actualized for kubespray version 2.28.0

kubespray/project/roles/kubernetes/preinstall/tasks/0100-dhclient-hooks.yml

@@ -1,15 +1,20 @@
 ---
 - name: Configure dhclient to supersede search/domain/nameservers
   blockinfile:
+    # 1 is the 2nd item of a tuple in items()
     block: |-
-      {% for item in [supersede_domain, supersede_search, supersede_nameserver] | reject('equalto', '') -%}
-      {{ item }}
+      {% for key, val in dhclient_supersede.items() | rejectattr(1, '==', []) -%}
+      {% if key == "domain-name-servers" -%}
+      supersede {{ key }} {{ val | join(',') }};
+      {% else -%}
+      supersede {{ key }} "{{ val | join('","') }}";
+      {% endif -%}
       {% endfor %}
     path: "{{ dhclientconffile }}"
     create: true
     state: present
     insertbefore: BOF
-    backup: true
+    backup: "{{ leave_etc_backup_files }}"
     marker: "# Ansible entries {mark}"
     mode: "0644"
   notify: Preinstall | propagate resolvconf to k8s components