---
# Copyright 2017, 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.

- name: Check machinectl mount point
  command: mountpoint /var/lib/machines
  failed_when: false
  changed_when: false
  register: machinectl_mount

- name: Create systemd sparse file
  block:
    - name: Set volume size
      shell: machinectl set-limit {{ nspawn_host_machine_volume_size }}
      changed_when: false
      register: machines_create
      args:
        executable: /bin/bash
  rescue:
    - name: Create volume file (fallback)
      shell: |
        truncate -s '>{{ nspawn_host_machine_volume_size }}' /var/lib/machines.raw
      register: machines_create
      args:
        executable: /bin/bash

- name: Disable the machinectl quota system
  block:
    - name: Disable the machinectl quota system
      command: "btrfs quota {{ nspawn_host_machine_quota_disabled | bool | ternary('disable', 'enabled') }} /var/lib/machines"
      changed_when: false
      register: machines_create
      args:
        executable: /bin/bash
  rescue:
    - name: Notice quota system was not disabled
      debug:
        msg: >-
          The machinectl quota system could not be disabled. This typically
           means it is already off or not available on the system.

- name: Systemd machinectl mount
  block:
    - name: Format the machines sparse file
      filesystem:
        fstype: btrfs
        dev: /var/lib/machines.raw

    - name: Create machines mount point
      file:
        path: "/var/lib/machines"
        state: "directory"
        recurse: true

    - name: Move machines mount into place
      copy:
        src: var-lib-machines.mount
        dest: /etc/systemd/system/var-lib-machines.mount
      register: mount_unit
      notify:
        - Reload systemd units
        - Restart machines mount

    - name: Move machined service into place
      copy:
        src: systemd-machined.service
        dest: /etc/systemd/system/systemd-machined.service
      register: machined_unit
      notify:
        - Reload systemd units
        - Restart machined
  when:
    - machinectl_mount.rc != 0

- meta: flush_handlers

# NOTE(cloudnull): Because the machines mount may be a manually created sparse
#                  file we run an online resize to ensure the machines mount is
#                  the size we expect.
- name: Ensure the machines fs is sized correctly
  command: "btrfs filesystem resize max /var/lib/machines"
  changed_when: false
  failed_when: false
  when:
    - machines_create | changed