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# Copyright 2023 Red Hat, Inc.
# All Rights Reserved.
#
# 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 hashlib
import logging
import os
import socket
from oslo_config import cfg
from glance_store._drivers.cinder import base
from glance_store.common import cinder_utils
from glance_store.common import fs_mount as mount
from glance_store.common import utils
from glance_store import exceptions
from glance_store.i18n import _
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class NfsBrickConnector(base.BaseBrickConnectorInterface):
def __init__(self, *args, **kwargs):
self.volume = kwargs.get('volume')
self.connection_info = kwargs.get('connection_info')
self.root_helper = kwargs.get('root_helper')
self.mount_point_base = kwargs.get('mountpoint_base')
self.attachment_obj = kwargs.get('attachment_obj')
self.client = kwargs.get('client')
self.host = socket.gethostname()
self.volume_api = cinder_utils.API()
def _get_mount_path(self, share, mount_point_base):
"""Returns the mount path prefix using the mount point base and share.
:returns: The mount path prefix.
"""
return os.path.join(self.mount_point_base,
NfsBrickConnector.get_hash_str(share))
@staticmethod
def get_hash_str(base_str):
"""Returns string representing SHA256 hash of base_str in hex format.
If base_str is a Unicode string, encode it to UTF-8.
"""
if isinstance(base_str, str):
base_str = base_str.encode('utf-8')
return hashlib.sha256(base_str).hexdigest()
def connect_volume(self, volume):
# The format info of nfs volumes is exposed via attachment_get
# API hence it is not available in the connection info of
# attachment object received from attachment_update and we
# need to do this call
vol_attachment = self.volume_api.attachment_get(
self.client, self.attachment_obj.id)
if (volume.encrypted or
vol_attachment.connection_info['format'] == 'qcow2'):
issue_type = 'Encrypted' if volume.encrypted else 'qcow2'
msg = (_('%(issue_type)s volume creation for cinder nfs '
'is not supported from glance_store. Failed to '
'create volume %(volume_id)s')
% {'issue_type': issue_type,
'volume_id': volume.id})
LOG.error(msg)
raise exceptions.BackendException(msg)
@utils.synchronized(self.connection_info['export'])
def connect_volume_nfs():
export = self.connection_info['export']
vol_name = self.connection_info['name']
mountpoint = self._get_mount_path(
export, os.path.join(self.mount_point_base, 'nfs'))
options = self.connection_info['options']
mount.mount(
'nfs', export, vol_name, mountpoint, self.host,
self.root_helper, options)
return {'path': os.path.join(mountpoint, vol_name)}
device = connect_volume_nfs()
return device
def disconnect_volume(self, device):
@utils.synchronized(self.connection_info['export'])
def disconnect_volume_nfs():
path, vol_name = device['path'].rsplit('/', 1)
mount.umount(vol_name, path, self.host,
self.root_helper)
disconnect_volume_nfs()
def extend_volume(self):
raise NotImplementedError
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