Load Balancing as a Service (LBaaS) for OpenStack
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octavia/octavia/api/v2/controllers/availability_zones.py

176 lines
8.1 KiB

# Copyright 2019 Verizon Media
#
# 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 oslo_db import api as oslo_db_api
from oslo_db import exception as odb_exceptions
from oslo_log import log as logging
from oslo_utils import excutils
from pecan import request as pecan_request
from sqlalchemy.orm import exc as sa_exception
from wsme import types as wtypes
from wsmeext import pecan as wsme_pecan
from octavia.api.v2.controllers import base
from octavia.api.v2.types import availability_zones as availability_zone_types
from octavia.common import constants
from octavia.common import exceptions
from octavia.db import api as db_api
LOG = logging.getLogger(__name__)
class AvailabilityZonesController(base.BaseController):
RBAC_TYPE = constants.RBAC_AVAILABILITY_ZONE
def __init__(self):
super(AvailabilityZonesController, self).__init__()
@wsme_pecan.wsexpose(availability_zone_types.AvailabilityZoneRootResponse,
wtypes.text, [wtypes.text], ignore_extra_args=True)
def get_one(self, name, fields=None):
"""Gets an Availability Zone's detail."""
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ONE)
if name == constants.NIL_UUID:
raise exceptions.NotFound(resource='Availability Zone',
id=constants.NIL_UUID)
db_availability_zone = self._get_db_availability_zone(
context.session, name)
result = self._convert_db_to_type(
db_availability_zone,
availability_zone_types.AvailabilityZoneResponse)
if fields is not None:
result = self._filter_fields([result], fields)[0]
return availability_zone_types.AvailabilityZoneRootResponse(
availability_zone=result)
@wsme_pecan.wsexpose(availability_zone_types.AvailabilityZonesRootResponse,
[wtypes.text], ignore_extra_args=True)
def get_all(self, fields=None):
"""Lists all Availability Zones."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
db_availability_zones, links = (
self.repositories.availability_zone.get_all(
context.session,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER)))
result = self._convert_db_to_type(
db_availability_zones,
[availability_zone_types.AvailabilityZoneResponse])
if fields is not None:
result = self._filter_fields(result, fields)
return availability_zone_types.AvailabilityZonesRootResponse(
availability_zones=result, availability_zones_links=links)
@wsme_pecan.wsexpose(availability_zone_types.AvailabilityZoneRootResponse,
body=availability_zone_types.AvailabilityZoneRootPOST,
status_code=201)
def post(self, availability_zone_):
"""Creates an Availability Zone."""
availability_zone = availability_zone_.availability_zone
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_POST)
lock_session = db_api.get_session(autocommit=False)
try:
availability_zone_dict = availability_zone.to_dict(
render_unsets=True)
db_availability_zone = self.repositories.availability_zone.create(
lock_session, **availability_zone_dict)
lock_session.commit()
except odb_exceptions.DBDuplicateEntry:
lock_session.rollback()
raise exceptions.RecordAlreadyExists(field='availability zone',
name=availability_zone.name)
except Exception:
with excutils.save_and_reraise_exception():
lock_session.rollback()
result = self._convert_db_to_type(
db_availability_zone,
availability_zone_types.AvailabilityZoneResponse)
return availability_zone_types.AvailabilityZoneRootResponse(
availability_zone=result)
@wsme_pecan.wsexpose(availability_zone_types.AvailabilityZoneRootResponse,
wtypes.text, status_code=200,
body=availability_zone_types.AvailabilityZoneRootPUT)
def put(self, name, availability_zone_):
availability_zone = availability_zone_.availability_zone
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_PUT)
if name == constants.NIL_UUID:
raise exceptions.NotFound(resource='Availability Zone',
id=constants.NIL_UUID)
lock_session = db_api.get_session(autocommit=False)
try:
availability_zone_dict = availability_zone.to_dict(
render_unsets=False)
if availability_zone_dict:
self.repositories.availability_zone.update(
lock_session, name, **availability_zone_dict)
lock_session.commit()
except Exception:
with excutils.save_and_reraise_exception():
lock_session.rollback()
# Force SQL alchemy to query the DB, otherwise we get inconsistent
# results
context.session.expire_all()
db_availability_zone = self._get_db_availability_zone(
context.session, name)
result = self._convert_db_to_type(
db_availability_zone,
availability_zone_types.AvailabilityZoneResponse)
return availability_zone_types.AvailabilityZoneRootResponse(
availability_zone=result)
@oslo_db_api.wrap_db_retry(max_retries=5, retry_on_deadlock=True)
@wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
def delete(self, availability_zone_name):
"""Deletes an Availability Zone"""
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_DELETE)
if availability_zone_name == constants.NIL_UUID:
raise exceptions.NotFound(resource='Availability Zone',
id=constants.NIL_UUID)
serial_session = db_api.get_session(autocommit=False)
serial_session.connection(
execution_options={'isolation_level': 'SERIALIZABLE'})
try:
self.repositories.availability_zone.delete(
serial_session, name=availability_zone_name)
serial_session.commit()
# Handle when load balancers still reference this availability_zone
except odb_exceptions.DBReferenceError:
serial_session.rollback()
raise exceptions.ObjectInUse(object='Availability Zone',
id=availability_zone_name)
except sa_exception.NoResultFound:
serial_session.rollback()
raise exceptions.NotFound(resource='Availability Zone',
id=availability_zone_name)
except Exception as e:
with excutils.save_and_reraise_exception():
LOG.error(
'Unknown availability_zone delete exception: %s', str(e))
serial_session.rollback()
finally:
serial_session.close()