Merge pull request #278648 from ninpan-ms/ninpan/pod

Add pod overrides config for SCG

Author: prmerger-automator[bot]

articles/spring-apps/enterprise/how-to-configure-enterprise-spring-cloud-gateway.md

@@ -817,6 +817,46 @@ The following list shows the supported add-on configurations for the add-on key
     }
     ```
 
+- Pod configuration
+  - Key name: `PodOverrides`, which is used to specify overrides for the default pod configuration.
+  - Value type: Object
+  - Properties
+    - `Containers`: This array contains the configuration for individual containers within the pod. Only the container named `gateway` is supported currently.
+      - `Name`: Specifies the name of the container. The container should be named `gateway`.
+      - `Lifecycle`: `PreStop` is a lifecycle hook that's executed when a container is about to be terminated. This hook enables you to perform any necessary cleanup before the container stops.
+    - `TerminationGracePeriodSeconds`: Specifies the amount of time Kubernetes waits for a pod to terminate gracefully before forcibly killing it.
+  - Example:
+
+    ```json
+    {
+        "PodOverrides": {
+            "Containers": [
+                {
+                    {
+                        "Name": "gateway",
+                        "Lifecycle": {
+                            "PreStop": {
+                                "Exec": {
+                                    "Command": [
+                                        "/bin/sh",
+                                        "-c",
+                                        "sleep 20"
+                                    ]
+                                }
+                            }
+                        }
+                    }
+                }
+            ],
+            "TerminationGracePeriodSeconds": 120
+        }
+    }
+    ```
+    
+    When a pod containing this container is being terminated, the `PreStop` hook executes the command `/bin/sh -c 'sleep 20'`, causing the container to sleep for 20 seconds. This pause gives the container some time to complete any ongoing tasks or cleanup before it actually stops.
+    
+    The `TerminationGracePeriodSeconds` setting provides a total of 120 seconds for the pod to terminate gracefully, including the time taken by any lifecycle hooks, such as `PreStop`.
+
 Use the following steps to update the add-on configuration.
 
 ### [Azure portal](#tab/Azure-portal)