Month: October 2026

tasks:
- name: Check if swapfile exists
stat:
path: "{{ swap_file }}"
register: swapfile_stat

- name: Check existing swap
command: swapon --show
register: swap_check
changed_when: false
ignore_errors: true

- name: Create swapfile with fallocate
command: fallocate -l {{ swap_size_mb }}M {{ swap_file }}
when: not swapfile_stat.stat.exists
register: fallocate_res
failed_when: false

- name: Fallocate failed, use dd fallback
command: dd if=/dev/zero of={{ swap_file }} bs=1M count={{ swap_size_mb }} status=none
when: >
not swapfile_stat.stat.exists
and fallocate_res is failed

- name: Set swapfile permission 0600
file:
path: "{{ swap_file }}"
mode: '0600'
owner: root
group: root

- name: Make swap filesystem
command: mkswap {{ swap_file }}
when: not swapfile_stat.stat.exists

- name: Enable swap
command: swapon {{ swap_file }}
when: not swapfile_stat.stat.exists

- name: Add swap to /etc/fstab (idempotent)
mount:
path: none
src: "{{ swap_file }}"
fstype: swap
opts: sw
state: present

- name: Set vm.swappiness in sysctl
sysctl:
name: vm.swappiness
value: "{{ swappiness }}"
state: present
reload: true

- name: Set vm.vfs_cache_pressure
sysctl:
name: vm.vfs_cache_pressure
value: "{{ vfs_cache_pressure }}"
state: present
reload: true

- name: Verify swap status
command: free -h
changed_when: false
register: free_out