make_swap.yml

---
- hosts: jenkins
  remote_user: root
  tasks:
  
  - name: Pull in the swap variables
    include_vars: swap_vars

  - name: Set swap_file variable
    set_fact:
      swap_file: "{{swap_file_path}}"
    tags:
      - swap.set.file.path
  
  - name: Check if swap file exists
    stat:
      path: "{{swap_file}}"
    register: swap_file_check
    tags:
      - swap.file.check
  
  - name: Create swap file
    command: fallocate -l {{swap_file_size}} {{swap_file}}
    when: not swap_file_check.stat.exists
    tags:
      - swap.file.create
  
  - name: Change swap file permissions
    file: path="{{swap_file}}"
          owner=root
          group=root
          mode=0600
    tags:
      - swap.file.permissions
  
  - name: Format swap file
    command: "mkswap {{swap_file}}"
    when: not swap_file_check.stat.exists
    tags:
      - swap.file.mkswap
  
  - name: Write swap entry in fstab
    mount: name=none
           src={{swap_file}}
           fstype=swap
           opts=sw
           passno=0
           dump=0
           state=present
    tags:
      - swap.fstab
  
  - name: Turn on swap
    command: swapon -a
    when: not swap_file_check.stat.exists
    tags:
      - swap.turn.on
  
  - name: Set swappiness
    sysctl:
      name: vm.swappiness
      value: "{{swappiness}}"
    tags:
      - swap.set.swappiness