compact: hook nodownsamplemarkfilter into filters chain (thanos-io#6893)

We have a NoDownsampleMarkFilter that we were not using before in the
compactor for some reason. Hook it into the filters chain if
downsampling is enabled and then trim matching ULIDs from the
downsampling process. Add a test to cover this scenario.

Fixes thanos-io#6179.

Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>

cmd/thanos/compact.go

@@ -234,6 +234,7 @@ func runCompact(
 	ignoreDeletionMarkFilter := block.NewIgnoreDeletionMarkFilter(logger, insBkt, deleteDelay/2, conf.blockMetaFetchConcurrency)
 	duplicateBlocksFilter := block.NewDeduplicateFilter(conf.blockMetaFetchConcurrency)
 	noCompactMarkerFilter := compact.NewGatherNoCompactionMarkFilter(logger, insBkt, conf.blockMetaFetchConcurrency)
+	noDownsampleMarkerFilter := downsample.NewGatherNoDownsampleMarkFilter(logger, insBkt, conf.blockMetaFetchConcurrency)
 	labelShardedMetaFilter := block.NewLabelShardedMetaFilter(relabelConfig)
 	consistencyDelayMetaFilter := block.NewConsistencyDelayMetaFilter(logger, conf.consistencyDelay, extprom.WrapRegistererWithPrefix("thanos_", reg))
 	timePartitionMetaFilter := block.NewTimePartitionMetaFilter(conf.filterConf.MinTime, conf.filterConf.MaxTime)
@@ -260,18 +261,21 @@ func runCompact(
 		sy  *compact.Syncer
 	)
 	{
+		filters := []block.MetadataFilter{
+			timePartitionMetaFilter,
+			labelShardedMetaFilter,
+			consistencyDelayMetaFilter,
+			ignoreDeletionMarkFilter,
+			block.NewReplicaLabelRemover(logger, conf.dedupReplicaLabels),
+			duplicateBlocksFilter,
+			noCompactMarkerFilter,
+		}
+		if !conf.disableDownsampling {
+			filters = append(filters, noDownsampleMarkerFilter)
+		}
 		// Make sure all compactor meta syncs are done through Syncer.SyncMeta for readability.
 		cf := baseMetaFetcher.NewMetaFetcher(
-			extprom.WrapRegistererWithPrefix("thanos_", reg), []block.MetadataFilter{
-				timePartitionMetaFilter,
-				labelShardedMetaFilter,
-				consistencyDelayMetaFilter,
-				ignoreDeletionMarkFilter,
-				block.NewReplicaLabelRemover(logger, conf.dedupReplicaLabels),
-				duplicateBlocksFilter,
-				noCompactMarkerFilter,
-			},
-		)
+			extprom.WrapRegistererWithPrefix("thanos_", reg), filters)
 		cf.UpdateOnChange(func(blocks []metadata.Meta, err error) {
 			api.SetLoaded(blocks, err)
 		})
@@ -436,22 +440,53 @@ func runCompact(
 				return errors.Wrap(err, "sync before first pass of downsampling")
 			}
 
-			for _, meta := range sy.Metas() {
+			filteredMetas := sy.Metas()
+			noDownsampleBlocks := noDownsampleMarkerFilter.NoDownsampleMarkedBlocks()
+			for ul := range noDownsampleBlocks {
+				delete(filteredMetas, ul)
+			}
+
+			for _, meta := range filteredMetas {
 				groupKey := meta.Thanos.GroupKey()
 				downsampleMetrics.downsamples.WithLabelValues(groupKey)
 				downsampleMetrics.downsampleFailures.WithLabelValues(groupKey)
 			}
-			if err := downsampleBucket(ctx, logger, downsampleMetrics, insBkt, sy.Metas(), downsamplingDir, conf.downsampleConcurrency, conf.blockFilesConcurrency, metadata.HashFunc(conf.hashFunc), conf.acceptMalformedIndex); err != nil {
+
+			if err := downsampleBucket(
+				ctx,
+				logger,
+				downsampleMetrics,
+				insBkt,
+				filteredMetas,
+				downsamplingDir,
+				conf.downsampleConcurrency,
+				conf.blockFilesConcurrency,
+				metadata.HashFunc(conf.hashFunc),
+				conf.acceptMalformedIndex,
+			); err != nil {
 				return errors.Wrap(err, "first pass of downsampling failed")
 			}
 
 			level.Info(logger).Log("msg", "start second pass of downsampling")
 			if err := sy.SyncMetas(ctx); err != nil {
 				return errors.Wrap(err, "sync before second pass of downsampling")
 			}
-			if err := downsampleBucket(ctx, logger, downsampleMetrics, insBkt, sy.Metas(), downsamplingDir, conf.downsampleConcurrency, conf.blockFilesConcurrency, metadata.HashFunc(conf.hashFunc), conf.acceptMalformedIndex); err != nil {
+
+			if err := downsampleBucket(
+				ctx,
+				logger,
+				downsampleMetrics,
+				insBkt,
+				filteredMetas,
+				downsamplingDir,
+				conf.downsampleConcurrency,
+				conf.blockFilesConcurrency,
+				metadata.HashFunc(conf.hashFunc),
+				conf.acceptMalformedIndex,
+			); err != nil {
 				return errors.Wrap(err, "second pass of downsampling failed")
 			}
+
 			level.Info(logger).Log("msg", "downsampling iterations done")
 		} else {
 			level.Info(logger).Log("msg", "downsampling was explicitly disabled")

cmd/thanos/downsample.go

@@ -92,7 +92,7 @@ func RunDownsample(
 	// While fetching blocks, filter out blocks that were marked for no downsample.
 	metaFetcher, err := block.NewMetaFetcher(logger, block.FetcherConcurrency, insBkt, "", extprom.WrapRegistererWithPrefix("thanos_", reg), []block.MetadataFilter{
 		block.NewDeduplicateFilter(block.FetcherConcurrency),
-		downsample.NewGatherNoDownsampleMarkFilter(logger, insBkt),
+		downsample.NewGatherNoDownsampleMarkFilter(logger, insBkt, block.FetcherConcurrency),
 	})
 	if err != nil {
 		return errors.Wrap(err, "create meta fetcher")

pkg/compact/downsample/downsample.go

@@ -798,11 +798,11 @@ type GatherNoDownsampleMarkFilter struct {
 }
 
 // NewGatherNoDownsampleMarkFilter creates GatherNoDownsampleMarkFilter.
-func NewGatherNoDownsampleMarkFilter(logger log.Logger, bkt objstore.InstrumentedBucketReader) *GatherNoDownsampleMarkFilter {
+func NewGatherNoDownsampleMarkFilter(logger log.Logger, bkt objstore.InstrumentedBucketReader, concurrency int) *GatherNoDownsampleMarkFilter {
 	return &GatherNoDownsampleMarkFilter{
 		logger:      logger,
 		bkt:         bkt,
-		concurrency: 1,
+		concurrency: concurrency,
 	}
 }
 

test/e2e/compact_test.go

@@ -864,3 +864,49 @@ func ensureGETStatusCode(t testing.TB, code int, url string) {
 	testutil.Ok(t, err)
 	testutil.Equals(t, code, r.StatusCode)
 }
+
+func TestCompactorDownsampleIgnoresMarked(t *testing.T) {
+	now, err := time.Parse(time.RFC3339, "2020-03-24T08:00:00Z")
+	testutil.Ok(t, err)
+
+	logger := log.NewLogfmtLogger(os.Stderr)
+	e, err := e2e.NewDockerEnvironment("downsample-mrkd")
+	testutil.Ok(t, err)
+	t.Cleanup(e2ethanos.CleanScenario(t, e))
+
+	dir := filepath.Join(e.SharedDir(), "tmp")
+	testutil.Ok(t, os.MkdirAll(dir, os.ModePerm))
+
+	const bucket = "compact-test"
+	m := e2edb.NewMinio(e, "minio", bucket, e2edb.WithMinioTLS())
+	testutil.Ok(t, e2e.StartAndWaitReady(m))
+
+	bktCfg := e2ethanos.NewS3Config(bucket, m.Endpoint("http"), m.Dir())
+	bkt, err := s3.NewBucketWithConfig(logger, bktCfg, "test")
+	testutil.Ok(t, err)
+
+	downsampledBase := blockDesc{
+		series: []labels.Labels{
+			labels.FromStrings("z", "1", "b", "2"),
+			labels.FromStrings("z", "1", "b", "5"),
+		},
+		extLset: labels.FromStrings("case", "block-about-to-be-downsampled"),
+		mint:    timestamp.FromTime(now),
+		maxt:    timestamp.FromTime(now.Add(10 * 24 * time.Hour)),
+	}
+	// New block that will be downsampled.
+	justAfterConsistencyDelay := 30 * time.Minute
+
+	downsampledRawID, err := downsampledBase.Create(context.Background(), dir, justAfterConsistencyDelay, metadata.NoneFunc, 1200)
+	testutil.Ok(t, err)
+	testutil.Ok(t, objstore.UploadDir(context.Background(), logger, bkt, path.Join(dir, downsampledRawID.String()), downsampledRawID.String()))
+	testutil.Ok(t, block.MarkForNoDownsample(context.Background(), logger, bkt, downsampledRawID, metadata.ManualNoDownsampleReason, "why not", promauto.With(nil).NewCounter(prometheus.CounterOpts{})))
+
+	c := e2ethanos.NewCompactorBuilder(e, "working").Init(client.BucketConfig{
+		Type:   client.S3,
+		Config: e2ethanos.NewS3Config(bucket, m.InternalEndpoint("http"), m.Dir()),
+	}, nil)
+	testutil.Ok(t, e2e.StartAndWaitReady(c))
+	testutil.NotOk(t, c.WaitSumMetricsWithOptions(e2emon.Greater(0), []string{"thanos_compact_downsample_total"}, e2emon.WaitMissingMetrics()))
+
+}