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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 exception
from nova.i18n import _
from nova import utils
from nova.virt.libvirt.volume import volume as libvirt_volume
CONF = nova.conf.CONF
class LibvirtNetVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
"""Driver to attach Network volumes to libvirt."""
def __init__(self, connection):
super(LibvirtNetVolumeDriver,
self).__init__(connection, is_block_dev=False)
def _get_secret_uuid(self, conf, password=None):
# TODO(mriedem): Add delegation methods to connection (LibvirtDriver)
# to call through for these secret CRUD operations so the volume driver
# doesn't need to know the internal attributes of the connection
# object.
secret = self.connection._host.find_secret(conf.source_protocol,
conf.source_name)
if secret is None:
secret = self.connection._host.create_secret(conf.source_protocol,
conf.source_name,
password)
return secret.UUIDString()
def _delete_secret_by_name(self, connection_info):
source_protocol = connection_info['driver_volume_type']
netdisk_properties = connection_info['data']
if source_protocol == 'rbd':
return
elif source_protocol == 'iscsi':
usage_type = 'iscsi'
usage_name = ("%(target_iqn)s/%(target_lun)s" %
netdisk_properties)
self.connection._host.delete_secret(usage_type, usage_name)
def get_config(self, connection_info, disk_info):
"""Returns xml for libvirt."""
conf = super(LibvirtNetVolumeDriver,
self).get_config(connection_info, disk_info)
netdisk_properties = connection_info['data']
conf.source_type = "network"
conf.source_protocol = connection_info['driver_volume_type']
conf.source_name = netdisk_properties.get('name')
conf.source_hosts = netdisk_properties.get('hosts', [])
conf.source_ports = netdisk_properties.get('ports', [])
auth_enabled = netdisk_properties.get('auth_enabled')
if (conf.source_protocol == 'rbd' and
CONF.libvirt.rbd_secret_uuid):
conf.auth_secret_uuid = CONF.libvirt.rbd_secret_uuid
auth_enabled = True # Force authentication locally
if CONF.libvirt.rbd_user:
conf.auth_username = CONF.libvirt.rbd_user
if conf.source_protocol == 'iscsi':
try:
conf.source_name = ("%(target_iqn)s/%(target_lun)s" %
netdisk_properties)
target_portal = netdisk_properties['target_portal']
except KeyError:
raise exception.NovaException(_("Invalid volume source data"))
ip, port = utils.parse_server_string(target_portal)
if ip == '' or port == '':
raise exception.NovaException(_("Invalid target_lun"))
conf.source_hosts = [ip]
conf.source_ports = [port]
if netdisk_properties.get('auth_method') == 'CHAP':
auth_enabled = True
conf.auth_secret_type = 'iscsi'
password = netdisk_properties.get('auth_password')
conf.auth_secret_uuid = self._get_secret_uuid(conf, password)
if auth_enabled:
conf.auth_username = (conf.auth_username or
netdisk_properties['auth_username'])
conf.auth_secret_type = (conf.auth_secret_type or
netdisk_properties['secret_type'])
conf.auth_secret_uuid = (conf.auth_secret_uuid or
netdisk_properties['secret_uuid'])
return conf
def disconnect_volume(self, connection_info, disk_dev):
"""Detach the volume from instance_name."""
super(LibvirtNetVolumeDriver,
self).disconnect_volume(connection_info, disk_dev)
self._delete_secret_by_name(connection_info)
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