70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
# (c) Copyright 2016 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Abstract fencer"""
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import abc
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import six
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@six.add_metaclass(abc.ABCMeta)
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class FencerBaseDriver(object):
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"""Abstract class that all fencer plugins.
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Should be implemented to have a unified interface and as many plugins as
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needed.
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"""
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def __init__(self, node, **kwargs):
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"""Initialize the driver.
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Any fencer driver requires the following parameters to do the api
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calls. All these parameters can be passed from the configuration
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file in /etc/osha/osha.conf (default).
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:param node: dict with all node details. (/etc/osha/servers.yml) ?
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:param kwargs: any additional parameters can be passed using this
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config option.
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"""
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self.node = node
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self.kwargs = kwargs
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@abc.abstractmethod
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def graceful_shutdown(self):
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"""Gracefully shutdown the compute node to evacuate it."""
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@abc.abstractmethod
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def force_shutdown(self):
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"""Force shutdown the compute node to evacuate it.
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May be you can try force shutdown if the graceful shutdown failed.
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"""
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@abc.abstractmethod
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def status(self):
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"""Get compute node status.
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Should return 1 if on and 0 if off or -1 if error or unknown power
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status.
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"""
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@abc.abstractmethod
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def get_info(self):
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"""Get Driver information.
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:return: dict of name, version, author, ...
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"""
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