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community.general/plugins/modules/lxd_container.py
Simon Deziel 160e00e5b9
LXD moved to Canonical (#7332)
* plugins/inventory/lxd: update links to doc

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

* plugins/modules/lxd_container: update links to doc

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

* plugins/modules/lxd_profile: update links to doc

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

* plugins/modules/lxd_project: update links to doc

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

---------

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>
2023-10-04 19:48:54 +02:00

861 lines
30 KiB
Python

#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2016, Hiroaki Nakamura <hnakamur@gmail.com>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = '''
---
module: lxd_container
short_description: Manage LXD instances
description:
- Management of LXD containers and virtual machines.
author: "Hiroaki Nakamura (@hnakamur)"
extends_documentation_fragment:
- community.general.attributes
attributes:
check_mode:
support: full
version_added: 6.4.0
diff_mode:
support: full
version_added: 6.4.0
options:
name:
description:
- Name of an instance.
type: str
required: true
project:
description:
- 'Project of an instance.
See U(https://documentation.ubuntu.com/lxd/en/latest/projects/).'
required: false
type: str
version_added: 4.8.0
architecture:
description:
- 'The architecture for the instance (for example V(x86_64) or V(i686)).
See U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_get).'
type: str
required: false
config:
description:
- 'The config for the instance (for example V({"limits.cpu": "2"})).
See U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_get).'
- If the instance already exists and its "config" values in metadata
obtained from the LXD API U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_get)
are different, then this module tries to apply the configurations
U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_put).
- The keys starting with C(volatile.) are ignored for this comparison when O(ignore_volatile_options=true).
type: dict
required: false
ignore_volatile_options:
description:
- If set to V(true), options starting with C(volatile.) are ignored. As a result,
they are reapplied for each execution.
- This default behavior can be changed by setting this option to V(false).
- The default value changed from V(true) to V(false) in community.general 6.0.0.
type: bool
required: false
default: false
version_added: 3.7.0
profiles:
description:
- Profile to be used by the instance.
type: list
elements: str
devices:
description:
- 'The devices for the instance
(for example V({ "rootfs": { "path": "/dev/kvm", "type": "unix-char" }})).
See U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_get).'
type: dict
required: false
ephemeral:
description:
- Whether or not the instance is ephemeral (for example V(true) or V(false)).
See U(https://documentation.ubuntu.com/lxd/en/latest/api/#/instances/instance_get).
required: false
type: bool
source:
description:
- 'The source for the instance
(for example V({ "type": "image", "mode": "pull", "server": "https://images.linuxcontainers.org",
"protocol": "lxd", "alias": "ubuntu/xenial/amd64" })).'
- 'See U(https://documentation.ubuntu.com/lxd/en/latest/api/) for complete API documentation.'
- 'Note that C(protocol) accepts two choices: V(lxd) or V(simplestreams).'
required: false
type: dict
state:
choices:
- started
- stopped
- restarted
- absent
- frozen
description:
- Define the state of an instance.
required: false
default: started
type: str
target:
description:
- For cluster deployments. Will attempt to create an instance on a target node.
If the instance exists elsewhere in a cluster, then it will not be replaced or moved.
The name should respond to same name of the node you see in C(lxc cluster list).
type: str
required: false
version_added: 1.0.0
timeout:
description:
- A timeout for changing the state of the instance.
- This is also used as a timeout for waiting until IPv4 addresses
are set to the all network interfaces in the instance after
starting or restarting.
required: false
default: 30
type: int
type:
description:
- Instance type can be either V(virtual-machine) or V(container).
required: false
default: container
choices:
- container
- virtual-machine
type: str
version_added: 4.1.0
wait_for_ipv4_addresses:
description:
- If this is V(true), the C(lxd_container) waits until IPv4 addresses
are set to the all network interfaces in the instance after
starting or restarting.
required: false
default: false
type: bool
wait_for_container:
description:
- If set to V(true), the tasks will wait till the task reports a
success status when performing container operations.
default: false
type: bool
version_added: 4.4.0
force_stop:
description:
- If this is V(true), the C(lxd_container) forces to stop the instance
when it stops or restarts the instance.
required: false
default: false
type: bool
url:
description:
- The unix domain socket path or the https URL for the LXD server.
required: false
default: unix:/var/lib/lxd/unix.socket
type: str
snap_url:
description:
- The unix domain socket path when LXD is installed by snap package manager.
required: false
default: unix:/var/snap/lxd/common/lxd/unix.socket
type: str
client_key:
description:
- The client certificate key file path.
- If not specified, it defaults to C(${HOME}/.config/lxc/client.key).
required: false
aliases: [ key_file ]
type: path
client_cert:
description:
- The client certificate file path.
- If not specified, it defaults to C(${HOME}/.config/lxc/client.crt).
required: false
aliases: [ cert_file ]
type: path
trust_password:
description:
- The client trusted password.
- 'You need to set this password on the LXD server before
running this module using the following command:
C(lxc config set core.trust_password <some random password>).
See U(https://www.stgraber.org/2016/04/18/lxd-api-direct-interaction/).'
- If trust_password is set, this module send a request for
authentication before sending any requests.
required: false
type: str
notes:
- Instances can be a container or a virtual machine, both of them must have unique name. If you attempt to create an instance
with a name that already existed in the users namespace the module will
simply return as "unchanged".
- There are two ways to run commands inside a container or virtual machine, using the command
module or using the ansible lxd connection plugin bundled in Ansible >=
2.1, the later requires python to be installed in the instance which can
be done with the command module.
- You can copy a file from the host to the instance
with the Ansible M(ansible.builtin.copy) and M(ansible.builtin.template) module
and the P(community.general.lxd#connection) connection plugin.
See the example below.
- You can copy a file in the created instance to the localhost
with C(command=lxc file pull instance_name/dir/filename filename).
See the first example below.
'''
EXAMPLES = '''
# An example for creating a Ubuntu container and install python
- hosts: localhost
connection: local
tasks:
- name: Create a started container
community.general.lxd_container:
name: mycontainer
ignore_volatile_options: true
state: started
source:
type: image
mode: pull
server: https://images.linuxcontainers.org
protocol: lxd # if you get a 404, try setting protocol: simplestreams
alias: ubuntu/xenial/amd64
profiles: ["default"]
wait_for_ipv4_addresses: true
timeout: 600
- name: Check python is installed in container
delegate_to: mycontainer
ansible.builtin.raw: dpkg -s python
register: python_install_check
failed_when: python_install_check.rc not in [0, 1]
changed_when: false
- name: Install python in container
delegate_to: mycontainer
ansible.builtin.raw: apt-get install -y python
when: python_install_check.rc == 1
# An example for creating an Ubuntu 14.04 container using an image fingerprint.
# This requires changing 'server' and 'protocol' key values, replacing the
# 'alias' key with with 'fingerprint' and supplying an appropriate value that
# matches the container image you wish to use.
- hosts: localhost
connection: local
tasks:
- name: Create a started container
community.general.lxd_container:
name: mycontainer
ignore_volatile_options: true
state: started
source:
type: image
mode: pull
# Provides current (and older) Ubuntu images with listed fingerprints
server: https://cloud-images.ubuntu.com/releases
# Protocol used by 'ubuntu' remote (as shown by 'lxc remote list')
protocol: simplestreams
# This provides an Ubuntu 14.04 LTS amd64 image from 20150814.
fingerprint: e9a8bdfab6dc
profiles: ["default"]
wait_for_ipv4_addresses: true
timeout: 600
# An example for creating container in project other than default
- hosts: localhost
connection: local
tasks:
- name: Create a started container in project mytestproject
community.general.lxd_container:
name: mycontainer
project: mytestproject
ignore_volatile_options: true
state: started
source:
protocol: simplestreams
type: image
mode: pull
server: https://images.linuxcontainers.org
alias: ubuntu/20.04/cloud
profiles: ["default"]
wait_for_ipv4_addresses: true
timeout: 600
# An example for deleting a container
- hosts: localhost
connection: local
tasks:
- name: Delete a container
community.general.lxd_container:
name: mycontainer
state: absent
type: container
# An example for restarting a container
- hosts: localhost
connection: local
tasks:
- name: Restart a container
community.general.lxd_container:
name: mycontainer
state: restarted
type: container
# An example for restarting a container using https to connect to the LXD server
- hosts: localhost
connection: local
tasks:
- name: Restart a container
community.general.lxd_container:
url: https://127.0.0.1:8443
# These client_cert and client_key values are equal to the default values.
#client_cert: "{{ lookup('env', 'HOME') }}/.config/lxc/client.crt"
#client_key: "{{ lookup('env', 'HOME') }}/.config/lxc/client.key"
trust_password: mypassword
name: mycontainer
state: restarted
# Note your container must be in the inventory for the below example.
#
# [containers]
# mycontainer ansible_connection=lxd
#
- hosts:
- mycontainer
tasks:
- name: Copy /etc/hosts in the created container to localhost with name "mycontainer-hosts"
ansible.builtin.fetch:
src: /etc/hosts
dest: /tmp/mycontainer-hosts
flat: true
# An example for LXD cluster deployments. This example will create two new container on specific
# nodes - 'node01' and 'node02'. In 'target:', 'node01' and 'node02' are names of LXD cluster
# members that LXD cluster recognizes, not ansible inventory names, see: 'lxc cluster list'.
# LXD API calls can be made to any LXD member, in this example, we send API requests to
#'node01.example.com', which matches ansible inventory name.
- hosts: node01.example.com
tasks:
- name: Create LXD container
community.general.lxd_container:
name: new-container-1
ignore_volatile_options: true
state: started
source:
type: image
mode: pull
alias: ubuntu/xenial/amd64
target: node01
- name: Create container on another node
community.general.lxd_container:
name: new-container-2
ignore_volatile_options: true
state: started
source:
type: image
mode: pull
alias: ubuntu/xenial/amd64
target: node02
# An example for creating a virtual machine
- hosts: localhost
connection: local
tasks:
- name: Create container on another node
community.general.lxd_container:
name: new-vm-1
type: virtual-machine
state: started
ignore_volatile_options: true
wait_for_ipv4_addresses: true
profiles: ["default"]
source:
protocol: simplestreams
type: image
mode: pull
server: https://images.linuxcontainers.org
alias: debian/11
timeout: 600
'''
RETURN = '''
addresses:
description: Mapping from the network device name to a list of IPv4 addresses in the instance.
returned: when state is started or restarted
type: dict
sample: {"eth0": ["10.155.92.191"]}
old_state:
description: The old state of the instance.
returned: when state is started or restarted
type: str
sample: "stopped"
logs:
description: The logs of requests and responses.
returned: when ansible-playbook is invoked with -vvvv.
type: list
sample: "(too long to be placed here)"
actions:
description: List of actions performed for the instance.
returned: success
type: list
sample: ["create", "start"]
'''
import copy
import datetime
import os
import time
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.community.general.plugins.module_utils.lxd import LXDClient, LXDClientException
from ansible.module_utils.six.moves.urllib.parse import urlencode
# LXD_ANSIBLE_STATES is a map of states that contain values of methods used
# when a particular state is evoked.
LXD_ANSIBLE_STATES = {
'started': '_started',
'stopped': '_stopped',
'restarted': '_restarted',
'absent': '_destroyed',
'frozen': '_frozen',
}
# ANSIBLE_LXD_STATES is a map of states of lxd containers to the Ansible
# lxc_container module state parameter value.
ANSIBLE_LXD_STATES = {
'Running': 'started',
'Stopped': 'stopped',
'Frozen': 'frozen',
}
# ANSIBLE_LXD_DEFAULT_URL is a default value of the lxd endpoint
ANSIBLE_LXD_DEFAULT_URL = 'unix:/var/lib/lxd/unix.socket'
# CONFIG_PARAMS is a list of config attribute names.
CONFIG_PARAMS = [
'architecture', 'config', 'devices', 'ephemeral', 'profiles', 'source'
]
# CONFIG_CREATION_PARAMS is a list of attribute names that are only applied
# on instance creation.
CONFIG_CREATION_PARAMS = ['source']
class LXDContainerManagement(object):
def __init__(self, module):
"""Management of LXC containers via Ansible.
:param module: Processed Ansible Module.
:type module: ``object``
"""
self.module = module
self.name = self.module.params['name']
self.project = self.module.params['project']
self._build_config()
self.state = self.module.params['state']
self.timeout = self.module.params['timeout']
self.wait_for_ipv4_addresses = self.module.params['wait_for_ipv4_addresses']
self.force_stop = self.module.params['force_stop']
self.addresses = None
self.target = self.module.params['target']
self.wait_for_container = self.module.params['wait_for_container']
self.type = self.module.params['type']
# LXD Rest API provides additional endpoints for creating containers and virtual-machines.
self.api_endpoint = None
if self.type == 'container':
self.api_endpoint = '/1.0/containers'
elif self.type == 'virtual-machine':
self.api_endpoint = '/1.0/virtual-machines'
self.key_file = self.module.params.get('client_key')
if self.key_file is None:
self.key_file = '{0}/.config/lxc/client.key'.format(os.environ['HOME'])
self.cert_file = self.module.params.get('client_cert')
if self.cert_file is None:
self.cert_file = '{0}/.config/lxc/client.crt'.format(os.environ['HOME'])
self.debug = self.module._verbosity >= 4
try:
if self.module.params['url'] != ANSIBLE_LXD_DEFAULT_URL:
self.url = self.module.params['url']
elif os.path.exists(self.module.params['snap_url'].replace('unix:', '')):
self.url = self.module.params['snap_url']
else:
self.url = self.module.params['url']
except Exception as e:
self.module.fail_json(msg=e.msg)
try:
self.client = LXDClient(
self.url, key_file=self.key_file, cert_file=self.cert_file,
debug=self.debug
)
except LXDClientException as e:
self.module.fail_json(msg=e.msg)
self.trust_password = self.module.params.get('trust_password', None)
self.actions = []
self.diff = {'before': {}, 'after': {}}
self.old_instance_json = {}
self.old_sections = {}
def _build_config(self):
self.config = {}
for attr in CONFIG_PARAMS:
param_val = self.module.params.get(attr, None)
if param_val is not None:
self.config[attr] = param_val
def _get_instance_json(self):
url = '{0}/{1}'.format(self.api_endpoint, self.name)
if self.project:
url = '{0}?{1}'.format(url, urlencode(dict(project=self.project)))
return self.client.do('GET', url, ok_error_codes=[404])
def _get_instance_state_json(self):
url = '{0}/{1}/state'.format(self.api_endpoint, self.name)
if self.project:
url = '{0}?{1}'.format(url, urlencode(dict(project=self.project)))
return self.client.do('GET', url, ok_error_codes=[404])
@staticmethod
def _instance_json_to_module_state(resp_json):
if resp_json['type'] == 'error':
return 'absent'
return ANSIBLE_LXD_STATES[resp_json['metadata']['status']]
def _change_state(self, action, force_stop=False):
url = '{0}/{1}/state'.format(self.api_endpoint, self.name)
if self.project:
url = '{0}?{1}'.format(url, urlencode(dict(project=self.project)))
body_json = {'action': action, 'timeout': self.timeout}
if force_stop:
body_json['force'] = True
if not self.module.check_mode:
return self.client.do('PUT', url, body_json=body_json)
def _create_instance(self):
url = self.api_endpoint
url_params = dict()
if self.target:
url_params['target'] = self.target
if self.project:
url_params['project'] = self.project
if url_params:
url = '{0}?{1}'.format(url, urlencode(url_params))
config = self.config.copy()
config['name'] = self.name
if not self.module.check_mode:
self.client.do('POST', url, config, wait_for_container=self.wait_for_container)
self.actions.append('create')
def _start_instance(self):
self._change_state('start')
self.actions.append('start')
def _stop_instance(self):
self._change_state('stop', self.force_stop)
self.actions.append('stop')
def _restart_instance(self):
self._change_state('restart', self.force_stop)
self.actions.append('restart')
def _delete_instance(self):
url = '{0}/{1}'.format(self.api_endpoint, self.name)
if self.project:
url = '{0}?{1}'.format(url, urlencode(dict(project=self.project)))
if not self.module.check_mode:
self.client.do('DELETE', url)
self.actions.append('delete')
def _freeze_instance(self):
self._change_state('freeze')
self.actions.append('freeze')
def _unfreeze_instance(self):
self._change_state('unfreeze')
self.actions.append('unfreeze')
def _instance_ipv4_addresses(self, ignore_devices=None):
ignore_devices = ['lo'] if ignore_devices is None else ignore_devices
data = (self._get_instance_state_json() or {}).get('metadata', None) or {}
network = dict((k, v) for k, v in (data.get('network', None) or {}).items() if k not in ignore_devices)
addresses = dict((k, [a['address'] for a in v['addresses'] if a['family'] == 'inet']) for k, v in network.items())
return addresses
@staticmethod
def _has_all_ipv4_addresses(addresses):
return len(addresses) > 0 and all(len(v) > 0 for v in addresses.values())
def _get_addresses(self):
try:
due = datetime.datetime.now() + datetime.timedelta(seconds=self.timeout)
while datetime.datetime.now() < due:
time.sleep(1)
addresses = self._instance_ipv4_addresses()
if self._has_all_ipv4_addresses(addresses) or self.module.check_mode:
self.addresses = addresses
return
except LXDClientException as e:
e.msg = 'timeout for getting IPv4 addresses'
raise
def _started(self):
if self.old_state == 'absent':
self._create_instance()
self._start_instance()
else:
if self.old_state == 'frozen':
self._unfreeze_instance()
elif self.old_state == 'stopped':
self._start_instance()
if self._needs_to_apply_instance_configs():
self._apply_instance_configs()
if self.wait_for_ipv4_addresses:
self._get_addresses()
def _stopped(self):
if self.old_state == 'absent':
self._create_instance()
else:
if self.old_state == 'stopped':
if self._needs_to_apply_instance_configs():
self._start_instance()
self._apply_instance_configs()
self._stop_instance()
else:
if self.old_state == 'frozen':
self._unfreeze_instance()
if self._needs_to_apply_instance_configs():
self._apply_instance_configs()
self._stop_instance()
def _restarted(self):
if self.old_state == 'absent':
self._create_instance()
self._start_instance()
else:
if self.old_state == 'frozen':
self._unfreeze_instance()
if self._needs_to_apply_instance_configs():
self._apply_instance_configs()
self._restart_instance()
if self.wait_for_ipv4_addresses:
self._get_addresses()
def _destroyed(self):
if self.old_state != 'absent':
if self.old_state == 'frozen':
self._unfreeze_instance()
if self.old_state != 'stopped':
self._stop_instance()
self._delete_instance()
def _frozen(self):
if self.old_state == 'absent':
self._create_instance()
self._start_instance()
self._freeze_instance()
else:
if self.old_state == 'stopped':
self._start_instance()
if self._needs_to_apply_instance_configs():
self._apply_instance_configs()
self._freeze_instance()
def _needs_to_change_instance_config(self, key):
if key not in self.config:
return False
if key == 'config':
# self.old_sections is already filtered for volatile keys if necessary
old_configs = dict(self.old_sections.get(key, None) or {})
for k, v in self.config['config'].items():
if k not in old_configs:
return True
if old_configs[k] != v:
return True
return False
else:
old_configs = self.old_sections.get(key, {})
return self.config[key] != old_configs
def _needs_to_apply_instance_configs(self):
for param in set(CONFIG_PARAMS) - set(CONFIG_CREATION_PARAMS):
if self._needs_to_change_instance_config(param):
return True
return False
def _apply_instance_configs(self):
old_metadata = copy.deepcopy(self.old_instance_json).get('metadata', None) or {}
body_json = {}
for param in set(CONFIG_PARAMS) - set(CONFIG_CREATION_PARAMS):
if param in old_metadata:
body_json[param] = old_metadata[param]
if self._needs_to_change_instance_config(param):
if param == 'config':
body_json['config'] = body_json.get('config', None) or {}
for k, v in self.config['config'].items():
body_json['config'][k] = v
else:
body_json[param] = self.config[param]
self.diff['after']['instance'] = body_json
url = '{0}/{1}'.format(self.api_endpoint, self.name)
if self.project:
url = '{0}?{1}'.format(url, urlencode(dict(project=self.project)))
if not self.module.check_mode:
self.client.do('PUT', url, body_json=body_json)
self.actions.append('apply_instance_configs')
def run(self):
"""Run the main method."""
try:
if self.trust_password is not None:
self.client.authenticate(self.trust_password)
self.ignore_volatile_options = self.module.params.get('ignore_volatile_options')
self.old_instance_json = self._get_instance_json()
self.old_sections = dict(
(section, content) if not isinstance(content, dict)
else (section, dict((k, v) for k, v in content.items()
if not (self.ignore_volatile_options and k.startswith('volatile.'))))
for section, content in (self.old_instance_json.get('metadata', None) or {}).items()
if section in set(CONFIG_PARAMS) - set(CONFIG_CREATION_PARAMS)
)
self.diff['before']['instance'] = self.old_sections
# preliminary, will be overwritten in _apply_instance_configs() if called
self.diff['after']['instance'] = self.config
self.old_state = self._instance_json_to_module_state(self.old_instance_json)
self.diff['before']['state'] = self.old_state
self.diff['after']['state'] = self.state
action = getattr(self, LXD_ANSIBLE_STATES[self.state])
action()
state_changed = len(self.actions) > 0
result_json = {
'log_verbosity': self.module._verbosity,
'changed': state_changed,
'old_state': self.old_state,
'actions': self.actions,
'diff': self.diff,
}
if self.client.debug:
result_json['logs'] = self.client.logs
if self.addresses is not None:
result_json['addresses'] = self.addresses
self.module.exit_json(**result_json)
except LXDClientException as e:
state_changed = len(self.actions) > 0
fail_params = {
'msg': e.msg,
'changed': state_changed,
'actions': self.actions,
'diff': self.diff,
}
if self.client.debug:
fail_params['logs'] = e.kwargs['logs']
self.module.fail_json(**fail_params)
def main():
"""Ansible Main module."""
module = AnsibleModule(
argument_spec=dict(
name=dict(
type='str',
required=True,
),
project=dict(
type='str',
),
architecture=dict(
type='str',
),
config=dict(
type='dict',
),
ignore_volatile_options=dict(
type='bool',
default=False,
),
devices=dict(
type='dict',
),
ephemeral=dict(
type='bool',
),
profiles=dict(
type='list',
elements='str',
),
source=dict(
type='dict',
),
state=dict(
choices=list(LXD_ANSIBLE_STATES.keys()),
default='started',
),
target=dict(
type='str',
),
timeout=dict(
type='int',
default=30
),
type=dict(
type='str',
default='container',
choices=['container', 'virtual-machine'],
),
wait_for_container=dict(
type='bool',
default=False,
),
wait_for_ipv4_addresses=dict(
type='bool',
default=False,
),
force_stop=dict(
type='bool',
default=False,
),
url=dict(
type='str',
default=ANSIBLE_LXD_DEFAULT_URL,
),
snap_url=dict(
type='str',
default='unix:/var/snap/lxd/common/lxd/unix.socket',
),
client_key=dict(
type='path',
aliases=['key_file'],
),
client_cert=dict(
type='path',
aliases=['cert_file'],
),
trust_password=dict(type='str', no_log=True),
),
supports_check_mode=True,
)
lxd_manage = LXDContainerManagement(module=module)
lxd_manage.run()
if __name__ == '__main__':
main()