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Remove dependency to pylxd and use requests_unixsocket directly

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reviewable/pr18780/r1
Hiroaki Nakamura 9 years ago
parent 05700edc0b
commit f786a3e113
1 changed files with 146 additions and 102 deletions
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248
cloud/lxd/lxd_container.py
Unescape Escape View File

@ -50,16 +50,34 @@ options:
- Define the state of a container.
required: false
default: started
timeout_for_addresses:
timeout:
description:
- A timeout of waiting for IPv4 addresses are set to the all network
interfaces in the container after starting or restarting.
- If this value is equal to or less than 0, Ansible does not
wait for IPv4 addresses.
- A timeout of one LXC REST API call.
- This is also used as a timeout for waiting until IPv4 addresses
are set to the all network interfaces in the container after
starting or restarting.
required: false
default: 0
default: 30
wait_for_ipv4_addresses:
description:
- If this is true, the lxd_module waits until IPv4 addresses
are set to the all network interfaces in the container after
starting or restarting.
required: false
default: false
force_stop:
description:
- If this is true, the lxd_module forces to stop the container
when it stops or restarts the container.
required: false
default: false
unix_socket_path:
description:
- The unix domain socket path for the LXD server.
required: false
default: /var/lib/lxd/unix.socket
requirements:
- 'pylxd >= 2.0'
- 'requests_unixsocket'
notes:
- Containers must have a unique name. If you attempt to create a container
with a name that already existed in the users namespace the module will
@ -156,23 +174,22 @@ lxd_container:
description: the old state of the container
returned: when state is started or restarted
sample: "stopped"
logs:
actions:
description: list of actions performed for the container
returned: success
type: list
sample: ["created", "started"]
sample: ["create", "start"]
"""
from distutils.spawn import find_executable
from ansible.compat.six.moves.urllib.parse import quote
try:
from pylxd.client import Client
import requests_unixsocket
from requests.exceptions import ConnectionError
except ImportError:
HAS_PYLXD = False
HAS_REQUETS_UNIXSOCKET = False
else:
HAS_PYLXD = True
from requests.exceptions import ConnectionError
HAS_REQUETS_UNIXSOCKET = True
# LXD_ANSIBLE_STATES is a map of states that contain values of methods used
# when a particular state is evoked.
@ -214,61 +231,91 @@ class LxdContainerManagement(object):
self.container_name = self.module.params['name']
self.config = self.module.params.get('config', None)
self.state = self.module.params['state']
self.timeout_for_addresses = self.module.params['timeout_for_addresses']
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.client = Client()
self.logs = []
self.unix_socket_path = self.module.params['unix_socket_path']
self.base_url = 'http+unix://{0}'.format(quote(self.unix_socket_path, safe=''))
self.session = requests_unixsocket.Session()
self.actions = []
def _send_request(self, method, path, json=None, ok_error_codes=None):
try:
url = self.base_url + path
resp = self.session.request(method, url, json=json, timeout=self.timeout)
resp_json = resp.json()
resp_type = resp_json.get('type', None)
if resp_type == 'error':
if ok_error_codes is not None and resp_json['error_code'] in ok_error_codes:
return resp_json
self.module.fail_json(
msg='error response',
request={'method': method, 'url': url, 'json': json, 'timeout': self.timeout},
response={'json': resp_json}
)
return resp_json
except ConnectionError:
self.module.fail_json(msg='cannot connect to the LXD server', unix_socket_path=self.unix_socket_path)
def _operate_and_wait(self, method, path, json=None):
resp_json = self._send_request(method, path, json=json)
if resp_json['type'] == 'async':
path = '{0}/wait?timeout={1}'.format(resp_json['operation'], self.timeout)
resp_json = self._send_request('GET', path)
return resp_json
def _get_container_state_json(self):
return self._send_request(
'GET', '/1.0/containers/{0}/state'.format(self.container_name),
ok_error_codes=[404]
)
@staticmethod
def _container_state_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):
json={'action': action, 'timeout': self.timeout}
if force_stop:
json['force'] = True
return self._operate_and_wait('PUT', '/1.0/containers/{0}/state'.format(self.container_name), json)
def _create_container(self):
config = self.config.copy()
config['name'] = self.container_name
self.client.containers.create(config, wait=True)
# NOTE: get container again for the updated state
self.container = self._get_container()
self.logs.append('created')
self._operate_and_wait('POST', '/1.0/containers', config)
self.actions.append('creat')
def _start_container(self):
self.container.start(wait=True)
self.logs.append('started')
self._change_state('start')
self.actions.append('start')
def _stop_container(self):
self.container.stop(wait=True)
self.logs.append('stopped')
self._change_state('stop', self.force_stop)
self.actions.append('stop')
def _restart_container(self):
self.container.restart(wait=True)
self.logs.append('restarted')
self._change_state('restart', self.force_stop)
self.actions.append('restart')
def _delete_container(self):
self.container.delete(wait=True)
self.logs.append('deleted')
return self._operate_and_wait('DELETE', '/1.0/containers/{0}'.format(self.container_name))
self.actions.append('delete')
def _freeze_container(self):
self.container.freeze(wait=True)
self.logs.append('freezed')
self._change_state('freeze')
self.actions.append('freeze')
def _unfreeze_container(self):
self.container.unfreeze(wait=True)
self.logs.append('unfreezed')
def _get_container(self):
try:
return self.client.containers.get(self.container_name)
except NameError:
return None
except ConnectionError:
self.module.fail_json(msg="Cannot connect to lxd server")
@staticmethod
def _container_to_module_state(container):
if container is None:
return "absent"
else:
return ANSIBLE_LXD_STATES[container.status]
self._change_state('unfreeze')
self.actions.append('unfreez')
def _container_ipv4_addresses(self, ignore_devices=['lo']):
container = self._get_container()
network = container is not None and container.state().network or {}
resp_json = self._get_container_state_json()
network = resp_json['metadata']['network'] or {}
network = dict((k, v) for k, v in network.iteritems() if k not in ignore_devices) or {}
addresses = dict((k, [a['address'] for a in v['addresses'] if a['family'] == 'inet']) for k, v in network.iteritems()) or {}
return addresses
@ -278,95 +325,80 @@ class LxdContainerManagement(object):
return len(addresses) > 0 and all([len(v) > 0 for v in addresses.itervalues()])
def _get_addresses(self):
if self.timeout_for_addresses <= 0:
return
due = datetime.datetime.now() + datetime.timedelta(seconds=self.timeout_for_addresses)
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
self._on_timeout()
def _started(self):
"""Ensure a container is started.
state_changed = len(self.actions) > 0
self.module.fail_json(
failed=True,
msg='timeout for getting IPv4 addresses',
changed=state_changed,
logs=self.actions)
If the container does not exist the container will be created.
"""
if self.container is None:
def _started(self):
if self.old_state == 'absent':
self._create_container()
self._start_container()
else:
if self.container.status == 'Frozen':
if self.old_state == 'frozen':
self._unfreeze_container()
if self.container.status != 'Running':
self._start_container()
self._get_addresses()
if self.wait_for_ipv4_addresses:
self._get_addresses()
def _stopped(self):
if self.container is None:
if self.old_state == 'absent':
self._create_container()
else:
if self.container.status == 'Frozen':
if self.old_state == 'frozen':
self._unfreeze_container()
if self.container.status != 'Stopped':
self._stop_container()
self._stop_container()
def _restarted(self):
if self.container is None:
if self.old_state == 'absent':
self._create_container()
self._start_container()
else:
if self.container.status == 'Frozen':
if self.old_state == 'frozen':
self._unfreeze_container()
if self.container.status == 'Running':
self._restart_container()
else:
self._start_container()
self._get_addresses()
self._restart_container()
if self.wait_for_ipv4_addresses:
self._get_addresses()
def _destroyed(self):
if self.container is not None:
if self.container.status == 'Frozen':
if self.old_state != 'absent':
if self.old_state == 'frozen':
self._unfreeze_container()
if self.container.status == 'Running':
self._stop_container()
self._stop_container()
self._delete_container()
def _frozen(self):
if self.container is None:
if self.old_state == 'absent':
self._create_container()
self._start_container()
self._freeze_container()
else:
if self.container.status != 'Frozen':
if self.container.status != 'Running':
self._start_container()
self._freeze_container()
def _on_timeout(self):
state_changed = len(self.logs) > 0
self.module.fail_json(
failed=True,
msg='timeout for getting addresses',
changed=state_changed,
logs=self.logs)
if self.old_state == 'stopped':
self._start_container()
self._freeze_container()
def run(self):
"""Run the main method."""
self.container = self._get_container()
self.old_state = self._container_to_module_state(self.container)
self.old_state = self._container_state_json_to_module_state(self._get_container_state_json())
action = getattr(self, LXD_ANSIBLE_STATES[self.state])
action()
state_changed = len(self.logs) > 0
state_changed = len(self.actions) > 0
result_json = {
"changed" : state_changed,
"old_state" : self.old_state,
"logs" : self.logs
'changed': state_changed,
'old_state': self.old_state,
'actions': self.actions
}
if self.addresses is not None:
result_json['addresses'] = self.addresses
@ -389,17 +421,29 @@ def main():
choices=LXD_ANSIBLE_STATES.keys(),
default='started'
),
timeout_for_addresses=dict(
timeout=dict(
type='int',
default=0
default=30
),
wait_for_ipv4_addresses=dict(
type='bool',
default=True
),
force_stop=dict(
type='bool',
default=False
),
unix_socket_path=dict(
type='str',
default='/var/lib/lxd/unix.socket'
)
),
supports_check_mode=False,
)
if not HAS_PYLXD:
if not HAS_REQUETS_UNIXSOCKET:
module.fail_json(
msg='The `pylxd` module is not importable. Check the requirements.'
msg='The `requests_unixsocket` module is not importable. Check the requirements.'
)
lxd_manage = LxdContainerManagement(module=module)

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