813 lines
28 KiB
Python
813 lines
28 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2016, Hiroaki Nakamura <hnakamur@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = """
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---
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module: lxd_container
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short_description: Manage LXD Containers
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version_added: 2.2.0
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description:
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- Management of LXD containers
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author: "Hiroaki Nakamura (@hnakamur)"
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options:
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name:
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description:
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- Name of a container.
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required: true
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type:
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choices:
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- container
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- profile
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description:
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- The resource type.
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required: false
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default: container
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architecture:
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description:
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- The archiecture for the container (e.g. "x86_64" or "i686").
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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required: false
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config:
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description:
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- >
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The config for the container (e.g. {"limits.cpu": "2"}).
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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- If the container already exists and its "config" value in metadata
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obtained from
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GET /1.0/containers/<name>
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https://github.com/lxc/lxd/blob/master/doc/rest-api.md#10containersname
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are different, they this module tries to apply the configurations.
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- The key starts with 'volatile.' are ignored for this comparison.
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- Not all config values are supported to apply the existing container.
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Maybe you need to delete and recreate a container.
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required: false
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devices:
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description:
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- >
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The devices for the container
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(e.g. { "rootfs": { "path": "/dev/kvm", "type": "unix-char" }).
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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required: false
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ephemeral:
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description:
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- Whether or not the container is ephemeral (e.g. true or false).
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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required: false
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source:
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description:
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- >
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The source for the container
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(e.g. { "type": "image",
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"mode": "pull",
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"server": "https://images.linuxcontainers.org",
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"protocol": "lxd",
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"alias": "ubuntu/xenial/amd64" }).
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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required: false
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new_name:
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description:
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- A new name of a profile.
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- If this parameter is specified a profile will be renamed to this name.
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required: false
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state:
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choices:
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- present
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- started
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- stopped
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- restarted
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- absent
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- frozen
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description:
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- Define the state of a container or profile.
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- Valid choices for type=container are started, stopped, restarted,
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absent, or frozen.
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- Valid choices for type=profile are present or absent.
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required: false
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default: started
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timeout:
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description:
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- A timeout of one LXC REST API call.
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- This is also used as a timeout for waiting until IPv4 addresses
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are set to the all network interfaces in the container after
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starting or restarting.
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required: false
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default: 30
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wait_for_ipv4_addresses:
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description:
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- If this is true, the lxd_module waits until IPv4 addresses
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are set to the all network interfaces in the container after
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starting or restarting.
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required: false
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default: false
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force_stop:
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description:
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- If this is true, the lxd_module forces to stop the container
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when it stops or restarts the container.
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required: false
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default: false
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unix_socket_path:
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description:
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- The unix domain socket path for the LXD server.
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required: false
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default: /var/lib/lxd/unix.socket
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url:
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description:
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- The https URL for the LXD server.
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- If url is set, this module connects to the LXD server via https.
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If url it not set, this module connects to the LXD server via
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unix domain socket specified with unix_socket_path.
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key_file:
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description:
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- The client certificate key file path.
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required: false
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default: >
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'{}/.config/lxc/client.key'.format(os.environ['HOME'])
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cert_file:
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description:
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- The client certificate file path.
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required: false
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default: >
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'{}/.config/lxc/client.crt'.format(os.environ['HOME'])
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trust_password:
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description:
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- The client trusted password.
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- You need to set this password on the LXD server before
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running this module using the following command.
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lxc config set core.trust_password <some random password>
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See https://www.stgraber.org/2016/04/18/lxd-api-direct-interaction/
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- If trust_password is set, this module send a request for
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authentication before sending any requests.
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required: false
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notes:
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- Containers must have a unique name. If you attempt to create a container
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with a name that already existed in the users namespace the module will
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simply return as "unchanged".
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- There are two ways to can run commands in containers, using the command
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module or using the ansible lxd connection plugin bundled in Ansible >=
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2.1, the later requires python to be installed in the container which can
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be done with the command module.
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- You can copy a file from the host to the container
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with the Ansible `copy` and `template` module and the `lxd` connection plugin.
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See the example below.
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- You can copy a file in the creatd container to the localhost
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with `command=lxc file pull container_name/dir/filename filename`.
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See the first example below.
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"""
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EXAMPLES = """
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- hosts: localhost
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connection: local
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tasks:
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- name: Create a started container
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lxd_container:
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name: mycontainer
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state: started
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source:
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type: image
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mode: pull
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server: https://images.linuxcontainers.org
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protocol: lxd
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alias: "ubuntu/xenial/amd64"
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profiles: ["default"]
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- name: Install python in the created container "mycontainer"
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command: lxc exec mycontainer -- apt install -y python
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- name: Copy /etc/hosts in the created container "mycontainer" to localhost with name "mycontainer-hosts"
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command: lxc file pull mycontainer/etc/hosts mycontainer-hosts
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# Note your container must be in the inventory for the below example.
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#
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# [containers]
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# mycontainer ansible_connection=lxd
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#
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- hosts:
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- mycontainer
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tasks:
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- template: src=foo.j2 dest=/etc/bar
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- hosts: localhost
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connection: local
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tasks:
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- name: Create a stopped container
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lxd_container:
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name: mycontainer
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state: stopped
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source:
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type: image
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mode: pull
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server: https://images.linuxcontainers.org
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protocol: lxd
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alias: "ubuntu/xenial/amd64"
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profiles: ["default"]
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- hosts: localhost
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connection: local
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tasks:
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- name: Restart a container
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lxd_container:
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name: mycontainer
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state: restarted
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source:
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type: image
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mode: pull
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server: https://images.linuxcontainers.org
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protocol: lxd
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alias: "ubuntu/xenial/amd64"
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profiles: ["default"]
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# An example for connecting to the LXD server using https
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- hosts: localhost
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connection: local
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tasks:
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- name: create macvlan profile
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lxd_container:
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url: https://127.0.0.1:8443
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# These cert_file and key_file values are equal to the default values.
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#cert_file: "{{ lookup('env', 'HOME') }}/.config/lxc/client.crt"
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#key_file: "{{ lookup('env', 'HOME') }}/.config/lxc/client.key"
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trust_password: mypassword
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type: profile
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name: macvlan
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state: present
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config: {}
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description: 'my macvlan profile'
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devices:
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eth0:
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nictype: macvlan
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parent: br0
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type: nic
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"""
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RETURN="""
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lxd_container:
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description: container information
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returned: success
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type: object
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contains:
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addresses:
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description: mapping from the network device name to a list of IPv4 addresses in the container
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returned: when state is started or restarted
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type: object
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sample: {"eth0": ["10.155.92.191"]}
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old_state:
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description: the old state of the container
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returned: when state is started or restarted
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sample: "stopped"
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logs:
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descriptions: the logs of requests and responses
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returned: when requests are sent
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actions:
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description: list of actions performed for the container
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returned: success
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type: list
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sample: ["create", "start"]
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"""
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import os
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try:
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import json
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except ImportError:
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import simplejson as json
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# httplib/http.client connection using unix domain socket
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import socket
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import ssl
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try:
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from httplib import HTTPConnection, HTTPSConnection
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except ImportError:
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# Python 3
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from http.client import HTTPConnection, HTTPSConnection
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class UnixHTTPConnection(HTTPConnection):
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def __init__(self, path, timeout=None):
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HTTPConnection.__init__(self, 'localhost', timeout=timeout)
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self.path = path
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def connect(self):
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sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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sock.connect(self.path)
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self.sock = sock
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from ansible.module_utils.urls import generic_urlparse
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try:
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from urlparse import urlparse
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except ImportError:
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# Python 3
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from url.parse import urlparse
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# LXD_ANSIBLE_STATES is a map of states that contain values of methods used
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# when a particular state is evoked.
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LXD_ANSIBLE_STATES = {
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'present': '', # TODO: Separate state for profile
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'started': '_started',
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'stopped': '_stopped',
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'restarted': '_restarted',
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'absent': '_destroyed',
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'frozen': '_frozen'
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}
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# ANSIBLE_LXD_STATES is a map of states of lxd containers to the Ansible
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# lxc_container module state parameter value.
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ANSIBLE_LXD_STATES = {
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'Running': 'started',
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'Stopped': 'stopped',
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'Frozen': 'frozen',
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}
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# CONFIG_PARAMS is a map from a resource type to config attribute names.
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CONFIG_PARAMS = {
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'container': ['architecture', 'config', 'devices', 'ephemeral', 'profiles', 'source'],
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'profile': ['config', 'description', 'devices']
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}
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try:
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callable(all)
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except NameError:
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# For python <2.5
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# This definition is copied from https://docs.python.org/2/library/functions.html#all
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def all(iterable):
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for element in iterable:
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if not element:
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return False
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return True
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class LxdContainerManagement(object):
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def __init__(self, module):
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"""Management of LXC containers via Ansible.
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:param module: Processed Ansible Module.
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:type module: ``object``
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"""
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self.module = module
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self.name = self.module.params['name']
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self.type = self.module.params['type']
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self._build_config()
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# TODO: check state value according to type
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self.state = self.module.params['state']
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self.new_name = self.module.params.get('new_name', None)
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self.timeout = self.module.params['timeout']
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self.wait_for_ipv4_addresses = self.module.params['wait_for_ipv4_addresses']
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self.force_stop = self.module.params['force_stop']
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self.addresses = None
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self.unix_socket_path = self.module.params['unix_socket_path']
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self.url = self.module.params.get('url', None)
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self.key_file = self.module.params.get('key_file', None)
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self.cert_file = self.module.params.get('cert_file', None)
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self.trust_password = self.module.params.get('trust_password', None)
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if self.url is None:
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self.connection = UnixHTTPConnection(self.unix_socket_path, timeout=self.timeout)
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else:
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parts = generic_urlparse(urlparse(self.url))
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ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
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ctx.load_cert_chain(self.cert_file, keyfile=self.key_file)
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self.connection = HTTPSConnection(parts.get('netloc'), context=ctx, timeout=self.timeout)
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self.logs = []
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self.actions = []
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def _build_config(self):
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self.config = {}
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for attr in CONFIG_PARAMS[self.type]:
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param_val = self.module.params.get(attr, None)
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if param_val is not None:
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self.config[attr] = param_val
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def _authenticate(self):
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body_json = {'type': 'client', 'password': self.trust_password}
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self._send_request('POST', '/1.0/certificates', body_json=body_json)
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def _send_request(self, method, url, body_json=None, ok_error_codes=None):
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try:
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body = json.dumps(body_json)
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self.connection.request(method, url, body=body)
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resp = self.connection.getresponse()
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resp_json = json.loads(resp.read())
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self.logs.append({
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'type': 'sent request',
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'request': {'method': method, 'url': url, 'json': body_json, 'timeout': self.timeout},
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'response': {'json': resp_json}
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})
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resp_type = resp_json.get('type', None)
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if resp_type == 'error':
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if ok_error_codes is not None and resp_json['error_code'] in ok_error_codes:
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return resp_json
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self.module.fail_json(
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msg='error response',
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request={'method': method, 'url': url, 'json': body_json, 'timeout': self.timeout},
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response={'json': resp_json},
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logs=self.logs
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)
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return resp_json
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except socket.error as e:
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if self.url is None:
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self.module.fail_json(
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msg='cannot connect to the LXD server',
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unix_socket_path=self.unix_socket_path, error=e
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)
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else:
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self.module.fail_json(
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msg='cannot connect to the LXD server',
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url=self.url, key_file=self.key_file, cert_file=self.cert_file,
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error=e
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)
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def _operate_and_wait(self, method, path, body_json=None):
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resp_json = self._send_request(method, path, body_json=body_json)
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if resp_json['type'] == 'async':
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url = '{0}/wait?timeout={1}'.format(resp_json['operation'], self.timeout)
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resp_json = self._send_request('GET', url)
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if resp_json['metadata']['status'] != 'Success':
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self.module.fail_json(
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msg='error response for waiting opearation',
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request={'method': method, 'url': url, 'timeout': self.timeout},
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response={'json': resp_json},
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logs=self.logs
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)
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return resp_json
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def _get_container_json(self):
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return self._send_request(
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'GET', '/1.0/containers/{0}'.format(self.name),
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ok_error_codes=[404]
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)
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def _get_container_state_json(self):
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return self._send_request(
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'GET', '/1.0/containers/{0}/state'.format(self.name),
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ok_error_codes=[404]
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)
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@staticmethod
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def _container_json_to_module_state(resp_json):
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if resp_json['type'] == 'error':
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return 'absent'
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return ANSIBLE_LXD_STATES[resp_json['metadata']['status']]
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def _change_state(self, action, force_stop=False):
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body_json={'action': action, 'timeout': self.timeout}
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if force_stop:
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body_json['force'] = True
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return self._operate_and_wait('PUT', '/1.0/containers/{0}/state'.format(self.name), body_json=body_json)
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def _create_container(self):
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config = self.config.copy()
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config['name'] = self.name
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self._operate_and_wait('POST', '/1.0/containers', config)
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self.actions.append('create')
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def _start_container(self):
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self._change_state('start')
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self.actions.append('start')
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def _stop_container(self):
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self._change_state('stop', self.force_stop)
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self.actions.append('stop')
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def _restart_container(self):
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self._change_state('restart', self.force_stop)
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self.actions.append('restart')
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def _delete_container(self):
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return self._operate_and_wait('DELETE', '/1.0/containers/{0}'.format(self.name))
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self.actions.append('delete')
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def _freeze_container(self):
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self._change_state('freeze')
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self.actions.append('freeze')
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def _unfreeze_container(self):
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self._change_state('unfreeze')
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self.actions.append('unfreez')
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def _container_ipv4_addresses(self, ignore_devices=['lo']):
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resp_json = self._get_container_state_json()
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network = resp_json['metadata']['network'] or {}
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network = dict((k, v) for k, v in network.items() if k not in ignore_devices) or {}
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addresses = dict((k, [a['address'] for a in v['addresses'] if a['family'] == 'inet']) for k, v in network.items()) or {}
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return addresses
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@staticmethod
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def _has_all_ipv4_addresses(addresses):
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return len(addresses) > 0 and all([len(v) > 0 for v in addresses.itervalues()])
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|
|
|
def _get_addresses(self):
|
|
due = datetime.datetime.now() + datetime.timedelta(seconds=self.timeout)
|
|
while datetime.datetime.now() < due:
|
|
time.sleep(1)
|
|
addresses = self._container_ipv4_addresses()
|
|
if self._has_all_ipv4_addresses(addresses):
|
|
self.addresses = addresses
|
|
return
|
|
|
|
state_changed = len(self.actions) > 0
|
|
self.module.fail_json(
|
|
failed=True,
|
|
msg='timeout for getting IPv4 addresses',
|
|
changed=state_changed,
|
|
actions=self.actions,
|
|
logs=self.logs)
|
|
|
|
def _started(self):
|
|
if self.old_state == 'absent':
|
|
self._create_container()
|
|
self._start_container()
|
|
else:
|
|
if self.old_state == 'frozen':
|
|
self._unfreeze_container()
|
|
elif self.old_state == 'stopped':
|
|
self._start_container()
|
|
if self._needs_to_apply_container_configs():
|
|
self._apply_container_configs()
|
|
if self.wait_for_ipv4_addresses:
|
|
self._get_addresses()
|
|
|
|
def _stopped(self):
|
|
if self.old_state == 'absent':
|
|
self._create_container()
|
|
else:
|
|
if self.old_state == 'stopped':
|
|
if self._needs_to_apply_container_configs():
|
|
self._start_container()
|
|
self._apply_container_configs()
|
|
self._stop_container()
|
|
else:
|
|
if self.old_state == 'frozen':
|
|
self._unfreeze_container()
|
|
if self._needs_to_apply_container_configs():
|
|
self._apply_container_configs()
|
|
self._stop_container()
|
|
|
|
def _restarted(self):
|
|
if self.old_state == 'absent':
|
|
self._create_container()
|
|
self._start_container()
|
|
else:
|
|
if self.old_state == 'frozen':
|
|
self._unfreeze_container()
|
|
if self._needs_to_apply_container_configs():
|
|
self._apply_container_configs()
|
|
self._restart_container()
|
|
if self.wait_for_ipv4_addresses:
|
|
self._get_addresses()
|
|
|
|
def _destroyed(self):
|
|
if self.old_state != 'absent':
|
|
if self.old_state == 'frozen':
|
|
self._unfreeze_container()
|
|
self._stop_container()
|
|
self._delete_container()
|
|
|
|
def _frozen(self):
|
|
if self.old_state == 'absent':
|
|
self._create_container()
|
|
self._start_container()
|
|
self._freeze_container()
|
|
else:
|
|
if self.old_state == 'stopped':
|
|
self._start_container()
|
|
if self._needs_to_apply_container_configs():
|
|
self._apply_container_configs()
|
|
self._freeze_container()
|
|
|
|
def _needs_to_change_container_config(self, key):
|
|
if key not in self.config:
|
|
return False
|
|
if key == 'config':
|
|
old_configs = dict((k, v) for k, v in self.old_container_json['metadata'][key].items() if not k.startswith('volatile.'))
|
|
else:
|
|
old_configs = self.old_container_json['metadata'][key]
|
|
return self.config[key] != old_configs
|
|
|
|
def _needs_to_apply_container_configs(self):
|
|
return (
|
|
self._needs_to_change_container_config('architecture') or
|
|
self._needs_to_change_container_config('config') or
|
|
self._needs_to_change_container_config('ephemeral') or
|
|
self._needs_to_change_container_config('devices') or
|
|
self._needs_to_change_container_config('profiles')
|
|
)
|
|
|
|
def _apply_container_configs(self):
|
|
old_metadata = self.old_container_json['metadata']
|
|
body_json = {
|
|
'architecture': old_metadata['architecture'],
|
|
'config': old_metadata['config'],
|
|
'devices': old_metadata['devices'],
|
|
'profiles': old_metadata['profiles']
|
|
}
|
|
if self._needs_to_change_container_config('architecture'):
|
|
body_json['architecture'] = self.config['architecture']
|
|
if self._needs_to_change_container_config('config'):
|
|
for k, v in self.config['config'].items():
|
|
body_json['config'][k] = v
|
|
if self._needs_to_change_container_config('ephemeral'):
|
|
body_json['ephemeral'] = self.config['ephemeral']
|
|
if self._needs_to_change_container_config('devices'):
|
|
body_json['devices'] = self.config['devices']
|
|
if self._needs_to_change_container_config('profiles'):
|
|
body_json['profiles'] = self.config['profiles']
|
|
self._operate_and_wait('PUT', '/1.0/containers/{0}'.format(self.name), body_json=body_json)
|
|
self.actions.append('apply_container_configs')
|
|
|
|
def _get_profile_json(self):
|
|
return self._send_request(
|
|
'GET', '/1.0/profiles/{0}'.format(self.name),
|
|
ok_error_codes=[404]
|
|
)
|
|
|
|
@staticmethod
|
|
def _profile_json_to_module_state(resp_json):
|
|
if resp_json['type'] == 'error':
|
|
return 'absent'
|
|
return 'present'
|
|
|
|
def _update_profile(self):
|
|
if self.state == 'present':
|
|
if self.old_state == 'absent':
|
|
if self.new_name is None:
|
|
self._create_profile()
|
|
else:
|
|
self.module.fail_json(
|
|
failed=True,
|
|
msg='new_name must not be set when the profile does not exist and the specified state is present',
|
|
changed=False)
|
|
else:
|
|
if self.new_name is not None and self.new_name != self.name:
|
|
self._rename_profile()
|
|
if self._needs_to_apply_profile_configs():
|
|
self._apply_profile_configs()
|
|
elif self.state == 'absent':
|
|
if self.old_state == 'present':
|
|
if self.new_name is None:
|
|
self._delete_profile()
|
|
else:
|
|
self.module.fail_json(
|
|
failed=True,
|
|
msg='new_name must not be set when the profile exists and the specified state is absent',
|
|
changed=False)
|
|
|
|
def _create_profile(self):
|
|
config = self.config.copy()
|
|
config['name'] = self.name
|
|
self._send_request('POST', '/1.0/profiles', config)
|
|
self.actions.append('create')
|
|
|
|
def _rename_profile(self):
|
|
config = {'name': self.new_name}
|
|
self._send_request('POST', '/1.0/profiles/{}'.format(self.name), config)
|
|
self.actions.append('rename')
|
|
self.name = self.new_name
|
|
|
|
def _needs_to_change_profile_config(self, key):
|
|
if key not in self.config:
|
|
return False
|
|
old_configs = self.old_profile_json['metadata'].get(key, None)
|
|
return self.config[key] != old_configs
|
|
|
|
def _needs_to_apply_profile_configs(self):
|
|
return (
|
|
self._needs_to_change_profile_config('config') or
|
|
self._needs_to_change_profile_config('description') or
|
|
self._needs_to_change_profile_config('devices')
|
|
)
|
|
|
|
def _apply_profile_configs(self):
|
|
config = self.old_profile_json.copy()
|
|
for k, v in self.config.iteritems():
|
|
config[k] = v
|
|
self._send_request('PUT', '/1.0/profiles/{}'.format(self.name), config)
|
|
self.actions.append('apply_profile_configs')
|
|
|
|
def _delete_profile(self):
|
|
self._send_request('DELETE', '/1.0/profiles/{}'.format(self.name))
|
|
self.actions.append('delete')
|
|
|
|
def run(self):
|
|
"""Run the main method."""
|
|
|
|
if self.trust_password is not None:
|
|
self._authenticate()
|
|
|
|
if self.type == 'container':
|
|
self.old_container_json = self._get_container_json()
|
|
self.old_state = self._container_json_to_module_state(self.old_container_json)
|
|
action = getattr(self, LXD_ANSIBLE_STATES[self.state])
|
|
action()
|
|
elif self.type == 'profile':
|
|
self.old_profile_json = self._get_profile_json()
|
|
self.old_state = self._profile_json_to_module_state(self.old_profile_json)
|
|
self._update_profile()
|
|
|
|
state_changed = len(self.actions) > 0
|
|
result_json = {
|
|
'changed': state_changed,
|
|
'old_state': self.old_state,
|
|
'logs': self.logs,
|
|
'actions': self.actions
|
|
}
|
|
if self.addresses is not None:
|
|
result_json['addresses'] = self.addresses
|
|
self.module.exit_json(**result_json)
|
|
|
|
|
|
def main():
|
|
"""Ansible Main module."""
|
|
|
|
module = AnsibleModule(
|
|
argument_spec=dict(
|
|
name=dict(
|
|
type='str',
|
|
required=True
|
|
),
|
|
new_name=dict(
|
|
type='str',
|
|
),
|
|
type=dict(
|
|
type='str',
|
|
choices=CONFIG_PARAMS.keys(),
|
|
default='container'
|
|
),
|
|
architecture=dict(
|
|
type='str',
|
|
),
|
|
config=dict(
|
|
type='dict',
|
|
),
|
|
description=dict(
|
|
type='str',
|
|
),
|
|
devices=dict(
|
|
type='dict',
|
|
),
|
|
ephemeral=dict(
|
|
type='bool',
|
|
),
|
|
profiles=dict(
|
|
type='list',
|
|
),
|
|
source=dict(
|
|
type='dict',
|
|
),
|
|
state=dict(
|
|
choices=LXD_ANSIBLE_STATES.keys(),
|
|
default='started'
|
|
),
|
|
timeout=dict(
|
|
type='int',
|
|
default=30
|
|
),
|
|
wait_for_ipv4_addresses=dict(
|
|
type='bool',
|
|
default=False
|
|
),
|
|
force_stop=dict(
|
|
type='bool',
|
|
default=False
|
|
),
|
|
unix_socket_path=dict(
|
|
type='str',
|
|
default='/var/lib/lxd/unix.socket'
|
|
),
|
|
url=dict(
|
|
type='str',
|
|
),
|
|
key_file=dict(
|
|
type='str',
|
|
default='{}/.config/lxc/client.key'.format(os.environ['HOME'])
|
|
),
|
|
cert_file=dict(
|
|
type='str',
|
|
default='{}/.config/lxc/client.crt'.format(os.environ['HOME'])
|
|
),
|
|
trust_password=dict(
|
|
type='str',
|
|
)
|
|
),
|
|
supports_check_mode=False,
|
|
)
|
|
|
|
lxd_manage = LxdContainerManagement(module=module)
|
|
lxd_manage.run()
|
|
|
|
# import module bits
|
|
from ansible.module_utils.basic import *
|
|
if __name__ == '__main__':
|
|
main()
|