# code: language=ansible

- name: Disable IPv6 Link Local Addressing
  ansible.builtin.lineinfile:
    path: /etc/systemd/network/10-cloud-init-eth0.network
    line: "{{ item.line }}"
    regexp: "{{ item.regexp }}"
    insertafter: '^\[Network\]$'
    firstmatch: true
    state: present
  loop:
    - line: LinkLocalAddressing=no
      regexp: '^LinkLocalAddressing\s*=\s*.*$'
    - line: IPv6LinkLocalAddressGenerationMode=none
      regexp: '^IPv6LinkLocalAddressGenerationMode\s*=\s*.*$'
  loop_control:
    label: "{{ item.line }}"
  notify:
    - Reboot

- name: Disable ipv6 (all)
  ansible.posix.sysctl:
    name: "{{ item }}"
    reload: true
    state: present
    sysctl_set: true
    value: 1
  loop:
    - net.ipv6.conf.all.disable_ipv6
    - net.ipv6.conf.default.disable_ipv6
    - net.ipv6.conf.lo.disable_ipv6
  notify:
    - Reboot

- name: Remove IPv6 localhost entries from /etc/hosts
  when:
    - (ipv4_only | default(false))
  ansible.builtin.lineinfile:
    path: /etc/hosts
    line: "{{ item }}"
    state: absent
  loop:
    - '::1 localhost ip6-localhost ip6-loopback'
    - 'ff02::1 ip6-allnodes'
    - 'ff02::2 ip6-allrouters'
  notify:
    - Reboot

- name: Flush handlers to trigger reboot if required
  ansible.builtin.meta: flush_handlers