL, maxInmemoryBlocks int, sanitizedURL string) *remoteWriteCtx {
|
||||
|
|
@ -654,9 +676,9 @@ func newRemoteWriteCtx(argIdx int, remoteWriteURL *url.URL, maxInmemoryBlocks in
|
|||
_ = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_pending_inmemory_blocks{path=%q, url=%q}`, queuePath, sanitizedURL), func() float64 {
|
||||
return float64(fq.GetInmemoryQueueLen())
|
||||
})
|
||||
_ = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_inmemory_queue_blocked{path=%q, url=%q}`, queuePath, sanitizedURL), func() float64 {
|
||||
if fq.IsWritesBlocked() {
|
||||
return 1.0
|
||||
_ = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_queue_blocked{path=%q, url=%q}`, queuePath, sanitizedURL), func() float64 {
|
||||
if fq.IsWriteBlocked() {
|
||||
return 1
|
||||
}
|
||||
return 0
|
||||
})
|
||||
|
|
@ -690,9 +712,8 @@ func newRemoteWriteCtx(argIdx int, remoteWriteURL *url.URL, maxInmemoryBlocks in
|
|||
c: c,
|
||||
pss: pss,
|
||||
|
||||
rowsPushedAfterRelabel: metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_rows_pushed_after_relabel_total{path=%q, url=%q}`, queuePath, sanitizedURL)),
|
||||
rowsDroppedByRelabel: metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_relabel_metrics_dropped_total{path=%q, url=%q}`, queuePath, sanitizedURL)),
|
||||
rowsDroppedAtAggregationOnPush: metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_aggregation_metrics_dropped_total{path=%q, url=%q}`, queuePath, sanitizedURL)),
|
||||
rowsPushedAfterRelabel: metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_rows_pushed_after_relabel_total{path=%q, url=%q}`, queuePath, sanitizedURL)),
|
||||
rowsDroppedByRelabel: metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_relabel_metrics_dropped_total{path=%q, url=%q}`, queuePath, sanitizedURL)),
|
||||
}
|
||||
|
||||
// Initialize sas
|
||||
|
|
@ -735,7 +756,7 @@ func (rwctx *remoteWriteCtx) MustStop() {
|
|||
rwctx.rowsDroppedByRelabel = nil
|
||||
}
|
||||
|
||||
func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) bool {
|
||||
func (rwctx *remoteWriteCtx) TryPush(tss []prompbmarshal.TimeSeries) bool {
|
||||
// Apply relabeling
|
||||
var rctx *relabelCtx
|
||||
var v *[]prompbmarshal.TimeSeries
|
||||
|
|
@ -773,16 +794,18 @@ func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) bool {
|
|||
}
|
||||
matchIdxsPool.Put(matchIdxs)
|
||||
}
|
||||
defer func() {
|
||||
// Return back relabeling contexts to the pool
|
||||
if rctx != nil {
|
||||
*v = prompbmarshal.ResetTimeSeries(tss)
|
||||
tssPool.Put(v)
|
||||
putRelabelCtx(rctx)
|
||||
}
|
||||
}()
|
||||
|
||||
return rwctx.pushInternal(tss)
|
||||
// Try pushing the data to remote storage
|
||||
ok := rwctx.tryPushInternal(tss)
|
||||
|
||||
// Return back relabeling contexts to the pool
|
||||
if rctx != nil {
|
||||
*v = prompbmarshal.ResetTimeSeries(tss)
|
||||
tssPool.Put(v)
|
||||
putRelabelCtx(rctx)
|
||||
}
|
||||
|
||||
return ok
|
||||
}
|
||||
|
||||
var matchIdxsPool bytesutil.ByteBufferPool
|
||||
|
|
@ -803,21 +826,22 @@ func dropAggregatedSeries(src []prompbmarshal.TimeSeries, matchIdxs []byte, drop
|
|||
}
|
||||
|
||||
func (rwctx *remoteWriteCtx) pushInternalTrackDropped(tss []prompbmarshal.TimeSeries) {
|
||||
if !rwctx.pushInternal(tss) {
|
||||
rwctx.rowsDroppedAtAggregationOnPush.Inc()
|
||||
if rwctx.tryPushInternal(tss) {
|
||||
return
|
||||
}
|
||||
if !*disableOnDiskQueue {
|
||||
logger.Panicf("BUG: tryPushInternal must return true if -remoteWrite.disableOnDiskQueue isn't set")
|
||||
}
|
||||
pushFailures.Inc()
|
||||
if *dropSamplesOnOverload {
|
||||
rowsCount := getRowsCount(tss)
|
||||
samplesDropped.Add(rowsCount)
|
||||
}
|
||||
}
|
||||
|
||||
func (rwctx *remoteWriteCtx) pushInternal(tss []prompbmarshal.TimeSeries) bool {
|
||||
func (rwctx *remoteWriteCtx) tryPushInternal(tss []prompbmarshal.TimeSeries) bool {
|
||||
var rctx *relabelCtx
|
||||
var v *[]prompbmarshal.TimeSeries
|
||||
defer func() {
|
||||
if rctx != nil {
|
||||
*v = prompbmarshal.ResetTimeSeries(tss)
|
||||
tssPool.Put(v)
|
||||
putRelabelCtx(rctx)
|
||||
}
|
||||
}()
|
||||
if len(labelsGlobal) > 0 {
|
||||
// Make a copy of tss before adding extra labels in order to prevent
|
||||
// from affecting time series for other remoteWrite.url configs.
|
||||
|
|
@ -829,7 +853,16 @@ func (rwctx *remoteWriteCtx) pushInternal(tss []prompbmarshal.TimeSeries) bool {
|
|||
|
||||
pss := rwctx.pss
|
||||
idx := atomic.AddUint64(&rwctx.pssNextIdx, 1) % uint64(len(pss))
|
||||
return pss[idx].Push(tss)
|
||||
|
||||
ok := pss[idx].TryPush(tss)
|
||||
|
||||
if rctx != nil {
|
||||
*v = prompbmarshal.ResetTimeSeries(tss)
|
||||
tssPool.Put(v)
|
||||
putRelabelCtx(rctx)
|
||||
}
|
||||
|
||||
return ok
|
||||
}
|
||||
|
||||
func (rwctx *remoteWriteCtx) reinitStreamAggr() {
|
||||
|
|
|
|||
|
|
@ -76,7 +76,7 @@ func insertRows(at *auth.Token, rows []parser.Row, extraLabels []prompbmarshal.L
|
|||
ctx.WriteRequest.Timeseries = tssDst
|
||||
ctx.Labels = labels
|
||||
ctx.Samples = samples
|
||||
if !remotewrite.Push(at, &ctx.WriteRequest) {
|
||||
if !remotewrite.TryPush(at, &ctx.WriteRequest) {
|
||||
return remotewrite.ErrQueueFullHTTPRetry
|
||||
}
|
||||
rowsInserted.Add(rowsTotal)
|
||||
|
|
|
|||
|
|
@ -97,9 +97,8 @@ func Init() {
|
|||
if len(*opentsdbHTTPListenAddr) > 0 {
|
||||
opentsdbhttpServer = opentsdbhttpserver.MustStart(*opentsdbHTTPListenAddr, *opentsdbHTTPUseProxyProtocol, opentsdbhttp.InsertHandler)
|
||||
}
|
||||
promscrape.Init(func(at *auth.Token, wr *prompbmarshal.WriteRequest) bool {
|
||||
promscrape.Init(func(at *auth.Token, wr *prompbmarshal.WriteRequest) {
|
||||
prompush.Push(wr)
|
||||
return true
|
||||
})
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@ The sandbox cluster installation is running under the constant load generated by
|
|||
|
||||
## tip
|
||||
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add `-remoteWrite.disableOnDiskQueue` command-line flag, which can be used for disabling data queuing to disk when the remote storage cannot keep up with the data ingestion rate. In this case `vmagent` returns `429 Too Many Requests` response, so clients could decrease data ingestion rate on their side. This option may be useful when `vmagent` runs in environments with slow persistent disks. See [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2110).
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add `-remoteWrite.disableOnDiskQueue` command-line flag, which can be used for disabling data queueing to disk when the remote storage cannot keep up with the data ingestion rate. See [these docs](https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence) and [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2110).
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add support for reading and writing samples via [Google PubSub](https://cloud.google.com/pubsub). See [these docs](https://docs.victoriametrics.com/vmagent.html#google-pubsub-integration).
|
||||
* FEATURE: reduce the default value for `-import.maxLineLen` command-line flag from 100MB to 10MB in order to prevent excessive memory usage during data import via [/api/v1/import](https://docs.victoriametrics.com/#how-to-import-data-in-json-line-format).
|
||||
|
||||
|
|
|
|||
112
docs/vmagent.md
112
docs/vmagent.md
|
|
@ -869,47 +869,43 @@ scrape_configs:
|
|||
- "Proxy-Auth: top-secret"
|
||||
```
|
||||
|
||||
## Disabling on-disk queue
|
||||
## Disabling on-disk persistence
|
||||
|
||||
On-disk queue aka persistent queue is a temporary folder configured via `-remoteWrite.tmpDataPath` flag. At this folder vmagent may store metric blocks.
|
||||
Metric blocks persisted on disk if remote storage is not available or cannot handle ingestion load.
|
||||
Size of this disk queue per remote storage can be limited via `-remoteWrite.maxDiskUsagePerURL`. By default, there is no limit.
|
||||
In case of reaching those limit metric blocks will be silently dropped by vmagent.
|
||||
By default `vmagent` stores pending data, which cannot be sent to the configured remote storage systems in a timely manner, in the folder configured
|
||||
via `-remoteWrite.tmpDataPath` command-line flag. By default `vmagent` writes all the pending data to this folder until this data is sent to the configured
|
||||
remote storage systems or until the folder becomes full. The maximum data size, which can be saved to `-remoteWrite.tmpDataPath`
|
||||
per every configured `-remoteWrite.url`, can be limited via `-remoteWrite.maxDiskUsagePerURL` command-line flag.
|
||||
When this limit is reached, `vmagent` drops the oldest data from disk in order to save newly ingested data.
|
||||
|
||||
This behaviour can be changed via flag `--remoteWrite.disableOnDiskQueue=true`.
|
||||
It prevents vmagent from using on-disk storage for data buffering during ingestion or scraping.
|
||||
But on-disk storage is still used for saving in-memory part of the queue and buffers during graceful shutdown.
|
||||
There are cases when it is better disabling on-disk persistence for pending data at `vmagent` side:
|
||||
|
||||
It's expected that `streaming` aggregation and `scrapping` metrics will be dropped in case of full queue.
|
||||
The following metrics help to detect samples drop: `vmagent_remotewrite_aggregation_metrics_dropped_total` and `vm_promscrape_push_samples_dropped_total`.
|
||||
- When the persistent disk performance isn't enough for the given data processing rate.
|
||||
- When it is better to buffer pending data at the client side instead of bufferring it at `vmagent` side in the `-remoteWrite.tmpDataPath` folder.
|
||||
- When the data is already buffered at [Kafka side](#reading-metrics-from-kafka) or [Google PubSub side](#pubsub-integration).
|
||||
- When it is better to drop pending data instead of buffering it.
|
||||
|
||||
In case of multiple configured remote storages, vmagent block writes requests even if a single remote storage cannot accept ingested samples.
|
||||
In this case `-remoteWrite.disableOnDiskQueue` command-line flag can be passed to `vmagent`.
|
||||
When this flag is specified, `vmagent` works in the following way if the configured remote storage systems cannot keep up with the data ingestion rate:
|
||||
|
||||
vmagent guarantees at-least-once delivery semantic.
|
||||
It means that metric samples duplication is possible and [deduplication](https://docs.victoriametrics.com/#deduplication) must be configured at remote storage.
|
||||
- It returns `429 Too Many Requests` HTTP error to clients, which send data to `vmagent` via [supported HTTP endpoints](#how-to-push-data-to-vmagent).
|
||||
You can specify `-remoteWrite.dropSamplesOnOverload` command-line flag in order to drop the ingested samples instead of returning the error to clients in this case.
|
||||
- It suspends consuming data from [Kafka side](#reading-metrics-from-kafka) or [Google PubSub side](#pubsub-integration) until the remote storage becomes available.
|
||||
You can specify `-remoteWrite.dropSamplesOnOverload` command-line flag in order to drop the fetched samples instead of suspending data consumption from Kafka or Google PubSub.
|
||||
- It drops samples [scraped from Prometheus-compatible targets](#how-to-collect-metrics-in-prometheus-format), because it is better to drop samples
|
||||
instead of blocking the scrape process.
|
||||
- It drops [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html) output samples, because it is better to drop output samples
|
||||
instead of blocking the stream aggregation process.
|
||||
|
||||
### Common patterns
|
||||
You may want to disable on-disk queue in the following cases:
|
||||
The number of dropped samples because of overloaded remote storage can be [monitored](#monitoring) via `vmagent_remotewrite_samples_dropped_total` metric.
|
||||
The number of unsuccessful attempts to send data to overloaded remote storage can be [monitored](#monitoring) via `vmagent_remotewrite_push_failures_total` metric.
|
||||
|
||||
1) chaining of vmagents. Intermediate vmagents used for aggregation may loss the data, if vmcluster is not available.
|
||||
With disabled persistent queue aggregation vmagents will back-pressure metrics to the first vmagent.
|
||||
`vmagent` still may write pending in-memory data to `-remoteWrite.tmpDataPath` on graceful shutdown
|
||||
if `-remoteWrite.disableOnDiskQueue` command-line flag is specified. It may also read buffered data from `-remoteWrite.tmpDataPath`
|
||||
on startup.
|
||||
|
||||
```mermaid
|
||||
flowchart LR
|
||||
A[vmagent] --> B(vmagent-aggregation-0)
|
||||
A[vmagent] --> C(vmagent-aggregation-1)
|
||||
B --> D[vmcluster]
|
||||
C --> D[vmcluster]
|
||||
```
|
||||
|
||||
2) If you want to replace actual on-disk queue with kafka or another compatible queue. On-disk queue must be disabled at `vmagent-consumer`
|
||||
|
||||
```mermaid
|
||||
flowchart LR
|
||||
A[vmagent] --> B(kafka)
|
||||
B <--> C(vmagent-consumer)
|
||||
C --> D[vmcluster]
|
||||
```
|
||||
When `-remoteWrite.disableOnDiskQueue` command-line flag is set, then `vmagent` may send the same samples multiple times to the configured remote storage
|
||||
if it cannot keep up with the data ingestion rate. In this case the [deduplication](https://docs.victoriametrics.com/#deduplication)
|
||||
must be enabled on all the configured remote storage systems.
|
||||
|
||||
## Cardinality limiter
|
||||
|
||||
|
|
@ -989,38 +985,39 @@ If you have suggestions for improvements or have found a bug - please open an is
|
|||
|
||||
## Troubleshooting
|
||||
|
||||
* We recommend you [set up the official Grafana dashboard](#monitoring) in order to monitor the state of `vmagent'.
|
||||
* It is recommended [setting up the official Grafana dashboard](#monitoring) in order to monitor the state of `vmagent'.
|
||||
|
||||
* We recommend you increase the maximum number of open files in the system (`ulimit -n`) when scraping a big number of targets,
|
||||
* It is recommended increasing the maximum number of open files in the system (`ulimit -n`) when scraping a big number of targets,
|
||||
as `vmagent` establishes at least a single TCP connection per target.
|
||||
|
||||
* If `vmagent` uses too big amounts of memory, then the following options can help:
|
||||
* Disabling staleness tracking with `-promscrape.noStaleMarkers` option. See [these docs](#prometheus-staleness-markers).
|
||||
* Enabling stream parsing mode if `vmagent` scrapes targets with millions of metrics per target. See [these docs](#stream-parsing-mode).
|
||||
* Reducing the number of output queues with `-remoteWrite.queues` command-line option.
|
||||
* Reducing the amounts of RAM vmagent can use for in-memory buffering with `-memory.allowedPercent` or `-memory.allowedBytes` command-line option.
|
||||
Another option is to reduce memory limits in Docker and/or Kubernetes if `vmagent` runs under these systems.
|
||||
* Reducing the number of CPU cores vmagent can use by passing `GOMAXPROCS=N` environment variable to `vmagent`,
|
||||
where `N` is the desired limit on CPU cores. Another option is to reduce CPU limits in Docker or Kubernetes if `vmagent` runs under these systems.
|
||||
* Passing `-promscrape.dropOriginalLabels` command-line option to `vmagent`, so it drops `"discoveredLabels"` and `"droppedTargets"`
|
||||
lists at `/api/v1/targets` page. This reduces memory usage when scraping big number of targets at the cost
|
||||
of reduced debuggability for improperly configured per-target relabeling.
|
||||
* Disabling staleness tracking with `-promscrape.noStaleMarkers` option. See [these docs](#prometheus-staleness-markers).
|
||||
* Enabling stream parsing mode if `vmagent` scrapes targets with millions of metrics per target. See [these docs](#stream-parsing-mode).
|
||||
* Reducing the number of tcp connections to remote storage systems with `-remoteWrite.queues` command-line option.
|
||||
* Passing `-promscrape.dropOriginalLabels` command-line option to `vmagent` if it [discovers](https://docs.victoriametrics.com/sd_configs.html)
|
||||
big number of targets and many of these targets are [dropped](https://docs.victoriametrics.com/relabeling.html#how-to-drop-discovered-targets)
|
||||
before scraping. In this case `vmagent` drops `"discoveredLabels"` and `"droppedTargets"`
|
||||
lists at `http://vmagent-host:8429/service-discovery` page. This reduces memory usage when scraping big number of targets at the cost
|
||||
of reduced debuggability for improperly configured per-target [relabeling](https://docs.victoriametrics.com/relabeling.html).
|
||||
|
||||
* When `vmagent` scrapes many unreliable targets, it can flood the error log with scrape errors. These errors can be suppressed
|
||||
by passing `-promscrape.suppressScrapeErrors` command-line flag to `vmagent`. The most recent scrape error per each target can be observed at `http://vmagent-host:8429/targets`
|
||||
and `http://vmagent-host:8429/api/v1/targets`.
|
||||
* When `vmagent` scrapes many unreliable targets, it can flood the error log with scrape errors. It is recommended investigating and fixing these errors.
|
||||
If it is unfeasible to fix all the reported errors, then they can be suppressed by passing `-promscrape.suppressScrapeErrors` command-line flag to `vmagent`.
|
||||
The most recent scrape error per each target can be observed at `http://vmagent-host:8429/targets` and `http://vmagent-host:8429/api/v1/targets`.
|
||||
|
||||
* The `/service-discovery` page could be useful for debugging relabeling process for scrape targets.
|
||||
* The `http://vmagent-host:8429/service-discovery` page could be useful for debugging relabeling process for scrape targets.
|
||||
This page contains original labels for targets dropped during relabeling.
|
||||
By default, the `-promscrape.maxDroppedTargets` targets are shown here. If your setup drops more targets during relabeling,
|
||||
then increase `-promscrape.maxDroppedTargets` command-line flag value to see all the dropped targets.
|
||||
Note that tracking each dropped target requires up to 10Kb of RAM. Therefore, big values for `-promscrape.maxDroppedTargets`
|
||||
may result in increased memory usage if a big number of scrape targets are dropped during relabeling.
|
||||
|
||||
* We recommend you increase `-remoteWrite.queues` if `vmagent_remotewrite_pending_data_bytes` metric exported
|
||||
at `http://vmagent-host:8429/metrics` page grows constantly. It is also recommended increasing `-remoteWrite.maxBlockSize`
|
||||
and `-remoteWrite.maxRowsPerBlock` command-line options in this case. This can improve data ingestion performance
|
||||
to the configured remote storage systems at the cost of higher memory usage.
|
||||
* It is recommended increaseing `-remoteWrite.queues` if `vmagent_remotewrite_pending_data_bytes` [metric](#monitoring)
|
||||
grows constantly. It is also recommended increasing `-remoteWrite.maxBlockSize` and `-remoteWrite.maxRowsPerBlock` command-line options in this case.
|
||||
This can improve data ingestion performance to the configured remote storage systems at the cost of higher memory usage.
|
||||
|
||||
* If you see gaps in the data pushed by `vmagent` to remote storage when `-remoteWrite.maxDiskUsagePerURL` is set,
|
||||
try increasing `-remoteWrite.queues`. Such gaps may appear because `vmagent` cannot keep up with sending the collected data to remote storage.
|
||||
|
|
@ -1034,8 +1031,12 @@ If you have suggestions for improvements or have found a bug - please open an is
|
|||
The best solution is to use remote storage with [backfilling support](https://docs.victoriametrics.com/#backfilling) such as VictoriaMetrics.
|
||||
|
||||
* `vmagent` buffers scraped data at the `-remoteWrite.tmpDataPath` directory until it is sent to `-remoteWrite.url`.
|
||||
The directory can grow large when remote storage is unavailable for extended periods of time and if `-remoteWrite.maxDiskUsagePerURL` isn't set.
|
||||
If you don't want to send all the data from the directory to remote storage then simply stop `vmagent` and delete the directory.
|
||||
The directory can grow large when remote storage is unavailable for extended periods of time and if the maximum directory size isn't limited
|
||||
with `-remoteWrite.maxDiskUsagePerURL` command-line flag.
|
||||
If you don't want to send all the buffered data from the directory to remote storage then simply stop `vmagent` and delete the directory.
|
||||
|
||||
* If `vmagent` runs on a host with slow persistent storage, which cannot keep up with the volume of processed samples, then is is possible to disable
|
||||
the persistent storage with `-remoteWrite.disableOnDiskQueue` command-line flag. See [these docs](#disabling-on-disk-persistence) for more details.
|
||||
|
||||
* By default `vmagent` masks `-remoteWrite.url` with `secret-url` values in logs and at `/metrics` page because
|
||||
the url may contain sensitive information such as auth tokens or passwords.
|
||||
|
|
@ -1080,7 +1081,7 @@ If you have suggestions for improvements or have found a bug - please open an is
|
|||
regex: true
|
||||
```
|
||||
|
||||
See also [troubleshooting docs](https://docs.victoriametrics.com/Troubleshooting.html).
|
||||
See also [general troubleshooting docs](https://docs.victoriametrics.com/Troubleshooting.html).
|
||||
|
||||
## Google PubSub integration
|
||||
[Enterprise version](https://docs.victoriametrics.com/enterprise.html) of `vmagent` can read and write metrics from / to google [PubSub](https://cloud.google.com/pubsub):
|
||||
|
|
@ -1789,8 +1790,9 @@ See the docs at https://docs.victoriametrics.com/vmagent.html .
|
|||
Optional path to bearer token file to use for the corresponding -remoteWrite.url. The token is re-read from the file every second
|
||||
Supports an array of values separated by comma or specified via multiple flags.
|
||||
-remoteWrite.disableOnDiskQueue
|
||||
Whether to disable on-disk queue for metrics ingestion processing. If in-memory queue is full for at least 1 remoteWrite target, all data ingestion is blocked and returns an error.
|
||||
It allows to build a chain of vmagents and build complicated data pipelines without data-loss. On-disk writes is still possible during graceful shutdown for storing in-memory part of the queue.
|
||||
Whether to disable storing pending data to -remoteWrite.tmpDataPath when the configured remote storage systems cannot keep up with the data ingestion rate. See https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence .See also -remoteWrite.dropSamplesOnOverload
|
||||
-remoteWrite.dropSamplesOnOverload
|
||||
Whether to drop samples when -remoteWrite.disableOnDiskQueue is set and if the samples cannot be pushed into the configured remote storage systems in a timely manner. See https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence
|
||||
-remoteWrite.flushInterval duration
|
||||
Interval for flushing the data to remote storage. This option takes effect only when less than 10K data points per second are pushed to -remoteWrite.url (default 1s)
|
||||
-remoteWrite.forcePromProto array
|
||||
|
|
@ -1892,7 +1894,7 @@ See the docs at https://docs.victoriametrics.com/vmagent.html .
|
|||
Optional TLS server name to use for connections to the corresponding -remoteWrite.url. By default, the server name from -remoteWrite.url is used
|
||||
Supports an array of values separated by comma or specified via multiple flags.
|
||||
-remoteWrite.tmpDataPath string
|
||||
Path to directory where temporary data for remote write component is stored. See also -remoteWrite.maxDiskUsagePerURL (default "vmagent-remotewrite-data")
|
||||
Path to directory for storing pending data, which isn't sent to the configured -remoteWrite.url . See also -remoteWrite.maxDiskUsagePerURL and -remoteWrite.disableOnDiskQueue (default "vmagent-remotewrite-data")
|
||||
-remoteWrite.url array
|
||||
Remote storage URL to write data to. It must support either VictoriaMetrics remote write protocol or Prometheus remote_write protocol. Example url: http://<victoriametrics-host>:8428/api/v1/write . Pass multiple -remoteWrite.url options in order to replicate the collected data to multiple remote storage systems. The data can be sharded among the configured remote storage systems if -remoteWrite.shardByURL flag is set. See also -remoteWrite.multitenantURL
|
||||
Supports an array of values separated by comma or specified via multiple flags.
|
||||
|
|
|
|||
|
|
@ -22,7 +22,9 @@ type FastQueue struct {
|
|||
// or when MustClose is called.
|
||||
cond sync.Cond
|
||||
|
||||
// isPQDisabled is set to true when pq is disabled.
|
||||
isPQDisabled bool
|
||||
|
||||
// pq is file-based queue
|
||||
pq *queue
|
||||
|
||||
|
|
@ -43,7 +45,7 @@ type FastQueue struct {
|
|||
// if maxPendingBytes is 0, then the queue size is unlimited.
|
||||
// Otherwise its size is limited by maxPendingBytes. The oldest data is dropped when the queue
|
||||
// reaches maxPendingSize.
|
||||
// if isPQDisabled is set to true, all write requests that exceed in-memory buffer capacity'll be rejected with errQueueIsFull error
|
||||
// if isPQDisabled is set to true, then write requests that exceed in-memory buffer capacity are rejected.
|
||||
// in-memory queue part can be stored on disk during gracefull shutdown.
|
||||
func MustOpenFastQueue(path, name string, maxInmemoryBlocks int, maxPendingBytes int64, isPQDisabled bool) *FastQueue {
|
||||
pq := mustOpen(path, name, maxPendingBytes)
|
||||
|
|
@ -65,8 +67,8 @@ func MustOpenFastQueue(path, name string, maxInmemoryBlocks int, maxPendingBytes
|
|||
return fq
|
||||
}
|
||||
|
||||
// IsWritesBlocked checks if data can be pushed into the queue
|
||||
func (fq *FastQueue) IsWritesBlocked() bool {
|
||||
// IsWriteBlocked checks if data can be pushed into fq
|
||||
func (fq *FastQueue) IsWriteBlocked() bool {
|
||||
if !fq.isPQDisabled {
|
||||
return false
|
||||
}
|
||||
|
|
@ -132,11 +134,6 @@ func (fq *FastQueue) flushInmemoryBlocksToFileLocked() {
|
|||
func (fq *FastQueue) GetPendingBytes() uint64 {
|
||||
fq.mu.Lock()
|
||||
defer fq.mu.Unlock()
|
||||
return fq.getPendingBytesLocked()
|
||||
}
|
||||
|
||||
func (fq *FastQueue) getPendingBytesLocked() uint64 {
|
||||
|
||||
n := fq.pendingInmemoryBytes
|
||||
n += fq.pq.GetPendingBytes()
|
||||
return n
|
||||
|
|
@ -150,49 +147,53 @@ func (fq *FastQueue) GetInmemoryQueueLen() int {
|
|||
return len(fq.ch)
|
||||
}
|
||||
|
||||
// MustWriteBlockIgnoreDisabledPQ writes block to fq, persists data on disk even if persistent disabled by flag.
|
||||
// it's needed to gracefully stop service and do not lose data if remote storage is not available.
|
||||
// MustWriteBlockIgnoreDisabledPQ unconditionally writes block to fq.
|
||||
//
|
||||
// This method allows perisisting in-memory blocks during graceful shutdown, even if persistence is disabled.
|
||||
func (fq *FastQueue) MustWriteBlockIgnoreDisabledPQ(block []byte) {
|
||||
if !fq.writeBlock(block, true) {
|
||||
logger.Fatalf("BUG: MustWriteBlockIgnoreDisabledPQ must always write data even if persistence is disabled")
|
||||
if !fq.tryWriteBlock(block, true) {
|
||||
logger.Fatalf("BUG: tryWriteBlock must always write data even if persistence is disabled")
|
||||
}
|
||||
}
|
||||
|
||||
// WriteBlock writes block to fq.
|
||||
func (fq *FastQueue) WriteBlock(block []byte) bool {
|
||||
return fq.writeBlock(block, false)
|
||||
// TryWriteBlock tries writing block to fq.
|
||||
//
|
||||
// false is returned if the block couldn't be written to fq when the in-memory queue is full
|
||||
// and the persistent queue is disabled.
|
||||
func (fq *FastQueue) TryWriteBlock(block []byte) bool {
|
||||
return fq.tryWriteBlock(block, false)
|
||||
}
|
||||
|
||||
// WriteBlock writes block to fq.
|
||||
func (fq *FastQueue) writeBlock(block []byte, mustIgnoreDisabledPQ bool) bool {
|
||||
func (fq *FastQueue) tryWriteBlock(block []byte, ignoreDisabledPQ bool) bool {
|
||||
fq.mu.Lock()
|
||||
defer fq.mu.Unlock()
|
||||
|
||||
isPQWritesAllowed := !fq.isPQDisabled || mustIgnoreDisabledPQ
|
||||
isPQWriteAllowed := !fq.isPQDisabled || ignoreDisabledPQ
|
||||
|
||||
fq.flushInmemoryBlocksToFileIfNeededLocked()
|
||||
if n := fq.pq.GetPendingBytes(); n > 0 {
|
||||
if !isPQWritesAllowed {
|
||||
return false
|
||||
}
|
||||
// The file-based queue isn't drained yet. This means that in-memory queue cannot be used yet.
|
||||
// So put the block to file-based queue.
|
||||
if len(fq.ch) > 0 {
|
||||
logger.Panicf("BUG: the in-memory queue must be empty when the file-based queue is non-empty; it contains %d pending bytes", n)
|
||||
}
|
||||
if !isPQWriteAllowed {
|
||||
return false
|
||||
}
|
||||
fq.pq.MustWriteBlock(block)
|
||||
return true
|
||||
}
|
||||
if len(fq.ch) == cap(fq.ch) {
|
||||
// There is no space in the in-memory queue. Put the data to file-based queue.
|
||||
if !isPQWritesAllowed {
|
||||
// There is no space left in the in-memory queue. Put the data to file-based queue.
|
||||
if !isPQWriteAllowed {
|
||||
return false
|
||||
}
|
||||
fq.flushInmemoryBlocksToFileLocked()
|
||||
fq.pq.MustWriteBlock(block)
|
||||
return true
|
||||
}
|
||||
// There is enough space in the in-memory queue.
|
||||
// Fast path - put the block to in-memory queue.
|
||||
bb := blockBufPool.Get()
|
||||
bb.B = append(bb.B[:0], block...)
|
||||
fq.ch <- bb
|
||||
|
|
|
|||
|
|
@ -11,7 +11,7 @@ func TestFastQueueOpenClose(_ *testing.T) {
|
|||
path := "fast-queue-open-close"
|
||||
mustDeleteDir(path)
|
||||
for i := 0; i < 10; i++ {
|
||||
fq := MustOpenFastQueue(path, "foobar", 100, 0, true)
|
||||
fq := MustOpenFastQueue(path, "foobar", 100, 0, false)
|
||||
fq.MustClose()
|
||||
}
|
||||
mustDeleteDir(path)
|
||||
|
|
@ -22,15 +22,15 @@ func TestFastQueueWriteReadInmemory(t *testing.T) {
|
|||
mustDeleteDir(path)
|
||||
|
||||
capacity := 100
|
||||
fq := MustOpenFastQueue(path, "foobar", capacity, 0, true)
|
||||
fq := MustOpenFastQueue(path, "foobar", capacity, 0, false)
|
||||
if n := fq.GetInmemoryQueueLen(); n != 0 {
|
||||
t.Fatalf("unexpected non-zero inmemory queue size: %d", n)
|
||||
}
|
||||
var blocks []string
|
||||
for i := 0; i < capacity; i++ {
|
||||
block := fmt.Sprintf("block %d", i)
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
blocks = append(blocks, block)
|
||||
}
|
||||
|
|
@ -62,8 +62,8 @@ func TestFastQueueWriteReadMixed(t *testing.T) {
|
|||
var blocks []string
|
||||
for i := 0; i < 2*capacity; i++ {
|
||||
block := fmt.Sprintf("block %d", i)
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("not expected WriteBlock fail")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
blocks = append(blocks, block)
|
||||
}
|
||||
|
|
@ -98,8 +98,8 @@ func TestFastQueueWriteReadWithCloses(t *testing.T) {
|
|||
var blocks []string
|
||||
for i := 0; i < 2*capacity; i++ {
|
||||
block := fmt.Sprintf("block %d", i)
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
|
||||
blocks = append(blocks, block)
|
||||
|
|
@ -176,8 +176,8 @@ func TestFastQueueReadUnblockByWrite(t *testing.T) {
|
|||
}
|
||||
resultCh <- nil
|
||||
}()
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
select {
|
||||
case err := <-resultCh:
|
||||
|
|
@ -235,9 +235,8 @@ func TestFastQueueReadWriteConcurrent(t *testing.T) {
|
|||
go func() {
|
||||
defer writersWG.Done()
|
||||
for block := range blocksCh {
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Errorf("unexpected false for WriteBlock")
|
||||
return
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
panic(fmt.Errorf("TryWriteBlock must return true in this context"))
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
|
@ -303,12 +302,12 @@ func TestFastQueueWriteReadWithDisabledPQ(t *testing.T) {
|
|||
var blocks []string
|
||||
for i := 0; i < capacity; i++ {
|
||||
block := fmt.Sprintf("block %d", i)
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
blocks = append(blocks, block)
|
||||
}
|
||||
if fq.WriteBlock([]byte("error-block")) {
|
||||
if fq.TryWriteBlock([]byte("error-block")) {
|
||||
t.Fatalf("expect false due to full queue")
|
||||
}
|
||||
|
||||
|
|
@ -339,12 +338,12 @@ func TestFastQueueWriteReadWithIgnoreDisabledPQ(t *testing.T) {
|
|||
var blocks []string
|
||||
for i := 0; i < capacity; i++ {
|
||||
block := fmt.Sprintf("block %d", i)
|
||||
if !fq.WriteBlock([]byte(block)) {
|
||||
t.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock([]byte(block)) {
|
||||
t.Fatalf("TryWriteBlock must return true in this context")
|
||||
}
|
||||
blocks = append(blocks, block)
|
||||
}
|
||||
if fq.WriteBlock([]byte("error-block")) {
|
||||
if fq.TryWriteBlock([]byte("error-block")) {
|
||||
t.Fatalf("expect false due to full queue")
|
||||
}
|
||||
for i := 0; i < capacity; i++ {
|
||||
|
|
|
|||
|
|
@ -22,7 +22,7 @@ func BenchmarkFastQueueThroughputSerial(b *testing.B) {
|
|||
mustDeleteDir(path)
|
||||
}()
|
||||
for i := 0; i < b.N; i++ {
|
||||
writeReadIterationFastQueue(b, fq, block, iterationsCount)
|
||||
writeReadIterationFastQueue(fq, block, iterationsCount)
|
||||
}
|
||||
})
|
||||
}
|
||||
|
|
@ -44,17 +44,17 @@ func BenchmarkFastQueueThroughputConcurrent(b *testing.B) {
|
|||
}()
|
||||
b.RunParallel(func(pb *testing.PB) {
|
||||
for pb.Next() {
|
||||
writeReadIterationFastQueue(b, fq, block, iterationsCount)
|
||||
writeReadIterationFastQueue(fq, block, iterationsCount)
|
||||
}
|
||||
})
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func writeReadIterationFastQueue(b *testing.B, fq *FastQueue, block []byte, iterationsCount int) {
|
||||
func writeReadIterationFastQueue(fq *FastQueue, block []byte, iterationsCount int) {
|
||||
for i := 0; i < iterationsCount; i++ {
|
||||
if !fq.WriteBlock(block) {
|
||||
b.Fatalf("unexpected false for WriteBlock")
|
||||
if !fq.TryWriteBlock(block) {
|
||||
panic(fmt.Errorf("TryWriteBlock must return true"))
|
||||
}
|
||||
}
|
||||
var ok bool
|
||||
|
|
|
|||
|
|
@ -59,18 +59,13 @@ func CheckConfig() error {
|
|||
// Init initializes Prometheus scraper with config from the `-promscrape.config`.
|
||||
//
|
||||
// Scraped data is passed to pushData.
|
||||
func Init(pushData func(at *auth.Token, wr *prompbmarshal.WriteRequest) bool) {
|
||||
func Init(pushData func(at *auth.Token, wr *prompbmarshal.WriteRequest)) {
|
||||
mustInitClusterMemberID()
|
||||
pushDataTrackDropped := func(at *auth.Token, wr *prompbmarshal.WriteRequest) {
|
||||
if !pushData(at, wr) {
|
||||
pushDataFailsTotal.Inc()
|
||||
}
|
||||
}
|
||||
globalStopChan = make(chan struct{})
|
||||
scraperWG.Add(1)
|
||||
go func() {
|
||||
defer scraperWG.Done()
|
||||
runScraper(*promscrapeConfigFile, pushDataTrackDropped, globalStopChan)
|
||||
runScraper(*promscrapeConfigFile, pushData, globalStopChan)
|
||||
}()
|
||||
}
|
||||
|
||||
|
|
@ -89,8 +84,6 @@ var (
|
|||
|
||||
// configData contains -promscrape.config data
|
||||
configData atomic.Pointer[[]byte]
|
||||
|
||||
pushDataFailsTotal = metrics.NewCounter(`vm_promscrape_push_samples_dropped_total`)
|
||||
)
|
||||
|
||||
// WriteConfigData writes -promscrape.config contents to w
|
||||
|
|
|
|||
Loading…
Reference in a new issue