[#1129] policer: Restore EC object

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

cmd/frostfs-node/object.go

@@ -29,7 +29,6 @@ import (
 	deletesvcV2 "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/delete/v2"
 	getsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/get"
 	getsvcV2 "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/get/v2"
-	headsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/head"
 	putsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/put"
 	putsvcV2 "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/put/v2"
 	searchsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/search"
@@ -231,7 +230,7 @@ func addPolicer(c *cfg, keyStorage *util.KeyStorage, clientConstructor *cache.Cl
 		return err
 	}
 
-	remoteHeader := headsvc.NewRemoteHeader(keyStorage, clientConstructor)
+	remoteReader := objectService.NewRemoteReader(keyStorage, clientConstructor)
 
 	pol := policer.New(
 		policer.WithLogger(c.log),
@@ -243,8 +242,8 @@ func addPolicer(c *cfg, keyStorage *util.KeyStorage, clientConstructor *cache.Cl
 		),
 		policer.WithRemoteObjectHeaderFunc(
 			func(ctx context.Context, ni netmapSDK.NodeInfo, a oid.Address, raw bool) (*objectSDK.Object, error) {
-				prm := new(headsvc.RemoteHeadPrm).WithNodeInfo(ni).WithObjectAddress(a).WithRaw(raw)
+				prm := new(objectService.RemoteRequestPrm).WithNodeInfo(ni).WithObjectAddress(a).WithRaw(raw)
-				return remoteHeader.Head(ctx, prm)
+				return remoteReader.Head(ctx, prm)
 			},
 		),
 		policer.WithLocalObjectHeaderFunc(func(ctx context.Context, a oid.Address) (*objectSDK.Object, error) {
@@ -256,6 +255,19 @@ func addPolicer(c *cfg, keyStorage *util.KeyStorage, clientConstructor *cache.Cl
 			}
 			return res.Header(), nil
 		}),
+		policer.WithRemoteObjectGetFunc(func(ctx context.Context, ni netmapSDK.NodeInfo, a oid.Address) (*objectSDK.Object, error) {
+			prm := new(objectService.RemoteRequestPrm).WithNodeInfo(ni).WithObjectAddress(a)
+			return remoteReader.Get(ctx, prm)
+		}),
+		policer.WithLocalObjectGetFunc(func(ctx context.Context, a oid.Address) (*objectSDK.Object, error) {
+			var prm engine.GetPrm
+			prm.WithAddress(a)
+			res, err := c.cfgObject.cfgLocalStorage.localStorage.Get(ctx, prm)
+			if err != nil {
+				return nil, err
+			}
+			return res.Object(), nil
+		}),
 		policer.WithNetmapKeys(c),
 		policer.WithHeadTimeout(
 			policerconfig.HeadTimeout(c.appCfg),
@@ -274,6 +286,7 @@ func addPolicer(c *cfg, keyStorage *util.KeyStorage, clientConstructor *cache.Cl
 		}),
 		policer.WithPool(c.cfgObject.pool.replication),
 		policer.WithMetrics(c.metricsCollector.PolicerMetrics()),
+		policer.WithKeyStorage(keyStorage),
 	)
 
 	c.workers = append(c.workers, worker{

internal/logs/logs.go

@@ -536,4 +536,9 @@ const (
 	PolicerDifferentObjectIDForTheSameECChunk                            = "different object IDs for the same EC chunk"
 	ReplicatorCouldNotGetObjectFromRemoteStorage                         = "could not get object from remote storage"
 	ReplicatorCouldNotPutObjectToLocalStorage                            = "could not put object to local storage"
+	PolicerCouldNotGetObjectFromNodeMoving                               = "could not get EC object from the node, moving current chunk to the node"
+	PolicerCouldNotRestoreObjectNotEnoughChunks                          = "could not restore EC object: not enough chunks"
+	PolicerFailedToRestoreObject                                         = "failed to restore EC object"
+	PolicerCouldNotGetChunk                                              = "could not get EC chunk"
+	PolicerCouldNotGetChunks                                             = "could not get EC chunks"
 )

pkg/services/object/remote_reader.go

@@ -1,4 +1,4 @@
-package headsvc
+package object
 
 import (
 	"context"
@@ -18,16 +18,16 @@ type ClientConstructor interface {
 	Get(clientcore.NodeInfo) (clientcore.MultiAddressClient, error)
 }
 
-// RemoteHeader represents utility for getting
+// RemoteReader represents utility for getting
-// the object header from a remote host.
+// the object from a remote host.
-type RemoteHeader struct {
+type RemoteReader struct {
 	keyStorage *util.KeyStorage
 
 	clientCache ClientConstructor
 }
 
-// RemoteHeadPrm groups remote header operation parameters.
+// RemoteRequestPrm groups remote operation parameters.
-type RemoteHeadPrm struct {
+type RemoteRequestPrm struct {
 	addr oid.Address
 	raw  bool
 	node netmap.NodeInfo
@@ -37,16 +37,16 @@ const remoteOpTTL = 1
 
 var ErrNotFound = errors.New("object header not found")
 
-// NewRemoteHeader creates, initializes and returns new RemoteHeader instance.
+// NewRemoteReader creates, initializes and returns new RemoteHeader instance.
-func NewRemoteHeader(keyStorage *util.KeyStorage, cache ClientConstructor) *RemoteHeader {
+func NewRemoteReader(keyStorage *util.KeyStorage, cache ClientConstructor) *RemoteReader {
-	return &RemoteHeader{
+	return &RemoteReader{
 		keyStorage:  keyStorage,
 		clientCache: cache,
 	}
 }
 
 // WithNodeInfo sets information about the remote node.
-func (p *RemoteHeadPrm) WithNodeInfo(v netmap.NodeInfo) *RemoteHeadPrm {
+func (p *RemoteRequestPrm) WithNodeInfo(v netmap.NodeInfo) *RemoteRequestPrm {
 	if p != nil {
 		p.node = v
 	}
@@ -55,7 +55,7 @@ func (p *RemoteHeadPrm) WithNodeInfo(v netmap.NodeInfo) *RemoteHeadPrm {
 }
 
 // WithObjectAddress sets object address.
-func (p *RemoteHeadPrm) WithObjectAddress(v oid.Address) *RemoteHeadPrm {
+func (p *RemoteRequestPrm) WithObjectAddress(v oid.Address) *RemoteRequestPrm {
 	if p != nil {
 		p.addr = v
 	}
@@ -63,7 +63,7 @@ func (p *RemoteHeadPrm) WithObjectAddress(v oid.Address) *RemoteHeadPrm {
 	return p
 }
 
-func (p *RemoteHeadPrm) WithRaw(v bool) *RemoteHeadPrm {
+func (p *RemoteRequestPrm) WithRaw(v bool) *RemoteRequestPrm {
 	if p != nil {
 		p.raw = v
 	}
@@ -71,7 +71,7 @@ func (p *RemoteHeadPrm) WithRaw(v bool) *RemoteHeadPrm {
 }
 
 // Head requests object header from the remote node.
-func (h *RemoteHeader) Head(ctx context.Context, prm *RemoteHeadPrm) (*objectSDK.Object, error) {
+func (h *RemoteReader) Head(ctx context.Context, prm *RemoteRequestPrm) (*objectSDK.Object, error) {
 	key, err := h.keyStorage.GetKey(nil)
 	if err != nil {
 		return nil, fmt.Errorf("(%T) could not receive private key: %w", h, err)
@@ -106,3 +106,39 @@ func (h *RemoteHeader) Head(ctx context.Context, prm *RemoteHeadPrm) (*objectSDK
 
 	return res.Header(), nil
 }
+
+func (h *RemoteReader) Get(ctx context.Context, prm *RemoteRequestPrm) (*objectSDK.Object, error) {
+	key, err := h.keyStorage.GetKey(nil)
+	if err != nil {
+		return nil, fmt.Errorf("(%T) could not receive private key: %w", h, err)
+	}
+
+	var info clientcore.NodeInfo
+
+	err = clientcore.NodeInfoFromRawNetmapElement(&info, netmapCore.Node(prm.node))
+	if err != nil {
+		return nil, fmt.Errorf("parse client node info: %w", err)
+	}
+
+	c, err := h.clientCache.Get(info)
+	if err != nil {
+		return nil, fmt.Errorf("(%T) could not create SDK client %s: %w", h, info.AddressGroup(), err)
+	}
+
+	var getPrm internalclient.GetObjectPrm
+
+	getPrm.SetClient(c)
+	getPrm.SetPrivateKey(key)
+	getPrm.SetAddress(prm.addr)
+	getPrm.SetTTL(remoteOpTTL)
+	if prm.raw {
+		getPrm.SetRawFlag()
+	}
+
+	res, err := internalclient.GetObject(ctx, getPrm)
+	if err != nil {
+		return nil, fmt.Errorf("(%T) could not head object in %s: %w", h, info.AddressGroup(), err)
+	}
+
+	return res.Object(), nil
+}

pkg/services/policer/ec.go

@@ -2,6 +2,7 @@ package policer
 
 import (
 	"context"
+	"encoding/hex"
 	"errors"
 	"fmt"
 
@@ -11,8 +12,10 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.uber.org/zap"
+	"golang.org/x/sync/errgroup"
 )
 
 var errNoECinfoReturnded = errors.New("no EC info returned")
@@ -84,7 +87,7 @@ func (p *Policer) processECContainerECObject(ctx context.Context, objInfo object
 		// drop local chunk only if all required chunks are in place
 		res.removeLocal = res.removeLocal && p.pullRequiredECChunks(ctx, objInfo, nn[0])
 	}
-	p.adjustECPlacement(ctx, objInfo, nn[0])
+	p.adjustECPlacement(ctx, objInfo, nn[0], policy)
 
 	if res.removeLocal {
 		p.log.Info(logs.PolicerRedundantLocalObjectCopyDetected, zap.Stringer("object", objInfo.Address))
@@ -224,7 +227,7 @@ func (p *Policer) resolveRemoteECChunks(ctx context.Context, parentAddress oid.A
 				}
 				if existed, ok := indexToObjectID[ch.Index]; ok && existed != chunkID {
 					p.log.Error(logs.PolicerDifferentObjectIDForTheSameECChunk, zap.Stringer("first", existed),
-						zap.Stringer("second", chunkID), zap.Stringer("object", parentAddress))
+						zap.Stringer("second", chunkID), zap.Stringer("object", parentAddress), zap.Uint32("index", ch.Index))
 					return false
 				}
 				indexToObjectID[ch.Index] = chunkID
@@ -242,26 +245,146 @@ func (p *Policer) resolveRemoteECChunks(ctx context.Context, parentAddress oid.A
 	return true
 }
 
-func (p *Policer) adjustECPlacement(ctx context.Context, objInfo objectcore.Info, nodes []netmap.NodeInfo) {
+func (p *Policer) adjustECPlacement(ctx context.Context, objInfo objectcore.Info, nodes []netmap.NodeInfo, policy netmap.PlacementPolicy) {
 	var parentAddress oid.Address
 	parentAddress.SetContainer(objInfo.Address.Container())
 	parentAddress.SetObject(objInfo.ECInfo.ParentID)
 	var eiErr *objectSDK.ECInfoError
+	resolved := make(map[uint32][]netmap.NodeInfo)
+	chunkIDs := make(map[uint32]oid.ID)
+	restore := true // do not restore EC chunks if some node returned error
 	for idx, n := range nodes {
-		if uint32(idx) == objInfo.ECInfo.Total {
+		if uint32(idx) >= objInfo.ECInfo.Total && uint32(len(resolved)) == objInfo.ECInfo.Total {
 			return
 		}
+		var err error
 		if p.cfg.netmapKeys.IsLocalKey(n.PublicKey()) {
-			continue
+			_, err = p.localHeader(ctx, parentAddress)
+		} else {
+			_, err = p.remoteHeader(ctx, n, parentAddress, true)
 		}
-		_, err := p.remoteHeader(ctx, n, parentAddress, true)
+
 		if errors.As(err, &eiErr) {
-			continue
+			for _, ch := range eiErr.ECInfo().Chunks {
+				resolved[ch.Index] = append(resolved[ch.Index], n)
+				var ecInfoChunkID oid.ID
+				if err := ecInfoChunkID.ReadFromV2(ch.ID); err != nil {
+					p.log.Error(logs.PolicerFailedToDecodeECChunkID, zap.Error(err), zap.Stringer("object", parentAddress))
+					return
 				}
+				if chunkID, exist := chunkIDs[ch.Index]; exist && chunkID != ecInfoChunkID {
+					p.log.Error(logs.PolicerDifferentObjectIDForTheSameECChunk, zap.Stringer("first", chunkID),
+						zap.Stringer("second", ecInfoChunkID), zap.Stringer("object", parentAddress), zap.Uint32("index", ch.Index))
+					return
+				}
+				chunkIDs[ch.Index] = ecInfoChunkID
+			}
+		} else if !p.cfg.netmapKeys.IsLocalKey(n.PublicKey()) && uint32(idx) < objInfo.ECInfo.Total {
+			p.log.Warn(logs.PolicerCouldNotGetObjectFromNodeMoving, zap.String("node", hex.EncodeToString(n.PublicKey())), zap.Stringer("object", parentAddress), zap.Error(err))
 			p.replicator.HandleReplicationTask(ctx, replicator.Task{
 				NumCopies: 1,
 				Addr:      objInfo.Address,
 				Nodes:     []netmap.NodeInfo{n},
 			}, newNodeCache())
+			restore = false
+		}
+	}
+	if !restore || uint32(len(resolved)) == objInfo.ECInfo.Total {
+		return
+	}
+	if objInfo.ECInfo.Total-uint32(len(resolved)) > policy.ReplicaDescriptor(0).GetECParityCount() {
+		var found []uint32
+		for i := range resolved {
+			found = append(found, i)
+		}
+		p.log.Error(logs.PolicerCouldNotRestoreObjectNotEnoughChunks, zap.Stringer("object", parentAddress), zap.Uint32s("found_chunks", found))
+		return
+	}
+	p.restoreECObject(ctx, objInfo, parentAddress, nodes, resolved, chunkIDs, policy)
+}
+
+func (p *Policer) restoreECObject(ctx context.Context, objInfo objectcore.Info, parentAddress oid.Address, nodes []netmap.NodeInfo, existedChunks map[uint32][]netmap.NodeInfo, chunkIDs map[uint32]oid.ID, policy netmap.PlacementPolicy) {
+	c, err := erasurecode.NewConstructor(int(policy.ReplicaDescriptor(0).GetECDataCount()), int(policy.ReplicaDescriptor(0).GetECParityCount()))
+	if err != nil {
+		p.log.Error(logs.PolicerFailedToRestoreObject, zap.Stringer("object", parentAddress), zap.Error(err))
+		return
+	}
+	parts := p.collectExistedChunks(ctx, objInfo, existedChunks, parentAddress, chunkIDs)
+	if parts == nil {
+		return
+	}
+	key, err := p.keyStorage.GetKey(nil)
+	if err != nil {
+		p.log.Error(logs.PolicerFailedToRestoreObject, zap.Stringer("object", parentAddress), zap.Error(err))
+		return
+	}
+	required := make([]bool, len(parts))
+	for i, p := range parts {
+		if p == nil {
+			required[i] = true
+		}
+	}
+	if err := c.ReconstructParts(parts, required, key); err != nil {
+		p.log.Error(logs.PolicerFailedToRestoreObject, zap.Stringer("object", parentAddress), zap.Error(err))
+		return
+	}
+	for idx, part := range parts {
+		if _, exists := existedChunks[uint32(idx)]; exists {
+			continue
+		}
+		var addr oid.Address
+		addr.SetContainer(parentAddress.Container())
+		pID, _ := part.ID()
+		addr.SetObject(pID)
+		targetNode := nodes[idx%len(nodes)]
+		if p.cfg.netmapKeys.IsLocalKey(targetNode.PublicKey()) {
+			p.replicator.HandleLocalPutTask(ctx, replicator.Task{
+				Addr: addr,
+				Obj:  part,
+			})
+		} else {
+			p.replicator.HandleReplicationTask(ctx, replicator.Task{
+				NumCopies: 1,
+				Addr:      addr,
+				Nodes:     []netmap.NodeInfo{targetNode},
+				Obj:       part,
+			}, newNodeCache())
+		}
 	}
 }
+
+func (p *Policer) collectExistedChunks(ctx context.Context, objInfo objectcore.Info, existedChunks map[uint32][]netmap.NodeInfo, parentAddress oid.Address, chunkIDs map[uint32]oid.ID) []*objectSDK.Object {
+	parts := make([]*objectSDK.Object, objInfo.ECInfo.Total)
+	errGroup, egCtx := errgroup.WithContext(ctx)
+	for idx, nodes := range existedChunks {
+		idx := idx
+		nodes := nodes
+		errGroup.Go(func() error {
+			var objID oid.Address
+			objID.SetContainer(parentAddress.Container())
+			objID.SetObject(chunkIDs[idx])
+			var obj *objectSDK.Object
+			var err error
+			for _, node := range nodes {
+				if p.cfg.netmapKeys.IsLocalKey(node.PublicKey()) {
+					obj, err = p.localObject(egCtx, objID)
+				} else {
+					obj, err = p.remoteObject(egCtx, node, objID)
+				}
+				if err == nil {
+					break
+				}
+				p.log.Warn(logs.PolicerCouldNotGetChunk, zap.Stringer("object", parentAddress), zap.Stringer("chunkID", objID), zap.Error(err), zap.String("node", hex.EncodeToString(node.PublicKey())))
+			}
+			if obj != nil {
+				parts[idx] = obj
+			}
+			return nil
+		})
+	}
+	if err := errGroup.Wait(); err != nil {
+		p.log.Error(logs.PolicerCouldNotGetChunks, zap.Stringer("object", parentAddress), zap.Error(err))
+		return nil
+	}
+	return parts
+}

pkg/services/policer/ec_test.go

@@ -3,6 +3,7 @@ package policer
 import (
 	"bytes"
 	"context"
+	"crypto/rand"
 	"errors"
 	"fmt"
 	"sync/atomic"
@@ -10,13 +11,16 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
 	objectcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/replicator"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/erasurecode"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/stretchr/testify/require"
 )
 
@@ -52,7 +56,7 @@ func TestECChunkHasValidPlacement(t *testing.T) {
 		return nil, errors.New("unexpected placement build")
 	}
 
-	headFn := func(_ context.Context, ni netmapSDK.NodeInfo, a oid.Address, raw bool) (*objectSDK.Object, error) {
+	remoteHeadFn := func(_ context.Context, ni netmapSDK.NodeInfo, a oid.Address, raw bool) (*objectSDK.Object, error) {
 		require.True(t, raw, "remote header for parent object must be called with raw flag")
 		index := int(ni.PublicKey()[0])
 		require.True(t, index == 1 || index == 2, "invalid node to get parent header")
@@ -66,13 +70,25 @@ func TestECChunkHasValidPlacement(t *testing.T) {
 		return nil, objectSDK.NewECInfoError(ei)
 	}
 
+	localHeadFn := func(_ context.Context, a oid.Address) (*objectSDK.Object, error) {
+		require.True(t, a.Container() == chunkAddress.Container() && a.Object() == parentID, "invalid address to get remote header")
+		ei := objectSDK.NewECInfo()
+		var ch objectSDK.ECChunk
+		ch.SetID(oidtest.ID())
+		ch.Index = uint32(0)
+		ch.Total = 3
+		ei.AddChunk(ch)
+		return nil, objectSDK.NewECInfoError(ei)
+	}
+
 	p := New(
 		WithContainerSource(containerSrc),
 		WithPlacementBuilder(placementBuilderFunc(placementBuilder)),
 		WithNetmapKeys(announcedKeysFunc(func(k []byte) bool {
 			return bytes.Equal(k, nodes[0].PublicKey())
 		})),
-		WithRemoteObjectHeaderFunc(headFn),
+		WithRemoteObjectHeaderFunc(remoteHeadFn),
+		WithLocalObjectHeaderFunc(localHeadFn),
 		WithPool(testPool(t)),
 	)
 
@@ -209,11 +225,13 @@ func TestECChunkHasInvalidPlacement(t *testing.T) {
 			})),
 			WithRemoteObjectHeaderFunc(headFn),
 			WithLocalObjectHeaderFunc(localHeadF),
-			WithReplicator(pullFunc(func(ctx context.Context, r replicator.Task) {
+			WithReplicator(&testReplicator{
+				handlePullTask: (func(ctx context.Context, r replicator.Task) {
 					require.True(t, r.Addr.Container() == chunkAddress.Container() && r.Addr.Object() == requiredChunkID &&
 						len(r.Nodes) == 1 && bytes.Equal(r.Nodes[0].PublicKey(), nodes[1].PublicKey()), "invalid pull task")
 					pullCounter.Add(1)
-			})),
+				}),
+			}),
 			WithRedundantCopyCallback(func(ctx context.Context, a oid.Address) {
 				require.True(t, allowDrop, "invalid redundent copy call")
 				dropped = append(dropped, a)
@@ -367,9 +385,11 @@ func TestECChunkHasInvalidPlacement(t *testing.T) {
 			WithRedundantCopyCallback(func(ctx context.Context, a oid.Address) {
 				dropped = append(dropped, a)
 			}),
-			WithReplicator(replicatorFunc(func(ctx context.Context, t replicator.Task, tr replicator.TaskResult) {
+			WithReplicator(&testReplicator{
+				handleReplicationTask: func(ctx context.Context, t replicator.Task, tr replicator.TaskResult) {
 					replicated = append(replicated, t)
-			})),
+				},
+			}),
 			WithPool(testPool(t)),
 		)
 
@@ -391,12 +411,155 @@ func TestECChunkHasInvalidPlacement(t *testing.T) {
 	})
 }
 
-type pullFunc func(context.Context, replicator.Task)
+func TestECChunkRestore(t *testing.T) {
+	// node0 has chunk0, node1 has chunk1
+	// policer should replicate chunk0 to node2 on the first run
+	// then restore EC object and replicate chunk2 to node2 on the second run
+	t.Parallel()
 
-func (f pullFunc) HandleReplicationTask(ctx context.Context, task replicator.Task, res replicator.TaskResult) {
+	payload := make([]byte, 64)
-	panic("not implemented")
+	rand.Read(payload)
-}
+	parentAddress := oidtest.Address()
+	parentObject := objectSDK.New()
+	parentObject.SetContainerID(parentAddress.Container())
+	parentObject.SetPayload(payload)
+	parentObject.SetPayloadSize(64)
+	objectSDK.CalculateAndSetPayloadChecksum(parentObject)
+	err := objectSDK.CalculateAndSetID(parentObject)
+	require.NoError(t, err)
+	id, _ := parentObject.ID()
+	parentAddress.SetObject(id)
 
-func (f pullFunc) HandlePullTask(ctx context.Context, task replicator.Task) {
+	chunkIDs := make([]oid.ID, 3)
-	f(ctx, task)
+	c, err := erasurecode.NewConstructor(2, 1)
+	require.NoError(t, err)
+	key, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+	chunks, err := c.Split(parentObject, &key.PrivateKey)
+	require.NoError(t, err)
+	for i, ch := range chunks {
+		chunkIDs[i], _ = ch.ID()
+	}
+
+	var policy netmapSDK.PlacementPolicy
+	require.NoError(t, policy.DecodeString("EC 2.1"))
+
+	cnr := &container.Container{}
+	cnr.Value.Init()
+	cnr.Value.SetPlacementPolicy(policy)
+	containerSrc := containerSrc{
+		get: func(id cid.ID) (*container.Container, error) {
+			if id.Equals(parentAddress.Container()) {
+				return cnr, nil
+			}
+			return nil, new(apistatus.ContainerNotFound)
+		},
+	}
+
+	nodes := make([]netmapSDK.NodeInfo, 4)
+	for i := range nodes {
+		nodes[i].SetPublicKey([]byte{byte(i)})
+	}
+
+	placementBuilder := func(cnr cid.ID, obj *oid.ID, p netmapSDK.PlacementPolicy) ([][]netmapSDK.NodeInfo, error) {
+		if cnr.Equals(parentAddress.Container()) && obj.Equals(parentAddress.Object()) {
+			return [][]netmapSDK.NodeInfo{nodes}, nil
+		}
+		return nil, errors.New("unexpected placement build")
+	}
+	var secondRun bool
+	remoteHeadFn := func(_ context.Context, ni netmapSDK.NodeInfo, a oid.Address, raw bool) (*objectSDK.Object, error) {
+		require.True(t, raw, "remote header for parent object must be called with raw flag")
+		index := int(ni.PublicKey()[0])
+		require.True(t, index == 1 || index == 2 || index == 3, "invalid node to get parent header")
+		require.True(t, a == parentAddress, "invalid address to get remote header")
+		if index == 1 {
+			ei := objectSDK.NewECInfo()
+			var ch objectSDK.ECChunk
+			ch.SetID(chunkIDs[1])
+			ch.Index = uint32(1)
+			ch.Total = 3
+			ei.AddChunk(ch)
+			return nil, objectSDK.NewECInfoError(ei)
+		}
+		if index == 2 && secondRun {
+			ei := objectSDK.NewECInfo()
+			var ch objectSDK.ECChunk
+			ch.SetID(chunkIDs[0])
+			ch.Index = uint32(0)
+			ch.Total = 3
+			ei.AddChunk(ch)
+			return nil, objectSDK.NewECInfoError(ei)
+		}
+		return nil, new(apistatus.ObjectNotFound)
+	}
+
+	localHeadFn := func(_ context.Context, a oid.Address) (*objectSDK.Object, error) {
+		require.True(t, a == parentAddress, "invalid address to get remote header")
+		ei := objectSDK.NewECInfo()
+		var ch objectSDK.ECChunk
+		ch.SetID(chunkIDs[0])
+		ch.Index = uint32(0)
+		ch.Total = 3
+		ei.AddChunk(ch)
+		return nil, objectSDK.NewECInfoError(ei)
+	}
+
+	var replicatedObj []*objectSDK.Object
+	p := New(
+		WithContainerSource(containerSrc),
+		WithPlacementBuilder(placementBuilderFunc(placementBuilder)),
+		WithNetmapKeys(announcedKeysFunc(func(k []byte) bool {
+			return bytes.Equal(k, nodes[0].PublicKey())
+		})),
+		WithRemoteObjectHeaderFunc(remoteHeadFn),
+		WithLocalObjectHeaderFunc(localHeadFn),
+		WithReplicator(&testReplicator{
+			handleReplicationTask: func(ctx context.Context, t replicator.Task, tr replicator.TaskResult) {
+				if t.Obj != nil {
+					replicatedObj = append(replicatedObj, t.Obj)
+				}
+			},
+		}),
+		WithLocalObjectGetFunc(func(ctx context.Context, a oid.Address) (*objectSDK.Object, error) {
+			require.True(t, a.Container() == parentAddress.Container() && a.Object() == chunkIDs[0], "invalid local object request")
+			return chunks[0], nil
+		}),
+		WithRemoteObjectGetFunc(func(ctx context.Context, ni netmapSDK.NodeInfo, a oid.Address) (*objectSDK.Object, error) {
+			index := ni.PublicKey()[0]
+			if index == 2 {
+				return nil, new(apistatus.ObjectNotFound)
+			}
+			return chunks[index], nil
+		}),
+		WithPool(testPool(t)),
+		WithKeyStorage(util.NewKeyStorage(&key.PrivateKey, nil, nil)),
+	)
+
+	var chunkAddress oid.Address
+	chunkAddress.SetContainer(parentAddress.Container())
+	chunkAddress.SetObject(chunkIDs[0])
+	objInfo := objectcore.Info{
+		Address: chunkAddress,
+		Type:    objectSDK.TypeRegular,
+		ECInfo: &objectcore.ECInfo{
+			ParentID: parentAddress.Object(),
+			Index:    0,
+			Total:    3,
+		},
+	}
+	err = p.processObject(context.Background(), objInfo)
+	require.NoError(t, err)
+	secondRun = true
+	err = p.processObject(context.Background(), objInfo)
+	require.NoError(t, err)
+
+	require.Equal(t, 1, len(replicatedObj), "invalid replicated objects count")
+	chunks[2].SetSignature(nil)
+	expectedData, err := chunks[2].MarshalJSON()
+	require.NoError(t, err)
+	replicatedObj[0].SetSignature(nil)
+	actualData, err := replicatedObj[0].MarshalJSON()
+	require.NoError(t, err)
+	require.EqualValues(t, string(expectedData), string(actualData), "invalid restored objects")
 }

pkg/services/policer/option.go

@@ -7,6 +7,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
 	objectcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/replicator"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
@@ -37,6 +38,7 @@ type BuryFunc func(context.Context, oid.Address) error
 type Replicator interface {
 	HandleReplicationTask(ctx context.Context, task replicator.Task, res replicator.TaskResult)
 	HandlePullTask(ctx context.Context, task replicator.Task)
+	HandleLocalPutTask(ctx context.Context, task replicator.Task)
 }
 
 // RemoteObjectHeaderFunc is the function to obtain HEAD info from a specific remote node.
@@ -45,6 +47,10 @@ type RemoteObjectHeaderFunc func(context.Context, netmapSDK.NodeInfo, oid.Addres
 // LocalObjectHeaderFunc is the function to obtain HEAD info from the current node.
 type LocalObjectHeaderFunc func(context.Context, oid.Address) (*objectSDK.Object, error)
 
+type RemoteObjectGetFunc func(context.Context, netmapSDK.NodeInfo, oid.Address) (*objectSDK.Object, error)
+
+type LocalObjectGetFunc func(context.Context, oid.Address) (*objectSDK.Object, error)
+
 type cfg struct {
 	headTimeout time.Duration
 
@@ -75,6 +81,12 @@ type cfg struct {
 	evictDuration, sleepDuration time.Duration
 
 	metrics MetricsRegister
+
+	remoteObject RemoteObjectGetFunc
+
+	localObject LocalObjectGetFunc
+
+	keyStorage *util.KeyStorage
 }
 
 func defaultCfg() *cfg {
@@ -145,6 +157,18 @@ func WithLocalObjectHeaderFunc(v LocalObjectHeaderFunc) Option {
 	}
 }
 
+func WithRemoteObjectGetFunc(v RemoteObjectGetFunc) Option {
+	return func(c *cfg) {
+		c.remoteObject = v
+	}
+}
+
+func WithLocalObjectGetFunc(v LocalObjectGetFunc) Option {
+	return func(c *cfg) {
+		c.localObject = v
+	}
+}
+
 // WithNetmapKeys returns option to set tool to work with announced public keys.
 func WithNetmapKeys(v netmap.AnnouncedKeys) Option {
 	return func(c *cfg) {
@@ -182,3 +206,9 @@ func WithMetrics(m MetricsRegister) Option {
 		c.metrics = m
 	}
 }
+
+func WithKeyStorage(ks *util.KeyStorage) Option {
+	return func(c *cfg) {
+		c.keyStorage = ks
+	}
+}

pkg/services/policer/policer_test.go

@@ -249,12 +249,14 @@ func TestProcessObject(t *testing.T) {
 					require.True(t, a.Equals(addr), "unexpected redundant copy callback: a=%v", a)
 					gotRemoveRedundant = true
 				}),
-				WithReplicator(replicatorFunc(func(_ context.Context, task replicator.Task, res replicator.TaskResult) {
+				WithReplicator(&testReplicator{
+					handleReplicationTask: func(_ context.Context, task replicator.Task, res replicator.TaskResult) {
 						require.True(t, task.Addr.Equals(addr), "unexpected replicator task: %+v", task)
 						for _, node := range task.Nodes {
 							gotReplicateTo = append(gotReplicateTo, int(node.PublicKey()[0]))
 						}
-				})),
+					},
+				}),
 				WithPool(testPool(t)),
 			)
 
@@ -440,13 +442,20 @@ type announcedKeysFunc func([]byte) bool
 
 func (f announcedKeysFunc) IsLocalKey(k []byte) bool { return f(k) }
 
-// replicatorFunc is a Replicator backed by a function.
+type testReplicator struct {
-type replicatorFunc func(context.Context, replicator.Task, replicator.TaskResult)
+	handleReplicationTask func(ctx context.Context, task replicator.Task, res replicator.TaskResult)
-
+	handleLocalPutTask    func(ctx context.Context, task replicator.Task)
-func (f replicatorFunc) HandleReplicationTask(ctx context.Context, task replicator.Task, res replicator.TaskResult) {
+	handlePullTask        func(ctx context.Context, task replicator.Task)
-	f(ctx, task, res)
 }
 
-func (f replicatorFunc) HandlePullTask(ctx context.Context, task replicator.Task) {
+func (r *testReplicator) HandleReplicationTask(ctx context.Context, task replicator.Task, res replicator.TaskResult) {
-	panic("not implemented")
+	r.handleReplicationTask(ctx, task, res)
+}
+
+func (r *testReplicator) HandleLocalPutTask(ctx context.Context, task replicator.Task) {
+	r.handleLocalPutTask(ctx, task)
+}
+
+func (r *testReplicator) HandlePullTask(ctx context.Context, task replicator.Task) {
+	r.handlePullTask(ctx, task)
 }

pkg/services/replicator/put.go

@@ -0,0 +1,47 @@
+package replicator
+
+import (
+	"context"
+	"errors"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/engine"
+	tracingPkg "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/tracing"
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+	"go.uber.org/zap"
+)
+
+var errObjectNotDefined = errors.New("object is not defined")
+
+func (p *Replicator) HandleLocalPutTask(ctx context.Context, task Task) {
+	p.metrics.IncInFlightRequest()
+	defer p.metrics.DecInFlightRequest()
+	defer func() {
+		p.log.Debug(logs.ReplicatorFinishWork, zap.String("type", "pull"))
+	}()
+
+	ctx, span := tracing.StartSpanFromContext(ctx, "Replicator.HandleLocalPutTask",
+		trace.WithAttributes(
+			attribute.Stringer("address", task.Addr),
+			attribute.Int("nodes_count", len(task.Nodes)),
+		))
+	defer span.End()
+
+	if task.Obj == nil {
+		p.log.Error(logs.ReplicatorCouldNotPutObjectToLocalStorage,
+			zap.Stringer("object", task.Addr),
+			zap.Error(errObjectNotDefined),
+			zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
+		return
+	}
+
+	err := engine.Put(ctx, p.localStorage, task.Obj)
+	if err != nil {
+		p.log.Error(logs.ReplicatorCouldNotPutObjectToLocalStorage,
+			zap.Stringer("object", task.Addr),
+			zap.Error(err),
+			zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
+	}
+}