From 9ac1093805a6f65ff77bab1b0a4c38750440cc23 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@morphbits.ru>
Date: Wed, 5 Oct 2022 14:40:37 +0300
Subject: [PATCH 1/5] [#1840] neofs-node: Allow to use `mode: disabled` in
 config

Currently, when removing shard special care must be taken with respect
to shard numbering. `mode: disabled` allows to leave shard configuration
in place while also ignoring it during initialization. This makes
disk replacement much more convenient.

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
---
 CHANGELOG.md                                 | 1 +
 cmd/neofs-node/config/engine/config.go       | 9 ++++++++-
 cmd/neofs-node/config/engine/shard/config.go | 2 ++
 pkg/local_object_storage/shard/mode/mode.go  | 9 +++++++++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13fe707c3b1..ce889b1ba5b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ Changelog for NeoFS Node
 - `flush-cache` control service command to flush write-cache (#1806)
 - `wallet-address` flag in `neofs-adm morph refill-gas` command (#1820)
 - Validate policy before container creation (#1704)
+- Shards can be marked with `mode: disabled` to be ignored by node (#1840)
 
 ### Changed
 - Allow to evacuate shard data with `EvacuateShard` control RPC (#1800)
diff --git a/cmd/neofs-node/config/engine/config.go b/cmd/neofs-node/config/engine/config.go
index 0fc9e01ebac..86f6b70c4a4 100644
--- a/cmd/neofs-node/config/engine/config.go
+++ b/cmd/neofs-node/config/engine/config.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-node/config"
 	shardconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/engine/shard"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
 )
 
 const (
@@ -31,6 +32,7 @@ func IterateShards(c *config.Config, required bool, f func(*shardconfig.Config)
 	c = c.Sub("shard")
 	def := c.Sub("default")
 
+	alive := 0
 	i := uint64(0)
 	for ; ; i++ {
 		si := strconv.FormatUint(i, 10)
@@ -48,11 +50,16 @@ func IterateShards(c *config.Config, required bool, f func(*shardconfig.Config)
 		}
 		(*config.Config)(sc).SetDefault(def)
 
+		if sc.Mode() == mode.Disabled {
+			continue
+		}
+
 		if err := f(sc); err != nil {
 			return err
 		}
+		alive++
 	}
-	if i == 0 && required {
+	if alive == 0 && required {
 		return ErrNoShardConfigured
 	}
 	return nil
diff --git a/cmd/neofs-node/config/engine/shard/config.go b/cmd/neofs-node/config/engine/shard/config.go
index ab1641ae236..610ebdf1ed9 100644
--- a/cmd/neofs-node/config/engine/shard/config.go
+++ b/cmd/neofs-node/config/engine/shard/config.go
@@ -128,6 +128,8 @@ func (x *Config) Mode() (m mode.Mode) {
 		m = mode.Degraded
 	case "degraded-read-only":
 		m = mode.DegradedReadOnly
+	case "disabled":
+		m = mode.Disabled
 	default:
 		panic(fmt.Sprintf("unknown shard mode: %s", s))
 	}
diff --git a/pkg/local_object_storage/shard/mode/mode.go b/pkg/local_object_storage/shard/mode/mode.go
index b06920d2e7c..65b2b5c8950 100644
--- a/pkg/local_object_storage/shard/mode/mode.go
+++ b/pkg/local_object_storage/shard/mode/mode.go
@@ -1,5 +1,7 @@
 package mode
 
+import "math"
+
 // Mode represents enumeration of Shard work modes.
 type Mode uint32
 
@@ -12,6 +14,11 @@ const (
 	// after a certain number of errors is encountered. It is the same as
 	// `mode.Degraded` but also is read-only.
 	DegradedReadOnly = Degraded | ReadOnly
+
+	// Disabled mode is a mode where a shard is disabled.
+	// An existing shard can't have this mode, but it can be used in
+	// the configuration or control service commands.
+	Disabled = math.MaxUint32
 )
 
 const (
@@ -36,6 +43,8 @@ func (m Mode) String() string {
 		return "DEGRADED_READ_WRITE"
 	case DegradedReadOnly:
 		return "DEGRADED_READ_ONLY"
+	case Disabled:
+		return "DISABLED"
 	}
 }
 

From 2ecee9f2ccbe9b29135bcf98149dfe1bc2595c2e Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@morphbits.ru>
Date: Wed, 5 Oct 2022 15:11:12 +0300
Subject: [PATCH 2/5] [#1840] blobstor: Return `Path` from components

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
---
 .../blobstor/blobovniczatree/blobovnicza.go                  | 5 +++++
 pkg/local_object_storage/blobstor/common/storage.go          | 1 +
 pkg/local_object_storage/blobstor/fstree/fstree.go           | 5 +++++
 3 files changed, 11 insertions(+)

diff --git a/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go b/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
index 0e7806d16be..e70ed06ae33 100644
--- a/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
+++ b/pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go
@@ -237,6 +237,11 @@ func (b *Blobovniczas) Type() string {
 	return Type
 }
 
+// Path implements common.Storage.
+func (b *Blobovniczas) Path() string {
+	return b.rootPath
+}
+
 // SetCompressor implements common.Storage.
 func (b *Blobovniczas) SetCompressor(cc *compression.Config) {
 	b.compression = cc
diff --git a/pkg/local_object_storage/blobstor/common/storage.go b/pkg/local_object_storage/blobstor/common/storage.go
index d6bea47a2de..85f8039a396 100644
--- a/pkg/local_object_storage/blobstor/common/storage.go
+++ b/pkg/local_object_storage/blobstor/common/storage.go
@@ -10,6 +10,7 @@ type Storage interface {
 	Close() error
 
 	Type() string
+	Path() string
 	SetCompressor(cc *compression.Config)
 
 	Get(GetPrm) (GetRes, error)
diff --git a/pkg/local_object_storage/blobstor/fstree/fstree.go b/pkg/local_object_storage/blobstor/fstree/fstree.go
index a2ab55c459d..601d772aecf 100644
--- a/pkg/local_object_storage/blobstor/fstree/fstree.go
+++ b/pkg/local_object_storage/blobstor/fstree/fstree.go
@@ -347,6 +347,11 @@ func (*FSTree) Type() string {
 	return Type
 }
 
+// Path implements common.Storage.
+func (t *FSTree) Path() string {
+	return t.RootPath
+}
+
 // SetCompressor implements common.Storage.
 func (t *FSTree) SetCompressor(cc *compression.Config) {
 	t.Config = cc

From 56321b8c6bca1671a5d2ff35a103d6c1b817a79f Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@morphbits.ru>
Date: Wed, 5 Oct 2022 15:18:01 +0300
Subject: [PATCH 3/5] [#1840] blobstor/test: Add tests for auxiliary functions

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
---
 .../blobstor/blobovniczatree/generic_test.go    | 17 ++++++++++++++---
 .../blobstor/fstree/generic_test.go             | 17 ++++++++++++++---
 .../blobstor/internal/blobstortest/common.go    |  6 ++++++
 3 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/pkg/local_object_storage/blobstor/blobovniczatree/generic_test.go b/pkg/local_object_storage/blobstor/blobovniczatree/generic_test.go
index b62c85774bd..5b60270ffc2 100644
--- a/pkg/local_object_storage/blobstor/blobovniczatree/generic_test.go
+++ b/pkg/local_object_storage/blobstor/blobovniczatree/generic_test.go
@@ -16,9 +16,7 @@ func TestGeneric(t *testing.T) {
 
 	defer func() { _ = os.RemoveAll(t.Name()) }()
 
-	var n int
-	newTree := func(t *testing.T) common.Storage {
-		dir := filepath.Join(t.Name(), strconv.Itoa(n))
+	helper := func(t *testing.T, dir string) common.Storage {
 		return NewBlobovniczaTree(
 			WithLogger(zaptest.NewLogger(t)),
 			WithObjectSizeLimit(maxObjectSize),
@@ -28,7 +26,20 @@ func TestGeneric(t *testing.T) {
 			WithBlobovniczaSize(1<<20))
 	}
 
+	var n int
+	newTree := func(t *testing.T) common.Storage {
+		dir := filepath.Join(t.Name(), strconv.Itoa(n))
+		return helper(t, dir)
+	}
+
 	blobstortest.TestAll(t, newTree, 1024, maxObjectSize)
+
+	t.Run("info", func(t *testing.T) {
+		dir := filepath.Join(t.Name(), "info")
+		blobstortest.TestInfo(t, func(t *testing.T) common.Storage {
+			return helper(t, dir)
+		}, Type, dir)
+	})
 }
 
 func TestControl(t *testing.T) {
diff --git a/pkg/local_object_storage/blobstor/fstree/generic_test.go b/pkg/local_object_storage/blobstor/fstree/generic_test.go
index 173611cc46d..eae12d2892a 100644
--- a/pkg/local_object_storage/blobstor/fstree/generic_test.go
+++ b/pkg/local_object_storage/blobstor/fstree/generic_test.go
@@ -13,16 +13,27 @@ import (
 func TestGeneric(t *testing.T) {
 	defer func() { _ = os.RemoveAll(t.Name()) }()
 
-	var n int
-	newTree := func(t *testing.T) common.Storage {
-		dir := filepath.Join(t.Name(), strconv.Itoa(n))
+	helper := func(t *testing.T, dir string) common.Storage {
 		return New(
 			WithPath(dir),
 			WithDepth(2),
 			WithDirNameLen(2))
 	}
 
+	var n int
+	newTree := func(t *testing.T) common.Storage {
+		dir := filepath.Join(t.Name(), strconv.Itoa(n))
+		return helper(t, dir)
+	}
+
 	blobstortest.TestAll(t, newTree, 2048, 16*1024)
+
+	t.Run("info", func(t *testing.T) {
+		dir := filepath.Join(t.Name(), "info")
+		blobstortest.TestInfo(t, func(t *testing.T) common.Storage {
+			return helper(t, dir)
+		}, Type, dir)
+	})
 }
 
 func TestControl(t *testing.T) {
diff --git a/pkg/local_object_storage/blobstor/internal/blobstortest/common.go b/pkg/local_object_storage/blobstor/internal/blobstortest/common.go
index 7e858d3b93b..0d3a79e8e05 100644
--- a/pkg/local_object_storage/blobstor/internal/blobstortest/common.go
+++ b/pkg/local_object_storage/blobstor/internal/blobstortest/common.go
@@ -43,6 +43,12 @@ func TestAll(t *testing.T, cons Constructor, min, max uint64) {
 	})
 }
 
+func TestInfo(t *testing.T, cons Constructor, expectedType string, expectedPath string) {
+	s := cons(t)
+	require.Equal(t, expectedType, s.Type())
+	require.Equal(t, expectedPath, s.Path())
+}
+
 func prepare(t *testing.T, count int, s common.Storage, min, max uint64) []objectDesc {
 	objects := make([]objectDesc, count)
 

From 5e20a5b4e277089a5f18de46b76416f46c474239 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@morphbits.ru>
Date: Wed, 5 Oct 2022 15:41:36 +0300
Subject: [PATCH 4/5] [#1840] blobstor: Return info about all components

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
---
 cmd/neofs-cli/modules/control/shards_list.go  |  12 +-
 pkg/local_object_storage/blobstor/blobstor.go |  12 +-
 pkg/local_object_storage/blobstor/info.go     |  15 +-
 pkg/local_object_storage/engine/error_test.go |   4 +-
 .../shard/control_test.go                     |  16 +-
 pkg/services/control/server/list_shards.go    |  14 +-
 pkg/services/control/service_test.go          |  19 +-
 pkg/services/control/types.go                 |   5 -
 pkg/services/control/types.pb.go              | 181 +++++++++++++-----
 pkg/services/control/types.proto              |  12 +-
 pkg/services/control/types_neofs.pb.go        |  38 +++-
 pkg/services/control/types_test.go            |   6 +-
 12 files changed, 246 insertions(+), 88 deletions(-)

diff --git a/cmd/neofs-cli/modules/control/shards_list.go b/cmd/neofs-cli/modules/control/shards_list.go
index 4d4eef63a7a..879b712b018 100644
--- a/cmd/neofs-cli/modules/control/shards_list.go
+++ b/cmd/neofs-cli/modules/control/shards_list.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"strings"
 
 	"github.com/mr-tron/base58"
 	rawclient "github.com/nspcc-dev/neofs-api-go/v2/rpc/client"
@@ -65,7 +66,7 @@ func prettyPrintShardsJSON(cmd *cobra.Command, ii []*control.ShardInfo) {
 			"shard_id":    base58.Encode(i.Shard_ID),
 			"mode":        shardModeToString(i.GetMode()),
 			"metabase":    i.GetMetabasePath(),
-			"blobstor":    i.GetBlobstorPath(),
+			"blobstor":    i.GetBlobstor(),
 			"writecache":  i.GetWritecachePath(),
 			"error_count": i.GetErrorCount(),
 		})
@@ -89,9 +90,16 @@ func prettyPrintShards(cmd *cobra.Command, ii []*control.ShardInfo) {
 			return fmt.Sprintf("%s: %s\n", name, path)
 		}
 
+		var sb strings.Builder
+		sb.WriteString("Blobstor:\n")
+		for j, info := range i.GetBlobstor() {
+			sb.WriteString(fmt.Sprintf("\tPath %d: %s\n\tType %d: %s\n",
+				j, info.GetPath(), j, info.GetType()))
+		}
+
 		cmd.Printf("Shard %s:\nMode: %s\n"+
 			pathPrinter("Metabase", i.GetMetabasePath())+
-			pathPrinter("Blobstor", i.GetBlobstorPath())+
+			sb.String()+
 			pathPrinter("Write-cache", i.GetWritecachePath())+
 			pathPrinter("Pilorama", i.GetPiloramaPath())+
 			fmt.Sprintf("Error count: %d\n", i.GetErrorCount()),
diff --git a/pkg/local_object_storage/blobstor/blobstor.go b/pkg/local_object_storage/blobstor/blobstor.go
index 4d8bd94f93c..0480db0d297 100644
--- a/pkg/local_object_storage/blobstor/blobstor.go
+++ b/pkg/local_object_storage/blobstor/blobstor.go
@@ -5,7 +5,6 @@ import (
 
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/compression"
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
@@ -26,7 +25,16 @@ type BlobStor struct {
 	mode    mode.Mode
 }
 
-type Info = fstree.Info
+// Info contains information about blobstor.
+type Info struct {
+	SubStorages []SubStorageInfo
+}
+
+// SubStorageInfo contains information about blobstor storage component.
+type SubStorageInfo struct {
+	Type string
+	Path string
+}
 
 // Option represents BlobStor's constructor option.
 type Option func(*cfg)
diff --git a/pkg/local_object_storage/blobstor/info.go b/pkg/local_object_storage/blobstor/info.go
index 60a143ce18b..e3e790ebc8a 100644
--- a/pkg/local_object_storage/blobstor/info.go
+++ b/pkg/local_object_storage/blobstor/info.go
@@ -1,13 +1,14 @@
 package blobstor
 
-import "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
-
 // DumpInfo returns information about blob stor.
-func (b *BlobStor) DumpInfo() fstree.Info {
+func (b *BlobStor) DumpInfo() Info {
+	sub := make([]SubStorageInfo, len(b.storage))
 	for i := range b.storage {
-		if b.storage[i].Storage.Type() == "fstree" {
-			return b.storage[i].Storage.(*fstree.FSTree).Info
-		}
+		sub[i].Path = b.storage[i].Storage.Path()
+		sub[i].Type = b.storage[i].Storage.Type()
+	}
+
+	return Info{
+		SubStorages: sub,
 	}
-	return fstree.Info{}
 }
diff --git a/pkg/local_object_storage/engine/error_test.go b/pkg/local_object_storage/engine/error_test.go
index 2439d667b94..ccbe8c04ef3 100644
--- a/pkg/local_object_storage/engine/error_test.go
+++ b/pkg/local_object_storage/engine/error_test.go
@@ -167,8 +167,8 @@ func TestBlobstorFailback(t *testing.T) {
 	checkShardState(t, e, id[0], 0, mode.ReadWrite)
 	require.NoError(t, e.Close())
 
-	p1 := e.shards[id[0].String()].Shard.DumpInfo().BlobStorInfo.RootPath
-	p2 := e.shards[id[1].String()].Shard.DumpInfo().BlobStorInfo.RootPath
+	p1 := e.shards[id[0].String()].Shard.DumpInfo().BlobStorInfo.SubStorages[1].Path
+	p2 := e.shards[id[1].String()].Shard.DumpInfo().BlobStorInfo.SubStorages[1].Path
 	tmp := filepath.Join(dir, "tmp")
 	require.NoError(t, os.Rename(p1, tmp))
 	require.NoError(t, os.Rename(p2, p1))
diff --git a/pkg/local_object_storage/shard/control_test.go b/pkg/local_object_storage/shard/control_test.go
index 01aa3f67f5f..eb9d2a3ff31 100644
--- a/pkg/local_object_storage/shard/control_test.go
+++ b/pkg/local_object_storage/shard/control_test.go
@@ -82,13 +82,14 @@ func TestShardOpen(t *testing.T) {
 func TestRefillMetabaseCorrupted(t *testing.T) {
 	dir := t.TempDir()
 
+	fsTree := fstree.New(
+		fstree.WithDirNameLen(2),
+		fstree.WithPath(filepath.Join(dir, "blob")),
+		fstree.WithDepth(1))
 	blobOpts := []blobstor.Option{
 		blobstor.WithStorages([]blobstor.SubStorage{
 			{
-				Storage: fstree.New(
-					fstree.WithDirNameLen(2),
-					fstree.WithPath(filepath.Join(dir, "blob")),
-					fstree.WithDepth(1)),
+				Storage: fsTree,
 			},
 		}),
 	}
@@ -111,12 +112,7 @@ func TestRefillMetabaseCorrupted(t *testing.T) {
 	require.NoError(t, sh.Close())
 
 	addr := object.AddressOf(obj)
-	fs := fstree.FSTree{
-		DirNameLen: 2,
-		Depth:      1,
-		Info:       sh.blobStor.DumpInfo(),
-	}
-	_, err = fs.Put(common.PutPrm{Address: addr, RawData: []byte("not an object")})
+	_, err = fsTree.Put(common.PutPrm{Address: addr, RawData: []byte("not an object")})
 	require.NoError(t, err)
 
 	sh = New(
diff --git a/pkg/services/control/server/list_shards.go b/pkg/services/control/server/list_shards.go
index 11a66dcd5db..0e21d90282b 100644
--- a/pkg/services/control/server/list_shards.go
+++ b/pkg/services/control/server/list_shards.go
@@ -3,6 +3,7 @@ package control
 import (
 	"context"
 
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
 	"github.com/nspcc-dev/neofs-node/pkg/services/control"
 	"google.golang.org/grpc/codes"
@@ -30,7 +31,7 @@ func (s *Server) ListShards(_ context.Context, req *control.ListShardsRequest) (
 
 		si.SetID(*sh.ID)
 		si.SetMetabasePath(sh.MetaBaseInfo.Path)
-		si.SetBlobstorPath(sh.BlobStorInfo.RootPath)
+		si.Blobstor = blobstorInfoToProto(sh.BlobStorInfo)
 		si.SetWriteCachePath(sh.WriteCacheInfo.Path)
 		si.SetPiloramaPath(sh.PiloramaInfo.Path)
 
@@ -64,3 +65,14 @@ func (s *Server) ListShards(_ context.Context, req *control.ListShardsRequest) (
 
 	return resp, nil
 }
+
+func blobstorInfoToProto(info blobstor.Info) []*control.BlobstorInfo {
+	res := make([]*control.BlobstorInfo, len(info.SubStorages))
+	for i := range info.SubStorages {
+		res[i] = &control.BlobstorInfo{
+			Path: info.SubStorages[i].Path,
+			Type: info.SubStorages[i].Type,
+		}
+	}
+	return res
+}
diff --git a/pkg/services/control/service_test.go b/pkg/services/control/service_test.go
index b64e67d7b72..8c5f3279ce1 100644
--- a/pkg/services/control/service_test.go
+++ b/pkg/services/control/service_test.go
@@ -77,18 +77,21 @@ func equalListShardResponseBodies(b1, b2 *control.ListShardsResponse_Body) bool
 
 	for i := range b1.Shards {
 		if b1.Shards[i].GetMetabasePath() != b2.Shards[i].GetMetabasePath() ||
-			b1.Shards[i].GetBlobstorPath() != b2.Shards[i].GetBlobstorPath() ||
 			b1.Shards[i].GetWritecachePath() != b2.Shards[i].GetWritecachePath() ||
 			b1.Shards[i].GetPiloramaPath() != b2.Shards[i].GetPiloramaPath() ||
 			!bytes.Equal(b1.Shards[i].GetShard_ID(), b2.Shards[i].GetShard_ID()) {
 			return false
 		}
+
+		info1 := b1.Shards[i].GetBlobstor()
+		info2 := b2.Shards[i].GetBlobstor()
+		return compareBlobstorInfo(info1, info2)
 	}
 
 	for i := range b1.Shards {
 		for j := i + 1; j < len(b1.Shards); j++ {
 			if b1.Shards[i].GetMetabasePath() == b2.Shards[j].GetMetabasePath() ||
-				b1.Shards[i].GetBlobstorPath() == b2.Shards[j].GetBlobstorPath() ||
+				!compareBlobstorInfo(b1.Shards[i].Blobstor, b2.Shards[i].Blobstor) ||
 				b1.Shards[i].GetWritecachePath() == b2.Shards[j].GetWritecachePath() ||
 				bytes.Equal(b1.Shards[i].GetShard_ID(), b2.Shards[j].GetShard_ID()) {
 				return false
@@ -98,6 +101,18 @@ func equalListShardResponseBodies(b1, b2 *control.ListShardsResponse_Body) bool
 
 	return true
 }
+func compareBlobstorInfo(a, b []*control.BlobstorInfo) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if a[i].Type != b[i].Type ||
+			a[i].Path != b[i].Path {
+			return false
+		}
+	}
+	return true
+}
 
 func generateListShardsResponseBody() *control.ListShardsResponse_Body {
 	body := new(control.ListShardsResponse_Body)
diff --git a/pkg/services/control/types.go b/pkg/services/control/types.go
index 406a1896af3..13bd87ed56b 100644
--- a/pkg/services/control/types.go
+++ b/pkg/services/control/types.go
@@ -97,11 +97,6 @@ func (x *ShardInfo) SetMetabasePath(v string) {
 	x.MetabasePath = v
 }
 
-// SetBlobstorPath sets path to shard's blobstor.
-func (x *ShardInfo) SetBlobstorPath(v string) {
-	x.BlobstorPath = v
-}
-
 // SetWriteCachePath sets path to shard's write-cache.
 func (x *ShardInfo) SetWriteCachePath(v string) {
 	x.WritecachePath = v
diff --git a/pkg/services/control/types.pb.go b/pkg/services/control/types.pb.go
index 7056a225f38..0f40deb509f 100644
--- a/pkg/services/control/types.pb.go
+++ b/pkg/services/control/types.pb.go
@@ -400,8 +400,8 @@ type ShardInfo struct {
 	Shard_ID []byte `protobuf:"bytes,1,opt,name=shard_ID,json=shardID,proto3" json:"shard_ID,omitempty"`
 	// Path to shard's metabase.
 	MetabasePath string `protobuf:"bytes,2,opt,name=metabase_path,json=metabasePath,proto3" json:"metabase_path,omitempty"`
-	// Path to shard's blobstor.
-	BlobstorPath string `protobuf:"bytes,3,opt,name=blobstor_path,json=blobstorPath,proto3" json:"blobstor_path,omitempty"`
+	// Shard's blobstor info.
+	Blobstor []*BlobstorInfo `protobuf:"bytes,3,rep,name=blobstor,proto3" json:"blobstor,omitempty"`
 	// Path to shard's write-cache, empty if disabled.
 	WritecachePath string `protobuf:"bytes,4,opt,name=writecache_path,json=writecachePath,proto3" json:"writecache_path,omitempty"`
 	// Work mode of the shard.
@@ -458,11 +458,11 @@ func (x *ShardInfo) GetMetabasePath() string {
 	return ""
 }
 
-func (x *ShardInfo) GetBlobstorPath() string {
+func (x *ShardInfo) GetBlobstor() []*BlobstorInfo {
 	if x != nil {
-		return x.BlobstorPath
+		return x.Blobstor
 	}
-	return ""
+	return nil
 }
 
 func (x *ShardInfo) GetWritecachePath() string {
@@ -493,6 +493,64 @@ func (x *ShardInfo) GetPiloramaPath() string {
 	return ""
 }
 
+// Blobstor component description.
+type BlobstorInfo struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Path to the root.
+	Path string `protobuf:"bytes,1,opt,name=path,proto3" json:"path,omitempty"`
+	// Component type.
+	Type string `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
+}
+
+func (x *BlobstorInfo) Reset() {
+	*x = BlobstorInfo{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_pkg_services_control_types_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BlobstorInfo) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BlobstorInfo) ProtoMessage() {}
+
+func (x *BlobstorInfo) ProtoReflect() protoreflect.Message {
+	mi := &file_pkg_services_control_types_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BlobstorInfo.ProtoReflect.Descriptor instead.
+func (*BlobstorInfo) Descriptor() ([]byte, []int) {
+	return file_pkg_services_control_types_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *BlobstorInfo) GetPath() string {
+	if x != nil {
+		return x.Path
+	}
+	return ""
+}
+
+func (x *BlobstorInfo) GetType() string {
+	if x != nil {
+		return x.Type
+	}
+	return ""
+}
+
 // Administrator-defined Attributes of the NeoFS Storage Node.
 //
 // `Attribute` is a Key-Value metadata pair. Key name must be a valid UTF-8
@@ -549,7 +607,7 @@ type NodeInfo_Attribute struct {
 func (x *NodeInfo_Attribute) Reset() {
 	*x = NodeInfo_Attribute{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_services_control_types_proto_msgTypes[4]
+		mi := &file_pkg_services_control_types_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -562,7 +620,7 @@ func (x *NodeInfo_Attribute) String() string {
 func (*NodeInfo_Attribute) ProtoMessage() {}
 
 func (x *NodeInfo_Attribute) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_services_control_types_proto_msgTypes[4]
+	mi := &file_pkg_services_control_types_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -629,44 +687,49 @@ var file_pkg_services_control_types_proto_rawDesc = []byte{
 	0x05, 0x65, 0x70, 0x6f, 0x63, 0x68, 0x12, 0x27, 0x0a, 0x05, 0x6e, 0x6f, 0x64, 0x65, 0x73, 0x18,
 	0x02, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x11, 0x2e, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x2e,
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+	0x74, 0x6f, 0x33,
 }
 
 var (
@@ -682,7 +745,7 @@ func file_pkg_services_control_types_proto_rawDescGZIP() []byte {
 }
 
 var file_pkg_services_control_types_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_pkg_services_control_types_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_pkg_services_control_types_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
 var file_pkg_services_control_types_proto_goTypes = []interface{}{
 	(NetmapStatus)(0),          // 0: control.NetmapStatus
 	(HealthStatus)(0),          // 1: control.HealthStatus
@@ -691,18 +754,20 @@ var file_pkg_services_control_types_proto_goTypes = []interface{}{
 	(*NodeInfo)(nil),           // 4: control.NodeInfo
 	(*Netmap)(nil),             // 5: control.Netmap
 	(*ShardInfo)(nil),          // 6: control.ShardInfo
-	(*NodeInfo_Attribute)(nil), // 7: control.NodeInfo.Attribute
+	(*BlobstorInfo)(nil),       // 7: control.BlobstorInfo
+	(*NodeInfo_Attribute)(nil), // 8: control.NodeInfo.Attribute
 }
 var file_pkg_services_control_types_proto_depIdxs = []int32{
-	7, // 0: control.NodeInfo.attributes:type_name -> control.NodeInfo.Attribute
+	8, // 0: control.NodeInfo.attributes:type_name -> control.NodeInfo.Attribute
 	0, // 1: control.NodeInfo.state:type_name -> control.NetmapStatus
 	4, // 2: control.Netmap.nodes:type_name -> control.NodeInfo
-	2, // 3: control.ShardInfo.mode:type_name -> control.ShardMode
-	4, // [4:4] is the sub-list for method output_type
-	4, // [4:4] is the sub-list for method input_type
-	4, // [4:4] is the sub-list for extension type_name
-	4, // [4:4] is the sub-list for extension extendee
-	0, // [0:4] is the sub-list for field type_name
+	7, // 3: control.ShardInfo.blobstor:type_name -> control.BlobstorInfo
+	2, // 4: control.ShardInfo.mode:type_name -> control.ShardMode
+	5, // [5:5] is the sub-list for method output_type
+	5, // [5:5] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
 }
 
 func init() { file_pkg_services_control_types_proto_init() }
@@ -760,6 +825,18 @@ func file_pkg_services_control_types_proto_init() {
 			}
 		}
 		file_pkg_services_control_types_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BlobstorInfo); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_pkg_services_control_types_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*NodeInfo_Attribute); i {
 			case 0:
 				return &v.state
@@ -778,7 +855,7 @@ func file_pkg_services_control_types_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_pkg_services_control_types_proto_rawDesc,
 			NumEnums:      3,
-			NumMessages:   5,
+			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/pkg/services/control/types.proto b/pkg/services/control/types.proto
index 0729e4ebb88..1994e24489f 100644
--- a/pkg/services/control/types.proto
+++ b/pkg/services/control/types.proto
@@ -128,8 +128,8 @@ message ShardInfo {
     // Path to shard's metabase.
     string metabase_path = 2 [json_name = "metabasePath"];
 
-    // Path to shard's blobstor.
-    string blobstor_path = 3 [json_name = "blobstorPath"];
+    // Shard's blobstor info.
+    repeated BlobstorInfo blobstor = 3 [json_name = "blobstor"];
 
     // Path to shard's write-cache, empty if disabled.
     string writecache_path = 4 [json_name = "writecachePath"];
@@ -144,6 +144,14 @@ message ShardInfo {
     string pilorama_path = 7 [json_name = "piloramaPath"];
 }
 
+// Blobstor component description.
+message BlobstorInfo {
+    // Path to the root.
+    string path = 1 [json_name = "path"];
+    // Component type.
+    string type = 2 [json_name = "type"];
+}
+
 // Work mode of the shard.
 enum ShardMode {
     // Undefined mode, default value.
diff --git a/pkg/services/control/types_neofs.pb.go b/pkg/services/control/types_neofs.pb.go
index 8dd46362eb5..148f1869c10 100644
--- a/pkg/services/control/types_neofs.pb.go
+++ b/pkg/services/control/types_neofs.pb.go
@@ -144,7 +144,9 @@ func (x *Netmap) StableMarshal(buf []byte) []byte {
 func (x *ShardInfo) StableSize() (size int) {
 	size += proto.BytesSize(1, x.Shard_ID)
 	size += proto.StringSize(2, x.MetabasePath)
-	size += proto.StringSize(3, x.BlobstorPath)
+	for i := range x.Blobstor {
+		size += proto.NestedStructureSize(3, x.Blobstor[i])
+	}
 	size += proto.StringSize(4, x.WritecachePath)
 	size += proto.EnumSize(5, int32(x.Mode))
 	size += proto.UInt32Size(6, x.ErrorCount)
@@ -170,10 +172,42 @@ func (x *ShardInfo) StableMarshal(buf []byte) []byte {
 	var offset int
 	offset += proto.BytesMarshal(1, buf[offset:], x.Shard_ID)
 	offset += proto.StringMarshal(2, buf[offset:], x.MetabasePath)
-	offset += proto.StringMarshal(3, buf[offset:], x.BlobstorPath)
+	for i := range x.Blobstor {
+		offset += proto.NestedStructureMarshal(3, buf[offset:], x.Blobstor[i])
+	}
 	offset += proto.StringMarshal(4, buf[offset:], x.WritecachePath)
 	offset += proto.EnumMarshal(5, buf[offset:], int32(x.Mode))
 	offset += proto.UInt32Marshal(6, buf[offset:], x.ErrorCount)
 	offset += proto.StringMarshal(7, buf[offset:], x.PiloramaPath)
 	return buf
 }
+
+// StableSize returns the size of x in protobuf format.
+//
+// Structures with the same field values have the same binary size.
+func (x *BlobstorInfo) StableSize() (size int) {
+	size += proto.StringSize(1, x.Path)
+	size += proto.StringSize(2, x.Type)
+	return size
+}
+
+// StableMarshal marshals x in protobuf binary format with stable field order.
+//
+// If buffer length is less than x.StableSize(), new buffer is allocated.
+//
+// Returns any error encountered which did not allow writing the data completely.
+// Otherwise, returns the buffer in which the data is written.
+//
+// Structures with the same field values have the same binary format.
+func (x *BlobstorInfo) StableMarshal(buf []byte) []byte {
+	if x == nil {
+		return []byte{}
+	}
+	if buf == nil {
+		buf = make([]byte, x.StableSize())
+	}
+	var offset int
+	offset += proto.StringMarshal(1, buf[offset:], x.Path)
+	offset += proto.StringMarshal(2, buf[offset:], x.Type)
+	return buf
+}
diff --git a/pkg/services/control/types_test.go b/pkg/services/control/types_test.go
index 40a0d17a90f..79b6da8e638 100644
--- a/pkg/services/control/types_test.go
+++ b/pkg/services/control/types_test.go
@@ -7,6 +7,8 @@ import (
 	"testing"
 
 	"github.com/google/uuid"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/blobovniczatree"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree"
 	"github.com/nspcc-dev/neofs-node/pkg/services/control"
 )
 
@@ -138,7 +140,9 @@ func generateShardInfo(id int) *control.ShardInfo {
 	si.SetID(bin)
 	si.SetMode(control.ShardMode_READ_WRITE)
 	si.SetMetabasePath(filepath.Join(path, "meta"))
-	si.SetBlobstorPath(filepath.Join(path, "blobstor"))
+	si.Blobstor = []*control.BlobstorInfo{
+		{Type: fstree.Type, Path: filepath.Join(path, "fstree")},
+		{Type: blobovniczatree.Type, Path: filepath.Join(path, "blobtree")}}
 	si.SetWriteCachePath(filepath.Join(path, "writecache"))
 	si.SetPiloramaPath(filepath.Join(path, "pilorama"))
 

From 96f35f79194db74d27881528de8c26f5a8baaab0 Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@morphbits.ru>
Date: Wed, 5 Oct 2022 15:53:42 +0300
Subject: [PATCH 5/5] [#1840] neofs-node: Use blobstor paths to identify shard

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
---
 cmd/neofs-node/config.go                      | 30 +++++++++++----
 pkg/local_object_storage/engine/control.go    | 38 +++++++++++++------
 .../engine/control_test.go                    |  9 ++---
 3 files changed, 52 insertions(+), 25 deletions(-)

diff --git a/cmd/neofs-node/config.go b/cmd/neofs-node/config.go
index e2effd6a529..99d96d6751c 100644
--- a/cmd/neofs-node/config.go
+++ b/cmd/neofs-node/config.go
@@ -8,6 +8,8 @@ import (
 	"net"
 	"os"
 	"os/signal"
+	"path/filepath"
+	"strings"
 	"sync"
 	atomicstd "sync/atomic"
 	"syscall"
@@ -135,6 +137,18 @@ type shardCfg struct {
 	}
 }
 
+// id returns persistent id of a shard. It is different from the ID used in runtime
+// and is primarily used to identify shards in the configuration.
+func (c *shardCfg) id() string {
+	// This calculation should be kept in sync with
+	// pkg/local_object_storage/engine/control.go file.
+	var sb strings.Builder
+	for i := range c.subStorages {
+		sb.WriteString(filepath.Clean(c.subStorages[i].path))
+	}
+	return sb.String()
+}
+
 type subStorageCfg struct {
 	// common for all storages
 	typ   string
@@ -597,13 +611,13 @@ func (c *cfg) engineOpts() []engine.Option {
 	return opts
 }
 
-type shardOptsWithMetaPath struct {
-	metaPath string
+type shardOptsWithID struct {
+	configID string
 	shOpts   []shard.Option
 }
 
-func (c *cfg) shardOpts() []shardOptsWithMetaPath {
-	shards := make([]shardOptsWithMetaPath, 0, len(c.EngineCfg.shards))
+func (c *cfg) shardOpts() []shardOptsWithID {
+	shards := make([]shardOptsWithID, 0, len(c.EngineCfg.shards))
 
 	for _, shCfg := range c.EngineCfg.shards {
 		var writeCacheOpts []writecache.Option
@@ -666,8 +680,8 @@ func (c *cfg) shardOpts() []shardOptsWithMetaPath {
 			}
 		}
 
-		var sh shardOptsWithMetaPath
-		sh.metaPath = shCfg.metaCfg.path
+		var sh shardOptsWithID
+		sh.configID = shCfg.id()
 		sh.shOpts = []shard.Option{
 			shard.WithLogger(c.log),
 			shard.WithRefillMetabase(shCfg.refillMetabase),
@@ -834,8 +848,8 @@ func (c *cfg) configWatcher(ctx context.Context) {
 			}
 
 			var rcfg engine.ReConfiguration
-			for _, optsWithMeta := range c.shardOpts() {
-				rcfg.AddShard(optsWithMeta.metaPath, optsWithMeta.shOpts)
+			for _, optsWithID := range c.shardOpts() {
+				rcfg.AddShard(optsWithID.configID, optsWithID.shOpts)
 			}
 
 			err = c.cfgObject.cfgLocalStorage.localStorage.Reload(rcfg)
diff --git a/pkg/local_object_storage/engine/control.go b/pkg/local_object_storage/engine/control.go
index e1f632d8243..216267cb9e0 100644
--- a/pkg/local_object_storage/engine/control.go
+++ b/pkg/local_object_storage/engine/control.go
@@ -3,6 +3,8 @@ package engine
 import (
 	"errors"
 	"fmt"
+	"path/filepath"
+	"strings"
 	"sync"
 
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
@@ -217,18 +219,18 @@ func (rCfg *ReConfiguration) SetShardPoolSize(shardPoolSize uint32) {
 	rCfg.shardPoolSize = shardPoolSize
 }
 
-// AddShard adds a shard for the reconfiguration. Path to a metabase is used as
-// an identifier of the shard in configuration.
-func (rCfg *ReConfiguration) AddShard(metaPath string, opts []shard.Option) {
+// AddShard adds a shard for the reconfiguration.
+// Shard identifier is calculated from paths used in blobstor.
+func (rCfg *ReConfiguration) AddShard(id string, opts []shard.Option) {
 	if rCfg.shards == nil {
 		rCfg.shards = make(map[string][]shard.Option)
 	}
 
-	if _, found := rCfg.shards[metaPath]; found {
+	if _, found := rCfg.shards[id]; found {
 		return
 	}
 
-	rCfg.shards[metaPath] = opts
+	rCfg.shards[id] = opts
 }
 
 // Reload reloads StorageEngine's configuration in runtime.
@@ -240,24 +242,26 @@ func (e *StorageEngine) Reload(rcfg ReConfiguration) error {
 
 	// mark removed shards for removal
 	for id, sh := range e.shards {
-		_, ok := rcfg.shards[sh.Shard.DumpInfo().MetaBaseInfo.Path]
+		_, ok := rcfg.shards[calculateShardID(sh.DumpInfo())]
 		if !ok {
 			shardsToRemove = append(shardsToRemove, id)
 		}
 	}
 
 	// mark new shards for addition
-	for newPath := range rcfg.shards {
+	for newID := range rcfg.shards {
 		addShard := true
 		for _, sh := range e.shards {
-			if newPath == sh.Shard.DumpInfo().MetaBaseInfo.Path {
+			// This calculation should be kept in sync with node
+			// configuration parsing during SIGHUP.
+			if newID == calculateShardID(sh.DumpInfo()) {
 				addShard = false
 				break
 			}
 		}
 
 		if addShard {
-			shardsToAdd = append(shardsToAdd, newPath)
+			shardsToAdd = append(shardsToAdd, newID)
 		}
 	}
 
@@ -265,10 +269,10 @@ func (e *StorageEngine) Reload(rcfg ReConfiguration) error {
 
 	e.removeShards(shardsToRemove...)
 
-	for _, newPath := range shardsToAdd {
-		sh, err := e.createShard(rcfg.shards[newPath])
+	for _, newID := range shardsToAdd {
+		sh, err := e.createShard(rcfg.shards[newID])
 		if err != nil {
-			return fmt.Errorf("could not add new shard with '%s' metabase path: %w", newPath, err)
+			return fmt.Errorf("could not add new shard with '%s' metabase path: %w", newID, err)
 		}
 
 		idStr := sh.ID().String()
@@ -293,3 +297,13 @@ func (e *StorageEngine) Reload(rcfg ReConfiguration) error {
 
 	return nil
 }
+
+func calculateShardID(info shard.Info) string {
+	// This calculation should be kept in sync with node
+	// configuration parsing during SIGHUP.
+	var sb strings.Builder
+	for _, sub := range info.BlobStorInfo.SubStorages {
+		sb.WriteString(filepath.Clean(sub.Path))
+	}
+	return sb.String()
+}
diff --git a/pkg/local_object_storage/engine/control_test.go b/pkg/local_object_storage/engine/control_test.go
index 59750424b19..1d2dee6c031 100644
--- a/pkg/local_object_storage/engine/control_test.go
+++ b/pkg/local_object_storage/engine/control_test.go
@@ -147,19 +147,18 @@ func engineWithShards(t *testing.T, path string, num int) (*StorageEngine, []str
 
 	e := New()
 	for i := 0; i < num; i++ {
-		metaPath := filepath.Join(addPath, fmt.Sprintf("%d.metabase", i))
-		currShards = append(currShards, metaPath)
-
-		_, err := e.AddShard(
+		id, err := e.AddShard(
 			shard.WithBlobStorOptions(
 				blobstor.WithStorages(newStorages(filepath.Join(addPath, strconv.Itoa(i)), errSmallSize))),
 			shard.WithMetaBaseOptions(
-				meta.WithPath(metaPath),
+				meta.WithPath(filepath.Join(addPath, fmt.Sprintf("%d.metabase", i))),
 				meta.WithPermissions(0700),
 				meta.WithEpochState(epochState{}),
 			),
 		)
 		require.NoError(t, err)
+
+		currShards = append(currShards, calculateShardID(e.shards[id.String()].DumpInfo()))
 	}
 
 	require.Equal(t, num, len(e.shards))