openstack-ansible-lxc_hosts/tasks/lxc_cache_preparation_systemd_old.yml

---
# 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. To ensure we're handling the
#  case of a mount point being just offline, we first try and start
#  the systemd mount unit and then check for the mount points existance.
- name: Check machinectl mount point
  shell: |
    mount -a || true
    systemctl start var-lib-machines.mount || true
    sleep 1
    grep -w '/var/lib/machines' /proc/mounts    
  args:
    warn: no
  failed_when: false
  changed_when: false
  register: machinectl_mount
  tags:
    - skip_ansible_lint

# NOTE(odyssey4me):
# The size is forced to be set in Gigabytes to maintain compatibility
#  with the initial implementation done in Pike-Rocky. Do not change
#  this without implementing some way of converting any pre-existing
#  value properly during a major upgrade.
- name: Create systemd sparse file
  shell: |
    truncate -s '>{{ lxc_host_machine_volume_size | regex_replace("\D*$", "") }}G' /var/lib/machines.raw    

- name: Old systemd machinectl mount
  block:
    # In later versions of SystemD this is automatically done for us
    #  by the machinectl cli on first run.
    - name: Format the machines sparse file
      filesystem:
        fstype: btrfs
        dev: /var/lib/machines.raw

    # 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"

    # 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
      notify:
        - Start machines mount

    # 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
      notify:
        - Reload systemd units
        - Restart machined

    # 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
      notify:
        - Reload systemd units
        - Restart dbus
  when:
    - machinectl_mount.rc != 0

# Ensure lxc networks are running as they're supposed to
- 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

- name: Disable the machinectl quota system
  command: "btrfs quota {{ lxc_host_machine_quota_disabled | bool | ternary('disable', 'enable') }} /var/lib/machines"
  changed_when: false

# 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: Ensure image has been pre-staged
  async_status:
    jid: "{{ prestage_image.ansible_job_id }}"
  register: job_result
  until: job_result.finished
  retries: 60

- name: Place container rootfs
  unarchive:
    src: "/tmp/{{ cache_basename }}"
    dest: "/var/lib/machines/{{ lxc_container_base_name }}"
    remote_src: True
  notify:
    - Remove rootfs archive