Improve scale flow and documentation (#7610)

* Improve scale flow

* Add confirmation prompt again

remove-node.yml

@@ -8,24 +8,25 @@
 - hosts: "{{ node | default('etcd:k8s_cluster:calico_rr') }}"
   gather_facts: no
   environment: "{{ proxy_disable_env }}"
-  vars_prompt:
-    name: "delete_nodes_confirmation"
-    prompt: "Are you sure you want to delete nodes state? Type 'yes' to delete nodes."
-    default: "no"
-    private: no
+  tasks:
+    - name: Confirm Execution
+      pause:
+        prompt: "Are you sure you want to delete nodes state? Type 'yes' to delete nodes."
+      register: pause_result
+      run_once: True
+      when:
+        - not (skip_confirmation | default(false) | bool)
 
-  pre_tasks:
-    - name: check confirmation
+    - name: Fail if user does not confirm deletion
       fail:
         msg: "Delete nodes confirmation failed"
-      when: delete_nodes_confirmation != "yes"
+      when: pause_result.user_input | default('yes') != 'yes'
 
 - hosts: kube_control_plane[0]
   gather_facts: no
   environment: "{{ proxy_disable_env }}"
   roles:
     - { role: kubespray-defaults }
-    - { role: bootstrap-os, tags: bootstrap-os }
     - { role: remove-node/pre-remove, tags: pre-remove }
 
 - hosts: "{{ node | default('kube_node') }}"
@@ -33,7 +34,6 @@
   environment: "{{ proxy_disable_env }}"
   roles:
     - { role: kubespray-defaults, when: reset_nodes|default(True)|bool }
-    - { role: bootstrap-os, tags: bootstrap-os, when: reset_nodes|default(True)|bool }
     - { role: remove-node/remove-etcd-node }
     - { role: reset, tags: reset, when: reset_nodes|default(True)|bool }
 
@@ -43,5 +43,4 @@
   environment: "{{ proxy_disable_env }}"
   roles:
     - { role: kubespray-defaults, when: reset_nodes|default(True)|bool }
-    - { role: bootstrap-os, tags: bootstrap-os, when: reset_nodes|default(True)|bool }
     - { role: remove-node/post-remove, tags: post-remove }