move /etc/hosts configuration in 'preinstall' role

roles/dnsmasq/tasks/main.yml

@@ -1,33 +1,4 @@
 ---
-- name: populate inventory into hosts file
-  lineinfile:
-    dest: /etc/hosts
-    regexp: "^{{ hostvars[item]['ip'] | default(hostvars[item].ansible_default_ipv4.address) }} {{ item }}$"
-    line: "{{ hostvars[item]['ip'] | default(hostvars[item].ansible_default_ipv4.address) }} {{ item }}"
-    state: present
-    backup: yes
-  when: hostvars[item].ansible_default_ipv4.address is defined
-  with_items: groups['all']
-
-- name: populate kubernetes loadbalancer address into hosts file
-  lineinfile:
-    dest: /etc/hosts
-    regexp: ".*{{ apiserver_loadbalancer_domain_name }}$"
-    line: "{{ loadbalancer_apiserver.address }} lb-apiserver.kubernetes.local"
-    state: present
-    backup: yes
-  when: loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined
-
-- name: clean hosts file
-  lineinfile:
-    dest: /etc/hosts
-    regexp: "{{ item }}"
-    state: absent
-    backup: yes
-  with_items:
-    - '^127\.0\.0\.1(\s+){{ inventory_hostname }}.*'
-    - '^::1(\s+){{ inventory_hostname }}.*'
-
 - name: ensure dnsmasq.d directory exists
   file:
     path: /etc/dnsmasq.d

roles/kubernetes/preinstall/tasks/etchosts.yml

@@ -0,0 +1,35 @@
+---
+- name: Hosts | populate inventory into hosts file
+  lineinfile:
+    dest: /etc/hosts
+    regexp: "^{{ hostvars[item]['ip'] | default(hostvars[item].ansible_default_ipv4.address) }} {{ item }}$"
+    line: "{{ hostvars[item]['ip'] | default(hostvars[item].ansible_default_ipv4.address) }} {{ item }}"
+    state: present
+    backup: yes
+  when: hostvars[item].ansible_default_ipv4.address is defined
+  with_items: groups['all']
+
+- name: Hosts | populate kubernetes loadbalancer address into hosts file
+  lineinfile:
+    dest: /etc/hosts
+    regexp: ".*{{ apiserver_loadbalancer_domain_name }}$"
+    line: "{{ loadbalancer_apiserver.address }} {{ apiserver_loadbalancer_domain_name| default('lb-apiserver.kubernetes.local') }}"
+    state: present
+    backup: yes
+  when: loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined
+
+- name: Hosts | localhost ipv4 in hosts file
+  lineinfile:
+    dest: /etc/hosts
+    line: "127.0.0.1 localhost localhost.localdomain"
+    regexp: '^127.0.0.1.*$'
+    state: present
+    backup: yes
+
+- name: Hosts | localhost ipv6 in hosts file
+  lineinfile:
+    dest: /etc/hosts
+    line: "::1 localhost6 localhost6.localdomain"
+    regexp: '^::1.*$'
+    state: present
+    backup: yes

roles/kubernetes/preinstall/tasks/main.yml

@@ -51,5 +51,7 @@
   when: ansible_os_family == "RedHat"
   changed_when: False
 
+- include: etchosts.yml
+
 - include: python-bootstrap.yml
   when: ansible_os_family not in [ "Debian", "RedHat" ]