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app/vmagent/remotewrite/remotewrite.go: make remoteWriteCtx.TryPush code easier to follow

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Move the code responsible for relabelCtx clearing into deferred function.
This allows making more clear the remoteWriteCtx.TryPush code.

This is a follow-up for 879771808b

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6205

While at it, clarify the description of the bugfix at docs/CHANGELOG.md
This commit is contained in:
Aliaksandr Valialkin 2024-07-03 14:12:41 +02:00
parent f406764ccc
commit 4268a310c1
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GPG Key ID: 52C003EE2BCDB9EB
2 changed files with 33 additions and 31 deletions
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62
app/vmagent/remotewrite/remotewrite.go
View File

@ -848,7 +848,7 @@ func newRemoteWriteCtx(argIdx int, remoteWriteURL *url.URL, maxInmemoryBlocks in
func (rwctx *remoteWriteCtx) MustStop() {
// sas and deduplicator must be stopped before rwctx is closed
// because sas can write pending series to rwctx.pss if there are any
// because they can write pending series to rwctx.pss if there are any
sas := rwctx.sas.Swap(nil)
sas.MustStop()
@ -875,12 +875,20 @@ func (rwctx *remoteWriteCtx) MustStop() {
// TryPush sends tss series to the configured remote write endpoint
//
// TryPush can be called concurrently for multiple remoteWriteCtx,
// so it shouldn't modify tss entries.
// TryPush doesn't modify tss, so tss can be passed concurrently to TryPush across distinct rwctx instances.
func (rwctx *remoteWriteCtx) TryPush(tss []prompbmarshal.TimeSeries, forceDropSamplesOnFailure bool) bool {
// Apply relabeling
var rctx *relabelCtx
var v *[]prompbmarshal.TimeSeries
defer func() {
if rctx == nil {
return
}
*v = prompbmarshal.ResetTimeSeries(tss)
tssPool.Put(v)
putRelabelCtx(rctx)
}()
// Apply relabeling
rcs := allRelabelConfigs.Load()
pcs := rcs.perURL[rwctx.idx]
if pcs.Len() > 0 {
@ -916,28 +924,21 @@ func (rwctx *remoteWriteCtx) TryPush(tss []prompbmarshal.TimeSeries, forceDropSa
matchIdxsPool.Put(matchIdxs)
} else if rwctx.deduplicator != nil {
rwctx.deduplicator.Push(tss)
tss = tss[:0]
return true
}
// 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)
// Try pushing tss to remote storage
if rwctx.tryPushInternal(tss) {
return true
}
if !ok {
rwctx.pushFailures.Inc()
if forceDropSamplesOnFailure || rwctx.dropSamplesOnOverload {
rwctx.rowsDroppedOnPushFailure.Add(len(tss))
return true
}
// Couldn't push tss to remote storage
rwctx.pushFailures.Inc()
if forceDropSamplesOnFailure || rwctx.dropSamplesOnOverload {
rwctx.rowsDroppedOnPushFailure.Add(len(tss))
return true
}
return ok
return false
}
var matchIdxsPool bytesutil.ByteBufferPool
@ -974,6 +975,15 @@ func (rwctx *remoteWriteCtx) pushInternalTrackDropped(tss []prompbmarshal.TimeSe
func (rwctx *remoteWriteCtx) tryPushInternal(tss []prompbmarshal.TimeSeries) bool {
var rctx *relabelCtx
var v *[]prompbmarshal.TimeSeries
defer func() {
if rctx == nil {
return
}
*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.
@ -986,15 +996,7 @@ func (rwctx *remoteWriteCtx) tryPushInternal(tss []prompbmarshal.TimeSeries) boo
pss := rwctx.pss
idx := rwctx.pssNextIdx.Add(1) % uint64(len(pss))
ok := pss[idx].TryPush(tss)
if rctx != nil {
*v = prompbmarshal.ResetTimeSeries(tss)
tssPool.Put(v)
putRelabelCtx(rctx)
}
return ok
return pss[idx].TryPush(tss)
}
var tssPool = &sync.Pool{

2
docs/CHANGELOG.md
View File

@ -129,7 +129,7 @@ Released at 2024-06-07
* BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): fix calendar display when `UTC+00:00` timezone is set. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6239).
* BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): remove redundant requests on the `Explore Cardinality` page. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6240).
* BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): fix handling of URL params for browser history navigation (back and forward buttons). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6126) and [this comment](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5516#issuecomment-1867507232).
* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent/): prevent potential panic during [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html) if more than one `--remoteWrite.streamAggr.dedupInterval` is configured. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6205).
* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent/): prevent potential panic during [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html) when more than one `-remoteWrite.url` command-line flags are passed to `vmagent` together with non-zero `-remoteWrite.streamAggr.dedupInterval` command-line flag. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6205).
* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent/): skip empty data blocks before sending to the remote write destination. Thanks to @viperstars for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6241).
* BUGFIX: [stream aggregation](https://docs.victoriametrics.com/stream-aggregation/): set correct suffix `<output>_prometheus` for aggregation outputs [increase_prometheus](https://docs.victoriametrics.com/stream-aggregation/#increase_prometheus) and [total_prometheus](https://docs.victoriametrics.com/stream-aggregation/#total_prometheus). Before, outputs `total` and `total_prometheus` or `increase` and `increase_prometheus` had the same suffix.
* BUGFIX: [stream aggregation](https://docs.victoriametrics.com/stream-aggregation/): prevent from excessive resource usage when stream aggregation config file is empty.