90060722a9
This patch introduces a new directory layout in doc/source in conformance with the OpenStack manuals project migration spec [1], moves the existing content in manila/doc/source into the new directories, and adjusts index files accordingly. This is the first step in the migration process as outlined in the spec. [1] https://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html Partial-Bug: #1706181 Needed-By: I7924d94b82e7c8d9716bad7a219fc38c57970773 Depends-On: Ifc80fc56648cef74c85464321d1850e8c68449a0 Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454 Change-Id: Ieea33262101a1d2459492c1c8aaac5fe042279f6
56 lines
2.4 KiB
ReStructuredText
56 lines
2.4 KiB
ReStructuredText
..
|
|
Copyright 2010-2011 United States Government as represented by the
|
|
Administrator of the National Aeronautics and Space Administration.
|
|
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.
|
|
|
|
.. _service_manager_driver:
|
|
|
|
Services, Managers and Drivers
|
|
==============================
|
|
|
|
The responsibilities of Services, Managers, and Drivers, can be a bit confusing to people that are new to manila. This document attempts to outline the division of responsibilities to make understanding the system a little bit easier.
|
|
|
|
Currently, Managers and Drivers are specified by flags and loaded using utils.load_object(). This method allows for them to be implemented as singletons, classes, modules or objects. As long as the path specified by the flag leads to an object (or a callable that returns an object) that responds to getattr, it should work as a manager or driver.
|
|
|
|
|
|
The :mod:`manila.service` Module
|
|
--------------------------------
|
|
|
|
.. automodule:: manila.service
|
|
:noindex:
|
|
:members:
|
|
:undoc-members:
|
|
:show-inheritance:
|
|
|
|
|
|
The :mod:`manila.manager` Module
|
|
--------------------------------
|
|
|
|
.. automodule:: manila.manager
|
|
:noindex:
|
|
:members:
|
|
:undoc-members:
|
|
:show-inheritance:
|
|
|
|
|
|
Implementation-Specific Drivers
|
|
-------------------------------
|
|
|
|
A manager will generally load a driver for some of its tasks. The driver is responsible for specific implementation details. Anything running shell commands on a host, or dealing with other non-python code should probably be happening in a driver.
|
|
|
|
Drivers should minimize touching the database, although it is currently acceptable for implementation specific data. This may be reconsidered at some point.
|
|
|
|
It usually makes sense to define an Abstract Base Class for the specific driver (i.e. VolumeDriver), to define the methods that a different driver would need to implement.
|