[#1350] node: Add ability to evacuate objects from REP 1 only

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

cmd/frostfs-cli/modules/control/evacuation.go

@@ -20,6 +20,7 @@ const (
 	awaitFlag      = "await"
 	noProgressFlag = "no-progress"
 	scopeFlag      = "scope"
+	repOneOnlyFlag = "rep-one-only"
 
 	containerWorkerCountFlag = "container-worker-count"
 	objectWorkerCountFlag    = "object-worker-count"
@@ -69,6 +70,7 @@ func startEvacuateShard(cmd *cobra.Command, _ []string) {
 	ignoreErrors, _ := cmd.Flags().GetBool(ignoreErrorsFlag)
 	containerWorkerCount, _ := cmd.Flags().GetUint32(containerWorkerCountFlag)
 	objectWorkerCount, _ := cmd.Flags().GetUint32(objectWorkerCountFlag)
+	repOneOnly, _ := cmd.Flags().GetBool(repOneOnlyFlag)
 
 	req := &control.StartShardEvacuationRequest{
 		Body: &control.StartShardEvacuationRequest_Body{
@@ -77,6 +79,7 @@ func startEvacuateShard(cmd *cobra.Command, _ []string) {
 			Scope:                getEvacuationScope(cmd),
 			ContainerWorkerCount: containerWorkerCount,
 			ObjectWorkerCount:    objectWorkerCount,
+			RepOneOnly:           repOneOnly,
 		},
 	}
 
@@ -380,6 +383,7 @@ func initControlStartEvacuationShardCmd() {
 	flags.Bool(noProgressFlag, false, fmt.Sprintf("Print progress if %s provided", awaitFlag))
 	flags.Uint32(containerWorkerCountFlag, 0, "Count of concurrent container evacuation workers")
 	flags.Uint32(objectWorkerCountFlag, 0, "Count of concurrent object evacuation workers")
+	flags.Bool(repOneOnlyFlag, false, "Evacuate objects only from containers with policy 'REP 1 ...'")
 
 	startEvacuationShardCmd.MarkFlagsMutuallyExclusive(shardIDFlag, shardAllFlag)
 }

docs/evacuation.md

@@ -20,7 +20,9 @@ Because it is necessary to prevent removing by policer objects with policy `REP
 
 ## Commands
 
-`frostfs-cli control shards evacuation start` starts evacuation process for shards specified. To start evacuating all node shards, use the `--all` flag. By default, objects and trees are evacuated. To limit the evacuation scope, use `--scope` flag (possible values are `all`, `trees`, `objects`).
+`frostfs-cli control shards evacuation start` starts evacuation process for shards specified. To start evacuating all node shards, use the `--all` flag.
+By default, objects and trees are evacuated. To limit the evacuation scope, use `--scope` flag (possible values are `all`, `trees`, `objects`).
+To evacuate objects only from containers with policy `REP 1` use option `--rep-one-only`.
 
 `frostfs-cli control shards evacuation stop` stops running evacuation process.
 

pkg/local_object_storage/engine/evacuate.go

@@ -88,6 +88,7 @@ type EvacuateShardPrm struct {
 	IgnoreErrors   bool
 	Async          bool
 	Scope          EvacuateScope
+	RepOneOnly     bool
 
 	ContainerWorkerCount uint32
 	ObjectWorkerCount    uint32
@@ -288,6 +289,7 @@ func (e *StorageEngine) evacuateShards(ctx context.Context, shardIDs []string, p
 			attribute.Bool("async", prm.Async),
 			attribute.Bool("ignoreErrors", prm.IgnoreErrors),
 			attribute.Stringer("scope", prm.Scope),
+			attribute.Bool("repOneOnly", prm.RepOneOnly),
 		))
 
 	defer func() {
@@ -430,13 +432,28 @@ func (e *StorageEngine) evacuateShardObjects(ctx context.Context, cancel context
 ) error {
 	sh := shardsToEvacuate[shardID]
 	var cntPrm shard.IterateOverContainersPrm
-	cntPrm.Handler = func(ctx context.Context, name []byte, _ cid.ID) error {
+	cntPrm.Handler = func(ctx context.Context, name []byte, cnt cid.ID) error {
 		select {
 		case <-ctx.Done():
 			return context.Cause(ctx)
 		default:
 		}
 		egContainer.Go(func() error {
+			if prm.RepOneOnly {
+				notRepOne, err := e.isNotRepOne(cnt)
+				if err != nil {
+					return err
+				}
+				if notRepOne {
+					countPrm := shard.CountAliveObjectsInBucketPrm{BucketName: name}
+					count, err := sh.CountAliveObjectsInBucket(ctx, countPrm)
+					if err != nil {
+						return err
+					}
+					res.objSkipped.Add(count)
+					return nil
+				}
+			}
 			var objPrm shard.IterateOverObjectsInContainerPrm
 			objPrm.BucketName = name
 			objPrm.Handler = func(ctx context.Context, objInfo *object.Info) error {
@@ -781,6 +798,20 @@ func (e *StorageEngine) evacuateObject(ctx context.Context, shardID string, objI
 	return nil
 }
 
+func (e *StorageEngine) isNotRepOne(cid cid.ID) (bool, error) {
+	c, err := e.containerSource.Load().cs.Get(cid)
+	if err != nil {
+		return false, err
+	}
+	p := c.Value.PlacementPolicy()
+	for i := range p.NumberOfReplicas() {
+		if p.ReplicaDescriptor(i).NumberOfObjects() == 1 {
+			return false, nil
+		}
+	}
+	return true, nil
+}
+
 func (e *StorageEngine) tryEvacuateObjectLocal(ctx context.Context, addr oid.Address, object *objectSDK.Object, sh *shard.Shard,
 	shards []pooledShard, shardsToEvacuate map[string]*shard.Shard, res *EvacuateShardRes,
 ) (bool, error) {

pkg/local_object_storage/engine/evacuate_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	coreContainer "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/local_object_storage/blobstor"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
@@ -20,14 +21,31 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger/test"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/sync/errgroup"
 )
 
+type containerStorage struct {
+	cntmap map[cid.ID]*container.Container
+}
+
+func (cs *containerStorage) Get(id cid.ID) (*coreContainer.Container, error) {
+	coreCnt := coreContainer.Container{
+		Value: *cs.cntmap[id],
+	}
+	return &coreCnt, nil
+}
+
+func (cs *containerStorage) DeletionInfo(cid.ID) (*coreContainer.DelInfo, error) {
+	return nil, nil
+}
+
 func newEngineEvacuate(t *testing.T, shardNum int, objPerShard int) (*StorageEngine, []*shard.ID, []*objectSDK.Object) {
 	dir := t.TempDir()
 
@@ -641,3 +659,68 @@ func TestEvacuateTreesRemote(t *testing.T) {
 
 	require.Equal(t, expectedTreeOps, evacuatedTreeOps)
 }
+
+func TestEvacuateShardObjectsRepOneOnly(t *testing.T) {
+	e, ids, _ := newEngineEvacuate(t, 2, 0)
+	defer func() {
+		require.NoError(t, e.Close(context.Background()))
+	}()
+
+	// Create container with policy REP 2
+	cnr1 := container.Container{}
+	p1 := netmap.PlacementPolicy{}
+	p1.SetContainerBackupFactor(1)
+	x1 := netmap.ReplicaDescriptor{}
+	x1.SetNumberOfObjects(2)
+	p1.AddReplicas(x1)
+	cnr1.SetPlacementPolicy(p1)
+
+	var idCnr1 cid.ID
+	container.CalculateID(&idCnr1, cnr1)
+
+	cnrmap := make(map[cid.ID]*container.Container)
+	var cids []cid.ID
+	cnrmap[idCnr1] = &cnr1
+	cids = append(cids, idCnr1)
+
+	// Create container with policy REP 1
+	cnr2 := container.Container{}
+	p2 := netmap.PlacementPolicy{}
+	p2.SetContainerBackupFactor(1)
+	x2 := netmap.ReplicaDescriptor{}
+	x2.SetNumberOfObjects(1)
+	p2.AddReplicas(x2)
+	cnr2.SetPlacementPolicy(p2)
+
+	var idCnr2 cid.ID
+	container.CalculateID(&idCnr2, cnr2)
+	cnrmap[idCnr2] = &cnr2
+	cids = append(cids, idCnr2)
+
+	e.SetContainerSource(&containerStorage{cntmap: cnrmap})
+
+	for _, sh := range ids {
+		for j := range 2 {
+			for range 4 {
+				obj := testutil.GenerateObjectWithCID(cids[j])
+				var putPrm shard.PutPrm
+				putPrm.SetObject(obj)
+				_, err := e.shards[sh.String()].Put(context.Background(), putPrm)
+				require.NoError(t, err)
+			}
+		}
+	}
+
+	var prm EvacuateShardPrm
+	prm.ShardID = ids[0:1]
+	prm.Scope = EvacuateScopeObjects
+	prm.RepOneOnly = true
+
+	require.NoError(t, e.shards[ids[0].String()].SetMode(mode.ReadOnly))
+
+	res, err := e.Evacuate(context.Background(), prm)
+	require.NoError(t, err)
+	require.Equal(t, uint64(4), res.ObjectsEvacuated())
+	require.Equal(t, uint64(4), res.ObjectsSkipped())
+	require.Equal(t, uint64(0), res.ObjectsFailed())
+}

pkg/local_object_storage/metabase/list.go

@@ -76,6 +76,12 @@ type IterateOverObjectsInContainerPrm struct {
 	Handler func(context.Context, *objectcore.Info) error
 }
 
+// CountAliveObjectsInBucketPrm contains parameters for IterateOverObjectsInContainer operation.
+type CountAliveObjectsInBucketPrm struct {
+	// BucketName container's bucket name
+	BucketName []byte
+}
+
 // ListWithCursor lists physical objects available in metabase starting from
 // cursor. Includes objects of all types. Does not include inhumed objects.
 // Use cursor value from response for consecutive requests.
@@ -426,3 +432,44 @@ func (db *DB) iterateOverObjectsInContainer(ctx context.Context, tx *bbolt.Tx, c
 	}
 	return nil
 }
+
+// CountAliveObjectsInBucket count objects in bucket which aren't in graveyard or garbage.
+func (db *DB) CountAliveObjectsInBucket(ctx context.Context, prm CountAliveObjectsInBucketPrm) (uint64, error) {
+	var (
+		startedAt = time.Now()
+		success   = false
+	)
+	defer func() {
+		db.metrics.AddMethodDuration("CountAliveObjectsInBucket", time.Since(startedAt), success)
+	}()
+	_, span := tracing.StartSpanFromContext(ctx, "metabase.CountAliveObjectsInBucket")
+	defer span.End()
+
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return 0, ErrDegradedMode
+	}
+	var count uint64
+	err := db.boltDB.View(func(tx *bbolt.Tx) error {
+		bkt := tx.Bucket(prm.BucketName)
+		graveyardBkt := tx.Bucket(graveyardBucketName)
+		garbageBkt := tx.Bucket(garbageBucketName)
+		c := bkt.Cursor()
+		k, _ := c.First()
+		cidRaw := prm.BucketName[1:bucketKeySize]
+		if cidRaw == nil {
+			return nil
+		}
+		for ; k != nil; k, _ = c.Next() {
+			if inGraveyardWithKey(append(cidRaw, k...), graveyardBkt, garbageBkt) > 0 {
+				continue
+			}
+			count++
+		}
+		return nil
+	})
+	success = err == nil
+	return count, metaerr.Wrap(err)
+}

pkg/local_object_storage/shard/list.go

@@ -48,6 +48,12 @@ type IterateOverObjectsInContainerPrm struct {
 	Handler func(context.Context, *objectcore.Info) error
 }
 
+// CountAliveObjectsInBucketPrm contains parameters for CountAliveObjectsInBucket operation.
+type CountAliveObjectsInBucketPrm struct {
+	// BucketName container's bucket name
+	BucketName []byte
+}
+
 // ListWithCursorPrm contains parameters for ListWithCursor operation.
 type ListWithCursorPrm struct {
 	count  uint32
@@ -229,3 +235,22 @@ func (s *Shard) IterateOverObjectsInContainer(ctx context.Context, prm IterateOv
 
 	return nil
 }
+
+// CountAliveObjectsInBucket count objects in bucket which aren't in graveyard or garbage.
+func (s *Shard) CountAliveObjectsInBucket(ctx context.Context, prm CountAliveObjectsInBucketPrm) (uint64, error) {
+	_, span := tracing.StartSpanFromContext(ctx, "shard.IterateOverObjectsInContainer")
+	defer span.End()
+
+	if s.GetMode().NoMetabase() {
+		return 0, ErrDegradedMode
+	}
+
+	var metaPrm meta.CountAliveObjectsInBucketPrm
+	metaPrm.BucketName = prm.BucketName
+	count, err := s.metaBase.CountAliveObjectsInBucket(ctx, metaPrm)
+	if err != nil {
+		return 0, fmt.Errorf("could not count alive objects in bucket: %w", err)
+	}
+
+	return count, nil
+}

pkg/services/control/server/evacuate_async.go

@@ -31,6 +31,7 @@ func (s *Server) StartShardEvacuation(ctx context.Context, req *control.StartSha
 		Scope:                engine.EvacuateScope(req.GetBody().GetScope()),
 		ContainerWorkerCount: req.GetBody().GetContainerWorkerCount(),
 		ObjectWorkerCount:    req.GetBody().GetObjectWorkerCount(),
+		RepOneOnly:           req.GetBody().GetRepOneOnly(),
 	}
 
 	_, err = s.s.Evacuate(ctx, prm)

pkg/services/control/service.proto

@@ -398,6 +398,8 @@ message StartShardEvacuationRequest {
     uint32 container_worker_count = 4;
     // Count of concurrent object evacuation workers.
     uint32 object_worker_count = 5;
+    // Choose for evacuation objects in `REP 1` containers only.
+    bool rep_one_only = 6;
   }
 
   Body body = 1;