openstack-ansible/playbooks/common-tasks/os-lxc-container-setup.yml
Jesse Pretorius 06269c1884 Use wait_for_connection instead of wait_for to check container
After creating the container or configuring the bind mounts for
the container, we used a task to wait for SSH to respond on the
container, using the Ansible wait_for module trying to connect to
port 22.

When managing containers in Ansible using other connection plugins
that use LXC commands on the physical host to execute modules,
there may not be an SSH daemon running within the container. In
these situations we can accomplish the same check without SSH by
using the wait_for_connection module (new in ansible 2.3) to verify
that Ansible has a working execution path into the container, but
not necessarily via SSH.

Change-Id: I1399b6727ec8894dd3b9c464f6addbeea1c1f4f9
2017-04-28 13:17:51 +01:00

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4.9 KiB
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---
# 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 (bind var/log)
set_fact:
lxc_default_bind_mounts: '{{ lxc_default_bind_mounts | default([{"bind_dir_path": "/var/log", "mount_path": "/openstack/log/{{ inventory_hostname }}"}]) }}'
when:
- default_bind_mount_logs | bool
tags:
- common-lxc
- name: Ensure mount directories exists
file:
path: "{{ item['mount_path'] }}"
state: "directory"
with_items:
- "{{ lxc_default_bind_mounts | default([]) }}"
- "{{ list_of_bind_mounts | default([]) }}"
delegate_to: "{{ physical_host }}"
when:
- not is_metal | bool
tags:
- common-lxc
- 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,create=dir 0 0"
backup: "true"
with_items:
- "{{ lxc_default_bind_mounts | default([]) }}"
- "{{ list_of_bind_mounts | default([]) }}"
delegate_to: "{{ physical_host }}"
when:
- not is_metal | bool
register: _mc
tags:
- common-lxc
- 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 | default([]) }}"
delegate_to: "{{ physical_host }}"
register: _ec
when: not is_metal | bool
tags:
- common-lxc
- name: Extra lxc config no restart
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_no_restart | default([]) }}"
delegate_to: "{{ physical_host }}"
when: not is_metal | bool
tags:
- common-lxc
# 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)
tags:
- common-lxc
# 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)
tags:
- common-lxc
- name: Wait for container connectivity
wait_for_connection:
connect_timeout: "{{ lxc_container_wait_params.connect_timeout | default(omit) }}"
delay: "{{ lxc_container_wait_params.delay | default(omit) }}"
sleep: "{{ lxc_container_wait_params.sleep | default(omit) }}"
timeout: "{{ lxc_container_wait_params.timeout | default(omit) }}"
when:
- (_mc is defined and _mc | changed) or (_ec is defined and _ec | changed)
- not is_metal | bool
tags:
- common-lxc