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# Copyright 2013 Cloudbase Solutions Srl
# 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 os
from os_win.utils import pathutils
from oslo_config import cfg
from oslo_log import log as logging
from nova import exception
from nova.i18n import _
from nova.virt.hyperv import constants
LOG = logging.getLogger(__name__)
hyperv_opts = [
cfg.StrOpt('instances_path_share',
default="",
help='The name of a Windows share name mapped to the '
'"instances_path" dir and used by the resize feature '
'to copy files to the target host. If left blank, an '
'administrative share will be used, looking for the same '
'"instances_path" used locally'),
]
CONF = cfg.CONF
CONF.register_opts(hyperv_opts, 'hyperv')
CONF.import_opt('instances_path', 'nova.compute.manager')
ERROR_INVALID_NAME = 123
# NOTE(claudiub): part of the pre-existing PathUtils is nova-specific and
# it does not belong in the os-win library. In order to ensure the same
# functionality with the least amount of changes necessary, adding as a mixin
# the os_win.pathutils.PathUtils class into this PathUtils.
class PathUtils(pathutils.PathUtils):
def get_instances_dir(self, remote_server=None):
local_instance_path = os.path.normpath(CONF.instances_path)
if remote_server:
if CONF.hyperv.instances_path_share:
path = CONF.hyperv.instances_path_share
else:
# Use an administrative share
path = local_instance_path.replace(':', '$')
return ('\\\\%(remote_server)s\\%(path)s' %
{'remote_server': remote_server, 'path': path})
else:
return local_instance_path
def _get_instances_sub_dir(self, dir_name, remote_server=None,
create_dir=True, remove_dir=False):
instances_path = self.get_instances_dir(remote_server)
path = os.path.join(instances_path, dir_name)
try:
if remove_dir:
self.check_remove_dir(path)
if create_dir:
self.check_create_dir(path)
return path
except WindowsError as ex:
if ex.winerror == ERROR_INVALID_NAME:
raise exception.AdminRequired(_(
"Cannot access \"%(instances_path)s\", make sure the "
"path exists and that you have the proper permissions. "
"In particular Nova-Compute must not be executed with the "
"builtin SYSTEM account or other accounts unable to "
"authenticate on a remote host.") %
{'instances_path': instances_path})
raise
def get_instance_migr_revert_dir(self, instance_name, create_dir=False,
remove_dir=False):
dir_name = '%s_revert' % instance_name
return self._get_instances_sub_dir(dir_name, None, create_dir,
remove_dir)
def get_instance_dir(self, instance_name, remote_server=None,
create_dir=True, remove_dir=False):
return self._get_instances_sub_dir(instance_name, remote_server,
create_dir, remove_dir)
def _lookup_vhd_path(self, instance_name, vhd_path_func):
vhd_path = None
for format_ext in ['vhd', 'vhdx']:
test_path = vhd_path_func(instance_name, format_ext)
if self.exists(test_path):
vhd_path = test_path
break
return vhd_path
def lookup_root_vhd_path(self, instance_name):
return self._lookup_vhd_path(instance_name, self.get_root_vhd_path)
def lookup_configdrive_path(self, instance_name):
configdrive_path = None
for format_ext in constants.DISK_FORMAT_MAP:
test_path = self.get_configdrive_path(instance_name, format_ext)
if self.exists(test_path):
configdrive_path = test_path
break
return configdrive_path
def lookup_ephemeral_vhd_path(self, instance_name):
return self._lookup_vhd_path(instance_name,
self.get_ephemeral_vhd_path)
def get_root_vhd_path(self, instance_name, format_ext):
instance_path = self.get_instance_dir(instance_name)
return os.path.join(instance_path, 'root.' + format_ext.lower())
def get_configdrive_path(self, instance_name, format_ext,
remote_server=None):
instance_path = self.get_instance_dir(instance_name, remote_server)
return os.path.join(instance_path, 'configdrive.' + format_ext.lower())
def get_ephemeral_vhd_path(self, instance_name, format_ext):
instance_path = self.get_instance_dir(instance_name)
return os.path.join(instance_path, 'ephemeral.' + format_ext.lower())
def get_base_vhd_dir(self):
return self._get_instances_sub_dir('_base')
def get_export_dir(self, instance_name):
dir_name = os.path.join('export', instance_name)
return self._get_instances_sub_dir(dir_name, create_dir=True,
remove_dir=True)
def get_vm_console_log_paths(self, vm_name, remote_server=None):
instance_dir = self.get_instance_dir(vm_name,
remote_server)
console_log_path = os.path.join(instance_dir, 'console.log')
return console_log_path, console_log_path + '.1'
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