[#877] config/engine: use default section for shards

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-node/config/calls.go

@@ -22,8 +22,6 @@ func (x *Config) Sub(name string) *Config {
 		copy(defaultPath, x.defaultPath)
 	}
 
-	copy(path, x.path)
-
 	return &Config{
 		v:           x.v,
 		path:        append(path, name),

cmd/neofs-node/config/engine/config.go

@@ -28,6 +28,7 @@ func IterateShards(c *config.Config, f func(*shardconfig.Config)) {
 		panic("no shard configured")
 	}
 
+	def := c.Sub("default")
 	c = c.Sub("shard")
 
 	for i := uint64(0); i < num; i++ {
@@ -36,6 +37,7 @@ func IterateShards(c *config.Config, f func(*shardconfig.Config)) {
 		sc := shardconfig.From(
 			c.Sub(si),
 		)
+		(*config.Config)(sc).SetDefault(def)
 
 		f(sc)
 	}

config/example/node.yaml

@@ -86,62 +86,23 @@ object:
 storage:
   shard_pool_size: 15 # size of per-shard worker pools used for PUT operations
   shard_num: 2  # total number of shards
-  shard:
+  default: # section with the default shard parameters
-    0:
-      refill_metabase: false  # sync metabase with blobstore on start, expensive, leave false until complete understanding
-
-      use_write_cache: false  # use write-cache
-
-      writecache:
-        path: tmp/0/cache  # write-cache root directory
-        mem_size: 2147483648  # approximate RAM usage limit for "small" objects, bytes
-        small_size: 16384  # size threshold for "small" objects which are cached in key-value DB, not on FS, bytes
-        max_size: 134217728  # size threshold for "big" objects which bypass write-cache and go to the storage directly, bytes
-        workers_number: 30  # number of write-cache flusher threads
-        size_limit: 3221225472  # approximate write-cache total size, bytes
-
-      metabase:
-        path: tmp/0/meta  # metabase path
-        perm: 0644  # permissions for metabase files(directories: +x for current user and group)
-
-      blobstor:
-        path: tmp/0/blob  # blobstor path
-        perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
-        compress: true  # turn on/off zstd(level 3) compression of stored objects
-        shallow_depth: 5  # max depth of object tree storage in FS
-        small_size_limit: 102400  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
-
-        blobovnicza:
-          size: 4194304  # approximate size limit of single blobovnicza instance, total size will be: size*width^(depth+1), bytes
-          shallow_depth: 1  # max depth of object tree storage in key-value DB
-          shallow_width: 4   # max width of object tree storage in key-value DB
-          opened_cache_size: 50  # maximum number of opened database files
-
-      gc:
-        remover_batch_size: 150  # number of objects to be removed by the garbage collector
-        remover_sleep_interval: 2m  # frequency of the garbage collector invocation
-
-    1:
     refill_metabase: true  # sync metabase with blobstore on start, expensive, leave false until complete understanding
 
     use_write_cache: true  # use write-cache
 
     writecache:
-        path: tmp/1/cache  # write-cache root directory
       mem_size: 2147483648  # approximate RAM usage limit for "small" objects, bytes
       small_size: 16384  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
       max_size: 134217728  # size threshold for "big" objects which bypass write-cache and go to the storage directly, bytes
       workers_number: 30  # number of write-cache flusher threads
-        size_limit: 4294967296  # approximate write-cache total size, bytes
 
     metabase:
-        path: tmp/1/meta  # metabase path
       perm: 0644  # permissions for metabase files(directories: +x for current user and group)
 
     blobstor:
-        path: tmp/1/blob  # blobstor path
-        perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
       compress: false  # turn on/off zstd(level 3) compression of stored objects
+      perm: 0644  # permissions for blobstor files(directories: +x for current user and group)
       shallow_depth: 5  # max depth of object tree storage in FS
       small_size_limit: 102400  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
 
@@ -154,3 +115,35 @@ storage:
     gc:
       remover_batch_size: 200  # number of objects to be removed by the garbage collector
       remover_sleep_interval: 5m  # frequency of the garbage collector invocation
+
+  shard:
+    0:
+      refill_metabase: false  # sync metabase with blobstore on start, expensive, leave false until complete understanding
+
+      use_write_cache: false  # use write-cache
+
+      writecache:
+        path: tmp/0/cache  # write-cache root directory
+        size_limit: 3221225472  # approximate write-cache total size, bytes
+
+      metabase:
+        path: tmp/0/meta  # metabase path
+
+      blobstor:
+        path: tmp/0/blob  # blobstor path
+        compress: true  # turn on/off zstd(level 3) compression of stored objects
+
+      gc:
+        remover_batch_size: 150  # number of objects to be removed by the garbage collector
+        remover_sleep_interval: 2m  # frequency of the garbage collector invocation
+
+    1:
+      writecache:
+        path: tmp/1/cache  # write-cache root directory
+        size_limit: 4294967296  # approximate write-cache total size, bytes
+
+      metabase:
+        path: tmp/1/meta  # metabase path
+
+      blobstor:
+        path: tmp/1/blob  # blobstor path