1f62a411f4
Our cinder.conf.sample lists all of the options that are defined by drivers in the [DEFAULT] section. Since removal of single-backend config (without enabled_backends) this is misleading as those options are functional only when defined in [<backend_name>] section. This commit aims to move all of the driver options to [backend_defaults] section. Assumption is that this will affect only sample config generation and should not break anything else. Change-Id: Ia4766eb313e15adc92a92875519b22db64e95d65
565 lines
23 KiB
Python
565 lines
23 KiB
Python
# Copyright (c) 2014 Cloudbase Solutions SRL
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import sys
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from os_brick.remotefs import windows_remotefs as remotefs_brick
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from os_win import utilsfactory
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import fileutils
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from oslo_utils import units
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from cinder import context
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from cinder import coordination
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from cinder import exception
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from cinder.i18n import _
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from cinder.image import image_utils
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from cinder import interface
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from cinder import utils
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from cinder.volume import configuration
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from cinder.volume.drivers import remotefs as remotefs_drv
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VERSION = '1.1.0'
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LOG = logging.getLogger(__name__)
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volume_opts = [
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cfg.StrOpt('smbfs_shares_config',
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default=r'C:\OpenStack\smbfs_shares.txt',
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help='File with the list of available smbfs shares.'),
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cfg.StrOpt('smbfs_allocation_info_file_path',
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default=r'C:\OpenStack\allocation_data.txt',
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help=('The path of the automatically generated file containing '
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'information about volume disk space allocation.'),
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deprecated_for_removal=True,
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deprecated_since="11.0.0",
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deprecated_reason="This allocation file is no longer used."),
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cfg.StrOpt('smbfs_default_volume_format',
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default='vhd',
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choices=['vhd', 'vhdx'],
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help=('Default format that will be used when creating volumes '
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'if no volume format is specified.')),
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cfg.BoolOpt('smbfs_sparsed_volumes',
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default=True,
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help=('Create volumes as sparsed files which take no space '
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'rather than regular files when using raw format, '
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'in which case volume creation takes lot of time.')),
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cfg.FloatOpt('smbfs_used_ratio',
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default=0.95,
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help=('Percent of ACTUAL usage of the underlying volume '
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'before no new volumes can be allocated to the volume '
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'destination.')),
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cfg.FloatOpt('smbfs_oversub_ratio',
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default=1.0,
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help=('This will compare the allocated to available space on '
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'the volume destination. If the ratio exceeds this '
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'number, the destination will no longer be valid.')),
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cfg.StrOpt('smbfs_mount_point_base',
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default=r'C:\OpenStack\_mnt',
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help=('Base dir containing mount points for smbfs shares.')),
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cfg.DictOpt('smbfs_pool_mappings',
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default={},
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help=('Mappings between share locations and pool names. '
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'If not specified, the share names will be used as '
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'pool names. Example: '
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'//addr/share:pool_name,//addr/share2:pool_name2')),
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]
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CONF = cfg.CONF
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CONF.register_opts(volume_opts, group=configuration.SHARED_CONF_GROUP)
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@interface.volumedriver
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class WindowsSmbfsDriver(remotefs_drv.RemoteFSPoolMixin,
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remotefs_drv.RemoteFSSnapDriverDistributed):
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VERSION = VERSION
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driver_volume_type = 'smbfs'
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driver_prefix = 'smbfs'
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volume_backend_name = 'Generic_SMBFS'
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SHARE_FORMAT_REGEX = r'//.+/.+'
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VERSION = VERSION
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_DISK_FORMAT_VHD = 'vhd'
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_DISK_FORMAT_VHD_LEGACY = 'vpc'
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_DISK_FORMAT_VHDX = 'vhdx'
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# ThirdPartySystems wiki page
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CI_WIKI_NAME = "Microsoft_iSCSI_CI"
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_MINIMUM_QEMU_IMG_VERSION = '1.6'
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_SUPPORTED_IMAGE_FORMATS = [_DISK_FORMAT_VHD, _DISK_FORMAT_VHDX]
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_VALID_IMAGE_EXTENSIONS = _SUPPORTED_IMAGE_FORMATS
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_always_use_temp_snap_when_cloning = False
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def __init__(self, *args, **kwargs):
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self._remotefsclient = None
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super(WindowsSmbfsDriver, self).__init__(*args, **kwargs)
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self.configuration.append_config_values(volume_opts)
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self.base = getattr(self.configuration,
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'smbfs_mount_point_base')
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self._remotefsclient = remotefs_brick.WindowsRemoteFsClient(
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'cifs', root_helper=None, smbfs_mount_point_base=self.base,
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local_path_for_loopback=True)
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self._vhdutils = utilsfactory.get_vhdutils()
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self._pathutils = utilsfactory.get_pathutils()
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self._smbutils = utilsfactory.get_smbutils()
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self._diskutils = utilsfactory.get_diskutils()
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def do_setup(self, context):
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self._check_os_platform()
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super(WindowsSmbfsDriver, self).do_setup(context)
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image_utils.check_qemu_img_version(self._MINIMUM_QEMU_IMG_VERSION)
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config = self.configuration.smbfs_shares_config
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if not config:
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msg = (_("SMBFS config file not set (smbfs_shares_config)."))
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LOG.error(msg)
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raise exception.SmbfsException(msg)
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if not os.path.exists(config):
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msg = (_("SMBFS config file at %(config)s doesn't exist.") %
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{'config': config})
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LOG.error(msg)
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raise exception.SmbfsException(msg)
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if not os.path.isabs(self.base):
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msg = _("Invalid mount point base: %s") % self.base
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LOG.error(msg)
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raise exception.SmbfsException(msg)
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if not self.configuration.smbfs_oversub_ratio > 0:
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msg = _(
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"SMBFS config 'smbfs_oversub_ratio' invalid. Must be > 0: "
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"%s") % self.configuration.smbfs_oversub_ratio
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LOG.error(msg)
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raise exception.SmbfsException(msg)
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if not 0 < self.configuration.smbfs_used_ratio <= 1:
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msg = _("SMBFS config 'smbfs_used_ratio' invalid. Must be > 0 "
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"and <= 1.0: %s") % self.configuration.smbfs_used_ratio
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LOG.error(msg)
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raise exception.SmbfsException(msg)
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self.shares = {} # address : options
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self._ensure_shares_mounted()
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self._setup_pool_mappings()
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def _setup_pool_mappings(self):
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self._pool_mappings = self.configuration.smbfs_pool_mappings
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pools = list(self._pool_mappings.values())
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duplicate_pools = set([pool for pool in pools
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if pools.count(pool) > 1])
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if duplicate_pools:
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msg = _("Found multiple mappings for pools %(pools)s. "
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"Requested pool mappings: %(pool_mappings)s")
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raise exception.SmbfsException(
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msg % dict(pools=duplicate_pools,
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pool_mappings=self._pool_mappings))
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shares_missing_mappings = (
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set(self.shares).difference(set(self._pool_mappings)))
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for share in shares_missing_mappings:
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msg = ("No pool name was requested for share %(share)s "
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"Using the share name instead.")
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LOG.warning(msg, dict(share=share))
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self._pool_mappings[share] = self._get_share_name(share)
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@coordination.synchronized('{self.driver_prefix}-{volume.id}')
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def initialize_connection(self, volume, connector):
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"""Allow connection to connector and return connection info.
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:param volume: volume reference
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:param connector: connector reference
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"""
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# Find active image
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active_file = self.get_active_image_from_info(volume)
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fmt = self.get_volume_format(volume)
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data = {'export': volume.provider_location,
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'format': fmt,
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'name': active_file}
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if volume.provider_location in self.shares:
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data['options'] = self.shares[volume.provider_location]
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return {
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'driver_volume_type': self.driver_volume_type,
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'data': data,
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'mount_point_base': self._get_mount_point_base()
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}
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def _check_os_platform(self):
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if sys.platform != 'win32':
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_msg = _("This system platform (%s) is not supported. This "
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"driver supports only Win32 platforms.") % sys.platform
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raise exception.SmbfsException(_msg)
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def _get_total_allocated(self, smbfs_share):
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pool_name = self._get_pool_name_from_share(smbfs_share)
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host = "#".join([self.host, pool_name])
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vol_sz_sum = self.db.volume_data_get_for_host(
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context=context.get_admin_context(),
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host=host)[1]
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return float(vol_sz_sum * units.Gi)
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def local_path(self, volume):
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"""Get volume path (mounted locally fs path) for given volume.
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:param volume: volume reference
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"""
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volume_path_template = self._get_local_volume_path_template(volume)
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volume_path = self._lookup_local_volume_path(volume_path_template)
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if volume_path:
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return volume_path
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# The image does not exist, so retrieve the volume format
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# in order to build the path.
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fmt = self.get_volume_format(volume)
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volume_path = volume_path_template + '.' + fmt
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return volume_path
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def _get_local_volume_path_template(self, volume):
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local_dir = self._local_volume_dir(volume)
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local_path_template = os.path.join(local_dir, volume.name)
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return local_path_template
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def _lookup_local_volume_path(self, volume_path_template):
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for ext in self._SUPPORTED_IMAGE_FORMATS:
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volume_path = (volume_path_template + '.' + ext
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if ext else volume_path_template)
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if os.path.exists(volume_path):
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return volume_path
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def _get_new_snap_path(self, snapshot):
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vol_path = self.local_path(snapshot.volume)
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snap_path, ext = os.path.splitext(vol_path)
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snap_path += '.' + snapshot.id + ext
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return snap_path
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def get_volume_format(self, volume, qemu_format=False):
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volume_path_template = self._get_local_volume_path_template(volume)
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volume_path = self._lookup_local_volume_path(volume_path_template)
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if volume_path:
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ext = os.path.splitext(volume_path)[1].strip('.').lower()
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if ext in self._SUPPORTED_IMAGE_FORMATS:
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volume_format = ext
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else:
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# Hyper-V relies on file extensions so we're enforcing them.
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raise exception.SmbfsException(
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_("Invalid image file extension: %s") % ext)
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else:
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volume_format = (
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self._get_volume_format_spec(volume) or
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self.configuration.smbfs_default_volume_format)
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if qemu_format and volume_format == self._DISK_FORMAT_VHD:
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volume_format = self._DISK_FORMAT_VHD_LEGACY
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elif volume_format == self._DISK_FORMAT_VHD_LEGACY:
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volume_format = self._DISK_FORMAT_VHD
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return volume_format
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def _get_volume_format_spec(self, volume):
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vol_type = volume.volume_type
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extra_specs = {}
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if vol_type and vol_type.extra_specs:
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extra_specs = vol_type.extra_specs
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extra_specs.update(volume.metadata or {})
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return (extra_specs.get('volume_format') or
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extra_specs.get('smbfs:volume_format') or
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self.configuration.smbfs_default_volume_format)
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@coordination.synchronized('{self.driver_prefix}-{volume.id}')
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def create_volume(self, volume):
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return super(WindowsSmbfsDriver, self).create_volume(volume)
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def _do_create_volume(self, volume):
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volume_path = self.local_path(volume)
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volume_format = self.get_volume_format(volume)
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volume_size_bytes = volume.size * units.Gi
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if os.path.exists(volume_path):
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err_msg = _('File already exists at: %s') % volume_path
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raise exception.InvalidVolume(err_msg)
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if volume_format not in self._SUPPORTED_IMAGE_FORMATS:
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err_msg = _("Unsupported volume format: %s ") % volume_format
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raise exception.InvalidVolume(err_msg)
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self._vhdutils.create_dynamic_vhd(volume_path, volume_size_bytes)
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def _ensure_share_mounted(self, smbfs_share):
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mnt_flags = None
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if self.shares.get(smbfs_share) is not None:
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mnt_flags = self.shares[smbfs_share]
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self._remotefsclient.mount(smbfs_share, mnt_flags)
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@coordination.synchronized('{self.driver_prefix}-{volume.id}')
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def delete_volume(self, volume):
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"""Deletes a logical volume."""
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if not volume.provider_location:
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LOG.warning('Volume %s does not have provider_location '
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'specified, skipping.', volume.name)
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return
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self._ensure_share_mounted(volume.provider_location)
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volume_dir = self._local_volume_dir(volume)
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mounted_path = os.path.join(volume_dir,
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self.get_active_image_from_info(volume))
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if os.path.exists(mounted_path):
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self._delete(mounted_path)
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else:
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LOG.debug("Skipping deletion of volume %s as it does not exist.",
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mounted_path)
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info_path = self._local_path_volume_info(volume)
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self._delete(info_path)
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def _delete(self, path):
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fileutils.delete_if_exists(path)
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def _get_capacity_info(self, smbfs_share):
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"""Calculate available space on the SMBFS share.
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:param smbfs_share: example //172.18.194.100/var/smbfs
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"""
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mount_point = self._get_mount_point_for_share(smbfs_share)
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total_size, total_available = self._diskutils.get_disk_capacity(
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mount_point)
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total_allocated = self._get_total_allocated(smbfs_share)
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return_value = [total_size, total_available, total_allocated]
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LOG.info('Smb share %(share)s Total size %(size)s '
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'Total allocated %(allocated)s',
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{'share': smbfs_share, 'size': total_size,
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'allocated': total_allocated})
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return [float(x) for x in return_value]
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def _img_commit(self, snapshot_path):
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self._vhdutils.merge_vhd(snapshot_path)
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def _rebase_img(self, image, backing_file, volume_format):
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# Relative path names are not supported in this case.
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image_dir = os.path.dirname(image)
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backing_file_path = os.path.join(image_dir, backing_file)
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self._vhdutils.reconnect_parent_vhd(image, backing_file_path)
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def _qemu_img_info(self, path, volume_name=None):
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# This code expects to deal only with relative filenames.
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# As this method is needed by the upper class and qemu-img does
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# not fully support vhdx images, for the moment we'll use Win32 API
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# for retrieving image information.
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parent_path = self._vhdutils.get_vhd_parent_path(path)
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file_format = os.path.splitext(path)[1][1:].lower()
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if parent_path:
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backing_file_name = os.path.split(parent_path)[1].lower()
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else:
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backing_file_name = None
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class ImageInfo(object):
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def __init__(self, image, backing_file):
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self.image = image
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self.backing_file = backing_file
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self.file_format = file_format
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return ImageInfo(os.path.basename(path),
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backing_file_name)
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def _do_create_snapshot(self, snapshot, backing_file, new_snap_path):
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if snapshot.volume.status == 'in-use':
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LOG.debug("Snapshot is in-use. Performing Nova "
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"assisted creation.")
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return
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backing_file_full_path = os.path.join(
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self._local_volume_dir(snapshot.volume),
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backing_file)
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self._vhdutils.create_differencing_vhd(new_snap_path,
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backing_file_full_path)
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def _extend_volume(self, volume, size_gb):
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self._check_extend_volume_support(volume, size_gb)
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volume_path = self.local_path(volume)
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LOG.info('Resizing file %(volume_path)s to %(size_gb)sGB.',
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dict(volume_path=volume_path, size_gb=size_gb))
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self._vhdutils.resize_vhd(volume_path, size_gb * units.Gi,
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is_file_max_size=False)
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def _delete_snapshot(self, snapshot):
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# NOTE(lpetrut): We're slightly diverging from the super class
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# workflow. The reason is that we cannot query in-use vhd/x images,
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# nor can we add or remove images from a vhd/x chain in this case.
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volume_status = snapshot.volume.status
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if volume_status != 'in-use':
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return super(WindowsSmbfsDriver, self)._delete_snapshot(snapshot)
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info_path = self._local_path_volume_info(snapshot.volume)
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snap_info = self._read_info_file(info_path, empty_if_missing=True)
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if snapshot.id not in snap_info:
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LOG.info('Snapshot record for %s is not present, allowing '
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'snapshot_delete to proceed.', snapshot.id)
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return
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file_to_merge = snap_info[snapshot.id]
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delete_info = {'file_to_merge': file_to_merge,
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'volume_id': snapshot.volume.id}
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self._nova_assisted_vol_snap_delete(
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snapshot._context, snapshot, delete_info)
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# At this point, the image file should no longer be in use, so we
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# may safely query it so that we can update the 'active' image
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# reference, if needed.
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merged_img_path = os.path.join(
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self._local_volume_dir(snapshot.volume),
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file_to_merge)
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if utils.paths_normcase_equal(snap_info['active'], file_to_merge):
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new_active_file_path = self._vhdutils.get_vhd_parent_path(
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merged_img_path).lower()
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snap_info['active'] = os.path.basename(new_active_file_path)
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self._delete(merged_img_path)
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# TODO(lpetrut): drop snapshot info file usage.
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del(snap_info[snapshot.id])
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self._write_info_file(info_path, snap_info)
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def _check_extend_volume_support(self, volume, size_gb):
|
|
volume_path = self.local_path(volume)
|
|
active_file = self.get_active_image_from_info(volume)
|
|
active_file_path = os.path.join(self._local_volume_dir(volume),
|
|
active_file)
|
|
|
|
if not utils.paths_normcase_equal(active_file_path, volume_path):
|
|
msg = _('Extend volume is only supported for this '
|
|
'driver when no snapshots exist.')
|
|
raise exception.InvalidVolume(msg)
|
|
|
|
@coordination.synchronized('{self.driver_prefix}-{volume.id}')
|
|
def copy_volume_to_image(self, context, volume, image_service, image_meta):
|
|
"""Copy the volume to the specified image."""
|
|
|
|
# If snapshots exist, flatten to a temporary image, and upload it
|
|
|
|
active_file = self.get_active_image_from_info(volume)
|
|
active_file_path = os.path.join(self._local_volume_dir(volume),
|
|
active_file)
|
|
backing_file = self._vhdutils.get_vhd_parent_path(active_file_path)
|
|
root_file_fmt = self.get_volume_format(volume)
|
|
|
|
temp_path = None
|
|
|
|
try:
|
|
if backing_file:
|
|
temp_file_name = '%s.temp_image.%s.%s' % (
|
|
volume.id,
|
|
image_meta['id'],
|
|
root_file_fmt)
|
|
temp_path = os.path.join(self._local_volume_dir(volume),
|
|
temp_file_name)
|
|
|
|
self._vhdutils.convert_vhd(active_file_path, temp_path)
|
|
upload_path = temp_path
|
|
else:
|
|
upload_path = active_file_path
|
|
|
|
image_utils.upload_volume(context,
|
|
image_service,
|
|
image_meta,
|
|
upload_path,
|
|
root_file_fmt)
|
|
finally:
|
|
if temp_path:
|
|
self._delete(temp_path)
|
|
|
|
def copy_image_to_volume(self, context, volume, image_service, image_id):
|
|
"""Fetch the image from image_service and write it to the volume."""
|
|
volume_path = self.local_path(volume)
|
|
volume_format = self.get_volume_format(volume, qemu_format=True)
|
|
self._delete(volume_path)
|
|
|
|
image_utils.fetch_to_volume_format(
|
|
context, image_service, image_id,
|
|
volume_path, volume_format,
|
|
self.configuration.volume_dd_blocksize)
|
|
|
|
self._vhdutils.resize_vhd(self.local_path(volume),
|
|
volume.size * units.Gi,
|
|
is_file_max_size=False)
|
|
|
|
def _copy_volume_from_snapshot(self, snapshot, volume, volume_size):
|
|
"""Copy data from snapshot to destination volume."""
|
|
|
|
LOG.debug("snapshot: %(snap)s, volume: %(vol)s, "
|
|
"volume_size: %(size)s",
|
|
{'snap': snapshot.id,
|
|
'vol': volume.id,
|
|
'size': snapshot.volume_size})
|
|
|
|
info_path = self._local_path_volume_info(snapshot.volume)
|
|
snap_info = self._read_info_file(info_path)
|
|
vol_dir = self._local_volume_dir(snapshot.volume)
|
|
|
|
forward_file = snap_info[snapshot.id]
|
|
forward_path = os.path.join(vol_dir, forward_file)
|
|
|
|
# Find the file which backs this file, which represents the point
|
|
# when this snapshot was created.
|
|
img_info = self._qemu_img_info(forward_path)
|
|
snapshot_path = os.path.join(vol_dir, img_info.backing_file)
|
|
|
|
volume_path = self.local_path(volume)
|
|
self._delete(volume_path)
|
|
self._vhdutils.convert_vhd(snapshot_path,
|
|
volume_path)
|
|
self._vhdutils.resize_vhd(volume_path, volume_size * units.Gi,
|
|
is_file_max_size=False)
|
|
|
|
def _copy_volume_image(self, src_path, dest_path):
|
|
self._pathutils.copy(src_path, dest_path)
|
|
|
|
def _get_share_name(self, share):
|
|
return share.replace('/', '\\').lstrip('\\').split('\\', 1)[1]
|
|
|
|
def _get_pool_name_from_share(self, share):
|
|
return self._pool_mappings[share]
|
|
|
|
def _get_share_from_pool_name(self, pool_name):
|
|
mappings = {pool: share
|
|
for share, pool in self._pool_mappings.items()}
|
|
share = mappings.get(pool_name)
|
|
|
|
if not share:
|
|
msg = _("Could not find any share for pool %(pool_name)s. "
|
|
"Pool mappings: %(pool_mappings)s.")
|
|
raise exception.SmbfsException(
|
|
msg % dict(pool_name=pool_name,
|
|
pool_mappings=self._pool_mappings))
|
|
return share
|