/usr/lib/python2.7/dist-packages/neutron_lbaas/drivers/driver_base.py is in python-neutron-lbaas 2:8.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 functools import wraps
from neutron import context as ncontext
from oslo_log import log as logging
from oslo_utils import excutils
from neutron_lbaas.common import exceptions
from neutron_lbaas.db.loadbalancer import models
from neutron_lbaas.drivers import driver_mixins
from neutron_lbaas.services.loadbalancer import constants
LOG = logging.getLogger(__name__)
class NotImplementedManager(object):
"""Helper class to make any subclass of LoadBalancerBaseDriver explode if
it is missing any of the required object managers.
"""
def create(self, context, obj):
raise NotImplementedError()
def update(self, context, old_obj, obj):
raise NotImplementedError()
def delete(self, context, obj):
raise NotImplementedError()
class LoadBalancerBaseDriver(object):
"""LBaaSv2 object model drivers should subclass LoadBalancerBaseDriver,
and initialize the following manager classes to create, update, and delete
the various load balancer objects.
"""
model_map = {constants.LOADBALANCER_EVENT: models.LoadBalancer,
constants.LISTENER_EVENT: models.Listener,
constants.POOL_EVENT: models.PoolV2,
constants.MEMBER_EVENT: models.MemberV2}
load_balancer = NotImplementedManager()
listener = NotImplementedManager()
pool = NotImplementedManager()
member = NotImplementedManager()
health_monitor = NotImplementedManager()
l7policy = NotImplementedManager()
l7rule = NotImplementedManager()
def __init__(self, plugin):
self.plugin = plugin
def handle_streamed_event(self, container):
# TODO(crc32): update_stats will be implemented here in the future
if container.info_type not in LoadBalancerBaseDriver.model_map:
if container.info_type == constants.LISTENER_STATS_EVENT:
return
else:
exc = exceptions.ModelMapException(
target_name=container.info_type)
raise exc
else:
model_class = LoadBalancerBaseDriver.model_map[
container.info_type]
context = ncontext.get_admin_context()
self.plugin.db.update_status(context, model_class,
container.info_id,
**container.info_payload)
class BaseLoadBalancerManager(driver_mixins.BaseRefreshMixin,
driver_mixins.BaseStatsMixin,
driver_mixins.BaseManagerMixin):
model_class = models.LoadBalancer
@property
def allocates_vip(self):
"""Does this driver need to allocate its own virtual IPs"""
return False
def create_and_allocate_vip(self, context, obj):
"""Create the load balancer and allocate a VIP
If this method is implemented AND allocates_vip returns True, then
this method will be called instead of the create method. Any driver
that implements this method is responsible for allocating a virtual IP
and updating at least the vip_address attribute in the loadbalancer
database table.
"""
raise NotImplementedError
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_loadbalancer
class BaseListenerManager(driver_mixins.BaseManagerMixin):
model_class = models.Listener
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_listener
class BasePoolManager(driver_mixins.BaseManagerMixin):
model_class = models.PoolV2
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_pool
class BaseMemberManager(driver_mixins.BaseManagerMixin):
model_class = models.MemberV2
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_member
class BaseHealthMonitorManager(driver_mixins.BaseManagerMixin):
model_class = models.HealthMonitorV2
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_healthmonitor
class BaseL7PolicyManager(driver_mixins.BaseManagerMixin):
model_class = models.L7Policy
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_l7policy
class BaseL7RuleManager(driver_mixins.BaseManagerMixin):
model_class = models.L7Rule
@property
def db_delete_method(self):
return self.driver.plugin.db.delete_l7policy_rule
# A decorator for wrapping driver operations, which will automatically
# set the neutron object's status based on whether it sees an exception
def driver_op(func):
@wraps(func)
def func_wrapper(*args, **kwargs):
d = (func.__name__ == 'delete')
try:
r = func(*args, **kwargs)
args[0].successful_completion(
args[1], args[2], delete=d)
return r
except Exception:
with excutils.save_and_reraise_exception():
args[0].failed_completion(args[1], args[2])
return func_wrapper
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