100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
#
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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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from oslo_log import log as logging
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from heat.common.i18n import _
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from heat.engine import properties
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from heat.engine import resource
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from heat.engine import support
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LOG = logging.getLogger(__name__)
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class QoSSpecs(resource.Resource):
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"""A resource for creating cinder QoS specs.
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Users can ask for a specific volume type. Part of that volume type is a
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string that defines the QoS of the volume IO (fast, normal, or slow).
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Backends that can handle all of the demands of the volume type become
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candidates for scheduling. Usage of this resource restricted to admins
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only by default policy.
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"""
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support_status = support.SupportStatus(version='7.0.0')
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default_client_name = 'cinder'
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entity = 'qos_specs'
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required_service_extension = 'qos-specs'
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PROPERTIES = (
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NAME, SPECS,
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) = (
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'name', 'specs',
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)
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properties_schema = {
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NAME: properties.Schema(
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properties.Schema.STRING,
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_('Name of the QoS.'),
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),
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SPECS: properties.Schema(
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properties.Schema.MAP,
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_('The specs key and value pairs of the QoS.'),
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required=True,
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update_allowed=True
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),
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}
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def _find_diff(self, update_prps, stored_prps):
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remove_prps = list(
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set(stored_prps.keys() or []) - set(update_prps.keys() or [])
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)
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add_prps = dict(set(update_prps.items() or []) - set(
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stored_prps.items() or []))
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return add_prps, remove_prps
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def handle_create(self):
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name = (self.properties[self.NAME] or
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self.physical_resource_name())
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specs = self.properties[self.SPECS]
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qos = self.client().qos_specs.create(name, specs)
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self.resource_id_set(qos.id)
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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"""Update the specs for QoS."""
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new_specs = prop_diff.get(self.SPECS)
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old_specs = self.properties[self.SPECS]
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add_specs, remove_specs = self._find_diff(new_specs, old_specs)
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if self.resource_id is not None:
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# Set new specs to QoS Specs
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if add_specs:
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self.client().qos_specs.set_keys(self.resource_id, add_specs)
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# Unset old specs from QoS Specs
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if remove_specs:
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self.client().qos_specs.unset_keys(self.resource_id,
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remove_specs)
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def handle_delete(self):
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if self.resource_id is not None:
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self.client().qos_specs.disassociate_all(self.resource_id)
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super(QoSSpecs, self).handle_delete()
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def resource_mapping():
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return {
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'OS::Cinder::QoSSpecs': QoSSpecs,
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}
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