60 lines
2.5 KiB
Python
60 lines
2.5 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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from os_brick import initiator
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from os_brick.initiator import connector
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from oslo_log import log as logging
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from nova import utils
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from nova.virt.libvirt.volume import volume as libvirt_volume
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LOG = logging.getLogger(__name__)
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class LibvirtDRBDVolumeDriver(libvirt_volume.LibvirtVolumeDriver):
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"""Driver to attach DRBD volumes to libvirt."""
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def __init__(self, host):
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super(LibvirtDRBDVolumeDriver, self).__init__(host)
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self.connector = connector.InitiatorConnector.factory(
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initiator.DRBD, utils.get_root_helper())
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def connect_volume(self, connection_info, instance):
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"""Connect the volume.
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Sets the connection_info['data']['device_path'] value upon successful
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connection.
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:param connection_info: dict of connection information for the backend
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storage when a connection was initiated with Cinder. Expects
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connection_info['data']['device'] to be set.
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:param instance: The nova.objects.Instance that is having a volume
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connected to it.
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"""
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LOG.debug("Calling os-brick to attach DRBD Volume.", instance=instance)
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device_info = self.connector.connect_volume(connection_info['data'])
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LOG.debug("Attached DRBD volume %s", device_info, instance=instance)
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connection_info['data']['device_path'] = device_info['path']
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def disconnect_volume(self, connection_info, instance):
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"""Disconnect the volume.
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:param connection_info: dict of connection information for the backend
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storage when a connection was initiated with Cinder.
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:param instance: The nova.objects.Instance that is having a volume
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disconnected from it.
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"""
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LOG.debug("Calling os-brick to detach DRBD Volume.", instance=instance)
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self.connector.disconnect_volume(connection_info['data'], None)
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LOG.debug("Disconnected DRBD Volume", instance=instance)
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