OpenStack Compute (Nova)
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# 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.
import nova.conf
from nova import utils
from nova.virt.libvirt.volume import volume as libvirt_volume
from os_brick import initiator
from os_brick.initiator import connector
from oslo_log import log as logging
LOG = logging.getLogger(__name__)
CONF = nova.conf.CONF
class LibvirtNVMEVolumeDriver(libvirt_volume.LibvirtVolumeDriver):
"""Driver to attach NVMe volumes to libvirt."""
def __init__(self, connection):
super(LibvirtNVMEVolumeDriver,
self).__init__(connection)
self.connector = connector.InitiatorConnector.factory(
initiator.NVME, utils.get_root_helper(),
device_scan_attempts=CONF.libvirt.num_nvme_discover_tries)
def connect_volume(self, connection_info, instance):
device_info = self.connector.connect_volume(
connection_info['data'])
LOG.debug("Connecting NVMe volume with device_info %s",
device_info, instance=instance)
connection_info['data']['device_path'] = device_info['path']
def disconnect_volume(self, connection_info, instance):
"""Detach the volume from the instance."""
LOG.debug("Disconnecting NVMe disk", instance=instance)
self.connector.disconnect_volume(
connection_info['data'], None)
super(LibvirtNVMEVolumeDriver,
self).disconnect_volume(connection_info, instance)
def extend_volume(self, connection_info, instance, requested_size):
"""Extend the volume."""
LOG.debug("calling os-brick to extend NVMe Volume", instance=instance)
new_size = self.connector.extend_volume(connection_info['data'])
LOG.debug("Extend NVMe Volume %s; new_size=%s",
connection_info['data']['device_path'],
new_size, instance=instance)
return new_size