openstack-ansible-nspawn_hosts/tasks/nspawn_cache.yml

---
# Copyright 2018, 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: Remove old image cache
  command: "btrfs subvolume delete /var/lib/machines/{{ nspawn_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:
    - nspawn_image_cache_refresh | bool

- name: Add image cache
  command: "btrfs subvolume create /var/lib/machines/{{ nspawn_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:
    - nspawn_image_cache_refresh | bool

- name: Set the qgroup limits
  block:
    - name: Set the qgroup size|compression limits on machines
      command: "btrfs qgroup limit {{ item }} /var/lib/machines/{{ nspawn_container_base_name }}"
      changed_when: false
      with_items:
        - "-e {{ nspawn_host_qgroup_space_limit }}"
        - "-c {{ nspawn_host_qgroup_compression_limit }}"
      when:
        - not nspawn_host_machine_quota_disabled
  rescue:
    - name: Notice regarding quota system
      debug:
        msg: >-
          There was an error processing the setup of qgroups. Check the system
          to ensure they're available otherwise disable the quota system by
          setting `nspawn_host_machine_quota_disabled` to true.          

- name: Ensure image has been pre-staged
  async_status:
    jid: "{{ prestage_image.ansible_job_id }}"
  register: job_result
  until: job_result.finished
  retries: 60
  when:
    - nspawn_image_cache_refresh | bool

- name: Place container rootfs
  unarchive:
    src: "/tmp/{{ cache_basename }}"
    dest: "/var/lib/machines/{{ nspawn_container_base_name }}"
    remote_src: True
  notify:
    - Remove rootfs archive
  when:
    - nspawn_image_cache_refresh | bool

- name: Cached image preparation script
  template:
    src: "prep-scripts/nspawn_{{ nspawn_cache_map.distro }}_prep.sh.j2"
    dest: "/var/lib/machines/{{ nspawn_container_base_name }}/usr/local/bin/cache-prep-commands.sh"
    mode: "0755"

# This task runs several commands against the cached image to speed up the
# nspawn_container_create playbook.
- name: Prepare cached image setup commands
  shell: "chroot /var/lib/machines/{{ nspawn_container_base_name }} /usr/local/bin/cache-prep-commands.sh > /var/log/nspawn-cache-prep-commands.log 2>&1"
  changed_when: false

- name: Sync files from the host into the container cache
  shell: |
    if [[ -e "{{ item }}" ]]; then
      rsync -av "{{ item }}" "/var/lib/machines/{{ nspawn_container_base_name }}{{ item }}"
    else
      exit 3
    fi    
  changed_when: _rsync_container_cache.rc == 0
  failed_when: _rsync_container_cache.rc not in [0, 3]
  register: _rsync_container_cache
  args:
    executable: "/bin/bash"
  with_items: "{{ (nspawn_copy_from_host | union(nspawn_container_cache_files_from_host)) | list }}"
  when:
    - nspawn_image_cache_refresh | bool

- name: Create networkd directory
  file:
    path: "/var/lib/machines/{{ nspawn_container_base_name }}/etc/systemd/network"
    state: directory

- name: Create static MACs in the container
  copy:
    src: "/etc/systemd/network/99-default.link"
    dest: "/var/lib/machines/{{ nspawn_container_base_name }}/etc/systemd/network/99-default.link"
    remote_src: true