[#222] Use write cache options in storage app

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-node/config.go

@@ -117,6 +117,7 @@ const (
 	cfgShardUseWriteCache = "use_write_cache"
 
 	cfgBlobStorSection      = "blobstor"
+	cfgWriteCacheSection    = "writecache"
 	cfgBlobStorCompress     = "compress"
 	cfgBlobStorShallowDepth = "shallow_depth"
 	cfgBlobStorTreePath     = "path"
@@ -442,6 +443,15 @@ func initShardOptions(c *cfg) {
 			configPath(prefix, cfgShardUseWriteCache),
 		)
 
+		writeCachePrefix := configPath(prefix, cfgWriteCacheSection)
+
+		writeCachePath := c.viper.GetString(
+			configPath(writeCachePrefix, cfgBlobStorTreePath),
+		)
+		if useCache && writeCachePath == "" {
+			break
+		}
+
 		blobPrefix := configPath(prefix, cfgBlobStorSection)
 
 		blobPath := c.viper.GetString(
@@ -517,10 +527,14 @@ func initShardOptions(c *cfg) {
 				meta.WithPermissions(metaPerm),
 			),
 			shard.WithWriteCache(useCache),
+			shard.WithWriteCacheOptions(
+				blobstor.WithTreeRootPath(writeCachePath),
+			),
 		})
 
 		c.log.Info("storage shard options",
 			zap.Bool("with write cache", useCache),
+			zap.String("with write cache path", writeCachePath),
 			zap.String("BLOB path", blobPath),
 			zap.Stringer("BLOB permissions", blobPerm),
 			zap.Bool("BLOB compress", compressObjects),

pkg/local_object_storage/shard/info.go

@@ -16,6 +16,9 @@ type Info struct {
 	// Information about the BLOB storage.
 	BlobStorInfo blobstor.Info
 
+	// Information about the Write Cache.
+	WriteCacheInfo blobstor.Info
+
 	// Weight parameters of the shard.
 	WeightValues WeightValues
 }

pkg/local_object_storage/shard/shard.go

@@ -32,6 +32,8 @@ type cfg struct {
 
 	metaOpts []meta.Option
 
+	writeCacheOpts []blobstor.Option
+
 	log *logger.Logger
 }
 
@@ -51,10 +53,11 @@ func New(opts ...Option) *Shard {
 
 	if c.useWriteCache {
 		writeCache = blobstor.New(
+			append(c.blobOpts, append(
+				c.writeCacheOpts,
 				blobstor.WithBlobovniczaShallowDepth(0),
-			blobstor.WithBlobovniczaShallowWidth(1),
-			blobstor.WithLogger(c.log),
-			// ? what about path
+				blobstor.WithBlobovniczaShallowWidth(1))...,
+			)...,
 		)
 	}
 
@@ -88,6 +91,13 @@ func WithMetaBaseOptions(opts ...meta.Option) Option {
 	}
 }
 
+// WithMetaBaseOptions returns option to set internal metabase options.
+func WithWriteCacheOptions(opts ...blobstor.Option) Option {
+	return func(c *cfg) {
+		c.writeCacheOpts = opts
+	}
+}
+
 // WithLogger returns option to set Shard's logger.
 func WithLogger(l *logger.Logger) Option {
 	return func(c *cfg) {