[#1329] tree: Sync trees when a node first time appears in a container

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-node/config.go

@@ -305,10 +305,6 @@ type internals struct {
 	workers []worker
 	closers []func()
 
-	// onlineStateHandlers are executed in a separate
-	// goroutine on every !ONLINE -> ONLINE state transition
-	onlineStateHandlers []func(context.Context)
-
 	apiVersion   version.Version
 	healthStatus *atomic.Int32
 	// is node under maintenance
@@ -837,13 +833,6 @@ func (c *cfg) LocalNodeInfo() (*netmapV2.NodeInfo, error) {
 // Called with nil when storage node is outside the NeoFS network map
 // (before entering the network and after leaving it).
 func (c *cfg) handleLocalNodeInfo(ni *netmap.NodeInfo) {
-	if c.cfgNetmap.state.controlNetmapStatus() != control.NetmapStatus_ONLINE &&
-		ni != nil && ni.IsOnline() {
-		for _, h := range c.onlineStateHandlers {
-			go h(c.ctx)
-		}
-	}
-
 	c.cfgNetmap.state.setNodeInfo(ni)
 }
 
@@ -950,7 +939,3 @@ func (c *cfg) configWatcher(ctx context.Context) {
 		}
 	}
 }
-
-func (c *cfg) addOnlineStateHandler(h func(ctx context.Context)) {
-	c.onlineStateHandlers = append(c.onlineStateHandlers, h)
-}

cmd/neofs-node/tree.go

@@ -5,16 +5,34 @@ import (
 	"errors"
 
 	treeconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/tree"
+	"github.com/nspcc-dev/neofs-node/pkg/core/container"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
 	containerClient "github.com/nspcc-dev/neofs-node/pkg/morph/client/container"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
 	containerEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/container"
-	"github.com/nspcc-dev/neofs-node/pkg/services/control"
 	"github.com/nspcc-dev/neofs-node/pkg/services/tree"
-	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
+	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	"go.uber.org/zap"
 )
 
+type cnrSource struct {
+	// cache of raw client.
+	src container.Source
+	// raw client; no need to cache request results
+	// since sync is performed once in epoch and is
+	// expected to receive different results every
+	// call.
+	cli *containerClient.Client
+}
+
+func (c cnrSource) Get(id cid.ID) (*container.Container, error) {
+	return c.src.Get(id)
+}
+
+func (c cnrSource) List() ([]cid.ID, error) {
+	return c.cli.List(nil)
+}
+
 func initTreeService(c *cfg) {
 	treeConfig := treeconfig.Tree(c.appCfg)
 	if !treeConfig.Enabled() {
@@ -23,7 +41,10 @@ func initTreeService(c *cfg) {
 	}
 
 	c.treeService = tree.New(
-		tree.WithContainerSource(c.cfgObject.cnrSource),
+		tree.WithContainerSource(cnrSource{
+			src: c.cfgObject.cnrSource,
+			cli: c.shared.cnrClient,
+		}),
 		tree.WithEACLSource(c.cfgObject.eaclSource),
 		tree.WithNetmapSource(c.netMapSource),
 		tree.WithPrivateKey(&c.key.PrivateKey),
@@ -41,15 +62,12 @@ func initTreeService(c *cfg) {
 		c.treeService.Start(ctx)
 	}))
 
-	syncTreeFunc := func(ctx context.Context) {
-		syncTrees(ctx, c.treeService, c.shared.cnrClient, c.log)
-	}
-
-	if c.cfgNetmap.state.controlNetmapStatus() == control.NetmapStatus_ONLINE {
-		c.workers = append(c.workers, newWorkerFromFunc(syncTreeFunc))
-	}
-
-	c.addOnlineStateHandler(syncTreeFunc)
+	addNewEpochNotificationHandler(c, func(_ event.Event) {
+		err := c.treeService.SynchronizeAll()
+		if err != nil {
+			c.log.Error("could not synchronize Tree Service", zap.Error(err))
+		}
+	})
 
 	subscribeToContainerRemoval(c, func(e event.Event) {
 		ev := e.(containerEvent.DeleteSuccess)
@@ -66,26 +84,3 @@ func initTreeService(c *cfg) {
 
 	c.onShutdown(c.treeService.Shutdown)
 }
-
-func syncTrees(ctx context.Context, treeSvc *tree.Service, cnrCli *containerClient.Client, log *logger.Logger) {
-	log.Info("synchronizing trees...")
-
-	ids, err := cnrCli.List(nil)
-	if err != nil {
-		log.Error("trees are not synchronized", zap.Error(err))
-		return
-	}
-
-	for _, id := range ids {
-		err = treeSvc.SynchronizeAllTrees(ctx, id)
-		if err != nil && !errors.Is(err, tree.ErrNotInContainer) {
-			log.Warn(
-				"tree synchronization failed",
-				zap.Stringer("cid", id),
-				zap.Error(err),
-			)
-		}
-	}
-
-	log.Info("trees have been synchronized")
-}

pkg/services/tree/options.go

@@ -8,14 +8,23 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/pilorama"
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
+	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 )
 
+type ContainerSource interface {
+	container.Source
+	// List must return list of all the containers in the NeoFS network
+	// at the moment of a call and any error that does not allow fetching
+	// container information.
+	List() ([]cid.ID, error)
+}
+
 type cfg struct {
 	log        *logger.Logger
 	key        *ecdsa.PrivateKey
 	rawPub     []byte
 	nmSource   netmap.Source
-	cnrSource  container.Source
+	cnrSource  ContainerSource
 	eaclSource container.EACLSource
 	forest     pilorama.Forest
 	// replication-related parameters
@@ -29,7 +38,7 @@ type Option func(*cfg)
 
 // WithContainerSource sets a container source for a tree service.
 // This option is required.
-func WithContainerSource(src container.Source) Option {
+func WithContainerSource(src ContainerSource) Option {
 	return func(c *cfg) {
 		c.cnrSource = src
 	}

pkg/services/tree/service.go

@@ -24,6 +24,9 @@ type Service struct {
 	replicationTasks chan replicationTask
 	closeCh          chan struct{}
 	containerCache   containerCache
+
+	syncChan chan struct{}
+	cnrMap   map[cidSDK.ID]struct{}
 }
 
 var _ TreeServiceServer = (*Service)(nil)
@@ -48,6 +51,8 @@ func New(opts ...Option) *Service {
 	s.replicateCh = make(chan movePair, s.replicatorChannelCapacity)
 	s.replicationTasks = make(chan replicationTask, s.replicatorWorkerCount)
 	s.containerCache.init(s.containerCacheSize)
+	s.cnrMap = make(map[cidSDK.ID]struct{})
+	s.syncChan = make(chan struct{})
 
 	return &s
 }
@@ -55,6 +60,15 @@ func New(opts ...Option) *Service {
 // Start starts the service.
 func (s *Service) Start(ctx context.Context) {
 	go s.replicateLoop(ctx)
+	go s.syncLoop(ctx)
+
+	select {
+	case <-s.closeCh:
+	case <-ctx.Done():
+	default:
+		// initial sync
+		s.syncChan <- struct{}{}
+	}
 }
 
 // Shutdown shutdowns the service.

pkg/services/tree/signature_test.go

@@ -29,6 +29,22 @@ type dummyNetmapSource struct {
 
 type dummyContainerSource map[string]*containercore.Container
 
+func (s dummyContainerSource) List() ([]cid.ID, error) {
+	res := make([]cid.ID, 0, len(s))
+	var cnr cid.ID
+
+	for cidStr := range s {
+		err := cnr.DecodeString(cidStr)
+		if err != nil {
+			return nil, err
+		}
+
+		res = append(res, cnr)
+	}
+
+	return res, nil
+}
+
 func (s dummyContainerSource) Get(id cid.ID) (*containercore.Container, error) {
 	cnt, ok := s[id.String()]
 	if !ok {

pkg/services/tree/sync.go

@@ -200,3 +200,113 @@ func (s *Service) synchronizeSingle(ctx context.Context, d pilorama.CIDDescripto
 		height = newHeight
 	}
 }
+
+// ErrAlreadySyncing is returned when a service synchronization has already
+// been started.
+var ErrAlreadySyncing = errors.New("service is being synchronized")
+
+// ErrShuttingDown is returned when the service is shitting down and could not
+// accept any calls.
+var ErrShuttingDown = errors.New("service is shutting down")
+
+// SynchronizeAll forces tree service to synchronize all the trees according to
+// netmap information. Must not be called before Service.Start.
+// Returns ErrAlreadySyncing if synchronization has been started and blocked
+// by another routine.
+// Note: non-blocking operation.
+func (s *Service) SynchronizeAll() error {
+	select {
+	case <-s.closeCh:
+		return ErrShuttingDown
+	default:
+	}
+
+	select {
+	case s.syncChan <- struct{}{}:
+		return nil
+	default:
+		return ErrAlreadySyncing
+	}
+}
+
+func (s *Service) syncLoop(ctx context.Context) {
+	for {
+		select {
+		case <-s.closeCh:
+			return
+		case <-ctx.Done():
+			return
+		case <-s.syncChan:
+			s.log.Debug("syncing trees...")
+
+			cnrs, err := s.cfg.cnrSource.List()
+			if err != nil {
+				s.log.Error("could not fetch containers", zap.Error(err))
+				continue
+			}
+
+			newMap := make(map[cid.ID]struct{}, len(s.cnrMap))
+			cnrsToSync := make([]cid.ID, 0, len(cnrs))
+
+			for _, cnr := range cnrs {
+				_, pos, err := s.getContainerNodes(cnr)
+				if err != nil {
+					s.log.Error("could not calculate container nodes",
+						zap.Stringer("cid", cnr),
+						zap.Error(err))
+					delete(s.cnrMap, cnr)
+
+					continue
+				}
+
+				if pos < 0 {
+					// node is not included in the container.
+					continue
+				}
+
+				_, ok := s.cnrMap[cnr]
+				if ok {
+					// known container; already in sync.
+					delete(s.cnrMap, cnr)
+					newMap[cnr] = struct{}{}
+				} else {
+					// unknown container; need to sync.
+					cnrsToSync = append(cnrsToSync, cnr)
+				}
+			}
+
+			// sync new containers
+			for _, cnr := range cnrsToSync {
+				s.log.Debug("syncing container trees...", zap.Stringer("cid", cnr))
+
+				err = s.SynchronizeAllTrees(ctx, cnr)
+				if err != nil {
+					s.log.Error("could not sync trees", zap.Stringer("cid", cnr), zap.Error(err))
+					continue
+				}
+
+				// mark as synced
+				newMap[cnr] = struct{}{}
+
+				s.log.Debug("container trees have been synced", zap.Stringer("cid", cnr))
+			}
+
+			// remove stored redundant trees
+			for cnr := range s.cnrMap {
+				s.log.Debug("removing redundant trees...", zap.Stringer("cid", cnr))
+
+				err = s.DropTree(ctx, cnr, "") // TODO: #1940 drop all the trees here
+				if err != nil {
+					s.log.Error("could not remove redundant tree",
+						zap.Stringer("cid", cnr),
+						zap.Error(err))
+					continue
+				}
+			}
+
+			s.cnrMap = newMap
+
+			s.log.Debug("trees have been synchronized")
+		}
+	}
+}