Apply config to the existing container
This commit is contained in:
Hiroaki Nakamura
parent
f786a3e113
commit
f78e6f49e8
1 changed files with 107 additions and 11 deletions
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@ -38,6 +38,19 @@ options:
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See https://github.com/lxc/lxd/blob/master/doc/rest-api.md#post-1
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- Required when the container is not created yet and the state is
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not absent.
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- If the container already exists and its metadata 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 following keys in config will be compared and applied.
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- architecture
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- config
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- The key starts with 'volatile.' are ignored for comparison.
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- devices
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- ephemeral
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- profiles
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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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state:
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choices:
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@ -238,13 +251,22 @@ class LxdContainerManagement(object):
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self.unix_socket_path = self.module.params['unix_socket_path']
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self.base_url = 'http+unix://{0}'.format(quote(self.unix_socket_path, safe=''))
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self.session = requests_unixsocket.Session()
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self.logs = []
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self.actions = []
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def _path_to_url(self, path):
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return self.base_url + path
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def _send_request(self, method, path, json=None, ok_error_codes=None):
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try:
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url = self.base_url + path
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url = self._path_to_url(path)
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resp = self.session.request(method, url, json=json, timeout=self.timeout)
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resp_json = resp.json()
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self.logs.append({
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'type': 'sent request',
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'request': {'method': method, 'url': url, 'json': 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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@ -252,7 +274,8 @@ class LxdContainerManagement(object):
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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': json, 'timeout': self.timeout},
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response={'json': resp_json}
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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 ConnectionError:
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@ -263,8 +286,22 @@ class LxdContainerManagement(object):
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if resp_json['type'] == 'async':
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path = '{0}/wait?timeout={1}'.format(resp_json['operation'], self.timeout)
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resp_json = self._send_request('GET', path)
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if resp_json['metadata']['status'] != 'Success':
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url = self._path_to_url(path)
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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, 'json': 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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def _get_container_json(self):
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return self._send_request(
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'GET', '/1.0/containers/{0}'.format(self.container_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.container_name),
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@ -272,7 +309,7 @@ class LxdContainerManagement(object):
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)
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@staticmethod
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def _container_state_json_to_module_state(resp_json):
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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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@ -316,8 +353,8 @@ class LxdContainerManagement(object):
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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.iteritems() 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.iteritems()) 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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@ -338,7 +375,8 @@ class LxdContainerManagement(object):
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failed=True,
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msg='timeout for getting IPv4 addresses',
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changed=state_changed,
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logs=self.actions)
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actions=self.actions,
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logs=self.logs)
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def _started(self):
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if self.old_state == 'absent':
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@ -347,15 +385,27 @@ class LxdContainerManagement(object):
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else:
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if self.old_state == 'frozen':
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self._unfreeze_container()
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elif self.old_state == 'stopped':
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self._start_container()
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if self._needs_to_apply_configs():
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self._apply_configs()
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if self.wait_for_ipv4_addresses:
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self._get_addresses()
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def _stopped(self):
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if self.old_state == 'absent':
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self._create_container()
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else:
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if self.old_state == 'stopped':
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if self._needs_to_apply_configs():
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self._start_container()
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self._apply_configs()
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self._stop_container()
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else:
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if self.old_state == 'frozen':
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self._unfreeze_container()
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if self._needs_to_apply_configs():
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self._apply_configs()
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self._stop_container()
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def _restarted(self):
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@ -365,6 +415,8 @@ class LxdContainerManagement(object):
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else:
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if self.old_state == 'frozen':
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self._unfreeze_container()
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if self._needs_to_apply_configs():
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self._apply_configs()
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self._restart_container()
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if self.wait_for_ipv4_addresses:
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self._get_addresses()
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@ -384,12 +436,55 @@ class LxdContainerManagement(object):
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else:
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if self.old_state == 'stopped':
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self._start_container()
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if self._needs_to_apply_configs():
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self._apply_configs()
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self._freeze_container()
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def _needs_to_change_config(self, key):
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if key not in self.config:
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return False
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if key == 'config':
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old_configs = dict((k, v) for k, v in self.old_container_json['metadata'][key].items() if k.startswith('volatile.'))
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else:
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old_configs = self.old_container_json['metadata'][key]
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return self.config[key] != old_configs
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def _needs_to_apply_configs(self):
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return (
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self._needs_to_change_config('architecture') or
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self._needs_to_change_config('config') or
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self._needs_to_change_config('ephemeral') or
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self._needs_to_change_config('devices') or
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self._needs_to_change_config('profiles')
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)
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def _apply_configs(self):
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old_metadata = self.old_container_json['metadata']
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json = {
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'architecture': old_metadata['architecture'],
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'config': old_metadata['config'],
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'devices': old_metadata['devices'],
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'profiles': old_metadata['profiles']
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}
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if self._needs_to_change_config('architecture'):
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json['architecture'] = self.config['architecture']
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if self._needs_to_change_config('config'):
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for k, v in self.config['config'].items():
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json['config'][k] = v
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if self._needs_to_change_config('ephemeral'):
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json['ephemeral'] = self.config['ephemeral']
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if self._needs_to_change_config('devices'):
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json['devices'] = self.config['devices']
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if self._needs_to_change_config('profiles'):
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json['profiles'] = self.config['profiles']
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self._operate_and_wait('PUT', '/1.0/containers/{0}'.format(self.container_name), json)
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self.actions.append('apply_configs')
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def run(self):
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"""Run the main method."""
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self.old_state = self._container_state_json_to_module_state(self._get_container_state_json())
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self.old_container_json = self._get_container_json()
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self.old_state = self._container_json_to_module_state(self.old_container_json)
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action = getattr(self, LXD_ANSIBLE_STATES[self.state])
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action()
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@ -398,6 +493,7 @@ class LxdContainerManagement(object):
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result_json = {
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'changed': state_changed,
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'old_state': self.old_state,
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'logs': self.logs,
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'actions': self.actions
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}
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if self.addresses is not None:
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@ -427,7 +523,7 @@ def main():
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),
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wait_for_ipv4_addresses=dict(
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type='bool',
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default=True
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default=False
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),
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force_stop=dict(
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type='bool',
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