sovereign/roles/common/tasks/swap.yml

---
# adapted from https://stackoverflow.com/a/24765946

- name: Create swap files
  command: dd if=/dev/zero of={{ '%s%d' | format(swap_file_path, item) }} bs=1024 count={{ swap_file_size }}K
           creates="{{ '%s%d' | format(swap_file_path, item) }}"
  loop: "{{ range(1, ( swap_file_count | int ) + 1) | list }}"

- name: Change swap file permissions
  file: path="{{ '%s%d' | format(swap_file_path, item) }}"
        owner=root
        group=root
        mode=0600
  loop: "{{ range(1, ( swap_file_count | int ) + 1) | list }}"

- name: Check swap file types
  command: file {{ '%s%d' | format(swap_file_path, item) }}
  register: swapfile
  loop: "{{ range(1, ( swap_file_count | int ) + 1) | list }}"

- name: Make swap files
  command: "mkswap {{ '%s%d' | format(swap_file_path, item) }}"
  become: true
  when: swapfile.results[item - 1].stdout.find('swap file') == -1
  loop: "{{ range(1, ( swap_file_count | int ) + 1) | list }}"

- name: Write swap entries in fstab
  mount: name=none
         src={{ '%s%d' | format(swap_file_path, item) }}
         fstype=swap
         opts=sw
         passno=0
         dump=0
         state=present
  loop: "{{ range(1, ( swap_file_count | int )+ 1) |list }}"

- name: Mount swap
  command: "swapon --all"
  become: true