273 lines
10 KiB
Python
273 lines
10 KiB
Python
# coding=utf-8
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#
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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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from oslo_utils import strutils
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from oslo_utils import uuidutils
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from iotronic.common import exception
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from iotronic.db import api as db_api
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from iotronic.objects import base
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from iotronic.objects import utils as obj_utils
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class Node(base.IotronicObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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dbapi = db_api.get_instance()
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fields = {
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'id': int,
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'uuid': obj_utils.str_or_none,
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'name': obj_utils.str_or_none,
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'status': obj_utils.str_or_none,
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#'chassis_id': obj_utils.int_or_none,
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#'instance_uuid': obj_utils.str_or_none,
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#'driver': obj_utils.str_or_none,
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#'driver_info': obj_utils.dict_or_none,
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#'driver_internal_info': obj_utils.dict_or_none,
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# A clean step dictionary, indicating the current clean step
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# being executed, or None, indicating cleaning is not in progress
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# or has not yet started.
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#'clean_step': obj_utils.dict_or_none,
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#'instance_info': obj_utils.dict_or_none,
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#'properties': obj_utils.dict_or_none,
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'reservation': obj_utils.str_or_none,
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# a reference to the id of the conductor service, not its hostname,
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# that has most recently performed some action which could require
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# local state to be maintained (eg, built a PXE config)
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#'conductor_affinity': obj_utils.int_or_none,
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# One of states.POWER_ON|POWER_OFF|NOSTATE|ERROR
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#'power_state': obj_utils.str_or_none,
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# Set to one of states.POWER_ON|POWER_OFF when a power operation
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# starts, and set to NOSTATE when the operation finishes
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# (successfully or unsuccessfully).
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#'target_power_state': obj_utils.str_or_none,
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#'provision_state': obj_utils.str_or_none,
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#'provision_updated_at': obj_utils.datetime_or_str_or_none,
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#'target_provision_state': obj_utils.str_or_none,
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#'maintenance': bool,
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#'maintenance_reason': obj_utils.str_or_none,
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#'console_enabled': bool,
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# Any error from the most recent (last) asynchronous transaction
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# that started but failed to finish.
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#'last_error': obj_utils.str_or_none,
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#'inspection_finished_at': obj_utils.datetime_or_str_or_none,
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#'inspection_started_at': obj_utils.datetime_or_str_or_none,
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#'extra': obj_utils.dict_or_none,
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}
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@staticmethod
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def _from_db_object(node, db_node):
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"""Converts a database entity to a formal object."""
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for field in node.fields:
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node[field] = db_node[field]
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node.obj_reset_changes()
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return node
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@base.remotable_classmethod
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def get(cls, context, node_id):
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"""Find a node based on its id or uuid and return a Node object.
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:param node_id: the id *or* uuid of a node.
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:returns: a :class:`Node` object.
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"""
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if strutils.is_int_like(node_id):
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return cls.get_by_id(context, node_id)
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elif uuidutils.is_uuid_like(node_id):
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return cls.get_by_uuid(context, node_id)
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else:
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raise exception.InvalidIdentity(identity=node_id)
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@base.remotable_classmethod
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def get_by_id(cls, context, node_id):
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"""Find a node based on its integer id and return a Node object.
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:param node_id: the id of a node.
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:returns: a :class:`Node` object.
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"""
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db_node = cls.dbapi.get_node_by_id(node_id)
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node = Node._from_db_object(cls(context), db_node)
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return node
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@base.remotable_classmethod
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def get_by_uuid(cls, context, uuid):
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"""Find a node based on uuid and return a Node object.
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:param uuid: the uuid of a node.
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:returns: a :class:`Node` object.
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"""
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db_node = cls.dbapi.get_node_by_uuid(uuid)
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node = Node._from_db_object(cls(context), db_node)
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return node
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@base.remotable_classmethod
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def get_by_name(cls, context, name):
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"""Find a node based on name and return a Node object.
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:param name: the logical name of a node.
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:returns: a :class:`Node` object.
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"""
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db_node = cls.dbapi.get_node_by_name(name)
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node = Node._from_db_object(cls(context), db_node)
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return node
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@base.remotable_classmethod
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def get_by_instance_uuid(cls, context, instance_uuid):
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"""Find a node based on the instance uuid and return a Node object.
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:param uuid: the uuid of the instance.
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:returns: a :class:`Node` object.
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"""
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db_node = cls.dbapi.get_node_by_instance(instance_uuid)
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node = Node._from_db_object(cls(context), db_node)
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return node
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@base.remotable_classmethod
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def list(cls, context, limit=None, marker=None, sort_key=None,
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sort_dir=None, filters=None):
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"""Return a list of Node objects.
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:param context: Security context.
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:param limit: maximum number of resources to return in a single result.
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:param marker: pagination marker for large data sets.
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:param sort_key: column to sort results by.
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:param sort_dir: direction to sort. "asc" or "desc".
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:param filters: Filters to apply.
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:returns: a list of :class:`Node` object.
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"""
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db_nodes = cls.dbapi.get_node_list(filters=filters, limit=limit,
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marker=marker, sort_key=sort_key,
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sort_dir=sort_dir)
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return [Node._from_db_object(cls(context), obj) for obj in db_nodes]
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@base.remotable_classmethod
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def reserve(cls, context, tag, node_id):
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"""Get and reserve a node.
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To prevent other ManagerServices from manipulating the given
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Node while a Task is performed, mark it reserved by this host.
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:param context: Security context.
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:param tag: A string uniquely identifying the reservation holder.
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:param node_id: A node id or uuid.
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:raises: NodeNotFound if the node is not found.
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:returns: a :class:`Node` object.
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"""
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db_node = cls.dbapi.reserve_node(tag, node_id)
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node = Node._from_db_object(cls(context), db_node)
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return node
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@base.remotable_classmethod
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def release(cls, context, tag, node_id):
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"""Release the reservation on a node.
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:param context: Security context.
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:param tag: A string uniquely identifying the reservation holder.
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:param node_id: A node id or uuid.
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:raises: NodeNotFound if the node is not found.
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"""
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cls.dbapi.release_node(tag, node_id)
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@base.remotable
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def create(self, context=None):
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"""Create a Node record in the DB.
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Column-wise updates will be made based on the result of
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self.what_changed(). If target_power_state is provided,
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it will be checked against the in-database copy of the
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node before updates are made.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Node(context)
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"""
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values = self.obj_get_changes()
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db_node = self.dbapi.create_node(values)
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self._from_db_object(self, db_node)
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@base.remotable
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def destroy(self, context=None):
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"""Delete the Node from the DB.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Node(context)
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"""
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self.dbapi.destroy_node(self.uuid)
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self.obj_reset_changes()
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@base.remotable
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def save(self, context=None):
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"""Save updates to this Node.
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Column-wise updates will be made based on the result of
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self.what_changed(). If target_power_state is provided,
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it will be checked against the in-database copy of the
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node before updates are made.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Node(context)
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"""
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updates = self.obj_get_changes()
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if 'driver' in updates and 'driver_internal_info' not in updates:
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# Clean driver_internal_info when changes driver
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self.driver_internal_info = {}
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updates = self.obj_get_changes()
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self.dbapi.update_node(self.uuid, updates)
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self.obj_reset_changes()
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@base.remotable
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def refresh(self, context=None):
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"""Refresh the object by re-fetching from the DB.
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:param context: Security context. NOTE: This should only
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be used internally by the indirection_api.
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Unfortunately, RPC requires context as the first
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argument, even though we don't use it.
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A context should be set when instantiating the
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object, e.g.: Node(context)
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"""
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current = self.__class__.get_by_uuid(self._context, self.uuid)
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for field in self.fields:
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if (hasattr(self, base.get_attrname(field)) and
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self[field] != current[field]):
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self[field] = current[field]
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