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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.virt.libvirt.volume import fs
CONF = nova.conf.CONF
class LibvirtNFSVolumeDriver(fs.LibvirtMountedFileSystemVolumeDriver):
"""Class implements libvirt part of volume driver for NFS."""
def __init__(self, connection):
super(LibvirtNFSVolumeDriver, self).__init__(connection, 'nfs')
def _get_mount_point_base(self):
return CONF.libvirt.nfs_mount_point_base
def get_config(self, connection_info, disk_info):
"""Returns xml for libvirt."""
conf = super(LibvirtNFSVolumeDriver,
self).get_config(connection_info, disk_info)
conf.source_type = 'file'
conf.source_path = connection_info['data']['device_path']
conf.driver_format = connection_info['data'].get('format', 'raw')
conf.driver_io = "native"
return conf
def _mount_options(self, connection_info):
options = []
if CONF.libvirt.nfs_mount_options is not None:
options.extend(['-o', CONF.libvirt.nfs_mount_options])
conn_options = connection_info['data'].get('options')
if conn_options:
options.extend(conn_options.split(' '))
return options
def extend_volume(self, connection_info, instance, requested_size):
# There is nothing to do for NFS volumes. libvirt will extend the file
# on the NFS share, and resize the disk device within the instance by
# calling virDomainBlockResize.
return requested_size
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