---
- name: Check for an existing swapfile
  ansible.builtin.stat:
    path: "{{ swap_file }}"
  register: swap_stat

- name: Create swapfile
  ansible.builtin.command:
    cmd: "dd if=/dev/zero of={{ swap_file }} bs=1M count={{ swap_size_mb }} status=none"
  when: not swap_stat.stat.exists or (swap_stat.stat.size != swap_size_mb * 1024 * 1024)
  register: swap_created

- name: Restrict swapfile permissions
  ansible.builtin.file:
    path: "{{ swap_file }}"
    mode: '0600'
    owner: root
    group: root
  when: not ansible_check_mode or swap_stat.stat.exists

- name: Format swapfile
  ansible.builtin.command:
    cmd: "mkswap {{ swap_file }}"
  when: swap_created is changed

- name: Add swapfile to /etc/fstab
  ansible.builtin.lineinfile:
    path: /etc/fstab
    regexp: "^{{ swap_file }}\\s"
    line: "{{ swap_file }} none swap sw 0 0"

- name: Enable swap
  ansible.builtin.command:
    cmd: "swapon {{ swap_file }}"
  register: swapon_result
  changed_when: swapon_result.rc == 0
  failed_when: swapon_result.rc != 0 and 'busy' not in swapon_result.stderr

- name: Set swappiness
  ansible.builtin.copy:
    dest: /etc/sysctl.d/90-swap.conf
    content: "vm.swappiness = {{ swap_swappiness }}\n"
    mode: '0644'
  register: swappiness_conf

- name: Apply swappiness
  ansible.builtin.command:
    cmd: sysctl -p /etc/sysctl.d/90-swap.conf
  when: swappiness_conf is changed