/usr/lib/python3/dist-packages/os_brick/initiator/connectors/drbd.py is in python3-os-brick 2.3.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
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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 os
import tempfile
from oslo_concurrency import processutils as putils
from os_brick.initiator.connectors import base
from os_brick import utils
class DRBDConnector(base.BaseLinuxConnector):
""""Connector class to attach/detach DRBD resources."""
def __init__(self, root_helper, driver=None,
execute=putils.execute, *args, **kwargs):
super(DRBDConnector, self).__init__(root_helper, driver=driver,
execute=execute, *args, **kwargs)
self._execute = execute
self._root_helper = root_helper
@staticmethod
def get_connector_properties(root_helper, *args, **kwargs):
"""The DRBD connector properties."""
return {}
def check_valid_device(self, path, run_as_root=True):
"""Verify an existing volume."""
# TODO(linbit): check via drbdsetup first, to avoid blocking/hanging
# in case of network problems?
return super(DRBDConnector, self).check_valid_device(path, run_as_root)
def get_all_available_volumes(self, connection_properties=None):
base = "/dev/"
blkdev_list = []
for e in os.listdir(base):
path = base + e
if os.path.isblk(path):
blkdev_list.append(path)
return blkdev_list
def _drbdadm_command(self, cmd, data_dict, sh_secret):
# TODO(linbit): Write that resource file to a permanent location?
tmp = tempfile.NamedTemporaryFile(suffix="res", delete=False, mode="w")
try:
kv = {'shared-secret': sh_secret}
tmp.write(data_dict['config'] % kv)
tmp.close()
(out, err) = self._execute('drbdadm', cmd,
"-c", tmp.name,
data_dict['name'],
run_as_root=True,
root_helper=self._root_helper)
finally:
os.unlink(tmp.name)
return (out, err)
@utils.trace
def connect_volume(self, connection_properties):
"""Attach the volume."""
self._drbdadm_command("adjust", connection_properties,
connection_properties['provider_auth'])
device_info = {
'type': 'block',
'path': connection_properties['device'],
}
return device_info
@utils.trace
def disconnect_volume(self, connection_properties, device_info,
force=False, ignore_errors=False):
"""Detach the volume."""
self._drbdadm_command("down", connection_properties,
connection_properties['provider_auth'])
def get_volume_paths(self, connection_properties):
path = connection_properties['device']
return [path]
def get_search_path(self):
# TODO(linbit): is it allowed to return "/dev", or is that too broad?
return None
def extend_volume(self, connection_properties):
# TODO(walter-boring): is this possible?
raise NotImplementedError
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