openstack-ansible/playbooks/common-tasks/os-lxc-container-setup.yml

---
# Copyright 2016, 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.

# Usage:
#  This common task will update lxc containers to use the lxc-openstack
#  app-armor profile by default however this profile can be changed as needed.

#  This will also load in a list of bind mounts for a given container. To load
#  in a list of bind mounts the variable, "list_of_bind_mounts" must be used
#  containing at least one dictionary with the keys "bind_dir_path",
#  "relative_bind_dir_path", and "mount_path".
#    * bind_dir_path = Container path used in a bind mount
#    * mount_path = Local path on the physical host used for a bind mount

#  If extra container configurations are desirable set the
#  "extra_container_config" list to strings containing the options needed.

- name: Set default bind mounts
  set_fact:
    lxc_default_bind_mounts:
      - bind_dir_path: "/var/log"
        mount_path: "/openstack/log/{{ inventory_hostname }}"
  when: lxc_default_bind_mounts is undefined

- name: Ensure mount directories exists
  file:
    path: "{{ item['mount_path'] }}"
    state: "directory"
  with_items:
    - "{{ list_of_bind_mounts | default([]) }}"
    - "{{ lxc_default_bind_mounts }}"
  delegate_to: "{{ physical_host }}"
  when:
    - list_of_bind_mounts is defined
    - not is_metal | bool

- name: LXC bind mount directories
  lxc_container:
    name: "{{ inventory_hostname }}"
    container_command: |
      [[ ! -d "{{ item['bind_dir_path'] }}" ]] && mkdir -p "{{ item['bind_dir_path'] }}"      
  with_items:
    - "{{ list_of_bind_mounts | default([]) }}"
    - "{{ lxc_default_bind_mounts }}"
  delegate_to: "{{ physical_host }}"
  register: _bm
  when:
    - list_of_bind_mounts is defined
    - not is_metal | bool

- name: Add bind mount configuration to container
  lineinfile:
    dest: "/var/lib/lxc/{{ inventory_hostname }}/config"
    line: "lxc.mount.entry = {{ item['mount_path'] }} {{ item['bind_dir_path'].lstrip('/') }} none bind 0 0"
    backup: "true"
  with_items:
    - "{{ list_of_bind_mounts | default([]) }}"
    - "{{ lxc_default_bind_mounts }}"
  delegate_to: "{{ physical_host }}"
  when:
    - list_of_bind_mounts is defined
    - not is_metal | bool
  register: _mc

- name: Extra lxc config
  lineinfile:
    dest: "/var/lib/lxc/{{ inventory_hostname }}/config"
    line: "{{ item.split('=')[0] }} = {{ item.split('=', 1)[1] }}"
    insertafter: "^{{ item.split('=')[0] }}"
    backup: "true"
  with_items: "{{ extra_container_config }}"
  delegate_to: "{{ physical_host }}"
  register: _ec
  when:
    - extra_container_config is defined
    - not is_metal | bool

# Due to https://github.com/ansible/ansible-modules-extras/issues/2691
# this uses the LXC CLI tools to ensure that we get logging.
# TODO(odyssey4me): revisit this once the bug is fixed and released
- name: Lxc container restart
  command: >
    lxc-stop --name {{ inventory_hostname }}
    --logfile {{ lxc_container_log_path }}/lxc-{{ inventory_hostname }}.log
    --logpriority {{ (debug | bool) | ternary('DEBUG', 'INFO') }}    
  delegate_to: "{{ physical_host }}"
  register: container_stop
  until: container_stop | success
  retries: 3
  when:
    - not is_metal | bool
    - (_mc is defined and _mc | changed) or (_ec is defined and _ec | changed)

# Due to https://github.com/ansible/ansible-modules-extras/issues/2691
# this uses the LXC CLI tools to ensure that we get logging.
# TODO(odyssey4me): revisit this once the bug is fixed and released
- name: Start Container
  command: >
    lxc-start --daemon --name {{ inventory_hostname }}
    --logfile {{ lxc_container_log_path }}/lxc-{{ inventory_hostname }}.log
    --logpriority {{ (debug | bool) | ternary('DEBUG', 'INFO') }}    
  delegate_to: "{{ physical_host }}"
  register: container_start
  until: container_start | success
  retries: 3
  when:
    - not is_metal | bool
    - (_mc is defined and _mc | changed) or (_ec is defined and _ec | changed)

- name: Wait for container ssh
  wait_for:
    port: "22"
    delay: "{{ ssh_delay }}"
    search_regex: "OpenSSH"
    host: "{{ ansible_ssh_host }}"
  delegate_to: "{{ physical_host }}"
  register: ssh_wait_check
  until: ssh_wait_check | success
  retries: 3
  when:
    - (_bm is defined and _bm | changed) or (_ec is defined and _ec | changed)
    - not is_metal | bool