Add :uuid to process_action.action_controller payloads

actionpack/CHANGELOG.md

-*   `process_action.action_controller` notifications include the `Location`
-    response header under `:location` in their payloads.
+*   `process_action.action_controller` notifications now include the following in their payloads:
+
+    * `:uuid` - the request's globally-unique ID (the `X-Request-Id` response header by default)
+    * `:location` - the `Location` response header
 
     *George Claghorn*
 

actionpack/lib/action_controller/metal/instrumentation.rb

@@ -24,7 +24,8 @@ def process_action(*)
         headers: request.headers,
         format: request.format.ref,
         method: request.request_method,
-        path: request.fullpath
+        path: request.fullpath,
+        uuid: request.uuid
       }
 
       ActiveSupport::Notifications.instrument("start_processing.action_controller", raw_payload)

guides/source/active_support_instrumentation.md

@@ -140,6 +140,7 @@ Action Controller
 | `:format`       | html/js/json/xml etc                                      |
 | `:method`       | HTTP request verb                                         |
 | `:path`         | Request path                                              |
+| `:uuid`         | Globally-unique request ID (X-Request-Id response header) |
 | `:status`       | HTTP status code                                          |
 | `:location`     | Location response header                                  |
 | `:view_runtime` | Amount spent in view in ms                                |