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prw2: Split PRW2.0 from metadata-wal-records feature (#16030)

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Rationales:

* metadata-wal-records might be deprecated and replaced going forward: https://github.com/prometheus/prometheus/issues/15911
* PRW 2.0 works without metadata just fine (although it sends untyped metrics as expected).

Signed-off-by: bwplotka <bwplotka@gmail.com>
This commit is contained in:
Bartlomiej Plotka 2025-02-13 13:16:33 +01:00 committed by GitHub
parent 733a5e9eb4
commit de23a9667c
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
10 changed files with 26 additions and 33 deletions
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4
cmd/prometheus/main.go
View file

@ -231,7 +231,7 @@ func (c *flagConfig) setFeatureListOptions(logger *slog.Logger) error {
logger.Info("Experimental additional scrape metrics enabled")
case "metadata-wal-records":
c.scrape.AppendMetadata = true
logger.Info("Experimental metadata records in WAL enabled, required for remote write 2.0")
logger.Info("Experimental metadata records in WAL enabled")
case "promql-per-step-stats":
c.enablePerStepStats = true
logger.Info("Experimental per-step statistics reporting")
@ -699,7 +699,7 @@ func main() {
var (
localStorage = &readyStorage{stats: tsdb.NewDBStats()}
scraper = &readyScrapeManager{}
remoteStorage = remote.NewStorage(logger.With("component", "remote"), prometheus.DefaultRegisterer, localStorage.StartTime, localStoragePath, time.Duration(cfg.RemoteFlushDeadline), scraper, cfg.scrape.AppendMetadata)
remoteStorage = remote.NewStorage(logger.With("component", "remote"), prometheus.DefaultRegisterer, localStorage.StartTime, localStoragePath, time.Duration(cfg.RemoteFlushDeadline), scraper)
fanoutStorage = storage.NewFanout(logger, localStorage, remoteStorage)
)

3
docs/feature_flags.md
View file

@ -114,8 +114,7 @@ Fall back to serving the old (Prometheus 2.x) web UI instead of the new UI. The
When enabled, Prometheus will store metadata in-memory and keep track of
metadata changes as WAL records on a per-series basis.
This must be used if
you are also using remote write 2.0 as it will only gather metadata from the WAL.
This must be used if you would like to send metadata using the new remote write 2.0.
## Delay compaction start time

6
storage/remote/queue_manager_test.go
View file

@ -135,7 +135,7 @@ func TestBasicContentNegotiation(t *testing.T) {
} {
t.Run(tc.name, func(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, true)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
defer s.Close()
var (
@ -243,7 +243,7 @@ func TestSampleDelivery(t *testing.T) {
} {
t.Run(fmt.Sprintf("%s-%s", tc.protoMsg, tc.name), func(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, true)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
defer s.Close()
var (
@ -362,7 +362,7 @@ func TestMetadataDelivery(t *testing.T) {
func TestWALMetadataDelivery(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, true)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
defer s.Close()
cfg := config.DefaultQueueConfig

2
storage/remote/read_test.go
View file

@ -93,7 +93,7 @@ func TestNoDuplicateReadConfigs(t *testing.T) {
for _, tc := range cases {
t.Run("", func(t *testing.T) {
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.DefaultGlobalConfig,
RemoteReadConfigs: tc.cfgs,

4
storage/remote/storage.go
View file

@ -64,7 +64,7 @@ type Storage struct {
}
// NewStorage returns a remote.Storage.
func NewStorage(l *slog.Logger, reg prometheus.Registerer, stCallback startTimeCallback, walDir string, flushDeadline time.Duration, sm ReadyScrapeManager, metadataInWAL bool) *Storage {
func NewStorage(l *slog.Logger, reg prometheus.Registerer, stCallback startTimeCallback, walDir string, flushDeadline time.Duration, sm ReadyScrapeManager) *Storage {
if l == nil {
l = promslog.NewNopLogger()
}
@ -76,7 +76,7 @@ func NewStorage(l *slog.Logger, reg prometheus.Registerer, stCallback startTimeC
deduper: deduper,
localStartTimeCallback: stCallback,
}
s.rws = NewWriteStorage(s.logger, reg, walDir, flushDeadline, sm, metadataInWAL)
s.rws = NewWriteStorage(s.logger, reg, walDir, flushDeadline, sm)
return s
}

10
storage/remote/storage_test.go
View file

@ -29,7 +29,7 @@ import (
func TestStorageLifecycle(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.DefaultGlobalConfig,
RemoteWriteConfigs: []*config.RemoteWriteConfig{
@ -56,7 +56,7 @@ func TestStorageLifecycle(t *testing.T) {
func TestUpdateRemoteReadConfigs(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.GlobalConfig{},
@ -77,7 +77,7 @@ func TestUpdateRemoteReadConfigs(t *testing.T) {
func TestFilterExternalLabels(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.GlobalConfig{
@ -102,7 +102,7 @@ func TestFilterExternalLabels(t *testing.T) {
func TestIgnoreExternalLabels(t *testing.T) {
dir := t.TempDir()
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.GlobalConfig{
@ -154,7 +154,7 @@ func baseRemoteReadConfig(host string) *config.RemoteReadConfig {
// ApplyConfig runs concurrently with Notify
// See https://github.com/prometheus/prometheus/issues/12747
func TestWriteStorageApplyConfigsDuringCommit(t *testing.T) {
s := NewStorage(nil, nil, nil, t.TempDir(), defaultFlushDeadline, nil, false)
s := NewStorage(nil, nil, nil, t.TempDir(), defaultFlushDeadline, nil)
var wg sync.WaitGroup
wg.Add(2000)

8
storage/remote/write.go
View file

@ -15,7 +15,6 @@ package remote
import (
"context"
"errors"
"fmt"
"log/slog"
"math"
@ -67,7 +66,6 @@ type WriteStorage struct {
externalLabels labels.Labels
dir string
queues map[string]*QueueManager
metadataInWAL bool
samplesIn *ewmaRate
flushDeadline time.Duration
interner *pool
@ -79,7 +77,7 @@ type WriteStorage struct {
}
// NewWriteStorage creates and runs a WriteStorage.
func NewWriteStorage(logger *slog.Logger, reg prometheus.Registerer, dir string, flushDeadline time.Duration, sm ReadyScrapeManager, metadataInWal bool) *WriteStorage {
func NewWriteStorage(logger *slog.Logger, reg prometheus.Registerer, dir string, flushDeadline time.Duration, sm ReadyScrapeManager) *WriteStorage {
if logger == nil {
logger = promslog.NewNopLogger()
}
@ -95,7 +93,6 @@ func NewWriteStorage(logger *slog.Logger, reg prometheus.Registerer, dir string,
interner: newPool(),
scraper: sm,
quit: make(chan struct{}),
metadataInWAL: metadataInWal,
highestTimestamp: &maxTimestamp{
Gauge: prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: namespace,
@ -149,9 +146,6 @@ func (rws *WriteStorage) ApplyConfig(conf *config.Config) error {
newQueues := make(map[string]*QueueManager)
newHashes := []string{}
for _, rwConf := range conf.RemoteWriteConfigs {
if rwConf.ProtobufMessage == config.RemoteWriteProtoMsgV2 && !rws.metadataInWAL {
return errors.New("invalid remote write configuration, if you are using remote write version 2.0 the `--enable-feature=metadata-wal-records` feature flag must be enabled")
}
hash, err := toHash(rwConf)
if err != nil {
return err

14
storage/remote/write_test.go
View file

@ -117,7 +117,7 @@ func TestWriteStorageApplyConfig_NoDuplicateWriteConfigs(t *testing.T) {
},
} {
t.Run("", func(t *testing.T) {
s := NewWriteStorage(nil, nil, dir, time.Millisecond, nil, false)
s := NewWriteStorage(nil, nil, dir, time.Millisecond, nil)
conf := &config.Config{
GlobalConfig: config.DefaultGlobalConfig,
RemoteWriteConfigs: tc.cfgs,
@ -143,7 +143,7 @@ func TestWriteStorageApplyConfig_RestartOnNameChange(t *testing.T) {
hash, err := toHash(cfg)
require.NoError(t, err)
s := NewWriteStorage(nil, nil, dir, time.Millisecond, nil, false)
s := NewWriteStorage(nil, nil, dir, time.Millisecond, nil)
conf := &config.Config{
GlobalConfig: config.DefaultGlobalConfig,
@ -165,7 +165,7 @@ func TestWriteStorageApplyConfig_RestartOnNameChange(t *testing.T) {
func TestWriteStorageApplyConfig_UpdateWithRegisterer(t *testing.T) {
dir := t.TempDir()
s := NewWriteStorage(nil, prometheus.NewRegistry(), dir, time.Millisecond, nil, false)
s := NewWriteStorage(nil, prometheus.NewRegistry(), dir, time.Millisecond, nil)
c1 := &config.RemoteWriteConfig{
Name: "named",
URL: &common_config.URL{
@ -206,7 +206,7 @@ func TestWriteStorageApplyConfig_UpdateWithRegisterer(t *testing.T) {
func TestWriteStorageApplyConfig_Lifecycle(t *testing.T) {
dir := t.TempDir()
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.DefaultGlobalConfig,
RemoteWriteConfigs: []*config.RemoteWriteConfig{
@ -222,7 +222,7 @@ func TestWriteStorageApplyConfig_Lifecycle(t *testing.T) {
func TestWriteStorageApplyConfig_UpdateExternalLabels(t *testing.T) {
dir := t.TempDir()
s := NewWriteStorage(nil, prometheus.NewRegistry(), dir, time.Second, nil, false)
s := NewWriteStorage(nil, prometheus.NewRegistry(), dir, time.Second, nil)
externalLabels := labels.FromStrings("external", "true")
conf := &config.Config{
@ -250,7 +250,7 @@ func TestWriteStorageApplyConfig_UpdateExternalLabels(t *testing.T) {
func TestWriteStorageApplyConfig_Idempotent(t *testing.T) {
dir := t.TempDir()
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil)
conf := &config.Config{
GlobalConfig: config.GlobalConfig{},
RemoteWriteConfigs: []*config.RemoteWriteConfig{
@ -274,7 +274,7 @@ func TestWriteStorageApplyConfig_Idempotent(t *testing.T) {
func TestWriteStorageApplyConfig_PartialUpdate(t *testing.T) {
dir := t.TempDir()
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil, false)
s := NewWriteStorage(nil, nil, dir, defaultFlushDeadline, nil)
c0 := &config.RemoteWriteConfig{
RemoteTimeout: model.Duration(10 * time.Second),

6
tsdb/agent/db_test.go
View file

@ -91,7 +91,7 @@ func createTestAgentDB(t testing.TB, reg prometheus.Registerer, opts *Options) *
t.Helper()
dbDir := t.TempDir()
rs := remote.NewStorage(promslog.NewNopLogger(), reg, startTime, dbDir, time.Second*30, nil, false)
rs := remote.NewStorage(promslog.NewNopLogger(), reg, startTime, dbDir, time.Second*30, nil)
t.Cleanup(func() {
require.NoError(t, rs.Close())
})
@ -737,7 +737,7 @@ func TestLockfile(t *testing.T) {
tsdbutil.TestDirLockerUsage(t, func(t *testing.T, data string, createLock bool) (*tsdbutil.DirLocker, testutil.Closer) {
logger := promslog.NewNopLogger()
reg := prometheus.NewRegistry()
rs := remote.NewStorage(logger, reg, startTime, data, time.Second*30, nil, false)
rs := remote.NewStorage(logger, reg, startTime, data, time.Second*30, nil)
t.Cleanup(func() {
require.NoError(t, rs.Close())
})
@ -757,7 +757,7 @@ func TestLockfile(t *testing.T) {
func Test_ExistingWAL_NextRef(t *testing.T) {
dbDir := t.TempDir()
rs := remote.NewStorage(promslog.NewNopLogger(), nil, startTime, dbDir, time.Second*30, nil, false)
rs := remote.NewStorage(promslog.NewNopLogger(), nil, startTime, dbDir, time.Second*30, nil)
defer func() {
require.NoError(t, rs.Close())
}()

2
web/api/v1/api_test.go
View file

@ -495,7 +495,7 @@ func TestEndpoints(t *testing.T) {
remote := remote.NewStorage(promslog.New(&promslogConfig), prometheus.DefaultRegisterer, func() (int64, error) {
return 0, nil
}, dbDir, 1*time.Second, nil, false)
}, dbDir, 1*time.Second, nil)
err = remote.ApplyConfig(&config.Config{
RemoteReadConfigs: []*config.RemoteReadConfig{