86 lines
3.5 KiB
Python
86 lines
3.5 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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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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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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class LibvirtFibreChannelVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
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"""Driver to attach Fibre Channel Network volumes to libvirt."""
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def __init__(self, host):
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super(LibvirtFibreChannelVolumeDriver,
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self).__init__(host, is_block_dev=False)
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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.FIBRE_CHANNEL, 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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def get_config(self, connection_info, disk_info):
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"""Returns xml for libvirt."""
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conf = super(LibvirtFibreChannelVolumeDriver,
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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 FC Volume", instance=instance)
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device_info = self.connector.connect_volume(connection_info['data'])
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LOG.debug("Attached FC volume %s", device_info, instance=instance)
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connection_info['data']['device_path'] = device_info['path']
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if 'multipath_id' in device_info:
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connection_info['data']['multipath_id'] = \
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device_info['multipath_id']
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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 FC Volume", instance=instance)
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# TODO(walter-boring) eliminated the need for preserving
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# multipath_id. Use scsi_id instead of multipath -ll
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# This will then eliminate the need to pass anything in
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# the 2nd param of disconnect_volume and be consistent
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# with the rest of the connectors.
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self.connector.disconnect_volume(connection_info['data'],
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connection_info['data'])
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LOG.debug("Disconnected FC Volume", instance=instance)
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super(LibvirtFibreChannelVolumeDriver,
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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 FC Volume", instance=instance)
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new_size = self.connector.extend_volume(connection_info['data'])
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LOG.debug("Extend FC Volume %s; new_size=%s",
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connection_info['data']['device_path'],
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new_size, instance=instance)
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return new_size
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