--output-watch-events

slides/k8s/architecture.md

@@ -287,9 +287,9 @@ class: extra-details
 
 - "GVK" appears a lot in the API machinery code
 
-- Conversions are possible between different versions
+- Conversions are possible between different versions and even between API groups
 
-  (and even between API groups; e.g. when Deployments moved from `extensions` to `apps`)
+  (e.g. when Deployments moved from `extensions` to `apps`)
 
 ---
 
@@ -354,6 +354,34 @@ We demonstrated *update* and *watch* semantics.
 
 ---
 
+class: extra-details
+
+## Watch events
+
+- `kubectl get --watch` shows changes
+
+- If we add `--output-watch-events`, we can also see:
+
+  - the difference between ADDED and MODIFIED resources
+
+  - DELETED resources
+
+.exercise[
+
+- In one terminal, watch pods, displaying full events:
+  ```bash
+  kubectl get pods --watch --output-watch-events
+  ```
+
+- In another, run a short-lived pod:
+  ```bash
+  kubectl run pause --image=alpine --rm -ti --restart=Never -- sleep 5
+  ```
+
+]
+
+---
+
 # Other control plane components
 
 - API server ✔️