# -*- encoding: utf-8 -*-
# Copyright 2013 IBM Corp.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
In the Watcher system, an :ref:`Audit <audit_definition>` is a request for
optimizing a :ref:`Cluster <cluster_definition>`.
The optimization is done in order to satisfy one :ref:`Goal <goal_definition>`
on a given :ref:`Cluster <cluster_definition>`.
For each :ref:`Audit <audit_definition>`, the Watcher system generates an
:ref:`Action Plan <action_plan_definition>`.
An :ref:`Audit <audit_definition>` has a life-cycle and its current state may
be one of the following:
- **PENDING** : a request for an :ref:`Audit <audit_definition>` has been
submitted (either manually by the
:ref:`Administrator <administrator_definition>` or automatically via some
event handling mechanism) and is in the queue for being processed by the
:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
- **ONGOING** : the :ref:`Audit <audit_definition>` is currently being
processed by the
:ref:`Watcher Decision Engine <watcher_decision_engine_definition>`
- **SUCCEEDED** : the :ref:`Audit <audit_definition>` has been executed
successfully (note that it may not necessarily produce a
:ref:`Solution <solution_definition>`).
- **FAILED** : an error occured while executing the
:ref:`Audit <audit_definition>`
- **DELETED** : the :ref:`Audit <audit_definition>` is still stored in the
:ref:`Watcher database <watcher_database_definition>` but is not returned
any more through the Watcher APIs.
- **CANCELLED** : the :ref:`Audit <audit_definition>` was in **PENDING** or
**ONGOING** state and was cancelled by the
:ref:`Administrator <administrator_definition>`
"""
import enum
from watcher.common import exception
from watcher.common import utils
from watcher.db import api as db_api
from watcher import notifications
from watcher import objects
from watcher.objects import base
from watcher.objects import fields as wfields
[docs]class State(object):
ONGOING = 'ONGOING'
SUCCEEDED = 'SUCCEEDED'
FAILED = 'FAILED'
CANCELLED = 'CANCELLED'
DELETED = 'DELETED'
PENDING = 'PENDING'
[docs]class AuditType(enum.Enum):
ONESHOT = 'ONESHOT'
CONTINUOUS = 'CONTINUOUS'
@base.WatcherObjectRegistry.register
[docs]class Audit(base.WatcherPersistentObject, base.WatcherObject,
base.WatcherObjectDictCompat):
# Version 1.0: Initial version
# Version 1.1: Added 'goal' and 'strategy' object field
VERSION = '1.1'
dbapi = db_api.get_instance()
fields = {
'id': wfields.IntegerField(),
'uuid': wfields.UUIDField(),
'audit_type': wfields.StringField(),
'state': wfields.StringField(),
'parameters': wfields.FlexibleDictField(nullable=True),
'interval': wfields.IntegerField(nullable=True),
'scope': wfields.FlexibleListOfDictField(nullable=True),
'goal_id': wfields.IntegerField(),
'strategy_id': wfields.IntegerField(nullable=True),
'goal': wfields.ObjectField('Goal', nullable=True),
'strategy': wfields.ObjectField('Strategy', nullable=True),
}
object_fields = {
'goal': (objects.Goal, 'goal_id'),
'strategy': (objects.Strategy, 'strategy_id'),
}
# Proxified field so we can keep the previous value after an update
_state = None
_old_state = None
# NOTE(v-francoise): The way oslo.versionedobjects works is by using a
# __new__ that will automagically create the attributes referenced in
# fields. These attributes are properties that raise an exception if no
# value has been assigned, which means that they store the actual field
# value in an "_obj_%(field)s" attribute. So because we want to proxify a
# value that is already proxified, we have to do what you see below.
@property
def _obj_state(self):
return self._state
@property
def _obj_old_state(self):
return self._old_state
@property
def old_state(self):
return self._old_state
@_obj_old_state.setter
def _obj_old_state(self, value):
self._old_state = value
@_obj_state.setter
def _obj_state(self, value):
if self._old_state is None and self._state is None:
self._state = value
else:
self._old_state, self._state = self._state, value
@base.remotable_classmethod
[docs] def get(cls, context, audit_id, eager=False):
"""Find a audit based on its id or uuid and return a Audit object.
:param context: Security context. NOTE: This should only
be used internally by the indirection_api.
Unfortunately, RPC requires context as the first
argument, even though we don't use it.
A context should be set when instantiating the
object, e.g.: Audit(context)
:param audit_id: the id *or* uuid of a audit.
:param eager: Load object fields if True (Default: False)
:returns: a :class:`Audit` object.
"""
if utils.is_int_like(audit_id):
return cls.get_by_id(context, audit_id, eager=eager)
elif utils.is_uuid_like(audit_id):
return cls.get_by_uuid(context, audit_id, eager=eager)
else:
raise exception.InvalidIdentity(identity=audit_id)
@base.remotable_classmethod
[docs] def get_by_id(cls, context, audit_id, eager=False):
"""Find a audit based on its integer id and return a Audit object.
:param context: Security context. NOTE: This should only
be used internally by the indirection_api.
Unfortunately, RPC requires context as the first
argument, even though we don't use it.
A context should be set when instantiating the
object, e.g.: Audit(context)
:param audit_id: the id of a audit.
:param eager: Load object fields if True (Default: False)
:returns: a :class:`Audit` object.
"""
db_audit = cls.dbapi.get_audit_by_id(context, audit_id, eager=eager)
audit = cls._from_db_object(cls(context), db_audit, eager=eager)
return audit
@base.remotable_classmethod
[docs] def get_by_uuid(cls, context, uuid, eager=False):
"""Find a audit based on uuid and return a :class:`Audit` object.
:param context: Security context. NOTE: This should only
be used internally by the indirection_api.
Unfortunately, RPC requires context as the first
argument, even though we don't use it.
A context should be set when instantiating the
object, e.g.: Audit(context)
:param uuid: the uuid of a audit.
:param eager: Load object fields if True (Default: False)
:returns: a :class:`Audit` object.
"""
db_audit = cls.dbapi.get_audit_by_uuid(context, uuid, eager=eager)
audit = cls._from_db_object(cls(context), db_audit, eager=eager)
return audit
@base.remotable_classmethod
[docs] def list(cls, context, limit=None, marker=None, filters=None,
sort_key=None, sort_dir=None, eager=False):
"""Return a list of Audit objects.
:param context: Security context. NOTE: This should only
be used internally by the indirection_api.
Unfortunately, RPC requires context as the first
argument, even though we don't use it.
A context should be set when instantiating the
object, e.g.: Audit(context)
:param limit: maximum number of resources to return in a single result.
:param marker: pagination marker for large data sets.
:param filters: Filters to apply. Defaults to None.
:param sort_key: column to sort results by.
:param sort_dir: direction to sort. "asc" or "desc".
:param eager: Load object fields if True (Default: False)
:returns: a list of :class:`Audit` object.
"""
db_audits = cls.dbapi.get_audit_list(context,
limit=limit,
marker=marker,
filters=filters,
sort_key=sort_key,
sort_dir=sort_dir,
eager=eager)
return [cls._from_db_object(cls(context), obj, eager=eager)
for obj in db_audits]
@base.remotable
[docs] def create(self):
"""Create an :class:`Audit` record in the DB.
:returns: An :class:`Audit` object.
"""
values = self.obj_get_changes()
db_audit = self.dbapi.create_audit(values)
# Note(v-francoise): Always load eagerly upon creation so we can send
# notifications containing information about the related relationships
self._from_db_object(self, db_audit, eager=True)
def _notify():
notifications.audit.send_create(self._context, self)
_notify()
@base.remotable
[docs] def destroy(self):
"""Delete the Audit from the DB."""
self.dbapi.destroy_audit(self.uuid)
self.obj_reset_changes()
@base.remotable
[docs] def save(self):
"""Save updates to this Audit.
Updates will be made column by column based on the result
of self.what_changed().
"""
updates = self.obj_get_changes()
self.dbapi.update_audit(self.uuid, updates)
def _notify():
notifications.audit.send_update(
self._context, self, old_state=self.old_state)
_notify()
self.obj_reset_changes()
@base.remotable
[docs] def refresh(self, eager=False):
"""Loads updates for this Audit.
Loads a audit with the same uuid from the database and
checks for updated attributes. Updates are applied from
the loaded audit column by column, if there are any updates.
:param eager: Load object fields if True (Default: False)
"""
current = self.get_by_uuid(self._context, uuid=self.uuid, eager=eager)
self.obj_refresh(current)
@base.remotable
[docs] def soft_delete(self):
"""Soft Delete the Audit from the DB."""
self.dbapi.soft_delete_audit(self.uuid)
self.state = State.DELETED
self.save()
def _notify():
notifications.audit.send_delete(self._context, self)
_notify()