store.go

// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.

package main

import (
	"context"
	"fmt"
	"strconv"
	"strings"
	"time"

	"github.com/alecthomas/units"
	extflag "github.com/efficientgo/tools/extkingpin"
	"github.com/go-kit/log"
	"github.com/go-kit/log/level"
	grpclogging "github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging"
	"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/tags"
	"github.com/oklog/run"
	"github.com/opentracing/opentracing-go"
	"github.com/pkg/errors"
	"github.com/prometheus/client_golang/prometheus"
	commonmodel "github.com/prometheus/common/model"
	"github.com/prometheus/common/route"

	"github.com/thanos-io/objstore"
	"github.com/thanos-io/objstore/client"
	objstoretracing "github.com/thanos-io/objstore/tracing/opentracing"

	blocksAPI "github.com/thanos-io/thanos/pkg/api/blocks"
	"github.com/thanos-io/thanos/pkg/block"
	"github.com/thanos-io/thanos/pkg/block/indexheader"
	"github.com/thanos-io/thanos/pkg/block/metadata"
	"github.com/thanos-io/thanos/pkg/component"
	hidden "github.com/thanos-io/thanos/pkg/extflag"
	"github.com/thanos-io/thanos/pkg/extkingpin"
	"github.com/thanos-io/thanos/pkg/extprom"
	extpromhttp "github.com/thanos-io/thanos/pkg/extprom/http"
	"github.com/thanos-io/thanos/pkg/gate"
	"github.com/thanos-io/thanos/pkg/info"
	"github.com/thanos-io/thanos/pkg/info/infopb"
	"github.com/thanos-io/thanos/pkg/logging"
	"github.com/thanos-io/thanos/pkg/model"
	"github.com/thanos-io/thanos/pkg/prober"
	"github.com/thanos-io/thanos/pkg/runutil"
	grpcserver "github.com/thanos-io/thanos/pkg/server/grpc"
	httpserver "github.com/thanos-io/thanos/pkg/server/http"
	"github.com/thanos-io/thanos/pkg/store"
	storecache "github.com/thanos-io/thanos/pkg/store/cache"
	"github.com/thanos-io/thanos/pkg/store/labelpb"
	"github.com/thanos-io/thanos/pkg/tls"
	"github.com/thanos-io/thanos/pkg/ui"
)

const (
	retryTimeoutDuration  = 30
	retryIntervalDuration = 10
)

type syncStrategy string

const (
	concurrentDiscovery syncStrategy = "concurrent"
	recursiveDiscovery  syncStrategy = "recursive"
)

type storeConfig struct {
	indexCacheConfigs           extflag.PathOrContent
	objStoreConfig              extflag.PathOrContent
	dataDir                     string
	cacheIndexHeader            bool
	grpcConfig                  grpcConfig
	httpConfig                  httpConfig
	indexCacheSizeBytes         units.Base2Bytes
	chunkPoolSize               units.Base2Bytes
	estimatedMaxSeriesSize      uint64
	estimatedMaxChunkSize       uint64
	seriesBatchSize             int
	storeRateLimits             store.SeriesSelectLimits
	maxDownloadedBytes          units.Base2Bytes
	maxConcurrency              int
	component                   component.StoreAPI
	debugLogging                bool
	syncInterval                time.Duration
	blockListStrategy           string
	blockSyncConcurrency        int
	blockMetaFetchConcurrency   int
	filterConf                  *store.FilterConfig
	selectorRelabelConf         extflag.PathOrContent
	advertiseCompatibilityLabel bool
	consistencyDelay            commonmodel.Duration
	ignoreDeletionMarksDelay    commonmodel.Duration
	disableWeb                  bool
	webConfig                   webConfig
	label                       string
	postingOffsetsInMemSampling int
	cachingBucketConfig         extflag.PathOrContent
	reqLogConfig                *extflag.PathOrContent
	lazyIndexReaderEnabled      bool
	lazyIndexReaderIdleTimeout  time.Duration
	lazyExpandedPostingsEnabled bool

	indexHeaderLazyDownloadStrategy string
}

func (sc *storeConfig) registerFlag(cmd extkingpin.FlagClause) {
	sc.httpConfig = *sc.httpConfig.registerFlag(cmd)
	sc.grpcConfig = *sc.grpcConfig.registerFlag(cmd)
	sc.storeRateLimits.RegisterFlags(cmd)

	cmd.Flag("data-dir", "Local data directory used for caching purposes (index-header, in-mem cache items and meta.jsons). If removed, no data will be lost, just store will have to rebuild the cache. NOTE: Putting raw blocks here will not cause the store to read them. For such use cases use Prometheus + sidecar. Ignored if --no-cache-index-header option is specified.").
		Default("./data").StringVar(&sc.dataDir)

	cmd.Flag("cache-index-header", "Cache TSDB index-headers on disk to reduce startup time. When set to true, Thanos Store will download index headers from remote object storage on startup and create a header file on disk. Use --data-dir to set the directory in which index headers will be downloaded.").
		Default("true").BoolVar(&sc.cacheIndexHeader)

	cmd.Flag("index-cache-size", "Maximum size of items held in the in-memory index cache. Ignored if --index-cache.config or --index-cache.config-file option is specified.").
		Default("250MB").BytesVar(&sc.indexCacheSizeBytes)

	sc.indexCacheConfigs = *extflag.RegisterPathOrContent(cmd, "index-cache.config",
		"YAML file that contains index cache configuration. See format details: https://thanos.io/tip/components/store.md/#index-cache",
		extflag.WithEnvSubstitution(),
	)

	sc.cachingBucketConfig = *extflag.RegisterPathOrContent(hidden.HiddenCmdClause(cmd), "store.caching-bucket.config",
		"YAML that contains configuration for caching bucket. Experimental feature, with high risk of changes. See format details: https://thanos.io/tip/components/store.md/#caching-bucket",
		extflag.WithEnvSubstitution(),
	)

	cmd.Flag("chunk-pool-size", "Maximum size of concurrently allocatable bytes reserved strictly to reuse for chunks in memory.").
		Default("2GB").BytesVar(&sc.chunkPoolSize)

	cmd.Flag("store.grpc.touched-series-limit", "DEPRECATED: use store.limits.request-series.").Default("0").Uint64Var(&sc.storeRateLimits.SeriesPerRequest)
	cmd.Flag("store.grpc.series-sample-limit", "DEPRECATED: use store.limits.request-samples.").Default("0").Uint64Var(&sc.storeRateLimits.SamplesPerRequest)

	cmd.Flag("store.grpc.downloaded-bytes-limit",
		"Maximum amount of downloaded (either fetched or touched) bytes in a single Series/LabelNames/LabelValues call. The Series call fails if this limit is exceeded. 0 means no limit.").
		Default("0").BytesVar(&sc.maxDownloadedBytes)

	cmd.Flag("store.grpc.series-max-concurrency", "Maximum number of concurrent Series calls.").Default("20").IntVar(&sc.maxConcurrency)

	sc.component = component.Store

	sc.objStoreConfig = *extkingpin.RegisterCommonObjStoreFlags(cmd, "", true)

	cmd.Flag("sync-block-duration", "Repeat interval for syncing the blocks between local and remote view.").
		Default("15m").DurationVar(&sc.syncInterval)

	strategies := strings.Join([]string{string(concurrentDiscovery), string(recursiveDiscovery)}, ", ")
	cmd.Flag("block-discovery-strategy", "One of "+strategies+". When set to concurrent, stores will concurrently issue one call per directory to discover active blocks in the bucket. The recursive strategy iterates through all objects in the bucket, recursively traversing into each directory. This avoids N+1 calls at the expense of having slower bucket iterations.").
		Default(string(concurrentDiscovery)).StringVar(&sc.blockListStrategy)

	cmd.Flag("block-sync-concurrency", "Number of goroutines to use when constructing index-cache.json blocks from object storage. Must be equal or greater than 1.").
		Default("20").IntVar(&sc.blockSyncConcurrency)

	cmd.Flag("block-meta-fetch-concurrency", "Number of goroutines to use when fetching block metadata from object storage.").
		Default("32").IntVar(&sc.blockMetaFetchConcurrency)

	cmd.Flag("debug.series-batch-size", "The batch size when fetching series from TSDB blocks. Setting the number too high can lead to slower retrieval, while setting it too low can lead to throttling caused by too many calls made to object storage.").
		Hidden().Default(strconv.Itoa(store.SeriesBatchSize)).IntVar(&sc.seriesBatchSize)

	cmd.Flag("debug.estimated-max-series-size", "Estimated max series size. Setting a value might result in over fetching data while a small value might result in data refetch. Default value is 64KB.").
		Hidden().Default(strconv.Itoa(store.EstimatedMaxSeriesSize)).Uint64Var(&sc.estimatedMaxSeriesSize)

	cmd.Flag("debug.estimated-max-chunk-size", "Estimated max chunk size. Setting a value might result in over fetching data while a small value might result in data refetch. Default value is 16KiB.").
		Hidden().Default(strconv.Itoa(store.EstimatedMaxChunkSize)).Uint64Var(&sc.estimatedMaxChunkSize)

	sc.filterConf = &store.FilterConfig{}

	cmd.Flag("min-time", "Start of time range limit to serve. Thanos Store will serve only metrics, which happened later than this value. Option can be a constant time in RFC3339 format or time duration relative to current time, such as -1d or 2h45m. Valid duration units are ms, s, m, h, d, w, y.").
		Default("0000-01-01T00:00:00Z").SetValue(&sc.filterConf.MinTime)

	cmd.Flag("max-time", "End of time range limit to serve. Thanos Store will serve only blocks, which happened earlier than this value. Option can be a constant time in RFC3339 format or time duration relative to current time, such as -1d or 2h45m. Valid duration units are ms, s, m, h, d, w, y.").
		Default("9999-12-31T23:59:59Z").SetValue(&sc.filterConf.MaxTime)

	cmd.Flag("debug.advertise-compatibility-label", "If true, Store Gateway in addition to other labels, will advertise special \"@thanos_compatibility_store_type=store\" label set. This makes store Gateway compatible with Querier before 0.8.0").
		Hidden().Default("true").BoolVar(&sc.advertiseCompatibilityLabel)

	sc.selectorRelabelConf = *extkingpin.RegisterSelectorRelabelFlags(cmd)

	cmd.Flag("store.index-header-posting-offsets-in-mem-sampling", "Controls what is the ratio of postings offsets store will hold in memory. "+
		"Larger value will keep less offsets, which will increase CPU cycles needed for query touching those postings. It's meant for setups that want low baseline memory pressure and where less traffic is expected. "+
		"On the contrary, smaller value will increase baseline memory usage, but improve latency slightly. 1 will keep all in memory. Default value is the same as in Prometheus which gives a good balance.").
		Hidden().Default(fmt.Sprintf("%v", store.DefaultPostingOffsetInMemorySampling)).IntVar(&sc.postingOffsetsInMemSampling)

	cmd.Flag("consistency-delay", "Minimum age of all blocks before they are being read. Set it to safe value (e.g 30m) if your object storage is eventually consistent. GCS and S3 are (roughly) strongly consistent.").
		Default("0s").SetValue(&sc.consistencyDelay)

	cmd.Flag("ignore-deletion-marks-delay", "Duration after which the blocks marked for deletion will be filtered out while fetching blocks. "+
		"The idea of ignore-deletion-marks-delay is to ignore blocks that are marked for deletion with some delay. This ensures store can still serve blocks that are meant to be deleted but do not have a replacement yet. "+
		"If delete-delay duration is provided to compactor or bucket verify component, it will upload deletion-mark.json file to mark after what duration the block should be deleted rather than deleting the block straight away. "+
		"If delete-delay is non-zero for compactor or bucket verify component, ignore-deletion-marks-delay should be set to (delete-delay)/2 so that blocks marked for deletion are filtered out while fetching blocks before being deleted from bucket. "+
		"Default is 24h, half of the default value for --delete-delay on compactor.").
		Default("24h").SetValue(&sc.ignoreDeletionMarksDelay)

	cmd.Flag("store.enable-index-header-lazy-reader", "If true, Store Gateway will lazy memory map index-header only once the block is required by a query.").
		Default("false").BoolVar(&sc.lazyIndexReaderEnabled)

	cmd.Flag("store.index-header-lazy-reader-idle-timeout", "If index-header lazy reader is enabled and this idle timeout setting is > 0, memory map-ed index-headers will be automatically released after 'idle timeout' inactivity.").
		Hidden().Default("5m").DurationVar(&sc.lazyIndexReaderIdleTimeout)

	cmd.Flag("store.enable-lazy-expanded-postings", "If true, Store Gateway will estimate postings size and try to lazily expand postings if it downloads less data than expanding all postings.").
		Default("false").BoolVar(&sc.lazyExpandedPostingsEnabled)

	cmd.Flag("store.index-header-lazy-download-strategy", "Strategy of how to download index headers lazily. Supported values: eager, lazy. If eager, always download index header during initial load. If lazy, download index header during query time.").
		Default(string(indexheader.EagerDownloadStrategy)).
		EnumVar(&sc.indexHeaderLazyDownloadStrategy, string(indexheader.EagerDownloadStrategy), string(indexheader.LazyDownloadStrategy))

	cmd.Flag("web.disable", "Disable Block Viewer UI.").Default("false").BoolVar(&sc.disableWeb)

	cmd.Flag("web.external-prefix", "Static prefix for all HTML links and redirect URLs in the bucket web UI interface. Actual endpoints are still served on / or the web.route-prefix. This allows thanos bucket web UI to be served behind a reverse proxy that strips a URL sub-path.").
		Default("").StringVar(&sc.webConfig.externalPrefix)

	cmd.Flag("web.prefix-header", "Name of HTTP request header used for dynamic prefixing of UI links and redirects. This option is ignored if web.external-prefix argument is set. Security risk: enable this option only if a reverse proxy in front of thanos is resetting the header. The --web.prefix-header=X-Forwarded-Prefix option can be useful, for example, if Thanos UI is served via Traefik reverse proxy with PathPrefixStrip option enabled, which sends the stripped prefix value in X-Forwarded-Prefix header. This allows thanos UI to be served on a sub-path.").
		Default("").StringVar(&sc.webConfig.prefixHeaderName)

	cmd.Flag("web.disable-cors", "Whether to disable CORS headers to be set by Thanos. By default Thanos sets CORS headers to be allowed by all.").
		Default("false").BoolVar(&sc.webConfig.disableCORS)

	cmd.Flag("bucket-web-label", "External block label to use as group title in the bucket web UI").StringVar(&sc.label)

	sc.reqLogConfig = extkingpin.RegisterRequestLoggingFlags(cmd)
}

// registerStore registers a store command.
func registerStore(app *extkingpin.App) {
	cmd := app.Command(component.Store.String(), "Store node giving access to blocks in a bucket provider. Now supported GCS, S3, Azure, Swift, Tencent COS and Aliyun OSS.")

	conf := &storeConfig{}
	conf.registerFlag(cmd)

	cmd.Setup(func(g *run.Group, logger log.Logger, reg *prometheus.Registry, tracer opentracing.Tracer, _ <-chan struct{}, debugLogging bool) error {
		if conf.filterConf.MinTime.PrometheusTimestamp() > conf.filterConf.MaxTime.PrometheusTimestamp() {
			return errors.Errorf("invalid argument: --min-time '%s' can't be greater than --max-time '%s'",
				conf.filterConf.MinTime, conf.filterConf.MaxTime)
		}

		httpLogOpts, err := logging.ParseHTTPOptions(conf.reqLogConfig)
		if err != nil {
			return errors.Wrap(err, "error while parsing config for request logging")
		}

		tagOpts, grpcLogOpts, err := logging.ParsegRPCOptions(conf.reqLogConfig)
		if err != nil {
			return errors.Wrap(err, "error while parsing config for request logging")
		}

		conf.debugLogging = debugLogging

		return runStore(g,
			logger,
			reg,
			tracer,
			httpLogOpts,
			grpcLogOpts,
			tagOpts,
			*conf,
			getFlagsMap(cmd.Flags()),
		)
	})
}

// runStore starts a daemon that serves queries to cluster peers using data from an object store.
func runStore(
	g *run.Group,
	logger log.Logger,
	reg *prometheus.Registry,
	tracer opentracing.Tracer,
	httpLogOpts []logging.Option,
	grpcLogOpts []grpclogging.Option,
	tagOpts []tags.Option,
	conf storeConfig,
	flagsMap map[string]string,
) error {
	dataDir := conf.dataDir
	if !conf.cacheIndexHeader {
		dataDir = ""
	}

	grpcProbe := prober.NewGRPC()
	httpProbe := prober.NewHTTP()
	statusProber := prober.Combine(
		httpProbe,
		grpcProbe,
		prober.NewInstrumentation(conf.component, logger, extprom.WrapRegistererWithPrefix("thanos_", reg)),
	)

	srv := httpserver.New(logger, reg, conf.component, httpProbe,
		httpserver.WithListen(conf.httpConfig.bindAddress),
		httpserver.WithGracePeriod(time.Duration(conf.httpConfig.gracePeriod)),
		httpserver.WithTLSConfig(conf.httpConfig.tlsConfig),
		httpserver.WithEnableH2C(true), // For groupcache.
	)

	g.Add(func() error {
		statusProber.Healthy()

		return srv.ListenAndServe()
	}, func(err error) {
		statusProber.NotReady(err)
		defer statusProber.NotHealthy(err)

		srv.Shutdown(err)
	})

	confContentYaml, err := conf.objStoreConfig.Content()
	if err != nil {
		return err
	}

	bkt, err := client.NewBucket(logger, confContentYaml, conf.component.String())
	if err != nil {
		return err
	}
	insBkt := objstoretracing.WrapWithTraces(objstore.WrapWithMetrics(bkt, extprom.WrapRegistererWithPrefix("thanos_", reg), bkt.Name()))

	cachingBucketConfigYaml, err := conf.cachingBucketConfig.Content()
	if err != nil {
		return errors.Wrap(err, "get caching bucket configuration")
	}

	r := route.New()

	if len(cachingBucketConfigYaml) > 0 {
		insBkt, err = storecache.NewCachingBucketFromYaml(cachingBucketConfigYaml, insBkt, logger, reg, r, conf.cachingBucketConfig.Path())
		if err != nil {
			return errors.Wrap(err, "create caching bucket")
		}
	}

	relabelContentYaml, err := conf.selectorRelabelConf.Content()
	if err != nil {
		return errors.Wrap(err, "get content of relabel configuration")
	}

	relabelConfig, err := block.ParseRelabelConfig(relabelContentYaml, block.SelectorSupportedRelabelActions)
	if err != nil {
		return err
	}

	indexCacheContentYaml, err := conf.indexCacheConfigs.Content()
	if err != nil {
		return errors.Wrap(err, "get content of index cache configuration")
	}

	// Create the index cache loading its config from config file, while keeping
	// backward compatibility with the pre-config file era.
	var indexCache storecache.IndexCache
	if len(indexCacheContentYaml) > 0 {
		indexCache, err = storecache.NewIndexCache(logger, indexCacheContentYaml, reg)
	} else {
		indexCache, err = storecache.NewInMemoryIndexCacheWithConfig(logger, nil, reg, storecache.InMemoryIndexCacheConfig{
			MaxSize:     model.Bytes(conf.indexCacheSizeBytes),
			MaxItemSize: storecache.DefaultInMemoryIndexCacheConfig.MaxItemSize,
		})
	}
	if err != nil {
		return errors.Wrap(err, "create index cache")
	}

	var blockLister block.Lister
	switch syncStrategy(conf.blockListStrategy) {
	case concurrentDiscovery:
		blockLister = block.NewConcurrentLister(logger, insBkt)
	case recursiveDiscovery:
		blockLister = block.NewRecursiveLister(logger, insBkt)
	default:
		return errors.Errorf("unknown sync strategy %s", conf.blockListStrategy)
	}
	ignoreDeletionMarkFilter := block.NewIgnoreDeletionMarkFilter(logger, insBkt, time.Duration(conf.ignoreDeletionMarksDelay), conf.blockMetaFetchConcurrency)
	metaFetcher, err := block.NewMetaFetcher(logger, conf.blockMetaFetchConcurrency, insBkt, blockLister, dataDir, extprom.WrapRegistererWithPrefix("thanos_", reg),
		[]block.MetadataFilter{
			block.NewTimePartitionMetaFilter(conf.filterConf.MinTime, conf.filterConf.MaxTime),
			block.NewLabelShardedMetaFilter(relabelConfig),
			block.NewConsistencyDelayMetaFilter(logger, time.Duration(conf.consistencyDelay), extprom.WrapRegistererWithPrefix("thanos_", reg)),
			ignoreDeletionMarkFilter,
			block.NewDeduplicateFilter(conf.blockMetaFetchConcurrency),
		})
	if err != nil {
		return errors.Wrap(err, "meta fetcher")
	}

	// Limit the concurrency on queries against the Thanos store.
	if conf.maxConcurrency < 0 {
		return errors.Errorf("max concurrency value cannot be lower than 0 (got %v)", conf.maxConcurrency)
	}

	queriesGate := gate.New(extprom.WrapRegistererWithPrefix("thanos_bucket_store_series_", reg), int(conf.maxConcurrency), gate.Queries)

	chunkPool, err := store.NewDefaultChunkBytesPool(uint64(conf.chunkPoolSize))
	if err != nil {
		return errors.Wrap(err, "create chunk pool")
	}

	options := []store.BucketStoreOption{
		store.WithLogger(logger),
		store.WithRegistry(reg),
		store.WithIndexCache(indexCache),
		store.WithQueryGate(queriesGate),
		store.WithChunkPool(chunkPool),
		store.WithFilterConfig(conf.filterConf),
		store.WithChunkHashCalculation(true),
		store.WithSeriesBatchSize(conf.seriesBatchSize),
		store.WithBlockEstimatedMaxSeriesFunc(func(m metadata.Meta) uint64 {
			if m.Thanos.IndexStats.SeriesMaxSize > 0 &&
				uint64(m.Thanos.IndexStats.SeriesMaxSize) < conf.estimatedMaxSeriesSize {
				return uint64(m.Thanos.IndexStats.SeriesMaxSize)
			}
			return conf.estimatedMaxSeriesSize
		}),
		store.WithBlockEstimatedMaxChunkFunc(func(m metadata.Meta) uint64 {
			if m.Thanos.IndexStats.ChunkMaxSize > 0 &&
				uint64(m.Thanos.IndexStats.ChunkMaxSize) < conf.estimatedMaxChunkSize {
				return uint64(m.Thanos.IndexStats.ChunkMaxSize)
			}
			return conf.estimatedMaxChunkSize
		}),
		store.WithLazyExpandedPostings(conf.lazyExpandedPostingsEnabled),
		store.WithIndexHeaderLazyDownloadStrategy(
			indexheader.IndexHeaderLazyDownloadStrategy(conf.indexHeaderLazyDownloadStrategy).StrategyToDownloadFunc(),
		),
	}

	if conf.debugLogging {
		options = append(options, store.WithDebugLogging())
	}

	bs, err := store.NewBucketStore(
		insBkt,
		metaFetcher,
		dataDir,
		store.NewChunksLimiterFactory(conf.storeRateLimits.SamplesPerRequest/store.MaxSamplesPerChunk), // The samples limit is an approximation based on the max number of samples per chunk.
		store.NewSeriesLimiterFactory(conf.storeRateLimits.SeriesPerRequest),
		store.NewBytesLimiterFactory(conf.maxDownloadedBytes),
		store.NewGapBasedPartitioner(store.PartitionerMaxGapSize),
		conf.blockSyncConcurrency,
		conf.advertiseCompatibilityLabel,
		conf.postingOffsetsInMemSampling,
		false,
		conf.lazyIndexReaderEnabled,
		conf.lazyIndexReaderIdleTimeout,
		options...,
	)
	if err != nil {
		return errors.Wrap(err, "create object storage store")
	}

	// bucketStoreReady signals when bucket store is ready.
	bucketStoreReady := make(chan struct{})
	{
		ctx, cancel := context.WithCancel(context.Background())
		g.Add(func() error {
			defer runutil.CloseWithLogOnErr(logger, insBkt, "bucket client")

			level.Info(logger).Log("msg", "initializing bucket store")
			begin := time.Now()

			// This will stop retrying after set timeout duration.
			initialSyncCtx, cancel := context.WithTimeout(ctx, retryTimeoutDuration*time.Second)
			defer cancel()

			// Retry in case of error.
			err := runutil.Retry(retryIntervalDuration*time.Second, initialSyncCtx.Done(), func() error {
				return bs.InitialSync(ctx)
			})

			if err != nil {
				close(bucketStoreReady)
				return errors.Wrap(err, "bucket store initial sync")
			}

			level.Info(logger).Log("msg", "bucket store ready", "init_duration", time.Since(begin).String())
			close(bucketStoreReady)

			err = runutil.Repeat(conf.syncInterval, ctx.Done(), func() error {
				if err := bs.SyncBlocks(ctx); err != nil {
					level.Warn(logger).Log("msg", "syncing blocks failed", "err", err)
				}
				return nil
			})

			runutil.CloseWithLogOnErr(logger, bs, "bucket store")
			return err
		}, func(error) {
			cancel()
		})
	}

	infoSrv := info.NewInfoServer(
		component.Store.String(),
		info.WithLabelSetFunc(func() []labelpb.ZLabelSet {
			return bs.LabelSet()
		}),
		info.WithStoreInfoFunc(func() (*infopb.StoreInfo, error) {
			if httpProbe.IsReady() {
				mint, maxt := bs.TimeRange()
				return &infopb.StoreInfo{
					MinTime:                      mint,
					MaxTime:                      maxt,
					SupportsSharding:             true,
					SupportsWithoutReplicaLabels: true,
					TsdbInfos:                    bs.TSDBInfos(),
				}, nil
			}
			return nil, errors.New("Not ready")
		}),
	)

	// Start query (proxy) gRPC StoreAPI.
	{
		tlsCfg, err := tls.NewServerConfig(log.With(logger, "protocol", "gRPC"), conf.grpcConfig.tlsSrvCert, conf.grpcConfig.tlsSrvKey, conf.grpcConfig.tlsSrvClientCA)
		if err != nil {
			return errors.Wrap(err, "setup gRPC server")
		}

		storeServer := store.NewInstrumentedStoreServer(reg, bs)
		s := grpcserver.New(logger, reg, tracer, grpcLogOpts, tagOpts, conf.component, grpcProbe,
			grpcserver.WithServer(store.RegisterStoreServer(storeServer, logger)),
			grpcserver.WithServer(info.RegisterInfoServer(infoSrv)),
			grpcserver.WithListen(conf.grpcConfig.bindAddress),
			grpcserver.WithGracePeriod(conf.grpcConfig.gracePeriod),
			grpcserver.WithMaxConnAge(conf.grpcConfig.maxConnectionAge),
			grpcserver.WithTLSConfig(tlsCfg),
		)

		g.Add(func() error {
			<-bucketStoreReady
			statusProber.Ready()
			return s.ListenAndServe()
		}, func(err error) {
			statusProber.NotReady(err)
			s.Shutdown(err)
		})
	}

	// Add bucket UI for loaded blocks.
	{
		ins := extpromhttp.NewInstrumentationMiddleware(reg, nil)

		if !conf.disableWeb {
			compactorView := ui.NewBucketUI(logger, conf.webConfig.externalPrefix, conf.webConfig.prefixHeaderName, conf.component)
			compactorView.Register(r, ins)

			// Configure Request Logging for HTTP calls.
			logMiddleware := logging.NewHTTPServerMiddleware(logger, httpLogOpts...)
			api := blocksAPI.NewBlocksAPI(logger, conf.webConfig.disableCORS, conf.label, flagsMap, insBkt)
			api.Register(r.WithPrefix("/api/v1"), tracer, logger, ins, logMiddleware)

			metaFetcher.UpdateOnChange(func(blocks []metadata.Meta, err error) {
				api.SetLoaded(blocks, err)
			})
		}

		srv.Handle("/", r)
	}

	level.Info(logger).Log("msg", "starting store node")
	return nil
}