- name: Check if swap file exists
  stat:
    path: /swapfile
  register: swap_file_check

- name: create file for swap
  shell: /usr/bin/fallocate -l 1G /swapfile
  when: not swap_file_check.stat.exists

- name: format swap file
  shell: /sbin/mkswap /swapfile
  when: not swap_file_check.stat.exists

- name: set permission to swap file
  file: path=/swapfile owner=root group=root mode=0600

- name: add swap file to system
  shell: /sbin/swapon /swapfile
  when: not swap_file_check.stat.exists

- name: write changes to fstab
  mount: name=none src=/swapfile fstype=swap opts=sw passno=0 dump=0 state=present