VictoriaMetrics/app/vmagent/remotewrite/remotewrite.go
Aliaksandr Valialkin fedaaf6d04
app/vmagent/remotewrite: do not drop persistent queues when -remoteWrite.multitenantURL is set
It is unsafe to drop persistent queues when -remoteWrite.multitenantURL command-line flag is set,
since these queues are created on demand when a new sample for the given tenant is pushed
to the remote storage.

This addresses https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5357
The issue has been appeared in the commit f3a51e8b1d
when implementing https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4014
2023-11-23 20:48:34 +02:00

814 lines
31 KiB
Go

package remotewrite
import (
"flag"
"fmt"
"net/url"
"path/filepath"
"strconv"
"sync"
"sync/atomic"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bloomfilter"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/memory"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/persistentqueue"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/streamaggr"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/tenantmetrics"
"github.com/VictoriaMetrics/metrics"
"github.com/cespare/xxhash/v2"
)
var (
remoteWriteURLs = flagutil.NewArrayString("remoteWrite.url", "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")
remoteWriteMultitenantURLs = flagutil.NewArrayString("remoteWrite.multitenantURL", "Base path for multitenant remote storage URL to write data to. "+
"See https://docs.victoriametrics.com/vmagent.html#multitenancy for details. Example url: http://<vminsert>:8480 . "+
"Pass multiple -remoteWrite.multitenantURL flags in order to replicate data to multiple remote storage systems. See also -remoteWrite.url")
shardByURL = flag.Bool("remoteWrite.shardByURL", false, "Whether to shard outgoing series across all the remote storage systems enumerated via -remoteWrite.url . "+
"By default the data is replicated across all the -remoteWrite.url . See https://docs.victoriametrics.com/vmagent.html#sharding-among-remote-storages")
tmpDataPath = flag.String("remoteWrite.tmpDataPath", "vmagent-remotewrite-data", "Path to directory where temporary data for remote write component is stored. "+
"See also -remoteWrite.maxDiskUsagePerURL")
keepDanglingQueues = flag.Bool("remoteWrite.keepDanglingQueues", false, "Keep persistent queues contents at -remoteWrite.tmpDataPath in case there are no matching -remoteWrite.url. "+
"Useful when -remoteWrite.url is changed temporarily and persistent queue files will be needed later on.")
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 "+
"isn't enough for sending high volume of collected data to remote storage. Default value is 2 * numberOfAvailableCPUs")
showRemoteWriteURL = flag.Bool("remoteWrite.showURL", false, "Whether to show -remoteWrite.url in the exported metrics. "+
"It is hidden by default, since it can contain sensitive info such as auth key")
maxPendingBytesPerURL = flagutil.NewArrayBytes("remoteWrite.maxDiskUsagePerURL", 0, "The maximum file-based buffer size in bytes at -remoteWrite.tmpDataPath "+
"for each -remoteWrite.url. When buffer size reaches the configured maximum, then old data is dropped when adding new data to the buffer. "+
"Buffered data is stored in ~500MB chunks. It is recommended to set the value for this flag to a multiple of the block size 500MB. "+
"Disk usage is unlimited if the value is set to 0")
significantFigures = flagutil.NewArrayInt("remoteWrite.significantFigures", 0, "The number of significant figures to leave in metric values before writing them "+
"to remote storage. See https://en.wikipedia.org/wiki/Significant_figures . Zero value saves all the significant figures. "+
"This option may be used for improving data compression for the stored metrics. See also -remoteWrite.roundDigits")
roundDigits = flagutil.NewArrayInt("remoteWrite.roundDigits", 100, "Round metric values to this number of decimal digits after the point before "+
"writing them to remote storage. "+
"Examples: -remoteWrite.roundDigits=2 would round 1.236 to 1.24, while -remoteWrite.roundDigits=-1 would round 126.78 to 130. "+
"By default, digits rounding is disabled. Set it to 100 for disabling it for a particular remote storage. "+
"This option may be used for improving data compression for the stored metrics")
sortLabels = flag.Bool("sortLabels", false, `Whether to sort labels for incoming samples before writing them to all the configured remote storage systems. `+
`This may be needed for reducing memory usage at remote storage when the order of labels in incoming samples is random. `+
`For example, if m{k1="v1",k2="v2"} may be sent as m{k2="v2",k1="v1"}`+
`Enabled sorting for labels can slow down ingestion performance a bit`)
maxHourlySeries = flag.Int("remoteWrite.maxHourlySeries", 0, "The maximum number of unique series vmagent can send to remote storage systems during the last hour. "+
"Excess series are logged and dropped. This can be useful for limiting series cardinality. See https://docs.victoriametrics.com/vmagent.html#cardinality-limiter")
maxDailySeries = flag.Int("remoteWrite.maxDailySeries", 0, "The maximum number of unique series vmagent can send to remote storage systems during the last 24 hours. "+
"Excess series are logged and dropped. This can be useful for limiting series churn rate. See https://docs.victoriametrics.com/vmagent.html#cardinality-limiter")
streamAggrConfig = flagutil.NewArrayString("remoteWrite.streamAggr.config", "Optional path to file with stream aggregation config. "+
"See https://docs.victoriametrics.com/stream-aggregation.html . "+
"See also -remoteWrite.streamAggr.keepInput, -remoteWrite.streamAggr.dropInput and -remoteWrite.streamAggr.dedupInterval")
streamAggrKeepInput = flagutil.NewArrayBool("remoteWrite.streamAggr.keepInput", "Whether to keep all the input samples after the aggregation "+
"with -remoteWrite.streamAggr.config. By default, only aggregates samples are dropped, while the remaining samples "+
"are written to the corresponding -remoteWrite.url . See also -remoteWrite.streamAggr.dropInput and https://docs.victoriametrics.com/stream-aggregation.html")
streamAggrDropInput = flagutil.NewArrayBool("remoteWrite.streamAggr.dropInput", "Whether to drop all the input samples after the aggregation "+
"with -remoteWrite.streamAggr.config. By default, only aggregates samples are dropped, while the remaining samples "+
"are written to the corresponding -remoteWrite.url . See also -remoteWrite.streamAggr.keepInput and https://docs.victoriametrics.com/stream-aggregation.html")
streamAggrDedupInterval = flagutil.NewArrayDuration("remoteWrite.streamAggr.dedupInterval", 0, "Input samples are de-duplicated with this interval before being aggregated. "+
"Only the last sample per each time series per each interval is aggregated if the interval is greater than zero")
)
var (
// rwctxsDefault contains statically populated entries when -remoteWrite.url is specified.
rwctxsDefault []*remoteWriteCtx
// rwctxsMap contains dynamically populated entries when -remoteWrite.multitenantURL is specified.
rwctxsMap = make(map[tenantmetrics.TenantID][]*remoteWriteCtx)
rwctxsMapLock sync.Mutex
// Data without tenant id is written to defaultAuthToken if -remoteWrite.multitenantURL is specified.
defaultAuthToken = &auth.Token{}
)
// MultitenancyEnabled returns true if -remoteWrite.multitenantURL is specified.
func MultitenancyEnabled() bool {
return len(*remoteWriteMultitenantURLs) > 0
}
// Contains the current relabelConfigs.
var allRelabelConfigs atomic.Pointer[relabelConfigs]
// maxQueues limits the maximum value for `-remoteWrite.queues`. There is no sense in setting too high value,
// since it may lead to high memory usage due to big number of buffers.
var maxQueues = cgroup.AvailableCPUs() * 16
const persistentQueueDirname = "persistent-queue"
// InitSecretFlags must be called after flag.Parse and before any logging.
func InitSecretFlags() {
if !*showRemoteWriteURL {
// remoteWrite.url can contain authentication codes, so hide it at `/metrics` output.
flagutil.RegisterSecretFlag("remoteWrite.url")
}
}
// Init initializes remotewrite.
//
// It must be called after flag.Parse().
//
// Stop must be called for graceful shutdown.
func Init() {
if len(*remoteWriteURLs) == 0 && len(*remoteWriteMultitenantURLs) == 0 {
logger.Fatalf("at least one `-remoteWrite.url` or `-remoteWrite.multitenantURL` command-line flag must be set")
}
if len(*remoteWriteURLs) > 0 && len(*remoteWriteMultitenantURLs) > 0 {
logger.Fatalf("cannot set both `-remoteWrite.url` and `-remoteWrite.multitenantURL` command-line flags")
}
if *maxHourlySeries > 0 {
hourlySeriesLimiter = bloomfilter.NewLimiter(*maxHourlySeries, time.Hour)
_ = metrics.NewGauge(`vmagent_hourly_series_limit_max_series`, func() float64 {
return float64(hourlySeriesLimiter.MaxItems())
})
_ = metrics.NewGauge(`vmagent_hourly_series_limit_current_series`, func() float64 {
return float64(hourlySeriesLimiter.CurrentItems())
})
}
if *maxDailySeries > 0 {
dailySeriesLimiter = bloomfilter.NewLimiter(*maxDailySeries, 24*time.Hour)
_ = metrics.NewGauge(`vmagent_daily_series_limit_max_series`, func() float64 {
return float64(dailySeriesLimiter.MaxItems())
})
_ = metrics.NewGauge(`vmagent_daily_series_limit_current_series`, func() float64 {
return float64(dailySeriesLimiter.CurrentItems())
})
}
if *queues > maxQueues {
*queues = maxQueues
}
if *queues <= 0 {
*queues = 1
}
initLabelsGlobal()
// Register SIGHUP handler for config reload before loadRelabelConfigs.
// This guarantees that the config will be re-read if the signal arrives just after loadRelabelConfig.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1240
sighupCh := procutil.NewSighupChan()
rcs, err := loadRelabelConfigs()
if err != nil {
logger.Fatalf("cannot load relabel configs: %s", err)
}
allRelabelConfigs.Store(rcs)
relabelConfigSuccess.Set(1)
relabelConfigTimestamp.Set(fasttime.UnixTimestamp())
if len(*remoteWriteURLs) > 0 {
rwctxsDefault = newRemoteWriteCtxs(nil, *remoteWriteURLs)
}
dropDanglingQueues()
// Start config reloader.
configReloaderWG.Add(1)
go func() {
defer configReloaderWG.Done()
for {
select {
case <-sighupCh:
case <-configReloaderStopCh:
return
}
reloadRelabelConfigs()
reloadStreamAggrConfigs()
}
}()
}
func dropDanglingQueues() {
if *keepDanglingQueues {
return
}
if len(*remoteWriteMultitenantURLs) > 0 {
// Do not drop dangling queues for *remoteWriteMultitenantURLs, since it is impossible to determine
// unused queues for multitenant urls - they are created on demand when new sample for the given
// tenant is pushed to remote storage.
return
}
// Remove dangling persistent queues, if any.
// This is required for the case when the number of queues has been changed or URL have been changed.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4014
//
existingQueues := make(map[string]struct{}, len(rwctxsDefault))
for _, rwctx := range rwctxsDefault {
existingQueues[rwctx.fq.Dirname()] = struct{}{}
}
queuesDir := filepath.Join(*tmpDataPath, persistentQueueDirname)
files := fs.MustReadDir(queuesDir)
removed := 0
for _, f := range files {
dirname := f.Name()
if _, ok := existingQueues[dirname]; !ok {
logger.Infof("removing dangling queue %q", dirname)
fullPath := filepath.Join(queuesDir, dirname)
fs.MustRemoveAll(fullPath)
removed++
}
}
if removed > 0 {
logger.Infof("removed %d dangling queues from %q, active queues: %d", removed, *tmpDataPath, len(rwctxsDefault))
}
}
func reloadRelabelConfigs() {
relabelConfigReloads.Inc()
logger.Infof("reloading relabel configs pointed by -remoteWrite.relabelConfig and -remoteWrite.urlRelabelConfig")
rcs, err := loadRelabelConfigs()
if err != nil {
relabelConfigReloadErrors.Inc()
relabelConfigSuccess.Set(0)
logger.Errorf("cannot reload relabel configs; preserving the previous configs; error: %s", err)
return
}
allRelabelConfigs.Store(rcs)
relabelConfigSuccess.Set(1)
relabelConfigTimestamp.Set(fasttime.UnixTimestamp())
logger.Infof("successfully reloaded relabel configs")
}
var (
relabelConfigReloads = metrics.NewCounter(`vmagent_relabel_config_reloads_total`)
relabelConfigReloadErrors = metrics.NewCounter(`vmagent_relabel_config_reloads_errors_total`)
relabelConfigSuccess = metrics.NewCounter(`vmagent_relabel_config_last_reload_successful`)
relabelConfigTimestamp = metrics.NewCounter(`vmagent_relabel_config_last_reload_success_timestamp_seconds`)
)
func reloadStreamAggrConfigs() {
if len(*remoteWriteMultitenantURLs) > 0 {
rwctxsMapLock.Lock()
for _, rwctxs := range rwctxsMap {
reinitStreamAggr(rwctxs)
}
rwctxsMapLock.Unlock()
} else {
reinitStreamAggr(rwctxsDefault)
}
}
func reinitStreamAggr(rwctxs []*remoteWriteCtx) {
for _, rwctx := range rwctxs {
rwctx.reinitStreamAggr()
}
}
func newRemoteWriteCtxs(at *auth.Token, urls []string) []*remoteWriteCtx {
if len(urls) == 0 {
logger.Panicf("BUG: urls must be non-empty")
}
maxInmemoryBlocks := memory.Allowed() / len(urls) / *maxRowsPerBlock / 100
if maxInmemoryBlocks / *queues > 100 {
// There is no much sense in keeping higher number of blocks in memory,
// since this means that the producer outperforms consumer and the queue
// will continue growing. It is better storing the queue to file.
maxInmemoryBlocks = 100 * *queues
}
if maxInmemoryBlocks < 2 {
maxInmemoryBlocks = 2
}
rwctxs := make([]*remoteWriteCtx, len(urls))
for i, remoteWriteURLRaw := range urls {
remoteWriteURL, err := url.Parse(remoteWriteURLRaw)
if err != nil {
logger.Fatalf("invalid -remoteWrite.url=%q: %s", remoteWriteURL, err)
}
sanitizedURL := fmt.Sprintf("%d:secret-url", i+1)
if at != nil {
// Construct full remote_write url for the given tenant according to https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#url-format
remoteWriteURL.Path = fmt.Sprintf("%s/insert/%d:%d/prometheus/api/v1/write", remoteWriteURL.Path, at.AccountID, at.ProjectID)
sanitizedURL = fmt.Sprintf("%s:%d:%d", sanitizedURL, at.AccountID, at.ProjectID)
}
if *showRemoteWriteURL {
sanitizedURL = fmt.Sprintf("%d:%s", i+1, remoteWriteURL)
}
rwctxs[i] = newRemoteWriteCtx(i, remoteWriteURL, maxInmemoryBlocks, sanitizedURL)
}
return rwctxs
}
var configReloaderStopCh = make(chan struct{})
var configReloaderWG sync.WaitGroup
// Stop stops remotewrite.
//
// It is expected that nobody calls Push during and after the call to this func.
func Stop() {
close(configReloaderStopCh)
configReloaderWG.Wait()
for _, rwctx := range rwctxsDefault {
rwctx.MustStop()
}
rwctxsDefault = nil
// There is no need in locking rwctxsMapLock here, since nobody should call Push during the Stop call.
for _, rwctxs := range rwctxsMap {
for _, rwctx := range rwctxs {
rwctx.MustStop()
}
}
rwctxsMap = nil
if sl := hourlySeriesLimiter; sl != nil {
sl.MustStop()
}
if sl := dailySeriesLimiter; sl != nil {
sl.MustStop()
}
}
// Push sends wr to remote storage systems set via `-remoteWrite.url`.
//
// 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) {
if at == nil && len(*remoteWriteMultitenantURLs) > 0 {
// Write data to default tenant if at isn't set while -remoteWrite.multitenantURL is set.
at = defaultAuthToken
}
var rwctxs []*remoteWriteCtx
if at == nil {
rwctxs = rwctxsDefault
} else {
if len(*remoteWriteMultitenantURLs) == 0 {
logger.Panicf("BUG: -remoteWrite.multitenantURL command-line flag must be set when __tenant_id__=%q label is set", at)
}
rwctxsMapLock.Lock()
tenantID := tenantmetrics.TenantID{
AccountID: at.AccountID,
ProjectID: at.ProjectID,
}
rwctxs = rwctxsMap[tenantID]
if rwctxs == nil {
rwctxs = newRemoteWriteCtxs(at, *remoteWriteMultitenantURLs)
rwctxsMap[tenantID] = rwctxs
}
rwctxsMapLock.Unlock()
}
var rctx *relabelCtx
rcs := allRelabelConfigs.Load()
pcsGlobal := rcs.global
if pcsGlobal.Len() > 0 {
rctx = getRelabelCtx()
}
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
labelsCount := 0
i := 0
for i < len(tss) {
samplesCount += len(tss[i].Samples)
labelsCount += len(tss[i].Labels)
i++
if samplesCount >= maxSamplesPerBlock || labelsCount >= maxLabelsPerBlock {
break
}
}
tssBlock := tss
if i < len(tss) {
tssBlock = tss[:i]
tss = tss[i:]
} else {
tss = nil
}
if rctx != nil {
rowsCountBeforeRelabel := getRowsCount(tssBlock)
tssBlock = rctx.applyRelabeling(tssBlock, pcsGlobal)
rowsCountAfterRelabel := getRowsCount(tssBlock)
rowsDroppedByGlobalRelabel.Add(rowsCountBeforeRelabel - rowsCountAfterRelabel)
}
sortLabelsIfNeeded(tssBlock)
tssBlock = limitSeriesCardinality(tssBlock)
pushBlockToRemoteStorages(rwctxs, tssBlock)
if rctx != nil {
rctx.reset()
}
}
if rctx != nil {
putRelabelCtx(rctx)
}
}
func pushBlockToRemoteStorages(rwctxs []*remoteWriteCtx, tssBlock []prompbmarshal.TimeSeries) {
if len(tssBlock) == 0 {
// Nothing to push
return
}
if len(rwctxs) == 1 {
// Fast path - just push data to the configured single remote storage
rwctxs[0].Push(tssBlock)
return
}
// We need to push tssBlock to multiple remote storages.
// This is either sharding or replication depending on -remoteWrite.shardByURL command-line flag value.
if *shardByURL {
// Shard the data among rwctxs
tssByURL := make([][]prompbmarshal.TimeSeries, len(rwctxs))
for _, ts := range tssBlock {
h := getLabelsHash(ts.Labels)
idx := h % uint64(len(tssByURL))
tssByURL[idx] = append(tssByURL[idx], ts)
}
// Push sharded data to remote storages in parallel in order to reduce
// the time needed for sending the data to multiple remote storage systems.
var wg sync.WaitGroup
wg.Add(len(rwctxs))
for i, rwctx := range rwctxs {
tssShard := tssByURL[i]
if len(tssShard) == 0 {
continue
}
go func(rwctx *remoteWriteCtx, tss []prompbmarshal.TimeSeries) {
defer wg.Done()
rwctx.Push(tss)
}(rwctx, tssShard)
}
wg.Wait()
return
}
// Replicate data among rwctxs.
// Push block to remote storages in parallel in order to reduce
// the time needed for sending the data to multiple remote storage systems.
var wg sync.WaitGroup
wg.Add(len(rwctxs))
for _, rwctx := range rwctxs {
go func(rwctx *remoteWriteCtx) {
defer wg.Done()
rwctx.Push(tssBlock)
}(rwctx)
}
wg.Wait()
}
// sortLabelsIfNeeded sorts labels if -sortLabels command-line flag is set.
func sortLabelsIfNeeded(tss []prompbmarshal.TimeSeries) {
if !*sortLabels {
return
}
for i := range tss {
promrelabel.SortLabels(tss[i].Labels)
}
}
func limitSeriesCardinality(tss []prompbmarshal.TimeSeries) []prompbmarshal.TimeSeries {
if hourlySeriesLimiter == nil && dailySeriesLimiter == nil {
return tss
}
dst := make([]prompbmarshal.TimeSeries, 0, len(tss))
for i := range tss {
labels := tss[i].Labels
h := getLabelsHash(labels)
if hourlySeriesLimiter != nil && !hourlySeriesLimiter.Add(h) {
hourlySeriesLimitRowsDropped.Add(len(tss[i].Samples))
logSkippedSeries(labels, "-remoteWrite.maxHourlySeries", hourlySeriesLimiter.MaxItems())
continue
}
if dailySeriesLimiter != nil && !dailySeriesLimiter.Add(h) {
dailySeriesLimitRowsDropped.Add(len(tss[i].Samples))
logSkippedSeries(labels, "-remoteWrite.maxDailySeries", dailySeriesLimiter.MaxItems())
continue
}
dst = append(dst, tss[i])
}
return dst
}
var (
hourlySeriesLimiter *bloomfilter.Limiter
dailySeriesLimiter *bloomfilter.Limiter
hourlySeriesLimitRowsDropped = metrics.NewCounter(`vmagent_hourly_series_limit_rows_dropped_total`)
dailySeriesLimitRowsDropped = metrics.NewCounter(`vmagent_daily_series_limit_rows_dropped_total`)
)
func getLabelsHash(labels []prompbmarshal.Label) uint64 {
bb := labelsHashBufPool.Get()
b := bb.B[:0]
for _, label := range labels {
b = append(b, label.Name...)
b = append(b, label.Value...)
}
h := xxhash.Sum64(b)
bb.B = b
labelsHashBufPool.Put(bb)
return h
}
var labelsHashBufPool bytesutil.ByteBufferPool
func logSkippedSeries(labels []prompbmarshal.Label, flagName string, flagValue int) {
select {
case <-logSkippedSeriesTicker.C:
// Do not use logger.WithThrottler() here, since this will increase CPU usage
// because every call to logSkippedSeries will result to a call to labelsToString.
logger.Warnf("skip series %s because %s=%d reached", labelsToString(labels), flagName, flagValue)
default:
}
}
var logSkippedSeriesTicker = time.NewTicker(5 * time.Second)
func labelsToString(labels []prompbmarshal.Label) string {
var b []byte
b = append(b, '{')
for i, label := range labels {
b = append(b, label.Name...)
b = append(b, '=')
b = strconv.AppendQuote(b, label.Value)
if i+1 < len(labels) {
b = append(b, ',')
}
}
b = append(b, '}')
return string(b)
}
var (
globalRowsPushedBeforeRelabel = metrics.NewCounter("vmagent_remotewrite_global_rows_pushed_before_relabel_total")
rowsDroppedByGlobalRelabel = metrics.NewCounter("vmagent_remotewrite_global_relabel_metrics_dropped_total")
)
type remoteWriteCtx struct {
idx int
fq *persistentqueue.FastQueue
c *client
sas atomic.Pointer[streamaggr.Aggregators]
streamAggrKeepInput bool
streamAggrDropInput bool
pss []*pendingSeries
pssNextIdx uint64
rowsPushedAfterRelabel *metrics.Counter
rowsDroppedByRelabel *metrics.Counter
}
func newRemoteWriteCtx(argIdx int, remoteWriteURL *url.URL, maxInmemoryBlocks int, sanitizedURL string) *remoteWriteCtx {
// strip query params, otherwise changing params resets pq
pqURL := *remoteWriteURL
pqURL.RawQuery = ""
pqURL.Fragment = ""
h := xxhash.Sum64([]byte(pqURL.String()))
queuePath := filepath.Join(*tmpDataPath, persistentQueueDirname, fmt.Sprintf("%d_%016X", argIdx+1, h))
maxPendingBytes := maxPendingBytesPerURL.GetOptionalArg(argIdx)
if maxPendingBytes != 0 && maxPendingBytes < persistentqueue.DefaultChunkFileSize {
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4195
logger.Warnf("rounding the -remoteWrite.maxDiskUsagePerURL=%d to the minimum supported value: %d", maxPendingBytes, persistentqueue.DefaultChunkFileSize)
maxPendingBytes = persistentqueue.DefaultChunkFileSize
}
fq := persistentqueue.MustOpenFastQueue(queuePath, sanitizedURL, maxInmemoryBlocks, maxPendingBytes)
_ = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_pending_data_bytes{path=%q, url=%q}`, queuePath, sanitizedURL), func() float64 {
return float64(fq.GetPendingBytes())
})
_ = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_pending_inmemory_blocks{path=%q, url=%q}`, queuePath, sanitizedURL), func() float64 {
return float64(fq.GetInmemoryQueueLen())
})
var c *client
switch remoteWriteURL.Scheme {
case "http", "https":
c = newHTTPClient(argIdx, remoteWriteURL.String(), sanitizedURL, fq, *queues)
default:
logger.Fatalf("unsupported scheme: %s for remoteWriteURL: %s, want `http`, `https`", remoteWriteURL.Scheme, sanitizedURL)
}
c.init(argIdx, *queues, sanitizedURL)
// Initialize pss
sf := significantFigures.GetOptionalArg(argIdx)
rd := roundDigits.GetOptionalArg(argIdx)
pssLen := *queues
if n := cgroup.AvailableCPUs(); pssLen > n {
// There is no sense in running more than availableCPUs concurrent pendingSeries,
// since every pendingSeries can saturate up to a single CPU.
pssLen = n
}
pss := make([]*pendingSeries, pssLen)
for i := range pss {
pss[i] = newPendingSeries(fq.MustWriteBlock, c.useVMProto, sf, rd)
}
rwctx := &remoteWriteCtx{
idx: argIdx,
fq: fq,
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)),
}
// Initialize sas
sasFile := streamAggrConfig.GetOptionalArg(argIdx)
if sasFile != "" {
dedupInterval := streamAggrDedupInterval.GetOptionalArg(argIdx)
sas, err := streamaggr.LoadFromFile(sasFile, rwctx.pushInternal, dedupInterval)
if err != nil {
logger.Fatalf("cannot initialize stream aggregators from -remoteWrite.streamAggr.config=%q: %s", sasFile, err)
}
rwctx.sas.Store(sas)
rwctx.streamAggrKeepInput = streamAggrKeepInput.GetOptionalArg(argIdx)
rwctx.streamAggrDropInput = streamAggrDropInput.GetOptionalArg(argIdx)
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_successful{path=%q}`, sasFile)).Set(1)
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_success_timestamp_seconds{path=%q}`, sasFile)).Set(fasttime.UnixTimestamp())
}
return rwctx
}
func (rwctx *remoteWriteCtx) MustStop() {
// sas must be stopped before rwctx is closed
// because sas can write pending series to rwctx.pss if there are any
sas := rwctx.sas.Swap(nil)
sas.MustStop()
for _, ps := range rwctx.pss {
ps.MustStop()
}
rwctx.idx = 0
rwctx.pss = nil
rwctx.fq.UnblockAllReaders()
rwctx.c.MustStop()
rwctx.c = nil
rwctx.fq.MustClose()
rwctx.fq = nil
rwctx.rowsPushedAfterRelabel = nil
rwctx.rowsDroppedByRelabel = nil
}
func (rwctx *remoteWriteCtx) Push(tss []prompbmarshal.TimeSeries) {
// Apply relabeling
var rctx *relabelCtx
var v *[]prompbmarshal.TimeSeries
rcs := allRelabelConfigs.Load()
pcs := rcs.perURL[rwctx.idx]
if pcs.Len() > 0 {
rctx = getRelabelCtx()
// Make a copy of tss before applying relabeling in order to prevent
// from affecting time series for other remoteWrite.url configs.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/467
// and https://github.com/VictoriaMetrics/VictoriaMetrics/issues/599
v = tssPool.Get().(*[]prompbmarshal.TimeSeries)
tss = append(*v, tss...)
rowsCountBeforeRelabel := getRowsCount(tss)
tss = rctx.applyRelabeling(tss, pcs)
rowsCountAfterRelabel := getRowsCount(tss)
rwctx.rowsDroppedByRelabel.Add(rowsCountBeforeRelabel - rowsCountAfterRelabel)
}
rowsCount := getRowsCount(tss)
rwctx.rowsPushedAfterRelabel.Add(rowsCount)
// Apply stream aggregation if any
sas := rwctx.sas.Load()
if sas != nil {
matchIdxs := matchIdxsPool.Get()
matchIdxs.B = sas.Push(tss, matchIdxs.B)
if !rwctx.streamAggrKeepInput {
if rctx == nil {
rctx = getRelabelCtx()
// Make a copy of tss before dropping aggregated series
v = tssPool.Get().(*[]prompbmarshal.TimeSeries)
tss = append(*v, tss...)
}
tss = dropAggregatedSeries(tss, matchIdxs.B, rwctx.streamAggrDropInput)
}
matchIdxsPool.Put(matchIdxs)
}
rwctx.pushInternal(tss)
// Return back relabeling contexts to the pool
if rctx != nil {
*v = prompbmarshal.ResetTimeSeries(tss)
tssPool.Put(v)
putRelabelCtx(rctx)
}
}
var matchIdxsPool bytesutil.ByteBufferPool
func dropAggregatedSeries(src []prompbmarshal.TimeSeries, matchIdxs []byte, dropInput bool) []prompbmarshal.TimeSeries {
dst := src[:0]
if !dropInput {
for i, match := range matchIdxs {
if match == 1 {
continue
}
dst = append(dst, src[i])
}
}
tail := src[len(dst):]
_ = prompbmarshal.ResetTimeSeries(tail)
return dst
}
func (rwctx *remoteWriteCtx) pushInternal(tss []prompbmarshal.TimeSeries) {
var rctx *relabelCtx
var v *[]prompbmarshal.TimeSeries
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.
rctx = getRelabelCtx()
v = tssPool.Get().(*[]prompbmarshal.TimeSeries)
tss = append(*v, tss...)
rctx.appendExtraLabels(tss, labelsGlobal)
}
pss := rwctx.pss
idx := atomic.AddUint64(&rwctx.pssNextIdx, 1) % uint64(len(pss))
pss[idx].Push(tss)
if rctx != nil {
*v = prompbmarshal.ResetTimeSeries(tss)
tssPool.Put(v)
putRelabelCtx(rctx)
}
}
func (rwctx *remoteWriteCtx) reinitStreamAggr() {
sasFile := streamAggrConfig.GetOptionalArg(rwctx.idx)
if sasFile == "" {
// There is no stream aggregation for rwctx
return
}
logger.Infof("reloading stream aggregation configs pointed by -remoteWrite.streamAggr.config=%q", sasFile)
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reloads_total{path=%q}`, sasFile)).Inc()
dedupInterval := streamAggrDedupInterval.GetOptionalArg(rwctx.idx)
sasNew, err := streamaggr.LoadFromFile(sasFile, rwctx.pushInternal, dedupInterval)
if err != nil {
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reloads_errors_total{path=%q}`, sasFile)).Inc()
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_successful{path=%q}`, sasFile)).Set(0)
logger.Errorf("cannot reload stream aggregation config from -remoteWrite.streamAggr.config=%q; continue using the previously loaded config; error: %s", sasFile, err)
return
}
sas := rwctx.sas.Load()
if !sasNew.Equal(sas) {
sasOld := rwctx.sas.Swap(sasNew)
sasOld.MustStop()
logger.Infof("successfully reloaded stream aggregation configs at -remoteWrite.streamAggr.config=%q", sasFile)
} else {
sasNew.MustStop()
logger.Infof("the config at -remoteWrite.streamAggr.config=%q wasn't changed", sasFile)
}
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_successful{path=%q}`, sasFile)).Set(1)
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_success_timestamp_seconds{path=%q}`, sasFile)).Set(fasttime.UnixTimestamp())
}
var tssPool = &sync.Pool{
New: func() interface{} {
a := []prompbmarshal.TimeSeries{}
return &a
},
}
func getRowsCount(tss []prompbmarshal.TimeSeries) int {
rowsCount := 0
for _, ts := range tss {
rowsCount += len(ts.Samples)
}
return rowsCount
}
// CheckStreamAggrConfigs checks configs pointed by -remoteWrite.streamAggr.config
func CheckStreamAggrConfigs() error {
pushNoop := func(tss []prompbmarshal.TimeSeries) {}
for idx, sasFile := range *streamAggrConfig {
if sasFile == "" {
continue
}
dedupInterval := streamAggrDedupInterval.GetOptionalArg(idx)
sas, err := streamaggr.LoadFromFile(sasFile, pushNoop, dedupInterval)
if err != nil {
return fmt.Errorf("cannot load -remoteWrite.streamAggr.config=%q: %w", sasFile, err)
}
sas.MustStop()
}
return nil
}