Merge remote-tracking branch 'prometheus/main' into arve/wlog-histograms

.github/workflows/ci.yml

@@ -161,21 +161,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
       - name: Install Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          cache: false
           go-version: 1.22.x
       - name: Install snmp_exporter/generator dependencies
         run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
         if: github.repository == 'prometheus/snmp_exporter'
       - name: Lint
-        uses: golangci/golangci-lint-action@3cfe3a4abbb849e10058ce4af15d205b6da42804 # v4.0.0
+        uses: golangci/golangci-lint-action@a4f60bb28d35aeee14e6880718e0c85ff1882e64 # v6.0.1
         with:
           args: --verbose
           # Make sure to sync this with Makefile.common and scripts/golangci-lint.yml.
-          version: v1.56.2
+          version: v1.59.0
   fuzzing:
     uses: ./.github/workflows/fuzzing.yml
     if: github.event_name == 'pull_request'

.golangci.yml

@@ -47,7 +47,7 @@ issues:
       source: "^// ==="
     - linters:
         - perfsprint
-      text: "fmt.Sprintf can be replaced with string addition"
+      text: "fmt.Sprintf can be replaced with string concatenation"
 linters-settings:
   depguard:
     rules:

Makefile.common

@@ -61,7 +61,7 @@ PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_
 SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v1.56.2
+GOLANGCI_LINT_VERSION ?= v1.59.0
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64/arm64.
 # windows isn't included here because of the path separator being different.
 ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))

cmd/prometheus/main.go

@@ -42,6 +42,7 @@ import (
 	"github.com/mwitkow/go-conntrack"
 	"github.com/oklog/run"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
 	versioncollector "github.com/prometheus/client_golang/prometheus/collectors/version"
 	"github.com/prometheus/common/model"
 	"github.com/prometheus/common/promlog"
@@ -252,6 +253,18 @@ func main() {
 		newFlagRetentionDuration model.Duration
 	)
 
+	// Unregister the default GoCollector, and reregister with our defaults.
+	if prometheus.Unregister(collectors.NewGoCollector()) {
+		prometheus.MustRegister(
+			collectors.NewGoCollector(
+				collectors.WithGoCollectorRuntimeMetrics(
+					collectors.MetricsGC,
+					collectors.MetricsScheduler,
+				),
+			),
+		)
+	}
+
 	cfg := flagConfig{
 		notifier: notifier.Options{
 			Registerer: prometheus.DefaultRegisterer,

cmd/prometheus/query_log_test.go

@@ -296,7 +296,7 @@ func (p *queryLogTest) run(t *testing.T) {
 	if p.exactQueryCount() {
 		require.Equal(t, 1, qc)
 	} else {
-		require.Greater(t, qc, 0, "no queries logged")
+		require.Positive(t, qc, "no queries logged")
 	}
 	p.validateLastQuery(t, ql)
 
@@ -366,7 +366,7 @@ func (p *queryLogTest) run(t *testing.T) {
 	if p.exactQueryCount() {
 		require.Equal(t, 1, qc)
 	} else {
-		require.Greater(t, qc, 0, "no queries logged")
+		require.Positive(t, qc, "no queries logged")
 	}
 }
 

docs/configuration/configuration.md

@@ -1349,7 +1349,7 @@ interface.
 The following meta labels are available on targets during [relabeling](#relabel_config):
 
 * `__meta_openstack_address_pool`: the pool of the private IP.
-* `__meta_openstack_instance_flavor`: the flavor of the OpenStack instance.
+* `__meta_openstack_instance_flavor`: the flavor ID of the OpenStack instance.
 * `__meta_openstack_instance_id`: the OpenStack instance ID.
 * `__meta_openstack_instance_image`: the ID of the image the OpenStack instance is using.
 * `__meta_openstack_instance_name`: the OpenStack instance name.
@@ -1357,7 +1357,7 @@ The following meta labels are available on targets during [relabeling](#relabel_
 * `__meta_openstack_private_ip`: the private IP of the OpenStack instance.
 * `__meta_openstack_project_id`: the project (tenant) owning this instance.
 * `__meta_openstack_public_ip`: the public IP of the OpenStack instance.
-* `__meta_openstack_tag_<tagkey>`: each tag value of the instance.
+* `__meta_openstack_tag_<key>`: each metadata item of the instance, with any unsupported characters converted to an underscore.
 * `__meta_openstack_user_id`: the user account owning the tenant.
 
 See below for the configuration options for OpenStack discovery:

promql/engine_test.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"sort"
 	"strconv"
+	"sync"
 	"testing"
 	"time"
 
@@ -58,7 +59,9 @@ func TestQueryConcurrency(t *testing.T) {
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 	queryTracker := promql.NewActiveQueryTracker(dir, maxConcurrency, nil)
-	t.Cleanup(queryTracker.Close)
+	t.Cleanup(func() {
+		require.NoError(t, queryTracker.Close())
+	})
 
 	opts := promql.EngineOpts{
 		Logger:             nil,
@@ -90,9 +93,14 @@ func TestQueryConcurrency(t *testing.T) {
 		return nil
 	}
 
+	var wg sync.WaitGroup
 	for i := 0; i < maxConcurrency; i++ {
 		q := engine.NewTestQuery(f)
-		go q.Exec(ctx)
+		wg.Add(1)
+		go func() {
+			q.Exec(ctx)
+			wg.Done()
+		}()
 		select {
 		case <-processing:
 			// Expected.
@@ -102,7 +110,11 @@ func TestQueryConcurrency(t *testing.T) {
 	}
 
 	q := engine.NewTestQuery(f)
-	go q.Exec(ctx)
+	wg.Add(1)
+	go func() {
+		q.Exec(ctx)
+		wg.Done()
+	}()
 
 	select {
 	case <-processing:
@@ -125,6 +137,8 @@ func TestQueryConcurrency(t *testing.T) {
 	for i := 0; i < maxConcurrency; i++ {
 		block <- struct{}{}
 	}
+
+	wg.Wait()
 }
 
 // contextDone returns an error if the context was canceled or timed out.

promql/query_logger.go

@@ -16,6 +16,8 @@ package promql
 import (
 	"context"
 	"encoding/json"
+	"errors"
+	"fmt"
 	"io"
 	"os"
 	"path/filepath"
@@ -36,6 +38,8 @@ type ActiveQueryTracker struct {
 	maxConcurrent int
 }
 
+var _ io.Closer = &ActiveQueryTracker{}
+
 type Entry struct {
 	Query     string `json:"query"`
 	Timestamp int64  `json:"timestamp_sec"`
@@ -83,6 +87,23 @@ func logUnfinishedQueries(filename string, filesize int, logger log.Logger) {
 	}
 }
 
+type mmapedFile struct {
+	f io.Closer
+	m mmap.MMap
+}
+
+func (f *mmapedFile) Close() error {
+	err := f.m.Unmap()
+	if err != nil {
+		err = fmt.Errorf("mmapedFile: unmapping: %w", err)
+	}
+	if fErr := f.f.Close(); fErr != nil {
+		return errors.Join(fmt.Errorf("close mmapedFile.f: %w", fErr), err)
+	}
+
+	return err
+}
+
 func getMMapedFile(filename string, filesize int, logger log.Logger) ([]byte, io.Closer, error) {
 	file, err := os.OpenFile(filename, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0o666)
 	if err != nil {
@@ -108,7 +129,7 @@ func getMMapedFile(filename string, filesize int, logger log.Logger) ([]byte, io
 		return nil, nil, err
 	}
 
-	return fileAsBytes, file, err
+	return fileAsBytes, &mmapedFile{f: file, m: fileAsBytes}, err
 }
 
 func NewActiveQueryTracker(localStoragePath string, maxConcurrent int, logger log.Logger) *ActiveQueryTracker {
@@ -204,9 +225,13 @@ func (tracker ActiveQueryTracker) Insert(ctx context.Context, query string) (int
 	}
 }
 
-func (tracker *ActiveQueryTracker) Close() {
+// Close closes tracker.
+func (tracker *ActiveQueryTracker) Close() error {
 	if tracker == nil || tracker.closer == nil {
-		return
+		return nil
 	}
-	tracker.closer.Close()
+	if err := tracker.closer.Close(); err != nil {
+		return fmt.Errorf("close ActiveQueryTracker.closer: %w", err)
+	}
+	return nil
 }

promql/query_logger_test.go

@@ -16,6 +16,7 @@ package promql
 import (
 	"context"
 	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/grafana/regexp"
@@ -104,26 +105,26 @@ func TestIndexReuse(t *testing.T) {
 }
 
 func TestMMapFile(t *testing.T) {
-	file, err := os.CreateTemp("", "mmapedFile")
+	dir := t.TempDir()
+	fpath := filepath.Join(dir, "mmapedFile")
+	const data = "ab"
+
+	fileAsBytes, closer, err := getMMapedFile(fpath, 2, nil)
 	require.NoError(t, err)
+	copy(fileAsBytes, data)
+	require.NoError(t, closer.Close())
 
-	filename := file.Name()
+	f, err := os.Open(fpath)
-	defer os.Remove(filename)
-
-	fileAsBytes, _, err := getMMapedFile(filename, 2, nil)
-
-	require.NoError(t, err)
-	copy(fileAsBytes, "ab")
-
-	f, err := os.Open(filename)
 	require.NoError(t, err)
+	t.Cleanup(func() {
+		_ = f.Close()
+	})
 
 	bytes := make([]byte, 4)
 	n, err := f.Read(bytes)
-	require.Equal(t, 2, n)
 	require.NoError(t, err, "Unexpected error while reading file.")
-
+	require.Equal(t, 2, n)
-	require.Equal(t, fileAsBytes, bytes[:2], "Mmap failed")
+	require.Equal(t, []byte(data), bytes[:2], "Mmap failed")
 }
 
 func TestParseBrokenJSON(t *testing.T) {

scripts/golangci-lint.yml

@@ -24,8 +24,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
-      - name: install Go
+      - name: Install Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
           go-version: 1.22.x
@@ -33,6 +33,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
         if: github.repository == 'prometheus/snmp_exporter'
       - name: Lint
-        uses: golangci/golangci-lint-action@9d1e0624a798bb64f6c3cea93db47765312263dc # v5.1.0
+        uses: golangci/golangci-lint-action@a4f60bb28d35aeee14e6880718e0c85ff1882e64 # v6.0.1
         with:
-          version: v1.56.2
+          args: --verbose
+          version: v1.59.0

tsdb/chunks/queue_test.go

@@ -55,7 +55,7 @@ func (q *writeJobQueue) assertInvariants(t *testing.T) {
 			require.Len(t, s.segment, s.nextWrite)
 		}
 		// Last segment must have at least one element, or we wouldn't have created it.
-		require.Greater(t, s.nextWrite, 0)
+		require.Positive(t, s.nextWrite)
 	}
 
 	require.Equal(t, q.size, totalSize)

tsdb/db_test.go

@@ -4574,7 +4574,7 @@ func TestOOOCompaction(t *testing.T) {
 		ms, created, err := db.head.getOrCreate(lbls.Hash(), lbls)
 		require.NoError(t, err)
 		require.False(t, created)
-		require.Greater(t, ms.ooo.oooHeadChunk.chunk.NumSamples(), 0)
+		require.Positive(t, ms.ooo.oooHeadChunk.chunk.NumSamples())
 		require.Len(t, ms.ooo.oooMmappedChunks, 14) // 7 original, 7 duplicate.
 	}
 	checkNonEmptyOOOChunk(series1)
@@ -4715,7 +4715,7 @@ func TestOOOCompactionWithNormalCompaction(t *testing.T) {
 		ms, created, err := db.head.getOrCreate(lbls.Hash(), lbls)
 		require.NoError(t, err)
 		require.False(t, created)
-		require.Greater(t, ms.ooo.oooHeadChunk.chunk.NumSamples(), 0)
+		require.Positive(t, ms.ooo.oooHeadChunk.chunk.NumSamples())
 	}
 
 	// If the normal Head is not compacted, the OOO head compaction does not take place.
@@ -4816,7 +4816,7 @@ func TestOOOCompactionWithDisabledWriteLog(t *testing.T) {
 		ms, created, err := db.head.getOrCreate(lbls.Hash(), lbls)
 		require.NoError(t, err)
 		require.False(t, created)
-		require.Greater(t, ms.ooo.oooHeadChunk.chunk.NumSamples(), 0)
+		require.Positive(t, ms.ooo.oooHeadChunk.chunk.NumSamples())
 	}
 
 	// If the normal Head is not compacted, the OOO head compaction does not take place.
@@ -5517,8 +5517,8 @@ func TestWBLAndMmapReplay(t *testing.T) {
 			addedRecs++
 			require.NoError(t, newWbl.Log(rec))
 		}
-		require.Greater(t, markers, 0)
+		require.Positive(t, markers)
-		require.Greater(t, addedRecs, 0)
+		require.Positive(t, addedRecs)
 		require.NoError(t, newWbl.Close())
 		require.NoError(t, sr.Close())
 		require.NoError(t, os.RemoveAll(wblDir))

tsdb/head_test.go

@@ -3557,7 +3557,7 @@ func TestHistogramInWALAndMmapChunk(t *testing.T) {
 		expMmapChunks = append(expMmapChunks, &cpy)
 	}
 	expHeadChunkSamples := ms.headChunks.chunk.NumSamples()
-	require.Greater(t, expHeadChunkSamples, 0)
+	require.Positive(t, expHeadChunkSamples)
 
 	// Series with mix of histograms and float.
 	s2 := labels.FromStrings("a", "b2")
@@ -4638,7 +4638,7 @@ func TestChunkSnapshotTakenAfterIncompleteSnapshot(t *testing.T) {
 	require.NoError(t, err)
 	require.NotEqual(t, "", name)
 	require.Equal(t, 0, idx)
-	require.Greater(t, offset, 0)
+	require.Positive(t, offset)
 }
 
 // TestWBLReplay checks the replay at a low level.

tsdb/wlog/checkpoint_test.go

@@ -251,7 +251,7 @@ func TestCheckpoint(t *testing.T) {
 			require.NoError(t, w.Truncate(107))
 			require.NoError(t, DeleteCheckpoints(w.Dir(), 106))
 			require.Equal(t, histogramsInWAL+floatHistogramsInWAL+samplesInWAL, stats.TotalSamples)
-			require.Greater(t, stats.DroppedSamples, 0)
+			require.Positive(t, stats.DroppedSamples)
 
 			// Only the new checkpoint should be left.
 			files, err := os.ReadDir(dir)

web/api/v1/api_test.go

@@ -2973,8 +2973,10 @@ func assertAPIError(t *testing.T, got *apiError, exp errorType) {
 	t.Helper()
 
 	if exp == errorNone {
+		//nolint:testifylint
 		require.Nil(t, got)
 	} else {
+		//nolint:testifylint
 		require.NotNil(t, got)
 		require.Equal(t, exp, got.typ, "(%q)", got)
 	}