135 lines
5.2 KiB
Python
135 lines
5.2 KiB
Python
# Copyright 2014 IBM Corp.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
from oslo_log import log as logging
|
|
from oslo_utils import excutils
|
|
import taskflow.engines
|
|
from taskflow.patterns import linear_flow
|
|
|
|
from cinder import exception
|
|
from cinder import flow_utils
|
|
from cinder.i18n import _
|
|
from cinder.volume.flows.api import create_volume as create_api
|
|
from cinder.volume.flows import common as flow_common
|
|
from cinder.volume.flows.manager import create_volume as create_mgr
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
ACTION = 'volume:manage_existing'
|
|
|
|
|
|
class PrepareForQuotaReservationTask(flow_utils.CinderTask):
|
|
"""Gets the volume size from the driver."""
|
|
|
|
default_provides = set(['size', 'volume_type_id', 'volume_properties',
|
|
'volume_spec'])
|
|
|
|
def __init__(self, db, driver):
|
|
super(PrepareForQuotaReservationTask, self).__init__(addons=[ACTION])
|
|
self.db = db
|
|
self.driver = driver
|
|
|
|
def execute(self, context, volume, manage_existing_ref):
|
|
driver_name = self.driver.__class__.__name__
|
|
if not self.driver.initialized:
|
|
LOG.error("Unable to manage existing volume. "
|
|
"Volume driver %s not initialized.", driver_name)
|
|
flow_common.error_out(volume, _("Volume driver %s not "
|
|
"initialized.") % driver_name,
|
|
status='error_managing')
|
|
raise exception.DriverNotInitialized()
|
|
|
|
size = 0
|
|
try:
|
|
size = self.driver.manage_existing_get_size(volume,
|
|
manage_existing_ref)
|
|
except Exception:
|
|
with excutils.save_and_reraise_exception():
|
|
reason = _("Volume driver %s get exception.") % driver_name
|
|
flow_common.error_out(volume, reason,
|
|
status='error_managing')
|
|
|
|
return {'size': size,
|
|
'volume_type_id': volume.volume_type_id,
|
|
'volume_properties': volume,
|
|
'volume_spec': {'status': volume.status,
|
|
'volume_name': volume.name,
|
|
'volume_id': volume.id}}
|
|
|
|
def revert(self, context, result, flow_failures, volume, **kwargs):
|
|
reason = _('Volume manage failed.')
|
|
flow_common.error_out(volume, reason=reason,
|
|
status='error_managing')
|
|
LOG.error("Volume %s: manage failed.", volume.id)
|
|
|
|
|
|
class ManageExistingTask(flow_utils.CinderTask):
|
|
"""Brings an existing volume under Cinder management."""
|
|
|
|
default_provides = set(['volume'])
|
|
|
|
def __init__(self, db, driver):
|
|
super(ManageExistingTask, self).__init__(addons=[ACTION])
|
|
self.db = db
|
|
self.driver = driver
|
|
|
|
def execute(self, context, volume, manage_existing_ref, size):
|
|
model_update = self.driver.manage_existing(volume,
|
|
manage_existing_ref)
|
|
|
|
if not model_update:
|
|
model_update = {}
|
|
model_update.update({'size': size})
|
|
try:
|
|
volume.update(model_update)
|
|
volume.save()
|
|
except exception.CinderException:
|
|
LOG.exception("Failed updating model of volume %(volume_id)s"
|
|
" with creation provided model %(model)s",
|
|
{'volume_id': volume.id,
|
|
'model': model_update})
|
|
raise
|
|
|
|
return {'volume': volume}
|
|
|
|
|
|
def get_flow(context, db, driver, host, volume, ref):
|
|
"""Constructs and returns the manager entrypoint flow."""
|
|
|
|
flow_name = ACTION.replace(":", "_") + "_manager"
|
|
volume_flow = linear_flow.Flow(flow_name)
|
|
|
|
# This injects the initial starting flow values into the workflow so that
|
|
# the dependency order of the tasks provides/requires can be correctly
|
|
# determined.
|
|
create_what = {
|
|
'context': context,
|
|
'volume': volume,
|
|
'manage_existing_ref': ref,
|
|
'group_snapshot': None,
|
|
'optional_args': {'is_quota_committed': False},
|
|
}
|
|
|
|
volume_flow.add(create_mgr.NotifyVolumeActionTask(db,
|
|
"manage_existing.start"),
|
|
PrepareForQuotaReservationTask(db, driver),
|
|
create_api.QuotaReserveTask(),
|
|
ManageExistingTask(db, driver),
|
|
create_api.QuotaCommitTask(),
|
|
create_mgr.CreateVolumeOnFinishTask(db,
|
|
"manage_existing.end"))
|
|
|
|
# Now load (but do not run) the flow using the provided initial data.
|
|
return taskflow.engines.load(volume_flow, store=create_what)
|