---
# 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.


# NOTE(cloudnull): This is only used when running SystemD <= 219
# ==============================================================
#  In later versions of SystemD this is automatically done for us
#  by the machinectl cli on first run.
- name : Create volume
  shell: |
    if [[ "$(ls -lh /var/lib/machines.raw | awk '{print $5}')" != "{{ lxc_host_machine_volume_size }}.0G" ]]; then
      if [[ ! -f "/var/lib/machines.raw" ]]; then
        truncate -s {{ lxc_host_machine_volume_size }}G /var/lib/machines.raw
        exit 3
      fi
    fi
  register: machines_create
  changed_when: machines_create.rc == 3
  failed_when: machines_create.rc not in [0, 3]
  args:
    executable: /bin/bash
  when:
    - lxc_image_cache_refresh | bool

# In later versions of SystemD this is automatically done for us
#  by the machinectl cli on first run.
- name: Format the machines file
  filesystem:
    fstype: btrfs
    dev: /var/lib/machines.raw
  when:
    - machines_create | changed

# In later versions of SystemD this is automatically done for us
#  by the machinectl cli on first run.
- name: Create machines mount point
  file:
    path: "/var/lib/machines"
    state: "directory"
    recurse: true

# In later versions of SystemD this unit file has been corrected
#  and is packaged with systemd proper.
- name: Move machines mount into place
  copy:
    src: var-lib-machines.mount
    dest: /etc/systemd/system/var-lib-machines.mount
  register: mount_unit
  when:
    - machines_create | changed

# In later versions of SystemD this is not needed. Referenced in
#  the following ML post resolves the bug.
#  * https://lists.freedesktop.org/archives/systemd-devel/2015-March/029151.html
- name: Move machined service into place
  template:
    src: systemd-machined.service.j2
    dest: /etc/systemd/system/systemd-machined.service
  register: machined_unit
  when:
    - machines_create | changed

# In later versions of SystemD this is not needed. Referenced in
#  the following commit resolves the bug.
#  * https://cgit.freedesktop.org/systemd/systemd/commit/src/machine/org.freedesktop.machine1.conf?id=72c3897f77a7352618ea76b880a6764f52d6327b
- name: Move machine1 dbus config into place
  copy:
    src: org.freedesktop.machine1.conf
    dest: /etc/dbus-1/system.d/org.freedesktop.machine1.conf
  register: machine1_conf
  when:
    - machines_create | changed

- name: Reload the System daemon
  command: "systemctl daemon-reload"
  when: >
    mount_unit | changed or
    machined_unit | changed or
    machine1_conf | changed

- name: Restart dbus
  command: "systemctl reload dbus.service"
  when:
    - machine1_conf | changed

# Ignore the Ansible warning here about using 'mount' via the shell module
# instead of using the mount Ansible module.
- name: Mount all
  shell: "mount | grep '/var/lib/machines' || (systemctl start var-lib-machines.mount && exit 3)"
  args:
    warn: no
  register: mount_machines
  changed_when: mount_machines.rc == 3
  failed_when: mount_machines.rc not in [0, 3]
  tags:
    - skip_ansible_lint

- name: Restart machined
  command: "systemctl restart systemd-machined.service"
  when:
    - machined_unit | changed

# Because of this post and it's related bug(s) this is adding the container
#  volumes the old way. The new way would simply be calling `machinectl`.
#  * https://www.mail-archive.com/systemd-devel@lists.freedesktop.org/msg28255.html
- name : Remove old image cache
  command: "btrfs subvolume delete /var/lib/machines/{{ lxc_container_base_name }}"
  register: cache_refresh_del
  changed_when: cache_refresh_del.rc == 0
  failed_when: cache_refresh_del.rc not in [0, 1]
  when:
    - lxc_image_cache_refresh | bool

- name : Add image cache
  command: "btrfs subvolume create /var/lib/machines/{{ lxc_container_base_name }}"
  register: cache_refresh_add
  changed_when: cache_refresh_add.rc == 0
  failed_when: cache_refresh_add.rc not in [0, 1]
  when:
    - lxc_image_cache_refresh | bool

- name: Retrieve base image
  get_url:
    url: "{{ lxc_image_cache_server }}{{ item.split(';')[-1] }}rootfs.tar.xz"
    dest: "/tmp/rootfs.tar.xz"
  register: pull_image
  until: pull_image | success
  retries: 5
  delay: 2
  with_items: "{{ lxc_images }}"

- name: Place container rootfs
  unarchive:
    src: "/tmp/rootfs.tar.xz"
    dest: "/var/lib/machines/{{ lxc_container_base_name }}"
    remote_src: True

- name: Remove rootfs archive
  file:
    path: "/tmp/rootfs.tar.xz"
    state: "absent"