ansible-role-common/tasks/networking.yml

---
- name: What is virtualization type?
  debug:
    msg: "Virtualization is: {{ ansible_virtualization_type }}"

- name: Ensure Network Setup (RedHat only)
  template:
    src: "{{ network_config.src }}"
    dest: "{{ network_config.dest }}"
    mode: "{{ network_config.mode }}"
    backup: yes
  with_items:
    - {
        src: etc.sysconfig.network.j2,
        dest: /etc/sysconfig/network,
        mode: u+rw,
        a+r,
      }
  when: >
    ansible_virtualization_type != "docker"
    and ansible_virtualization_type != "container"
    and ansible_os_family == "RedHat"
  loop_control:
    loop_var: network_config
  tags: dns

- name: Ensure Resolvers Configured
  template:
    src: "{{ network_config.src }}"
    dest: "{{ network_config.dest }}"
    mode: "{{ network_config.mode }}"
    backup: yes
  with_items:
    - { src: etc.resolv.conf.j2, dest: /etc/resolv.conf, mode: u+rw, a+r }
  when: >
    ansible_virtualization_type != "docker"
    and ansible_virtualization_type != "container"
  loop_control:
    loop_var: network_config
  tags: dns

- name: Ensure hosts file correct
  lineinfile:
    dest: /etc/hosts
    regexp: "{{ hosts_config.regexp }}"
    line: "{{ hosts_config.line }}"
    backrefs: yes
    backup: yes
  with_items:
    - {
        regexp: "^127.0.0.1.+localdomain4$",
        line: "127.0.0.1   localhost {{ inventory_hostname }}",
      }
    - {
        regexp: "^::1.+localdomain6$",
        line: "::1         localhost {{ inventory_hostname }}",
      }
    - {
        regexp: "^{{ ansible_default_ipv4.address }}.*{{ ansible_default_ipv4.address.split('.')[-1] }}$",
        line: "{{ ansible_default_ipv4.address }}  {{ inventory_hostname }}.{{ domain }} {{ inventory_hostname }}",
      }
    - {
        regexp: "^127.0.0.1.+{{ ansible_nodename.split('.')[0] }}$",
        line: "127.0.0.1   localhost {{ inventory_hostname }}",
      }
    - {
        regexp: "^::1.+{{ ansible_nodename.split('.')[0] }}$",
        line: "::1         localhost {{ inventory_hostname }}",
      }
    - {
        regexp: "^{{ ansible_default_ipv4.address }}.*{{ ansible_nodename.split('.')[0] }}$",
        line: "{{ ansible_default_ipv4.address }}  {{ inventory_hostname }}.{{ domain }} {{ inventory_hostname }}",
      }
  loop_control:
    loop_var: hosts_config
  when: ansible_virtualization_type != "docker" and ansible_virtualization_type != "container"

- name: Ensure NetworkManager does not fiddle DNS
  ini_file:
    dest: /etc/NetworkManager/NetworkManager.conf
    section: "main"
    option: "dns"
    value: "none"
    backup: yes
  when: (ansible_os_family == "RedHat" and ansible_distribution_major_version == "7")
  notify:
    - Restart NetworkManager
  changed_when: false

- name: Ensure correct permissions (hosts/resolv.conf)
  file:
    path: "{{ perm_config }}"
    state: touch
    mode: u+rw,g+r,a+r
  with_items:
    - /etc/resolv.conf
    - /etc/hosts
  loop_control:
    loop_var: perm_config
  changed_when: false
  tags: dns