def _dd_copy(self, vol_params, src_snap, src_lun=None):
"""Creates a volume via copying a Unity snapshot.
It attaches the `volume` and `snap`, then use `dd` to copy the
data from the Unity snapshot to the `volume`.
"""
dest_lun = self.client.create_lun(
name=vol_params.name,
size=vol_params.size,
pool=vol_params.pool,
description=vol_params.description,
io_limit_policy=vol_params.io_limit_policy,
is_thin=False if vol_params.is_thick else None,
is_compressed=vol_params.is_compressed)
src_id = src_snap.get_id()
try:
conn_props = cinder_utils.brick_get_connector_properties()
with self._connect_resource(dest_lun, conn_props,
vol_params.volume_id) as dest_info, \
self._connect_resource(src_snap, conn_props,
src_id) as src_info:
if src_lun is None:
# If size is not specified, need to get the size from LUN
# of snapshot.
lun = self.client.get_lun(
lun_id=src_snap.storage_resource.get_id())
size_in_m = utils.byte_to_mib(lun.size_total)
else:
size_in_m = utils.byte_to_mib(src_lun.size_total)
vol_utils.copy_volume(
src_info['device']['path'],
dest_info['device']['path'],
size_in_m,
self.driver.configuration.volume_dd_blocksize,
sparse=True)
except Exception:
with excutils.save_and_reraise_exception():
utils.ignore_exception(self.client.delete_lun,
dest_lun.get_id())
LOG.error(
'Failed to create cloned volume: %(vol_id)s, '
'from source unity snapshot: %(snap_name)s.', {
'vol_id': vol_params.volume_id,
'snap_name': src_snap.name
})
return dest_lun
def _dd_copy(self, vol_params, src_snap, src_lun=None):
"""Creates a volume via copying a Unity snapshot.
It attaches the `volume` and `snap`, then use `dd` to copy the
data from the Unity snapshot to the `volume`.
"""
dest_lun = self.client.create_lun(
name=vol_params.name, size=vol_params.size, pool=vol_params.pool,
description=vol_params.description,
io_limit_policy=vol_params.io_limit_policy)
src_id = src_snap.get_id()
try:
conn_props = cinder_utils.brick_get_connector_properties()
with self._connect_resource(dest_lun, conn_props,
vol_params.volume_id) as dest_info, \
self._connect_resource(src_snap, conn_props,
src_id) as src_info:
if src_lun is None:
# If size is not specified, need to get the size from LUN
# of snapshot.
lun = self.client.get_lun(
lun_id=src_snap.storage_resource.get_id())
size_in_m = utils.byte_to_mib(lun.size_total)
else:
size_in_m = utils.byte_to_mib(src_lun.size_total)
vol_utils.copy_volume(
src_info['device']['path'],
dest_info['device']['path'],
size_in_m,
self.driver.configuration.volume_dd_blocksize,
sparse=True)
except Exception:
with excutils.save_and_reraise_exception():
utils.ignore_exception(self.client.delete_lun,
dest_lun.get_id())
LOG.error('Failed to create cloned volume: %(vol_id)s, '
'from source unity snapshot: %(snap_name)s.',
{'vol_id': vol_params.volume_id,
'snap_name': src_snap.name})
return dest_lun
def _create_volume_from_snap(self, volume, snap, size_in_m=None):
"""Creates a volume from a Unity snapshot.
It attaches the `volume` and `snap`, then use `dd` to copy the
data from the Unity snapshot to the `volume`.
"""
model_update = self.create_volume(volume)
# Update `provider_location` and `provider_id` of `volume` explicitly.
volume.update(model_update)
src_id = snap.get_id()
dest_lun = self.client.get_lun(lun_id=self.get_lun_id(volume))
try:
conn_props = cinder_utils.brick_get_connector_properties()
with self._connect_resource(dest_lun, conn_props,
volume.id) as dest_info, \
self._connect_resource(snap, conn_props,
src_id) as src_info:
if size_in_m is None:
# If size is not specified, need to get the size from LUN
# of snapshot.
lun = self.client.get_lun(
lun_id=snap.storage_resource.get_id())
size_in_m = utils.byte_to_mib(lun.size_total)
vol_utils.copy_volume(
src_info['device']['path'],
dest_info['device']['path'],
size_in_m,
self.driver.configuration.volume_dd_blocksize,
sparse=True)
except Exception:
with excutils.save_and_reraise_exception():
utils.ignore_exception(self.delete_volume, volume)
LOG.error(
'Failed to create cloned volume: %(vol_id)s, '
'from source unity snapshot: %(snap_name)s.', {
'vol_id': volume.id,
'snap_name': snap.name
})
return model_update
def _create_volume_from_snap(self, volume, snap, size_in_m=None):
"""Creates a volume from a Unity snapshot.
It attaches the `volume` and `snap`, then use `dd` to copy the
data from the Unity snapshot to the `volume`.
"""
model_update = self.create_volume(volume)
volume.provider_location = model_update['provider_location']
src_id = snap.get_id()
dest_lun = self.client.get_lun(lun_id=self.get_lun_id(volume))
try:
conn_props = cinder_utils.brick_get_connector_properties()
with self._connect_resource(dest_lun, conn_props,
volume.id) as dest_info, \
self._connect_resource(snap, conn_props,
src_id) as src_info:
if size_in_m is None:
# If size is not specified, need to get the size from LUN
# of snapshot.
lun = self.client.get_lun(
lun_id=snap.storage_resource.get_id())
size_in_m = utils.byte_to_mib(lun.size_total)
vol_utils.copy_volume(
src_info['device']['path'],
dest_info['device']['path'],
size_in_m,
self.driver.configuration.volume_dd_blocksize,
sparse=True)
except Exception:
with excutils.save_and_reraise_exception():
utils.ignore_exception(self.delete_volume, volume)
LOG.error(_LE('Failed to create cloned volume: %(vol_id)s, '
'from source unity snapshot: %(snap_name)s. '),
{'vol_id': volume.id, 'snap_name': snap.name})
return model_update
def test_byte_to_mib(self):
self.assertEqual(5, utils.byte_to_mib(5 * units.Mi))
def test_byte_to_mib(self):
self.assertEqual(5, utils.byte_to_mib(5 * units.Mi))
