nixos/nginx: add reuseport option

nixos/modules/services/web-servers/nginx/default.nix

@@ -259,6 +259,7 @@ let
           # UDP listener for **QUIC+HTTP/3
           listen ${addr}:${toString port} http3 "
           + optionalString vhost.default "default_server "
+          + optionalString vhost.reuseport "reuseport "
           + ";" else "")
           + "
 
@@ -266,6 +267,7 @@ let
           + optionalString (ssl && vhost.http2) "http2 "
           + optionalString ssl "ssl "
           + optionalString vhost.default "default_server "
+          + optionalString vhost.reuseport "reuseport "
           + optionalString (extraParameters != []) (concatStringsSep " " extraParameters)
           + ";";
 

nixos/modules/services/web-servers/nginx/vhost-options.nix

@@ -31,7 +31,7 @@ with lib;
         addr = mkOption { type = str;  description = "IP address.";  };
         port = mkOption { type = int;  description = "Port number."; default = 80; };
         ssl  = mkOption { type = bool; description = "Enable SSL.";  default = false; };
-        extraParameters = mkOption { type = listOf str; description = "Extra parameters of this listen directive."; default = []; example = [ "reuseport" "deferred" ]; };
+        extraParameters = mkOption { type = listOf str; description = "Extra parameters of this listen directive."; default = []; example = [ "backlog=1024" "deferred" ]; };
       }; });
       default = [];
       example = [
@@ -207,6 +207,15 @@ with lib;
       '';
     };
 
+    reuseport = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Create an individual listening socket .
+        It is required to specify only once on one of the hosts.
+      '';
+    };
+
     root = mkOption {
       type = types.nullOr types.path;
       default = null;