9ef0860033
The placement client is going to be used by other services aside from segments; e.g. QoS plugin. It makes sense to move this file to a common place, like neutron-lib. Closes-Bug: #1723452 Partial-Bug: #1578989 Change-Id: I2f7d204828a620152ec9e005e057fc7fd77f9126
207 lines
8.4 KiB
Python
207 lines
8.4 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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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 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_AGGREGATES = 'placement 1.1'
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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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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_WITH_AGGREGATES):
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self._openstack_api_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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@_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 create_inventory(self, resource_provider_uuid, inventory):
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"""Create an inventory.
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:param resource_provider_uuid: UUID of the resource provider.
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:param inventory: The inventory. A dict with resource_class (required),
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total (required), reserved (required), min_unit
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(required), max_unit (required), step_size
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(required) and allocation_ratio (required).
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"""
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url = '/resource_providers/%s/inventories' % resource_provider_uuid
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self._post(url, inventory)
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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_inventory(self, resource_provider_uuid, inventory,
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resource_class):
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"""Update an inventory.
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:param resource_provider_uuid: UUID of the resource provider.
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:param inventory: The inventory, in a dictionary.
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:param resource_class: The resource class of the inventory to update.
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:raises PlacementInventoryUpdateConflict: For failure to update
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inventory due to outdated
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resource_provider_generation.
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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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self._put(url, inventory)
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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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