784 lines
32 KiB
Python
784 lines
32 KiB
Python
# 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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"""
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Driver for Linux servers running LVM.
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"""
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import math
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import os
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import socket
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from oslo_concurrency import processutils
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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 excutils
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from oslo_utils import importutils
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from oslo_utils import units
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import six
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from cinder.brick.local_dev import lvm as lvm
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from cinder import exception
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from cinder.i18n import _, _LE, _LI, _LW
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from cinder.image import image_utils
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from cinder import utils
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from cinder.volume import driver
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from cinder.volume import utils as volutils
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LOG = logging.getLogger(__name__)
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# FIXME(jdg): We'll put the lvm_ prefix back on these when we
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# move over to using this as the real LVM driver, for now we'll
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# rename them so that the config generation utility doesn't barf
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# on duplicate entries.
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volume_opts = [
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cfg.StrOpt('volume_group',
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default='cinder-volumes',
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help='Name for the VG that will contain exported volumes'),
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cfg.IntOpt('lvm_mirrors',
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default=0,
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help='If >0, create LVs with multiple mirrors. Note that '
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'this requires lvm_mirrors + 2 PVs with available space'),
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cfg.StrOpt('lvm_type',
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default='default',
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choices=['default', 'thin', 'auto'],
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help='Type of LVM volumes to deploy; (default, thin, or auto). '
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'Auto defaults to thin if thin is supported.'),
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cfg.StrOpt('lvm_conf_file',
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default='/etc/cinder/lvm.conf',
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help='LVM conf file to use for the LVM driver in Cinder; '
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'this setting is ignored if the specified file does '
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'not exist (You can also specify \'None\' to not use '
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'a conf file even if one exists).')
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]
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CONF = cfg.CONF
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CONF.register_opts(volume_opts)
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class LVMVolumeDriver(driver.VolumeDriver):
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"""Executes commands relating to Volumes."""
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VERSION = '3.0.0'
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def __init__(self, vg_obj=None, *args, **kwargs):
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# Parent sets db, host, _execute and base config
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super(LVMVolumeDriver, self).__init__(*args, **kwargs)
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self.configuration.append_config_values(volume_opts)
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self.hostname = socket.gethostname()
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self.vg = vg_obj
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self.backend_name =\
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self.configuration.safe_get('volume_backend_name') or 'LVM'
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# Target Driver is what handles data-transport
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# Transport specific code should NOT be in
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# the driver (control path), this way
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# different target drivers can be added (iscsi, FC etc)
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target_driver = \
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self.target_mapping[self.configuration.safe_get('iscsi_helper')]
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LOG.debug('Attempting to initialize LVM driver with the '
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'following target_driver: %s',
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target_driver)
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self.target_driver = importutils.import_object(
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target_driver,
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configuration=self.configuration,
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db=self.db,
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executor=self._execute)
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self.protocol = self.target_driver.protocol
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self.sparse_copy_volume = False
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def _sizestr(self, size_in_g):
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return '%sg' % size_in_g
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def _volume_not_present(self, volume_name):
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return self.vg.get_volume(volume_name) is None
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def _delete_volume(self, volume, is_snapshot=False):
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"""Deletes a logical volume."""
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if self.configuration.volume_clear != 'none' and \
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self.configuration.lvm_type != 'thin':
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self._clear_volume(volume, is_snapshot)
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name = volume['name']
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if is_snapshot:
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name = self._escape_snapshot(volume['name'])
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self.vg.delete(name)
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def _clear_volume(self, volume, is_snapshot=False):
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# zero out old volumes to prevent data leaking between users
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# TODO(ja): reclaiming space should be done lazy and low priority
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if is_snapshot:
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# if the volume to be cleared is a snapshot of another volume
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# we need to clear out the volume using the -cow instead of the
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# directly volume path. We need to skip this if we are using
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# thin provisioned LVs.
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# bug# lp1191812
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dev_path = self.local_path(volume) + "-cow"
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else:
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dev_path = self.local_path(volume)
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# TODO(jdg): Maybe we could optimize this for snaps by looking at
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# the cow table and only overwriting what's necessary?
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# for now we're still skipping on snaps due to hang issue
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if not os.path.exists(dev_path):
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msg = (_('Volume device file path %s does not exist.')
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% dev_path)
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LOG.error(msg)
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raise exception.VolumeBackendAPIException(data=msg)
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size_in_g = volume.get('volume_size') or volume.get('size')
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if size_in_g is None:
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msg = (_("Size for volume: %s not found, cannot secure delete.")
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% volume['id'])
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LOG.error(msg)
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raise exception.InvalidParameterValue(msg)
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# clear_volume expects sizes in MiB, we store integer GiB
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# be sure to convert before passing in
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vol_sz_in_meg = size_in_g * units.Ki
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volutils.clear_volume(
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vol_sz_in_meg, dev_path,
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volume_clear=self.configuration.volume_clear,
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volume_clear_size=self.configuration.volume_clear_size)
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def _escape_snapshot(self, snapshot_name):
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# Linux LVM reserves name that starts with snapshot, so that
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# such volume name can't be created. Mangle it.
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if not snapshot_name.startswith('snapshot'):
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return snapshot_name
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return '_' + snapshot_name
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def _create_volume(self, name, size, lvm_type, mirror_count, vg=None):
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vg_ref = self.vg
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if vg is not None:
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vg_ref = vg
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vg_ref.create_volume(name, size, lvm_type, mirror_count)
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def _update_volume_stats(self):
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"""Retrieve stats info from volume group."""
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LOG.debug("Updating volume stats")
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if self.vg is None:
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LOG.warning(_LW('Unable to update stats on non-initialized '
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'Volume Group: %s'),
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self.configuration.volume_group)
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return
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self.vg.update_volume_group_info()
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data = {}
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# Note(zhiteng): These information are driver/backend specific,
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# each driver may define these values in its own config options
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# or fetch from driver specific configuration file.
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data["volume_backend_name"] = self.backend_name
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data["vendor_name"] = 'Open Source'
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data["driver_version"] = self.VERSION
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data["storage_protocol"] = self.protocol
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data["pools"] = []
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total_capacity = 0
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free_capacity = 0
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if self.configuration.lvm_mirrors > 0:
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total_capacity =\
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self.vg.vg_mirror_size(self.configuration.lvm_mirrors)
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free_capacity =\
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self.vg.vg_mirror_free_space(self.configuration.lvm_mirrors)
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provisioned_capacity = round(
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float(total_capacity) - float(free_capacity), 2)
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elif self.configuration.lvm_type == 'thin':
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total_capacity = self.vg.vg_thin_pool_size
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free_capacity = self.vg.vg_thin_pool_free_space
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provisioned_capacity = self.vg.vg_provisioned_capacity
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else:
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total_capacity = self.vg.vg_size
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free_capacity = self.vg.vg_free_space
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provisioned_capacity = round(
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float(total_capacity) - float(free_capacity), 2)
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location_info = \
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('LVMVolumeDriver:%(hostname)s:%(vg)s'
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':%(lvm_type)s:%(lvm_mirrors)s' %
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{'hostname': self.hostname,
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'vg': self.configuration.volume_group,
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'lvm_type': self.configuration.lvm_type,
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'lvm_mirrors': self.configuration.lvm_mirrors})
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thin_enabled = self.configuration.lvm_type == 'thin'
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# Calculate the total volumes used by the VG group.
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# This includes volumes and snapshots.
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total_volumes = len(self.vg.get_volumes())
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# Skip enabled_pools setting, treat the whole backend as one pool
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# XXX FIXME if multipool support is added to LVM driver.
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single_pool = {}
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single_pool.update(dict(
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pool_name=data["volume_backend_name"],
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total_capacity_gb=total_capacity,
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free_capacity_gb=free_capacity,
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reserved_percentage=self.configuration.reserved_percentage,
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location_info=location_info,
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QoS_support=False,
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provisioned_capacity_gb=provisioned_capacity,
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max_over_subscription_ratio=(
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self.configuration.max_over_subscription_ratio),
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thin_provisioning_support=thin_enabled,
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thick_provisioning_support=not thin_enabled,
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total_volumes=total_volumes,
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filter_function=self.get_filter_function(),
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goodness_function=self.get_goodness_function(),
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multiattach=True
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))
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data["pools"].append(single_pool)
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# Check availability of sparse volume copy.
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data['sparse_copy_volume'] = self.configuration.lvm_type == 'thin'
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self._stats = data
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def check_for_setup_error(self):
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"""Verify that requirements are in place to use LVM driver."""
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if self.vg is None:
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root_helper = utils.get_root_helper()
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lvm_conf_file = self.configuration.lvm_conf_file
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if lvm_conf_file.lower() == 'none':
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lvm_conf_file = None
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try:
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self.vg = lvm.LVM(self.configuration.volume_group,
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root_helper,
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lvm_type=self.configuration.lvm_type,
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executor=self._execute,
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lvm_conf=lvm_conf_file)
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except exception.VolumeGroupNotFound:
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message = (_("Volume Group %s does not exist") %
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self.configuration.volume_group)
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raise exception.VolumeBackendAPIException(data=message)
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vg_list = volutils.get_all_volume_groups(
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self.configuration.volume_group)
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vg_dict = \
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next(vg for vg in vg_list if vg['name'] == self.vg.vg_name)
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if vg_dict is None:
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message = (_("Volume Group %s does not exist") %
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self.configuration.volume_group)
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raise exception.VolumeBackendAPIException(data=message)
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pool_name = "%s-pool" % self.configuration.volume_group
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if self.configuration.lvm_type == 'auto':
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# Default to thin provisioning if it is supported and
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# the volume group is empty, or contains a thin pool
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# for us to use.
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self.vg.update_volume_group_info()
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self.configuration.lvm_type = 'default'
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if volutils.supports_thin_provisioning():
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if self.vg.get_volume(pool_name) is not None:
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LOG.info(_LI('Enabling LVM thin provisioning by default '
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'because a thin pool exists.'))
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self.configuration.lvm_type = 'thin'
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elif len(self.vg.get_volumes()) == 0:
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LOG.info(_LI('Enabling LVM thin provisioning by default '
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'because no LVs exist.'))
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self.configuration.lvm_type = 'thin'
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if self.configuration.lvm_type == 'thin':
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# Specific checks for using Thin provisioned LV's
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if not volutils.supports_thin_provisioning():
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message = _("Thin provisioning not supported "
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"on this version of LVM.")
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raise exception.VolumeBackendAPIException(data=message)
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if self.vg.get_volume(pool_name) is None:
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try:
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self.vg.create_thin_pool(pool_name)
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except processutils.ProcessExecutionError as exc:
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exception_message = (_("Failed to create thin pool, "
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"error message was: %s")
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% six.text_type(exc.stderr))
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raise exception.VolumeBackendAPIException(
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data=exception_message)
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# Enable sparse copy since lvm_type is 'thin'
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self.sparse_copy_volume = True
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def create_volume(self, volume):
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"""Creates a logical volume."""
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mirror_count = 0
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if self.configuration.lvm_mirrors:
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mirror_count = self.configuration.lvm_mirrors
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self._create_volume(volume['name'],
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self._sizestr(volume['size']),
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self.configuration.lvm_type,
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mirror_count)
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def update_migrated_volume(self, ctxt, volume, new_volume,
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original_volume_status):
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"""Return model update from LVM for migrated volume.
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This method should rename the back-end volume name(id) on the
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destination host back to its original name(id) on the source host.
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:param ctxt: The context used to run the method update_migrated_volume
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:param volume: The original volume that was migrated to this backend
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:param new_volume: The migration volume object that was created on
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this backend as part of the migration process
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:param original_volume_status: The status of the original volume
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:return model_update to update DB with any needed changes
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"""
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name_id = None
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provider_location = None
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if original_volume_status == 'available':
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current_name = CONF.volume_name_template % new_volume['id']
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original_volume_name = CONF.volume_name_template % volume['id']
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try:
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self.vg.rename_volume(current_name, original_volume_name)
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except processutils.ProcessExecutionError:
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LOG.error(_LE('Unable to rename the logical volume '
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'for volume: %s'), volume['id'])
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# If the rename fails, _name_id should be set to the new
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# volume id and provider_location should be set to the
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# one from the new volume as well.
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name_id = new_volume['_name_id'] or new_volume['id']
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provider_location = new_volume['provider_location']
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else:
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# The back-end will not be renamed.
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name_id = new_volume['_name_id'] or new_volume['id']
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provider_location = new_volume['provider_location']
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return {'_name_id': name_id, 'provider_location': provider_location}
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def create_volume_from_snapshot(self, volume, snapshot):
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"""Creates a volume from a snapshot."""
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self._create_volume(volume['name'],
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self._sizestr(volume['size']),
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self.configuration.lvm_type,
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self.configuration.lvm_mirrors)
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# Some configurations of LVM do not automatically activate
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# ThinLVM snapshot LVs.
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self.vg.activate_lv(snapshot['name'], is_snapshot=True)
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# copy_volume expects sizes in MiB, we store integer GiB
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# be sure to convert before passing in
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volutils.copy_volume(self.local_path(snapshot),
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self.local_path(volume),
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snapshot['volume_size'] * units.Ki,
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self.configuration.volume_dd_blocksize,
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execute=self._execute,
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sparse=self.sparse_copy_volume)
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def delete_volume(self, volume):
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"""Deletes a logical volume."""
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# NOTE(jdg): We don't need to explicitly call
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# remove export here because we already did it
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# in the manager before we got here.
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if self._volume_not_present(volume['name']):
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# If the volume isn't present, then don't attempt to delete
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return True
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if self.vg.lv_has_snapshot(volume['name']):
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LOG.error(_LE('Unable to delete due to existing snapshot '
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'for volume: %s'), volume['name'])
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raise exception.VolumeIsBusy(volume_name=volume['name'])
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self._delete_volume(volume)
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LOG.info(_LI('Successfully deleted volume: %s'), volume['id'])
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def create_snapshot(self, snapshot):
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"""Creates a snapshot."""
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self.vg.create_lv_snapshot(self._escape_snapshot(snapshot['name']),
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snapshot['volume_name'],
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self.configuration.lvm_type)
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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if self._volume_not_present(self._escape_snapshot(snapshot['name'])):
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# If the snapshot isn't present, then don't attempt to delete
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LOG.warning(_LW("snapshot: %s not found, "
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"skipping delete operations"), snapshot['name'])
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LOG.info(_LI('Successfully deleted snapshot: %s'), snapshot['id'])
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return True
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# TODO(yamahata): zeroing out the whole snapshot triggers COW.
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# it's quite slow.
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self._delete_volume(snapshot, is_snapshot=True)
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def local_path(self, volume, vg=None):
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if vg is None:
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vg = self.configuration.volume_group
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# NOTE(vish): stops deprecation warning
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escaped_group = vg.replace('-', '--')
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escaped_name = self._escape_snapshot(volume['name']).replace('-', '--')
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return "/dev/mapper/%s-%s" % (escaped_group, escaped_name)
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|
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def copy_image_to_volume(self, context, volume, image_service, image_id):
|
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"""Fetch the image from image_service and write it to the volume."""
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image_utils.fetch_to_raw(context,
|
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image_service,
|
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image_id,
|
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self.local_path(volume),
|
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self.configuration.volume_dd_blocksize,
|
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size=volume['size'])
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def copy_volume_to_image(self, context, volume, image_service, image_meta):
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"""Copy the volume to the specified image."""
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image_utils.upload_volume(context,
|
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image_service,
|
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image_meta,
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self.local_path(volume))
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|
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def create_cloned_volume(self, volume, src_vref):
|
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"""Creates a clone of the specified volume."""
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if self.configuration.lvm_type == 'thin':
|
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self.vg.create_lv_snapshot(volume['name'],
|
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src_vref['name'],
|
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self.configuration.lvm_type)
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if volume['size'] > src_vref['size']:
|
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LOG.debug("Resize the new volume to %s.", volume['size'])
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self.extend_volume(volume, volume['size'])
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self.vg.activate_lv(volume['name'], is_snapshot=True,
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permanent=True)
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return
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|
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mirror_count = 0
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if self.configuration.lvm_mirrors:
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mirror_count = self.configuration.lvm_mirrors
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LOG.info(_LI('Creating clone of volume: %s'), src_vref['id'])
|
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volume_name = src_vref['name']
|
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temp_id = 'tmp-snap-%s' % volume['id']
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temp_snapshot = {'volume_name': volume_name,
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'size': src_vref['size'],
|
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'volume_size': src_vref['size'],
|
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'name': 'clone-snap-%s' % volume['id'],
|
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'id': temp_id}
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|
|
self.create_snapshot(temp_snapshot)
|
|
|
|
# copy_volume expects sizes in MiB, we store integer GiB
|
|
# be sure to convert before passing in
|
|
try:
|
|
self._create_volume(volume['name'],
|
|
self._sizestr(volume['size']),
|
|
self.configuration.lvm_type,
|
|
mirror_count)
|
|
|
|
self.vg.activate_lv(temp_snapshot['name'], is_snapshot=True)
|
|
volutils.copy_volume(
|
|
self.local_path(temp_snapshot),
|
|
self.local_path(volume),
|
|
src_vref['size'] * units.Ki,
|
|
self.configuration.volume_dd_blocksize,
|
|
execute=self._execute,
|
|
sparse=self.sparse_copy_volume)
|
|
finally:
|
|
self.delete_snapshot(temp_snapshot)
|
|
|
|
def clone_image(self, context, volume,
|
|
image_location, image_meta,
|
|
image_service):
|
|
return None, False
|
|
|
|
def backup_volume(self, context, backup, backup_service):
|
|
"""Create a new backup from an existing volume."""
|
|
volume = self.db.volume_get(context, backup.volume_id)
|
|
temp_snapshot = None
|
|
previous_status = volume['previous_status']
|
|
if previous_status == 'in-use':
|
|
temp_snapshot = self._create_temp_snapshot(context, volume)
|
|
backup.temp_snapshot_id = temp_snapshot.id
|
|
backup.save()
|
|
volume_path = self.local_path(temp_snapshot)
|
|
else:
|
|
volume_path = self.local_path(volume)
|
|
|
|
try:
|
|
with utils.temporary_chown(volume_path):
|
|
with open(volume_path) as volume_file:
|
|
backup_service.backup(backup, volume_file)
|
|
finally:
|
|
if temp_snapshot:
|
|
self._delete_temp_snapshot(context, temp_snapshot)
|
|
backup.temp_snapshot_id = None
|
|
backup.save()
|
|
|
|
def restore_backup(self, context, backup, volume, backup_service):
|
|
"""Restore an existing backup to a new or existing volume."""
|
|
volume_path = self.local_path(volume)
|
|
with utils.temporary_chown(volume_path):
|
|
with open(volume_path, 'wb') as volume_file:
|
|
backup_service.restore(backup, volume['id'], volume_file)
|
|
|
|
def get_volume_stats(self, refresh=False):
|
|
"""Get volume status.
|
|
|
|
If 'refresh' is True, run update the stats first.
|
|
"""
|
|
|
|
if refresh:
|
|
self._update_volume_stats()
|
|
|
|
return self._stats
|
|
|
|
def extend_volume(self, volume, new_size):
|
|
"""Extend an existing volume's size."""
|
|
self.vg.extend_volume(volume['name'],
|
|
self._sizestr(new_size))
|
|
|
|
def manage_existing(self, volume, existing_ref):
|
|
"""Manages an existing LV.
|
|
|
|
Renames the LV to match the expected name for the volume.
|
|
Error checking done by manage_existing_get_size is not repeated.
|
|
"""
|
|
lv_name = existing_ref['source-name']
|
|
self.vg.get_volume(lv_name)
|
|
|
|
if volutils.check_already_managed_volume(self.db, lv_name):
|
|
raise exception.ManageExistingAlreadyManaged(volume_ref=lv_name)
|
|
|
|
# Attempt to rename the LV to match the OpenStack internal name.
|
|
try:
|
|
self.vg.rename_volume(lv_name, volume['name'])
|
|
except processutils.ProcessExecutionError as exc:
|
|
exception_message = (_("Failed to rename logical volume %(name)s, "
|
|
"error message was: %(err_msg)s")
|
|
% {'name': lv_name,
|
|
'err_msg': exc.stderr})
|
|
raise exception.VolumeBackendAPIException(
|
|
data=exception_message)
|
|
|
|
def manage_existing_object_get_size(self, existing_object, existing_ref,
|
|
object_type):
|
|
"""Return size of an existing LV for manage existing volume/snapshot.
|
|
|
|
existing_ref is a dictionary of the form:
|
|
{'source-name': <name of LV>}
|
|
"""
|
|
|
|
# Check that the reference is valid
|
|
if 'source-name' not in existing_ref:
|
|
reason = _('Reference must contain source-name element.')
|
|
raise exception.ManageExistingInvalidReference(
|
|
existing_ref=existing_ref, reason=reason)
|
|
lv_name = existing_ref['source-name']
|
|
lv = self.vg.get_volume(lv_name)
|
|
|
|
# Raise an exception if we didn't find a suitable LV.
|
|
if not lv:
|
|
kwargs = {'existing_ref': lv_name,
|
|
'reason': 'Specified logical volume does not exist.'}
|
|
raise exception.ManageExistingInvalidReference(**kwargs)
|
|
|
|
# LV size is returned in gigabytes. Attempt to parse size as a float
|
|
# and round up to the next integer.
|
|
try:
|
|
lv_size = int(math.ceil(float(lv['size'])))
|
|
except ValueError:
|
|
exception_message = (_("Failed to manage existing %(type)s "
|
|
"%(name)s, because reported size %(size)s "
|
|
"was not a floating-point number.")
|
|
% {'type': object_type,
|
|
'name': lv_name,
|
|
'size': lv['size']})
|
|
raise exception.VolumeBackendAPIException(
|
|
data=exception_message)
|
|
return lv_size
|
|
|
|
def manage_existing_get_size(self, volume, existing_ref):
|
|
return self.manage_existing_object_get_size(volume, existing_ref,
|
|
"volume")
|
|
|
|
def manage_existing_snapshot_get_size(self, snapshot, existing_ref):
|
|
if not isinstance(existing_ref, dict):
|
|
existing_ref = {"source-name": existing_ref}
|
|
return self.manage_existing_object_get_size(snapshot, existing_ref,
|
|
"snapshot")
|
|
|
|
def manage_existing_snapshot(self, snapshot, existing_ref):
|
|
dest_name = self._escape_snapshot(snapshot['name'])
|
|
snapshot_temp = {"name": dest_name}
|
|
if not isinstance(existing_ref, dict):
|
|
existing_ref = {"source-name": existing_ref}
|
|
return self.manage_existing(snapshot_temp, existing_ref)
|
|
|
|
def migrate_volume(self, ctxt, volume, host, thin=False, mirror_count=0):
|
|
"""Optimize the migration if the destination is on the same server.
|
|
|
|
If the specified host is another back-end on the same server, and
|
|
the volume is not attached, we can do the migration locally without
|
|
going through iSCSI.
|
|
"""
|
|
|
|
false_ret = (False, None)
|
|
if volume['status'] != 'available':
|
|
return false_ret
|
|
if 'location_info' not in host['capabilities']:
|
|
return false_ret
|
|
info = host['capabilities']['location_info']
|
|
try:
|
|
(dest_type, dest_hostname, dest_vg, lvm_type, lvm_mirrors) =\
|
|
info.split(':')
|
|
lvm_mirrors = int(lvm_mirrors)
|
|
except ValueError:
|
|
return false_ret
|
|
if (dest_type != 'LVMVolumeDriver' or dest_hostname != self.hostname):
|
|
return false_ret
|
|
|
|
if dest_vg != self.vg.vg_name:
|
|
vg_list = volutils.get_all_volume_groups()
|
|
try:
|
|
next(vg for vg in vg_list if vg['name'] == dest_vg)
|
|
except StopIteration:
|
|
LOG.error(_LE("Destination Volume Group %s does not exist"),
|
|
dest_vg)
|
|
return false_ret
|
|
|
|
helper = utils.get_root_helper()
|
|
|
|
lvm_conf_file = self.configuration.lvm_conf_file
|
|
if lvm_conf_file.lower() == 'none':
|
|
lvm_conf_file = None
|
|
|
|
dest_vg_ref = lvm.LVM(dest_vg, helper,
|
|
lvm_type=lvm_type,
|
|
executor=self._execute,
|
|
lvm_conf=lvm_conf_file)
|
|
|
|
self._create_volume(volume['name'],
|
|
self._sizestr(volume['size']),
|
|
lvm_type,
|
|
lvm_mirrors,
|
|
dest_vg_ref)
|
|
# copy_volume expects sizes in MiB, we store integer GiB
|
|
# be sure to convert before passing in
|
|
size_in_mb = int(volume['size']) * units.Ki
|
|
try:
|
|
volutils.copy_volume(self.local_path(volume),
|
|
self.local_path(volume, vg=dest_vg),
|
|
size_in_mb,
|
|
self.configuration.volume_dd_blocksize,
|
|
execute=self._execute,
|
|
sparse=self.sparse_copy_volume)
|
|
except Exception as e:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_LE("Volume migration failed due to "
|
|
"exception: %(reason)s."),
|
|
{'reason': six.text_type(e)}, resource=volume)
|
|
dest_vg_ref.delete(volume)
|
|
self._delete_volume(volume)
|
|
|
|
return (True, None)
|
|
else:
|
|
message = (_("Refusing to migrate volume ID: %(id)s. Please "
|
|
"check your configuration because source and "
|
|
"destination are the same Volume Group: %(name)s.") %
|
|
{'id': volume['id'], 'name': self.vg.vg_name})
|
|
LOG.exception(message)
|
|
raise exception.VolumeBackendAPIException(data=message)
|
|
|
|
def get_pool(self, volume):
|
|
return self.backend_name
|
|
|
|
# ####### Interface methods for DataPath (Target Driver) ########
|
|
|
|
def ensure_export(self, context, volume):
|
|
volume_path = "/dev/%s/%s" % (self.configuration.volume_group,
|
|
volume['name'])
|
|
|
|
model_update = \
|
|
self.target_driver.ensure_export(context, volume, volume_path)
|
|
return model_update
|
|
|
|
def create_export(self, context, volume, connector, vg=None):
|
|
if vg is None:
|
|
vg = self.configuration.volume_group
|
|
|
|
volume_path = "/dev/%s/%s" % (vg, volume['name'])
|
|
|
|
export_info = self.target_driver.create_export(
|
|
context,
|
|
volume,
|
|
volume_path)
|
|
return {'provider_location': export_info['location'],
|
|
'provider_auth': export_info['auth'], }
|
|
|
|
def remove_export(self, context, volume):
|
|
self.target_driver.remove_export(context, volume)
|
|
|
|
def initialize_connection(self, volume, connector):
|
|
return self.target_driver.initialize_connection(volume, connector)
|
|
|
|
def validate_connector(self, connector):
|
|
return self.target_driver.validate_connector(connector)
|
|
|
|
def terminate_connection(self, volume, connector, **kwargs):
|
|
return self.target_driver.terminate_connection(volume, connector,
|
|
**kwargs)
|
|
|
|
|
|
class LVMISCSIDriver(LVMVolumeDriver):
|
|
"""Empty class designation for LVMISCSI.
|
|
|
|
Since we've decoupled the inheritance of iSCSI and LVM we
|
|
don't really need this class any longer. We do however want
|
|
to keep it (at least for now) for back compat in driver naming.
|
|
|
|
"""
|
|
def __init__(self, *args, **kwargs):
|
|
super(LVMISCSIDriver, self).__init__(*args, **kwargs)
|
|
LOG.warning(_LW('LVMISCSIDriver is deprecated, you should '
|
|
'now just use LVMVolumeDriver and specify '
|
|
'iscsi_helper for the target driver you '
|
|
'wish to use.'))
|
|
|
|
|
|
class LVMISERDriver(LVMVolumeDriver):
|
|
"""Empty class designation for LVMISER.
|
|
|
|
Since we've decoupled the inheritance of data path in LVM we
|
|
don't really need this class any longer. We do however want
|
|
to keep it (at least for now) for back compat in driver naming.
|
|
|
|
"""
|
|
def __init__(self, *args, **kwargs):
|
|
super(LVMISERDriver, self).__init__(*args, **kwargs)
|
|
|
|
LOG.warning(_LW('LVMISERDriver is deprecated, you should '
|
|
'now just use LVMVolumeDriver and specify '
|
|
'iscsi_helper for the target driver you '
|
|
'wish to use. In order to enable iser, please '
|
|
'set iscsi_protocol with the value iser.'))
|
|
|
|
LOG.debug('Attempting to initialize LVM driver with the '
|
|
'following target_driver: '
|
|
'cinder.volume.targets.iser.ISERTgtAdm')
|
|
self.target_driver = importutils.import_object(
|
|
'cinder.volume.targets.iser.ISERTgtAdm',
|
|
configuration=self.configuration,
|
|
db=self.db,
|
|
executor=self._execute)
|