add config fields

deps/rabbit/priv/schema/rabbit.schema

@@ -2472,6 +2472,25 @@ end}.
 {mapping, "quorum_queue.compute_checksums", "rabbit.quorum_compute_checksums", [
     {datatype, {enum, [true, false]}}]}.
 
+
+%%
+%% Runtime parameters
+%%
+
+{mapping, "runtime_parameters.limits.$category", "rabbit.runtime_parameters.limits", [
+    {datatype, integer},
+    {validators, ["non_negative_integer"]}
+]}.
+
+{translation, "rabbit.runtime_parameters.limits",
+    fun(Conf) ->
+        case cuttlefish_variable:filter_by_prefix("runtime_parameters.limits", Conf) of
+            [] -> cuttlefish:unset();
+            Ss -> [ {list_to_binary(Category), Limit} || {[_, _, Category], Limit} <- Ss ]
+        end
+    end
+}.
+
 % ===============================
 % Validators
 % ===============================

deps/rabbit/test/config_schema_SUITE_data/rabbit.snippets

@@ -898,6 +898,21 @@ credential_validator.regexp = ^abc\\d+",
      ]}],
    []},
 
+  %%
+  %% Runtime parameters
+  %%
+
+  {runtime_parameters_limits,
+  "
+   runtime_parameters.limits.b = 2
+   runtime_parameters.limits.a = 1
+  ",
+   [{rabbit, [{runtime_parameters, [{limits, [
+       {<<"a">>, 1},
+       {<<"b">>, 2}
+     ]}]}]}],
+   []},
+
   %%
   %% Deprecated features
   %%