c30a9ba5a0
This patch removes logging import unused in karbor Change-Id: I557b029063917a6ce06e0d5d1c6563f3e8b55e83
118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
|
|
"""Base Manager class.
|
|
|
|
Managers are responsible for a certain aspect of the system. It is a logical
|
|
grouping of code relating to a portion of the system. In general other
|
|
components should be using the manager to make changes to the components that
|
|
it is responsible for.
|
|
|
|
We have adopted a basic strategy of Smart managers and dumb data, which means
|
|
rather than attaching methods to data objects, components should call manager
|
|
methods that act on the data.
|
|
|
|
Methods on managers that can be executed locally should be called directly. If
|
|
a particular method must execute on a remote host, this should be done via rpc
|
|
to the service that wraps the manager
|
|
|
|
Managers should be responsible for most of the db access, and
|
|
non-implementation specific data. Anything implementation specific that can't
|
|
be generalized should be done by the Driver.
|
|
|
|
Managers will often provide methods for initial setup of a host or periodic
|
|
tasks to a wrapping service.
|
|
|
|
This module provides Manager, a base class for managers.
|
|
|
|
"""
|
|
|
|
|
|
from oslo_config import cfg
|
|
import oslo_messaging as messaging
|
|
from oslo_service import periodic_task
|
|
|
|
from karbor.db import base
|
|
from karbor import version
|
|
|
|
|
|
CONF = cfg.CONF
|
|
|
|
|
|
class PeriodicTasks(periodic_task.PeriodicTasks):
|
|
def __init__(self):
|
|
super(PeriodicTasks, self).__init__(CONF)
|
|
|
|
|
|
class Manager(base.Base, PeriodicTasks):
|
|
# Set RPC API version to 1.0 by default.
|
|
RPC_API_VERSION = '1.0'
|
|
|
|
target = messaging.Target(version=RPC_API_VERSION)
|
|
|
|
def __init__(self, host=None, db_driver=None):
|
|
if not host:
|
|
host = CONF.host
|
|
self.host = host
|
|
self.additional_endpoints = []
|
|
super(Manager, self).__init__(db_driver)
|
|
|
|
def periodic_tasks(self, context, raise_on_error=False):
|
|
"""Tasks to be run at a periodic interval."""
|
|
return self.run_periodic_tasks(context, raise_on_error=raise_on_error)
|
|
|
|
def init_host(self, **kwargs):
|
|
"""Handle initialization if this is a standalone service.
|
|
|
|
A hook point for services to execute tasks before the services are made
|
|
available (i.e. showing up on RPC and starting to accept RPC calls) to
|
|
other components. Child classes should override this method.
|
|
|
|
"""
|
|
pass
|
|
|
|
def cleanup_host(self):
|
|
"""Hook to do cleanup work when the service shuts down.
|
|
|
|
Child classes should override this method.
|
|
"""
|
|
pass
|
|
|
|
def init_host_with_rpc(self):
|
|
"""A hook for service to do jobs after RPC is ready.
|
|
|
|
Like init_host(), this method is a hook where services get a chance
|
|
to execute tasks that *need* RPC. Child classes should override
|
|
this method.
|
|
|
|
"""
|
|
pass
|
|
|
|
def service_version(self):
|
|
return version.version_string()
|
|
|
|
def service_config(self):
|
|
config = {}
|
|
for key in CONF:
|
|
config[key] = CONF.get(key, None)
|
|
return config
|
|
|
|
def is_working(self):
|
|
"""Method indicating if service is working correctly.
|
|
|
|
This method is supposed to be overridden by subclasses and return if
|
|
manager is working correctly.
|
|
"""
|
|
return True
|