# 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()