---
# Copyright 2015, Rackspace US, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- block:
    - name: Check if swap is already enabled
      command: grep /openstack/swap.img /proc/swaps

  rescue:
    - name: Create swap file
      command: "{{ swap_create_command }}"
      args:
        creates: /openstack/swap.img
      register: swap_create
      tags:
        - swap-file-create

    - name: Set swap file permissions to 0600
      file:
        path: /openstack/swap.img
        mode: 0600
      tags:
        - swap-permissions

    - name: Format the swap file
      command: mkswap /openstack/swap.img
      when: swap_create | changed
      tags:
        - swap-format

    - name: Ensure that the swap file entry is in /etc/fstab
      mount:
        name: none
        src: /openstack/swap.img
        fstype: swap
        opts: sw
        passno: 0
        dump: 0
        state: present
      tags:
        - swap-fstab

    - name: Bring swap file online
      command: swapon /openstack/swap.img
      tags:
        - swap-online

- name: Set system swappiness
  sysctl:
    name: vm.swappiness
    value: 10
    state: present
  tags:
    - swap-sysctl