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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from keystoneauth1 import exceptions as kaexception
from oslo_log import log
from ironic.common import keystone
from ironic.common import states
from ironic.conf import CONF
LOG = log.getLogger(__name__)
NOVA_API_VERSION = "2.1"
NOVA_API_MICROVERSION = '2.76'
_NOVA_ADAPTER = None
def _get_nova_adapter():
global _NOVA_ADAPTER
if not _NOVA_ADAPTER:
_NOVA_ADAPTER = keystone.get_adapter(
'nova',
session=keystone.get_session('nova'),
auth=keystone.get_auth('nova'),
version=NOVA_API_VERSION)
return _NOVA_ADAPTER
def _get_power_update_event(server_uuid, target_power_state):
return {'name': 'power-update',
'server_uuid': server_uuid,
'tag': target_power_state}
def _send_event(context, event, api_version=None):
"""Sends an event to Nova conveying power state change.
:param context:
request context,
instance of ironic.common.context.RequestContext
:param event:
A "power-update" event for nova to act upon.
:param api_version:
api version of nova
:returns:
A boolean which indicates if the event was sent and received
successfully.
"""
try:
nova = _get_nova_adapter()
response = nova.post(
'/os-server-external-events', json={'events': [event]},
microversion=api_version, global_request_id=context.global_id,
raise_exc=False)
except kaexception.ClientException as ex:
LOG.warning('Could not connect to Nova to send a power notification, '
'please check configuration. %s', ex)
return False
try:
if response.status_code >= 400:
LOG.warning('Failed to notify nova on event: %s. %s.',
event, response.text)
return False
resp_event = response.json()['events'][0]
code = resp_event['code']
except Exception as e:
LOG.error('Invalid response %s returned from nova for power-update '
'event %s. %s.', response, event, e)
return False
if code >= 400:
LOG.warning('Nova event: %s returned with failed status.', resp_event)
return False
LOG.debug('Nova event response: %s.', resp_event)
return True
def power_update(context, server_uuid, target_power_state):
"""Creates and sends power state change for the provided server_uuid.
:param context:
request context,
instance of ironic.common.context.RequestContext
:param server_uuid:
The uuid of the node whose power state changed.
:param target_power_state:
Targeted power state change i.e "POWER_ON" or "POWER_OFF"
:returns:
A boolean which indicates if the power update was executed
successfully (mainly for testing purposes).
"""
if not CONF.nova.send_power_notifications:
return False
if target_power_state == states.POWER_ON:
target_power_state = "POWER_ON"
elif target_power_state == states.POWER_OFF:
target_power_state = "POWER_OFF"
else:
LOG.error('Invalid Power State %s.', target_power_state)
return False
event = _get_power_update_event(server_uuid, target_power_state)
result = _send_event(context, event, api_version=NOVA_API_MICROVERSION)
return result
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