[#xx] node: Evacuate objects without setting mode to MAINTENANCE

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

pkg/local_object_storage/engine/evacuate.go

@@ -366,6 +366,7 @@ func (e *StorageEngine) evacuateShardObjects(ctx context.Context, shardID string
 	listPrm.WithCount(defaultEvacuateBatchSize)
 
 	sh := shardsToEvacuate[shardID]
+	sh.SetEvacInProgress(true)
 
 	var c *meta.Cursor
 	for {
@@ -655,6 +656,7 @@ func (e *StorageEngine) evacuateObjects(ctx context.Context, sh *shard.Shard, to
 
 		var getPrm shard.GetPrm
 		getPrm.SetAddress(addr)
+		getPrm.SkipEvacCheck(true)
 
 		getRes, err := sh.Get(ctx, getPrm)
 		if err != nil {

pkg/local_object_storage/engine/evacuate_test.go

@@ -125,6 +125,34 @@ func TestEvacuateShardObjects(t *testing.T) {
 	// Second case ensures that all objects are indeed moved and available.
 	checkHasObjects(t)
 
+	// Objects on evacuated shards should be logically unavailable, but persisted on disk.
+	// This is necessary to prevent removing it by policer in case of `REP 1` policy.
+	for _, obj := range objects[len(objects)-objPerShard:] {
+		var prmGet shard.GetPrm
+		prmGet.SetAddress(objectCore.AddressOf(obj))
+		_, err = e.shards[evacuateShardID].Get(context.Background(), prmGet)
+		require.Error(t, err)
+
+		prmGet.SkipEvacCheck(true)
+		_, err = e.shards[evacuateShardID].Get(context.Background(), prmGet)
+		require.NoError(t, err)
+
+		var prmHead shard.HeadPrm
+		prmHead.SetAddress(objectCore.AddressOf(obj))
+		_, err = e.shards[evacuateShardID].Head(context.Background(), prmHead)
+		require.Error(t, err)
+
+		var existsPrm shard.ExistsPrm
+		existsPrm.Address = objectCore.AddressOf(obj)
+		_, err = e.shards[evacuateShardID].Exists(context.Background(), existsPrm)
+		require.Error(t, err)
+
+		var rngPrm shard.RngPrm
+		rngPrm.SetAddress(objectCore.AddressOf(obj))
+		_, err = e.shards[evacuateShardID].GetRange(context.Background(), rngPrm)
+		require.Error(t, err)
+	}
+
 	// Calling it again is OK, but all objects are already moved, so no new PUTs should be done.
 	res, err = e.Evacuate(context.Background(), prm)
 	require.NoError(t, err)

pkg/local_object_storage/shard/exists.go

@@ -5,7 +5,9 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
 	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
@@ -60,6 +62,8 @@ func (s *Shard) Exists(ctx context.Context, prm ExistsPrm) (ExistsRes, error) {
 
 	if s.info.Mode.Disabled() {
 		return ExistsRes{}, ErrShardDisabled
+	} else if s.info.EvacInProgress {
+		return ExistsRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
 	} else if s.info.Mode.NoMetabase() {
 		var p common.ExistsPrm
 		p.Address = prm.Address

pkg/local_object_storage/shard/get.go

@@ -29,6 +29,7 @@ type storFetcher = func(stor *blobstor.BlobStor, id []byte) (*objectSDK.Object,
 type GetPrm struct {
 	addr          oid.Address
 	skipMeta      bool
+	skipEvacCheck bool
 }
 
 // GetRes groups the resulting values of Get operation.
@@ -50,6 +51,11 @@ func (p *GetPrm) SetIgnoreMeta(ignore bool) {
 	p.skipMeta = ignore
 }
 
+// SkipEvacCheck is a Get option which instruct to skip check is evacuation in progress.
+func (p *GetPrm) SkipEvacCheck(val bool) {
+	p.skipEvacCheck = val
+}
+
 // Object returns the requested object.
 func (r GetRes) Object() *objectSDK.Object {
 	return r.obj
@@ -85,6 +91,10 @@ func (s *Shard) Get(ctx context.Context, prm GetPrm) (GetRes, error) {
 		return GetRes{}, ErrShardDisabled
 	}
 
+	if s.info.EvacInProgress && !prm.skipEvacCheck {
+		return GetRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
+	}
+
 	cb := func(stor *blobstor.BlobStor, id []byte) (*objectSDK.Object, error) {
 		var getPrm common.GetPrm
 		getPrm.Address = prm.addr

pkg/local_object_storage/shard/head.go

@@ -4,7 +4,9 @@ import (
 	"context"
 
 	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.opentelemetry.io/otel/attribute"
@@ -70,6 +72,11 @@ func (s *Shard) Head(ctx context.Context, prm HeadPrm) (HeadRes, error) {
 		res, err = s.Get(ctx, getPrm)
 		obj = res.Object()
 	} else {
+		s.m.RLock()
+		defer s.m.RUnlock()
+		if s.info.EvacInProgress {
+			return HeadRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
+		}
 		var headParams meta.GetPrm
 		headParams.SetAddress(prm.addr)
 		headParams.SetRaw(prm.raw)

pkg/local_object_storage/shard/info.go

@@ -16,6 +16,9 @@ type Info struct {
 	// Shard mode.
 	Mode mode.Mode
 
+	// True when evacuation is in progress.
+	EvacInProgress bool
+
 	// Information about the metabase.
 	MetaBaseInfo meta.Info
 

pkg/local_object_storage/shard/range.go

@@ -87,6 +87,10 @@ func (s *Shard) GetRange(ctx context.Context, prm RngPrm) (RngRes, error) {
 	s.m.RLock()
 	defer s.m.RUnlock()
 
+	if s.info.EvacInProgress {
+		return RngRes{}, logicerr.Wrap(new(apistatus.ObjectNotFound))
+	}
+
 	if s.info.Mode.Disabled() {
 		return RngRes{}, ErrShardDisabled
 	}

pkg/local_object_storage/shard/shard.go

@@ -579,3 +579,9 @@ func (s *Shard) DeleteShardMetrics() {
 		s.cfg.metricsWriter.DeleteShardMetrics()
 	}
 }
+
+func (s *Shard) SetEvacInProgress(val bool) {
+	s.m.Lock()
+	defer s.m.Unlock()
+	s.info.EvacInProgress = val
+}