Add Inner Ring code

cmd/neofs-node/modules/node/core.go

@@ -0,0 +1,35 @@
+package node
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/bucket"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/bucket/boltdb"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/bucket/fsbucket"
+	"github.com/spf13/viper"
+)
+
+type Buckets map[string]bucket.Bucket
+
+const (
+	fsBucket   = "fsbucket"
+	boltBucket = "bolt"
+)
+
+func newBuckets(v *viper.Viper) (Buckets, error) {
+	var (
+		err      error
+		mBuckets = make(Buckets)
+	)
+
+	if mBuckets[fsBucket], err = fsbucket.NewBucket(v); err != nil {
+		return nil, err
+	}
+
+	boltOpts, err := boltdb.NewOptions(v)
+	if err != nil {
+		return nil, err
+	} else if mBuckets[boltBucket], err = boltdb.NewBucket(&boltOpts); err != nil {
+		return nil, err
+	}
+
+	return mBuckets, nil
+}