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89 lines
3.5 KiB
89 lines
3.5 KiB
# 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 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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import nova.conf |
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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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initiator.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, instance): |
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"""Attach the volume to instance_name.""" |
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LOG.debug("Calling os-brick to attach iSCSI Volume", instance=instance) |
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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, 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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"""Detach the volume from instance_name.""" |
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LOG.debug("calling os-brick to detach iSCSI Volume", instance=instance) |
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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('Ignoring VolumeDeviceNotFound: %s', exc) |
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return |
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LOG.debug("Disconnected iSCSI Volume", instance=instance) |
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super(LibvirtISCSIVolumeDriver, |
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self).disconnect_volume(connection_info, instance) |
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def extend_volume(self, connection_info, instance, requested_size): |
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"""Extend the volume.""" |
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LOG.debug("calling os-brick to extend iSCSI Volume", instance=instance) |
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new_size = self.connector.extend_volume(connection_info['data']) |
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LOG.debug("Extend iSCSI Volume: new_size=%s", |
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new_size, instance=instance) |
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return new_size
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