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# Copyright (c) 2017 Veritas Technologies LLC.
# 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.
"""Libvirt volume driver for HyperScale."""
from os_brick import initiator
from os_brick.initiator import connector
from oslo_log import log as logging
from nova import utils
from nova.virt.libvirt.volume import volume as libvirt_volume
LOG = logging.getLogger(__name__)
class LibvirtHyperScaleVolumeDriver(libvirt_volume.LibvirtVolumeDriver):
"""Class HyperScale libvirt volume driver
This class implements a Libvirt volume driver for Veritas
HyperScale storage. The class uses its parent class get_config method,
and calls the Veritas HyperScale os-brick connector to handle the work
of the connect_volume and disconnect volume methods.
"""
def __init__(self, connection):
super(LibvirtHyperScaleVolumeDriver, self).__init__(connection)
self.connector = connector.InitiatorConnector.factory(
initiator.VERITAS_HYPERSCALE, utils.get_root_helper())
def connect_volume(self, connection_info, disk_info, instance):
# The os-brick connector may raise BrickException.
# The convention in nova is to just propagate it up.
# Note that the device path is returned from the os-brick connector
# using the "path" key, LibvirtVolumeDriver.get_config gets the
# device path from the "device_path" key in connection_info.
device_info = self.connector.connect_volume(connection_info['data'])
connection_info['data']['device_path'] = device_info.get('path')
LOG.info("connect_volume: device path %(device_path)s",
{'device_path': connection_info['data']['device_path']})
def disconnect_volume(self, connection_info, disk_dev, instance):
self.connector.disconnect_volume(connection_info['data'], None)
LOG.info("Disconnected volume %(vol_id)s",
{'vol_id': connection_info['data']['name']})
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