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Apply config to the existing container

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This commit is contained in:
Hiroaki Nakamura 2016-06-04 16:43:21 +09:00
parent f786a3e113
commit f78e6f49e8
1 changed files with 107 additions and 11 deletions
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118
cloud/lxd/lxd_container.py
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@ -38,6 +38,19 @@ options:
See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
- Required when the container is not created yet and the state is
not absent.
- If the container already exists and its metadata obtained from
GET /1.0/containers/<name>
https://github.com/lxc/lxd/blob/master/doc/rest-api.md#10containersname
are different, they this module tries to apply the configurations.
The following keys in config will be compared and applied.
- architecture
- config
- The key starts with 'volatile.' are ignored for comparison.
- devices
- ephemeral
- profiles
- Not all config values are supported to apply the existing container.
Maybe you need to delete and recreate a container.
required: false
state:
choices:
@ -238,13 +251,22 @@ class LxdContainerManagement(object):
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.logs = []
self.actions = []
def _path_to_url(self, path):
return self.base_url + path
def _send_request(self, method, path, json=None, ok_error_codes=None):
try:
url = self.base_url + path
url = self._path_to_url(path)
resp = self.session.request(method, url, json=json, timeout=self.timeout)
resp_json = resp.json()
self.logs.append({
'type': 'sent request',
'request': {'method': method, 'url': url, 'json': json, 'timeout': self.timeout},
'response': {'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:
@ -252,7 +274,8 @@ class LxdContainerManagement(object):
self.module.fail_json(
msg='error response',
request={'method': method, 'url': url, 'json': json, 'timeout': self.timeout},
response={'json': resp_json}
response={'json': resp_json},
logs=self.logs
)
return resp_json
except ConnectionError:
@ -263,8 +286,22 @@ class LxdContainerManagement(object):
if resp_json['type'] == 'async':
path = '{0}/wait?timeout={1}'.format(resp_json['operation'], self.timeout)
resp_json = self._send_request('GET', path)
if resp_json['metadata']['status'] != 'Success':
url = self._path_to_url(path)
self.module.fail_json(
msg='error response for waiting opearation',
request={'method': method, 'url': url, 'json': json, 'timeout': self.timeout},
response={'json': resp_json},
logs=self.logs
)
return resp_json
def _get_container_json(self):
return self._send_request(
'GET', '/1.0/containers/{0}'.format(self.container_name),
ok_error_codes=[404]
)
def _get_container_state_json(self):
return self._send_request(
'GET', '/1.0/containers/{0}/state'.format(self.container_name),
@ -272,7 +309,7 @@ class LxdContainerManagement(object):
)
@staticmethod
def _container_state_json_to_module_state(resp_json):
def _container_json_to_module_state(resp_json):
if resp_json['type'] == 'error':
return 'absent'
return ANSIBLE_LXD_STATES[resp_json['metadata']['status']]
@ -316,8 +353,8 @@ class LxdContainerManagement(object):
def _container_ipv4_addresses(self, ignore_devices=['lo']):
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 {}
network = dict((k, v) for k, v in network.items() 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.items()) or {}
return addresses
@staticmethod
@ -338,7 +375,8 @@ class LxdContainerManagement(object):
failed=True,
msg='timeout for getting IPv4 addresses',
changed=state_changed,
logs=self.actions)
actions=self.actions,
logs=self.logs)
def _started(self):
if self.old_state == 'absent':
@ -347,6 +385,10 @@ class LxdContainerManagement(object):
else:
if self.old_state == 'frozen':
self._unfreeze_container()
elif self.old_state == 'stopped':
self._start_container()
if self._needs_to_apply_configs():
self._apply_configs()
if self.wait_for_ipv4_addresses:
self._get_addresses()
@ -354,9 +396,17 @@ class LxdContainerManagement(object):
if self.old_state == 'absent':
self._create_container()
else:
if self.old_state == 'frozen':
self._unfreeze_container()
self._stop_container()
if self.old_state == 'stopped':
if self._needs_to_apply_configs():
self._start_container()
self._apply_configs()
self._stop_container()
else:
if self.old_state == 'frozen':
self._unfreeze_container()
if self._needs_to_apply_configs():
self._apply_configs()
self._stop_container()
def _restarted(self):
if self.old_state == 'absent':
@ -365,6 +415,8 @@ class LxdContainerManagement(object):
else:
if self.old_state == 'frozen':
self._unfreeze_container()
if self._needs_to_apply_configs():
self._apply_configs()
self._restart_container()
if self.wait_for_ipv4_addresses:
self._get_addresses()
@ -384,12 +436,55 @@ class LxdContainerManagement(object):
else:
if self.old_state == 'stopped':
self._start_container()
if self._needs_to_apply_configs():
self._apply_configs()
self._freeze_container()
def _needs_to_change_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 k.startswith('volatile.'))
else:
old_configs = self.old_container_json['metadata'][key]
return self.config[key] != old_configs
def _needs_to_apply_configs(self):
return (
self._needs_to_change_config('architecture') or
self._needs_to_change_config('config') or
self._needs_to_change_config('ephemeral') or
self._needs_to_change_config('devices') or
self._needs_to_change_config('profiles')
)
def _apply_configs(self):
old_metadata = self.old_container_json['metadata']
json = {
'architecture': old_metadata['architecture'],
'config': old_metadata['config'],
'devices': old_metadata['devices'],
'profiles': old_metadata['profiles']
}
if self._needs_to_change_config('architecture'):
json['architecture'] = self.config['architecture']
if self._needs_to_change_config('config'):
for k, v in self.config['config'].items():
json['config'][k] = v
if self._needs_to_change_config('ephemeral'):
json['ephemeral'] = self.config['ephemeral']
if self._needs_to_change_config('devices'):
json['devices'] = self.config['devices']
if self._needs_to_change_config('profiles'):
json['profiles'] = self.config['profiles']
self._operate_and_wait('PUT', '/1.0/containers/{0}'.format(self.container_name), json)
self.actions.append('apply_configs')
def run(self):
"""Run the main method."""
self.old_state = self._container_state_json_to_module_state(self._get_container_state_json())
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()
@ -398,6 +493,7 @@ class LxdContainerManagement(object):
result_json = {
'changed': state_changed,
'old_state': self.old_state,
'logs': self.logs,
'actions': self.actions
}
if self.addresses is not None:
@ -427,7 +523,7 @@ def main():
),
wait_for_ipv4_addresses=dict(
type='bool',
default=True
default=False
),
force_stop=dict(
type='bool',