[#2165] services/tree: Allow to set custom synchronization interval

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

cmd/frostfs-node/config/tree/config.go

@@ -63,3 +63,11 @@ func (c TreeConfig) ReplicationChannelCapacity() int {
 func (c TreeConfig) ReplicationWorkerCount() int {
 	return int(config.IntSafe(c.cfg, "replication_worker_count"))
 }
+
+// SyncInterval returns the value of "sync_interval"
+// config parameter from the "tree" section.
+//
+// Returns 0 if config value is not specified.
+func (c TreeConfig) SyncInterval() time.Duration {
+	return config.DurationSafe(c.cfg, "sync_interval")
+}

cmd/frostfs-node/config/tree/config_test.go

@@ -33,6 +33,7 @@ func TestTreeSection(t *testing.T) {
 		require.Equal(t, 32, treeSec.ReplicationChannelCapacity())
 		require.Equal(t, 32, treeSec.ReplicationWorkerCount())
 		require.Equal(t, 5*time.Second, treeSec.ReplicationTimeout())
+		require.Equal(t, time.Hour, treeSec.SyncInterval())
 	}
 
 	configtest.ForEachFileType(path, fileConfigTest)

cmd/frostfs-node/tree.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"errors"
+	"time"
 
 	treeconfig "github.com/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/tree"
 	"github.com/TrueCloudLab/frostfs-node/pkg/core/container"
@@ -63,12 +64,29 @@ func initTreeService(c *cfg) {
 		c.treeService.Start(ctx)
 	}))
 
+	if d := treeConfig.SyncInterval(); d == 0 {
 		addNewEpochNotificationHandler(c, func(_ event.Event) {
 			err := c.treeService.SynchronizeAll()
 			if err != nil {
 				c.log.Error("could not synchronize Tree Service", zap.Error(err))
 			}
 		})
+	} else {
+		go func() {
+			tick := time.NewTicker(d)
+			defer tick.Stop()
+
+			for range tick.C {
+				err := c.treeService.SynchronizeAll()
+				if err != nil {
+					c.log.Error("could not synchronize Tree Service", zap.Error(err))
+					if errors.Is(err, tree.ErrShuttingDown) {
+						return
+					}
+				}
+			}
+		}()
+	}
 
 	subscribeToContainerRemoval(c, func(e event.Event) {
 		ev := e.(containerEvent.DeleteSuccess)

config/example/node.env

@@ -35,6 +35,7 @@ NEOFS_TREE_CACHE_SIZE=15
 NEOFS_TREE_REPLICATION_CHANNEL_CAPACITY=32
 NEOFS_TREE_REPLICATION_WORKER_COUNT=32
 NEOFS_TREE_REPLICATION_TIMEOUT=5s
+NEOFS_TREE_SYNC_INTERVAL=1h
 
 # gRPC section
 ## 0 server

config/example/node.json

@@ -80,7 +80,8 @@
     "cache_size": 15,
     "replication_channel_capacity": 32,
     "replication_worker_count": 32,
-    "replication_timeout": "5s"
+    "replication_timeout": "5s",
+    "sync_interval": "1h"
   },
   "control": {
     "authorized_keys": [

config/example/node.yaml

@@ -65,6 +65,7 @@ tree:
   replication_worker_count: 32
   replication_channel_capacity: 32
   replication_timeout: 5s
+  sync_interval: 1h
 
 control:
   authorized_keys:  # list of hex-encoded public keys that have rights to use the Control Service