324 lines
14 KiB
Python
324 lines
14 KiB
Python
# Copyright (c) 2016 IBM
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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 functools
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import re
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from keystoneauth1 import exceptions as ks_exc
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from keystoneauth1 import loading as keystone
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from oslo_log import log as logging
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from oslo_utils import versionutils
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from neutron_lib._i18n import _
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from neutron_lib.exceptions import placement as n_exc
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LOG = logging.getLogger(__name__)
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API_VERSION_REQUEST_HEADER = 'OpenStack-API-Version'
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PLACEMENT_API_WITH_MEMBER_OF = 'placement 1.3'
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PLACEMENT_API_WITH_NESTED_RESOURCES = 'placement 1.14'
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PLACEMENT_API_LATEST_SUPPORTED = PLACEMENT_API_WITH_NESTED_RESOURCES
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def _check_placement_api_available(f):
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"""Check if the placement API is available.
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:param f: Function to execute.
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:returns: The returned value of the function f.
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:raises PlacementEndpointNotFound: If the placement API endpoint configured
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is not found.
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"""
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@functools.wraps(f)
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def wrapper(self, *a, **k):
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try:
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if not self._client:
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self._client = self._create_client()
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return f(self, *a, **k)
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except ks_exc.EndpointNotFound:
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LOG.warning('Please enable the placement service.')
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except ks_exc.MissingAuthPlugin:
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LOG.warning('No authentication information found for placement '
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'API. Please enable the placement service.')
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except ks_exc.Unauthorized:
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LOG.warning('Placement service credentials do not work. '
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'Please enable the placement service.')
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except ks_exc.DiscoveryFailure:
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LOG.warning('Discovering suitable URL for placement API failed.')
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except ks_exc.ConnectFailure:
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LOG.warning('Placement API service is not responding.')
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return wrapper
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def _get_version(openstack_api_version):
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match = re.search(r"placement (?P<api_version>\d+\.\d+)",
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openstack_api_version)
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return versionutils.convert_version_to_tuple(match.group('api_version'))
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class PlacementAPIClient(object):
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"""Client class for placement ReST API."""
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def __init__(self, conf,
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openstack_api_version=PLACEMENT_API_LATEST_SUPPORTED):
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self._openstack_api_version = openstack_api_version
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self._target_version = _get_version(openstack_api_version)
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self._conf = conf
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self._ks_filter = {'service_type': 'placement',
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'region_name': self._conf.placement.region_name}
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self._client = None
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def _create_client(self):
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"""Create the HTTP session accessing the placement service."""
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# Flush _resource_providers and aggregates so we start from a
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# clean slate.
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self._resource_providers = {}
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self._provider_aggregate_map = {}
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auth_plugin = keystone.load_auth_from_conf_options(
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self._conf, 'placement')
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return keystone.load_session_from_conf_options(
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self._conf, 'placement', auth=auth_plugin,
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additional_headers={'accept': 'application/json'})
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def _get(self, url, **kwargs):
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return self._client.get(url, endpoint_filter=self._ks_filter,
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**kwargs)
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def _post(self, url, data, **kwargs):
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return self._client.post(url, json=data,
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endpoint_filter=self._ks_filter, **kwargs)
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def _put(self, url, data, **kwargs):
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return self._client.put(url, json=data,
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endpoint_filter=self._ks_filter, **kwargs)
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def _delete(self, url, **kwargs):
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return self._client.delete(url, endpoint_filter=self._ks_filter,
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**kwargs)
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@_check_placement_api_available
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def create_resource_provider(self, resource_provider):
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"""Create a resource provider.
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:param resource_provider: The resource provider. A dict with the name
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(required) and the uuid (required).
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"""
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url = '/resource_providers'
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self._post(url, resource_provider,
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headers={API_VERSION_REQUEST_HEADER:
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self._openstack_api_version})
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@_check_placement_api_available
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def delete_resource_provider(self, resource_provider_uuid):
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"""Delete a resource provider.
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:param resource_provider_uuid: UUID of the resource provider.
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"""
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url = '/resource_providers/%s' % resource_provider_uuid
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self._delete(url)
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@_check_placement_api_available
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def get_resource_provider(self, resource_provider_uuid):
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"""Get resource provider by UUID.
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:param resource_provider_uuid: UUID of the resource provider.
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:raises PlacementResourceProviderNotFound: If the resource provider is
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not present.
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:returns: The Resource Provider matching the UUID.
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:raises PlacementResourceProviderNotFound: For failure to find resource
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"""
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url = '/resource_providers/%s' % resource_provider_uuid
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try:
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return self._get(url, headers={API_VERSION_REQUEST_HEADER:
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self._openstack_api_version}).json()
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except ks_exc.NotFound:
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raise n_exc.PlacementResourceProviderNotFound(
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resource_provider=resource_provider_uuid)
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@_check_placement_api_available
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def list_resource_providers(self, name=None, member_of=None,
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resources=None, in_tree=None, uuid=None):
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"""Get a list of resource providers.
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:param name: Name of the resource providers.
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:param member_of: List of aggregate UUID to get those resource
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providers that are associated with.
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NOTE: placement 1.3 needed.
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:param resources: Dictionary of resource classes and requested values.
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:param in_tree: UUID of a resource provider that the caller wants to
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limit the returned providers to those within its
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'provider tree'. The returned list will contain only
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resource providers with the root_provider_id of the
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resource provider with UUID == tree_uuid.
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NOTE: placement 1.14 needed.
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:param uuid: UUID of the resource provider.
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:returns: A list of Resource Provider matching the filters.
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:raises PlacementAPIVersionIncorrect: If placement API target version
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is too low
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"""
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url = '/resource_providers'
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filters = {}
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if name:
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filters['name'] = name
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if member_of:
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needed_version = _get_version(PLACEMENT_API_WITH_MEMBER_OF)
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if self._target_version < needed_version:
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raise n_exc.PlacementAPIVersionIncorrect(
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current_version=self._target_version,
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needed_version=needed_version)
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filters['member_of'] = member_of
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if resources:
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filters['resources'] = resources
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if in_tree:
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needed_version = _get_version(
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PLACEMENT_API_WITH_NESTED_RESOURCES)
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if self._target_version < needed_version:
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raise n_exc.PlacementAPIVersionIncorrect(
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current_version=self._target_version,
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needed_version=needed_version)
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filters['in_tree'] = in_tree
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if uuid:
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filters['uuid'] = uuid
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return self._get(url, headers={API_VERSION_REQUEST_HEADER:
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self._openstack_api_version},
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**filters).json()
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@_check_placement_api_available
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def update_resource_provider_inventories(
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self, resource_provider_uuid, inventories,
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resource_provider_generation):
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"""Update resource provider inventories.
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:param resource_provider_uuid: UUID of the resource provider.
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:param inventories: The inventories. A dict in the format (see:
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Placement API ref: https://goo.gl/F22mtk)
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{resource_class(required):
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{allocation_ratio(required):
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total(required):
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max_unit(required):
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min_unit(required):
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reserved(required):
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step_size(required):
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}}
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:param resource_provider_generation: The generation of the resource
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provider.
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:raises PlacementResourceProviderNotFound: if the resource provider
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is not found.
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:raises PlacementResourceProviderGenerationConflict: if the generation
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of the resource
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provider does not
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match with the
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server side.
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"""
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url = '/resource_providers/%s/inventories' % resource_provider_uuid
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body = {
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'resource_provider_generation': resource_provider_generation,
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'inventories': inventories
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}
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try:
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return self._put(url, body).json()
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except ks_exc.NotFound:
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raise n_exc.PlacementResourceProviderNotFound(
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resource_provider=resource_provider_uuid)
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except ks_exc.Conflict:
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raise n_exc.PlacementResourceProviderGenerationConflict(
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resource_provider=resource_provider_uuid,
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generation=resource_provider_generation)
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@_check_placement_api_available
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def get_inventory(self, resource_provider_uuid, resource_class):
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"""Get resource provider inventory.
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:param resource_provider_uuid: UUID of the resource provider.
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:param resource_class: Resource class name of the inventory to be
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returned.
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:raises PlacementInventoryNotFound: For failure to find inventory
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for a resource provider.
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"""
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url = '/resource_providers/%s/inventories/%s' % (
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resource_provider_uuid, resource_class)
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try:
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return self._get(url).json()
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except ks_exc.NotFound as e:
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if "No resource provider with uuid" in e.details:
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raise n_exc.PlacementResourceProviderNotFound(
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resource_provider=resource_provider_uuid)
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elif _("No inventory of class") in e.details:
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raise n_exc.PlacementInventoryNotFound(
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resource_provider=resource_provider_uuid,
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resource_class=resource_class)
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else:
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raise
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@_check_placement_api_available
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def update_resource_provider_inventory(
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self, resource_provider_uuid, inventory, resource_class,
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resource_provider_generation):
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"""Update resource provider inventory.
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:param resource_provider_uuid: UUID of the resource provider.
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:param inventory: The inventory to be updated for the resource class.
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:param resource_class: The name of the resource class.
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:param resource_provider_generation: The generation of the resource
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provider.
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:raises PlacementResourceNotFound: If the resource provider or the
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resource class is not found.
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:raises PlacementInventoryUpdateConflict: If the resource provider
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generation does not match
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with the server side.
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"""
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url = '/resource_providers/%s/inventories/%s' % (
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resource_provider_uuid, resource_class)
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inventory['resource_provider_generation'] = \
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resource_provider_generation
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try:
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return self._put(url, inventory).json()
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except ks_exc.NotFound as e:
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raise n_exc.PlacementResourceNotFound(url=e.url)
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except ks_exc.Conflict:
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raise n_exc.PlacementInventoryUpdateConflict(
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resource_provider=resource_provider_uuid,
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resource_class=resource_class)
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@_check_placement_api_available
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def associate_aggregates(self, resource_provider_uuid, aggregates):
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"""Associate a list of aggregates with a resource provider.
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:param resource_provider_uuid: UUID of the resource provider.
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:param aggregates: aggregates to be associated to the resource
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provider.
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"""
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url = '/resource_providers/%s/aggregates' % resource_provider_uuid
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self._put(url, aggregates,
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headers={API_VERSION_REQUEST_HEADER:
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self._openstack_api_version})
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@_check_placement_api_available
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def list_aggregates(self, resource_provider_uuid):
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"""List resource provider aggregates.
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:param resource_provider_uuid: UUID of the resource provider.
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:raises PlacementAggregateNotFound: For failure to the aggregates of
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a resource provider.
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"""
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url = '/resource_providers/%s/aggregates' % resource_provider_uuid
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try:
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return self._get(
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url, headers={API_VERSION_REQUEST_HEADER:
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self._openstack_api_version}).json()
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except ks_exc.NotFound:
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raise n_exc.PlacementAggregateNotFound(
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resource_provider=resource_provider_uuid)
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