1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
# 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
import tempfile
import time
from os_win.utils import pathutils
from oslo_log import log as logging
import nova.conf
from nova import exception
from nova.i18n import _
from nova.virt.hyperv import constants
LOG = logging.getLogger(__name__)
CONF = nova.conf.CONF
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 and not local_instance_path.startswith(r'\\'):
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,
*args, **kwargs):
vhd_path = None
for format_ext in ['vhd', 'vhdx']:
test_path = vhd_path_func(instance_name, format_ext,
*args, **kwargs)
if self.exists(test_path):
vhd_path = test_path
break
return vhd_path
def lookup_root_vhd_path(self, instance_name, rescue=False):
return self._lookup_vhd_path(instance_name, self.get_root_vhd_path,
rescue)
def lookup_configdrive_path(self, instance_name, rescue=False):
configdrive_path = None
for format_ext in constants.DISK_FORMAT_MAP:
test_path = self.get_configdrive_path(instance_name, format_ext,
rescue=rescue)
if self.exists(test_path):
configdrive_path = test_path
break
return configdrive_path
def lookup_ephemeral_vhd_path(self, instance_name, eph_name):
return self._lookup_vhd_path(instance_name,
self.get_ephemeral_vhd_path,
eph_name)
def get_root_vhd_path(self, instance_name, format_ext, rescue=False):
instance_path = self.get_instance_dir(instance_name)
image_name = 'root'
if rescue:
image_name += '-rescue'
return os.path.join(instance_path,
image_name + '.' + format_ext.lower())
def get_configdrive_path(self, instance_name, format_ext,
remote_server=None, rescue=False):
instance_path = self.get_instance_dir(instance_name, remote_server)
configdrive_image_name = 'configdrive'
if rescue:
configdrive_image_name += '-rescue'
return os.path.join(instance_path,
configdrive_image_name + '.' + format_ext.lower())
def get_ephemeral_vhd_path(self, instance_name, format_ext, eph_name):
instance_path = self.get_instance_dir(instance_name)
return os.path.join(instance_path, eph_name + '.' + 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, instance_name, remote_server=None):
instance_dir = self.get_instance_dir(instance_name,
remote_server)
console_log_path = os.path.join(instance_dir, 'console.log')
return console_log_path, console_log_path + '.1'
def copy_vm_console_logs(self, instance_name, dest_host):
local_log_paths = self.get_vm_console_log_paths(
instance_name)
remote_log_paths = self.get_vm_console_log_paths(
instance_name, remote_server=dest_host)
for local_log_path, remote_log_path in zip(local_log_paths,
remote_log_paths):
if self.exists(local_log_path):
self.copy(local_log_path, remote_log_path)
def get_image_path(self, image_name):
# Note: it is possible that the path doesn't exist
base_dir = self.get_base_vhd_dir()
for ext in ['vhd', 'vhdx']:
file_path = os.path.join(base_dir,
image_name + '.' + ext.lower())
if self.exists(file_path):
return file_path
return None
def get_age_of_file(self, file_name):
return time.time() - os.path.getmtime(file_name)
def check_dirs_shared_storage(self, src_dir, dest_dir):
# Check if shared storage is being used by creating a temporary
# file at the destination path and checking if it exists at the
# source path.
LOG.debug("Checking if %(src_dir)s and %(dest_dir)s point "
"to the same location.",
dict(src_dir=src_dir, dest_dir=dest_dir))
try:
with tempfile.NamedTemporaryFile(dir=dest_dir) as tmp_file:
src_path = os.path.join(src_dir,
os.path.basename(tmp_file.name))
shared_storage = os.path.exists(src_path)
except OSError as e:
raise exception.FileNotFound(str(e))
return shared_storage
def check_remote_instances_dir_shared(self, dest):
# Checks if the instances dir from a remote host points
# to the same storage location as the local instances dir.
local_inst_dir = self.get_instances_dir()
remote_inst_dir = self.get_instances_dir(dest)
return self.check_dirs_shared_storage(local_inst_dir,
remote_inst_dir)
|
