145 lines
5.1 KiB
Python
145 lines
5.1 KiB
Python
# 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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# This is referred from Redfish standard schema.
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# http://redfish.dmtf.org/schemas/v1/Storage.v1_4_0.json
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import logging
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from sushy.resources import base
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from sushy.resources.system.storage import drive
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from sushy.resources.system.storage import volume
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from sushy import utils
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LOG = logging.getLogger(__name__)
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class Storage(base.ResourceBase):
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"""This class represents the storage subsystem resources.
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A storage subsystem represents a set of storage controllers (physical or
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virtual) and the resources such as drives and volumes that can be accessed
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from that subsystem.
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"""
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identity = base.Field('Id', required=True)
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"""The Storage identity string"""
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name = base.Field('Name')
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"""The name of the resource"""
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drives_identities = base.Field('Drives',
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adapter=utils.get_members_identities)
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"""A tuple with the drive identities"""
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_drives_max_size_bytes = None
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_drives = None
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_volumes = None # reference to VolumeCollection instance
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def get_drive(self, drive_identity):
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"""Given the drive identity return a ``Drive`` object
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:param identity: The identity of the ``Drive``
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:returns: The ``Drive`` object
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:raises: ResourceNotFoundError
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"""
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return drive.Drive(self._conn, drive_identity,
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redfish_version=self.redfish_version)
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@property
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def drives(self):
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"""Return a list of `Drive` objects present in the storage resource.
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It is set once when the first time it is queried. On subsequent
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invocations, it returns a cached list of `Drives` objects until it is
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marked stale.
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:returns: A list of `Drive` objects
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:raises: ResourceNotFoundError
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"""
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if self._drives is None:
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self._drives = [
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self.get_drive(id_) for id_ in self.drives_identities]
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return self._drives
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@property
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def drives_max_size_bytes(self):
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"""Max size available in bytes among all Drives of this collection."""
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if self._drives_max_size_bytes is None:
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self._drives_max_size_bytes = (
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utils.max_safe(drv.capacity_bytes for drv in self.drives))
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return self._drives_max_size_bytes
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@property
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def volumes(self):
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"""Property to reference `VolumeCollection` instance
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It is set once when the first time it is queried. On refresh,
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this property is marked as stale (greedy-refresh not done at that
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point). Here only the actual refresh of the sub-resource happens,
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if resource is stale.
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"""
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if self._volumes is None:
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self._volumes = volume.VolumeCollection(
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self._conn, utils.get_sub_resource_path_by(self, 'Volumes'),
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redfish_version=self.redfish_version)
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self._volumes.refresh(force=False)
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return self._volumes
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def _do_refresh(self, force=False):
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"""Do resource specific refresh activities."""
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# Note(deray): undefine the attribute here for fresh evaluation in
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# subsequent calls to it's exposed property.
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self._drives_max_size_bytes = None
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self._drives = None
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# invalidate the nested resource
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if self._volumes is not None:
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self._volumes.invalidate(force)
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class StorageCollection(base.ResourceCollectionBase):
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"""This class represents the collection of Storage resources"""
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_max_drive_size_bytes = None
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_max_volume_size_bytes = None
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@property
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def _resource_type(self):
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return Storage
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@property
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def max_drive_size_bytes(self):
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"""Max size available (in bytes) among all device resources."""
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if self._max_drive_size_bytes is None:
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self._max_drive_size_bytes = max(
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storage_.drives_max_size_bytes
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for storage_ in self.get_members())
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return self._max_drive_size_bytes
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@property
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def max_volume_size_bytes(self):
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"""Max size available (in bytes) among all Volumes under this."""
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if self._max_volume_size_bytes is None:
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self._max_volume_size_bytes = max(
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storage_.volumes.max_size_bytes
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for storage_ in self.get_members())
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return self._max_volume_size_bytes
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def _do_refresh(self, force=False):
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"""Do resource specific refresh activities"""
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# Note(deray): undefine the attributes here for fresh evaluation in
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# subsequent calls to their exposed properties.
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self._max_drive_size_bytes = None
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self._max_volume_size_bytes = None
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