Update 17-extra-dynamic-kubelet-configuration.md

Added reference link and also enhanced the instructions.

docs/17-extra-dynamic-kubelet-configuration.md

@@ -11,9 +11,18 @@ NODE_NAME="worker-1"; NODE_NAME="worker-1"; curl -sSL "https://localhost:6443/ap
 kubectl -n kube-system create configmap nodes-config --from-file=kubelet=kubelet_configz_${NODE_NAME} --append-hash -o yaml
 ```
 
-Edit node to use the dynamically created configuration
+Edit `worker-1` node to use the dynamically created configuration
 ```
-kubectl edit worker-2
+master-1# kubectl edit node worker-1
+```
+
+Add the following YAML bit under `spec`:
+```
+configSource:
+    configMap:
+        name: CONFIG_MAP_NAME # replace CONFIG_MAP_NAME with the name of the ConfigMap
+        namespace: kube-system
+        kubeletConfigKey: kubelet
 ```
 
 Configure Kubelet Service
@@ -45,3 +54,5 @@ RestartSec=5
 WantedBy=multi-user.target
 EOF
 ```
+
+Reference: https://kubernetes.io/docs/tasks/administer-cluster/reconfigure-kubelet/