3c584084c3
This patch introduces application logic support for tracking Neutron resource usage data, thus introducing a different way of enforcing quota limits, which now relies on records tracking resource usage for each tenant. When these records go "out-of-sync" with actual resource usage, the quota usage table entry is marked "dirty". And it will be resynchronized the next time a resource count is requested. Changes in resource utilization are detected using SQLAlchemy events. This patch however does not automatically enable resource usage tracking for any plugin. Plugins must explicitly declare for which resources they wish to enable tracking. To this aim, this patch provides the @tracked_resources decorator. As some operators might wish to not use resource usage tracking, this patch adds the track_quota_usage configuration option. If set to False, DB-level usage tracking will not be performed, and resources will be counted as before, ie: invoking a plugin method. Usage tracking is performed using a new resource type, TrackedResource, which can work side by side with CountableResource, the one Neutron used so far. To this aim a ResourceRegistry class has been introduced for registering and managing resources. Most of the resource management code previously embedded in the QuotaEngine class is being moved to ResourceRegistry as a part of this patch. Partially implements blueprint better-quota Change-Id: If461399900973a38d7b82e0b3ac54fc052f09529
102 lines
3.1 KiB
Python
102 lines
3.1 KiB
Python
# Copyright 2013 VMware, Inc.
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# All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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from neutron.api import extensions
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from neutron.api.v2 import base
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from neutron import manager
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from neutron.quota import resource_registry
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# Attribute Map
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RESOURCE_ATTRIBUTE_MAP = {
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'ext_test_resources': {
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'id': {'allow_post': False, 'allow_put': False,
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'validate': {'type:uuid': None},
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'is_visible': True},
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'name': {'allow_post': True, 'allow_put': True,
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'validate': {'type:string': None},
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'is_visible': True, 'default': ''},
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'tenant_id': {'allow_post': True, 'allow_put': False,
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'required_by_policy': True,
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'validate': {'type:string': None},
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'is_visible': True},
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}
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}
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class Extensionattribute(extensions.ExtensionDescriptor):
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@classmethod
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def get_name(cls):
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return "Extension Test Resource"
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@classmethod
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def get_alias(cls):
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return "ext-obj-test"
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@classmethod
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def get_description(cls):
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return "Extension Test Resource"
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@classmethod
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def get_updated(cls):
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return "2013-02-05T10:00:00-00:00"
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def update_attributes_map(self, attributes):
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super(Extensionattribute, self).update_attributes_map(
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attributes, extension_attrs_map=RESOURCE_ATTRIBUTE_MAP)
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@classmethod
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def get_resources(cls):
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"""Returns Ext Resources."""
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exts = []
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plugin = manager.NeutronManager.get_plugin()
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resource_name = 'ext_test_resource'
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collection_name = resource_name + "s"
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params = RESOURCE_ATTRIBUTE_MAP.get(collection_name, dict())
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resource_registry.register_resource_by_name(resource_name)
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controller = base.create_resource(collection_name,
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resource_name,
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plugin, params,
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member_actions={})
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ex = extensions.ResourceExtension(collection_name,
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controller,
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member_actions={})
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exts.append(ex)
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return exts
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def get_extended_resources(self, version):
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if version == "2.0":
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return RESOURCE_ATTRIBUTE_MAP
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else:
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return {}
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class ExtensionObjectTestPluginBase(object):
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@abc.abstractmethod
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def create_ext_test_resource(self, context, router):
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pass
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@abc.abstractmethod
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def get_ext_test_resource(self, context, id, fields=None):
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pass
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