--- - name: Hosts | populate inventory into hosts file blockinfile: dest: /etc/hosts block: |- {% for item in (groups['k8s-cluster'] + groups['etcd'] + groups['calico-rr']|default([]))|unique -%}{{ hostvars[item]['access_ip'] | default(hostvars[item]['ip'] | default(hostvars[item]['ansible_default_ipv4']['address'])) }}{% if (item != hostvars[item]['ansible_hostname']) %} {{ hostvars[item]['ansible_hostname'] }}.{{ dns_domain }} {{ hostvars[item]['ansible_hostname'] }}{% endif %} {{ item }} {{ item }}.{{ dns_domain }} {% endfor %} state: present create: yes backup: yes unsafe_writes: yes marker: "# Ansible inventory hosts {mark}" when: populate_inventory_to_hosts_file - name: Hosts | populate kubernetes loadbalancer address into hosts file lineinfile: dest: /etc/hosts regexp: ".*{{ apiserver_loadbalancer_domain_name }}$" line: "{{ loadbalancer_apiserver.address }} {{ apiserver_loadbalancer_domain_name }}" state: present backup: yes unsafe_writes: yes when: - loadbalancer_apiserver is defined - loadbalancer_apiserver.address is defined - name: Hosts | Retrieve hosts file content slurp: src: /etc/hosts register: etc_hosts_content - name: Hosts | Extract existing entries for localhost from hosts file set_fact: etc_hosts_localhosts_dict: >- {%- set splitted = (item | regex_replace('[ \t]+', ' ')|regex_replace('#.*$')|trim).split( ' ') -%} {{ etc_hosts_localhosts_dict|default({}) | combine({splitted[0]: splitted[1::] }) }} with_items: "{{ (etc_hosts_content['content'] | b64decode).split('\n') }}" when: - etc_hosts_content.content is defined - (item is match('^::1 .*') or item is match('^127.0.0.1 .*')) - name: Hosts | Update target hosts file entries dict with required entries set_fact: etc_hosts_localhosts_dict_target: >- {%- set target_entries = (etc_hosts_localhosts_dict|default({})).get(item.key, []) | difference(item.value.get('unexpected' ,[])) -%} {{ etc_hosts_localhosts_dict_target|default({}) | combine({item.key: (target_entries + item.value.expected)|unique}) }} with_dict: "{{ etc_hosts_localhost_entries }}" - name: Hosts | Update (if necessary) hosts file lineinfile: dest: /etc/hosts line: "{{ item.key }} {{ item.value|join(' ') }}" regexp: "^{{ item.key }}.*$" state: present backup: yes unsafe_writes: yes with_dict: "{{ etc_hosts_localhosts_dict_target }}"