[#9999] metabase: Fix db engine to pebble in shard_id.go

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

pkg/local_object_storage/metabase/shard_id.go

@@ -8,13 +8,10 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
 	metamode "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
-	"go.etcd.io/bbolt"
+	"github.com/cockroachdb/pebble"
 )
 
-var (
-	shardInfoBucket = []byte{shardInfoPrefix}
-	shardIDKey      = []byte("id")
-)
+var shardIDKey = []byte("id")
 
 // GetShardID sets metabase operation mode
 // and reads shard id from db.
@@ -47,11 +44,12 @@ func (db *DB) GetShardID(mode metamode.Mode) ([]byte, error) {
 // If id is missing, returns nil, nil.
 func (db *DB) readShardID() ([]byte, error) {
 	var id []byte
-	err := db.database.View(func(tx *bbolt.Tx) error {
-		b := tx.Bucket(shardInfoBucket)
-		if b != nil {
-			id = bytes.Clone(b.Get(shardIDKey))
+	err := db.snapshot(func(s *pebble.Snapshot) error {
+		v, err := valueSafe(s, shardInfoKey(shardIDKey))
+		if err != nil {
+			return err
 		}
+		id = bytes.Clone(v)
 		return nil
 	})
 	return id, metaerr.Wrap(err)
@@ -86,11 +84,7 @@ func (db *DB) SetShardID(id []byte, mode metamode.Mode) error {
 
 // writeShardID writes shard id to db.
 func (db *DB) writeShardID(id []byte) error {
-	return metaerr.Wrap(db.database.Update(func(tx *bbolt.Tx) error {
-		b, err := tx.CreateBucketIfNotExists(shardInfoBucket)
-		if err != nil {
-			return err
-		}
-		return b.Put(shardIDKey, id)
+	return metaerr.Wrap(db.batch(func(b *pebble.Batch) error {
+		return b.Set(shardInfoKey(shardIDKey), id, pebble.Sync)
 	}))
 }

pkg/local_object_storage/metabase/util.go

@@ -669,3 +669,10 @@ func addressFromExpiredKey(key []byte) (oid.Address, error) {
 	result.SetContainer(cnr)
 	return result, nil
 }
+
+func shardInfoKey(key []byte) []byte {
+	result := make([]byte, len(key))
+	result[0] = shardInfoPrefix
+	copy(result[1:], key)
+	return result
+}