reuse code

Author: Ben Iofel

internal/flypg/node.go

@@ -578,7 +578,7 @@ func (n *Node) migrateNodeNameIfNeeded(ctx context.Context, repConn *pgx.Conn) e
 			return fmt.Errorf("failed to clone standby: %s", err)
 		}
 
-		if err := n.PGConfig.reload(ctx); err != nil {
+		if err := admin.ReloadPostgresConfig(ctx, repConn); err != nil {
 			return fmt.Errorf("failed to reload postgresql: %s", err)
 		}
 	}

internal/flypg/pg.go

@@ -606,11 +606,3 @@ func diskSizeInBytes(dir string) (uint64, error) {
 	}
 	return stat.Blocks * uint64(stat.Bsize), nil
 }
-
-func (*PGConfig) reload(ctx context.Context) error {
-	_, err := utils.RunCmd(ctx, "postgres", "pg_ctl", "-D", "/data/postgresql/", "reload")
-	if err != nil {
-		return fmt.Errorf("failed to reload postgres: %s", err)
-	}
-	return nil
-}