3f95d65a61
* num_iscsi_scan_tries - was renamed to num_volume_scan_tries, as the name was misleading. This opt was also moved to the list that is more appropriate for it Change-Id: Icb73ca7e3fcde1ef9b73d2238d8c986d109e459a Implements: bp centralize-config-options-pike
82 lines
3.0 KiB
Python
82 lines
3.0 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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"""Libvirt volume driver for iSCSI"""
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from os_brick import exception as os_brick_exception
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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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import nova.conf
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from nova.i18n import _LW
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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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CONF = nova.conf.CONF
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class LibvirtISCSIVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
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"""Driver to attach Network volumes to libvirt."""
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def __init__(self, host):
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super(LibvirtISCSIVolumeDriver, self).__init__(host,
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is_block_dev=True)
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# Call the factory here so we can support
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# more than x86 architectures.
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self.connector = connector.InitiatorConnector.factory(
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'ISCSI', utils.get_root_helper(),
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use_multipath=CONF.libvirt.volume_use_multipath,
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device_scan_attempts=CONF.libvirt.num_volume_scan_tries,
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transport=self._get_transport())
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def _get_transport(self):
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if CONF.libvirt.iscsi_iface:
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transport = CONF.libvirt.iscsi_iface
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else:
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transport = 'default'
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return transport
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def get_config(self, connection_info, disk_info):
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"""Returns xml for libvirt."""
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conf = super(LibvirtISCSIVolumeDriver,
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self).get_config(connection_info, disk_info)
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conf.source_type = "block"
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conf.source_path = connection_info['data']['device_path']
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conf.driver_io = "native"
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return conf
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def connect_volume(self, connection_info, disk_info):
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"""Attach the volume to instance_name."""
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LOG.debug("Calling os-brick to attach iSCSI Volume")
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device_info = self.connector.connect_volume(connection_info['data'])
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LOG.debug("Attached iSCSI volume %s", device_info)
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connection_info['data']['device_path'] = device_info['path']
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def disconnect_volume(self, connection_info, disk_dev):
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"""Detach the volume from instance_name."""
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LOG.debug("calling os-brick to detach iSCSI Volume")
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try:
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self.connector.disconnect_volume(connection_info['data'], None)
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except os_brick_exception.VolumeDeviceNotFound as exc:
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LOG.warning(_LW('Ignoring VolumeDeviceNotFound: %s'), exc)
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return
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LOG.debug("Disconnected iSCSI Volume %s", disk_dev)
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super(LibvirtISCSIVolumeDriver,
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self).disconnect_volume(connection_info, disk_dev)
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