docs/CHANGELOG.md: cut v1.87.13

Previously the was a race condition when the background goroutine still could try collecting metrics
from already stopped resources after returning from pushmetrics.Stop().
Now the pushmetrics.Stop() waits until the background goroutine is stopped before returning.

This is a follow-up for https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5549
and the commit fe2d9f6646 .

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5548

.github/workflows/check-licenses.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@main
         with:
-          go-version: 1.20.0
+          go-version: stable
         id: go
       - name: Code checkout
         uses: actions/checkout@master

.github/workflows/codeql-analysis.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20.0
+          go-version: stable
           check-latest: true
           cache: true
         if: ${{ matrix.language == 'go' }}

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20.0
+          go-version: stable
           check-latest: true
           cache: true
 
@@ -56,7 +56,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20.0
+          go-version: stable
           check-latest: true
           cache: true
 
@@ -81,7 +81,7 @@ jobs:
         id: go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.20.0
+          go-version: stable
           check-latest: true
           cache: true
 

.github/workflows/nightly-build.yml

@@ -1,48 +0,0 @@
-name: nightly-build
-on:
-  schedule:
-    # Daily at 2:48am
-    - cron: '48 2 * * *'
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-      - name: Login to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Setup Go
-        uses: actions/setup-go@main
-        with:
-          go-version: 1.20.0
-        id: go
-
-      - name: Setup docker scan
-        run: |
-          mkdir -p ~/.docker/cli-plugins && \
-          curl https://github.com/docker/scan-cli-plugin/releases/latest/download/docker-scan_linux_amd64 -L -s -S -o ~/.docker/cli-plugins/docker-scan &&\
-          chmod +x ~/.docker/cli-plugins/docker-scan
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      
-      - name: Code checkout
-        uses: actions/checkout@master
-
-      - uses: actions/cache@v3
-        with:
-          path: gocache-for-docker
-          key: gocache-docker-${{ runner.os }}-${{ steps.go.outputs.go-version }}-${{ hashFiles('go.mod') }}
-
-      - name: build & publish
-        run: |
-          docker scan --severity=medium --login --token "$SNYK_TOKEN" --accept-license
-          LATEST_TAG=nightly PKG_TAG=nightly make publish
-        env: 
-          SNYK_TOKEN: ${{ secrets.SNYK_AUTH_TOKEN }}

Makefile

@@ -31,7 +31,7 @@ all: \
 clean:
 	rm -rf bin/*
 
-publish: docker-scan \
+publish: package-base \
 	publish-victoria-metrics \
 	publish-vmagent \
 	publish-vmalert \
@@ -148,7 +148,6 @@ victoria-metrics-crossbuild: \
 	victoria-metrics-linux-amd64 \
 	victoria-metrics-linux-arm64 \
 	victoria-metrics-linux-arm \
-	victoria-metrics-linux-386 \
 	victoria-metrics-linux-ppc64le \
 	victoria-metrics-darwin-amd64 \
 	victoria-metrics-darwin-arm64 \
@@ -160,7 +159,6 @@ vmutils-crossbuild: \
 	vmutils-linux-amd64 \
 	vmutils-linux-arm64 \
 	vmutils-linux-arm \
-	vmutils-linux-386 \
 	vmutils-linux-ppc64le \
 	vmutils-darwin-amd64 \
 	vmutils-darwin-arm64 \
@@ -169,6 +167,7 @@ vmutils-crossbuild: \
 	vmutils-windows-amd64
 
 publish-release:
+	rm -rf bin/*
 	git checkout $(TAG) && LATEST_TAG=stable $(MAKE) release publish && \
 		git checkout $(TAG)-cluster && LATEST_TAG=cluster-stable $(MAKE) release publish && \
 		git checkout $(TAG)-enterprise && LATEST_TAG=enterprise-stable $(MAKE) release publish && \
@@ -354,7 +353,7 @@ benchmark-pure:
 vendor-update:
 	go get -u -d ./lib/...
 	go get -u -d ./app/...
-	go mod tidy -compat=1.19
+	go mod tidy -compat=1.20
 	go mod vendor
 
 app-local:
@@ -380,7 +379,7 @@ golangci-lint: install-golangci-lint
 	golangci-lint run
 
 install-golangci-lint:
-	which golangci-lint || curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.51.1
+	which golangci-lint || curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.55.1
 
 govulncheck: install-govulncheck
 	govulncheck ./...

README.md

@@ -2130,7 +2130,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
 
 ```
   -bigMergeConcurrency int
-     The maximum number of CPU cores to use for big merges. Default value is used if set to 0
+     Deprecated: this flag does nothing. Please use -smallMergeConcurrency for controlling the concurrency of background merges. See https://docs.victoriametrics.com/#storage
   -cacheExpireDuration duration
      Items are removed from in-memory caches after they aren't accessed for this duration. Lower values may reduce memory usage at the cost of higher CPU usage. See also -prevCacheRemovalPercent (default 30m0s)
   -configAuthKey string
@@ -2469,7 +2469,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
   -selfScrapeJob string
      Value for 'job' label, which is added to self-scraped metrics (default "victoria-metrics")
   -smallMergeConcurrency int
-     The maximum number of CPU cores to use for small merges. Default value is used if set to 0
+     The maximum number of workers for background merges. See https://docs.victoriametrics.com/#storage . It isn't recommended tuning this flag in general case, since this may lead to uncontrolled increase in the number of parts and increased CPU usage during queries
   -snapshotAuthKey string
      authKey, which must be passed in query string to /snapshot* pages
   -snapshotsMaxAge value

app/victoria-metrics/main.go

@@ -26,7 +26,8 @@ import (
 var (
 	httpListenAddr   = flag.String("httpListenAddr", ":8428", "TCP address to listen for http connections. See also -httpListenAddr.useProxyProtocol")
 	useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
-		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt")
+		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt . "+
+		"With enabled proxy protocol http server cannot serve regular /metrics endpoint. Use -pushmetrics.url for metrics pushing")
 	minScrapeInterval = flag.Duration("dedup.minScrapeInterval", 0, "Leave only the last sample in every time series per each discrete interval "+
 		"equal to -dedup.minScrapeInterval > 0. See https://docs.victoriametrics.com/#deduplication and https://docs.victoriametrics.com/#downsampling")
 	dryRun = flag.Bool("dryRun", false, "Whether to check only -promscrape.config and then exit. "+
@@ -44,7 +45,6 @@ func main() {
 	envflag.Parse()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
 
 	if promscrape.IsDryRun() {
 		*dryRun = true
@@ -64,13 +64,16 @@ func main() {
 	vmstorage.Init(promql.ResetRollupResultCacheIfNeeded)
 	vmselect.Init()
 	vminsert.Init()
+
 	startSelfScraper()
 
 	go httpserver.Serve(*httpListenAddr, *useProxyProtocol, requestHandler)
 	logger.Infof("started VictoriaMetrics in %.3f seconds", time.Since(startTime).Seconds())
 
+	pushmetrics.Init()
 	sig := procutil.WaitForSigterm()
 	logger.Infof("received signal %s", sig)
+	pushmetrics.Stop()
 
 	stopSelfScraper()
 
@@ -79,8 +82,8 @@ func main() {
 	if err := httpserver.Stop(*httpListenAddr); err != nil {
 		logger.Fatalf("cannot stop the webservice: %s", err)
 	}
-	vminsert.Stop()
 	logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
+	vminsert.Stop()
 
 	vmstorage.Stop()
 	vmselect.Stop()

app/vmagent/main.go

@@ -11,6 +11,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/VictoriaMetrics/metrics"
+
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/csvimport"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/datadog"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmagent/graphite"
@@ -38,7 +40,6 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/pushmetrics"
-	"github.com/VictoriaMetrics/metrics"
 )
 
 var (
@@ -46,7 +47,8 @@ var (
 		"Set this flag to empty value in order to disable listening on any port. This mode may be useful for running multiple vmagent instances on the same server. "+
 		"Note that /targets and /metrics pages aren't available if -httpListenAddr=''. See also -httpListenAddr.useProxyProtocol")
 	useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
-		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt")
+		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt . "+
+		"With enabled proxy protocol http server cannot serve regular /metrics endpoint. Use -pushmetrics.url for metrics pushing")
 	influxListenAddr = flag.String("influxListenAddr", "", "TCP and UDP address to listen for InfluxDB line protocol data. Usually :8089 must be set. Doesn't work if empty. "+
 		"This flag isn't needed when ingesting data over HTTP - just send it to http://<vmagent>:8429/write . "+
 		"See also -influxListenAddr.useProxyProtocol")
@@ -92,7 +94,6 @@ func main() {
 	remotewrite.InitSecretFlags()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
 
 	if promscrape.IsDryRun() {
 		if err := promscrape.CheckConfig(); err != nil {
@@ -140,8 +141,10 @@ func main() {
 	}
 	logger.Infof("started vmagent in %.3f seconds", time.Since(startTime).Seconds())
 
+	pushmetrics.Init()
 	sig := procutil.WaitForSigterm()
 	logger.Infof("received signal %s", sig)
+	pushmetrics.Stop()
 
 	startTime = time.Now()
 	if len(*httpListenAddr) > 0 {
@@ -203,7 +206,7 @@ func getAuthTokenFromPath(path string) (*auth.Token, error) {
 	if p.Suffix != "opentsdb/api/put" {
 		return nil, fmt.Errorf("unsupported path requested: %q; expecting 'opentsdb/api/put'", p.Suffix)
 	}
-	return auth.NewToken(p.AuthToken)
+	return auth.NewTokenPossibleMultitenant(p.AuthToken)
 }
 
 func requestHandler(w http.ResponseWriter, r *http.Request) bool {
@@ -246,7 +249,7 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
 		w.WriteHeader(statusCode)
 		return true
 	}
-	if strings.HasPrefix(path, "datadog/") {
+	if strings.HasPrefix(path, "/datadog/") {
 		// Trim suffix from paths starting from /datadog/ in order to support legacy DataDog agent.
 		// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/2670
 		path = strings.TrimSuffix(path, "/")

app/vmagent/remotewrite/relabel.go

@@ -114,9 +114,9 @@ func (rctx *relabelCtx) applyRelabeling(tss []prompbmarshal.TimeSeries, extraLab
 			for j := range tmpLabels {
 				label := &tmpLabels[j]
 				if label.Name == "__name__" {
-					label.Value = promrelabel.SanitizeName(label.Value)
+					label.Value = promrelabel.SanitizeMetricName(label.Value)
 				} else {
-					label.Name = promrelabel.SanitizeName(label.Name)
+					label.Name = promrelabel.SanitizeLabelName(label.Name)
 				}
 			}
 		}

app/vmagent/remotewrite/remotewrite.go

@@ -524,6 +524,11 @@ func newRemoteWriteCtx(argIdx int, at *auth.Token, remoteWriteURL *url.URL, maxI
 }
 
 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
+	rwctx.sas.MustStop()
+	rwctx.sas = nil
+
 	for _, ps := range rwctx.pss {
 		ps.MustStop()
 	}
@@ -532,8 +537,7 @@ func (rwctx *remoteWriteCtx) MustStop() {
 	rwctx.fq.UnblockAllReaders()
 	rwctx.c.MustStop()
 	rwctx.c = nil
-	rwctx.sas.MustStop()
-	rwctx.sas = nil
+
 	rwctx.fq.MustClose()
 	rwctx.fq = nil
 

app/vmalert/Makefile

@@ -73,6 +73,7 @@ test-vmalert:
 	go test -v -race -cover ./app/vmalert/notifier
 	go test -v -race -cover ./app/vmalert/config
 	go test -v -race -cover ./app/vmalert/remotewrite
+	go test -v -race -cover ./app/vmalert/utils
 
 run-vmalert: vmalert
 	./bin/vmalert -rule=app/vmalert/config/testdata/rules/rules2-good.rules \

app/vmalert/datasource/vm.go

@@ -28,6 +28,7 @@ func toDatasourceType(s string) datasourceType {
 }
 
 // VMStorage represents vmstorage entity with ability to read and write metrics
+// WARN: when adding a new field, remember to update Clone() method.
 type VMStorage struct {
 	c                *http.Client
 	authCfg          *promauth.Config
@@ -53,29 +54,61 @@ type keyValue struct {
 
 // Clone makes clone of VMStorage, shares http client.
 func (s *VMStorage) Clone() *VMStorage {
-	return &VMStorage{
+	ns := &VMStorage{
 		c:                s.c,
 		authCfg:          s.authCfg,
 		datasourceURL:    s.datasourceURL,
+		appendTypePrefix: s.appendTypePrefix,
 		lookBack:         s.lookBack,
 		queryStep:        s.queryStep,
-		appendTypePrefix: s.appendTypePrefix,
-		dataSourceType:   s.dataSourceType,
+
+		dataSourceType:     s.dataSourceType,
+		evaluationInterval: s.evaluationInterval,
+
+		// init map so it can be populated below
+		extraParams: url.Values{},
+
+		debug: s.debug,
 	}
+	if len(s.extraHeaders) > 0 {
+		ns.extraHeaders = make([]keyValue, len(s.extraHeaders))
+		copy(ns.extraHeaders, s.extraHeaders)
+	}
+	for k, v := range s.extraParams {
+		ns.extraParams[k] = v
+	}
+
+	return ns
 }
 
 // ApplyParams - changes given querier params.
 func (s *VMStorage) ApplyParams(params QuerierParams) *VMStorage {
 	s.dataSourceType = toDatasourceType(params.DataSourceType)
 	s.evaluationInterval = params.EvaluationInterval
-	s.extraParams = params.QueryParams
-	s.debug = params.Debug
+	if params.QueryParams != nil {
+		if s.extraParams == nil {
+			s.extraParams = url.Values{}
+		}
+		for k, vl := range params.QueryParams {
+			// custom query params are prior to default ones
+			if s.extraParams.Has(k) {
+				s.extraParams.Del(k)
+			}
+			for _, v := range vl {
+				// don't use .Set() instead of Del/Add since it is allowed
+				// for GET params to be duplicated
+				// see https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4908
+				s.extraParams.Add(k, v)
+			}
+		}
+	}
 	if params.Headers != nil {
 		for key, value := range params.Headers {
 			kv := keyValue{key: key, value: value}
 			s.extraHeaders = append(s.extraHeaders, kv)
 		}
 	}
+	s.debug = params.Debug
 	return s
 }
 
@@ -94,6 +127,7 @@ func NewVMStorage(baseURL string, authCfg *promauth.Config, lookBack time.Durati
 		lookBack:         lookBack,
 		queryStep:        queryStep,
 		dataSourceType:   datasourcePrometheus,
+		extraParams:      url.Values{},
 	}
 }
 

app/vmalert/datasource/vm_test.go

@@ -279,6 +279,9 @@ func TestRequestParams(t *testing.T) {
 	}
 	query := "up"
 	timestamp := time.Date(2001, 2, 3, 4, 5, 6, 0, time.UTC)
+	storage := VMStorage{
+		extraParams: url.Values{"round_digits": {"10"}},
+	}
 	testCases := []struct {
 		name       string
 		queryRange bool
@@ -475,6 +478,28 @@ func TestRequestParams(t *testing.T) {
 				checkEqualString(t, exp, r.URL.RawQuery)
 			},
 		},
+		{
+			"custom params overrides the original params",
+			false,
+			storage.Clone().ApplyParams(QuerierParams{
+				QueryParams: url.Values{"round_digits": {"2"}},
+			}),
+			func(t *testing.T, r *http.Request) {
+				exp := fmt.Sprintf("query=%s&round_digits=2&time=%d", query, timestamp.Unix())
+				checkEqualString(t, exp, r.URL.RawQuery)
+			},
+		},
+		{
+			"allow duplicates in query params",
+			false,
+			storage.Clone().ApplyParams(QuerierParams{
+				QueryParams: url.Values{"extra_labels": {"env=dev", "foo=bar"}},
+			}),
+			func(t *testing.T, r *http.Request) {
+				exp := url.Values{"query": {query}, "round_digits": {"10"}, "extra_labels": {"env=dev", "foo=bar"}, "time": {fmt.Sprintf("%d", timestamp.Unix())}}
+				checkEqualString(t, exp.Encode(), r.URL.RawQuery)
+			},
+		},
 		{
 			"graphite extra params",
 			false,

app/vmalert/group.go

@@ -323,11 +323,17 @@ func (g *Group) start(ctx context.Context, nts func() []notifier.Notifier, rw *r
 				g.Interval = ng.Interval
 				t.Stop()
 				t = time.NewTicker(g.Interval)
+				evalTS = time.Now()
 			}
 			g.mu.Unlock()
 			logger.Infof("group %q re-started; interval=%v; concurrency=%d", g.Name, g.Interval, g.Concurrency)
 		case <-t.C:
 			missed := (time.Since(evalTS) / g.Interval) - 1
+			if missed < 0 {
+				// missed can become < 0 due to irregular delays during evaluation
+				// which can result in time.Since(evalTS) < g.Interval
+				missed = 0
+			}
 			if missed > 0 {
 				g.metrics.iterationMissed.Inc()
 			}

app/vmalert/main.go

@@ -51,7 +51,8 @@ absolute path to all .tpl files in root.`)
 
 	httpListenAddr   = flag.String("httpListenAddr", ":8880", "Address to listen for http connections. See also -httpListenAddr.useProxyProtocol")
 	useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
-		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt")
+		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt . "+
+		"With enabled proxy protocol http server cannot serve regular /metrics endpoint. Use -pushmetrics.url for metrics pushing")
 	evaluationInterval = flag.Duration("evaluationInterval", time.Minute, "How often to evaluate the rules")
 
 	validateTemplates   = flag.Bool("rule.validateTemplates", true, "Whether to validate annotation and label templates")
@@ -92,7 +93,6 @@ func main() {
 	datasource.InitSecretFlags()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
 
 	if !*remoteReadIgnoreRestoreErrors {
 		logger.Warnf("flag `remoteRead.ignoreRestoreErrors` is deprecated and will be removed in next releases.")
@@ -178,8 +178,11 @@ func main() {
 	rh := &requestHandler{m: manager}
 	go httpserver.Serve(*httpListenAddr, *useProxyProtocol, rh.handler)
 
+	pushmetrics.Init()
 	sig := procutil.WaitForSigterm()
 	logger.Infof("service received signal %s", sig)
+	pushmetrics.Stop()
+
 	if err := httpserver.Stop(*httpListenAddr); err != nil {
 		logger.Fatalf("cannot stop the webservice: %s", err)
 	}

app/vmalert/manager.go

@@ -205,6 +205,7 @@ func (g *Group) toAPI() APIGroup {
 		Headers:        headersToStrings(g.Headers),
 		Labels:         g.Labels,
 	}
+	ag.Rules = make([]APIRule, 0)
 	for _, r := range g.Rules {
 		ag.Rules = append(ag.Rules, r.ToAPI())
 	}

app/vmalert/notifier/alert.go

@@ -191,7 +191,7 @@ func (a Alert) toPromLabels(relabelCfg *promrelabel.ParsedConfigs) []prompbmarsh
 	var labels []prompbmarshal.Label
 	for k, v := range a.Labels {
 		labels = append(labels, prompbmarshal.Label{
-			Name:  k,
+			Name:  promrelabel.SanitizeMetricName(k),
 			Value: v,
 		})
 	}

app/vmalert/notifier/alert_test.go

@@ -234,6 +234,11 @@ func TestAlert_toPromLabels(t *testing.T) {
 		[]prompbmarshal.Label{{Name: "a", Value: "baz"}, {Name: "foo", Value: "bar"}},
 		nil,
 	)
+	fn(
+		map[string]string{"foo.bar": "baz", "service!name": "qux"},
+		[]prompbmarshal.Label{{Name: "foo_bar", Value: "baz"}, {Name: "service_name", Value: "qux"}},
+		nil,
+	)
 
 	pcs, err := promrelabel.ParseRelabelConfigsData([]byte(`
 - target_label: "foo"

app/vmalert/tpl/header.qtpl

@@ -1,5 +1,4 @@
 {% import (
-    "strings"
     "net/http"
     "path"
     "net/url"
@@ -85,10 +84,7 @@ type NavItem struct {
 
 {% func printNavItems(r *http.Request, current string, items []NavItem) %}
 {%code
-    prefix := "/vmalert/"
-    if strings.HasPrefix(r.URL.Path, prefix) {
-        prefix = ""
-    }
+    prefix := utils.Prefix(r.URL.Path)
 %}
 <nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
   <div class="container-fluid">

app/vmalert/tpl/header.qtpl.go

@@ -9,52 +9,51 @@ import (
 	"net/http"
 	"net/url"
 	"path"
-	"strings"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/utils"
 )
 
-//line app/vmalert/tpl/header.qtpl:10
+//line app/vmalert/tpl/header.qtpl:9
 import (
 	qtio422016 "io"
 
 	qt422016 "github.com/valyala/quicktemplate"
 )
 
-//line app/vmalert/tpl/header.qtpl:10
+//line app/vmalert/tpl/header.qtpl:9
 var (
 	_ = qtio422016.Copy
 	_ = qt422016.AcquireByteBuffer
 )
 
-//line app/vmalert/tpl/header.qtpl:10
+//line app/vmalert/tpl/header.qtpl:9
 func StreamHeader(qw422016 *qt422016.Writer, r *http.Request, navItems []NavItem, title string) {
-//line app/vmalert/tpl/header.qtpl:10
+//line app/vmalert/tpl/header.qtpl:9
 	qw422016.N().S(`
     `)
-//line app/vmalert/tpl/header.qtpl:11
+//line app/vmalert/tpl/header.qtpl:10
 	prefix := utils.Prefix(r.URL.Path)
 
-//line app/vmalert/tpl/header.qtpl:11
+//line app/vmalert/tpl/header.qtpl:10
 	qw422016.N().S(`
 <!DOCTYPE html>
 <html lang="en">
 <head>
     <title>vmalert`)
-//line app/vmalert/tpl/header.qtpl:15
+//line app/vmalert/tpl/header.qtpl:14
 	if title != "" {
-//line app/vmalert/tpl/header.qtpl:15
+//line app/vmalert/tpl/header.qtpl:14
 		qw422016.N().S(` - `)
-//line app/vmalert/tpl/header.qtpl:15
+//line app/vmalert/tpl/header.qtpl:14
 		qw422016.E().S(title)
-//line app/vmalert/tpl/header.qtpl:15
+//line app/vmalert/tpl/header.qtpl:14
 	}
-//line app/vmalert/tpl/header.qtpl:15
+//line app/vmalert/tpl/header.qtpl:14
 	qw422016.N().S(`</title>
     <link href="`)
-//line app/vmalert/tpl/header.qtpl:16
+//line app/vmalert/tpl/header.qtpl:15
 	qw422016.E().S(prefix)
-//line app/vmalert/tpl/header.qtpl:16
+//line app/vmalert/tpl/header.qtpl:15
 	qw422016.N().S(`static/css/bootstrap.min.css" rel="stylesheet" />
     <style>
         body{
@@ -114,139 +113,136 @@ func StreamHeader(qw422016 *qt422016.Writer, r *http.Request, navItems []NavItem
 </head>
 <body>
     `)
-//line app/vmalert/tpl/header.qtpl:74
+//line app/vmalert/tpl/header.qtpl:73
 	streamprintNavItems(qw422016, r, title, navItems)
-//line app/vmalert/tpl/header.qtpl:74
+//line app/vmalert/tpl/header.qtpl:73
 	qw422016.N().S(`
     <main class="px-2">
 `)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 }
 
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 func WriteHeader(qq422016 qtio422016.Writer, r *http.Request, navItems []NavItem, title string) {
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	StreamHeader(qw422016, r, navItems, title)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	qt422016.ReleaseWriter(qw422016)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 }
 
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 func Header(r *http.Request, navItems []NavItem, title string) string {
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	qb422016 := qt422016.AcquireByteBuffer()
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	WriteHeader(qb422016, r, navItems, title)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	qs422016 := string(qb422016.B)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	qt422016.ReleaseByteBuffer(qb422016)
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 	return qs422016
-//line app/vmalert/tpl/header.qtpl:76
+//line app/vmalert/tpl/header.qtpl:75
 }
 
-//line app/vmalert/tpl/header.qtpl:80
+//line app/vmalert/tpl/header.qtpl:79
 type NavItem struct {
 	Name string
 	Url  string
 }
 
-//line app/vmalert/tpl/header.qtpl:86
+//line app/vmalert/tpl/header.qtpl:85
 func streamprintNavItems(qw422016 *qt422016.Writer, r *http.Request, current string, items []NavItem) {
-//line app/vmalert/tpl/header.qtpl:86
+//line app/vmalert/tpl/header.qtpl:85
 	qw422016.N().S(`
 `)
-//line app/vmalert/tpl/header.qtpl:88
-	prefix := "/vmalert/"
-	if strings.HasPrefix(r.URL.Path, prefix) {
-		prefix = ""
-	}
+//line app/vmalert/tpl/header.qtpl:87
+	prefix := utils.Prefix(r.URL.Path)
 
-//line app/vmalert/tpl/header.qtpl:92
+//line app/vmalert/tpl/header.qtpl:88
 	qw422016.N().S(`
 <nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
   <div class="container-fluid">
     <div class="collapse navbar-collapse" id="navbarCollapse">
         <ul class="navbar-nav me-auto mb-2 mb-md-0">
             `)
-//line app/vmalert/tpl/header.qtpl:97
+//line app/vmalert/tpl/header.qtpl:93
 	for _, item := range items {
-//line app/vmalert/tpl/header.qtpl:97
+//line app/vmalert/tpl/header.qtpl:93
 		qw422016.N().S(`
                 <li class="nav-item">
                     `)
-//line app/vmalert/tpl/header.qtpl:100
+//line app/vmalert/tpl/header.qtpl:96
 		u, _ := url.Parse(item.Url)
 
-//line app/vmalert/tpl/header.qtpl:101
+//line app/vmalert/tpl/header.qtpl:97
 		qw422016.N().S(`
                     <a class="nav-link`)
-//line app/vmalert/tpl/header.qtpl:102
+//line app/vmalert/tpl/header.qtpl:98
 		if current == item.Name {
-//line app/vmalert/tpl/header.qtpl:102
+//line app/vmalert/tpl/header.qtpl:98
 			qw422016.N().S(` active`)
-//line app/vmalert/tpl/header.qtpl:102
+//line app/vmalert/tpl/header.qtpl:98
 		}
-//line app/vmalert/tpl/header.qtpl:102
+//line app/vmalert/tpl/header.qtpl:98
 		qw422016.N().S(`"
                        href="`)
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 		if u.IsAbs() {
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 			qw422016.E().S(item.Url)
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 		} else {
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 			qw422016.E().S(path.Join(prefix, item.Url))
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 		}
-//line app/vmalert/tpl/header.qtpl:103
+//line app/vmalert/tpl/header.qtpl:99
 		qw422016.N().S(`">
                         `)
-//line app/vmalert/tpl/header.qtpl:104
+//line app/vmalert/tpl/header.qtpl:100
 		qw422016.E().S(item.Name)
-//line app/vmalert/tpl/header.qtpl:104
+//line app/vmalert/tpl/header.qtpl:100
 		qw422016.N().S(`
                     </a>
                 </li>
             `)
-//line app/vmalert/tpl/header.qtpl:107
+//line app/vmalert/tpl/header.qtpl:103
 	}
-//line app/vmalert/tpl/header.qtpl:107
+//line app/vmalert/tpl/header.qtpl:103
 	qw422016.N().S(`
         </ul>
   </div>
 </nav>
 `)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 }
 
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 func writeprintNavItems(qq422016 qtio422016.Writer, r *http.Request, current string, items []NavItem) {
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	streamprintNavItems(qw422016, r, current, items)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	qt422016.ReleaseWriter(qw422016)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 }
 
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 func printNavItems(r *http.Request, current string, items []NavItem) string {
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	qb422016 := qt422016.AcquireByteBuffer()
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	writeprintNavItems(qb422016, r, current, items)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	qs422016 := string(qb422016.B)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	qt422016.ReleaseByteBuffer(qb422016)
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 	return qs422016
-//line app/vmalert/tpl/header.qtpl:111
+//line app/vmalert/tpl/header.qtpl:107
 }

app/vmalert/utils/links.go

@@ -1,13 +1,24 @@
 package utils
 
-import "strings"
+import (
+	"net/url"
+	"strings"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
+)
 
 const prefix = "/vmalert/"
 
 // Prefix returns "/vmalert/" prefix if it is missing in the path.
 func Prefix(path string) string {
+	pp := httpserver.GetPathPrefix()
+	path = strings.TrimLeft(path, pp)
 	if strings.HasPrefix(path, prefix) {
-		return ""
+		return pp
 	}
-	return prefix
+	res, err := url.JoinPath(pp, prefix)
+	if err != nil {
+		return path
+	}
+	return res
 }

app/vmalert/web.go

@@ -211,7 +211,7 @@ func (rh *requestHandler) groups() []APIGroup {
 	rh.m.groupsMu.RLock()
 	defer rh.m.groupsMu.RUnlock()
 
-	var groups []APIGroup
+	groups := make([]APIGroup, 0)
 	for _, g := range rh.m.groups {
 		groups = append(groups, g.toAPI())
 	}
@@ -276,6 +276,7 @@ func (rh *requestHandler) listAlerts() ([]byte, error) {
 	defer rh.m.groupsMu.RUnlock()
 
 	lr := listAlertsResponse{Status: "success"}
+	lr.Data.Alerts = make([]*APIAlert, 0)
 	for _, g := range rh.m.groups {
 		for _, r := range g.Rules {
 			a, ok := r.(*AlertingRule)

app/vmalert/web_test.go

@@ -144,5 +144,81 @@ func TestHandler(t *testing.T) {
 	t.Run("/api/v1/1/0/status", func(t *testing.T) {
 		getResp(ts.URL+"/api/v1/1/0/status", nil, 404)
 	})
-
+}
+
+func TestEmptyResponse(t *testing.T) {
+	rhWithNoGroups := &requestHandler{m: &manager{groups: make(map[uint64]*Group)}}
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { rhWithNoGroups.handler(w, r) }))
+	defer ts.Close()
+
+	getResp := func(url string, to interface{}, code int) {
+		t.Helper()
+		resp, err := http.Get(url)
+		if err != nil {
+			t.Fatalf("unexpected err %s", err)
+		}
+		if code != resp.StatusCode {
+			t.Errorf("unexpected status code %d want %d", resp.StatusCode, code)
+		}
+		defer func() {
+			if err := resp.Body.Close(); err != nil {
+				t.Errorf("err closing body %s", err)
+			}
+		}()
+		if to != nil {
+			if err = json.NewDecoder(resp.Body).Decode(to); err != nil {
+				t.Errorf("unexpected err %s", err)
+			}
+		}
+	}
+
+	t.Run("no groups /api/v1/alerts", func(t *testing.T) {
+		lr := listAlertsResponse{}
+		getResp(ts.URL+"/api/v1/alerts", &lr, 200)
+		if lr.Data.Alerts == nil {
+			t.Errorf("expected /api/v1/alerts response to have non-nil data")
+		}
+
+		lr = listAlertsResponse{}
+		getResp(ts.URL+"/vmalert/api/v1/alerts", &lr, 200)
+		if lr.Data.Alerts == nil {
+			t.Errorf("expected /api/v1/alerts response to have non-nil data")
+		}
+	})
+
+	t.Run("no groups /api/v1/rules", func(t *testing.T) {
+		lr := listGroupsResponse{}
+		getResp(ts.URL+"/api/v1/rules", &lr, 200)
+		if lr.Data.Groups == nil {
+			t.Errorf("expected /api/v1/rules response to have non-nil data")
+		}
+
+		lr = listGroupsResponse{}
+		getResp(ts.URL+"/vmalert/api/v1/rules", &lr, 200)
+		if lr.Data.Groups == nil {
+			t.Errorf("expected /api/v1/rules response to have non-nil data")
+		}
+	})
+
+	rhWithEmptyGroup := &requestHandler{m: &manager{groups: map[uint64]*Group{0: {Name: "test"}}}}
+	ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { rhWithEmptyGroup.handler(w, r) })
+
+	t.Run("empty group /api/v1/rules", func(t *testing.T) {
+		lr := listGroupsResponse{}
+		getResp(ts.URL+"/api/v1/rules", &lr, 200)
+		if lr.Data.Groups == nil {
+			t.Fatalf("expected /api/v1/rules response to have non-nil data")
+		}
+
+		lr = listGroupsResponse{}
+		getResp(ts.URL+"/vmalert/api/v1/rules", &lr, 200)
+		if lr.Data.Groups == nil {
+			t.Fatalf("expected /api/v1/rules response to have non-nil data")
+		}
+
+		group := lr.Data.Groups[0]
+		if group.Rules == nil {
+			t.Fatalf("expected /api/v1/rules response to have non-nil rules for group")
+		}
+	})
 }

app/vmauth/main.go

@@ -28,7 +28,8 @@ import (
 var (
 	httpListenAddr   = flag.String("httpListenAddr", ":8427", "TCP address to listen for http connections. See also -httpListenAddr.useProxyProtocol")
 	useProxyProtocol = flag.Bool("httpListenAddr.useProxyProtocol", false, "Whether to use proxy protocol for connections accepted at -httpListenAddr . "+
-		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt")
+		"See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt . "+
+		"With enabled proxy protocol http server cannot serve regular /metrics endpoint. Use -pushmetrics.url for metrics pushing")
 	maxIdleConnsPerBackend = flag.Int("maxIdleConnsPerBackend", 100, "The maximum number of idle connections vmauth can open per each backend host. "+
 		"See also -maxConcurrentRequests")
 	responseTimeout       = flag.Duration("responseTimeout", 5*time.Minute, "The timeout for receiving a response from backend")
@@ -46,7 +47,6 @@ func main() {
 	envflag.Parse()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
 
 	logger.Infof("starting vmauth at %q...", *httpListenAddr)
 	startTime := time.Now()
@@ -54,8 +54,10 @@ func main() {
 	go httpserver.Serve(*httpListenAddr, *useProxyProtocol, requestHandler)
 	logger.Infof("started vmauth in %.3f seconds", time.Since(startTime).Seconds())
 
+	pushmetrics.Init()
 	sig := procutil.WaitForSigterm()
 	logger.Infof("received signal %s", sig)
+	pushmetrics.Stop()
 
 	startTime = time.Now()
 	logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
@@ -94,15 +96,15 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
 	ui := ac[authToken]
 	if ui == nil {
 		invalidAuthTokenRequests.Inc()
-		err := fmt.Errorf("cannot find the provided auth token %q in config", authToken)
 		if *logInvalidAuthTokens {
+			err := fmt.Errorf("cannot find the provided auth token %q in config", authToken)
 			err = &httpserver.ErrorWithStatusCode{
 				Err:        err,
 				StatusCode: http.StatusUnauthorized,
 			}
 			httpserver.Errorf(w, r, "%s", err)
 		} else {
-			http.Error(w, err.Error(), http.StatusUnauthorized)
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
 		}
 		return true
 	}

app/vmbackup/main.go

@@ -47,31 +47,36 @@ func main() {
 	envflag.Parse()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
+
+	// Storing snapshot delete function to be able to call it in case
+	// of error since logger.Fatal will exit the program without
+	// calling deferred functions.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2055
+	deleteSnapshot := func() {}
 
 	if len(*snapshotCreateURL) > 0 {
 		// create net/url object
-		createUrl, err := url.Parse(*snapshotCreateURL)
+		createURL, err := url.Parse(*snapshotCreateURL)
 		if err != nil {
 			logger.Fatalf("cannot parse snapshotCreateURL: %s", err)
 		}
 		if len(*snapshotName) > 0 {
 			logger.Fatalf("-snapshotName shouldn't be set if -snapshot.createURL is set, since snapshots are created automatically in this case")
 		}
-		logger.Infof("Snapshot create url %s", createUrl.Redacted())
+		logger.Infof("Snapshot create url %s", createURL.Redacted())
 		if len(*snapshotDeleteURL) <= 0 {
 			err := flag.Set("snapshot.deleteURL", strings.Replace(*snapshotCreateURL, "/create", "/delete", 1))
 			if err != nil {
 				logger.Fatalf("Failed to set snapshot.deleteURL flag: %v", err)
 			}
 		}
-		deleteUrl, err := url.Parse(*snapshotDeleteURL)
+		deleteURL, err := url.Parse(*snapshotDeleteURL)
 		if err != nil {
 			logger.Fatalf("cannot parse snapshotDeleteURL: %s", err)
 		}
-		logger.Infof("Snapshot delete url %s", deleteUrl.Redacted())
+		logger.Infof("Snapshot delete url %s", deleteURL.Redacted())
 
-		name, err := snapshot.Create(createUrl.String())
+		name, err := snapshot.Create(createURL.String())
 		if err != nil {
 			logger.Fatalf("cannot create snapshot: %s", err)
 		}
@@ -80,32 +85,50 @@ func main() {
 			logger.Fatalf("cannot set snapshotName flag: %v", err)
 		}
 
-		defer func() {
-			err := snapshot.Delete(deleteUrl.String(), name)
+		deleteSnapshot = func() {
+			err := snapshot.Delete(deleteURL.String(), name)
 			if err != nil {
 				logger.Fatalf("cannot delete snapshot: %s", err)
 			}
-		}()
+		}
 	} else if len(*snapshotName) == 0 {
 		logger.Fatalf("`-snapshotName` or `-snapshot.createURL` must be provided")
 	}
-	if err := snapshot.Validate(*snapshotName); err != nil {
-		logger.Fatalf("invalid -snapshotName=%q: %s", *snapshotName, err)
-	}
 
 	go httpserver.Serve(*httpListenAddr, false, nil)
 
+	pushmetrics.Init()
+	err := makeBackup()
+	deleteSnapshot()
+	if err != nil {
+		logger.Fatalf("cannot create backup: %s", err)
+	}
+	pushmetrics.Stop()
+
+	startTime := time.Now()
+	logger.Infof("gracefully shutting down http server for metrics at %q", *httpListenAddr)
+	if err := httpserver.Stop(*httpListenAddr); err != nil {
+		logger.Fatalf("cannot stop http server for metrics: %s", err)
+	}
+	logger.Infof("successfully shut down http server for metrics in %.3f seconds", time.Since(startTime).Seconds())
+}
+
+func makeBackup() error {
+	if err := snapshot.Validate(*snapshotName); err != nil {
+		return fmt.Errorf("invalid -snapshotName=%q: %s", *snapshotName, err)
+	}
+
 	srcFS, err := newSrcFS()
 	if err != nil {
-		logger.Fatalf("%s", err)
+		return err
 	}
 	dstFS, err := newDstFS()
 	if err != nil {
-		logger.Fatalf("%s", err)
+		return err
 	}
 	originFS, err := newOriginFS()
 	if err != nil {
-		logger.Fatalf("%s", err)
+		return err
 	}
 	a := &actions.Backup{
 		Concurrency: *concurrency,
@@ -114,18 +137,12 @@ func main() {
 		Origin:      originFS,
 	}
 	if err := a.Run(); err != nil {
-		logger.Fatalf("cannot create backup: %s", err)
+		return err
 	}
 	srcFS.MustStop()
 	dstFS.MustStop()
 	originFS.MustStop()
-
-	startTime := time.Now()
-	logger.Infof("gracefully shutting down http server for metrics at %q", *httpListenAddr)
-	if err := httpserver.Stop(*httpListenAddr); err != nil {
-		logger.Fatalf("cannot stop http server for metrics: %s", err)
-	}
-	logger.Infof("successfully shut down http server for metrics in %.3f seconds", time.Since(startTime).Seconds())
+	return nil
 }
 
 func usage() {
@@ -189,7 +206,20 @@ func hasFilepathPrefix(path, prefix string) bool {
 	if err != nil {
 		return false
 	}
-	return strings.HasPrefix(pathAbs, prefixAbs)
+	if prefixAbs == pathAbs {
+		return true
+	}
+	rel, err := filepath.Rel(prefixAbs, pathAbs)
+	if err != nil {
+		// if paths can't be related - they don't match
+		return false
+	}
+	if i := strings.Index(rel, "."); i == 0 {
+		// if path can be related only with . as first char - they still don't match
+		return false
+	}
+	// if paths are related - it is a match
+	return true
 }
 
 func newOriginFS() (common.OriginFS, error) {

app/vmbackup/main_test.go

@@ -26,4 +26,9 @@ func TestHasFilepathPrefix(t *testing.T) {
 	f("fs://"+pwd+"/foo", pwd+"/foo/bar", false)
 	f("fs://"+pwd+"/foo/bar", pwd+"/foo", true)
 	f("fs://"+pwd+"/foo", pwd+"/bar", false)
+	f("fs:///data1", "/data", false)
+	f("fs:///data", "/data1", false)
+	f("fs:///data", "/data/foo", false)
+	f("fs:///data/foo", "/data", true)
+	f("fs:///data/foo/", "/data/", true)
 }

app/vmctl/flags.go

@@ -434,9 +434,10 @@ var (
 			Value: 1,
 		},
 		&cli.TimestampFlag{
-			Name:   remoteReadFilterTimeStart,
-			Usage:  "The time filter in RFC3339 format to select timeseries with timestamp equal or higher than provided value. E.g. '2020-01-01T20:07:00Z'",
-			Layout: time.RFC3339,
+			Name:     remoteReadFilterTimeStart,
+			Usage:    "The time filter in RFC3339 format to select timeseries with timestamp equal or higher than provided value. E.g. '2020-01-01T20:07:00Z'",
+			Layout:   time.RFC3339,
+			Required: true,
 		},
 		&cli.TimestampFlag{
 			Name:   remoteReadFilterTimeEnd,

app/vmctl/influx/influx.go

@@ -153,6 +153,10 @@ func (c *Client) Explore() ([]*Series, error) {
 		return nil, fmt.Errorf("failed to get field keys: %s", err)
 	}
 
+	if len(mFields) < 1 {
+		return nil, fmt.Errorf("found no numeric fields for import in database %q", c.database)
+	}
+
 	series, err := c.getSeries()
 	if err != nil {
 		return nil, fmt.Errorf("failed to get series: %s", err)
@@ -162,7 +166,8 @@ func (c *Client) Explore() ([]*Series, error) {
 	for _, s := range series {
 		fields, ok := mFields[s.Measurement]
 		if !ok {
-			return nil, fmt.Errorf("can't find field keys for measurement %q", s.Measurement)
+			log.Printf("skip measurement %q since it has no fields", s.Measurement)
+			continue
 		}
 		for _, field := range fields {
 			is := &Series{

app/vmctl/opentsdb/parser.go

@@ -180,7 +180,7 @@ func modifyData(msg Metric, normalize bool) (Metric, error) {
 	/*
 		replace bad characters in metric name with _ per the data model
 	*/
-	finalMsg.Metric = promrelabel.SanitizeName(name)
+	finalMsg.Metric = promrelabel.SanitizeMetricName(name)
 	// replace bad characters in tag keys with _ per the data model
 	for key, value := range msg.Tags {
 		// if normalization requested, lowercase the key and value
@@ -191,7 +191,7 @@ func modifyData(msg Metric, normalize bool) (Metric, error) {
 		/*
 			replace all explicitly bad characters with _
 		*/
-		key = promrelabel.SanitizeName(key)
+		key = promrelabel.SanitizeLabelName(key)
 		// tags that start with __ are considered custom stats for internal prometheus stuff, we should drop them
 		if !strings.HasPrefix(key, "__") {
 			finalMsg.Tags[key] = value

app/vmctl/prometheus/prometheus.go

@@ -1,6 +1,7 @@
 package prometheus
 
 import (
+	"context"
 	"fmt"
 	"time"
 
@@ -120,7 +121,7 @@ func (c *Client) Read(block tsdb.BlockReader) (storage.SeriesSet, error) {
 	if err != nil {
 		return nil, err
 	}
-	ss := q.Select(false, nil, labels.MustNewMatcher(labels.MatchRegexp, c.filter.label, c.filter.labelValue))
+	ss := q.Select(context.Background(), false, nil, labels.MustNewMatcher(labels.MatchRegexp, c.filter.label, c.filter.labelValue))
 	return ss, nil
 }
 

app/vmctl/testdata/servers_integration_test/remote_read_server.go

@@ -156,7 +156,6 @@ func (rrs *RemoteReadServer) getStreamReadHandler(t *testing.T) http.Handler {
 		}
 
 		var chks []prompb.Chunk
-		ctx := context.Background()
 		for idx, r := range req.Queries {
 			startTs := r.StartTimestampMs
 			endTs := r.EndTimestampMs
@@ -166,12 +165,12 @@ func (rrs *RemoteReadServer) getStreamReadHandler(t *testing.T) http.Handler {
 
 			c := remote.NewSampleAndChunkQueryableClient(rrs.storage, nil, matchers, true, cb)
 
-			q, err := c.ChunkQuerier(ctx, startTs, endTs)
+			q, err := c.ChunkQuerier(startTs, endTs)
 			if err != nil {
 				t.Fatalf("error init chunk querier: %s", err)
 			}
 
-			ss := q.Select(false, nil, matchers...)
+			ss := q.Select(context.Background(), false, nil, matchers...)
 			var iter chunks.Iterator
 			for ss.Next() {
 				series := ss.At()

app/vminsert/common/streamaggr.go

@@ -99,6 +99,7 @@ func pushAggregateSeries(tss []prompbmarshal.TimeSeries) {
 	ctx.skipStreamAggr = true
 	for _, ts := range tss {
 		labels := ts.Labels
+		ctx.Labels = ctx.Labels[:0]
 		for _, label := range labels {
 			name := label.Name
 			if name == "__name__" {

app/vminsert/relabel/relabel.go

@@ -128,9 +128,9 @@ func (ctx *Ctx) ApplyRelabeling(labels []prompb.Label) []prompb.Label {
 		for i := range tmpLabels {
 			label := &tmpLabels[i]
 			if label.Name == "__name__" {
-				label.Value = promrelabel.SanitizeName(label.Value)
+				label.Value = promrelabel.SanitizeMetricName(label.Value)
 			} else {
-				label.Name = promrelabel.SanitizeName(label.Name)
+				label.Name = promrelabel.SanitizeLabelName(label.Name)
 			}
 		}
 	}

app/vmrestore/main.go

@@ -36,7 +36,6 @@ func main() {
 	envflag.Parse()
 	buildinfo.Init()
 	logger.Init()
-	pushmetrics.Init()
 
 	go httpserver.Serve(*httpListenAddr, false, nil)
 
@@ -54,9 +53,11 @@ func main() {
 		Dst:                     dstFS,
 		SkipBackupCompleteCheck: *skipBackupCompleteCheck,
 	}
+	pushmetrics.Init()
 	if err := a.Run(); err != nil {
 		logger.Fatalf("cannot restore from backup: %s", err)
 	}
+	pushmetrics.Stop()
 	srcFS.MustStop()
 	dstFS.MustStop()
 

app/vmselect/main.go

@@ -114,6 +114,13 @@ func RequestHandler(w http.ResponseWriter, r *http.Request) bool {
 			timerpool.Put(t)
 			qt.Printf("wait in queue because -search.maxConcurrentRequests=%d concurrent requests are executed", *maxConcurrentRequests)
 			defer func() { <-concurrencyLimitCh }()
+		case <-r.Context().Done():
+			timerpool.Put(t)
+			remoteAddr := httpserver.GetQuotedRemoteAddr(r)
+			requestURI := httpserver.GetRequestURI(r)
+			logger.Infof("client has cancelled the request after %.3f seconds: remoteAddr=%s, requestURI: %q",
+				d.Seconds(), remoteAddr, requestURI)
+			return true
 		case <-t.C:
 			timerpool.Put(t)
 			concurrencyLimitTimeout.Inc()

app/vmselect/netstorage/netstorage.go

@@ -148,40 +148,31 @@ func timeseriesWorker(qt *querytracer.Tracer, workChs []chan *timeseriesWork, wo
 	// Then help others with the remaining work.
 	rowsProcessed = 0
 	seriesProcessed = 0
-	idx := int(workerID)
-	for {
-		tsw, idxNext := stealTimeseriesWork(workChs, idx)
-		if tsw == nil {
-			// There is no more work
-			break
+	for i := uint(1); i < uint(len(workChs)); i++ {
+		idx := (i + workerID) % uint(len(workChs))
+		ch := workChs[idx]
+		for len(ch) > 0 {
+			// Do not call runtime.Gosched() here in order to give a chance
+			// the real owner of the work to complete it, since it consumes additional CPU
+			// and slows down the code on systems with big number of CPU cores.
+			// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3966#issuecomment-1483208419
+
+			// It is expected that every channel in the workChs is already closed,
+			// so the next line should return immediately.
+			tsw, ok := <-ch
+			if !ok {
+				break
+			}
+			tsw.err = tsw.do(&tmpResult.rs, workerID)
+			rowsProcessed += tsw.rowsProcessed
+			seriesProcessed++
 		}
-		tsw.err = tsw.do(&tmpResult.rs, workerID)
-		rowsProcessed += tsw.rowsProcessed
-		seriesProcessed++
-		idx = idxNext
 	}
 	qt.Printf("others work processed: series=%d, samples=%d", seriesProcessed, rowsProcessed)
 
 	putTmpResult(tmpResult)
 }
 
-func stealTimeseriesWork(workChs []chan *timeseriesWork, startIdx int) (*timeseriesWork, int) {
-	for i := startIdx; i < startIdx+len(workChs); i++ {
-		// Give a chance other goroutines to perform their work
-		runtime.Gosched()
-
-		idx := i % len(workChs)
-		ch := workChs[idx]
-		// It is expected that every channel in the workChs is already closed,
-		// so the next line should return immediately.
-		tsw, ok := <-ch
-		if ok {
-			return tsw, idx
-		}
-	}
-	return nil, startIdx
-}
-
 func getTmpResult() *result {
 	v := resultPool.Get()
 	if v == nil {
@@ -207,10 +198,17 @@ type result struct {
 
 var resultPool sync.Pool
 
+// MaxWorkers returns the maximum number of workers netstorage can spin when calling RunParallel()
+func MaxWorkers() int {
+	return gomaxprocs
+}
+
+var gomaxprocs = cgroup.AvailableCPUs()
+
 // RunParallel runs f in parallel for all the results from rss.
 //
 // f shouldn't hold references to rs after returning.
-// workerID is the id of the worker goroutine that calls f.
+// workerID is the id of the worker goroutine that calls f. The workerID is in the range [0..MaxWorkers()-1].
 // Data processing is immediately stopped if f returns non-nil error.
 //
 // rss becomes unusable after the call to RunParallel.
@@ -244,7 +242,8 @@ func (rss *Results) runParallel(qt *querytracer.Tracer, f func(rs *Result, worke
 		tsw.f = f
 		tsw.mustStop = &mustStop
 	}
-	if gomaxprocs == 1 || tswsLen == 1 {
+	maxWorkers := MaxWorkers()
+	if maxWorkers == 1 || tswsLen == 1 {
 		// It is faster to process time series in the current goroutine.
 		tsw := getTimeseriesWork()
 		tmpResult := getTmpResult()
@@ -280,8 +279,8 @@ func (rss *Results) runParallel(qt *querytracer.Tracer, f func(rs *Result, worke
 
 	// Prepare worker channels.
 	workers := len(tsws)
-	if workers > gomaxprocs {
-		workers = gomaxprocs
+	if workers > maxWorkers {
+		workers = maxWorkers
 	}
 	itemsPerWorker := (len(tsws) + workers - 1) / workers
 	workChs := make([]chan *timeseriesWork, workers)
@@ -333,8 +332,6 @@ var (
 	seriesReadPerQuery = metrics.NewHistogram(`vm_series_read_per_query`)
 )
 
-var gomaxprocs = cgroup.AvailableCPUs()
-
 type packedTimeseries struct {
 	metricName string
 	brs        []blockRef
@@ -391,37 +388,25 @@ func unpackWorker(workChs []chan *unpackWork, workerID uint) {
 	}
 
 	// Then help others with their work.
-	idx := int(workerID)
-	for {
-		upw, idxNext := stealUnpackWork(workChs, idx)
-		if upw == nil {
-			// There is no more work
-			break
+	for i := uint(1); i < uint(len(workChs)); i++ {
+		idx := (i + workerID) % uint(len(workChs))
+		ch := workChs[idx]
+		for len(ch) > 0 {
+			// Give a chance other goroutines to perform their work
+			runtime.Gosched()
+			// It is expected that every channel in the workChs is already closed,
+			// so the next line should return immediately.
+			upw, ok := <-ch
+			if !ok {
+				break
+			}
+			upw.unpack(tmpBlock)
 		}
-		upw.unpack(tmpBlock)
-		idx = idxNext
 	}
 
 	putTmpStorageBlock(tmpBlock)
 }
 
-func stealUnpackWork(workChs []chan *unpackWork, startIdx int) (*unpackWork, int) {
-	for i := startIdx; i < startIdx+len(workChs); i++ {
-		// Give a chance other goroutines to perform their work
-		runtime.Gosched()
-
-		idx := i % len(workChs)
-		ch := workChs[idx]
-		// It is expected that every channel in the workChs is already closed,
-		// so the next line should return immediately.
-		upw, ok := <-ch
-		if ok {
-			return upw, idx
-		}
-	}
-	return nil, startIdx
-}
-
 func getTmpStorageBlock() *storage.Block {
 	v := tmpStorageBlockPool.Get()
 	if v == nil {
@@ -1017,7 +1002,6 @@ func ExportBlocks(qt *querytracer.Tracer, sq *storage.SearchQuery, deadline sear
 	indexSearchDuration.UpdateDuration(startTime)
 
 	// Start workers that call f in parallel on available CPU cores.
-	gomaxprocs := cgroup.AvailableCPUs()
 	workCh := make(chan *exportWork, gomaxprocs*8)
 	var (
 		errGlobal     error
@@ -1187,8 +1171,10 @@ func ProcessSearchQuery(qt *querytracer.Tracer, sq *storage.SearchQuery, deadlin
 			putStorageSearch(sr)
 			return nil, fmt.Errorf("cannot write %d bytes to temporary file: %w", len(buf), err)
 		}
-		metricName := bytesutil.InternBytes(sr.MetricBlockRef.MetricName)
-		brs := m[metricName]
+		// Do not intern mb.MetricName, since it leads to increased memory usage.
+		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3692
+		metricName := sr.MetricBlockRef.MetricName
+		brs := m[string(metricName)]
 		if brs == nil {
 			brs = &blockRefs{}
 			brs.brs = brs.brsPrealloc[:0]
@@ -1198,8 +1184,9 @@ func ProcessSearchQuery(qt *querytracer.Tracer, sq *storage.SearchQuery, deadlin
 			addr:    addr,
 		})
 		if len(brs.brs) == 1 {
-			orderedMetricNames = append(orderedMetricNames, metricName)
-			m[metricName] = brs
+			metricNameStr := string(metricName)
+			orderedMetricNames = append(orderedMetricNames, metricNameStr)
+			m[metricNameStr] = brs
 		}
 	}
 	if err := sr.Error(); err != nil {

app/vmselect/netstorage/tmp_blocks_file.go

@@ -142,6 +142,9 @@ func (tbf *tmpBlocksFile) Finalize() error {
 	// This should reduce the number of disk seeks, which is important
 	// for HDDs.
 	r.MustFadviseSequentialRead(true)
+	// Collect local stats in order to improve performance on systems with big number of CPU cores.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3966
+	r.SetUseLocalStats()
 	tbf.r = r
 	return nil
 }

app/vmselect/prometheus/export.qtpl

@@ -149,11 +149,11 @@
 	{% if len(mn.Tags) > 0 %}
 	{
 		{% code tags := mn.Tags %}
-		{%z= tags[0].Key %}={%qz= tags[0].Value %}
+		{%z= tags[0].Key %}={%= escapePrometheusLabel(tags[0].Value) %}
 		{% code tags = tags[1:] %}
 		{% for i := range tags %}
 			{% code tag := &tags[i] %}
-			,{%z= tag.Key %}={%qz= tag.Value %}
+			,{%z= tag.Key %}={%= escapePrometheusLabel(tag.Value) %}
 		{% endfor %}
 	}
 	{% endif %}
@@ -173,4 +173,26 @@
 	{% endif %}
 {% endfunc %}
 
+{% func escapePrometheusLabel(b []byte) %}
+	"
+	{% for len(b) > 0 %}
+		{% code n := bytes.IndexAny(b, "\\\n\"") %}
+		{% if n < 0 %}
+			{%z= b %}
+			{% break %}
+		{% endif %}
+		{%z= b[:n] %}
+		{% switch b[n] %}
+		{% case '\\' %}
+			\\
+		{% case '\n' %}
+			\n
+		{% case '"' %}
+			\"
+		{% endswitch %}
+		{% code b = b[n+1:] %}
+	{% endfor %}
+	"
+{% endfunc %}
+
 {% endstripspace %}

app/vmselect/prometheus/export.qtpl.go

@@ -495,7 +495,7 @@ func streamprometheusMetricName(qw422016 *qt422016.Writer, mn *storage.MetricNam
 //line app/vmselect/prometheus/export.qtpl:152
 		qw422016.N().S(`=`)
 //line app/vmselect/prometheus/export.qtpl:152
-		qw422016.N().QZ(tags[0].Value)
+		streamescapePrometheusLabel(qw422016, tags[0].Value)
 //line app/vmselect/prometheus/export.qtpl:153
 		tags = tags[1:]
 
@@ -511,7 +511,7 @@ func streamprometheusMetricName(qw422016 *qt422016.Writer, mn *storage.MetricNam
 //line app/vmselect/prometheus/export.qtpl:156
 			qw422016.N().S(`=`)
 //line app/vmselect/prometheus/export.qtpl:156
-			qw422016.N().QZ(tag.Value)
+			streamescapePrometheusLabel(qw422016, tag.Value)
 //line app/vmselect/prometheus/export.qtpl:157
 		}
 //line app/vmselect/prometheus/export.qtpl:157
@@ -599,3 +599,74 @@ func convertValueToSpecialJSON(v float64) string {
 	return qs422016
 //line app/vmselect/prometheus/export.qtpl:174
 }
+
+//line app/vmselect/prometheus/export.qtpl:176
+func streamescapePrometheusLabel(qw422016 *qt422016.Writer, b []byte) {
+//line app/vmselect/prometheus/export.qtpl:176
+	qw422016.N().S(`"`)
+//line app/vmselect/prometheus/export.qtpl:178
+	for len(b) > 0 {
+//line app/vmselect/prometheus/export.qtpl:179
+		n := bytes.IndexAny(b, "\\\n\"")
+
+//line app/vmselect/prometheus/export.qtpl:180
+		if n < 0 {
+//line app/vmselect/prometheus/export.qtpl:181
+			qw422016.N().Z(b)
+//line app/vmselect/prometheus/export.qtpl:182
+			break
+//line app/vmselect/prometheus/export.qtpl:183
+		}
+//line app/vmselect/prometheus/export.qtpl:184
+		qw422016.N().Z(b[:n])
+//line app/vmselect/prometheus/export.qtpl:185
+		switch b[n] {
+//line app/vmselect/prometheus/export.qtpl:186
+		case '\\':
+//line app/vmselect/prometheus/export.qtpl:186
+			qw422016.N().S(`\\`)
+//line app/vmselect/prometheus/export.qtpl:188
+		case '\n':
+//line app/vmselect/prometheus/export.qtpl:188
+			qw422016.N().S(`\n`)
+//line app/vmselect/prometheus/export.qtpl:190
+		case '"':
+//line app/vmselect/prometheus/export.qtpl:190
+			qw422016.N().S(`\"`)
+//line app/vmselect/prometheus/export.qtpl:192
+		}
+//line app/vmselect/prometheus/export.qtpl:193
+		b = b[n+1:]
+
+//line app/vmselect/prometheus/export.qtpl:194
+	}
+//line app/vmselect/prometheus/export.qtpl:194
+	qw422016.N().S(`"`)
+//line app/vmselect/prometheus/export.qtpl:196
+}
+
+//line app/vmselect/prometheus/export.qtpl:196
+func writeescapePrometheusLabel(qq422016 qtio422016.Writer, b []byte) {
+//line app/vmselect/prometheus/export.qtpl:196
+	qw422016 := qt422016.AcquireWriter(qq422016)
+//line app/vmselect/prometheus/export.qtpl:196
+	streamescapePrometheusLabel(qw422016, b)
+//line app/vmselect/prometheus/export.qtpl:196
+	qt422016.ReleaseWriter(qw422016)
+//line app/vmselect/prometheus/export.qtpl:196
+}
+
+//line app/vmselect/prometheus/export.qtpl:196
+func escapePrometheusLabel(b []byte) string {
+//line app/vmselect/prometheus/export.qtpl:196
+	qb422016 := qt422016.AcquireByteBuffer()
+//line app/vmselect/prometheus/export.qtpl:196
+	writeescapePrometheusLabel(qb422016, b)
+//line app/vmselect/prometheus/export.qtpl:196
+	qs422016 := string(qb422016.B)
+//line app/vmselect/prometheus/export.qtpl:196
+	qt422016.ReleaseByteBuffer(qb422016)
+//line app/vmselect/prometheus/export.qtpl:196
+	return qs422016
+//line app/vmselect/prometheus/export.qtpl:196
+}

app/vmselect/prometheus/federate_test.go

@@ -0,0 +1,43 @@
+package prometheus
+
+import (
+	"testing"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
+)
+
+func TestFederate(t *testing.T) {
+	f := func(rs *netstorage.Result, expectedResult string) {
+		t.Helper()
+		result := Federate(rs)
+		if result != expectedResult {
+			t.Fatalf("unexpected result; got\n%s\nwant\n%s", result, expectedResult)
+		}
+	}
+
+	f(&netstorage.Result{}, ``)
+
+	f(&netstorage.Result{
+		MetricName: storage.MetricName{
+			MetricGroup: []byte("foo"),
+			Tags: []storage.Tag{
+				{
+					Key:   []byte("a"),
+					Value: []byte("b"),
+				},
+				{
+					Key:   []byte("qqq"),
+					Value: []byte("\\"),
+				},
+				{
+					Key: []byte("abc"),
+					// Verify that < isn't encoded. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5431
+					Value: []byte("a<b\"\\c"),
+				},
+			},
+		},
+		Values:     []float64{1.23},
+		Timestamps: []int64{123},
+	}, `foo{a="b",qqq="\\",abc="a<b\"\\c"} 1.23 123`+"\n")
+}

app/vmselect/prometheus/federate_timing_test.go

@@ -0,0 +1,38 @@
+package prometheus
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
+)
+
+func BenchmarkFederate(b *testing.B) {
+	rs := &netstorage.Result{
+		MetricName: storage.MetricName{
+			MetricGroup: []byte("foo_bar_bazaaaa_total"),
+			Tags: []storage.Tag{
+				{
+					Key:   []byte("instance"),
+					Value: []byte("foobarbaz:2344"),
+				},
+				{
+					Key:   []byte("job"),
+					Value: []byte("aaabbbccc"),
+				},
+			},
+		},
+		Values:     []float64{112.23},
+		Timestamps: []int64{1234567890},
+	}
+
+	b.ReportAllocs()
+	b.RunParallel(func(pb *testing.PB) {
+		var bb bytes.Buffer
+		for pb.Next() {
+			bb.Reset()
+			WriteFederate(&bb, rs)
+		}
+	})
+}

app/vmselect/promql/aggr.go

@@ -614,13 +614,14 @@ func newAggrFuncTopK(isReverse bool) aggrFunc {
 		}
 		afe := func(tss []*timeseries, modififer *metricsql.ModifierExpr) []*timeseries {
 			for n := range tss[0].Values {
+				lessFunc := lessWithNaNs
+				if isReverse {
+					lessFunc = greaterWithNaNs
+				}
 				sort.Slice(tss, func(i, j int) bool {
 					a := tss[i].Values[n]
 					b := tss[j].Values[n]
-					if isReverse {
-						a, b = b, a
-					}
-					return lessWithNaNs(a, b)
+					return lessFunc(a, b)
 				})
 				fillNaNsAtIdx(n, ks[n], tss)
 			}
@@ -673,17 +674,19 @@ func getRangeTopKTimeseries(tss []*timeseries, modifier *metricsql.ModifierExpr,
 			value: value,
 		}
 	}
+	lessFunc := lessWithNaNs
+	if isReverse {
+		lessFunc = greaterWithNaNs
+	}
 	sort.Slice(maxs, func(i, j int) bool {
 		a := maxs[i].value
 		b := maxs[j].value
-		if isReverse {
-			a, b = b, a
-		}
-		return lessWithNaNs(a, b)
+		return lessFunc(a, b)
 	})
 	for i := range maxs {
 		tss[i] = maxs[i].ts
 	}
+
 	remainingSumTS := getRemainingSumTimeseries(tss, modifier, ks, remainingSumTagName)
 	for i, k := range ks {
 		fillNaNsAtIdx(i, k, tss)
@@ -1164,12 +1167,27 @@ func newAggrQuantileFunc(phis []float64) func(tss []*timeseries, modifier *metri
 }
 
 func lessWithNaNs(a, b float64) bool {
+	// consider NaNs are smaller than non-NaNs
 	if math.IsNaN(a) {
 		return !math.IsNaN(b)
 	}
+	if math.IsNaN(b) {
+		return false
+	}
 	return a < b
 }
 
+func greaterWithNaNs(a, b float64) bool {
+	// consider NaNs are bigger than non-NaNs
+	if math.IsNaN(a) {
+		return !math.IsNaN(b)
+	}
+	if math.IsNaN(b) {
+		return false
+	}
+	return a > b
+}
+
 func floatToIntBounded(f float64) int {
 	if f > math.MaxInt {
 		return math.MaxInt

app/vmselect/promql/aggr_incremental.go

@@ -3,8 +3,9 @@ package promql
 import (
 	"math"
 	"strings"
-	"sync"
+	"unsafe"
 
+	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/VictoriaMetrics/metricsql"
 )
@@ -63,31 +64,36 @@ var incrementalAggrFuncCallbacksMap = map[string]*incrementalAggrFuncCallbacks{
 	},
 }
 
+type incrementalAggrContextMap struct {
+	m map[string]*incrementalAggrContext
+
+	// The padding prevents false sharing on widespread platforms with
+	// 128 mod (cache line size) = 0 .
+	_ [128 - unsafe.Sizeof(map[string]*incrementalAggrContext{})%128]byte
+}
+
 type incrementalAggrFuncContext struct {
 	ae *metricsql.AggrFuncExpr
 
-	m sync.Map
+	byWorkerID []incrementalAggrContextMap
 
 	callbacks *incrementalAggrFuncCallbacks
 }
 
 func newIncrementalAggrFuncContext(ae *metricsql.AggrFuncExpr, callbacks *incrementalAggrFuncCallbacks) *incrementalAggrFuncContext {
 	return &incrementalAggrFuncContext{
-		ae:        ae,
-		callbacks: callbacks,
+		ae:         ae,
+		byWorkerID: make([]incrementalAggrContextMap, netstorage.MaxWorkers()),
+		callbacks:  callbacks,
 	}
 }
 
 func (iafc *incrementalAggrFuncContext) updateTimeseries(tsOrig *timeseries, workerID uint) {
-	v, ok := iafc.m.Load(workerID)
-	if !ok {
-		// It is safe creating and storing m in iafc.m without locking,
-		// since it is guaranteed that only a single goroutine can execute
-		// code for the given workerID at a time.
-		v = make(map[string]*incrementalAggrContext, 1)
-		iafc.m.Store(workerID, v)
+	v := &iafc.byWorkerID[workerID]
+	if v.m == nil {
+		v.m = make(map[string]*incrementalAggrContext, 1)
 	}
-	m := v.(map[string]*incrementalAggrContext)
+	m := v.m
 
 	ts := tsOrig
 	keepOriginal := iafc.callbacks.keepOriginal
@@ -128,9 +134,9 @@ func (iafc *incrementalAggrFuncContext) updateTimeseries(tsOrig *timeseries, wor
 func (iafc *incrementalAggrFuncContext) finalizeTimeseries() []*timeseries {
 	mGlobal := make(map[string]*incrementalAggrContext)
 	mergeAggrFunc := iafc.callbacks.mergeAggrFunc
-	iafc.m.Range(func(k, v interface{}) bool {
-		m := v.(map[string]*incrementalAggrContext)
-		for k, iac := range m {
+	byWorkerID := iafc.byWorkerID
+	for i := range byWorkerID {
+		for k, iac := range byWorkerID[i].m {
 			iacGlobal := mGlobal[k]
 			if iacGlobal == nil {
 				if iafc.ae.Limit > 0 && len(mGlobal) >= iafc.ae.Limit {
@@ -142,8 +148,7 @@ func (iafc *incrementalAggrFuncContext) finalizeTimeseries() []*timeseries {
 			}
 			mergeAggrFunc(iacGlobal, iac)
 		}
-		return true
-	})
+	}
 	tss := make([]*timeseries, 0, len(mGlobal))
 	finalizeAggrFunc := iafc.callbacks.finalizeAggrFunc
 	for _, iac := range mGlobal {

app/vmselect/promql/aggr_incremental_test.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 	"testing"
 
+	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/metricsql"
 )
 
@@ -99,7 +100,7 @@ func TestIncrementalAggr(t *testing.T) {
 }
 
 func testIncrementalParallelAggr(iafc *incrementalAggrFuncContext, tssSrc, tssExpected []*timeseries) error {
-	const workersCount = 3
+	workersCount := netstorage.MaxWorkers()
 	tsCh := make(chan *timeseries)
 	var wg sync.WaitGroup
 	wg.Add(workersCount)

app/vmselect/promql/aggr_test.go

@@ -2,9 +2,57 @@ package promql
 
 import (
 	"math"
+	"sort"
 	"testing"
 )
 
+func TestSortWithNaNs(t *testing.T) {
+	f := func(a []float64, ascExpected, descExpected []float64) {
+		t.Helper()
+
+		equalSlices := func(a, b []float64) bool {
+			for i := range a {
+				x := a[i]
+				y := b[i]
+				if math.IsNaN(x) {
+					return math.IsNaN(y)
+				}
+				if math.IsNaN(y) {
+					return false
+				}
+				if x != y {
+					return false
+				}
+			}
+			return true
+		}
+
+		aCopy := append([]float64{}, a...)
+		sort.Slice(aCopy, func(i, j int) bool {
+			return lessWithNaNs(aCopy[i], aCopy[j])
+		})
+		if !equalSlices(aCopy, ascExpected) {
+			t.Fatalf("unexpected slice after asc sorting; got\n%v\nwant\n%v", aCopy, ascExpected)
+		}
+
+		aCopy = append(aCopy[:0], a...)
+		sort.Slice(aCopy, func(i, j int) bool {
+			return greaterWithNaNs(aCopy[i], aCopy[j])
+		})
+		if !equalSlices(aCopy, descExpected) {
+			t.Fatalf("unexpected slice after desc sorting; got\n%v\nwant\n%v", aCopy, descExpected)
+		}
+	}
+
+	f(nil, nil, nil)
+	f([]float64{1}, []float64{1}, []float64{1})
+	f([]float64{1, nan, 3, 2}, []float64{nan, 1, 2, 3}, []float64{nan, 3, 2, 1})
+	f([]float64{nan}, []float64{nan}, []float64{nan})
+	f([]float64{nan, nan, nan}, []float64{nan, nan, nan}, []float64{nan, nan, nan})
+	f([]float64{nan, 1, nan}, []float64{nan, nan, 1}, []float64{nan, nan, 1})
+	f([]float64{nan, 1, 0, 2, nan}, []float64{nan, nan, 0, 1, 2}, []float64{nan, nan, 2, 1, 0})
+}
+
 func TestModeNoNaNs(t *testing.T) {
 	f := func(prevValue float64, a []float64, expectedResult float64) {
 		t.Helper()

app/vmselect/promql/eval.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"sync"
 	"sync/atomic"
+	"unsafe"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
@@ -635,10 +636,7 @@ func tryGetArgRollupFuncWithMetricExpr(ae *metricsql.AggrFuncExpr) (*metricsql.F
 			return nil, nil
 		}
 		// e = rollupFunc(metricExpr)
-		return &metricsql.FuncExpr{
-			Name: fe.Name,
-			Args: []metricsql.Expr{me},
-		}, nrf
+		return fe, nrf
 	}
 	if re, ok := arg.(*metricsql.RollupExpr); ok {
 		if me, ok := re.Expr.(*metricsql.MetricExpr); !ok || me.IsEmpty() || re.ForSubquery() {
@@ -893,31 +891,34 @@ func evalRollupFuncWithSubquery(qt *querytracer.Tracer, ec *EvalConfig, funcName
 	if err != nil {
 		return nil, err
 	}
-	tss := make([]*timeseries, 0, len(tssSQ)*len(rcs))
-	var tssLock sync.Mutex
+
 	var samplesScannedTotal uint64
 	keepMetricNames := getKeepMetricNames(expr)
-	doParallel(tssSQ, func(tsSQ *timeseries, values []float64, timestamps []int64) ([]float64, []int64) {
+	tsw := getTimeseriesByWorkerID()
+	seriesByWorkerID := tsw.byWorkerID
+	doParallel(tssSQ, func(tsSQ *timeseries, values []float64, timestamps []int64, workerID uint) ([]float64, []int64) {
 		values, timestamps = removeNanValues(values[:0], timestamps[:0], tsSQ.Values, tsSQ.Timestamps)
 		preFunc(values, timestamps)
 		for _, rc := range rcs {
 			if tsm := newTimeseriesMap(funcName, keepMetricNames, sharedTimestamps, &tsSQ.MetricName); tsm != nil {
 				samplesScanned := rc.DoTimeseriesMap(tsm, values, timestamps)
 				atomic.AddUint64(&samplesScannedTotal, samplesScanned)
-				tssLock.Lock()
-				tss = tsm.AppendTimeseriesTo(tss)
-				tssLock.Unlock()
+				seriesByWorkerID[workerID].tss = tsm.AppendTimeseriesTo(seriesByWorkerID[workerID].tss)
 				continue
 			}
 			var ts timeseries
 			samplesScanned := doRollupForTimeseries(funcName, keepMetricNames, rc, &ts, &tsSQ.MetricName, values, timestamps, sharedTimestamps)
 			atomic.AddUint64(&samplesScannedTotal, samplesScanned)
-			tssLock.Lock()
-			tss = append(tss, &ts)
-			tssLock.Unlock()
+			seriesByWorkerID[workerID].tss = append(seriesByWorkerID[workerID].tss, &ts)
 		}
 		return values, timestamps
 	})
+	tss := make([]*timeseries, 0, len(tssSQ)*len(rcs))
+	for i := range seriesByWorkerID {
+		tss = append(tss, seriesByWorkerID[i].tss...)
+	}
+	putTimeseriesByWorkerID(tsw)
+
 	rowsScannedPerQuery.Update(float64(samplesScannedTotal))
 	qt.Printf("rollup %s() over %d series returned by subquery: series=%d, samplesScanned=%d", funcName, len(tssSQ), len(tss), samplesScannedTotal)
 	return tss, nil
@@ -941,28 +942,36 @@ func getKeepMetricNames(expr metricsql.Expr) bool {
 	return false
 }
 
-func doParallel(tss []*timeseries, f func(ts *timeseries, values []float64, timestamps []int64) ([]float64, []int64)) {
-	concurrency := cgroup.AvailableCPUs()
-	if concurrency > len(tss) {
-		concurrency = len(tss)
+func doParallel(tss []*timeseries, f func(ts *timeseries, values []float64, timestamps []int64, workerID uint) ([]float64, []int64)) {
+	workers := netstorage.MaxWorkers()
+	if workers > len(tss) {
+		workers = len(tss)
 	}
-	workCh := make(chan *timeseries, concurrency)
+	seriesPerWorker := (len(tss) + workers - 1) / workers
+	workChs := make([]chan *timeseries, workers)
+	for i := range workChs {
+		workChs[i] = make(chan *timeseries, seriesPerWorker)
+	}
+	for i, ts := range tss {
+		idx := i % len(workChs)
+		workChs[idx] <- ts
+	}
+	for _, workCh := range workChs {
+		close(workCh)
+	}
+
 	var wg sync.WaitGroup
-	wg.Add(concurrency)
-	for i := 0; i < concurrency; i++ {
-		go func() {
+	wg.Add(workers)
+	for i := 0; i < workers; i++ {
+		go func(workerID uint) {
 			defer wg.Done()
 			var tmpValues []float64
 			var tmpTimestamps []int64
-			for ts := range workCh {
-				tmpValues, tmpTimestamps = f(ts, tmpValues, tmpTimestamps)
+			for ts := range workChs[workerID] {
+				tmpValues, tmpTimestamps = f(ts, tmpValues, tmpTimestamps, workerID)
 			}
-		}()
+		}(uint(i))
 	}
-	for _, ts := range tss {
-		workCh <- ts
-	}
-	close(workCh)
 	wg.Wait()
 }
 
@@ -1041,6 +1050,9 @@ func evalRollupFuncWithMetricExpr(qt *querytracer.Tracer, ec *EvalConfig, funcNa
 	} else {
 		minTimestamp -= ec.Step
 	}
+	if minTimestamp < 0 {
+		minTimestamp = 0
+	}
 	sq := storage.NewSearchQuery(minTimestamp, ec.End, tfss, ec.MaxSeries)
 	rss, err := netstorage.ProcessSearchQuery(qt, sq, ec.Deadline)
 	if err != nil {
@@ -1177,9 +1189,11 @@ func evalRollupNoIncrementalAggregate(qt *querytracer.Tracer, funcName string, k
 	preFunc func(values []float64, timestamps []int64), sharedTimestamps []int64) ([]*timeseries, error) {
 	qt = qt.NewChild("rollup %s() over %d series; rollupConfigs=%s", funcName, rss.Len(), rcs)
 	defer qt.Done()
-	tss := make([]*timeseries, 0, rss.Len()*len(rcs))
-	var tssLock sync.Mutex
+
 	var samplesScannedTotal uint64
+	tsw := getTimeseriesByWorkerID()
+	seriesByWorkerID := tsw.byWorkerID
+	seriesLen := rss.Len()
 	err := rss.RunParallel(qt, func(rs *netstorage.Result, workerID uint) error {
 		rs.Values, rs.Timestamps = dropStaleNaNs(funcName, rs.Values, rs.Timestamps)
 		preFunc(rs.Values, rs.Timestamps)
@@ -1187,23 +1201,25 @@ func evalRollupNoIncrementalAggregate(qt *querytracer.Tracer, funcName string, k
 			if tsm := newTimeseriesMap(funcName, keepMetricNames, sharedTimestamps, &rs.MetricName); tsm != nil {
 				samplesScanned := rc.DoTimeseriesMap(tsm, rs.Values, rs.Timestamps)
 				atomic.AddUint64(&samplesScannedTotal, samplesScanned)
-				tssLock.Lock()
-				tss = tsm.AppendTimeseriesTo(tss)
-				tssLock.Unlock()
+				seriesByWorkerID[workerID].tss = tsm.AppendTimeseriesTo(seriesByWorkerID[workerID].tss)
 				continue
 			}
 			var ts timeseries
 			samplesScanned := doRollupForTimeseries(funcName, keepMetricNames, rc, &ts, &rs.MetricName, rs.Values, rs.Timestamps, sharedTimestamps)
 			atomic.AddUint64(&samplesScannedTotal, samplesScanned)
-			tssLock.Lock()
-			tss = append(tss, &ts)
-			tssLock.Unlock()
+			seriesByWorkerID[workerID].tss = append(seriesByWorkerID[workerID].tss, &ts)
 		}
 		return nil
 	})
 	if err != nil {
 		return nil, err
 	}
+	tss := make([]*timeseries, 0, seriesLen*len(rcs))
+	for i := range seriesByWorkerID {
+		tss = append(tss, seriesByWorkerID[i].tss...)
+	}
+	putTimeseriesByWorkerID(tsw)
+
 	rowsScannedPerQuery.Update(float64(samplesScannedTotal))
 	qt.Printf("samplesScanned=%d", samplesScannedTotal)
 	return tss, nil
@@ -1225,6 +1241,42 @@ func doRollupForTimeseries(funcName string, keepMetricNames bool, rc *rollupConf
 	return samplesScanned
 }
 
+type timeseriesWithPadding struct {
+	tss []*timeseries
+
+	// The padding prevents false sharing on widespread platforms with
+	// 128 mod (cache line size) = 0 .
+	_ [128 - unsafe.Sizeof([]*timeseries{})%128]byte
+}
+
+type timeseriesByWorkerID struct {
+	byWorkerID []timeseriesWithPadding
+}
+
+func (tsw *timeseriesByWorkerID) reset() {
+	byWorkerID := tsw.byWorkerID
+	for i := range byWorkerID {
+		byWorkerID[i].tss = nil
+	}
+}
+
+func getTimeseriesByWorkerID() *timeseriesByWorkerID {
+	v := timeseriesByWorkerIDPool.Get()
+	if v == nil {
+		return &timeseriesByWorkerID{
+			byWorkerID: make([]timeseriesWithPadding, netstorage.MaxWorkers()),
+		}
+	}
+	return v.(*timeseriesByWorkerID)
+}
+
+func putTimeseriesByWorkerID(tsw *timeseriesByWorkerID) {
+	tsw.reset()
+	timeseriesByWorkerIDPool.Put(tsw)
+}
+
+var timeseriesByWorkerIDPool sync.Pool
+
 var bbPool bytesutil.ByteBufferPool
 
 func evalNumber(ec *EvalConfig, n float64) []*timeseries {

app/vmselect/promql/exec_test.go

@@ -6047,7 +6047,7 @@ func TestExecSuccess(t *testing.T) {
 	})
 	t.Run(`bottomk(1)`, func(t *testing.T) {
 		t.Parallel()
-		q := `bottomk(1, label_set(10, "foo", "bar") or label_set(time()/150, "baz", "sss"))`
+		q := `bottomk(1, label_set(10, "foo", "bar") or label_set(time()/150, "baz", "sss") or label_set(time()<100, "a", "b"))`
 		r1 := netstorage.Result{
 			MetricName: metricNameExpected,
 			Values:     []float64{nan, nan, nan, 10, 10, 10},
@@ -6122,7 +6122,7 @@ func TestExecSuccess(t *testing.T) {
 		q := `interpolate(time() < 1300)`
 		r1 := netstorage.Result{
 			MetricName: metricNameExpected,
-			Values:     []float64{1000, 1200, 1200, 1200, 1200, 1200},
+			Values:     []float64{1000, 1200, nan, nan, nan, nan},
 			Timestamps: timestampsExpected,
 		}
 		resultExpected := []netstorage.Result{r1}
@@ -6133,7 +6133,18 @@ func TestExecSuccess(t *testing.T) {
 		q := `interpolate(time() > 1500)`
 		r1 := netstorage.Result{
 			MetricName: metricNameExpected,
-			Values:     []float64{1600, 1600, 1600, 1600, 1800, 2000},
+			Values:     []float64{nan, nan, nan, 1600, 1800, 2000},
+			Timestamps: timestampsExpected,
+		}
+		resultExpected := []netstorage.Result{r1}
+		f(q, resultExpected)
+	})
+	t.Run(`interpolate(tail_head_and_middle)`, func(t *testing.T) {
+		t.Parallel()
+		q := `interpolate(time() > 1100 and time() < 1300 default time() > 1700 and time() < 1900)`
+		r1 := netstorage.Result{
+			MetricName: metricNameExpected,
+			Values:     []float64{nan, 1200, 1400, 1600, 1800, nan},
 			Timestamps: timestampsExpected,
 		}
 		resultExpected := []netstorage.Result{r1}

app/vmselect/promql/rollup.go

@@ -863,11 +863,11 @@ func newRollupHoltWinters(args []interface{}) (rollupFunc, error) {
 			return rfa.prevValue
 		}
 		sf := sfs[rfa.idx]
-		if sf <= 0 || sf >= 1 {
+		if sf < 0 || sf > 1 {
 			return nan
 		}
 		tf := tfs[rfa.idx]
-		if tf <= 0 || tf >= 1 {
+		if tf < 0 || tf > 1 {
 			return nan
 		}
 

app/vmselect/promql/rollup_result_cache.go

@@ -441,7 +441,7 @@ func mustSaveRollupResultCacheKeyPrefix(path string) {
 var tooBigRollupResults = metrics.NewCounter("vm_too_big_rollup_results_total")
 
 // Increment this value every time the format of the cache changes.
-const rollupResultCacheVersion = 8
+const rollupResultCacheVersion = 9
 
 func marshalRollupResultCacheKey(dst []byte, expr metricsql.Expr, window, step int64, etfs [][]storage.TagFilter) []byte {
 	dst = append(dst, rollupResultCacheVersion)

app/vmselect/promql/rollup_test.go

@@ -419,12 +419,12 @@ func TestRollupHoltWinters(t *testing.T) {
 	}
 
 	f(-1, 0.5, nan)
-	f(0, 0.5, nan)
-	f(1, 0.5, nan)
+	f(0, 0.5, -856)
+	f(1, 0.5, 34)
 	f(2, 0.5, nan)
 	f(0.5, -1, nan)
-	f(0.5, 0, nan)
-	f(0.5, 1, nan)
+	f(0.5, 0, -54.1474609375)
+	f(0.5, 1, 25.25)
 	f(0.5, 2, nan)
 	f(0.5, 0.5, 34.97794532775879)
 	f(0.1, 0.5, -131.30529492371622)

app/vmselect/promql/timeseries.go

@@ -82,15 +82,17 @@ func marshalTimeseriesFast(dst []byte, tss []*timeseries, maxSize int, step int6
 		logger.Panicf("BUG: tss cannot be empty")
 	}
 
-	// Calculate the required size for marshaled tss.
-	size := 0
-	for _, ts := range tss {
-		size += ts.marshaledFastSizeNoTimestamps()
-	}
-	// timestamps are stored only once for all the tss, since they are identical.
+	// timestamps are stored only once for all the tss, since they must be identical
 	assertIdenticalTimestamps(tss, step)
-	size += 8 * len(tss[0].Timestamps)
+	timestamps := tss[0].Timestamps
 
+	// Calculate the required size for marshaled tss.
+	size := 8 + 8                          // 8 bytes for len(tss) and 8 bytes for len(timestamps)
+	size += 8 * len(timestamps)            // encoded timestamps
+	size += 8 * len(tss) * len(timestamps) // encoded values
+	for _, ts := range tss {
+		size += marshaledFastMetricNameSize(&ts.MetricName)
+	}
 	if size > maxSize {
 		// Do not marshal tss, since it would occupy too much space
 		return dst
@@ -98,176 +100,133 @@ func marshalTimeseriesFast(dst []byte, tss []*timeseries, maxSize int, step int6
 
 	// Allocate the buffer for the marshaled tss before its' marshaling.
 	// This should reduce memory fragmentation and memory usage.
-	dst = bytesutil.ResizeNoCopyMayOverallocate(dst, size)
-	dst = marshalFastTimestamps(dst[:0], tss[0].Timestamps)
+	dstLen := len(dst)
+	dst = bytesutil.ResizeWithCopyMayOverallocate(dst, size+dstLen)
+	dst = dst[:dstLen]
+
+	// Marshal timestamps and values at first, so they are 8-byte aligned.
+	// This prevents from SIGBUS error on arm architectures.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927
+	dst = encoding.MarshalUint64(dst, uint64(len(tss)))
+	dst = encoding.MarshalUint64(dst, uint64(len(timestamps)))
+	dst = marshalTimestampsFast(dst, timestamps)
 	for _, ts := range tss {
-		dst = ts.marshalFastNoTimestamps(dst)
+		dst = marshalValuesFast(dst, ts.Values)
+	}
+	for _, ts := range tss {
+		dst = marshalMetricNameFast(dst, &ts.MetricName)
 	}
 	return dst
 }
 
 // unmarshalTimeseriesFast unmarshals timeseries from src.
 //
-// The returned timeseries refer to src, so it is unsafe to modify it
-// until timeseries are in use.
+// The returned timeseries refer to src, so it is unsafe to modify it while timeseries are in use.
 func unmarshalTimeseriesFast(src []byte) ([]*timeseries, error) {
-	tail, timestamps, err := unmarshalFastTimestamps(src)
+	if len(src) < 16 {
+		return nil, fmt.Errorf("cannot unmarshal timeseries from %d bytes; need at least 16 bytes", len(src))
+	}
+	tssLen := encoding.UnmarshalUint64(src)
+	timestampsLen := encoding.UnmarshalUint64(src[8:])
+	src = src[16:]
+
+	// Unmarshal timestamps
+	tail, timestamps, err := unmarshalTimestampsFast(src, timestampsLen)
 	if err != nil {
 		return nil, err
 	}
 	src = tail
 
-	var tss []*timeseries
-	for len(src) > 0 {
+	tss := make([]*timeseries, tssLen)
+	for i := range tss {
 		var ts timeseries
-		ts.denyReuse = false
+		ts.denyReuse = true
 		ts.Timestamps = timestamps
+		tss[i] = &ts
+	}
 
-		tail, err := ts.unmarshalFastNoTimestamps(src)
+	// Unmarshal values
+	for _, ts := range tss {
+		tail, values, err := unmarshalValuesFast(src, timestampsLen)
+		if err != nil {
+			return nil, err
+		}
+		ts.Values = values
+		src = tail
+	}
+
+	// Unmarshal metric names for the time series
+	for _, ts := range tss {
+		tail, err := unmarshalMetricNameFast(&ts.MetricName, src)
 		if err != nil {
 			return nil, err
 		}
 		src = tail
+	}
 
-		tss = append(tss, &ts)
+	if len(src) > 0 {
+		return nil, fmt.Errorf("unexpected non-empty tail left after unmarshaling %d timeseries; len(tail)=%d", len(tss), len(src))
 	}
 	return tss, nil
 }
 
-// marshaledFastSizeNoTimestamps returns the size of marshaled ts
-// returned from marshalFastNoTimestamps.
-func (ts *timeseries) marshaledFastSizeNoTimestamps() int {
-	mn := &ts.MetricName
-	n := 2 + len(mn.MetricGroup)
+// marshaledFastMetricNameSize returns the size of marshaled mn returned from marshalMetricNameFast.
+func marshaledFastMetricNameSize(mn *storage.MetricName) int {
+	n := 0
+	n += 2 + len(mn.MetricGroup)
 	n += 2 // Length of tags.
 	for i := range mn.Tags {
 		tag := &mn.Tags[i]
 		n += 2 + len(tag.Key)
 		n += 2 + len(tag.Value)
 	}
-	n += 8 * len(ts.Values)
 	return n
 }
 
-// marshalFastNoTimestamps appends marshaled ts to dst and returns the result.
-//
-// It doesn't marshal timestamps.
-//
-// The result must be unmarshaled with unmarshalFastNoTimestamps.
-func (ts *timeseries) marshalFastNoTimestamps(dst []byte) []byte {
-	mn := &ts.MetricName
-	dst = marshalBytesFast(dst, mn.MetricGroup)
-	dst = encoding.MarshalUint16(dst, uint16(len(mn.Tags)))
-	// There is no need in tags' sorting - they must be sorted after unmarshaling.
-	for i := range mn.Tags {
-		tag := &mn.Tags[i]
-		dst = marshalBytesFast(dst, tag.Key)
-		dst = marshalBytesFast(dst, tag.Value)
-	}
-
-	// Do not marshal len(ts.Values), since it is already encoded as len(ts.Timestamps)
-	// during marshalFastTimestamps.
-	var valuesBuf []byte
-	if len(ts.Values) > 0 {
-		valuesBuf = float64ToByteSlice(ts.Values)
-	}
+func marshalValuesFast(dst []byte, values []float64) []byte {
+	// Do not marshal len(values), since it is already encoded as len(timestamps) at marshalTimestampsFast.
+	valuesBuf := float64ToByteSlice(values)
 	dst = append(dst, valuesBuf...)
 	return dst
 }
 
-func marshalFastTimestamps(dst []byte, timestamps []int64) []byte {
-	dst = encoding.MarshalUint32(dst, uint32(len(timestamps)))
-	var timestampsBuf []byte
-	if len(timestamps) > 0 {
-		timestampsBuf = int64ToByteSlice(timestamps)
+// it is unsafe modifying src while the returned values is in use.
+func unmarshalValuesFast(src []byte, valuesLen uint64) ([]byte, []float64, error) {
+	bufSize := valuesLen * 8
+	if uint64(len(src)) < bufSize {
+		return src, nil, fmt.Errorf("cannot unmarshal values; got %d ytes; want at least %d bytes", uint64(len(src)), bufSize)
 	}
+	values := byteSliceToFloat64(src[:bufSize])
+	return src[bufSize:], values, nil
+}
+
+func marshalTimestampsFast(dst []byte, timestamps []int64) []byte {
+	timestampsBuf := int64ToByteSlice(timestamps)
 	dst = append(dst, timestampsBuf...)
 	return dst
 }
 
 // it is unsafe modifying src while the returned timestamps is in use.
-func unmarshalFastTimestamps(src []byte) ([]byte, []int64, error) {
-	if len(src) < 4 {
-		return src, nil, fmt.Errorf("cannot decode len(timestamps); got %d bytes; want at least %d bytes", len(src), 4)
-	}
-	timestampsCount := int(encoding.UnmarshalUint32(src))
-	src = src[4:]
-	if timestampsCount == 0 {
-		return src, nil, nil
-	}
-
-	bufSize := timestampsCount * 8
-	if len(src) < bufSize {
+func unmarshalTimestampsFast(src []byte, timestampsLen uint64) ([]byte, []int64, error) {
+	bufSize := timestampsLen * 8
+	if uint64(len(src)) < bufSize {
 		return src, nil, fmt.Errorf("cannot unmarshal timestamps; got %d bytes; want at least %d bytes", len(src), bufSize)
 	}
 	timestamps := byteSliceToInt64(src[:bufSize])
-	src = src[bufSize:]
-
-	return src, timestamps, nil
+	return src[bufSize:], timestamps, nil
 }
 
-// unmarshalFastNoTimestamps unmarshals ts from src, so ts members reference src.
+// marshalMetricNameFast appends marshaled mn to dst and returns the result.
 //
-// It is expected that ts.Timestamps is already unmarshaled.
-//
-// It is unsafe to modify src while ts is in use.
-func (ts *timeseries) unmarshalFastNoTimestamps(src []byte) ([]byte, error) {
-	// ts members point to src, so they cannot be re-used.
-	ts.denyReuse = true
-
-	tail, err := unmarshalMetricNameFast(&ts.MetricName, src)
-	if err != nil {
-		return tail, fmt.Errorf("cannot unmarshal MetricName: %w", err)
-	}
-	src = tail
-
-	valuesCount := len(ts.Timestamps)
-	if valuesCount == 0 {
-		return src, nil
-	}
-	bufSize := valuesCount * 8
-	if len(src) < bufSize {
-		return src, fmt.Errorf("cannot unmarshal values; got %d bytes; want at least %d bytes", len(src), bufSize)
-	}
-	ts.Values = byteSliceToFloat64(src[:bufSize])
-
-	return src[bufSize:], nil
+// The result must be unmarshaled with unmarshalMetricNameFast.
+func marshalMetricNameFast(dst []byte, mn *storage.MetricName) []byte {
+	dst = marshalBytesFast(dst, mn.MetricGroup)
+	dst = encoding.MarshalUint16(dst, uint16(len(mn.Tags)))
+	// There is no need in tags' sorting - they must be sorted after unmarshaling.
+	return marshalMetricTagsFast(dst, mn.Tags)
 }
 
-func float64ToByteSlice(a []float64) (b []byte) {
-	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
-	sh.Data = uintptr(unsafe.Pointer(&a[0]))
-	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
-	sh.Cap = sh.Len
-	return
-}
-
-func int64ToByteSlice(a []int64) (b []byte) {
-	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
-	sh.Data = uintptr(unsafe.Pointer(&a[0]))
-	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
-	sh.Cap = sh.Len
-	return
-}
-
-func byteSliceToInt64(b []byte) (a []int64) {
-	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
-	sh.Data = uintptr(unsafe.Pointer(&b[0]))
-	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
-	sh.Cap = sh.Len
-	return
-}
-
-func byteSliceToFloat64(b []byte) (a []float64) {
-	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
-	sh.Data = uintptr(unsafe.Pointer(&b[0]))
-	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
-	sh.Cap = sh.Len
-	return
-}
-
-// unmarshalMetricNameFast unmarshals mn from src, so mn members
-// hold references to src.
+// unmarshalMetricNameFast unmarshals mn from src, so mn members hold references to src.
 //
 // It is unsafe modifying src while mn is in use.
 func unmarshalMetricNameFast(mn *storage.MetricName, src []byte) ([]byte, error) {
@@ -320,9 +279,7 @@ func marshalMetricTagsFast(dst []byte, tags []storage.Tag) []byte {
 
 func marshalMetricNameSorted(dst []byte, mn *storage.MetricName) []byte {
 	dst = marshalBytesFast(dst, mn.MetricGroup)
-	sortMetricTags(mn)
-	dst = marshalMetricTagsFast(dst, mn.Tags)
-	return dst
+	return marshalMetricTagsSorted(dst, mn)
 }
 
 func marshalMetricTagsSorted(dst []byte, mn *storage.MetricName) []byte {
@@ -348,6 +305,62 @@ func unmarshalBytesFast(src []byte) ([]byte, []byte, error) {
 	return src[n:], src[:n], nil
 }
 
+func float64ToByteSlice(a []float64) (b []byte) {
+	if len(a) == 0 {
+		return nil
+	}
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func int64ToByteSlice(a []int64) (b []byte) {
+	if len(a) == 0 {
+		return nil
+	}
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = uintptr(unsafe.Pointer(&a[0]))
+	sh.Len = len(a) * int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	return
+}
+
+func byteSliceToInt64(b []byte) (a []int64) {
+	if len(b) == 0 {
+		return nil
+	}
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
+	sh.Data = uintptr(unsafe.Pointer(&b[0]))
+	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	// Make sure that the returned slice is properly aligned to 8 bytes.
+	// This prevents from SIGBUS error on arm architectures, which deny unaligned access.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927
+	if sh.Data%8 != 0 {
+		logger.Panicf("BUG: the input byte slice b must be aligned to 8 bytes")
+	}
+	return
+}
+
+func byteSliceToFloat64(b []byte) (a []float64) {
+	if len(b) == 0 {
+		return nil
+	}
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&a))
+	sh.Data = uintptr(unsafe.Pointer(&b[0]))
+	sh.Len = len(b) / int(unsafe.Sizeof(a[0]))
+	sh.Cap = sh.Len
+	// Make sure that the returned slice is properly aligned to 8 bytes.
+	// This prevents from SIGBUS error on arm architectures, which deny unaligned access.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927
+	if sh.Data%8 != 0 {
+		logger.Panicf("BUG: the input byte slice b must be aligned to 8 bytes")
+	}
+	return
+}
+
 func stringMetricName(mn *storage.MetricName) string {
 	var dst []byte
 	dst = append(dst, mn.MetricGroup...)

app/vmselect/promql/timeseries_test.go

@@ -1,10 +1,10 @@
 package promql
 
 import (
-	"fmt"
 	"os"
 	"reflect"
 	"testing"
+	"unsafe"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
 )
@@ -14,91 +14,98 @@ func TestMain(m *testing.M) {
 	os.Exit(n)
 }
 
-func TestTimeseriesMarshalUnmarshalFast(t *testing.T) {
-	t.Run("single", func(t *testing.T) {
-		var tsOrig timeseries
-		buf := tsOrig.marshalFastNoTimestamps(nil)
-		n := tsOrig.marshaledFastSizeNoTimestamps()
-		if n != len(buf) {
-			t.Fatalf("unexpected marshaled size; got %d; want %d", n, len(buf))
-		}
-
-		var tsGot timeseries
-		tail, err := tsGot.unmarshalFastNoTimestamps(buf)
+func TestMarshalTimeseriesFast(t *testing.T) {
+	f := func(tss []*timeseries) {
+		t.Helper()
+		data := marshalTimeseriesFast(nil, tss, 1e9, 10)
+		tss2, err := unmarshalTimeseriesFast(data)
 		if err != nil {
 			t.Fatalf("cannot unmarshal timeseries: %s", err)
 		}
-		if len(tail) > 0 {
-			t.Fatalf("unexpected non-empty tail left: len(tail)=%d; tail=%X", len(tail), tail)
-		}
-		tsOrig.denyReuse = true
-		tsOrig.MetricName.MetricGroup = []byte{}
-		if !reflect.DeepEqual(&tsOrig, &tsGot) {
-			t.Fatalf("unexpected ts\ngot:\n%s\nwant:\n%s", &tsGot, &tsOrig)
-		}
-	})
-	t.Run("multiple", func(t *testing.T) {
-		var dst []byte
-		var tssOrig []*timeseries
-		timestamps := []int64{2}
-		for i := 0; i < 10; i++ {
-			var ts timeseries
-			ts.denyReuse = true
-			ts.MetricName.MetricGroup = []byte(fmt.Sprintf("metricGroup %d", i))
-			ts.MetricName.Tags = []storage.Tag{{
-				Key:   []byte(fmt.Sprintf("key %d", i)),
-				Value: []byte(fmt.Sprintf("value %d", i)),
-			}}
-			ts.Values = []float64{float64(i) + 0.2}
-			ts.Timestamps = timestamps
-
-			dstLen := len(dst)
-			dst = ts.marshalFastNoTimestamps(dst)
-			n := ts.marshaledFastSizeNoTimestamps()
-			if n != len(dst)-dstLen {
-				t.Fatalf("unexpected marshaled size on iteration %d; got %d; want %d", i, n, len(dst)-dstLen)
-			}
-
-			var tsGot timeseries
-			tsGot.Timestamps = ts.Timestamps
-			tail, err := tsGot.unmarshalFastNoTimestamps(dst[dstLen:])
-			if err != nil {
-				t.Fatalf("cannot unmarshal timeseries on iteration %d: %s", i, err)
-			}
-			if len(tail) > 0 {
-				t.Fatalf("unexpected non-empty tail left on iteration %d: len(tail)=%d; tail=%x", i, len(tail), tail)
-			}
-			if !reflect.DeepEqual(&ts, &tsGot) {
-				t.Fatalf("unexpected ts on iteration %d\ngot:\n%s\nwant:\n%s", i, &tsGot, &ts)
-			}
-
-			tssOrig = append(tssOrig, &ts)
-		}
-		buf := marshalTimeseriesFast(nil, tssOrig, 1e6, 123)
-		tssGot, err := unmarshalTimeseriesFast(buf)
-		if err != nil {
-			t.Fatalf("error in unmarshalTimeseriesFast: %s", err)
-		}
-		if !reflect.DeepEqual(tssOrig, tssGot) {
-			t.Fatalf("unexpected unmarshaled timeseries\ngot:\n%s\nwant:\n%s", tssGot, tssOrig)
+		if !reflect.DeepEqual(tss, tss2) {
+			t.Fatalf("unexpected timeseries unmarshaled\ngot\n%#v\nwant\n%#v", tss2[0], tss[0])
 		}
 
-		src := dst
-		for i := 0; i < 10; i++ {
-			tsOrig := tssOrig[i]
-			var ts timeseries
-			ts.Timestamps = tsOrig.Timestamps
-			tail, err := ts.unmarshalFastNoTimestamps(src)
-			if err != nil {
-				t.Fatalf("cannot unmarshal timeseries[%d]: %s", i, err)
+		// Check 8-byte alignment.
+		// This prevents from SIGBUS error on arm architectures.
+		// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927
+		for _, ts := range tss2 {
+			if len(ts.Values) == 0 {
+				continue
 			}
-			src = tail
-			if !reflect.DeepEqual(tsOrig, &ts) {
-				t.Fatalf("unexpected ts on iteration %d:\n%+v\nwant:\n%+v", i, &ts, tsOrig)
+
+			// check float64 alignment
+			addr := uintptr(unsafe.Pointer(&ts.Values[0]))
+			if mod := addr % unsafe.Alignof(ts.Values[0]); mod != 0 {
+				t.Fatalf("mis-aligned; &ts.Values[0]=%p; mod=%d", &ts.Values[0], mod)
+			}
+			// check int64 alignment
+			addr = uintptr(unsafe.Pointer(&ts.Timestamps[0]))
+			if mod := addr % unsafe.Alignof(ts.Timestamps[0]); mod != 0 {
+				t.Fatalf("mis-aligned; &ts.Timestamps[0]=%p; mod=%d", &ts.Timestamps[0], mod)
 			}
 		}
-		if len(src) > 0 {
-			t.Fatalf("unexpected tail left; len(tail)=%d; tail=%X", len(src), src)
-		}
+	}
+
+	// Single series
+	f([]*timeseries{{
+		MetricName: storage.MetricName{
+			MetricGroup: []byte{},
+		},
+		denyReuse: true,
+	}})
+	f([]*timeseries{{
+		MetricName: storage.MetricName{
+			MetricGroup: []byte("foobar"),
+			Tags: []storage.Tag{
+				{
+					Key:   []byte("tag1"),
+					Value: []byte("value1"),
+				},
+				{
+					Key:   []byte("tag2"),
+					Value: []byte("value2"),
+				},
+			},
+		},
+		Values:     []float64{1, 2, 3.234},
+		Timestamps: []int64{10, 20, 30},
+		denyReuse:  true,
+	}})
+
+	// Multiple series
+	f([]*timeseries{
+		{
+			MetricName: storage.MetricName{
+				MetricGroup: []byte("foobar"),
+				Tags: []storage.Tag{
+					{
+						Key:   []byte("tag1"),
+						Value: []byte("value1"),
+					},
+					{
+						Key:   []byte("tag2"),
+						Value: []byte("value2"),
+					},
+				},
+			},
+			Values:     []float64{1, 2.34, -33},
+			Timestamps: []int64{-10, 0, 10},
+			denyReuse:  true,
+		},
+		{
+			MetricName: storage.MetricName{
+				MetricGroup: []byte("baz"),
+				Tags: []storage.Tag{
+					{
+						Key:   []byte("tag12"),
+						Value: []byte("value13"),
+					},
+				},
+			},
+			Values:     []float64{4, 1, 2.34},
+			Timestamps: []int64{-10, 0, 10},
+			denyReuse:  true,
+		},
 	})
 }

app/vmselect/promql/transform.go

@@ -552,18 +552,28 @@ func vmrangeBucketsToLE(tss []*timeseries) []*timeseries {
 		for _, xs := range xss {
 			ts := xs.ts
 			if isZeroTS(ts) {
-				// Skip time series with zeros. They are substituted by xssNew below.
-				xsPrev = xs
+				// Skip buckets with zero values - they will be merged into a single bucket
+				// when the next non-zero bucket appears.
+
+				// Do not store xs in xsPrev in order to properly create `le` time series
+				// for zero buckets.
+				// See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4021
 				continue
 			}
-			if xs.start != xsPrev.end && uniqTs[xs.startStr] == nil {
-				uniqTs[xs.startStr] = xs.ts
-				xssNew = append(xssNew, x{
-					endStr: xs.startStr,
-					end:    xs.start,
-					ts:     copyTS(ts, xs.startStr),
-				})
+			if xs.start != xsPrev.end {
+				// There is a gap between the previous bucket and the current bucket
+				// or the previous bucket is skipped because it was zero.
+				// Fill it with a time series with le=xs.start.
+				if uniqTs[xs.startStr] == nil {
+					uniqTs[xs.startStr] = xs.ts
+					xssNew = append(xssNew, x{
+						endStr: xs.startStr,
+						end:    xs.start,
+						ts:     copyTS(ts, xs.startStr),
+					})
+				}
 			}
+			// Convert the current time series to a time series with le=xs.end
 			ts.MetricName.AddTag("le", xs.endStr)
 			prevTs := uniqTs[xs.endStr]
 			if prevTs != nil {
@@ -575,7 +585,7 @@ func vmrangeBucketsToLE(tss []*timeseries) []*timeseries {
 			}
 			xsPrev = xs
 		}
-		if !math.IsInf(xsPrev.end, 1) && !isZeroTS(xsPrev.ts) {
+		if xsPrev.ts != nil && !math.IsInf(xsPrev.end, 1) && !isZeroTS(xsPrev.ts) {
 			xssNew = append(xssNew, x{
 				endStr: "+Inf",
 				end:    math.Inf(1),
@@ -1165,7 +1175,8 @@ func transformInterpolate(tfa *transformFuncArg) ([]*timeseries, error) {
 	}
 	rvs := args[0]
 	for _, ts := range rvs {
-		values := ts.Values
+		values := skipLeadingNaNs(ts.Values)
+		values = skipTrailingNaNs(values)
 		if len(values) == 0 {
 			continue
 		}

app/vmselect/promql/transform_test.go

@@ -78,6 +78,36 @@ foo{le="+Inf"} 1.23 456`,
 foo{le="+Inf"} 5.3 0`,
 	)
 
+	// Adjacent empty vmrange bucket
+	f(
+		`foo{vmrange="7.743e+05...8.799e+05"} 5 123
+foo{vmrange="6.813e+05...7.743e+05"} 0 123`,
+		`foo{le="7.743e+05"} 0 123
+foo{le="8.799e+05"} 5 123
+foo{le="+Inf"} 5 123`,
+	)
+
+	// Multiple adjacent empty vmrange bucket
+	f(
+		`foo{vmrange="7.743e+05...8.799e+05"} 5 123
+foo{vmrange="6.813e+05...7.743e+05"} 0 123
+foo{vmrange="5.813e+05...6.813e+05"} 0 123
+`,
+		`foo{le="7.743e+05"} 0 123
+foo{le="8.799e+05"} 5 123
+foo{le="+Inf"} 5 123`,
+	)
+	f(
+		`foo{vmrange="8.799e+05...9.813e+05"} 0 123
+foo{vmrange="7.743e+05...8.799e+05"} 5 123
+foo{vmrange="6.813e+05...7.743e+05"} 0 123
+foo{vmrange="5.813e+05...6.813e+05"} 0 123
+`,
+		`foo{le="7.743e+05"} 0 123
+foo{le="8.799e+05"} 5 123
+foo{le="+Inf"} 5 123`,
+	)
+
 	// Multiple non-empty vmrange buckets
 	f(
 		`foo{vmrange="4.084e+02...4.642e+02"} 2 123

app/vmstorage/main.go

@@ -37,8 +37,10 @@ var (
 	finalMergeDelay = flag.Duration("finalMergeDelay", 0, "The delay before starting final merge for per-month partition after no new data is ingested into it. "+
 		"Final merge may require additional disk IO and CPU resources. Final merge may increase query speed and reduce disk space usage in some cases. "+
 		"Zero value disables final merge")
-	bigMergeConcurrency     = flag.Int("bigMergeConcurrency", 0, "The maximum number of CPU cores to use for big merges. Default value is used if set to 0")
-	smallMergeConcurrency   = flag.Int("smallMergeConcurrency", 0, "The maximum number of CPU cores to use for small merges. Default value is used if set to 0")
+	_ = flag.Int("bigMergeConcurrency", 0, "Deprecated: this flag does nothing. Please use -smallMergeConcurrency "+
+		"for controlling the concurrency of background merges. See https://docs.victoriametrics.com/#storage")
+	smallMergeConcurrency = flag.Int("smallMergeConcurrency", 0, "The maximum number of workers for background merges. See https://docs.victoriametrics.com/#storage . "+
+		"It isn't recommended tuning this flag in general case, since this may lead to uncontrolled increase in the number of parts and increased CPU usage during queries")
 	retentionTimezoneOffset = flag.Duration("retentionTimezoneOffset", 0, "The offset for performing indexdb rotation. "+
 		"If set to 0, then the indexdb rotation is performed at 4am UTC time per each -retentionPeriod. "+
 		"If set to 2h, then the indexdb rotation is performed at 4am EET time (the timezone with +2h offset)")
@@ -91,7 +93,6 @@ func Init(resetCacheIfNeeded func(mrs []storage.MetricRow)) {
 	resetResponseCacheIfNeeded = resetCacheIfNeeded
 	storage.SetLogNewSeries(*logNewSeries)
 	storage.SetFinalMergeDelay(*finalMergeDelay)
-	storage.SetBigMergeWorkersCount(*bigMergeConcurrency)
 	storage.SetMergeWorkersCount(*smallMergeConcurrency)
 	storage.SetRetentionTimezoneOffset(*retentionTimezoneOffset)
 	storage.SetFreeDiskSpaceLimit(minFreeDiskSpaceBytes.N)

app/vmui/Dockerfile-build

@@ -1,4 +1,4 @@
-FROM node:18-alpine3.15
+FROM node:18-alpine3.17
 
 RUN apk update && apk upgrade
 RUN apk add --no-cache bash bash-doc bash-completion libtool autoconf automake nasm pkgconfig libpng gcc make g++ zlib-dev gawk

app/vmui/Dockerfile-web

@@ -1,4 +1,4 @@
-FROM golang:1.19.5 as build-web-stage
+FROM golang:1.21.6 as build-web-stage
 COPY build /build
 
 WORKDIR /build
@@ -6,7 +6,7 @@ COPY web/ /build/
 RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o web-amd64 github.com/VictoriMetrics/vmui/ && \
     GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build -o web-windows github.com/VictoriMetrics/vmui/
 
-FROM alpine:3.17.1
+FROM alpine:3.19.0
 USER root
 
 COPY --from=build-web-stage /build/web-amd64 /app/web

deployment/docker/Makefile

@@ -2,9 +2,10 @@
 
 DOCKER_NAMESPACE := victoriametrics
 
-ROOT_IMAGE ?= alpine:3.17.1
-CERTS_IMAGE := alpine:3.17.1
-GO_BUILDER_IMAGE := golang:1.20.0-alpine
+ROOT_IMAGE ?= alpine:3.19.0
+CERTS_IMAGE := alpine:3.19.0
+
+GO_BUILDER_IMAGE := golang:1.21.6-alpine
 BUILDER_IMAGE := local/builder:2.0.0-$(shell echo $(GO_BUILDER_IMAGE) | tr :/ __)-1
 BASE_IMAGE := local/base:1.1.4-$(shell echo $(ROOT_IMAGE) | tr :/ __)-$(shell echo $(CERTS_IMAGE) | tr :/ __)
 
@@ -16,9 +17,6 @@ package-base:
 			--tag $(BASE_IMAGE) \
 			deployment/docker/base
 
-docker-scan: package-base
-	docker scan --severity=medium --accept-license $(BASE_IMAGE) || (echo "❌ The build has been terminated because critical vulnerabilities were found in $(BASE_IMAGE)"; exit 1)
-
 package-builder:
 	(docker image ls --format '{{.Repository}}:{{.Tag}}' | grep -q '$(BUILDER_IMAGE)$$') \
 		|| docker build \
@@ -77,8 +75,8 @@ publish-via-docker: \
 		--build-arg root_image=$(ROOT_IMAGE) \
 		--build-arg APP_NAME=$(APP_NAME) \
 		--tag $(DOCKER_NAMESPACE)/$(APP_NAME):$(PKG_TAG)$(RACE) \
-		--tag $(DOCKER_NAMESPACE)/$(APP_NAME):$(LATEST_TAG)$(RACE) \
 		-o type=image \
+		--provenance=false \
 		-f app/$(APP_NAME)/multiarch/Dockerfile \
 		--push \
 		bin
@@ -102,7 +100,9 @@ app-via-docker-linux-amd64:
 	CGO_ENABLED=1 GOOS=linux GOARCH=amd64 $(MAKE) app-via-docker-goos-goarch
 
 app-via-docker-linux-arm:
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm $(MAKE) app-via-docker-goos-goarch
+	APP_SUFFIX='-linux-arm' \
+	DOCKER_OPTS='--env CGO_ENABLED=0 --env GOOS=linux --env GOARCH=arm --env GOARM=5' \
+	$(MAKE) app-via-docker
 
 app-via-docker-linux-arm64:
 ifeq ($(APP_NAME),vmagent)

deployment/docker/alerts-health.yml

@@ -34,12 +34,12 @@ groups:
           Consider to increase the limit as fast as possible."
 
       - alert: TooHighMemoryUsage
-        expr: (process_resident_memory_anon_bytes / vm_available_memory_bytes) > 0.9
+        expr: (process_resident_memory_anon_bytes / vm_available_memory_bytes) > 0.8
         for: 5m
         labels:
           severity: critical
         annotations:
-          summary: "It is more than 90% of memory used by \"{{ $labels.job }}\"(\"{{ $labels.instance }}\") during the last 5m"
+          summary: "It is more than 80% of memory used by \"{{ $labels.job }}\"(\"{{ $labels.instance }}\") during the last 5m"
           description: "Too high memory usage may result into multiple issues such as OOMs or degraded performance.
            Consider to either increase available memory or decrease the load on the process."
 

docs/CHANGELOG.md

@@ -13,7 +13,213 @@ The following tip changes can be tested by building VictoriaMetrics components f
 * [How to build vmauth](https://docs.victoriametrics.com/vmauth.html#how-to-build-from-sources)
 * [How to build vmctl](https://docs.victoriametrics.com/vmctl.html#how-to-build)
 
-## tip
+## v1.87.x long-time support release (LTS)
+
+## [v1.87.13](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.13)
+
+Released at 2024-01-17
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.21.5 to Go1.21.6. See [the list of issues addressed in Go1.21.6](https://github.com/golang/go/issues?q=milestone%3AGo1.21.6+label%3ACherryPickApproved).
+
+* BUGFIX: `vmstorage`: added missing `-inmemoryDataFlushInterval` command-line flag, which was missing in [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html) after implementing [this feature](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3337) in [v1.85.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.85.0).
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): properly handle queries, which wrap [rollup functions](https://docs.victoriametrics.com/MetricsQL.html#rollup-functions) with multiple arguments without explicitly specified lookbehind window in square brackets into [aggregate functions](https://docs.victoriametrics.com/MetricsQL.html#aggregate-functions). For example, `sum(quantile_over_time(0.5, process_resident_memory_bytes))` was resulting to `expecting at least 2 args to ...; got 1 args' error. Thanks to @atykhyy for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5414).
+* BUGFIX: `vmstorage`: properly expire `storage/prefetchedMetricIDs` cache. Previously this cache was never expired, so it could grow big under [high churn rate](https://docs.victoriametrics.com/FAQ.html#what-is-high-churn-rate). This could result in increasing CPU load over time.
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): properly return results from [bottomk](https://docs.victoriametrics.com/MetricsQL.html#bottomk) and `bottomk_...` functions when some of these results contain NaN values. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5506). Thanks to @xiaozongyang for [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5509).
+* BUGFIX: all: fix potential panic during components shutdown when [metrics push](https://docs.victoriametrics.com/#push-metrics) is configured. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5548). Thanks to @zhdd99 for the [pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5549).
+
+## [v1.87.12](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.12)
+
+Released at 2023-12-10
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade base docker image (Alpine) from 3.18.4 to 3.19.0. See [alpine 3.19.0 release notes](https://www.alpinelinux.org/posts/Alpine-3.19.0-released.html).
+* SECURITY: upgrade Go builder from Go1.21.4 to Go1.21.5. See [the list of issues addressed in Go1.21.5](https://github.com/golang/go/issues?q=milestone%3AGo1.21.5+label%3ACherryPickApproved).
+
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): sanitize label names before sending the alert notification to Alertmanager. Before, vmalert would send notifications with labels containing characters not supported by Alertmanager validator, resulting into validation errors like `msg="Failed to validate alerts" err="invalid label set: invalid name "foo.bar"`.
+* BUGFIX: properly escape `<` character in responses returned via [`/federate`](https://docs.victoriametrics.com/#federation) endpoint. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5431).
+
+## [v1.87.11](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.11)
+
+Released at 2023-11-14
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.21.3 to Go1.21.4. [the list of issues addressed in Go1.21.4](https://github.com/golang/go/issues?q=milestone%3AGo1.21.4+label%3ACherryPickApproved).
+
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly apply [relabeling](https://docs.victoriametrics.com/vmagent.html#relabeling) with `regex`, which start and end with `.+` or `.*` and which contain alternate sub-regexps. For example, `.+;|;.+` or `.*foo|bar|baz.*`. Previously such regexps were improperly parsed, which could result in undexpected relabeling results. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5297).
+* BUGFIX: fix panic, which could occur when [query tracing](https://docs.victoriametrics.com/#query-tracing) is enabled. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5319).
+* BUGFIX: [vmstorage](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): log warning about switching to ReadOnly mode only on state change. Before, vmstorage would log this warning every 1s. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5159) for details.
+
+## [v1.87.10](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.10)
+
+Released at 2023-10-16
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.21.1 to Go1.21.3. See [the list of issues addressed in Go1.21.2](https://github.com/golang/go/issues?q=milestone%3AGo1.21.2+label%3ACherryPickApproved) and [the list of issues addressed in Go1.21.3](https://github.com/golang/go/issues?q=milestone%3AGo1.21.3+label%3ACherryPickApproved).
+
+* BUGFIX: [storage](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html): prevent from livelock when [forced merge](https://docs.victoriametrics.com/#forced-merge) is called under high data ingestion. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4987).
+* BUGFIX: [Graphite Render API](https://docs.victoriametrics.com/#graphite-render-api-usage): correctly return `null` instead of `Inf` in JSON query responses. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3783).
+* BUGFIX: [vminsert](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): fix ingestion via [multitenant url](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#multitenancy-via-labels) for opentsdbhttp. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5061). The bug has been introduced in [v1.87.8](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.8).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): fix support of legacy DataDog agent, which adds trailing slashes to urls. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5078). Thanks to @maxb for spotting the issue.
+
+## [v1.87.9](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.9)
+
+Released at 2023-09-10
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.21.0 to Go1.21.1. See [the list of issues addressed in Go1.20.6](https://github.com/golang/go/issues?q=milestone%3AGo1.21.1+label%3ACherryPickApproved).
+
+* BUGFIX: [vminsert enterprise](https://docs.victoriametrics.com/enterprise.html): properly parse `/insert/multitenant/*` urls, which have been broken since [v1.93.2](#v1932). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4947).
+* BUGFIX: properly build production armv5 binaries for `GOARCH=arm`. This has been broken after the upgrading of Go builder to Go1.21.0. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4965).
+* BUGFIX: [vmselect](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): return `503 Service Unavailable` status code when [partial responses](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#cluster-availability) are denied and some of `vmstorage` nodes are temporarily unavailable. Previously `422 Unprocessable Entiry` status code was mistakenly returned in this case, which could prevent from automatic recovery by re-sending the request to healthy cluster replica in another availability zone.
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): fix the bug when Group's `params` fields with multiple values were overriding each other instead of adding up. The bug was introduced in [this commit](https://github.com/VictoriaMetrics/VictoriaMetrics/commit/eccecdf177115297fa1dc4d42d38e23de9a9f2cb) starting from [v1.87.7](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.7). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4908).
+
+## [v1.87.8](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.8)
+
+Released at 2023-09-01
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* BUGFIX: [build](https://docs.victoriametrics.com/): fix Docker builds for old Docker releases. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4907).
+* BUGFIX: vmselect: correctly handle requests with `/select/multitenant` prefix. Such requests must be rejected since vmselect does not support multitenancy endpoint. Previously, such requests were causing panic. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4910).
+* BUGFIX: [vminsert](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): properly check for [read-only state](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#readonly-mode) at `vmstorage`. Previously it wasn't properly checked, which could lead to increased resource usage and data ingestion slowdown when some of `vmstorage` nodes are in read-only mode. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4870).
+* BUGFIX: [vminsert](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): properly close broken vmstorage connection during [read-only state](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#readonly-mode) checks at `vmstorage`. Previously it wasn't properly closed, which prevents restoring `vmstorage` node from read-only mode. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4870).
+* BUGFIX: [vmstorage](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html):  prevent from breaking `vmselect` -> `vmstorage` RPC communication when `vmstorage` returns an empty label name at `/api/v1/labels` request. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4932).
+* BUGFIX: do not allow starting VictoriaMetrics components with improperly set boolean command-line flags in the form `-boolFlagName value`, since this leads to silent incomplete flags' parsing. This form should be replaced with `-boolFlagName=value`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4845).
+* BUGFIX: properly replace `:` chars in label names with `_` when `-usePromCompatibleNaming` command-line flag is passed to `vmagent`, `vminsert` or single-node VictoriaMetrics. This addresses [this comment](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3113#issuecomment-1275077071).
+* BUGFIX: [vmbackup](https://docs.victoriametrics.com/vmbackup.html): correctly check if specified `-dst` belongs to specified `-storageDataPath`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4837).
+
+## [v1.87.7](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.7)
+
+Released at 2023-08-12
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.20.4 to Go1.21.0.
+* SECURITY: upgrade base docker image (Alpine) from 3.18.2 to 3.18.3. See [alpine 3.18.3 release notes](https://alpinelinux.org/posts/Alpine-3.15.10-3.16.7-3.17.5-3.18.3-released.html).
+
+* BUGFIX: vmselect: fix timestamp alignment for Prometheus querying API if time argument is less than 10m from the beginning of Unix epoch.
+* BUGFIX: vminsert: fixed decoding of label values with slash when accepting data via [pushgateway protocol](https://docs.victoriametrics.com/#how-to-import-data-in-prometheus-exposition-format). This fixes Prometheus golang client compatibility. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4692).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly validate scheme for `proxy_url` field at the scrape config. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4811) for details.
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): close HTTP connections to [service discovery](https://docs.victoriametrics.com/sd_configs.html) servers when they are no longer needed. This should prevent from possible connection exhasution in some cases. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4724).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly apply `if` filters during [relabeling](https://docs.victoriametrics.com/vmagent.html#relabeling-enhancements). Previously the `if` filter could improperly work. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4806) and [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4816).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): fix possible panic at shutdown when [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html) is enabled. See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4407) for details.
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): use local scrape timestamps for the scraped metrics unless `honor_timestamps: true` option is explicitly set at [scrape_config](https://docs.victoriametrics.com/sd_configs.html#scrape_configs). This fixes gaps for metrics collected from [cadvisor](https://github.com/google/cadvisor) or similar exporters, which export metrics with invalid timestamps. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4697) and [this comment](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4697#issuecomment-1654614799) for details.
+* BUGFIX: [vmauth](https://docs.victoriametrics.com/vmauth.html): Properly handle LOCAL command for proxy protocol. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3335#issuecomment-1569864108).
+* BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): properly return error from [/api/v1/query](https://docs.victoriametrics.com/keyConcepts.html#instant-query) and [/api/v1/query_range](https://docs.victoriametrics.com/keyConcepts.html#range-query) at `vmselect` when the `-search.maxSamplesPerQuery` or `-search.maxSamplesPerSeries` [limit](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#resource-usage-limits) is exceeded. Previously incomplete response could be returned without the error if `vmselect` runs with `-replicationFactor` greater than 1. See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4472).
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): correctly calculate evaluation time for rules. Before, there was a low probability for discrepancy between actual time and rules evaluation time if evaluation interval was lower than the execution time for rules within the group.
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): reset evaluation timestamp after modifying group interval. Before, there could have latency on rule evaluation time.
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): Properly set datasource query params. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4340). Thanks to @gsakun for [the pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4341).
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): Properly form path to static assets in WEB UI if `http.pathPrefix` set. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4349).
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): properly return empty slices instead of nil for `/api/v1/rules` for groups with present name but absent `rules`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4221).
+* BUGFIX: [vmctl](https://docs.victoriametrics.com/vmctl.html): interrupt explore procedure in influx mode if vmctl found no numeric fields.
+* BUGFIX: [vmctl](https://docs.victoriametrics.com/vmctl.html): fix panic in case `--remote-read-filter-time-start` flag is not set for remote-read mode. This flag is now required to use remote-read mode. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4553).
+
+## [v1.87.6](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.6)
+
+Released at 2023-05-18
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.20.3 to Go1.20.4. See [the list of issues addressed in Go1.20.4](https://github.com/golang/go/issues?q=milestone%3AGo1.20.4+label%3ACherryPickApproved).
+* SECURITY: upgrade base docker image (alpine) from 3.17.3 to 3.18.0. See [alpine 3.18.0 release notes](https://www.alpinelinux.org/posts/Alpine-3.18.0-released.html).
+* SECURITY: serve `/robots.txt` content to disallow indexing of the exposed instances by search engines. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4128) for details.
+
+* BUGFIX: reduce the probability of sudden increase in the number of small parts on systems with small number of CPU cores.
+* BUGFIX: reduce the possibility of increased CPU usage when data with timestamps older than one hour is ingested into VictoriaMetrics. This reduces spikes for the graph `sum(rate(vm_slow_per_day_index_inserts_total))`. See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4258).
+* BUGFIX: do not ignore trailing empty field in CSV lines when [importing data in CSV format](https://docs.victoriametrics.com/#how-to-import-csv-data). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4048).
+* BUGFIX: disallow `"` chars when parsing Prometheus label names, since they aren't allowed by [Prometheus text exposition format](https://github.com/prometheus/docs/blob/main/content/docs/instrumenting/exposition_formats.md#text-format-example). Previously this could result in silent incorrect parsing of incorrect Prometheus labels such as `foo{"bar"="baz"}` or `{foo:"bar",baz="aaa"}`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4284).
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): fix a panic when the duration in the query contains uppercase `M` suffix. Such a suffix isn't allowed to use in durations, since it clashes with `a million` suffix, e.g. it isn't clear whether `rate(metric[5M])` means rate over 5 minutes, 5 months or 5 million seconds. See [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3589) and [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4120) issues.
+* BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): prevent from possible panic when the number of vmstorage nodes increases when [automatic vmstorage discovery](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#automatic-vmstorage-discovery) is enabled.
+* BUGFIX: properly limit the number of [OpenTSDB HTTP](https://docs.victoriametrics.com/#sending-opentsdb-data-via-http-apiput-requests) concurrent requests specified via `-maxConcurrentInserts` command-line flag. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4204). Thanks to @zouxiang1993 for [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4208).
+* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): properly return empty slices instead of nil for `/api/v1/rules` and `/api/v1/alerts` API handlers. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4221).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): add `__meta_kubernetes_endpoints_name` label for all ports discovered from endpoint. Previously, ports not matched by `Service` did not have this label. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4154) for details. Thanks to @thunderbird86 for discovering and [fixing](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4253) the issue.
+* BUGFIX: fix possible infinite loop during `indexdb` rotation when `-retentionTimezoneOffset` command-line flag is set and the local timezone is not UTC. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4207). Thanks to @faceair for [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4206).
+* BUGFIX: [vmauth](https://docs.victoriametrics.com/vmauth.html): do not return invalid auth credentials in http response by default, since it may be logged by client. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4188).
+* BUGFIX: [alerts-health](https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/deployment/docker/alerts-health.yml): update threshold for `TooHighMemoryUsage` alert from 90% to 80%, since 90% is too high for production environments.
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): properly handle the `vm_promscrape_config_last_reload_successful` metric after config reload. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4260).
+* BUGFIX: [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html): fix bug with duplicated labels during stream aggregation via single-node VictoriaMetrics. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4277).
+* BUGFIX: [stream aggregation](https://docs.victoriametrics.com/stream-aggregation.html): suppress `series after dedup` error message in logs when `-remoteWrite.streamAggr.dedupInterval` command-line flag is set at [vmagent](https://docs.victoriametrics.com/vmgent.html) or when `-streamAggr.dedupInterval` command-line flag is set at [single-node VictoriaMetrics](https://docs.victoriametrics.com/).
+
+## [v1.87.5](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.5)
+
+Released at 2023-04-06
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade base docker image (alpine) from 3.17.2 to 3.17.3. See [alpine 3.17.3 release notes](https://alpinelinux.org/posts/Alpine-3.17.3-released.html).
+* SECURITY: upgrade Go builder from Go1.20.2 to Go1.20.3. See [the list of issues addressed in Go1.20.3](https://github.com/golang/go/issues?q=milestone%3AGo1.20.3+label%3ACherryPickApproved).
+
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): properly convert [VictoriaMetrics historgram buckets](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350) to Prometheus histogram buckets when VictoriaMetrics histogram contain zero buckets. Previously these buckets were ignored, and this could lead to missing Prometheus histogram buckets after the conversion. Thanks to @zklapow for [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4021).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmgent.html): fix CPU and memory usage spikes when files pointed by [file_sd_config](https://docs.victoriametrics.com/sd_configs.html#file_sd_configs) cannot be re-read. See [this_issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3989).
+* BUGFIX: prevent unexpected merges on start-up when `-storage.minFreeDiskSpaceBytes` is set. See [the issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4023).
+* BUGFIX: properly support comma-separated filters inside [retention filters](https://docs.victoriametrics.com/#retention-filters). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3915).
+* BUGFIX: verify response code when fetching configuration files via HTTP. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4034).
+
+## [v1.87.4](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.4)
+
+Released at 2023-03-25
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* BUGFIX: prevent from slow [snapshot creating](https://docs.victoriametrics.com/#how-to-work-with-snapshots) under high data ingestion rate. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3551).
+* BUGFIX: [vmauth](https://docs.victoriametrics.com/vmauth.html):  suppress [proxy protocol](https://www.haproxy.org/download/2.3/doc/proxy-protocol.txt) parsing errors in case of `EOF`. Usually, the error is caused by health checks and is not a sign of an actual error.
+* BUGFIX: [vmbackup](https://docs.victoriametrics.com/vmbackup.html): fix snapshot not being deleted in case of error during backup. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2055).
+* BUGFIX: allow using dashes and dots in environment variables names referred in config files via `%{ENV-VAR.SYNTAX}`. See [these docs](https://docs.victoriametrics.com/#environment-variables) and [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3999).
+* BUGFIX: return back query performance scalability on hosts with big number of CPU cores. The scalability has been reduced in [v1.86.0](https://docs.victoriametrics.com/CHANGELOG.html#v1860). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3966).
+
+
+## [v1.87.3](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.3)
+
+Released at 2023-03-12
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade Go builder from Go1.20.1 to Go1.20.2. See [the list of issues addressed in Go1.20.2](https://github.com/golang/go/issues?q=milestone%3AGo1.20.2+label%3ACherryPickApproved).
+
+* BUGFIX: vmstorage: fix a bug, which could lead to incomplete or empty results for heavy queries selecting tens of thousands of time series. See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3946).
+* BUGFIX: vmselect: reduce memory usage and CPU usage when performing heavy queries. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3692).
+* BUGFIX: prevent from possible `invalid memory address or nil pointer dereference` panic during [background merge](https://docs.victoriametrics.com/#storage). The issue has been introduced at [v1.85.0](https://docs.victoriametrics.com/CHANGELOG.html#v1850). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3897).
+* BUGFIX: prevent from possible `SIGBUS` crash on ARM architectures (Raspberry Pi), which deny unaligned access to 8-byte words. Thanks to @oliverpool for narrowing down the issue and for [the initial attempt to fix it](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3927).
+* BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): always return `is_partial: true` in partial responses. Previously partial responses could be returned as non-partial in some cases.
+* BUGFIX: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): properly take into account `-rpc.disableCompression` command-line flag at `vmstorage`. It was ignored since [v1.78.0](https://docs.victoriametrics.com/CHANGELOG.html#v1780). See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3932).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): do not register `vm_promscrape_config_*` metrics if `-promscrape.config` flag is not used. Previously those metrics were registered and never updated, which was confusing and could trigger false-positive alerts.
+* BUGFIX: [vmctl](https://docs.victoriametrics.com/vmctl.html): skip measurements with no fields when migrating data from influxdb. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3837).
+* BUGFIX: [vmauth](https://docs.victoriametrics.com/vmauth.html): fix `cannot serve http` panic when plain HTTP request is sent to `vmauth` configured to accept requests over [proxy protocol](https://www.haproxy.org/download/2.3/doc/proxy-protocol.txt)-encoded request (e.g. when `vmauth` runs with `-httpListenAddr.useProxyProtocol` command-line flag). The issue has been introduced at [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) when implementing [this feature](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3335).
+
+## [v1.87.2](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.2)
+
+Released at 2023-02-24
+
+**v1.87.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.87.x line will be supported for at least 12 months since [v1.87.0](https://docs.victoriametrics.com/CHANGELOG.html#v1870) release**
+
+* SECURITY: upgrade base docker image (alpine) from 3.17.1 to 3.17.2. See [alpine 3.17.2 release notes](https://alpinelinux.org/posts/Alpine-3.17.2-released.html).
+* SECURITY: upgrade Go builder from Go1.20.0 to Go1.20.1. See [the list of issues addressed in Go1.20.1](https://github.com/golang/go/issues?q=milestone%3AGo1.20.1+label%3ACherryPickApproved).
+
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): immediately cancel in-flight scrape requests during configuration reload when [stream parsing mode](https://docs.victoriametrics.com/vmagent.html#stream-parsing-mode) is disabled. Previously `vmagent` could wait for long time until all the in-flight requests are completed before reloading the configuration. This could significantly slow down configuration reload. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3747).
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): do not wait for 2 seconds after the first unsuccessful attempt to scrape the target before performing the next attempt. This should improve scrape speed when the target closes [http keep-alive connection](https://en.wikipedia.org/wiki/HTTP_persistent_connection) between scrapes. See [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3293) and [this](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3747) issues.
+* BUGFIX: [vmagent](https://docs.victoriametrics.com/vmagent.html): fix [Azure service discovery](https://docs.victoriametrics.com/sd_configs.html#azure_sd_configs) inside [Azure Container App](https://learn.microsoft.com/en-us/azure/container-apps/overview). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3830). Thanks to @MattiasAng for the fix!
+* BUGFIX: do not put auxiliary directories scheduled for removal into snapshots. This should prevent from `cannot create hard links from ...must-remove...` errors when making snapshots / backups. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3858).
+* BUGFIX: prevent from possible data ingestion slowdown and query performance slowdown during [background merges of big parts](https://docs.victoriametrics.com/#storage) on systems with small number of CPU cores (1 or 2 CPU cores). The issue has been introduced in [v1.85.0](https://docs.victoriametrics.com/CHANGELOG.html#v1850) when implementing [this feature](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3337). See also [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3790).
+* BUGFIX: properly parse timestamps in milliseconds when [ingesting data via OpenTSDB telnet put protocol](https://docs.victoriametrics.com/#sending-data-via-telnet-put-protocol). Previously timestamps in milliseconds were mistakenly multiplied by 1000. Thanks to @Droxenator for the [pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3810).
+* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): do not add extrapolated points outside the real points when using [interpolate()](https://docs.victoriametrics.com/MetricsQL.html#interpolate) function. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3816).
 
 ## [v1.87.1](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.1)
 
@@ -520,6 +726,18 @@ Released at 2022-08-08
 * BUGFIX: [vmui](https://docs.victoriametrics.com/#vmui): properly show date picker at `Table` tab. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2874).
 * BUGFIX: properly generate http redirects if `-http.pathPrefix` command-line flag is set. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2918).
 
+## [v1.79.9](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.79.9)
+
+Released at 2023-02-24
+
+**v1.79.x is a line of LTS releases (e.g. long-time support). It contains important up-to-date bugfixes.
+The v1.79.x line will be supported for at least 12 months since [v1.79.0](https://docs.victoriametrics.com/CHANGELOG.html#v1790) release**
+
+* SECURITY: upgrade base docker image (alpine) from 3.17.1 to 3.17.2. See [alpine 3.17.2 release notes](https://alpinelinux.org/posts/Alpine-3.17.2-released.html).
+* SECURITY: upgrade Go builder from Go1.20.0 to Go1.20.1. See [the list of issues addressed in Go1.20.1](https://github.com/golang/go/issues?q=milestone%3AGo1.20.1+label%3ACherryPickApproved).
+
+* BUGFIX: properly parse timestamps in milliseconds when [ingesting data via OpenTSDB telnet put protocol](https://docs.victoriametrics.com/#sending-data-via-telnet-put-protocol). Previously timestamps in milliseconds were mistakenly multiplied by 1000. Thanks to @Droxenator for the [pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3810).
+
 ## [v1.79.8](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.79.8)
 
 Released at 2023-02-03

docs/Cluster-VictoriaMetrics.md

@@ -1224,7 +1224,7 @@ Below is the output for `/path/to/vmstorage -help`:
 
 ```
   -bigMergeConcurrency int
-     The maximum number of CPU cores to use for big merges. Default value is used if set to 0
+     Deprecated: this flag does nothing. Please use -smallMergeConcurrency for controlling the concurrency of background merges. See https://docs.victoriametrics.com/#storage
   -cacheExpireDuration duration
      Items are removed from in-memory caches after they aren't accessed for this duration. Lower values may reduce memory usage at the cost of higher CPU usage. See also -prevCacheRemovalPercent (default 30m0s)
   -cluster.tls
@@ -1287,6 +1287,8 @@ Below is the output for `/path/to/vmstorage -help`:
      Address to listen for http connections. See also -httpListenAddr.useProxyProtocol (default ":8482")
   -httpListenAddr.useProxyProtocol
      Whether to use proxy protocol for connections accepted at -httpListenAddr . See https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
+  -inmemoryDataFlushInterval duration
+     The interval for guaranteed saving of in-memory data to disk. The saved data survives unclean shutdowns such as OOM crash, hardware reset, SIGKILL, etc. Bigger intervals may help increase the lifetime of flash storage with limited write cycles (e.g. Raspberry PI). Smaller intervals increase disk IO load. Minimum supported value is 1s (default 5s)
   -insert.maxQueueDuration duration
      The maximum duration to wait in the queue when -maxConcurrentInserts concurrent insert requests are executed (default 1m0s)
   -internStringMaxLen int
@@ -1355,7 +1357,7 @@ Below is the output for `/path/to/vmstorage -help`:
   -search.maxUniqueTimeseries int
      The maximum number of unique time series, which can be scanned during every query. This allows protecting against heavy queries, which select unexpectedly high number of series. Zero means 'no limit'. See also -search.max* command-line flags at vmselect
   -smallMergeConcurrency int
-     The maximum number of CPU cores to use for small merges. Default value is used if set to 0
+     The maximum number of workers for background merges. See https://docs.victoriametrics.com/#storage . It isn't recommended tuning this flag in general case, since this may lead to uncontrolled increase in the number of parts and increased CPU usage during queries
   -snapshotAuthKey string
      authKey, which must be passed in query string to /snapshot* pages
   -snapshotsMaxAge value

docs/README.md

@@ -2131,7 +2131,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
 
 ```
   -bigMergeConcurrency int
-     The maximum number of CPU cores to use for big merges. Default value is used if set to 0
+     Deprecated: this flag does nothing. Please use -smallMergeConcurrency for controlling the concurrency of background merges. See https://docs.victoriametrics.com/#storage
   -cacheExpireDuration duration
      Items are removed from in-memory caches after they aren't accessed for this duration. Lower values may reduce memory usage at the cost of higher CPU usage. See also -prevCacheRemovalPercent (default 30m0s)
   -configAuthKey string
@@ -2470,7 +2470,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
   -selfScrapeJob string
      Value for 'job' label, which is added to self-scraped metrics (default "victoria-metrics")
   -smallMergeConcurrency int
-     The maximum number of CPU cores to use for small merges. Default value is used if set to 0
+     The maximum number of workers for background merges. See https://docs.victoriametrics.com/#storage . It isn't recommended tuning this flag in general case, since this may lead to uncontrolled increase in the number of parts and increased CPU usage during queries
   -snapshotAuthKey string
      authKey, which must be passed in query string to /snapshot* pages
   -snapshotsMaxAge value

docs/Single-server-VictoriaMetrics.md

@@ -2134,7 +2134,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
 
 ```
   -bigMergeConcurrency int
-     The maximum number of CPU cores to use for big merges. Default value is used if set to 0
+     Deprecated: this flag does nothing. Please use -smallMergeConcurrency for controlling the concurrency of background merges. See https://docs.victoriametrics.com/#storage
   -cacheExpireDuration duration
      Items are removed from in-memory caches after they aren't accessed for this duration. Lower values may reduce memory usage at the cost of higher CPU usage. See also -prevCacheRemovalPercent (default 30m0s)
   -configAuthKey string
@@ -2473,7 +2473,7 @@ Pass `-help` to VictoriaMetrics in order to see the list of supported command-li
   -selfScrapeJob string
      Value for 'job' label, which is added to self-scraped metrics (default "victoria-metrics")
   -smallMergeConcurrency int
-     The maximum number of CPU cores to use for small merges. Default value is used if set to 0
+     The maximum number of workers for background merges. See https://docs.victoriametrics.com/#storage . It isn't recommended tuning this flag in general case, since this may lead to uncontrolled increase in the number of parts and increased CPU usage during queries
   -snapshotAuthKey string
      authKey, which must be passed in query string to /snapshot* pages
   -snapshotsMaxAge value

docs/sd_configs.md

@@ -88,6 +88,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_azure_subscription_id`: the subscription ID
 * `__meta_azure_tenant_id`: the tenant ID
 
+The list of discovered Azure targets is refreshed at the interval, which can be configured via `-promscrape.azureSDCheckInterval` command-line flag.
 
 ## consul_sd_configs
 
@@ -173,6 +174,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_consul_tagpresent_<tagname>`: "true" for every <tagname> tag of the target
 * `__meta_consul_tags`: the list of tags of the target joined by the `tag_separator`
 
+The list of discovered Consul targets is refreshed at the interval, which can be configured via `-promscrape.consulSDCheckInterval` command-line flag.
 
 ## digitalocean_sd_configs
 
@@ -211,6 +213,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_digitalocean_tags`: the comma-separated list of tags of the droplet
 * `__meta_digitalocean_vpc`: the id of the droplet's VPC
 
+The list of discovered DigitalOcean targets is refreshed at the interval, which can be configured via `-promscrape.digitaloceanSDCheckInterval` command-line flag.
 
 ## dns_sd_configs
 
@@ -243,6 +246,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_dns_srv_record_port`: the port field of the SRV record
 * `__meta_dns_mx_record_target`: the target field of the MX record.
 
+The list of discovered DNS targets is refreshed at the interval, which can be configured via `-promscrape.dnsSDCheckInterval` command-line flag.
 
 ## docker_sd_configs
 
@@ -293,6 +297,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_docker_port_public`: the external port if a port-mapping exists
 * `__meta_docker_port_public_ip`: the public IP if a port-mapping exists
 
+The list of discovered Docker targets is refreshed at the interval, which can be configured via `-promscrape.dockerSDCheckInterval` command-line flag.
 
 ## dockerswarm_sd_configs
 
@@ -413,6 +418,7 @@ One of the following roles can be configured to discover targets:
   * `__meta_dockerswarm_node_role`: the role of the node
   * `__meta_dockerswarm_node_status`: the status of the node
 
+The list of discovered Docker Swarm targets is refreshed at the interval, which can be configured via `-promscrape.dockerswarmSDCheckInterval` command-line flag.
 
 ## ec2_sd_configs
 
@@ -491,6 +497,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_ec2_tag_<tagkey>`: each tag value of the instance
 * `__meta_ec2_vpc_id`: the ID of the VPC in which the instance is running, if available
 
+The list of discovered EC2 targets is refreshed at the interval, which can be configured via `-promscrape.ec2SDCheckInterval` command-line flag.
 
 ## eureka_sd_configs
 
@@ -531,11 +538,11 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_eureka_app_instance_datacenterinfo_name`: the datacenter name of the app instance
 * `__meta_eureka_app_instance_datacenterinfo_metadata_<metadataname>`: the datacenter metadata
 
+The list of discovered Eureka targets is refreshed at the interval, which can be configured via `-promscrape.eurekaSDCheckInterval` command-line flag.
 
 ## file_sd_configs
 
 File-based service discovery reads a set of files with lists of targets to scrape.
-Scrape targets are automatically updated when the underlying files are changed with the interval
 
 Configuration example:
 
@@ -583,6 +590,7 @@ The following meta labels are available on discovered targets during [relabeling
 
 See the [list of integrations](https://prometheus.io/docs/operating/integrations/#file-service-discovery) with `file_sd_configs`.
 
+The list of discovered file-based targets is refreshed at the interval, which can be configured via `-promscrape.fileSDCheckInterval` command-line flag.
 
 ## gce_sd_configs
 
@@ -639,6 +647,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_gce_tags`: list of instance tags separated by tag_separator
 * `__meta_gce_zone`: the GCE zone URL in which the instance is running
 
+The list of discovered GCE targets is refreshed at the interval, which can be configured via `-promscrape.gceSDCheckInterval` command-line flag.
 
 ## http_sd_configs
 
@@ -679,6 +688,7 @@ The following meta labels are available on discovered targets during [relabeling
 
 * `__meta_url`: the URL from which the target was extracted
 
+The list of discovered HTTP-based targets is refreshed at the interval, which can be configured via `-promscrape.httpSDCheckInterval` command-line flag.
 
 ## kubernetes_sd_configs
 
@@ -872,6 +882,8 @@ One of the following `role` types can be configured to discover targets:
   * `__meta_kubernetes_ingress_scheme`: Protocol scheme of ingress, https if TLS config is set. Defaults to http.
   * `__meta_kubernetes_ingress_path`: Path from ingress spec. Defaults to `/`.
 
+The list of discovered Kuberntes targets is refreshed at the interval, which can be configured via `-promscrape.kubernetesSDCheckInterval` command-line flag.
+
 ## nomad_sd_configs
 
 Nomad SD configuration allows retrieving scrape targets from [HashiCorp Nomad Services](https://www.hashicorp.com/blog/nomad-service-discovery).
@@ -927,6 +939,8 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_nomad_tagpresent_<tagname>`: "true" for every <tagname> tag of the target
 * `__meta_nomad_tags`: the list of tags of the target joined by the `tag_separator`
 
+The list of discovered Nomad targets is refreshed at the interval, which can be configured via `-promscrape.nomadSDCheckInterval` command-line flag.
+
 ## openstack_sd_configs
 
 OpenStack SD configuration allows retrieving scrape targets from [OpenStack Nova](https://docs.openstack.org/nova/latest/) instances.
@@ -1035,6 +1049,7 @@ One of the following `role` types can be configured to discover targets:
   * `__meta_openstack_tag_<tagkey>`: each tag value of the instance.
   * `__meta_openstack_user_id`: the user account owning the tenant.
 
+The list of discovered OpenStack targets is refreshed at the interval, which can be configured via `-promscrape.openstackSDCheckInterval` command-line flag.
 
 ## static_configs
 
@@ -1136,6 +1151,7 @@ The following meta labels are available on discovered targets during [relabeling
 * `__meta_yandexcloud_instance_private_dns_<record number>`: if configured DNS records for private IP
 * `__meta_yandexcloud_instance_public_dns_<record number>`: if configured DNS records for public IP
 
+The list of discovered Yandex Cloud targets is refreshed at the interval, which can be configured via `-promscrape.yandexcloudSDCheckInterval` command-line flag.
 
 ## scrape_configs
 
@@ -1208,7 +1224,8 @@ scrape_configs:
   # If honor_timestamps is set to "false", the timestamps of the metrics exposed
   # by the target will be ignored.
   #
-  # By default honor_timestamps is set to true.
+  # By default, honor_timestamps is set to false.
+  # See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4697#issuecomment-1656540535 for details.
   # honor_timestamps: <boolean>
 
   # scheme configures the protocol scheme used for requests.

go.mod

@@ -1,119 +1,136 @@
 module github.com/VictoriaMetrics/VictoriaMetrics
 
-go 1.19
+go 1.20
+
+// Newer versions of this package break vmselect build
+replace github.com/VictoriaMetrics/metricsql => github.com/VictoriaMetrics/metricsql v0.56.2
 
 require (
-	cloud.google.com/go/storage v1.29.0
-	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.3.1
-	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.0.0
-	github.com/VictoriaMetrics/fastcache v1.12.0
+	cloud.google.com/go/storage v1.36.0
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.9.1
+	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.2.1
+	github.com/VictoriaMetrics/fastcache v1.12.2
 
 	// Do not use the original github.com/valyala/fasthttp because of issues
 	// like https://github.com/valyala/fasthttp/commit/996610f021ff45fdc98c2ce7884d5fa4e7f9199b
-	github.com/VictoriaMetrics/fasthttp v1.1.0
-	github.com/VictoriaMetrics/metrics v1.23.1
-	github.com/VictoriaMetrics/metricsql v0.51.2
-	github.com/aws/aws-sdk-go-v2 v1.17.4
-	github.com/aws/aws-sdk-go-v2/config v1.18.12
-	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.51
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.30.2
+	github.com/VictoriaMetrics/fasthttp v1.2.0
+	github.com/VictoriaMetrics/metrics v1.31.0
+	github.com/VictoriaMetrics/metricsql v0.70.0
+	github.com/aws/aws-sdk-go-v2 v1.24.1
+	github.com/aws/aws-sdk-go-v2/config v1.26.4
+	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.15.12
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.48.0
 	github.com/cespare/xxhash/v2 v2.2.0
-	github.com/cheggaaa/pb/v3 v3.1.0
+	github.com/cheggaaa/pb/v3 v3.1.4
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/snappy v0.0.4
-	github.com/googleapis/gax-go/v2 v2.7.0
-	github.com/influxdata/influxdb v1.11.0
-	github.com/klauspost/compress v1.15.15
-	github.com/prometheus/prometheus v0.42.0
-	github.com/urfave/cli/v2 v2.24.3
+	github.com/googleapis/gax-go/v2 v2.12.0
+	github.com/influxdata/influxdb v1.11.4
+	github.com/klauspost/compress v1.17.4
+	github.com/prometheus/prometheus v0.48.1
+	github.com/urfave/cli/v2 v2.27.1
 	github.com/valyala/fastjson v1.6.4
 	github.com/valyala/fastrand v1.1.0
 	github.com/valyala/fasttemplate v1.2.2
-	github.com/valyala/gozstd v1.17.0
+	github.com/valyala/gozstd v1.20.1
 	github.com/valyala/histogram v1.2.0
 	github.com/valyala/quicktemplate v1.7.0
-	golang.org/x/net v0.6.0
-	golang.org/x/oauth2 v0.5.0
-	golang.org/x/sys v0.5.0
-	google.golang.org/api v0.109.0
+	golang.org/x/net v0.20.0
+	golang.org/x/oauth2 v0.16.0
+	golang.org/x/sys v0.16.0
+	google.golang.org/api v0.156.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
 require (
-	cloud.google.com/go v0.109.0 // indirect
-	cloud.google.com/go/compute v1.18.0 // indirect
+	cloud.google.com/go v0.112.0 // indirect
+	cloud.google.com/go/compute v1.23.3 // indirect
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
-	cloud.google.com/go/iam v0.10.0 // indirect
-	github.com/Azure/azure-sdk-for-go/sdk/internal v1.1.2 // indirect
+	cloud.google.com/go/iam v1.1.5 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.4.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.5.1 // indirect
+	github.com/AzureAD/microsoft-authentication-library-for-go v1.2.1 // indirect
 	github.com/VividCortex/ewma v1.2.0 // indirect
-	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
-	github.com/aws/aws-sdk-go v1.44.198 // indirect
-	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.10 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.13.12 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.12.22 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.28 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.22 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.29 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/v4a v1.0.19 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.9.11 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.1.23 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.22 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.13.22 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.12.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.18.3 // indirect
-	github.com/aws/smithy-go v1.13.5 // indirect
+	github.com/alecthomas/units v0.0.0-20231202071711-9a357b53e9c9 // indirect
+	github.com/aws/aws-sdk-go v1.49.22 // indirect
+	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.5.4 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.16.15 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.14.11 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.2.10 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.5.10 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.7.2 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.2.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.10.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.2.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.10.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.16.10 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.18.6 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.21.7 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.26.7 // indirect
+	github.com/aws/smithy-go v1.19.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.3 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dennwc/varint v1.0.0 // indirect
-	github.com/fatih/color v1.14.1 // indirect
-	github.com/felixge/httpsnoop v1.0.3 // indirect
+	github.com/fatih/color v1.16.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-kit/log v0.2.1 // indirect
 	github.com/go-logfmt/logfmt v0.6.0 // indirect
-	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.0 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/go-cmp v0.5.9 // indirect
-	github.com/google/uuid v1.3.0 // indirect
-	github.com/googleapis/enterprise-certificate-proxy v0.2.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/s2a-go v0.1.7 // indirect
+	github.com/google/uuid v1.5.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
 	github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.17 // indirect
-	github.com/mattn/go-runewidth v0.0.14 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
 	github.com/oklog/ulid v1.3.1 // indirect
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.14.0 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.39.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/prometheus/client_golang v1.18.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.46.0 // indirect
 	github.com/prometheus/common/sigv4 v0.1.0 // indirect
-	github.com/prometheus/procfs v0.9.0 // indirect
-	github.com/rivo/uniseg v0.4.3 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/rivo/uniseg v0.4.4 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/stretchr/testify v1.8.1 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	github.com/xrash/smetrics v0.0.0-20231213231151-1d8dd44e695e // indirect
 	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.39.0 // indirect
-	go.opentelemetry.io/otel v1.13.0 // indirect
-	go.opentelemetry.io/otel/metric v0.36.0 // indirect
-	go.opentelemetry.io/otel/trace v1.13.0 // indirect
-	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/goleak v1.2.0 // indirect
-	golang.org/x/exp v0.0.0-20230206171751-46f607a40771 // indirect
-	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/text v0.7.0 // indirect
-	golang.org/x/time v0.3.0 // indirect
-	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc // indirect
-	google.golang.org/grpc v1.53.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	go.opentelemetry.io/collector/pdata v1.0.1 // indirect
+	go.opentelemetry.io/collector/semconv v0.92.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.46.1 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.46.1 // indirect
+	go.opentelemetry.io/otel v1.21.0 // indirect
+	go.opentelemetry.io/otel/metric v1.21.0 // indirect
+	go.opentelemetry.io/otel/trace v1.21.0 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	go.uber.org/goleak v1.3.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/time v0.5.0 // indirect
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	google.golang.org/appengine v1.6.8 // indirect
+	google.golang.org/genproto v0.0.0-20240108191215-35c7eff3a6b1 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240108191215-35c7eff3a6b1 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240108191215-35c7eff3a6b1 // indirect
+	google.golang.org/grpc v1.60.1 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -13,23 +13,22 @@ cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKV
 cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
 cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.109.0 h1:38CZoKGlCnPZjGdyj0ZfpoGae0/wgNfy5F0byyxg0Gk=
-cloud.google.com/go v0.109.0/go.mod h1:2sYycXt75t/CSB5R9M2wPU1tJmire7AQZTPtITcGBVE=
+cloud.google.com/go v0.112.0 h1:tpFCD7hpHFlQ8yPwT3x+QeXqc2T6+n6T+hmABHfDUSM=
+cloud.google.com/go v0.112.0/go.mod h1:3jEEVwZ/MHU4djK5t5RHuKOA/GbLddgTdVubX1qnPD4=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
 cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
 cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
 cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/compute v1.18.0 h1:FEigFqoDbys2cvFkZ9Fjq4gnHBP55anJ0yQyau2f9oY=
-cloud.google.com/go/compute v1.18.0/go.mod h1:1X7yHxec2Ga+Ss6jPyjxRxpu2uu7PLgsOVXvgU0yacs=
+cloud.google.com/go/compute v1.23.3 h1:6sVlXXBmbd7jNX0Ipq0trII3e4n1/MsADLK6a+aiVlk=
+cloud.google.com/go/compute v1.23.3/go.mod h1:VCgBUoMnIVIR0CscqQiPJLAG25E3ZRZMzcFZeQ+h8CI=
 cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
 cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/iam v0.10.0 h1:fpP/gByFs6US1ma53v7VxhvbJpO2Aapng6wabJ99MuI=
-cloud.google.com/go/iam v0.10.0/go.mod h1:nXAECrMt2qHpF6RZUZseteD6QyanL68reN4OXPw0UWM=
-cloud.google.com/go/longrunning v0.3.0 h1:NjljC+FYPV3uh5/OwWT6pVU+doBqMg2x/rZlE+CamDs=
+cloud.google.com/go/iam v1.1.5 h1:1jTsCu4bcsNsE4iiqNT5SHwrDRCfRmIaaaVFhRveTJI=
+cloud.google.com/go/iam v1.1.5/go.mod h1:rB6P/Ic3mykPbFio+vo7403drjlgvoWfYpJhMXEbzv8=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
@@ -39,39 +38,35 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-cloud.google.com/go/storage v1.29.0 h1:6weCgzRvMg7lzuUurI4697AqIRPU1SvzHhynwpW31jI=
-cloud.google.com/go/storage v1.29.0/go.mod h1:4puEjyTKnku6gfKoTfNOU/W+a9JyuVNxjpS5GBrB8h4=
+cloud.google.com/go/storage v1.36.0 h1:P0mOkAcaJxhCTvAkMhxMfrTKiNcub4YmmPBtlhAyTr8=
+cloud.google.com/go/storage v1.36.0/go.mod h1:M6M/3V/D3KpzMTJyPOR/HU6n2Si5QdaXYEsng2xgOs8=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/Azure/azure-sdk-for-go v65.0.0+incompatible h1:HzKLt3kIwMm4KeJYTdx9EbjRYTySD/t8i1Ee/W5EGXw=
-github.com/Azure/azure-sdk-for-go/sdk/azcore v1.3.1 h1:gVXuXcWd1i4C2Ruxe321aU+IKGaStvGB/S90PUPB/W8=
-github.com/Azure/azure-sdk-for-go/sdk/azcore v1.3.1/go.mod h1:DffdKW9RFqa5VgmsjUOsS7UE7eiA5iAvYUs63bhKQ0M=
-github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.1.0 h1:QkAcEIAKbNL4KoFr4SathZPhDhF4mVwpBMFlYjyAqy8=
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@@ -185,21 +179,21 @@ github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG
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@@ -308,6 +303,7 @@ github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCV
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@@ -419,10 +414,11 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
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@@ -432,16 +428,16 @@ github.com/valyala/fastrand v1.1.0 h1:f+5HkLW4rsgzdNoleUOB69hyT9IlD2ZQh9GyDMfb5G
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@@ -454,18 +450,27 @@ go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.46.1/go.mod h1:4UoMYEZOC0yN/sPGH76KPkkU7zgiEWYWL9vwmbnTJPE=
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+go.opentelemetry.io/otel/metric v1.21.0/go.mod h1:o1p3CA8nNHW8j5yuQLdc1eeqEaPfzug24uvsyIEJRWM=
+go.opentelemetry.io/otel/sdk v1.21.0 h1:FTt8qirL1EysG6sTQRZ5TokkU8d0ugCj8htOgThZXQ8=
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+go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -474,7 +479,8 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
+golang.org/x/crypto v0.18.0 h1:PGVlW0xEltQnzFZ55hkuX5+KLyrMYhHld1YHO4AKcdc=
+golang.org/x/crypto v0.18.0/go.mod h1:R0j02AL6hcrfOiy9T4ZYp/rcWeMxM3L6QYxlOuEG1mg=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -485,8 +491,8 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
-golang.org/x/exp v0.0.0-20230206171751-46f607a40771 h1:xP7rWLUr1e1n2xkK5YB4LI0hPEy3LJC6Wk+D4pGlOJg=
-golang.org/x/exp v0.0.0-20230206171751-46f607a40771/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3 h1:hNQpMuAJe5CtcUqCXaWga3FHu+kQvCqcsoVaQgSV60o=
+golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3/go.mod h1:idGWGoKP1toJGkd5/ig9ZLuPcZBC3ewk7SzmH0uou08=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -499,7 +505,6 @@ golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHl
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 h1:VLliZ0d+/avPrXXH+OakdXhpJuEoBZuwh1m2j7U6Iug=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
@@ -509,7 +514,7 @@ golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.7.0 h1:LapD9S96VoQRhi/GrNTqeBJFrUjs5UHCAtTlgwA5oZA=
+golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -544,17 +549,16 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
-golang.org/x/net v0.6.0 h1:L4ZwwTvKW9gr0ZMS1yrHD9GZhIuVjOBBnaKH+SPQK0Q=
-golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
+golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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-golang.org/x/oauth2 v0.5.0 h1:HuArIo48skDwlrvM3sEdHXElYslAMsf3KwRkkW4MC4s=
-golang.org/x/oauth2 v0.5.0/go.mod h1:9/XBHVqLaWO3/BRHs5jbpYCnOZVjj5V0ndyaAM7KB4I=
+golang.org/x/oauth2 v0.16.0 h1:aDkGMBSYxElaoP81NpoUoz2oo2R2wHdZpGToUxfyQrQ=
+golang.org/x/oauth2 v0.16.0/go.mod h1:hqZ+0LWXsiVoZpeld6jVt06P3adbS2Uu911W1SsJv2o=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -566,8 +570,8 @@ golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -585,7 +589,6 @@ golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -607,18 +610,17 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0 h1:n2a8QNdAb0sZNpU9R1ALUXBbY+w51fCQDN+7EdxNBsY=
+golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -626,14 +628,14 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
-golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk=
+golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
@@ -677,13 +679,13 @@ golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.5.0 h1:+bSpV5HIeWkuvgaMfI3UmKRThoTA5ODJTUd8T17NO+4=
+golang.org/x/tools v0.17.0 h1:FvmRgNOcs3kOa+T20R1uhfP9F6HgG2mfxDv1vrx1Htc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 h1:H2TDz8ibqkAF6YGhCdN3jS9O0/s90v0rJh3X/OLHEUk=
-golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8=
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+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028/go.mod h1:NDW/Ps6MPRej6fsCIbMTohpP40sJ/P/vI1MoTEGwX90=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
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 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
@@ -700,16 +702,16 @@ google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0M
 google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
-google.golang.org/api v0.109.0 h1:sW9hgHyX497PP5//NUM7nqfV8D0iDfBApqq7sOh1XR8=
-google.golang.org/api v0.109.0/go.mod h1:2Ts0XTHNVWxypznxWOYUeI4g3WdP9Pk2Qk58+a/O9MY=
+google.golang.org/api v0.156.0 h1:yloYcGbBtVYjLKQe4enCunxvwn3s2w/XPrrhVf6MsvQ=
+google.golang.org/api v0.156.0/go.mod h1:bUSmn4KFO0Q+69zo9CNIDp4Psi6BqM0np0CbzKRSiSY=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c=
-google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
+google.golang.org/appengine v1.6.8 h1:IhEN5q69dyKagZPYMSdIjS2HqprW324FRQZJcGqPAsM=
+google.golang.org/appengine v1.6.8/go.mod h1:1jJ3jBArFh5pcgW8gCtRJnepW8FzD1V44FJffLiz/Ds=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -739,8 +741,12 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc
 google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc h1:ijGwO+0vL2hJt5gaygqP2j6PfflOBrRot0IczKbmtio=
-google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
+google.golang.org/genproto v0.0.0-20240108191215-35c7eff3a6b1 h1:/IWabOtPziuXTEtI1KYCpM6Ss7vaAkeMxk+uXV/xvZs=
+google.golang.org/genproto v0.0.0-20240108191215-35c7eff3a6b1/go.mod h1:+Rvu7ElI+aLzyDQhpHMFMMltsD6m7nqpuWDd2CwJw3k=
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+google.golang.org/genproto/googleapis/rpc v0.0.0-20240108191215-35c7eff3a6b1 h1:gphdwh0npgs8elJ4T6J+DQJHPVF7RsuJHCfwztUb4J4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240108191215-35c7eff3a6b1/go.mod h1:daQN87bsDqDoe316QbbvX60nMoJQa4r6Ds0ZuoAe5yA=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
@@ -754,8 +760,8 @@ google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3Iji
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
-google.golang.org/grpc v1.53.0 h1:LAv2ds7cmFV/XTS3XG1NneeENYrXGmorPxsBbptIjNc=
-google.golang.org/grpc v1.53.0/go.mod h1:OnIrk0ipVdj4N5d9IUoFUx72/VlD7+jUsHwZgwSMQpw=
+google.golang.org/grpc v1.60.1 h1:26+wFr+cNqSGFcOXcabYC0lUVJVRa2Sb2ortSK7VrEU=
+google.golang.org/grpc v1.60.1/go.mod h1:OlCHIeLYqSSsLi6i49B5QGdzaMZK9+M7LXN2FKz4eGM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -768,8 +774,8 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
+google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -777,7 +783,7 @@ gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
-gopkg.in/ini.v1 v1.66.6 h1:LATuAqN/shcYAOkv3wl2L4rkaKqkcgTBQjOyYDvcPKI=
+gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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@@ -796,16 +802,16 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
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-k8s.io/api v0.26.1 h1:f+SWYiPd/GsiWwVRz+NbFyCgvv75Pk9NK6dlkZgpCRQ=
-k8s.io/apimachinery v0.26.1 h1:8EZ/eGJL+hY/MYCNwhmDzVqq2lPl3N3Bo8rvweJwXUQ=
-k8s.io/client-go v0.26.1 h1:87CXzYJnAMGaa/IDDfRdhTzxk/wzGZ+/HUQpqgVSZXU=
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-k8s.io/utils v0.0.0-20221128185143-99ec85e7a448 h1:KTgPnR10d5zhztWptI952TNtt/4u5h3IzDXkdIMuo2Y=
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 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
-sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=
+sigs.k8s.io/structured-merge-diff/v4 v4.3.0 h1:UZbZAZfX0wV2zr7YZorDz6GXROfDFj6LvqCRm4VUVKk=
 sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=

lib/auth/auth.go

@@ -24,12 +24,7 @@ func (t *Token) String() string {
 }
 
 // NewToken returns new Token for the given authToken.
-//
-// If authToken == "multitenant", then nil Token is returned.
 func NewToken(authToken string) (*Token, error) {
-	if authToken == "multitenant" {
-		return nil, nil
-	}
 	var t Token
 	if err := t.Init(authToken); err != nil {
 		return nil, err
@@ -37,6 +32,16 @@ func NewToken(authToken string) (*Token, error) {
 	return &t, nil
 }
 
+// NewTokenPossibleMultitenant returns new Token for the given authToken.
+//
+// If authToken == "multitenant", then nil Token is returned.
+func NewTokenPossibleMultitenant(authToken string) (*Token, error) {
+	if authToken == "multitenant" {
+		return nil, nil
+	}
+	return NewToken(authToken)
+}
+
 // Init initializes t from authToken.
 func (t *Token) Init(authToken string) error {
 	tmp := strings.Split(authToken, ":")

lib/auth/auth_test.go

@@ -26,6 +26,24 @@ func TestNewTokenSuccess(t *testing.T) {
 	f("1:4294967295", "1:4294967295")
 	// max uint32 accountID and projectID
 	f("4294967295:4294967295", "4294967295:4294967295")
+}
+
+func TestNewTokenPossibleMultitenantSuccess(t *testing.T) {
+	f := func(token string, want string) {
+		t.Helper()
+		newToken, err := NewTokenPossibleMultitenant(token)
+		if err != nil {
+			t.Fatalf("unexpected error: %s", err)
+		}
+		got := newToken.String()
+		if got != want {
+			t.Fatalf("unexpected NewToken() result;got\n%s\nwant\n%s", got, want)
+		}
+	}
+	// token with accountID only
+	f("1", "1")
+	// token with accountID and projecTID
+	f("1:2", "1:2")
 	// multitenant
 	f("multitenant", "multitenant")
 }
@@ -75,4 +93,6 @@ func TestNewTokenFailure(t *testing.T) {
 	f("a:b:c")
 	// many int parts in the token"
 	f("1:2:3")
+	// multitenant
+	f("multitenant")
 }

lib/backup/actions/util.go

@@ -3,6 +3,7 @@ package actions
 import (
 	"flag"
 	"fmt"
+	"path/filepath"
 	"strings"
 	"sync"
 	"time"
@@ -194,7 +195,7 @@ func NewRemoteFS(path string) (common.RemoteFS, error) {
 			return nil, fmt.Errorf("dir must be absolute; got %q", dir)
 		}
 		fs := &fsremote.FS{
-			Dir: dir,
+			Dir: filepath.Clean(dir),
 		}
 		return fs, nil
 	case "gcs", "gs":

lib/backup/s3remote/s3.go

@@ -148,7 +148,7 @@ func (fs *FS) ListParts() ([]common.Part, error) {
 				continue
 			}
 
-			p.ActualSize = uint64(o.Size)
+			p.ActualSize = uint64(*o.Size)
 			parts = append(parts, p)
 		}
 

lib/encoding/encoding_pure_test.go

@@ -21,7 +21,7 @@ func TestMarshalUnmarshalInt64Array(t *testing.T) {
 		v += int64(r.NormFloat64() * 1e6)
 		va = append(va, v)
 	}
-	for precisionBits := uint8(1); precisionBits < 17; precisionBits++ {
+	for precisionBits := uint8(1); precisionBits < 14; precisionBits++ {
 		testMarshalUnmarshalInt64Array(t, va, precisionBits, MarshalTypeZSTDNearestDelta)
 	}
 	for precisionBits := uint8(23); precisionBits < 65; precisionBits++ {

lib/envflag/envflag.go

@@ -32,6 +32,11 @@ func ParseFlagSet(fs *flag.FlagSet, args []string) {
 		// Do not use lib/logger here, since it is uninitialized yet.
 		log.Fatalf("cannot parse flags %q: %s", args, err)
 	}
+	if fs.NArg() > 0 {
+		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4845
+		log.Fatalf("unprocessed command-line args left: %s; the most likely reason is missing `=` between boolean flag name and value; "+
+			"see https://pkg.go.dev/flag#hdr-Command_line_flag_syntax", fs.Args())
+	}
 	if !*enable {
 		return
 	}

lib/envtemplate/envtemplate.go

@@ -113,4 +113,7 @@ func isValidEnvVarName(s string) bool {
 	return envVarNameRegex.MatchString(s)
 }
 
-var envVarNameRegex = regexp.MustCompile("^[a-zA-Z0-9_]+$")
+// envVarNameRegex is used for validating environment variable names.
+//
+// Allow dashes and dots in env var names - see https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3999
+var envVarNameRegex = regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_\-.]*$`)

lib/envtemplate/envtemplate_test.go

@@ -24,7 +24,9 @@ func TestExpandTemplates(t *testing.T) {
 	f([]string{"foo=%{bar}", "bar=x"}, []string{"bar=x", "foo=x"})
 	f([]string{"a=x%{b}", "b=y%{c}z%{d}", "c=123", "d=qwe"}, []string{"a=xy123zqwe", "b=y123zqwe", "c=123", "d=qwe"})
 	f([]string{"a=x%{b}y", "b=z%{a}q", "c"}, []string{"a=xzxzxzxz%{a}qyqyqyqy", "b=zxzxzxzx%{b}yqyqyqyq", "c="})
-	f([]string{"a=%{x.y}"}, []string{"a=%{x.y}"})
+	f([]string{"a=%{x.y}", "x.y=test"}, []string{"a=test", "x.y=test"})
+	f([]string{"a=%{x y}"}, []string{"a=%{x y}"})
+	f([]string{"a=%{123}"}, []string{"a=%{123}"})
 }
 
 func TestLookupEnv(t *testing.T) {
@@ -49,7 +51,9 @@ func TestLookupEnv(t *testing.T) {
 
 func TestReplaceSuccess(t *testing.T) {
 	envVars = map[string]string{
-		"foo": "bar",
+		"foo":       "bar",
+		"foo.bar_1": "baz",
+		"foo-bar_2": "test",
 	}
 	f := func(s, resultExpected string) {
 		t.Helper()
@@ -71,7 +75,8 @@ func TestReplaceSuccess(t *testing.T) {
 	f("", "")
 	f("foo", "foo")
 	f("a %{foo}-x", "a bar-x")
-	f("%{foo.bar}", "%{foo.bar}")
+	f("%{foo.bar_1}", "baz")
+	f("qq.%{foo-bar_2}.ww", "qq.test.ww")
 }
 
 func TestReplaceFailure(t *testing.T) {
@@ -85,4 +90,7 @@ func TestReplaceFailure(t *testing.T) {
 		}
 	}
 	f("foo %{bar} %{baz}")
+	f("%{Foo_Foo_1}")
+	f("%{Foo-Bar-2}")
+	f("%{Foo.Baz.3}")
 }

lib/flagutil/array.go

@@ -59,16 +59,19 @@ func NewArrayBytes(name, description string) *ArrayBytes {
 //	-foo=value1 -foo=value2
 //	-foo=value1,value2
 //
-// Flag values may be quoted. For instance, the following arg creates an array of ("a", "b, c") items:
+// Each flag value may contain commas inside single quotes, double quotes, [], () or {} braces.
+// For example, -foo=[a,b,c] defines a single command-line flag with `[a,b,c]` value.
 //
-//	-foo='a,"b, c"'
+// Flag values may be quoted. For instance, the following arg creates an array of ("a", "b,c") items:
+//
+//	-foo='a,"b,c"'
 type ArrayString []string
 
 // String implements flag.Value interface
 func (a *ArrayString) String() string {
 	aEscaped := make([]string, len(*a))
 	for i, v := range *a {
-		if strings.ContainsAny(v, `", `+"\n") {
+		if strings.ContainsAny(v, `,'"{[(`+"\n") {
 			v = fmt.Sprintf("%q", v)
 		}
 		aEscaped[i] = v
@@ -94,55 +97,105 @@ func parseArrayValues(s string) []string {
 		if len(tail) == 0 {
 			return values
 		}
-		if tail[0] == ',' {
-			tail = tail[1:]
-		}
 		s = tail
+		if s[0] == ',' {
+			s = s[1:]
+		}
 	}
 }
 
+var closeQuotes = map[byte]byte{
+	'"':  '"',
+	'\'': '\'',
+	'[':  ']',
+	'{':  '}',
+	'(':  ')',
+}
+
 func getNextArrayValue(s string) (string, string) {
-	if len(s) == 0 {
-		return "", ""
+	v, tail := getNextArrayValueMaybeQuoted(s)
+	if strings.HasPrefix(v, `"`) && strings.HasSuffix(v, `"`) {
+		vUnquoted, err := strconv.Unquote(v)
+		if err == nil {
+			return vUnquoted, tail
+		}
+		v = v[1 : len(v)-1]
+		v = strings.ReplaceAll(v, `\"`, `"`)
+		v = strings.ReplaceAll(v, `\\`, `\`)
+		return v, tail
 	}
-	if s[0] != '"' {
-		// Fast path - unquoted string
-		n := strings.IndexByte(s, ',')
+	if strings.HasPrefix(v, `'`) && strings.HasSuffix(v, `'`) {
+		v = v[1 : len(v)-1]
+		v = strings.ReplaceAll(v, `\'`, "'")
+		v = strings.ReplaceAll(v, `\\`, `\`)
+		return v, tail
+	}
+	return v, tail
+}
+
+func getNextArrayValueMaybeQuoted(s string) (string, string) {
+	idx := 0
+	for {
+		n := strings.IndexAny(s[idx:], `,"'[{(`)
 		if n < 0 {
 			// The last item
 			return s, ""
 		}
-		return s[:n], s[n:]
+		idx += n
+		ch := s[idx]
+		if ch == ',' {
+			// The next item
+			return s[:idx], s[idx:]
+		}
+		idx++
+		m := indexCloseQuote(s[idx:], closeQuotes[ch])
+		idx += m
 	}
+}
 
-	// Find the end of quoted string
-	end := 1
-	ss := s[1:]
+func indexCloseQuote(s string, closeQuote byte) int {
+	if closeQuote == '"' || closeQuote == '\'' {
+		idx := 0
+		for {
+			n := strings.IndexByte(s[idx:], closeQuote)
+			if n < 0 {
+				return 0
+			}
+			idx += n
+			if n := getTrailingBackslashesCount(s[:idx]); n%2 == 1 {
+				// The quote is escaped with backslash. Skip it
+				idx++
+				continue
+			}
+			return idx + 1
+		}
+	}
+	idx := 0
 	for {
-		n := strings.IndexByte(ss, '"')
+		n := strings.IndexAny(s[idx:], `"'[{()}]`)
 		if n < 0 {
-			// Cannot find trailing quote. Return the whole string till the end.
-			return s, ""
+			return 0
 		}
-		end += n + 1
-		// Verify whether the trailing quote is escaped with backslash.
-		backslashes := 0
-		for n > backslashes && ss[n-backslashes-1] == '\\' {
-			backslashes++
+		idx += n
+		ch := s[idx]
+		if ch == closeQuote {
+			return idx + 1
 		}
-		if backslashes&1 == 0 {
-			// The trailing quote isn't escaped.
-			break
+		idx++
+		m := indexCloseQuote(s[idx:], closeQuotes[ch])
+		if m == 0 {
+			return 0
 		}
-		// The trailing quote is escaped. Continue searching for the next quote.
-		ss = ss[n+1:]
+		idx += m
 	}
-	v := s[:end]
-	vUnquoted, err := strconv.Unquote(v)
-	if err == nil {
-		v = vUnquoted
+}
+
+func getTrailingBackslashesCount(s string) int {
+	n := len(s)
+	for n > 0 && s[n-1] == '\\' {
+		n--
 	}
-	return v, s[end:]
+	return len(s) - n
 }
 
 // GetOptionalArg returns optional arg under the given argIdx.

lib/flagutil/array_test.go

@@ -53,15 +53,54 @@ func TestArrayString_Set(t *testing.T) {
 			t.Fatalf("unexpected values parsed;\ngot\n%q\nwant\n%q", a, expectedValues)
 		}
 	}
+	// Zero args
 	f("", nil)
+
+	// Single arg
 	f(`foo`, []string{`foo`})
-	f(`foo,b ar,baz`, []string{`foo`, `b ar`, `baz`})
-	f(`foo,b\"'ar,"baz,d`, []string{`foo`, `b\"'ar`, `"baz,d`})
-	f(`,foo,,ba"r,`, []string{``, `foo`, ``, `ba"r`, ``})
+	f(`fo"o`, []string{`fo"o`})
+	f(`fo'o`, []string{`fo'o`})
+	f(`fo{o`, []string{`fo{o`})
+	f(`fo[o`, []string{`fo[o`})
+	f(`fo(o`, []string{`fo(o`})
+
+	// Single arg with Prometheus label filters
+	f(`foo{bar="baz",x="y"}`, []string{`foo{bar="baz",x="y"}`})
+	f(`foo{bar="ba}z",x="y"}`, []string{`foo{bar="ba}z",x="y"}`})
+	f(`foo{bar='baz',x="y"}`, []string{`foo{bar='baz',x="y"}`})
+	f(`foo{bar='baz',x='y'}`, []string{`foo{bar='baz',x='y'}`})
+	f(`foo{bar='ba}z',x='y'}`, []string{`foo{bar='ba}z',x='y'}`})
+	f(`{foo="ba[r",baz='a'}`, []string{`{foo="ba[r",baz='a'}`})
+
+	// Single arg with JSON
+	f(`[1,2,3]`, []string{`[1,2,3]`})
+	f(`{"foo":"ba,r",baz:x}`, []string{`{"foo":"ba,r",baz:x}`})
+
+	// Single quoted arg
+	f(`"foo"`, []string{`foo`})
+	f(`"fo,'o"`, []string{`fo,'o`})
+	f(`"f\\o,\'\"o"`, []string{`f\o,\'"o`})
+	f(`"foo{bar='baz',x='y'}"`, []string{`foo{bar='baz',x='y'}`})
+	f(`'foo'`, []string{`foo`})
+	f(`'fo,"o'`, []string{`fo,"o`})
+	f(`'f\\o,\'\"o'`, []string{`f\o,'\"o`})
+	f(`'foo{bar="baz",x="y"}'`, []string{`foo{bar="baz",x="y"}`})
+
+	// Multiple args
+	f(`foo,bar,baz`, []string{`foo`, `bar`, `baz`})
+	f(`"foo",'bar',{[(ba'",z"`, []string{`foo`, `bar`, `{[(ba'",z"`})
+	f(`foo,b"'ar,"baz,d`, []string{`foo`, `b"'ar,"baz`, `d`})
+	f(`{foo="b,ar"},baz{x="y",z="d"}`, []string{`{foo="b,ar"}`, `baz{x="y",z="d"}`})
+
+	// Empty args
 	f(`""`, []string{``})
-	f(`"foo,b\nar"`, []string{`foo,b` + "\n" + `ar`})
-	f(`"foo","bar",baz`, []string{`foo`, `bar`, `baz`})
-	f(`,fo,"\"b, a'\\",,r,`, []string{``, `fo`, `"b, a'\`, ``, `r`, ``})
+	f(`''`, []string{``})
+	f(`,`, []string{``, ``})
+	f(`,foo,,ba"r,`, []string{``, `foo`, ``, `ba"r`, ``})
+
+	// Special chars inside double quotes
+	f(`"foo,b\nar"`, []string{"foo,b\nar"})
+	f(`"foo\x23bar"`, []string{"foo\x23bar"})
 }
 
 func TestArrayString_GetOptionalArg(t *testing.T) {
@@ -100,6 +139,7 @@ func TestArrayString_String(t *testing.T) {
 	f(",foo,")
 	f(`", foo","b\"ar",`)
 	f(`,"\nfoo\\",bar`)
+	f(`"foo{bar=~\"baz\",a!=\"b\"}","{a='b,{[(c'}"`)
 }
 
 func TestArrayDuration(t *testing.T) {

lib/fs/fs.go

@@ -262,7 +262,7 @@ func MustRemoveTemporaryDirs(dir string) {
 			continue
 		}
 		dirName := fi.Name()
-		if strings.Contains(dirName, ".must-remove.") {
+		if IsScheduledForRemoval(dirName) {
 			fullPath := dir + "/" + dirName
 			MustRemoveAll(fullPath)
 		}
@@ -441,6 +441,12 @@ func ReadFileOrHTTP(path string) ([]byte, error) {
 		}
 		data, err := io.ReadAll(resp.Body)
 		_ = resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			if len(data) > 4*1024 {
+				data = data[:4*1024]
+			}
+			return nil, fmt.Errorf("unexpected status code when fetching %q: %d, expecting %d; response: %q", path, resp.StatusCode, http.StatusOK, data)
+		}
 		if err != nil {
 			return nil, fmt.Errorf("cannot read %q: %s", path, err)
 		}
@@ -467,3 +473,7 @@ func isHTTPURL(targetURL string) bool {
 	return err == nil && (parsed.Scheme == "http" || parsed.Scheme == "https") && parsed.Host != ""
 
 }
+
+func IsScheduledForRemoval(name string) bool {
+	return strings.Contains(name, ".must-remove.")
+}

lib/fs/reader_at.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"sync/atomic"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 	"github.com/VictoriaMetrics/metrics"
@@ -27,8 +28,13 @@ type MustReadAtCloser interface {
 
 // ReaderAt implements rand-access reader.
 type ReaderAt struct {
+	readCalls uint64
+	readBytes uint64
+
 	f        *os.File
 	mmapData []byte
+
+	useLocalStats bool
 }
 
 // MustReadAt reads len(p) bytes at off from r.
@@ -56,8 +62,13 @@ func (r *ReaderAt) MustReadAt(p []byte, off int64) {
 		// But production workload proved this is OK in most cases, so use it without fear :)
 		copy(p, src)
 	}
-	readCalls.Inc()
-	readBytes.Add(len(p))
+	if r.useLocalStats {
+		atomic.AddUint64(&r.readCalls, 1)
+		atomic.AddUint64(&r.readBytes, uint64(len(p)))
+	} else {
+		readCalls.Inc()
+		readBytes.Add(len(p))
+	}
 }
 
 // MustClose closes r.
@@ -71,9 +82,28 @@ func (r *ReaderAt) MustClose() {
 	}
 	MustClose(r.f)
 	r.f = nil
+
+	if r.useLocalStats {
+		readCalls.Add(int(r.readCalls))
+		readBytes.Add(int(r.readBytes))
+		r.readCalls = 0
+		r.readBytes = 0
+		r.useLocalStats = false
+	}
 	readersCount.Dec()
 }
 
+// SetUseLocalStats switches to local stats collection instead of global stats collection.
+//
+// This function must be called before the first call to MustReadAt().
+//
+// Collecting local stats may improve performance on systems with big number of CPU cores,
+// since the locally collected stats is pushed to global stats only at MustClose() call
+// instead of pushing it at every MustReadAt call.
+func (r *ReaderAt) SetUseLocalStats() {
+	r.useLocalStats = true
+}
+
 // MustFadviseSequentialRead hints the OS that f is read mostly sequentially.
 //
 // if prefetch is set, then the OS is hinted to prefetch f data.

lib/httpserver/httpserver.go

@@ -320,6 +320,11 @@ func handlerWrapper(s *server, w http.ResponseWriter, r *http.Request, rh Reques
 		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1833
 		fmt.Fprintf(w, "VictoriaMetrics is Ready.\n")
 		return
+	case "/robots.txt":
+		// This prevents search engines from indexing contents
+		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4128
+		fmt.Fprintf(w, "User-agent: *\nDisallow: /\n")
+		return
 	default:
 		if strings.HasPrefix(r.URL.Path, "/debug/pprof/") {
 			pprofRequests.Inc()

lib/mergeset/table.go

@@ -662,35 +662,20 @@ func (tb *Table) flushInmemoryItems() {
 }
 
 func (tb *Table) flushInmemoryParts(isFinal bool) {
-	for {
-		currentTime := time.Now()
-		var pws []*partWrapper
+	currentTime := time.Now()
+	var pws []*partWrapper
 
-		tb.partsLock.Lock()
-		for _, pw := range tb.inmemoryParts {
-			if !pw.isInMerge && (isFinal || pw.flushToDiskDeadline.Before(currentTime)) {
-				pw.isInMerge = true
-				pws = append(pws, pw)
-			}
+	tb.partsLock.Lock()
+	for _, pw := range tb.inmemoryParts {
+		if !pw.isInMerge && (isFinal || pw.flushToDiskDeadline.Before(currentTime)) {
+			pw.isInMerge = true
+			pws = append(pws, pw)
 		}
-		tb.partsLock.Unlock()
+	}
+	tb.partsLock.Unlock()
 
-		if err := tb.mergePartsOptimal(pws); err != nil {
-			logger.Panicf("FATAL: cannot merge in-memory parts: %s", err)
-		}
-		if !isFinal {
-			return
-		}
-		tb.partsLock.Lock()
-		n := len(tb.inmemoryParts)
-		tb.partsLock.Unlock()
-		if n == 0 {
-			// All the in-memory parts were flushed to disk.
-			return
-		}
-		// Some parts weren't flushed to disk because they were being merged.
-		// Sleep for a while and try flushing them again.
-		time.Sleep(10 * time.Millisecond)
+	if err := tb.mergePartsOptimal(pws); err != nil {
+		logger.Panicf("FATAL: cannot merge in-memory parts: %s", err)
 	}
 }
 
@@ -788,7 +773,18 @@ func (tb *Table) notifyBackgroundMergers() bool {
 	}
 }
 
-var flushConcurrencyCh = make(chan struct{}, cgroup.AvailableCPUs())
+var flushConcurrencyLimit = func() int {
+	n := cgroup.AvailableCPUs()
+	if n < 2 {
+		// Allow at least 2 concurrent flushers on systems with a single CPU core
+		// in order to guarantee that in-memory data flushes and background merges can be continued
+		// when a single flusher is busy with the long merge.
+		n = 2
+	}
+	return n
+}()
+
+var flushConcurrencyCh = make(chan struct{}, flushConcurrencyLimit)
 
 func needAssistedMerge(pws []*partWrapper, maxParts int) bool {
 	if len(pws) < maxParts {
@@ -927,10 +923,8 @@ func newPartWrapperFromInmemoryPart(mp *inmemoryPart, flushToDiskDeadline time.T
 }
 
 func (tb *Table) startMergeWorkers() {
-	// Start a merge worker per available CPU core.
 	// The actual number of concurrent merges is limited inside mergeWorker() below.
-	workersCount := cgroup.AvailableCPUs()
-	for i := 0; i < workersCount; i++ {
+	for i := 0; i < cap(mergeWorkersLimitCh); i++ {
 		tb.wg.Add(1)
 		go func() {
 			tb.mergeWorker()
@@ -1153,14 +1147,6 @@ func (tb *Table) mergeParts(pws []*partWrapper, stopCh <-chan struct{}, isFinal
 	if err != nil {
 		return fmt.Errorf("cannot atomically register the created part: %w", err)
 	}
-	tb.swapSrcWithDstParts(pws, pwNew, dstPartType)
-
-	d := time.Since(startTime)
-	if d <= 30*time.Second {
-		return nil
-	}
-
-	// Log stats for long merges.
 	dstItemsCount := uint64(0)
 	dstBlocksCount := uint64(0)
 	dstSize := uint64(0)
@@ -1172,6 +1158,15 @@ func (tb *Table) mergeParts(pws []*partWrapper, stopCh <-chan struct{}, isFinal
 		dstSize = pDst.size
 		dstPartPath = pDst.path
 	}
+
+	tb.swapSrcWithDstParts(pws, pwNew, dstPartType)
+
+	d := time.Since(startTime)
+	if d <= 30*time.Second {
+		return nil
+	}
+
+	// Log stats for long merges.
 	durationSecs := d.Seconds()
 	itemsPerSec := int(float64(srcItemsCount) / durationSecs)
 	logger.Infof("merged (%d parts, %d items, %d blocks, %d bytes) into (1 part, %d items, %d blocks, %d bytes) in %.3f seconds at %d items/sec to %q",
@@ -1406,7 +1401,18 @@ func (tb *Table) nextMergeIdx() uint64 {
 	return atomic.AddUint64(&tb.mergeIdx, 1)
 }
 
-var mergeWorkersLimitCh = make(chan struct{}, cgroup.AvailableCPUs())
+var mergeWorkersLimitCh = make(chan struct{}, getWorkersCount())
+
+func getWorkersCount() int {
+	n := cgroup.AvailableCPUs()
+	if n < 4 {
+		// Allow at least 4 merge workers on systems with small CPUs count
+		// in order to guarantee that background merges can be continued
+		// when multiple workers are busy with big merges.
+		n = 4
+	}
+	return n
+}
 
 func openParts(path string) ([]*partWrapper, error) {
 	// The path can be missing after restoring from backup, so create it if needed.
@@ -1824,5 +1830,5 @@ func removeParts(pws []*partWrapper, partsToRemove map[*partWrapper]bool) ([]*pa
 func isSpecialDir(name string) bool {
 	// Snapshots and cache dirs aren't used anymore.
 	// Keep them here for backwards compatibility.
-	return name == "tmp" || name == "txn" || name == "snapshots" || name == "cache"
+	return name == "tmp" || name == "txn" || name == "snapshots" || name == "cache" || fs.IsScheduledForRemoval(name)
 }

lib/mergeset/table_test.go

@@ -129,16 +129,12 @@ func TestTableCreateSnapshotAt(t *testing.T) {
 	if err := os.RemoveAll(path); err != nil {
 		t.Fatalf("cannot remove %q: %s", path, err)
 	}
-	defer func() {
-		_ = os.RemoveAll(path)
-	}()
 
 	var isReadOnly uint32
 	tb, err := OpenTable(path, nil, nil, &isReadOnly)
 	if err != nil {
 		t.Fatalf("cannot open %q: %s", path, err)
 	}
-	defer tb.MustClose()
 
 	// Write a lot of items into the table, so background merges would start.
 	const itemsCount = 3e5
@@ -146,7 +142,14 @@ func TestTableCreateSnapshotAt(t *testing.T) {
 		item := []byte(fmt.Sprintf("item %d", i))
 		tb.AddItems([][]byte{item})
 	}
-	tb.DebugFlush()
+
+	// Close and open the table in order to flush all the data to disk before creating snapshots.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4272#issuecomment-1550221840
+	tb.MustClose()
+	tb, err = OpenTable(path, nil, nil, &isReadOnly)
+	if err != nil {
+		t.Fatalf("cannot open %q: %s", path, err)
+	}
 
 	// Create multiple snapshots.
 	snapshot1 := path + "-test-snapshot1"
@@ -157,30 +160,22 @@ func TestTableCreateSnapshotAt(t *testing.T) {
 	if err := tb.CreateSnapshotAt(snapshot2); err != nil {
 		t.Fatalf("cannot create snapshot2: %s", err)
 	}
-	defer func() {
-		_ = os.RemoveAll(snapshot1)
-		_ = os.RemoveAll(snapshot2)
-	}()
 
 	// Verify snapshots contain all the data.
 	tb1, err := OpenTable(snapshot1, nil, nil, &isReadOnly)
 	if err != nil {
 		t.Fatalf("cannot open %q: %s", path, err)
 	}
-	defer tb1.MustClose()
 
 	tb2, err := OpenTable(snapshot2, nil, nil, &isReadOnly)
 	if err != nil {
 		t.Fatalf("cannot open %q: %s", path, err)
 	}
-	defer tb2.MustClose()
 
 	var ts, ts1, ts2 TableSearch
 	ts.Init(tb)
 	ts1.Init(tb1)
-	defer ts1.MustClose()
 	ts2.Init(tb2)
-	defer ts2.MustClose()
 	for i := 0; i < itemsCount; i++ {
 		key := []byte(fmt.Sprintf("item %d", i))
 		if err := ts.FirstItemWithPrefix(key); err != nil {
@@ -202,6 +197,17 @@ func TestTableCreateSnapshotAt(t *testing.T) {
 			t.Fatalf("unexpected item found for key=%q in snapshot2; got %q", key, ts2.Item)
 		}
 	}
+	ts1.MustClose()
+	ts2.MustClose()
+
+	// Close and remove tables.
+	tb2.MustClose()
+	tb1.MustClose()
+	tb.MustClose()
+
+	_ = os.RemoveAll(snapshot2)
+	_ = os.RemoveAll(snapshot1)
+	_ = os.RemoveAll(path)
 }
 
 func TestTableAddItemsConcurrent(t *testing.T) {

lib/netutil/proxyprotocol.go

@@ -71,9 +71,14 @@ func readProxyProto(r io.Reader) (net.Addr, error) {
 	if version != 2 {
 		return nil, fmt.Errorf("unsupported proxy protocol version, only v2 protocol version is supported, got: %d", version)
 	}
-	if proto != 1 {
-		// Only TCP is supported (aka STREAM).
-		return nil, fmt.Errorf("the proxy protocol implementation doesn't support proto %d; expecting 1", proto)
+	// check for supported proto:
+	switch {
+	case proto == 0 && command == 0:
+		// 0 - UNSPEC with LOCAL command 0. Common use case for load balancer health checks.
+	case proto == 1:
+		// 1 - TCP (aka STREAM).
+	default:
+		return nil, fmt.Errorf("the proxy protocol implementation doesn't support proto %d and command: %d; expecting proto 1 or proto 0 with command 0", proto, command)
 	}
 	// The length of the remainder of the header including any TLVs in network byte order
 	// 0, 1, 2

lib/netutil/tcplistener.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"io"
 	"net"
 	"time"
 
@@ -78,6 +79,8 @@ type TCPListener struct {
 	connMetrics
 }
 
+var proxyProtocolReadErrorLogger = logger.WithThrottler("proxyProtocolReadError", 5*time.Second)
+
 // Accept accepts connections from the addr passed to NewTCPListener.
 func (ln *TCPListener) Accept() (net.Conn, error) {
 	for {
@@ -94,10 +97,15 @@ func (ln *TCPListener) Accept() (net.Conn, error) {
 			return nil, err
 		}
 		if ln.useProxyProtocol {
-			conn, err = newProxyProtocolConn(conn)
+			pConn, err := newProxyProtocolConn(conn)
 			if err != nil {
-				return nil, err
+				if !errors.Is(err, io.EOF) {
+					proxyProtocolReadErrorLogger.Errorf("cannot read proxy proto conn for TCP addr %q: %s", ln.Addr(), err)
+				}
+				_ = conn.Close()
+				continue
 			}
+			conn = pConn
 		}
 		ln.conns.Inc()
 		sc := &statConn{

lib/persistentqueue/persistentqueue.go

@@ -202,7 +202,13 @@ func tryOpeningQueue(path, name string, chunkFileSize, maxBlockSize, maxPendingB
 		}
 
 		// path contents is broken or missing. Re-create it from scratch.
+		fs.MustClose(q.flockF)
 		fs.RemoveDirContents(path)
+		flockF, err := fs.CreateFlockFile(path)
+		if err != nil {
+			logger.Panicf("FATAL: cannot create flock file: %s", err)
+		}
+		q.flockF = flockF
 		mi.Reset()
 		mi.Name = q.name
 		if err := mi.WriteToFile(metainfoPath); err != nil {

lib/promrelabel/relabel.go

@@ -158,7 +158,7 @@ func FinalizeLabels(dst, src []prompbmarshal.Label) []prompbmarshal.Label {
 // See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config
 func (prc *parsedRelabelConfig) apply(labels []prompbmarshal.Label, labelsOffset int) []prompbmarshal.Label {
 	src := labels[labelsOffset:]
-	if !prc.If.Match(labels) {
+	if !prc.If.Match(src) {
 		if prc.Action == "keep" {
 			// Drop the target on `if` mismatch for `action: keep`
 			return labels[:labelsOffset]
@@ -619,15 +619,28 @@ func fillLabelReferences(dst []byte, replacement string, labels []prompbmarshal.
 	return dst
 }
 
-// SanitizeName replaces unsupported by Prometheus chars in metric names and label names with _.
+// SanitizeLabelName replaces unsupported by Prometheus chars in label names with _.
 //
 // See https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels
-func SanitizeName(name string) string {
-	return promSanitizer.Transform(name)
+func SanitizeLabelName(name string) string {
+	return labelNameSanitizer.Transform(name)
 }
 
-var promSanitizer = bytesutil.NewFastStringTransformer(func(s string) string {
-	return unsupportedPromChars.ReplaceAllString(s, "_")
+var labelNameSanitizer = bytesutil.NewFastStringTransformer(func(s string) string {
+	return unsupportedLabelNameChars.ReplaceAllString(s, "_")
 })
 
-var unsupportedPromChars = regexp.MustCompile(`[^a-zA-Z0-9_:]`)
+var unsupportedLabelNameChars = regexp.MustCompile(`[^a-zA-Z0-9_]`)
+
+// SanitizeMetricName replaces unsupported by Prometheus chars in metric names with _.
+//
+// See https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels
+func SanitizeMetricName(value string) string {
+	return metricNameSanitizer.Transform(value)
+}
+
+var metricNameSanitizer = bytesutil.NewFastStringTransformer(func(s string) string {
+	return unsupportedMetricNameChars.ReplaceAllString(s, "_")
+})
+
+var unsupportedMetricNameChars = regexp.MustCompile(`[^a-zA-Z0-9_:]`)

lib/promrelabel/relabel_test.go

@@ -9,13 +9,13 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
 )
 
-func TestSanitizeName(t *testing.T) {
+func TestSanitizeMetricName(t *testing.T) {
 	f := func(s, resultExpected string) {
 		t.Helper()
 		for i := 0; i < 5; i++ {
-			result := SanitizeName(s)
+			result := SanitizeMetricName(s)
 			if result != resultExpected {
-				t.Fatalf("unexpected result for SanitizeName(%q) at iteration %d; got %q; want %q", s, i, result, resultExpected)
+				t.Fatalf("unexpected result for SanitizeMetricName(%q) at iteration %d; got %q; want %q", s, i, result, resultExpected)
 			}
 		}
 	}
@@ -25,6 +25,22 @@ func TestSanitizeName(t *testing.T) {
 	f("foo...bar", "foo___bar")
 }
 
+func TestSanitizeLabelName(t *testing.T) {
+	f := func(s, resultExpected string) {
+		t.Helper()
+		for i := 0; i < 5; i++ {
+			result := SanitizeLabelName(s)
+			if result != resultExpected {
+				t.Fatalf("unexpected result for SanitizeLabelName(%q) at iteration %d; got %q; want %q", s, i, result, resultExpected)
+			}
+		}
+	}
+	f("", "")
+	f("a", "a")
+	f("foo.bar/baz:a", "foo_bar_baz_a")
+	f("foo...bar", "foo___bar")
+}
+
 func TestLabelsToString(t *testing.T) {
 	f := func(labels []prompbmarshal.Label, sExpected string) {
 		t.Helper()

lib/promrelabel/relabel_timing_test.go

@@ -8,20 +8,39 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
 )
 
-func BenchmarkSanitizeName(b *testing.B) {
+func BenchmarkSanitizeMetricName(b *testing.B) {
 	for _, name := range []string{"", "foo", "foo-bar-baz", "http_requests_total"} {
 		b.Run(name, func(b *testing.B) {
-			benchmarkSanitizeName(b, name)
+			benchmarkSanitizeMetricName(b, name)
 		})
 	}
 }
 
-func benchmarkSanitizeName(b *testing.B, name string) {
+func benchmarkSanitizeMetricName(b *testing.B, name string) {
 	b.ReportAllocs()
 	b.SetBytes(1)
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			sanitizedName := SanitizeName(name)
+			sanitizedName := SanitizeMetricName(name)
+			GlobalSink += len(sanitizedName)
+		}
+	})
+}
+
+func BenchmarkSanitizeLabelName(b *testing.B) {
+	for _, name := range []string{"", "foo", "foo-bar-baz", "http_requests_total"} {
+		b.Run(name, func(b *testing.B) {
+			benchmarkSanitizeLabelName(b, name)
+		})
+	}
+}
+
+func benchmarkSanitizeLabelName(b *testing.B, name string) {
+	b.ReportAllocs()
+	b.SetBytes(1)
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			sanitizedName := SanitizeLabelName(name)
 			GlobalSink += len(sanitizedName)
 		}
 	})

lib/promscrape/client.go

@@ -14,6 +14,7 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/proxy"
 	"github.com/VictoriaMetrics/fasthttp"
 	"github.com/VictoriaMetrics/metrics"
@@ -262,7 +263,11 @@ func (c *client) ReadData(dst []byte) ([]byte, error) {
 		// This should reduce memory uage when scraping big targets.
 		dst = resp.SwapBody(dst)
 	}
-	err := doRequestWithPossibleRetry(c.hc, req, resp, deadline)
+
+	ctx, cancel := context.WithDeadline(c.ctx, deadline)
+	defer cancel()
+
+	err := doRequestWithPossibleRetry(ctx, c.hc, req, resp)
 	statusCode := resp.StatusCode()
 	redirectsCount := 0
 	for err == nil && isStatusRedirect(statusCode) {
@@ -282,7 +287,7 @@ func (c *client) ReadData(dst []byte) ([]byte, error) {
 			break
 		}
 		req.URI().UpdateBytes(location)
-		err = doRequestWithPossibleRetry(c.hc, req, resp, deadline)
+		err = doRequestWithPossibleRetry(ctx, c.hc, req, resp)
 		statusCode = resp.StatusCode()
 		redirectsCount++
 	}
@@ -349,32 +354,45 @@ var (
 	scrapeRetries         = metrics.NewCounter(`vm_promscrape_scrape_retries_total`)
 )
 
-func doRequestWithPossibleRetry(hc *fasthttp.HostClient, req *fasthttp.Request, resp *fasthttp.Response, deadline time.Time) error {
-	sleepTime := time.Second
+func doRequestWithPossibleRetry(ctx context.Context, hc *fasthttp.HostClient, req *fasthttp.Request, resp *fasthttp.Response) error {
 	scrapeRequests.Inc()
-	for {
-		// Use DoDeadline instead of Do even if hc.ReadTimeout is already set in order to guarantee the given deadline
-		// across multiple retries.
-		err := hc.DoDeadline(req, resp, deadline)
-		if err == nil {
+
+	var reqErr error
+	// Return true if the request execution is completed and retry is not required
+	attempt := func() bool {
+		// Use DoCtx instead of Do in order to support context cancellation
+		reqErr = hc.DoCtx(ctx, req, resp)
+		if reqErr == nil {
 			statusCode := resp.StatusCode()
 			if statusCode != fasthttp.StatusTooManyRequests {
-				return nil
+				return true
 			}
-		} else if err != fasthttp.ErrConnectionClosed && !strings.Contains(err.Error(), "broken pipe") {
-			return err
+		} else if reqErr != fasthttp.ErrConnectionClosed && !strings.Contains(reqErr.Error(), "broken pipe") {
+			return true
 		}
-		// Retry request after exponentially increased sleep.
-		maxSleepTime := time.Until(deadline)
-		if sleepTime > maxSleepTime {
-			return fmt.Errorf("the server closes all the connection attempts: %w", err)
+		return false
+	}
+
+	if attempt() {
+		return reqErr
+	}
+
+	// The first attempt was unsuccessful. Use exponential backoff for further attempts.
+	// Perform the second attempt immediately after the first attempt - this should help
+	// in cases when the remote side closes the keep-alive connection before the first attempt.
+	// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3293
+	sleepTime := time.Second
+	// It is expected that the deadline is already set to ctx, so the loop below
+	// should eventually finish if all the attempt() calls are unsuccessful.
+	for {
+		scrapeRetries.Inc()
+		if attempt() {
+			return reqErr
 		}
 		sleepTime += sleepTime
-		if sleepTime > maxSleepTime {
-			sleepTime = maxSleepTime
+		if !discoveryutils.SleepCtx(ctx, sleepTime) {
+			return reqErr
 		}
-		time.Sleep(sleepTime)
-		scrapeRetries.Inc()
 	}
 }
 

lib/promscrape/config.go

@@ -242,7 +242,7 @@ type ScrapeConfig struct {
 	ScrapeTimeout        *promutils.Duration         `yaml:"scrape_timeout,omitempty"`
 	MetricsPath          string                      `yaml:"metrics_path,omitempty"`
 	HonorLabels          bool                        `yaml:"honor_labels,omitempty"`
-	HonorTimestamps      *bool                       `yaml:"honor_timestamps,omitempty"`
+	HonorTimestamps      bool                        `yaml:"honor_timestamps,omitempty"`
 	FollowRedirects      *bool                       `yaml:"follow_redirects,omitempty"`
 	Scheme               string                      `yaml:"scheme,omitempty"`
 	Params               map[string][]string         `yaml:"params,omitempty"`
@@ -706,21 +706,11 @@ func (cfg *Config) getEurekaSDScrapeWork(prev []*ScrapeWork) []*ScrapeWork {
 
 // getFileSDScrapeWork returns `file_sd_configs` ScrapeWork from cfg.
 func (cfg *Config) getFileSDScrapeWork(prev []*ScrapeWork) []*ScrapeWork {
-	// Create a map for the previous scrape work.
-	swsMapPrev := make(map[string][]*ScrapeWork)
-	for _, sw := range prev {
-		filepath := sw.Labels.Get("__vm_filepath")
-		if len(filepath) == 0 {
-			logger.Panicf("BUG: missing `__vm_filepath` label")
-		} else {
-			swsMapPrev[filepath] = append(swsMapPrev[filepath], sw)
-		}
-	}
 	dst := make([]*ScrapeWork, 0, len(prev))
 	for _, sc := range cfg.ScrapeConfigs {
 		for j := range sc.FileSDConfigs {
 			sdc := &sc.FileSDConfigs[j]
-			dst = sdc.appendScrapeWork(dst, swsMapPrev, cfg.baseDir, sc.swc)
+			dst = sdc.appendScrapeWork(dst, cfg.baseDir, sc.swc)
 		}
 	}
 	return dst
@@ -931,10 +921,7 @@ func getScrapeWorkConfig(sc *ScrapeConfig, baseDir string, globalCfg *GlobalConf
 		scrapeTimeout = scrapeInterval
 	}
 	honorLabels := sc.HonorLabels
-	honorTimestamps := true
-	if sc.HonorTimestamps != nil {
-		honorTimestamps = *sc.HonorTimestamps
-	}
+	honorTimestamps := sc.HonorTimestamps
 	denyRedirects := false
 	if sc.FollowRedirects != nil {
 		denyRedirects = !*sc.FollowRedirects
@@ -1090,7 +1077,7 @@ func appendScrapeWorkForTargetLabels(dst []*ScrapeWork, swc *scrapeWorkConfig, t
 	return dst
 }
 
-func (sdc *FileSDConfig) appendScrapeWork(dst []*ScrapeWork, swsMapPrev map[string][]*ScrapeWork, baseDir string, swc *scrapeWorkConfig) []*ScrapeWork {
+func (sdc *FileSDConfig) appendScrapeWork(dst []*ScrapeWork, baseDir string, swc *scrapeWorkConfig) []*ScrapeWork {
 	metaLabels := promutils.GetLabels()
 	defer promutils.PutLabels(metaLabels)
 	for _, file := range sdc.Files {
@@ -1101,7 +1088,7 @@ func (sdc *FileSDConfig) appendScrapeWork(dst []*ScrapeWork, swsMapPrev map[stri
 			paths, err = filepath.Glob(pathPattern)
 			if err != nil {
 				// Do not return this error, since other files may contain valid scrape configs.
-				logger.Errorf("invalid pattern %q in `files` section: %s; skipping it", file, err)
+				logger.Errorf("invalid pattern %q in `file_sd_config->files` section of job_name=%q: %s; skipping it", file, swc.jobName, err)
 				continue
 			}
 		}
@@ -1109,13 +1096,7 @@ func (sdc *FileSDConfig) appendScrapeWork(dst []*ScrapeWork, swsMapPrev map[stri
 			stcs, err := loadStaticConfigs(path)
 			if err != nil {
 				// Do not return this error, since other paths may contain valid scrape configs.
-				if sws := swsMapPrev[path]; sws != nil {
-					// Re-use the previous valid scrape work for this path.
-					logger.Errorf("keeping the previously loaded `static_configs` from %q because of error when re-loading the file: %s", path, err)
-					dst = append(dst, sws...)
-				} else {
-					logger.Errorf("skipping loading `static_configs` from %q because of error: %s", path, err)
-				}
+				logger.Errorf("cannot load file %q for job_name=%q at `file_sd_configs`: %s; skipping this file", path, swc.jobName, err)
 				continue
 			}
 			pathShort := path
@@ -1127,7 +1108,6 @@ func (sdc *FileSDConfig) appendScrapeWork(dst []*ScrapeWork, swsMapPrev map[stri
 			}
 			metaLabels.Reset()
 			metaLabels.Add("__meta_filepath", pathShort)
-			metaLabels.Add("__vm_filepath", path) // This label is needed for internal promscrape logic
 			for i := range stcs {
 				dst = stcs[i].appendScrapeWork(dst, swc, metaLabels)
 			}

lib/promscrape/config_test.go

@@ -89,7 +89,7 @@ scrape_configs:
 scrape_configs:
 - job_name: foo
   honor_labels: true
-  honor_timestamps: false
+  honor_timestamps: true
   scheme: https
   params:
     foo:
@@ -243,10 +243,9 @@ scrape_configs:
 	resetNonEssentialFields(sws)
 	swsExpected := []*ScrapeWork{
 		{
-			ScrapeURL:       "http://host1:80/metric/path1?x=y",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://host1:80/metric/path1?x=y",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "host1:80",
 				"job":      "abc",
@@ -256,10 +255,9 @@ scrape_configs:
 			jobNameOriginal: "abc",
 		},
 		{
-			ScrapeURL:       "https://host2:443/metric/path2?x=y",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "https://host2:443/metric/path2?x=y",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "host2:443",
 				"job":      "abc",
@@ -269,10 +267,9 @@ scrape_configs:
 			jobNameOriginal: "abc",
 		},
 		{
-			ScrapeURL:       "http://host3:1234/metric/path3?arg1=value1&x=y",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://host3:1234/metric/path3?arg1=value1&x=y",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "host3:1234",
 				"job":      "abc",
@@ -282,10 +279,9 @@ scrape_configs:
 			jobNameOriginal: "abc",
 		},
 		{
-			ScrapeURL:       "https://host4:1234/foo/bar?x=y",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "https://host4:1234/foo/bar?x=y",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "host4:1234",
 				"job":      "abc",
@@ -330,10 +326,9 @@ scrape_configs:
 	sws := cfg.getStaticScrapeWork()
 	resetNonEssentialFields(sws)
 	swsExpected := []*ScrapeWork{{
-		ScrapeURL:       "http://black:9115/probe?module=dns_udp_example&target=8.8.8.8",
-		ScrapeInterval:  defaultScrapeInterval,
-		ScrapeTimeout:   defaultScrapeTimeout,
-		HonorTimestamps: true,
+		ScrapeURL:      "http://black:9115/probe?module=dns_udp_example&target=8.8.8.8",
+		ScrapeInterval: defaultScrapeInterval,
+		ScrapeTimeout:  defaultScrapeTimeout,
 		Labels: promutils.NewLabelsFromMap(map[string]string{
 			"instance": "8.8.8.8",
 			"job":      "blackbox",
@@ -739,16 +734,6 @@ func TestGetFileSDScrapeWorkSuccess(t *testing.T) {
 		}
 		resetNonEssentialFields(sws)
 
-		// Remove `__vm_filepath` label, since its value depends on the current working dir.
-		for _, sw := range sws {
-			labels := sw.Labels.GetLabels()
-			for j := range labels {
-				label := &labels[j]
-				if label.Name == "__vm_filepath" {
-					label.Value = ""
-				}
-			}
-		}
 		if !reflect.DeepEqual(sws, expectedSws) {
 			t.Fatalf("unexpected scrapeWork; got\n%+v\nwant\n%+v", sws, expectedSws)
 		}
@@ -767,45 +752,39 @@ scrape_configs:
   - files: ["testdata/file_sd.json", "testdata/file_sd*.yml"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://host1:80/abc/de",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://host1:80/abc/de",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
-				"__vm_filepath": "",
-				"instance":      "host1:80",
-				"job":           "foo",
-				"qwe":           "rty",
+				"instance": "host1:80",
+				"job":      "foo",
+				"qwe":      "rty",
 			}),
 			AuthConfig:      &promauth.Config{},
 			ProxyAuthConfig: &promauth.Config{},
 			jobNameOriginal: "foo",
 		},
 		{
-			ScrapeURL:       "http://host2:80/abc/de",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://host2:80/abc/de",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
-				"__vm_filepath": "",
-				"instance":      "host2:80",
-				"job":           "foo",
-				"qwe":           "rty",
+				"instance": "host2:80",
+				"job":      "foo",
+				"qwe":      "rty",
 			}),
 			AuthConfig:      &promauth.Config{},
 			ProxyAuthConfig: &promauth.Config{},
 			jobNameOriginal: "foo",
 		},
 		{
-			ScrapeURL:       "http://localhost:9090/abc/de",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://localhost:9090/abc/de",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
-				"__vm_filepath": "",
-				"instance":      "localhost:9090",
-				"job":           "foo",
-				"yml":           "test",
+				"instance": "localhost:9090",
+				"job":      "foo",
+				"yml":      "test",
 			}),
 			AuthConfig:      &promauth.Config{},
 			ProxyAuthConfig: &promauth.Config{},
@@ -834,10 +813,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "foo",
@@ -858,10 +836,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "foo",
@@ -886,7 +863,7 @@ scrape_configs:
   metrics_path: /foo/bar
   scheme: https
   honor_labels: true
-  honor_timestamps: false
+  honor_timestamps: true
   follow_redirects: false
   params:
     p: ["x&y", "="]
@@ -912,7 +889,7 @@ scrape_configs:
 			ScrapeInterval:  54 * time.Second,
 			ScrapeTimeout:   5 * time.Second,
 			HonorLabels:     true,
-			HonorTimestamps: false,
+			HonorTimestamps: true,
 			DenyRedirects:   true,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:443",
@@ -929,7 +906,7 @@ scrape_configs:
 			ScrapeInterval:  54 * time.Second,
 			ScrapeTimeout:   5 * time.Second,
 			HonorLabels:     true,
-			HonorTimestamps: false,
+			HonorTimestamps: true,
 			DenyRedirects:   true,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "aaa:443",
@@ -942,10 +919,9 @@ scrape_configs:
 			jobNameOriginal: "foo",
 		},
 		{
-			ScrapeURL:       "http://1.2.3.4:80/metrics",
-			ScrapeInterval:  8 * time.Second,
-			ScrapeTimeout:   8 * time.Second,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://1.2.3.4:80/metrics",
+			ScrapeInterval: 8 * time.Second,
+			ScrapeTimeout:  8 * time.Second,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "1.2.3.4:80",
 				"job":      "qwer",
@@ -958,10 +934,9 @@ scrape_configs:
 			jobNameOriginal: "qwer",
 		},
 		{
-			ScrapeURL:       "http://foobar:80/metrics",
-			ScrapeInterval:  8 * time.Second,
-			ScrapeTimeout:   8 * time.Second,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foobar:80/metrics",
+			ScrapeInterval: 8 * time.Second,
+			ScrapeTimeout:  8 * time.Second,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foobar:80",
 				"job":      "asdf",
@@ -1008,10 +983,9 @@ scrape_configs:
   - targets: ["foo.bar:1234", "drop-this-target"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics?x=keep_me",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics?x=keep_me",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"hash":       "82",
 				"instance":   "foo.bar:1234",
@@ -1052,10 +1026,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "mailto://foo.bar:1234/abc.de?a=b",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "mailto://foo.bar:1234/abc.de?a=b",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "fake.addr",
 				"job":      "https",
@@ -1087,10 +1060,9 @@ scrape_configs:
   - targets: ["foo.bar:1234", "xyz"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "3",
@@ -1111,10 +1083,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "foo",
@@ -1131,10 +1102,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "foo",
@@ -1151,10 +1121,9 @@ scrape_configs:
   - targets: ["foo.bar:1234"]
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metrics",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metrics",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "foo",
@@ -1185,10 +1154,9 @@ scrape_configs:
       job: yyy
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://pp:80/metrics?a=c&a=xy",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://pp:80/metrics?a=c&a=xy",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"foo":      "bar",
 				"instance": "pp:80",
@@ -1252,10 +1220,9 @@ scrape_configs:
         replacement: true
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://127.0.0.1:9116/snmp?module=if_mib&target=192.168.1.2",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://127.0.0.1:9116/snmp?module=if_mib&target=192.168.1.2",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "192.168.1.2",
 				"job":      "snmp",
@@ -1282,10 +1249,9 @@ scrape_configs:
     target_label: __metrics_path__
 `, []*ScrapeWork{
 		{
-			ScrapeURL:       "http://foo.bar:1234/metricspath",
-			ScrapeInterval:  defaultScrapeInterval,
-			ScrapeTimeout:   defaultScrapeTimeout,
-			HonorTimestamps: true,
+			ScrapeURL:      "http://foo.bar:1234/metricspath",
+			ScrapeInterval: defaultScrapeInterval,
+			ScrapeTimeout:  defaultScrapeTimeout,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
 				"job":      "path wo slash",
@@ -1313,7 +1279,6 @@ scrape_configs:
 			ScrapeTimeout:       time.Hour * 24,
 			ScrapeAlignInterval: time.Hour * 24,
 			ScrapeOffset:        time.Hour * 24 * 2,
-			HonorTimestamps:     true,
 			NoStaleMarkers:      true,
 			Labels: promutils.NewLabelsFromMap(map[string]string{
 				"instance": "foo.bar:1234",
@@ -1353,16 +1318,14 @@ func TestScrapeConfigClone(t *testing.T) {
 
 	f(&ScrapeConfig{})
 
-	bFalse := false
 	var ie promrelabel.IfExpression
 	if err := ie.Parse(`{foo=~"bar",baz!="z"}`); err != nil {
 		t.Fatalf("unexpected error: %s", err)
 	}
 	f(&ScrapeConfig{
-		JobName:         "foo",
-		ScrapeInterval:  promutils.NewDuration(time.Second * 47),
-		HonorLabels:     true,
-		HonorTimestamps: &bFalse,
+		JobName:        "foo",
+		ScrapeInterval: promutils.NewDuration(time.Second * 47),
+		HonorLabels:    true,
 		Params: map[string][]string{
 			"foo": {"bar", "baz"},
 		},

lib/promscrape/discovery/azure/api.go

@@ -199,12 +199,17 @@ func getRefreshTokenFunc(sdc *SDConfig, ac, proxyAC *promauth.Config, env *cloud
 		q := endpointURL.Query()
 
 		msiSecret := os.Getenv("MSI_SECRET")
+		identityHeader := os.Getenv("IDENTITY_HEADER")
 		clientIDParam := "client_id"
 		apiVersion := "2018-02-01"
 		if msiSecret != "" {
 			clientIDParam = "clientid"
 			apiVersion = "2017-09-01"
 		}
+		if identityHeader != "" {
+			clientIDParam = "client_id"
+			apiVersion = "2019-08-01"
+		}
 		q.Set("api-version", apiVersion)
 		q.Set(clientIDParam, sdc.ClientID)
 		q.Set("resource", env.ResourceManagerEndpoint)
@@ -214,6 +219,9 @@ func getRefreshTokenFunc(sdc *SDConfig, ac, proxyAC *promauth.Config, env *cloud
 		modifyRequest = func(request *http.Request) {
 			if msiSecret != "" {
 				request.Header.Set("secret", msiSecret)
+				if identityHeader != "" {
+					request.Header.Set("X-IDENTITY-HEADER", msiSecret)
+				}
 			} else {
 				request.Header.Set("Metadata", "true")
 			}
@@ -235,15 +243,38 @@ func getRefreshTokenFunc(sdc *SDConfig, ac, proxyAC *promauth.Config, env *cloud
 		if err := json.Unmarshal(data, &tr); err != nil {
 			return "", 0, fmt.Errorf("cannot parse token auth response %q: %w", data, err)
 		}
-		expiresInSeconds, err := strconv.ParseInt(tr.ExpiresIn, 10, 64)
+
+		expiresInSeconds, err := parseTokenExpiry(tr)
 		if err != nil {
-			return "", 0, fmt.Errorf("cannot parse expiresIn param in token auth %q: %w", tr.ExpiresIn, err)
+			return "", 0, err
 		}
 		return tr.AccessToken, time.Second * time.Duration(expiresInSeconds), nil
 	}
 	return refreshToken, nil
 }
 
+// parseTokenExpiry returns token expiry in seconds
+func parseTokenExpiry(tr tokenResponse) (int64, error) {
+	var expiresInSeconds int64
+	var err error
+
+	if tr.ExpiresIn == "" {
+		var expiresOnSeconds int64
+		expiresOnSeconds, err = strconv.ParseInt(tr.ExpiresOn, 10, 64)
+		if err != nil {
+			return 0, fmt.Errorf("cannot parse expiresOn=%q in auth token response: %w", tr.ExpiresOn, err)
+		}
+		expiresInSeconds = expiresOnSeconds - time.Now().Unix()
+	} else {
+		expiresInSeconds, err = strconv.ParseInt(tr.ExpiresIn, 10, 64)
+		if err != nil {
+			return 0, fmt.Errorf("cannot parse expiresIn=%q auth token response: %w", tr.ExpiresIn, err)
+		}
+	}
+
+	return expiresInSeconds, nil
+}
+
 // mustGetAuthToken returns auth token
 // in case of error, logs error and return empty token
 func (ac *apiConfig) mustGetAuthToken() string {
@@ -270,4 +301,5 @@ func (ac *apiConfig) mustGetAuthToken() string {
 type tokenResponse struct {
 	AccessToken string `json:"access_token"`
 	ExpiresIn   string `json:"expires_in"`
+	ExpiresOn   string `json:"expires_on"`
 }

lib/promscrape/discovery/azure/azure.go

@@ -58,7 +58,11 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.c.Stop()
+	}
 }
 
 func appendMachineLabels(vms []virtualMachine, port int, sdc *SDConfig) []*promutils.Labels {

lib/promscrape/discovery/azure/machine_test.go

@@ -70,6 +70,7 @@ func TestGetVirtualMachinesSuccess(t *testing.T) {
 			if err != nil {
 				t.Fatalf("unexpected error at client create: %s", err)
 			}
+			defer c.Stop()
 			ac := &apiConfig{
 				c:              c,
 				subscriptionID: "some-id",

lib/promscrape/discovery/consul/api.go

@@ -90,6 +90,7 @@ func newAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
 	}
 	dc, err := getDatacenter(client, sdc.Datacenter)
 	if err != nil {
+		client.Stop()
 		return nil, fmt.Errorf("cannot obtain consul datacenter: %w", err)
 	}
 

lib/promscrape/discovery/digitalocean/digitalocean.go

@@ -155,5 +155,9 @@ func addDropletLabels(droplets []droplet, defaultPort int) []*promutils.Labels {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.client.Stop()
+	}
 }

lib/promscrape/discovery/docker/docker.go

@@ -47,5 +47,9 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.client.Stop()
+	}
 }

lib/promscrape/discovery/dockerswarm/dockerswarm.go

@@ -56,5 +56,9 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.client.Stop()
+	}
 }

lib/promscrape/discovery/eureka/eureka.go

@@ -101,7 +101,11 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.client.Stop()
+	}
 }
 
 func addInstanceLabels(apps *applications) []*promutils.Labels {

lib/promscrape/discovery/gce/api.go

@@ -42,6 +42,7 @@ func newAPIConfig(sdc *SDConfig) (*apiConfig, error) {
 	if len(project) == 0 {
 		proj, err := getCurrentProject()
 		if err != nil {
+			client.CloseIdleConnections()
 			return nil, fmt.Errorf("cannot determine the current project; make sure `vmagent` runs inside GCE; error: %w", err)
 		}
 		project = proj
@@ -52,6 +53,7 @@ func newAPIConfig(sdc *SDConfig) (*apiConfig, error) {
 		// Autodetect the current zone.
 		zone, err := getCurrentZone()
 		if err != nil {
+			client.CloseIdleConnections()
 			return nil, fmt.Errorf("cannot determine the current zone; make sure `vmagent` runs inside GCE; error: %w", err)
 		}
 		zones = append(zones, zone)
@@ -62,6 +64,7 @@ func newAPIConfig(sdc *SDConfig) (*apiConfig, error) {
 		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3202
 		zs, err := getZonesForProject(client, project)
 		if err != nil {
+			client.CloseIdleConnections()
 			return nil, fmt.Errorf("cannot obtain zones for project %q: %w", project, err)
 		}
 		zones = zs

lib/promscrape/discovery/gce/gce.go

@@ -73,5 +73,9 @@ func (sdc *SDConfig) GetLabels(baseDir string) ([]*promutils.Labels, error) {
 
 // MustStop stops further usage for sdc.
 func (sdc *SDConfig) MustStop() {
-	configMap.Delete(sdc)
+	v := configMap.Delete(sdc)
+	if v != nil {
+		cfg := v.(*apiConfig)
+		cfg.client.CloseIdleConnections()
+	}
 }