[#1029] metabase: Add refill metrics

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

internal/logs/logs.go

@@ -579,6 +579,8 @@ const (
 	EngineShardsEvacuationFailedToMoveTree                                  = "failed to evacuate tree to other node"
 	EngineShardsEvacuationTreeEvacuatedLocal                                = "tree evacuated to local node"
 	EngineShardsEvacuationTreeEvacuatedRemote                               = "tree evacuated to other node"
+	EngineRefillFailedToGetObjectsCount                                     = "failed to get blobstor objects count, no resync percent estimation is available"
+	BlobstoreFailedToGetFileinfo                                            = "failed to get file info"
 	ECFailedToSendToContainerNode                                           = "failed to send EC object to container node"
 	ECFailedToSaveECPart                                                    = "failed to save EC part"
 )

pkg/local_object_storage/blobovnicza/control.go

@@ -101,6 +101,10 @@ func (b *Blobovnicza) Init() error {
 	return b.initializeCounters()
 }
 
+func (b *Blobovnicza) ObjectsCount() uint64 {
+	return b.itemsCount.Load()
+}
+
 func (b *Blobovnicza) initializeCounters() error {
 	var size uint64
 	var items uint64

pkg/local_object_storage/blobstor/blobovniczatree/count.go

@@ -0,0 +1,38 @@
+package blobovniczatree
+
+import (
+	"context"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+)
+
+func (b *Blobovniczas) ObjectsCount(ctx context.Context) (uint64, error) {
+	var (
+		success   bool
+		startedAt = time.Now()
+	)
+	defer func() {
+		b.metrics.ObjectsCount(time.Since(startedAt), success)
+	}()
+
+	_, span := tracing.StartSpanFromContext(ctx, "Blobovniczas.ObjectsCount")
+	defer span.End()
+
+	var result uint64
+	err := b.iterateExistingDBPaths(ctx, func(p string) (bool, error) {
+		shDB := b.getBlobovniczaWithoutCaching(p)
+		blz, err := shDB.Open()
+		if err != nil {
+			return true, err
+		}
+		defer shDB.Close()
+
+		result += blz.ObjectsCount()
+		return false, nil
+	})
+	if err != nil {
+		return 0, err
+	}
+	return result, nil
+}

pkg/local_object_storage/blobstor/blobovniczatree/metrics.go

@@ -24,6 +24,7 @@ type Metrics interface {
 	SetRebuildStatus(status string)
 	ObjectMoved(d time.Duration)
 	SetRebuildPercent(value uint32)
+	ObjectsCount(d time.Duration, success bool)
 
 	Delete(d time.Duration, success, withStorageID bool)
 	Exists(d time.Duration, success, withStorageID bool)
@@ -47,6 +48,7 @@ func (m *noopMetrics) GetRange(time.Duration, int, bool, bool) {}
 func (m *noopMetrics) Get(time.Duration, int, bool, bool)      {}
 func (m *noopMetrics) Iterate(time.Duration, bool)             {}
 func (m *noopMetrics) Put(time.Duration, int, bool)            {}
+func (m *noopMetrics) ObjectsCount(time.Duration, bool)        {}
 func (m *noopMetrics) Blobovnicza() blobovnicza.Metrics {
 	return &blobovnicza.NoopMetrics{}
 }

pkg/local_object_storage/blobstor/common/storage.go

@@ -15,6 +15,7 @@ type Storage interface {
 
 	Type() string
 	Path() string
+	ObjectsCount(ctx context.Context) (uint64, error)
 
 	SetCompressor(cc *compression.Config)
 	Compressor() *compression.Config

pkg/local_object_storage/blobstor/fstree/fstree.go

@@ -467,6 +467,45 @@ func (t *FSTree) countFiles() (uint64, error) {
 	return counter, nil
 }
 
+func (t *FSTree) ObjectsCount(ctx context.Context) (uint64, error) {
+	var (
+		startedAt = time.Now()
+		success   = false
+	)
+	defer func() {
+		t.metrics.ObjectsCount(time.Since(startedAt), success)
+	}()
+
+	ctx, span := tracing.StartSpanFromContext(ctx, "FSTree.ObjectsCount",
+		trace.WithAttributes(
+			attribute.String("path", t.RootPath),
+		))
+	defer span.End()
+
+	var result uint64
+
+	err := filepath.WalkDir(t.RootPath,
+		func(_ string, d fs.DirEntry, _ error) error {
+			select {
+			case <-ctx.Done():
+				return ctx.Err()
+			default:
+			}
+
+			if !d.IsDir() {
+				result++
+			}
+
+			return nil
+		},
+	)
+	if err != nil {
+		return 0, fmt.Errorf("could not walk through %s directory: %w", t.RootPath, err)
+	}
+	success = true
+	return result, nil
+}
+
 // Type is fstree storage type used in logs and configuration.
 const Type = "fstree"
 

pkg/local_object_storage/blobstor/fstree/metrics.go

@@ -14,6 +14,7 @@ type Metrics interface {
 	Put(d time.Duration, size int, success bool)
 	Get(d time.Duration, size int, success bool)
 	GetRange(d time.Duration, size int, success bool)
+	ObjectsCount(d time.Duration, success bool)
 }
 
 type noopMetrics struct{}
@@ -27,3 +28,4 @@ func (m *noopMetrics) Exists(time.Duration, bool)        {}
 func (m *noopMetrics) Put(time.Duration, int, bool)      {}
 func (m *noopMetrics) Get(time.Duration, int, bool)      {}
 func (m *noopMetrics) GetRange(time.Duration, int, bool) {}
+func (m *noopMetrics) ObjectsCount(time.Duration, bool)  {}

pkg/local_object_storage/blobstor/info.go

@@ -1,5 +1,14 @@
 package blobstor
 
+import (
+	"context"
+	"sync/atomic"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	"golang.org/x/sync/errgroup"
+)
+
 // DumpInfo returns information about blob stor.
 func (b *BlobStor) DumpInfo() Info {
 	b.modeMtx.RLock()
@@ -15,3 +24,39 @@ func (b *BlobStor) DumpInfo() Info {
 		SubStorages: sub,
 	}
 }
+
+// ObjectsCount returns Blobstore's total objects count.
+func (b *BlobStor) ObjectsCount(ctx context.Context) (uint64, error) {
+	var err error
+	startedAt := time.Now()
+	defer func() {
+		b.metrics.ObjectsCount(time.Since(startedAt), err == nil)
+	}()
+
+	ctx, span := tracing.StartSpanFromContext(ctx, "BlobStor.ObjectsCount")
+	defer span.End()
+
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
+	var result atomic.Uint64
+
+	eg, egCtx := errgroup.WithContext(ctx)
+	for i := range b.storage {
+		i := i
+		eg.Go(func() error {
+			v, e := b.storage[i].Storage.ObjectsCount(egCtx)
+			if e != nil {
+				return e
+			}
+			result.Add(v)
+			return nil
+		})
+	}
+
+	if err = eg.Wait(); err != nil {
+		return 0, err
+	}
+
+	return result.Load(), nil
+}

pkg/local_object_storage/blobstor/memstore/memstore.go

@@ -163,3 +163,10 @@ func (s *memstoreImpl) Iterate(_ context.Context, req common.IteratePrm) (common
 func (s *memstoreImpl) Rebuild(_ context.Context, _ common.RebuildPrm) (common.RebuildRes, error) {
 	return common.RebuildRes{}, nil
 }
+
+func (s *memstoreImpl) ObjectsCount(_ context.Context) (uint64, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	return uint64(len(s.objs)), nil
+}

pkg/local_object_storage/blobstor/metrics.go

@@ -13,6 +13,7 @@ type Metrics interface {
 	Get(d time.Duration, size int, success, withStorageID bool)
 	Iterate(d time.Duration, success bool)
 	Put(d time.Duration, size int, success bool)
+	ObjectsCount(d time.Duration, success bool)
 }
 
 type noopMetrics struct{}
@@ -26,3 +27,4 @@ func (m *noopMetrics) GetRange(time.Duration, int, bool, bool) {}
 func (m *noopMetrics) Get(time.Duration, int, bool, bool)      {}
 func (m *noopMetrics) Iterate(time.Duration, bool)             {}
 func (m *noopMetrics) Put(time.Duration, int, bool)            {}
+func (m *noopMetrics) ObjectsCount(time.Duration, bool)        {}

pkg/local_object_storage/blobstor/teststore/teststore.go

@@ -233,3 +233,10 @@ func (s *TestStore) SetParentID(string) {}
 func (s *TestStore) Rebuild(_ context.Context, _ common.RebuildPrm) (common.RebuildRes, error) {
 	return common.RebuildRes{}, nil
 }
+
+func (s *TestStore) ObjectsCount(ctx context.Context) (uint64, error) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	return s.st.ObjectsCount(ctx)
+}

pkg/local_object_storage/engine/metrics.go

@@ -27,6 +27,10 @@ type MetricRegister interface {
 	IncContainerObjectCounter(shardID, contID, objectType string)
 	SubContainerObjectCounter(shardID, contID, objectType string, v uint64)
 
+	IncRefillObjectsCount(shardID, path string, size int, success bool)
+	SetRefillPercent(shardID, path string, percent uint32)
+	SetRefillStatus(shardID, path, status string)
+
 	WriteCache() metrics.WriteCacheMetrics
 	GC() metrics.GCMetrics
 }

pkg/local_object_storage/engine/shards.go

@@ -85,6 +85,18 @@ func (m *metricsWithID) SubContainerObjectsCount(cnrID string, objectType string
 	m.mw.SubContainerObjectCounter(m.id, cnrID, objectType, value)
 }
 
+func (m *metricsWithID) IncRefillObjectsCount(path string, size int, success bool) {
+	m.mw.IncRefillObjectsCount(m.id, path, size, success)
+}
+
+func (m *metricsWithID) SetRefillPercent(path string, percent uint32) {
+	m.mw.SetRefillPercent(m.id, path, percent)
+}
+
+func (m *metricsWithID) SetRefillStatus(path string, status string) {
+	m.mw.SetRefillStatus(m.id, path, status)
+}
+
 // AddShard adds a new shard to the storage engine.
 //
 // Returns any error encountered that did not allow adding a shard.

pkg/local_object_storage/metrics/blobovnicza.go

@@ -87,6 +87,10 @@ func (m *blobovniczaTreeMetrics) Put(d time.Duration, size int, success bool) {
 	}
 }
 
+func (m *blobovniczaTreeMetrics) ObjectsCount(d time.Duration, success bool) {
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "ObjectsCount", d, success, metrics_impl.NullBool{})
+}
+
 type blobovniczaMetrics struct {
 	m       metrics_impl.BlobobvnizcaMetrics
 	shardID func() string

pkg/local_object_storage/metrics/blobstore.go

@@ -63,3 +63,7 @@ func (m *blobstoreMetrics) Put(d time.Duration, size int, success bool) {
 		m.m.AddPut(m.shardID, size)
 	}
 }
+
+func (m *blobstoreMetrics) ObjectsCount(d time.Duration, success bool) {
+	m.m.MethodDuration(m.shardID, "ObjectsCount", d, success, metrics_impl.NullBool{})
+}

pkg/local_object_storage/metrics/fstree.go

@@ -65,3 +65,7 @@ func (m *fstreeMetrics) GetRange(d time.Duration, size int, success bool) {
 		m.m.AddGet(m.shardID, m.path, size)
 	}
 }
+
+func (m *fstreeMetrics) ObjectsCount(d time.Duration, success bool) {
+	m.m.MethodDuration(m.shardID, m.path, "ObjectsCount", d, success)
+}

pkg/local_object_storage/shard/control.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"sync"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
@@ -181,47 +182,54 @@ func (s *Shard) Init(ctx context.Context) error {
 }
 
 func (s *Shard) refillMetabase(ctx context.Context) error {
+	path := s.metaBase.DumpInfo().Path
+	s.metricsWriter.SetRefillStatus(path, "running")
+	s.metricsWriter.SetRefillPercent(path, 0)
+	var success bool
+	defer func() {
+		if success {
+			s.metricsWriter.SetRefillStatus(path, "completed")
+		} else {
+			s.metricsWriter.SetRefillStatus(path, "failed")
+		}
+	}()
+
 	err := s.metaBase.Reset()
 	if err != nil {
 		return fmt.Errorf("could not reset metabase: %w", err)
 	}
 
+	withCount := true
+	totalObjects, err := s.blobStor.ObjectsCount(ctx)
+	if err != nil {
+		s.log.Warn(logs.EngineRefillFailedToGetObjectsCount, zap.Error(err))
+		withCount = false
+	}
+
 	eg, egCtx := errgroup.WithContext(ctx)
 	if s.cfg.refillMetabaseWorkersCount > 0 {
 		eg.SetLimit(s.cfg.refillMetabaseWorkersCount)
 	}
 
+	var completedCount uint64
+	var metricGuard sync.Mutex
 	itErr := blobstor.IterateBinaryObjects(egCtx, s.blobStor, func(addr oid.Address, data []byte, descriptor []byte) error {
 		eg.Go(func() error {
-			obj := objectSDK.New()
-			if err := obj.Unmarshal(data); err != nil {
-				s.log.Warn(logs.ShardCouldNotUnmarshalObject,
-					zap.Stringer("address", addr),
-					zap.String("err", err.Error()))
-				return nil
-			}
+			var success bool
+			defer func() {
+				s.metricsWriter.IncRefillObjectsCount(path, len(data), success)
+				if withCount {
+					metricGuard.Lock()
+					completedCount++
+					s.metricsWriter.SetRefillPercent(path, uint32(completedCount*100/totalObjects))
+					metricGuard.Unlock()
+				}
+			}()
 
-			var err error
-			switch obj.Type() {
-			case objectSDK.TypeTombstone:
-				err = s.refillTombstoneObject(egCtx, obj)
-			case objectSDK.TypeLock:
-				err = s.refillLockObject(egCtx, obj)
-			default:
-			}
-			if err != nil {
+			if err := s.refillObject(egCtx, data, addr, descriptor); err != nil {
 				return err
 			}
-
-			var mPrm meta.PutPrm
-			mPrm.SetObject(obj)
-			mPrm.SetStorageID(descriptor)
-
-			_, err = s.metaBase.Put(egCtx, mPrm)
-			if err != nil && !client.IsErrObjectAlreadyRemoved(err) && !errors.Is(err, meta.ErrObjectIsExpired) {
-				return err
-			}
-
+			success = true
 			return nil
 		})
 
@@ -245,6 +253,40 @@ func (s *Shard) refillMetabase(ctx context.Context) error {
 		return fmt.Errorf("could not sync object counters: %w", err)
 	}
 
+	success = true
+	s.metricsWriter.SetRefillPercent(path, 100)
+	return nil
+}
+
+func (s *Shard) refillObject(ctx context.Context, data []byte, addr oid.Address, descriptor []byte) error {
+	obj := objectSDK.New()
+	if err := obj.Unmarshal(data); err != nil {
+		s.log.Warn(logs.ShardCouldNotUnmarshalObject,
+			zap.Stringer("address", addr),
+			zap.String("err", err.Error()))
+		return nil
+	}
+
+	var err error
+	switch obj.Type() {
+	case objectSDK.TypeTombstone:
+		err = s.refillTombstoneObject(ctx, obj)
+	case objectSDK.TypeLock:
+		err = s.refillLockObject(ctx, obj)
+	default:
+	}
+	if err != nil {
+		return err
+	}
+
+	var mPrm meta.PutPrm
+	mPrm.SetObject(obj)
+	mPrm.SetStorageID(descriptor)
+
+	_, err = s.metaBase.Put(ctx, mPrm)
+	if err != nil && !client.IsErrObjectAlreadyRemoved(err) && !errors.Is(err, meta.ErrObjectIsExpired) {
+		return err
+	}
 	return nil
 }
 

pkg/local_object_storage/shard/control_test.go

@@ -126,11 +126,15 @@ func TestRefillMetabaseCorrupted(t *testing.T) {
 		}),
 	}
 
+	mm := NewMetricStore()
+
 	sh := New(
 		WithID(NewIDFromBytes([]byte{})),
 		WithBlobStorOptions(blobOpts...),
 		WithPiloramaOptions(pilorama.WithPath(filepath.Join(dir, "pilorama"))),
-		WithMetaBaseOptions(meta.WithPath(filepath.Join(dir, "meta")), meta.WithEpochState(epochState{})))
+		WithMetaBaseOptions(meta.WithPath(filepath.Join(dir, "meta")), meta.WithEpochState(epochState{})),
+		WithMetricsWriter(mm),
+	)
 	require.NoError(t, sh.Open(context.Background()))
 	require.NoError(t, sh.Init(context.Background()))
 
@@ -157,7 +161,8 @@ func TestRefillMetabaseCorrupted(t *testing.T) {
 		WithBlobStorOptions(blobOpts...),
 		WithPiloramaOptions(pilorama.WithPath(filepath.Join(dir, "pilorama"))),
 		WithMetaBaseOptions(meta.WithPath(filepath.Join(dir, "meta_new")), meta.WithEpochState(epochState{})),
-		WithRefillMetabase(true))
+		WithRefillMetabase(true),
+		WithMetricsWriter(mm))
 	require.NoError(t, sh.Open(context.Background()))
 	require.NoError(t, sh.Init(context.Background()))
 
@@ -185,6 +190,8 @@ func TestRefillMetabase(t *testing.T) {
 		}),
 	}
 
+	mm := NewMetricStore()
+
 	sh := New(
 		WithID(NewIDFromBytes([]byte{})),
 		WithBlobStorOptions(blobOpts...),
@@ -194,6 +201,7 @@ func TestRefillMetabase(t *testing.T) {
 		),
 		WithPiloramaOptions(
 			pilorama.WithPath(filepath.Join(p, "pilorama"))),
+		WithMetricsWriter(mm),
 	)
 
 	// open Blobstor
@@ -362,6 +370,7 @@ func TestRefillMetabase(t *testing.T) {
 		),
 		WithPiloramaOptions(
 			pilorama.WithPath(filepath.Join(p, "pilorama_another"))),
+		WithMetricsWriter(mm),
 	)
 
 	// open Blobstor
@@ -389,4 +398,7 @@ func TestRefillMetabase(t *testing.T) {
 	checkObj(object.AddressOf(tombObj), tombObj)
 	checkTombMembers(true)
 	checkLocked(t, cnrLocked, locked)
+	require.Equal(t, int64(len(mObjs)+2), mm.refillCount) // 1 lock + 1 tomb
+	require.Equal(t, "completed", mm.refillStatus)
+	require.Equal(t, uint32(100), mm.refillPercent)
 }

pkg/local_object_storage/shard/metrics_test.go

@@ -21,13 +21,28 @@ import (
 )
 
 type metricsStore struct {
-	mtx         sync.Mutex
-	objCounters map[string]uint64
-	cnrSize     map[string]int64
-	cnrCount    map[string]uint64
-	pldSize     int64
-	mode        mode.Mode
-	errCounter  int64
+	mtx           sync.Mutex
+	objCounters   map[string]uint64
+	cnrSize       map[string]int64
+	cnrCount      map[string]uint64
+	pldSize       int64
+	mode          mode.Mode
+	errCounter    int64
+	refillCount   int64
+	refillSize    int64
+	refillPercent uint32
+	refillStatus  string
+}
+
+func NewMetricStore() *metricsStore {
+	return &metricsStore{
+		objCounters: map[string]uint64{
+			"phy":   0,
+			"logic": 0,
+		},
+		cnrSize:  make(map[string]int64),
+		cnrCount: make(map[string]uint64),
+	}
 }
 
 func (m *metricsStore) SetShardID(_ string) {}
@@ -155,6 +170,28 @@ func (m *metricsStore) getContainerCount(cnrID, objectType string) (uint64, bool
 	return v, ok
 }
 
+func (m *metricsStore) IncRefillObjectsCount(_ string, size int, success bool) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	m.refillCount++
+	m.refillSize += int64(size)
+}
+
+func (m *metricsStore) SetRefillPercent(_ string, percent uint32) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	m.refillPercent = percent
+}
+
+func (m *metricsStore) SetRefillStatus(_ string, status string) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+
+	m.refillStatus = status
+}
+
 func TestCounters(t *testing.T) {
 	t.Parallel()
 
@@ -361,14 +398,7 @@ func shardWithMetrics(t *testing.T, path string) (*Shard, *metricsStore) {
 		}),
 	}
 
-	mm := &metricsStore{
-		objCounters: map[string]uint64{
-			"phy":   0,
-			"logic": 0,
-		},
-		cnrSize:  make(map[string]int64),
-		cnrCount: make(map[string]uint64),
-	}
+	mm := NewMetricStore()
 
 	sh := New(
 		WithID(NewIDFromBytes([]byte{})),

pkg/local_object_storage/shard/reload_test.go

@@ -51,6 +51,7 @@ func TestShardReload(t *testing.T) {
 		WithMetaBaseOptions(metaOpts...),
 		WithPiloramaOptions(
 			pilorama.WithPath(filepath.Join(p, "pilorama"))),
+		WithMetricsWriter(NewMetricStore()),
 	}
 
 	sh := New(opts...)

pkg/local_object_storage/shard/shard.go

@@ -90,6 +90,12 @@ type MetricsWriter interface {
 	IncContainerObjectsCount(cnrID string, objectType string)
 	// SubContainerObjectsCount subtracts container object count.
 	SubContainerObjectsCount(cnrID string, objectType string, value uint64)
+	// IncRefillObjectsCount increments refill objects count.
+	IncRefillObjectsCount(path string, size int, success bool)
+	// SetRefillPercent sets refill percent.
+	SetRefillPercent(path string, percent uint32)
+	// SetRefillStatus sets refill status.
+	SetRefillStatus(path string, status string)
 }
 
 type cfg struct {

pkg/metrics/engine.go

@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"strconv"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
@@ -23,6 +24,9 @@ type EngineMetrics interface {
 	SetContainerObjectCounter(shardID, contID, objectType string, v uint64)
 	IncContainerObjectCounter(shardID, contID, objectType string)
 	SubContainerObjectCounter(shardID, contID, objectType string, v uint64)
+	IncRefillObjectsCount(shardID, path string, size int, success bool)
+	SetRefillPercent(shardID, path string, percent uint32)
+	SetRefillStatus(shardID, path, status string)
 
 	WriteCache() WriteCacheMetrics
 	GC() GCMetrics
@@ -37,6 +41,11 @@ type engineMetrics struct {
 	mode           *shardIDModeValue
 	contObjCounter *prometheus.GaugeVec
 
+	refillStatus         *shardIDPathModeValue
+	refillObjCounter     *prometheus.GaugeVec
+	refillPayloadCounter *prometheus.GaugeVec
+	refillPercentCounter *prometheus.GaugeVec
+
 	gc         *gcMetrics
 	writeCache *writeCacheMetrics
 }
@@ -55,10 +64,14 @@ func newEngineMetrics() *engineMetrics {
 		objectCounter: newEngineGaugeVector("objects_total",
 			"Objects counters per shards. DEPRECATED: Will be deleted in next releasese, use frostfs_node_engine_container_objects_total metric.",
 			[]string{shardIDLabel, typeLabel}),
-		gc:             newGCMetrics(),
-		writeCache:     newWriteCacheMetrics(),
-		mode:           newShardIDMode(engineSubsystem, "mode_info", "Shard mode"),
-		contObjCounter: newEngineGaugeVector("container_objects_total", "Count of objects for each container", []string{shardIDLabel, containerIDLabelKey, typeLabel}),
+		gc:                   newGCMetrics(),
+		writeCache:           newWriteCacheMetrics(),
+		mode:                 newShardIDMode(engineSubsystem, "mode_info", "Shard mode"),
+		contObjCounter:       newEngineGaugeVector("container_objects_total", "Count of objects for each container", []string{shardIDLabel, containerIDLabelKey, typeLabel}),
+		refillStatus:         newShardIDPathMode(engineSubsystem, "resync_metabase_status", "Resync from blobstore to metabase status"),
+		refillObjCounter:     newEngineGaugeVector("resync_metabase_objects_total", "Count of objects resynced from blobstore to metabase", []string{shardIDLabel, pathLabel, successLabel}),
+		refillPayloadCounter: newEngineGaugeVector("resync_metabase_objects_size_bytes", "Size of objects resynced from blobstore to metabase", []string{shardIDLabel, pathLabel, successLabel}),
+		refillPercentCounter: newEngineGaugeVector("resync_metabase_complete_percent", "Percent of resynced from blobstore to metabase completeness", []string{shardIDLabel, pathLabel}),
 	}
 }
 
@@ -106,7 +119,11 @@ func (m *engineMetrics) DeleteShardMetrics(shardID string) {
 	m.payloadSize.Delete(prometheus.Labels{shardIDLabel: shardID})
 	m.objectCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
 	m.contObjCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
+	m.refillObjCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
+	m.refillPayloadCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
+	m.refillPercentCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
 	m.mode.Delete(shardID)
+	m.refillStatus.DeleteByShardID(shardID)
 }
 
 func (m *engineMetrics) AddToObjectCounter(shardID, objectType string, delta int) {
@@ -168,3 +185,31 @@ func (m *engineMetrics) WriteCache() WriteCacheMetrics {
 func (m *engineMetrics) GC() GCMetrics {
 	return m.gc
 }
+
+func (m *engineMetrics) IncRefillObjectsCount(shardID, path string, size int, success bool) {
+	m.refillObjCounter.With(
+		prometheus.Labels{
+			shardIDLabel: shardID,
+			pathLabel:    path,
+			successLabel: strconv.FormatBool(success),
+		},
+	).Inc()
+	m.refillPayloadCounter.With(
+		prometheus.Labels{
+			shardIDLabel: shardID,
+			pathLabel:    path,
+			successLabel: strconv.FormatBool(success),
+		},
+	).Add(float64(size))
+}
+
+func (m *engineMetrics) SetRefillPercent(shardID, path string, percent uint32) {
+	m.refillPercentCounter.With(prometheus.Labels{
+		shardIDLabel: shardID,
+		pathLabel:    path,
+	}).Set(float64(percent))
+}
+
+func (m *engineMetrics) SetRefillStatus(shardID, path, status string) {
+	m.refillStatus.SetMode(shardID, path, status)
+}

pkg/metrics/mode.go

@@ -74,6 +74,12 @@ func (m *shardIDPathModeValue) Delete(shardID, path string) {
 	})
 }
 
+func (m *shardIDPathModeValue) DeleteByShardID(shardID string) {
+	m.modeValue.DeletePartialMatch(prometheus.Labels{
+		shardIDLabel: shardID,
+	})
+}
+
 func modeFromBool(readOnly bool) string {
 	modeValue := readWriteMode
 	if readOnly {