60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# (c) Copyright 2016 Hewlett-Packard Development Company, L.P.
|
|
#
|
|
# 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.
|
|
|
|
"""Abstract fencer"""
|
|
|
|
import abc
|
|
import six
|
|
|
|
|
|
@six.add_metaclass(abc.ABCMeta)
|
|
class FencerBaseDriver(object):
|
|
|
|
"""Abstract class that all fencer plugins.
|
|
|
|
Should be implemented to have a unified interface and as many plugins as
|
|
needed.
|
|
"""
|
|
|
|
def __init__(self, nodes, fencer_conf):
|
|
"""Initialize the driver.
|
|
|
|
Any fencer driver requires the following parameters to do the api
|
|
calls. All these parameters can be passed from the configuration
|
|
file in /etc/freezer/dr.conf (default).
|
|
|
|
:param nodes: A list of failed nodes to be fenced!
|
|
:param fencer_conf: dict contains configuration options loaded
|
|
from the config file.
|
|
"""
|
|
self.nodes = nodes
|
|
self.fencer_conf = fencer_conf
|
|
|
|
def update_nodes(self, nodes):
|
|
"""Allows changing the nodes during the evacuation..."""
|
|
self.nodes = nodes
|
|
|
|
@abc.abstractmethod
|
|
def fence(self):
|
|
"""This function to be implemented by each driver. Each driver will
|
|
implement its own fencing logic and the manager will just load it and
|
|
call the fence function"""
|
|
|
|
@abc.abstractmethod
|
|
def get_info(self):
|
|
"""Get Driver information.
|
|
|
|
:return: dict of name, version, author, ...
|
|
"""
|