Update nodes in etc hosts after cluster scale (#9837)

roles/kubernetes/preinstall/defaults/main.yml

@@ -38,6 +38,8 @@ resolveconf_cloud_init_conf: /etc/resolveconf_cloud_init.conf
 populate_inventory_to_hosts_file: true
 # K8S Api FQDN will be written into /etc/hosts file.
 populate_loadbalancer_apiserver_to_hosts_file: true
+# etc_hosts_localhost_entries will be written into /etc/hosts file.
+populate_localhost_entries_to_hosts_file: true
 
 sysctl_file_path: "/etc/sysctl.d/99-sysctl.conf"
 

roles/kubernetes/preinstall/tasks/0090-etchosts.yml

 ---
+- name: Hosts | update inventory in hosts file
+  block:
     - name: Hosts | create list from inventory
       set_fact:
         etc_hosts_inventory_block: |-
@@ -39,6 +41,8 @@
     - loadbalancer_apiserver is defined
     - loadbalancer_apiserver.address is defined
 
+- name: Hosts | Update localhost entries in hosts file
+  block:
     - name: Hosts | Retrieve hosts file content
       slurp:
         src: /etc/hosts
@@ -70,8 +74,11 @@
         backup: yes
         unsafe_writes: yes
       loop: "{{ etc_hosts_localhosts_dict_target|default({})|dict2items }}"
+  when: populate_localhost_entries_to_hosts_file
 
 # gather facts to update ansible_fqdn
 - name: Update facts
   setup:
     gather_subset: min
+  when:
+    - not dns_late

roles/kubernetes/preinstall/tasks/main.yml

@@ -74,8 +74,6 @@
     - bootstrap-os
 
 - import_tasks: 0090-etchosts.yml
-  when:
-    - not dns_late
   tags:
     - bootstrap-os
     - etchosts