Ansible role for creating a Swap file

swap.yml

- name: set swap_file variable
  set_fact:
    swap_file: /{{ swap_space }}.swap

- name: check if swap file exists
  stat:
    path: "{{ swap_file }}"
  register: swap_file_check

- name: create swap file
  sudo: yes
  command: fallocate -l {{ swap_space }} {{ swap_file }}
  when: not swap_file_check.stat.exists

- name: Create swap space
  command: dd if=/dev/zero of=/extraswap bs=1M count=512
  when: not swap_file_check.stat.exists

- name: set permissions on swap file
  sudo: yes
  file:
    path: "{{ swap_file }}"
    mode: 0600

- name: format swap file
  sudo: yes
  command: mkswap {{ swap_file }}
  when: not swap_file_check.stat.exists

- name: add to fstab
  sudo: yes
  lineinfile:
    dest: /etc/fstab
    regexp: "{{ swap_file }}"
    line: "{{ swap_file }} none swap sw 0 0"

- name: turn on swap
  sudo: yes
  command: swapon -a

- name: set swapiness
  sudo: yes
  sysctl:
    name: vm.swappiness
    value: "1"

God morning and thanks for sharing this. There are a couple things I do not understand.

1. line #12 you create the swap file using the variable swap_file which appears to be the length of the swap file in bytes with .swap tacked on.
2. line 16 you zero out a file named /extraswap with an arbitrary length and that file appears to be otherwise unused.

Is this something overlooked or am I missing something.

Edit.0: According to https://linuxize.com/post/how-to-change-the-swappiness-value-in-linux/ the swappiness change will revert to the default on the next boot w/out changing /etc/sysctl.conf

In my tests, the value for vm.swappiness will be persisted on /etc/sysctl.conf. I rebooted my instance and the value still in `/etc/sysctl.conf,