[#826] blobovniczatree: Do not create DB's on init

Blobovniczas will be created on write requests.

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

cmd/frostfs-node/config.go

@@ -183,6 +183,7 @@ type subStorageCfg struct {
 	leafWidth       uint64
 	openedCacheSize int
 	initWorkerCount int
+	initInAdvance   bool
 }
 
 // readConfig fills applicationConfiguration with raw configuration values
@@ -302,6 +303,7 @@ func (a *applicationConfiguration) setShardStorageConfig(newConfig *shardCfg, ol
 			sCfg.leafWidth = sub.LeafWidth()
 			sCfg.openedCacheSize = sub.OpenedCacheSize()
 			sCfg.initWorkerCount = sub.InitWorkerCount()
+			sCfg.initInAdvance = sub.InitInAdvance()
 		case fstree.Type:
 			sub := fstreeconfig.From((*config.Config)(storagesCfg[i]))
 			sCfg.depth = sub.Depth()
@@ -802,6 +804,7 @@ func (c *cfg) getSubstorageOpts(shCfg shardCfg) []blobstor.SubStorage {
 				blobovniczatree.WithBlobovniczaLeafWidth(sRead.leafWidth),
 				blobovniczatree.WithOpenedCacheSize(sRead.openedCacheSize),
 				blobovniczatree.WithInitWorkerCount(sRead.initWorkerCount),
+				blobovniczatree.WithInitInAdvance(sRead.initInAdvance),
 				blobovniczatree.WithLogger(c.log),
 				blobovniczatree.WithObjectSizeLimit(shCfg.smallSizeObjectLimit),
 			}

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

@@ -100,6 +100,7 @@ func TestEngineSection(t *testing.T) {
 				require.EqualValues(t, 50, blz.OpenedCacheSize())
 				require.EqualValues(t, 10, blz.LeafWidth())
 				require.EqualValues(t, 10, blz.InitWorkerCount())
+				require.EqualValues(t, true, blz.InitInAdvance())
 
 				require.Equal(t, "tmp/0/blob", ss[1].Path())
 				require.EqualValues(t, 0o644, ss[1].Perm())

cmd/frostfs-node/config/engine/shard/blobstor/blobovnicza/config.go

@@ -131,3 +131,13 @@ func (x *Config) InitWorkerCount() int {
 
 	return InitWorkerCountDefault
 }
+
+// InitInAdvance returns the value of "init_in_advance" config parameter.
+//
+// Returns False if the value is not defined or invalid.
+func (x *Config) InitInAdvance() bool {
+	return config.BoolSafe(
+		(*config.Config)(x),
+		"init_in_advance",
+	)
+}