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

161 lines
7.1 KiB

# Copyright 2014 Rackspace
# Copyright 2016 Blue Box, an IBM Company
#
# 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 oslo_utils import uuidutils
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 flavors as flavor_types
from octavia.common import constants
from octavia.common import exceptions
from octavia.db import api as db_api
LOG = logging.getLogger(__name__)
class FlavorsController(base.BaseController):
RBAC_TYPE = constants.RBAC_FLAVOR
def __init__(self):
super(FlavorsController, self).__init__()
@wsme_pecan.wsexpose(flavor_types.FlavorRootResponse, wtypes.text,
[wtypes.text], ignore_extra_args=True)
def get_one(self, id, fields=None):
"""Gets a flavor's detail."""
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ONE)
if id == constants.NIL_UUID:
raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
db_flavor = self._get_db_flavor(context.session, id)
result = self._convert_db_to_type(db_flavor,
flavor_types.FlavorResponse)
if fields is not None:
result = self._filter_fields([result], fields)[0]
return flavor_types.FlavorRootResponse(flavor=result)
@wsme_pecan.wsexpose(flavor_types.FlavorsRootResponse,
[wtypes.text], ignore_extra_args=True)
def get_all(self, fields=None):
"""Lists all flavors."""
pcontext = pecan_request.context
context = pcontext.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_GET_ALL)
db_flavors, links = self.repositories.flavor.get_all(
context.session,
pagination_helper=pcontext.get(constants.PAGINATION_HELPER))
result = self._convert_db_to_type(
db_flavors, [flavor_types.FlavorResponse])
if fields is not None:
result = self._filter_fields(result, fields)
return flavor_types.FlavorsRootResponse(
flavors=result, flavors_links=links)
@wsme_pecan.wsexpose(flavor_types.FlavorRootResponse,
body=flavor_types.FlavorRootPOST, status_code=201)
def post(self, flavor_):
"""Creates a flavor."""
flavor = flavor_.flavor
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_POST)
# TODO(johnsom) Validate the flavor profile ID
lock_session = db_api.get_session(autocommit=False)
try:
flavor_dict = flavor.to_dict(render_unsets=True)
flavor_dict['id'] = uuidutils.generate_uuid()
db_flavor = self.repositories.flavor.create(lock_session,
**flavor_dict)
lock_session.commit()
except odb_exceptions.DBDuplicateEntry:
lock_session.rollback()
raise exceptions.RecordAlreadyExists(field='flavor',
name=flavor.name)
except Exception:
with excutils.save_and_reraise_exception():
lock_session.rollback()
result = self._convert_db_to_type(db_flavor,
flavor_types.FlavorResponse)
return flavor_types.FlavorRootResponse(flavor=result)
@wsme_pecan.wsexpose(flavor_types.FlavorRootResponse,
wtypes.text, status_code=200,
body=flavor_types.FlavorRootPUT)
def put(self, id, flavor_):
flavor = flavor_.flavor
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_PUT)
if id == constants.NIL_UUID:
raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
lock_session = db_api.get_session(autocommit=False)
try:
flavor_dict = flavor.to_dict(render_unsets=False)
if flavor_dict:
self.repositories.flavor.update(lock_session, id,
**flavor_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_flavor = self._get_db_flavor(context.session, id)
result = self._convert_db_to_type(db_flavor,
flavor_types.FlavorResponse)
return flavor_types.FlavorRootResponse(flavor=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, flavor_id):
"""Deletes a Flavor"""
context = pecan_request.context.get('octavia_context')
self._auth_validate_action(context, context.project_id,
constants.RBAC_DELETE)
if flavor_id == constants.NIL_UUID:
raise exceptions.NotFound(resource='Flavor', id=constants.NIL_UUID)
serial_session = db_api.get_session(autocommit=False)
serial_session.connection(
execution_options={'isolation_level': 'SERIALIZABLE'})
try:
self.repositories.flavor.delete(serial_session, id=flavor_id)
serial_session.commit()
# Handle when load balancers still reference this flavor
except odb_exceptions.DBReferenceError:
serial_session.rollback()
raise exceptions.ObjectInUse(object='Flavor', id=flavor_id)
except sa_exception.NoResultFound:
serial_session.rollback()
raise exceptions.NotFound(resource='Flavor', id=flavor_id)
except Exception as e:
with excutils.save_and_reraise_exception():
LOG.error('Unknown flavor delete exception: %s', str(e))
serial_session.rollback()
finally:
serial_session.close()