nova/nova/cells/filters/__init__.py
Claudiu Belu 7d01bceaa0 policy: clean-up
Registers in-code the last remaining policy rules.
Adds missing 'discoverable' rules. Without them,
the extension_info API can fail, as it tries to check the
os_compute_api:os_server_tags:discoverable rule. As it wasn't
previously registered, when listing the available extensions,
an exception of type PolicyNotRegistered is encountered.
In order to validate this, functional/api_sample_tests/test_extension_info.py
now runs without mocking policy.authorize.

Switches extension_info to context.can.
Switches nova.cells.filters to context.can.
Switches network.neutronv2.api to context.can.

Removes the rest of the entries in etc/policy.json.
Removes DefaultPolicyTestCase, as it tests the default
policy rule, which is not registered.
Removes rules from fake_policy.py that brings no value,
that are the same as the default values.
Removes extensions authorizer factories.
Removes nova.policy.enforce.

Change-Id: Ie7771768f4f3efe0edc787c12f297aa93d533d7e
Partially-Implements: bp policy-in-code
2016-06-30 19:56:14 +00:00

57 lines
1.8 KiB
Python

# Copyright (c) 2012-2013 Rackspace Hosting
# All Rights Reserved.
#
# 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.
"""
Cell scheduler filters
"""
from nova import filters
class BaseCellFilter(filters.BaseFilter):
"""Base class for cell filters."""
def authorized(self, ctxt):
"""Return whether or not the context is authorized for this filter
based on policy.
The policy action is "cells_scheduler_filter:<name>" where <name>
is the name of the filter class.
"""
name = 'cells_scheduler_filter:' + self.__class__.__name__
return ctxt.can(name, fatal=False)
def _filter_one(self, cell, filter_properties):
return self.cell_passes(cell, filter_properties)
def cell_passes(self, cell, filter_properties):
"""Return True if the CellState passes the filter, otherwise False.
Override this in a subclass.
"""
raise NotImplementedError()
class CellFilterHandler(filters.BaseFilterHandler):
def __init__(self):
super(CellFilterHandler, self).__init__(BaseCellFilter)
def all_filters():
"""Return a list of filter classes found in this directory.
This method is used as the default for available scheduler filters
and should return a list of all filter classes available.
"""
return CellFilterHandler().get_all_classes()