68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import abc
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from oslo_config import cfg
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CONF = cfg.CONF
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class Target(object, metaclass=abc.ABCMeta):
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"""Target object for block storage devices.
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Base class for target object, where target
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is data transport mechanism (target) specific calls.
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This includes things like create targets, attach, detach
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etc.
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Base class here does nothing more than set an executor and db as
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well as force implementation of required methods.
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"""
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def __init__(self, *args, **kwargs):
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self.db = kwargs.get('db')
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self.configuration = kwargs.get('configuration')
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self._root_helper = kwargs.get('root_helper',
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'sudo cinder-rootwrap %s' %
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CONF.rootwrap_config)
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@abc.abstractmethod
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def ensure_export(self, context, volume, volume_path):
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"""Synchronously recreates an export for a volume."""
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pass
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@abc.abstractmethod
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def create_export(self, context, volume, volume_path):
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"""Exports a Target/Volume.
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Can optionally return a Dict of changes to
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the volume object to be persisted.
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"""
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pass
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@abc.abstractmethod
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def remove_export(self, context, volume):
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"""Removes an export for a Target/Volume."""
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pass
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@abc.abstractmethod
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def initialize_connection(self, volume, connector):
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"""Allow connection to connector and return connection info."""
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pass
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@abc.abstractmethod
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def terminate_connection(self, volume, connector, **kwargs):
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"""Disallow connection from connector."""
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pass
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