[#763] metrics: Add container_objects_total metric

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

internal/logs/logs.go

@@ -516,4 +516,5 @@ const (
 	RuntimeSoftMemoryDefinedWithGOMEMLIMIT                                  = "soft runtime memory defined with GOMEMLIMIT environment variable, config value skipped"
 	FailedToCountWritecacheItems                                            = "failed to count writecache items"
 	AttemtToCloseAlreadyClosedBlobovnicza                                   = "attempt to close an already closed blobovnicza"
+	FailedToGetContainerCounters                                            = "failed to get container counters values"
 )

pkg/local_object_storage/engine/metrics.go

@@ -21,6 +21,10 @@ type MetricRegister interface {
 	ClearErrorCounter(shardID string)
 	DeleteShardMetrics(shardID string)
 
+	SetContainerObjectCounter(shardID, contID, objectType string, v uint64)
+	IncContainerObjectCounter(shardID, contID, objectType string)
+	SubContainerObjectCounter(shardID, contID, objectType string, v uint64)
+
 	WriteCache() metrics.WriteCacheMetrics
 	GC() metrics.GCMetrics
 }

pkg/local_object_storage/engine/shards.go

@@ -74,6 +74,18 @@ func (m *metricsWithID) DeleteShardMetrics() {
 	m.mw.DeleteShardMetrics(m.id)
 }
 
+func (m *metricsWithID) SetContainerObjectsCount(cnrID string, objectType string, value uint64) {
+	m.mw.SetContainerObjectCounter(m.id, cnrID, objectType, value)
+}
+
+func (m *metricsWithID) IncContainerObjectsCount(cnrID string, objectType string) {
+	m.mw.IncContainerObjectCounter(m.id, cnrID, objectType)
+}
+
+func (m *metricsWithID) SubContainerObjectsCount(cnrID string, objectType string, value uint64) {
+	m.mw.SubContainerObjectCounter(m.id, cnrID, objectType, value)
+}
+
 // AddShard adds a new shard to the storage engine.
 //
 // Returns any error encountered that did not allow adding a shard.

pkg/local_object_storage/metabase/delete.go

@@ -31,6 +31,7 @@ type DeleteRes struct {
 	availableRemoved uint64
 	sizes            []uint64
 	availableSizes   []uint64
+	removedByCnrID   map[cid.ID]ObjectCounters
 }
 
 // AvailableObjectsRemoved returns the number of removed available
@@ -39,6 +40,11 @@ func (d DeleteRes) AvailableObjectsRemoved() uint64 {
 	return d.availableRemoved
 }
 
+// RemovedByCnrID returns the number of removed objects by container ID.
+func (d DeleteRes) RemovedByCnrID() map[cid.ID]ObjectCounters {
+	return d.removedByCnrID
+}
+
 // RawObjectsRemoved returns the number of removed raw objects.
 func (d DeleteRes) RawObjectsRemoved() uint64 {
 	return d.rawRemoved
@@ -96,15 +102,11 @@ func (db *DB) Delete(ctx context.Context, prm DeletePrm) (DeleteRes, error) {
 		return DeleteRes{}, ErrReadOnlyMode
 	}
 
-	var rawRemoved uint64
-	var availableRemoved uint64
 	var err error
-	sizes := make([]uint64, len(prm.addrs))
+	var res DeleteRes
-	availableSizes := make([]uint64, len(prm.addrs))
 
 	err = db.boltDB.Update(func(tx *bbolt.Tx) error {
-		// We need to clear slice because tx can try to execute multiple times.
+		res, err = db.deleteGroup(tx, prm.addrs)
-		rawRemoved, availableRemoved, err = db.deleteGroup(tx, prm.addrs, sizes, availableSizes)
 		return err
 	})
 	if err == nil {
@@ -115,91 +117,83 @@ func (db *DB) Delete(ctx context.Context, prm DeletePrm) (DeleteRes, error) {
 				storagelog.OpField("metabase DELETE"))
 		}
 	}
-	return DeleteRes{
+	return res, metaerr.Wrap(err)
-		rawRemoved:       rawRemoved,
-		availableRemoved: availableRemoved,
-		sizes:            sizes,
-		availableSizes:   availableSizes,
-	}, metaerr.Wrap(err)
 }
 
 // deleteGroup deletes object from the metabase. Handles removal of the
 // references of the split objects.
-// The first return value is a physical objects removed number: physical
+func (db *DB) deleteGroup(tx *bbolt.Tx, addrs []oid.Address) (DeleteRes, error) {
-// objects that were stored. The second return value is a logical objects
+	res := DeleteRes{
-// removed number: objects that were available (without Tombstones, GCMarks
+		sizes:          make([]uint64, len(addrs)),
-// non-expired, etc.)
+		availableSizes: make([]uint64, len(addrs)),
-func (db *DB) deleteGroup(tx *bbolt.Tx, addrs []oid.Address, sizes []uint64, availableSizes []uint64) (uint64, uint64, error) {
+		removedByCnrID: make(map[cid.ID]ObjectCounters),
+	}
 	refCounter := make(referenceCounter, len(addrs))
 	currEpoch := db.epochState.CurrentEpoch()
 
-	cnrIDDelta := make(map[cid.ID]ObjectCounters)
-	var rawDeletedTotal uint64
-	var availableDeletedTotal uint64
-
 	for i := range addrs {
 		removed, available, size, err := db.delete(tx, addrs[i], refCounter, currEpoch)
 		if err != nil {
-			return 0, 0, err // maybe log and continue?
+			return DeleteRes{}, err // maybe log and continue?
 		}
 
 		if removed {
-			if v, ok := cnrIDDelta[addrs[i].Container()]; ok {
+			if v, ok := res.removedByCnrID[addrs[i].Container()]; ok {
 				v.phy++
-				cnrIDDelta[addrs[i].Container()] = v
+				res.removedByCnrID[addrs[i].Container()] = v
 			} else {
-				cnrIDDelta[addrs[i].Container()] = ObjectCounters{
+				res.removedByCnrID[addrs[i].Container()] = ObjectCounters{
 					phy: 1,
 				}
 			}
 
-			rawDeletedTotal++
+			res.rawRemoved++
-			sizes[i] = size
+			res.sizes[i] = size
 		}
 
 		if available {
-			if v, ok := cnrIDDelta[addrs[i].Container()]; ok {
+			if v, ok := res.removedByCnrID[addrs[i].Container()]; ok {
 				v.logic++
-				cnrIDDelta[addrs[i].Container()] = v
+				res.removedByCnrID[addrs[i].Container()] = v
 			} else {
-				cnrIDDelta[addrs[i].Container()] = ObjectCounters{
+				res.removedByCnrID[addrs[i].Container()] = ObjectCounters{
 					logic: 1,
 				}
 			}
 
-			availableDeletedTotal++
+			res.availableRemoved++
-			availableSizes[i] = size
+			res.availableSizes[i] = size
 		}
 	}
 
-	if rawDeletedTotal > 0 {
+	if res.rawRemoved > 0 {
-		err := db.updateShardObjectCounter(tx, phy, rawDeletedTotal, false)
+		err := db.updateShardObjectCounter(tx, phy, res.rawRemoved, false)
 		if err != nil {
-			return 0, 0, fmt.Errorf("could not decrease phy object counter: %w", err)
+			return DeleteRes{}, fmt.Errorf("could not decrease phy object counter: %w", err)
 		}
 	}
 
-	if availableDeletedTotal > 0 {
+	if res.availableRemoved > 0 {
-		err := db.updateShardObjectCounter(tx, logical, availableDeletedTotal, false)
+		err := db.updateShardObjectCounter(tx, logical, res.availableRemoved, false)
 		if err != nil {
-			return 0, 0, fmt.Errorf("could not decrease logical object counter: %w", err)
+			return DeleteRes{}, fmt.Errorf("could not decrease logical object counter: %w", err)
 		}
 	}
 
-	if err := db.updateContainerCounter(tx, cnrIDDelta, false); err != nil {
+	if err := db.updateContainerCounter(tx, res.removedByCnrID, false); err != nil {
-		return 0, 0, fmt.Errorf("could not decrease container object counter: %w", err)
+		return DeleteRes{}, fmt.Errorf("could not decrease container object counter: %w", err)
 	}
 
 	for _, refNum := range refCounter {
 		if refNum.cur == refNum.all {
 			err := db.deleteObject(tx, refNum.obj, true)
 			if err != nil {
-				return rawDeletedTotal, availableDeletedTotal, err // maybe log and continue?
+				return DeleteRes{}, err // maybe log and continue?
 			}
 		}
 	}
 
-	return rawDeletedTotal, availableDeletedTotal, nil
+	return res, nil
 }
 
 // delete removes object indexes from the metabase. Counts the references

pkg/local_object_storage/metabase/inhume.go

@@ -37,14 +37,21 @@ type DeletionInfo struct {
 // InhumeRes encapsulates results of Inhume operation.
 type InhumeRes struct {
 	deletedLockObj   []oid.Address
-	availableImhumed uint64
+	availableInhumed uint64
+	inhumedByCnrID   map[cid.ID]ObjectCounters
 	deletionDetails  []DeletionInfo
 }
 
 // AvailableInhumed return number of available object
 // that have been inhumed.
 func (i InhumeRes) AvailableInhumed() uint64 {
-	return i.availableImhumed
+	return i.availableInhumed
+}
+
+// InhumedByCnrID return number of object
+// that have been inhumed by container ID.
+func (i InhumeRes) InhumedByCnrID() map[cid.ID]ObjectCounters {
+	return i.inhumedByCnrID
 }
 
 // DeletedLockObjects returns deleted object of LOCK
@@ -73,7 +80,15 @@ func (i *InhumeRes) storeDeletionInfo(containerID cid.ID, deletedSize uint64) {
 		Size: deletedSize,
 		CID:  containerID,
 	})
-	i.availableImhumed++
+	i.availableInhumed++
+	if v, ok := i.inhumedByCnrID[containerID]; ok {
+		v.logic++
+		i.inhumedByCnrID[containerID] = v
+	} else {
+		i.inhumedByCnrID[containerID] = ObjectCounters{
+			logic: 1,
+		}
+	}
 }
 
 // SetAddresses sets a list of object addresses that should be inhumed.
@@ -123,7 +138,7 @@ var ErrLockObjectRemoval = logicerr.New("lock object removal")
 //
 // NOTE: Marks any object with GC mark (despite any prohibitions on operations
 // with that object) if WithForceGCMark option has been provided.
-func (db *DB) Inhume(ctx context.Context, prm InhumePrm) (res InhumeRes, err error) {
+func (db *DB) Inhume(ctx context.Context, prm InhumePrm) (InhumeRes, error) {
 	var (
 		startedAt = time.Now()
 		success   = false
@@ -143,8 +158,11 @@ func (db *DB) Inhume(ctx context.Context, prm InhumePrm) (res InhumeRes, err err
 		return InhumeRes{}, ErrReadOnlyMode
 	}
 
+	res := InhumeRes{
+		inhumedByCnrID: make(map[cid.ID]ObjectCounters),
+	}
 	currEpoch := db.epochState.CurrentEpoch()
-	err = db.boltDB.Update(func(tx *bbolt.Tx) error {
+	err := db.boltDB.Update(func(tx *bbolt.Tx) error {
 		return db.inhumeTx(tx, currEpoch, prm, &res)
 	})
 	success = err == nil

pkg/local_object_storage/shard/delete.go

@@ -118,6 +118,7 @@ func (s *Shard) deleteFromMetabase(ctx context.Context, addr oid.Address) error
 	}
 	s.decObjectCounterBy(physical, res.RawObjectsRemoved())
 	s.decObjectCounterBy(logical, res.AvailableObjectsRemoved())
+	s.decContainerObjectCounter(res.RemovedByCnrID())
 	removedPayload := res.RemovedPhysicalObjectSizes()[0]
 	logicalRemovedPayload := res.RemovedLogicalObjectSizes()[0]
 	if logicalRemovedPayload > 0 {

pkg/local_object_storage/shard/gc.go

@@ -416,6 +416,7 @@ func (s *Shard) handleExpiredObjects(ctx context.Context, expired []oid.Address)
 
 	s.gc.metrics.AddInhumedObjectCount(res.AvailableInhumed(), objectTypeRegular)
 	s.decObjectCounterBy(logical, res.AvailableInhumed())
+	s.decContainerObjectCounter(res.InhumedByCnrID())
 
 	i := 0
 	for i < res.GetDeletionInfoLength() {
@@ -629,6 +630,7 @@ func (s *Shard) HandleExpiredTombstones(ctx context.Context, tss []meta.Tombston
 
 	s.gc.metrics.AddInhumedObjectCount(res.AvailableInhumed(), objectTypeTombstone)
 	s.decObjectCounterBy(logical, res.AvailableInhumed())
+	s.decContainerObjectCounter(res.InhumedByCnrID())
 
 	i := 0
 	for i < res.GetDeletionInfoLength() {
@@ -675,6 +677,7 @@ func (s *Shard) HandleExpiredLocks(ctx context.Context, epoch uint64, lockers []
 
 	s.gc.metrics.AddInhumedObjectCount(res.AvailableInhumed(), objectTypeLock)
 	s.decObjectCounterBy(logical, res.AvailableInhumed())
+	s.decContainerObjectCounter(res.InhumedByCnrID())
 
 	i := 0
 	for i < res.GetDeletionInfoLength() {

pkg/local_object_storage/shard/inhume.go

@@ -122,6 +122,7 @@ func (s *Shard) Inhume(ctx context.Context, prm InhumePrm) (InhumeRes, error) {
 	s.m.RUnlock()
 
 	s.decObjectCounterBy(logical, res.AvailableInhumed())
+	s.decContainerObjectCounter(res.InhumedByCnrID())
 
 	i := 0
 	for i < res.GetDeletionInfoLength() {

pkg/local_object_storage/shard/metrics_test.go

@@ -14,6 +14,7 @@ import (
 	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/pilorama"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/stretchr/testify/require"
@@ -23,6 +24,7 @@ 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
@@ -126,6 +128,39 @@ func (m *metricsStore) DeleteShardMetrics() {
 	m.errCounter = 0
 }
 
+func (m *metricsStore) SetContainerObjectsCount(cnrID string, objectType string, value uint64) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	m.cnrCount[cnrID+objectType] = value
+}
+
+func (m *metricsStore) IncContainerObjectsCount(cnrID string, objectType string) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	m.cnrCount[cnrID+objectType]++
+}
+
+func (m *metricsStore) SubContainerObjectsCount(cnrID string, objectType string, value uint64) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	existed := m.cnrCount[cnrID+objectType]
+	if existed < value {
+		panic("existed value smaller than value to sustract")
+	}
+	if existed == value {
+		delete(m.cnrCount, cnrID+objectType)
+	} else {
+		m.cnrCount[cnrID+objectType] -= value
+	}
+}
+
+func (m *metricsStore) getContainerCount(cnrID, objectType string) (uint64, bool) {
+	m.mtx.Lock()
+	defer m.mtx.Unlock()
+	v, ok := m.cnrCount[cnrID+objectType]
+	return v, ok
+}
+
 func TestCounters(t *testing.T) {
 	t.Parallel()
 
@@ -143,21 +178,37 @@ func TestCounters(t *testing.T) {
 		oo[i] = testutil.GenerateObject()
 	}
 
+	cc := meta.ContainerCounters{Logical: make(map[cid.ID]uint64), Physical: make(map[cid.ID]uint64)}
+
 	t.Run("defaults", func(t *testing.T) {
 		require.Zero(t, mm.getObjectCounter(physical))
 		require.Zero(t, mm.getObjectCounter(logical))
 		require.Empty(t, mm.containerSizes())
 		require.Zero(t, mm.payloadSize())
+
+		for _, obj := range oo {
+			contID, _ := obj.ContainerID()
+			v, ok := mm.getContainerCount(contID.EncodeToString(), physical)
+			require.Zero(t, v)
+			require.False(t, ok)
+			v, ok = mm.getContainerCount(contID.EncodeToString(), logical)
+			require.Zero(t, v)
+			require.False(t, ok)
+		}
 	})
 
 	var totalPayload int64
 
 	expectedLogicalSizes := make(map[string]int64)
+	expectedLogCC := make(map[cid.ID]uint64)
+	expectedPhyCC := make(map[cid.ID]uint64)
 	for i := range oo {
 		cnr, _ := oo[i].ContainerID()
 		oSize := int64(oo[i].PayloadSize())
 		expectedLogicalSizes[cnr.EncodeToString()] += oSize
 		totalPayload += oSize
+		expectedLogCC[cnr]++
+		expectedPhyCC[cnr]++
 	}
 
 	var prm PutPrm
@@ -174,6 +225,11 @@ func TestCounters(t *testing.T) {
 	require.Equal(t, expectedLogicalSizes, mm.containerSizes())
 	require.Equal(t, totalPayload, mm.payloadSize())
 
+	cc, err := sh.metaBase.ContainerCounters(context.Background())
+	require.NoError(t, err)
+	require.Equal(t, expectedLogCC, cc.Logical)
+	require.Equal(t, expectedPhyCC, cc.Physical)
+
 	t.Run("inhume_GC", func(t *testing.T) {
 		var prm InhumePrm
 		inhumedNumber := objNumber / 4
@@ -187,6 +243,11 @@ func TestCounters(t *testing.T) {
 			cid, ok := oo[i].ContainerID()
 			require.True(t, ok)
 			expectedLogicalSizes[cid.EncodeToString()] -= int64(oo[i].PayloadSize())
+
+			expectedLogCC[cid]--
+			if expectedLogCC[cid] == 0 {
+				delete(expectedLogCC, cid)
+			}
 		}
 
 		require.Equal(t, uint64(objNumber), mm.getObjectCounter(physical))
@@ -194,6 +255,11 @@ func TestCounters(t *testing.T) {
 		require.Equal(t, expectedLogicalSizes, mm.containerSizes())
 		require.Equal(t, totalPayload, mm.payloadSize())
 
+		cc, err := sh.metaBase.ContainerCounters(context.Background())
+		require.NoError(t, err)
+		require.Equal(t, expectedLogCC, cc.Logical)
+		require.Equal(t, expectedPhyCC, cc.Physical)
+
 		oo = oo[inhumedNumber:]
 	})
 
@@ -214,6 +280,11 @@ func TestCounters(t *testing.T) {
 			cid, ok := oo[i].ContainerID()
 			require.True(t, ok)
 			expectedLogicalSizes[cid.EncodeToString()] -= int64(oo[i].PayloadSize())
+
+			expectedLogCC[cid]--
+			if expectedLogCC[cid] == 0 {
+				delete(expectedLogCC, cid)
+			}
 		}
 
 		require.Equal(t, phy, mm.getObjectCounter(physical))
@@ -221,6 +292,11 @@ func TestCounters(t *testing.T) {
 		require.Equal(t, expectedLogicalSizes, mm.containerSizes())
 		require.Equal(t, totalPayload, mm.payloadSize())
 
+		cc, err = sh.metaBase.ContainerCounters(context.Background())
+		require.NoError(t, err)
+		require.Equal(t, expectedLogCC, cc.Logical)
+		require.Equal(t, expectedPhyCC, cc.Physical)
+
 		oo = oo[inhumedNumber:]
 	})
 
@@ -245,9 +321,24 @@ func TestCounters(t *testing.T) {
 
 			cnr, _ := oo[i].ContainerID()
 			expectedLogicalSizes[cnr.EncodeToString()] -= int64(removedPayload)
+
+			expectedLogCC[cnr]--
+			if expectedLogCC[cnr] == 0 {
+				delete(expectedLogCC, cnr)
+			}
+
+			expectedPhyCC[cnr]--
+			if expectedPhyCC[cnr] == 0 {
+				delete(expectedPhyCC, cnr)
+			}
 		}
 		require.Equal(t, expectedLogicalSizes, mm.containerSizes())
 		require.Equal(t, totalPayload-int64(totalRemovedpayload), mm.payloadSize())
+
+		cc, err = sh.metaBase.ContainerCounters(context.Background())
+		require.NoError(t, err)
+		require.Equal(t, expectedLogCC, cc.Logical)
+		require.Equal(t, expectedPhyCC, cc.Physical)
 	})
 }
 
@@ -269,6 +360,7 @@ func shardWithMetrics(t *testing.T, path string) (*Shard, *metricsStore) {
 			"logic": 0,
 		},
 		cnrSize:  make(map[string]int64),
+		cnrCount: make(map[string]uint64),
 	}
 
 	sh := New(

pkg/local_object_storage/shard/put.go

@@ -90,7 +90,7 @@ func (s *Shard) Put(ctx context.Context, prm PutPrm) (PutRes, error) {
 			return PutRes{}, fmt.Errorf("could not put object to metabase: %w", err)
 		}
 
-		s.incObjectCounter()
+		s.incObjectCounter(putPrm.Address.Container())
 		s.addToPayloadSize(int64(prm.obj.PayloadSize()))
 		s.addToContainerSize(putPrm.Address.Container().EncodeToString(), int64(prm.obj.PayloadSize()))
 	}

pkg/local_object_storage/shard/shard.go

@@ -18,6 +18,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/writecache/writecachebbolt"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.uber.org/zap"
 )
@@ -85,6 +86,12 @@ type MetricsWriter interface {
 	ClearErrorCounter()
 	// DeleteShardMetrics deletes shard metrics from registry.
 	DeleteShardMetrics()
+	// SetContainerObjectsCount sets container object count.
+	SetContainerObjectsCount(cnrID string, objectType string, value uint64)
+	// IncContainerObjectsCount increments container object count.
+	IncContainerObjectsCount(cnrID string, objectType string)
+	// SubContainerObjectsCount subtracts container object count.
+	SubContainerObjectsCount(cnrID string, objectType string, value uint64)
 }
 
 type cfg struct {
@@ -425,15 +432,29 @@ func (s *Shard) updateMetrics(ctx context.Context) {
 		}
 
 		s.metricsWriter.AddToPayloadSize(int64(totalPayload))
+
+		contCount, err := s.metaBase.ContainerCounters(ctx)
+		if err != nil {
+			s.log.Warn(logs.FailedToGetContainerCounters, zap.Error(err))
+			return
+		}
+		for contID, count := range contCount.Physical {
+			s.metricsWriter.SetContainerObjectsCount(contID.EncodeToString(), physical, count)
+		}
+		for contID, count := range contCount.Logical {
+			s.metricsWriter.SetContainerObjectsCount(contID.EncodeToString(), logical, count)
+		}
 	}
 }
 
 // incObjectCounter increment both physical and logical object
 // counters.
-func (s *Shard) incObjectCounter() {
+func (s *Shard) incObjectCounter(cnrID cid.ID) {
 	if s.cfg.metricsWriter != nil {
 		s.cfg.metricsWriter.IncObjectCounter(physical)
 		s.cfg.metricsWriter.IncObjectCounter(logical)
+		s.cfg.metricsWriter.IncContainerObjectsCount(cnrID.EncodeToString(), physical)
+		s.cfg.metricsWriter.IncContainerObjectsCount(cnrID.EncodeToString(), logical)
 	}
 }
 
@@ -443,6 +464,17 @@ func (s *Shard) decObjectCounterBy(typ string, v uint64) {
 	}
 }
 
+func (s *Shard) decContainerObjectCounter(byCnr map[cid.ID]meta.ObjectCounters) {
+	if s.cfg.metricsWriter == nil {
+		return
+	}
+
+	for cnrID, count := range byCnr {
+		s.cfg.metricsWriter.SubContainerObjectsCount(cnrID.EncodeToString(), physical, count.Phy())
+		s.cfg.metricsWriter.SubContainerObjectsCount(cnrID.EncodeToString(), logical, count.Logic())
+	}
+}
+
 func (s *Shard) addToContainerSize(cnr string, size int64) {
 	if s.cfg.metricsWriter != nil {
 		s.cfg.metricsWriter.AddToContainerSize(cnr, size)

pkg/metrics/engine.go

@@ -18,6 +18,9 @@ type EngineMetrics interface {
 	SetObjectCounter(shardID, objectType string, v uint64)
 	AddToPayloadCounter(shardID string, size int64)
 	SetMode(shardID string, mode mode.Mode)
+	SetContainerObjectCounter(shardID, contID, objectType string, v uint64)
+	IncContainerObjectCounter(shardID, contID, objectType string)
+	SubContainerObjectCounter(shardID, contID, objectType string, v uint64)
 
 	WriteCache() WriteCacheMetrics
 	GC() GCMetrics
@@ -30,6 +33,7 @@ type engineMetrics struct {
 	payloadSize    *prometheus.GaugeVec
 	errorCounter   *prometheus.GaugeVec
 	mode           *shardIDModeValue
+	contObjCounter *prometheus.GaugeVec
 
 	gc         *gcMetrics
 	writeCache *writeCacheMetrics
@@ -46,10 +50,13 @@ func newEngineMetrics() *engineMetrics {
 			Name:      "request_duration_seconds",
 			Help:      "Duration of Engine requests",
 		}, []string{methodLabel}),
-		objectCounter: newEngineGaugeVector("objects_total", "Objects counters per shards", []string{shardIDLabel, typeLabel}),
+		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}),
 	}
 }
 
@@ -88,6 +95,7 @@ func (m *engineMetrics) DeleteShardMetrics(shardID string) {
 	m.errorCounter.Delete(prometheus.Labels{shardIDLabel: shardID})
 	m.payloadSize.Delete(prometheus.Labels{shardIDLabel: shardID})
 	m.objectCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
+	m.contObjCounter.DeletePartialMatch(prometheus.Labels{shardIDLabel: shardID})
 	m.mode.Delete(shardID)
 }
 
@@ -109,6 +117,36 @@ func (m *engineMetrics) SetObjectCounter(shardID, objectType string, v uint64) {
 	).Set(float64(v))
 }
 
+func (m *engineMetrics) SetContainerObjectCounter(shardID, contID, objectType string, v uint64) {
+	m.contObjCounter.With(
+		prometheus.Labels{
+			shardIDLabel:        shardID,
+			containerIDLabelKey: contID,
+			typeLabel:           objectType,
+		},
+	).Set(float64(v))
+}
+
+func (m *engineMetrics) IncContainerObjectCounter(shardID, contID, objectType string) {
+	m.contObjCounter.With(
+		prometheus.Labels{
+			shardIDLabel:        shardID,
+			containerIDLabelKey: contID,
+			typeLabel:           objectType,
+		},
+	).Inc()
+}
+
+func (m *engineMetrics) SubContainerObjectCounter(shardID, contID, objectType string, v uint64) {
+	m.contObjCounter.With(
+		prometheus.Labels{
+			shardIDLabel:        shardID,
+			containerIDLabelKey: contID,
+			typeLabel:           objectType,
+		},
+	).Sub(float64(v))
+}
+
 func (m *engineMetrics) SetMode(shardID string, mode mode.Mode) {
 	m.mode.SetMode(shardID, mode.String())
 }