841 lines
36 KiB
Python
841 lines
36 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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from oslo_config import cfg
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from oslo_log import log as logging
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import taskflow.engines
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from taskflow.patterns import linear_flow
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from taskflow.types import failure as ft
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from cinder import exception
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from cinder import flow_utils
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from cinder.i18n import _
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from cinder import objects
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from cinder.objects import fields
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from cinder.policies import volumes as policy
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from cinder import quota
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from cinder import quota_utils
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from cinder import utils
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from cinder.volume.flows import common
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from cinder.volume import volume_types
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from cinder.volume import volume_utils
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LOG = logging.getLogger(__name__)
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ACTION = 'volume:create'
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CONF = cfg.CONF
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QUOTAS = quota.QUOTAS
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# Only in these 'sources' status can we attempt to create a volume from a
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# source volume or a source snapshot, other status states we can not create
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# from, 'error' being the common example.
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SNAPSHOT_PROCEED_STATUS = (fields.SnapshotStatus.AVAILABLE,)
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SRC_VOL_PROCEED_STATUS = ('available', 'in-use',)
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REPLICA_PROCEED_STATUS = ('active', 'active-stopped',)
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CG_PROCEED_STATUS = ('available', 'creating',)
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CGSNAPSHOT_PROCEED_STATUS = ('available',)
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GROUP_PROCEED_STATUS = ('available', 'creating',)
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BACKUP_PROCEED_STATUS = (fields.BackupStatus.AVAILABLE,)
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class ExtractVolumeRequestTask(flow_utils.CinderTask):
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"""Processes an api request values into a validated set of values.
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This tasks responsibility is to take in a set of inputs that will form
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a potential volume request and validates those values against a set of
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conditions and/or translates those values into a valid set and then returns
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the validated/translated values for use by other tasks.
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Reversion strategy: N/A
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"""
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# This task will produce the following outputs (said outputs can be
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# saved to durable storage in the future so that the flow can be
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# reconstructed elsewhere and continued).
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default_provides = set(['size', 'snapshot_id',
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'source_volid', 'volume_type', 'volume_type_id',
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'encryption_key_id', 'consistencygroup_id',
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'cgsnapshot_id', 'qos_specs', 'group_id',
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'refresh_az', 'backup_id', 'availability_zones',
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'multiattach'])
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def __init__(self, image_service, availability_zones, **kwargs):
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super(ExtractVolumeRequestTask, self).__init__(addons=[ACTION],
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**kwargs)
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self.image_service = image_service
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self.availability_zones = availability_zones
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@staticmethod
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def _extract_resource(resource, allowed_vals, exc, resource_name,
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props=('status',)):
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"""Extracts the resource id from the provided resource.
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This method validates the input resource dict and checks that the
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properties which names are passed in `props` argument match
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corresponding lists in `allowed` argument. In case of mismatch
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exception of type exc is raised.
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:param resource: Resource dict.
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:param allowed_vals: Tuple of allowed values lists.
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:param exc: Exception type to raise.
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:param resource_name: Name of resource - used to construct log message.
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:param props: Tuple of resource properties names to validate.
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:return: Id of a resource.
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"""
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resource_id = None
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if resource:
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for prop, allowed_states in zip(props, allowed_vals):
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if resource[prop] not in allowed_states:
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msg = _("Originating %(res)s %(prop)s must be one of "
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"'%(vals)s' values")
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msg = msg % {'res': resource_name,
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'prop': prop,
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'vals': ', '.join(allowed_states)}
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# TODO(harlowja): what happens if the status changes after
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# this initial resource status check occurs??? Seems like
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# someone could delete the resource after this check passes
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# but before the volume is officially created?
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raise exc(reason=msg)
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resource_id = resource['id']
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return resource_id
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def _extract_consistencygroup(self, consistencygroup):
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return self._extract_resource(consistencygroup, (CG_PROCEED_STATUS,),
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exception.InvalidConsistencyGroup,
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'consistencygroup')
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def _extract_group(self, group):
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return self._extract_resource(group, (GROUP_PROCEED_STATUS,),
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exception.InvalidGroup,
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'group')
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def _extract_cgsnapshot(self, cgsnapshot):
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return self._extract_resource(cgsnapshot, (CGSNAPSHOT_PROCEED_STATUS,),
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exception.InvalidCgSnapshot,
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'CGSNAPSHOT')
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def _extract_snapshot(self, snapshot):
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return self._extract_resource(snapshot, (SNAPSHOT_PROCEED_STATUS,),
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exception.InvalidSnapshot, 'snapshot')
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def _extract_source_volume(self, source_volume):
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return self._extract_resource(source_volume, (SRC_VOL_PROCEED_STATUS,),
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exception.InvalidVolume, 'source volume')
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def _extract_backup(self, backup):
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return self._extract_resource(backup, (BACKUP_PROCEED_STATUS,),
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exception.InvalidBackup,
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'backup')
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@staticmethod
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def _extract_size(size, source_volume, snapshot, backup):
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"""Extracts and validates the volume size.
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This function will validate or when not provided fill in the provided
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size variable from the source_volume or snapshot and then does
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validation on the size that is found and returns said validated size.
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"""
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def validate_snap_size(size):
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if snapshot and size < snapshot.volume_size:
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msg = _("Volume size '%(size)s'GB cannot be smaller than"
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" the snapshot size %(snap_size)sGB. "
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"They must be >= original snapshot size.")
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msg = msg % {'size': size,
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'snap_size': snapshot.volume_size}
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raise exception.InvalidInput(reason=msg)
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def validate_source_size(size):
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if source_volume and size < source_volume['size']:
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msg = _("Volume size '%(size)s'GB cannot be smaller than "
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"original volume size %(source_size)sGB. "
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"They must be >= original volume size.")
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msg = msg % {'size': size,
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'source_size': source_volume['size']}
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raise exception.InvalidInput(reason=msg)
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def validate_backup_size(size):
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if backup and size < backup['size']:
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msg = _("Volume size %(size)sGB cannot be smaller than "
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"the backup size %(backup_size)sGB. "
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"It must be >= backup size.")
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msg = msg % {'size': size,
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'backup_size': backup['size']}
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raise exception.InvalidInput(reason=msg)
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def validate_int(size):
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if not isinstance(size, int) or size <= 0:
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msg = _("Volume size '%(size)s' must be an integer and"
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" greater than 0") % {'size': size}
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raise exception.InvalidInput(reason=msg)
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# Figure out which validation functions we should be applying
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# on the size value that we extract.
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validator_functors = [validate_int]
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if source_volume:
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validator_functors.append(validate_source_size)
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elif snapshot:
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validator_functors.append(validate_snap_size)
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elif backup:
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validator_functors.append(validate_backup_size)
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# If the size is not provided then try to provide it.
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if not size and source_volume:
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size = source_volume['size']
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elif not size and snapshot:
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size = snapshot.volume_size
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elif not size and backup:
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size = backup['size']
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size = utils.as_int(size)
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LOG.debug("Validating volume size '%(size)s' using %(functors)s",
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{'size': size,
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'functors': ", ".join([common.make_pretty_name(func)
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for func in validator_functors])})
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for func in validator_functors:
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func(size)
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return size
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def _get_image_metadata(self, context, image_id, size):
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"""Checks image existence and validates the image metadata.
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Returns: image metadata or None
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"""
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# Check image existence
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if image_id is None:
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return None
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# NOTE(harlowja): this should raise an error if the image does not
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# exist, this is expected as it signals that the image_id is missing.
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image_meta = self.image_service.show(context, image_id)
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volume_utils.check_image_metadata(image_meta, size)
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return image_meta
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def _extract_availability_zones(self, availability_zone, snapshot,
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source_volume, group, volume_type=None):
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"""Extracts and returns a validated availability zone list.
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This function will extract the availability zone (if not provided) from
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the snapshot or source_volume and then performs a set of validation
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checks on the provided or extracted availability zone and then returns
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the validated availability zone.
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"""
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refresh_az = False
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type_azs = volume_utils.extract_availability_zones_from_volume_type(
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volume_type)
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type_az_configured = type_azs is not None
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if type_az_configured:
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safe_azs = list(
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set(type_azs).intersection(self.availability_zones))
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if not safe_azs:
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raise exception.InvalidTypeAvailabilityZones(az=type_azs)
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else:
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safe_azs = self.availability_zones
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# If the volume will be created in a group, it should be placed in
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# in same availability zone as the group.
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if group:
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try:
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availability_zone = group['availability_zone']
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except (TypeError, KeyError):
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pass
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# Try to extract the availability zone from the corresponding snapshot
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# or source volume if either is valid so that we can be in the same
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# availability zone as the source.
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if availability_zone is None:
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if snapshot:
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try:
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availability_zone = snapshot['volume']['availability_zone']
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except (TypeError, KeyError):
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pass
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if source_volume and availability_zone is None:
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try:
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availability_zone = source_volume['availability_zone']
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except (TypeError, KeyError):
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pass
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if availability_zone is None and not type_az_configured:
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if CONF.default_availability_zone:
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availability_zone = CONF.default_availability_zone
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else:
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# For backwards compatibility use the storage_availability_zone
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availability_zone = CONF.storage_availability_zone
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if availability_zone and availability_zone not in safe_azs:
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refresh_az = True
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if CONF.allow_availability_zone_fallback:
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original_az = availability_zone
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availability_zone = (
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CONF.default_availability_zone or
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CONF.storage_availability_zone)
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LOG.warning("Availability zone '%(s_az)s' "
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"not found, falling back to "
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"'%(s_fallback_az)s'.",
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{'s_az': original_az,
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's_fallback_az': availability_zone})
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else:
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raise exception.InvalidAvailabilityZone(az=availability_zone)
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# If the configuration only allows cloning to the same availability
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# zone then we need to enforce that.
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if availability_zone and CONF.cloned_volume_same_az:
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snap_az = None
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try:
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snap_az = snapshot['volume']['availability_zone']
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except (TypeError, KeyError):
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pass
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if snap_az and snap_az != availability_zone:
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msg = _("Volume must be in the same "
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"availability zone as the snapshot")
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raise exception.InvalidInput(reason=msg)
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source_vol_az = None
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try:
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source_vol_az = source_volume['availability_zone']
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except (TypeError, KeyError):
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pass
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if source_vol_az and source_vol_az != availability_zone:
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msg = _("Volume must be in the same "
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"availability zone as the source volume")
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raise exception.InvalidInput(reason=msg)
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if availability_zone:
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return [availability_zone], refresh_az
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else:
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return safe_azs, refresh_az
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def _get_encryption_key_id(self, key_manager, context, volume_type_id,
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snapshot, source_volume,
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image_metadata):
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encryption_key_id = None
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if volume_types.is_encrypted(context, volume_type_id):
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if snapshot is not None: # creating from snapshot
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encryption_key_id = snapshot['encryption_key_id']
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elif source_volume is not None: # cloning volume
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encryption_key_id = source_volume['encryption_key_id']
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elif image_metadata is not None:
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# creating from image
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encryption_key_id = image_metadata.get(
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'cinder_encryption_key_id')
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# NOTE(joel-coffman): References to the encryption key should *not*
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# be copied because the key is deleted when the volume is deleted.
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# Clone the existing key and associate a separate -- but
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# identical -- key with each volume.
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if encryption_key_id is not None:
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encryption_key_id = volume_utils.clone_encryption_key(
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context,
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key_manager,
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encryption_key_id)
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else:
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encryption_key_id = volume_utils.create_encryption_key(
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context,
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key_manager,
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volume_type_id)
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return encryption_key_id
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@staticmethod
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def _get_volume_type(context, volume_type,
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source_volume, snapshot, image_volume_type_id):
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"""Returns a volume_type object or raises. Never returns None."""
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if volume_type:
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return volume_type
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identifier = None
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if source_volume:
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identifier = {'source': 'volume',
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'id': source_volume['volume_type_id']}
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elif snapshot:
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identifier = {'source': 'snapshot',
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'id': snapshot['volume_type_id']}
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elif image_volume_type_id:
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identifier = {'source': 'image',
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'id': image_volume_type_id}
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if identifier:
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try:
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return objects.VolumeType.get_by_name_or_id(
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context, identifier['id'])
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except (exception.VolumeTypeNotFound,
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exception.VolumeTypeNotFoundByName,
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exception.InvalidVolumeType):
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LOG.exception("Failed to find volume type from "
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"source %(source)s, identifier %(id)s",
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identifier)
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raise
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# otherwise, use the default volume type
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return volume_types.get_default_volume_type(context)
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def execute(self, context, size, snapshot, image_id, source_volume,
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availability_zone, volume_type, metadata, key_manager,
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consistencygroup, cgsnapshot, group, group_snapshot, backup,
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multiattach=False):
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utils.check_exclusive_options(snapshot=snapshot,
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imageRef=image_id,
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source_volume=source_volume,
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backup=backup)
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context.authorize(policy.CREATE_POLICY)
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# TODO(harlowja): what guarantee is there that the snapshot or source
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# volume will remain available after we do this initial verification??
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snapshot_id = self._extract_snapshot(snapshot)
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source_volid = self._extract_source_volume(source_volume)
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backup_id = self._extract_backup(backup)
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size = self._extract_size(size, source_volume, snapshot, backup)
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consistencygroup_id = self._extract_consistencygroup(consistencygroup)
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cgsnapshot_id = self._extract_cgsnapshot(cgsnapshot)
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group_id = self._extract_group(group)
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image_meta = self._get_image_metadata(context,
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image_id,
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size)
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image_properties = image_meta.get(
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'properties', {}) if image_meta else {}
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image_volume_type = image_properties.get(
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'cinder_img_volume_type', None) if image_properties else None
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volume_type = self._get_volume_type(
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context, volume_type, source_volume, snapshot, image_volume_type)
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volume_type_id = volume_type.get('id') if volume_type else None
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availability_zones, refresh_az = self._extract_availability_zones(
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availability_zone, snapshot, source_volume, group,
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volume_type=volume_type)
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encryption_key_id = self._get_encryption_key_id(
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key_manager,
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context,
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volume_type_id,
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snapshot,
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source_volume,
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image_meta) # new key id that's been cloned already
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if volume_type_id:
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volume_type = objects.VolumeType.get_by_name_or_id(
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context, volume_type_id)
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extra_specs = volume_type.get('extra_specs', {})
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# NOTE(tommylikehu): Although the parameter `multiattach` from
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# create volume API is deprecated now, we still need to consider
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# it when multiattach is not enabled in volume type.
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multiattach = (extra_specs.get(
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'multiattach', '') == '<is> True' or multiattach)
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if multiattach and encryption_key_id:
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msg = _('Multiattach cannot be used with encrypted volumes.')
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raise exception.InvalidVolume(reason=msg)
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if multiattach:
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context.authorize(policy.MULTIATTACH_POLICY)
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specs = {}
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if volume_type_id:
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qos_specs = volume_types.get_volume_type_qos_specs(volume_type_id)
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if qos_specs['qos_specs']:
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specs = qos_specs['qos_specs'].get('specs', {})
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# Determine default replication status
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extra_specs = volume_types.get_volume_type_extra_specs(
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volume_type_id)
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if not specs:
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# to make sure we don't pass empty dict
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specs = None
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extra_specs = None
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if volume_utils.is_replicated_spec(extra_specs):
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replication_status = fields.ReplicationStatus.ENABLED
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else:
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replication_status = fields.ReplicationStatus.DISABLED
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return {
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'size': size,
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'snapshot_id': snapshot_id,
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'source_volid': source_volid,
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'volume_type': volume_type,
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'volume_type_id': volume_type_id,
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'encryption_key_id': encryption_key_id,
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'qos_specs': specs,
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'consistencygroup_id': consistencygroup_id,
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'cgsnapshot_id': cgsnapshot_id,
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'group_id': group_id,
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'replication_status': replication_status,
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'refresh_az': refresh_az,
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'backup_id': backup_id,
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'multiattach': multiattach,
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'availability_zones': availability_zones
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}
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class EntryCreateTask(flow_utils.CinderTask):
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"""Creates an entry for the given volume creation in the database.
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Reversion strategy: remove the volume_id created from the database.
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"""
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default_provides = set(['volume_properties', 'volume_id', 'volume'])
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def __init__(self):
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requires = ['description', 'metadata',
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'name', 'reservations', 'size', 'snapshot_id',
|
|
'source_volid', 'volume_type_id', 'encryption_key_id',
|
|
'consistencygroup_id', 'cgsnapshot_id', 'multiattach',
|
|
'qos_specs', 'group_id', 'availability_zones']
|
|
super(EntryCreateTask, self).__init__(addons=[ACTION],
|
|
requires=requires)
|
|
|
|
def execute(self, context, optional_args, **kwargs):
|
|
"""Creates a database entry for the given inputs and returns details.
|
|
|
|
Accesses the database and creates a new entry for the to be created
|
|
volume using the given volume properties which are extracted from the
|
|
input kwargs (and associated requirements this task needs). These
|
|
requirements should be previously satisfied and validated by a
|
|
pre-cursor task.
|
|
"""
|
|
|
|
src_volid = kwargs.get('source_volid')
|
|
src_vol = None
|
|
if src_volid is not None:
|
|
src_vol = objects.Volume.get_by_id(context, src_volid)
|
|
bootable = False
|
|
if src_vol is not None:
|
|
bootable = src_vol.bootable
|
|
elif kwargs.get('snapshot_id'):
|
|
snapshot = objects.Snapshot.get_by_id(context,
|
|
kwargs.get('snapshot_id'))
|
|
volume_id = snapshot.volume_id
|
|
snp_vol = objects.Volume.get_by_id(context, volume_id)
|
|
if snp_vol is not None:
|
|
bootable = snp_vol.bootable
|
|
availability_zones = kwargs.pop('availability_zones')
|
|
volume_properties = {
|
|
'size': kwargs.pop('size'),
|
|
'user_id': context.user_id,
|
|
'project_id': context.project_id,
|
|
'status': 'creating',
|
|
'attach_status': fields.VolumeAttachStatus.DETACHED,
|
|
'encryption_key_id': kwargs.pop('encryption_key_id'),
|
|
# Rename these to the internal name.
|
|
'display_description': kwargs.pop('description'),
|
|
'display_name': kwargs.pop('name'),
|
|
'multiattach': kwargs.pop('multiattach'),
|
|
'bootable': bootable,
|
|
}
|
|
if len(availability_zones) == 1:
|
|
volume_properties['availability_zone'] = availability_zones[0]
|
|
|
|
# Merge in the other required arguments which should provide the rest
|
|
# of the volume property fields (if applicable).
|
|
volume_properties.update(kwargs)
|
|
volume = objects.Volume(context=context, **volume_properties)
|
|
volume.create()
|
|
|
|
# FIXME(dulek): We're passing this volume_properties dict through RPC
|
|
# in request_spec. This shouldn't be needed, most data is replicated
|
|
# in both volume and other places. We should make Newton read data
|
|
# from just one correct place and leave just compatibility code.
|
|
#
|
|
# Right now - let's move it to versioned objects to be able to make
|
|
# non-backward compatible changes.
|
|
|
|
volume_properties = objects.VolumeProperties(**volume_properties)
|
|
|
|
return {
|
|
'volume_id': volume['id'],
|
|
'volume_properties': volume_properties,
|
|
# NOTE(harlowja): it appears like further usage of this volume
|
|
# result actually depend on it being a sqlalchemy object and not
|
|
# just a plain dictionary so that's why we are storing this here.
|
|
#
|
|
# In the future where this task results can be serialized and
|
|
# restored automatically for continued running we will need to
|
|
# resolve the serialization & recreation of this object since raw
|
|
# sqlalchemy objects can't be serialized.
|
|
'volume': volume,
|
|
}
|
|
|
|
def revert(self, context, result, optional_args, **kwargs):
|
|
if isinstance(result, ft.Failure):
|
|
# We never produced a result and therefore can't destroy anything.
|
|
return
|
|
|
|
if optional_args['is_quota_committed']:
|
|
# If quota got committed we shouldn't rollback as the volume has
|
|
# already been created and the quota has already been absorbed.
|
|
return
|
|
|
|
volume = result['volume']
|
|
try:
|
|
volume.destroy()
|
|
except exception.CinderException:
|
|
# We are already reverting, therefore we should silence this
|
|
# exception since a second exception being active will be bad.
|
|
#
|
|
# NOTE(harlowja): Being unable to destroy a volume is pretty
|
|
# bad though!!
|
|
LOG.exception("Failed destroying volume entry %s", volume.id)
|
|
|
|
|
|
class QuotaReserveTask(flow_utils.CinderTask):
|
|
"""Reserves a single volume with the given size & the given volume type.
|
|
|
|
Reversion strategy: rollback the quota reservation.
|
|
|
|
Warning Warning: if the process that is running this reserve and commit
|
|
process fails (or is killed before the quota is rolled back or committed
|
|
it does appear like the quota will never be rolled back). This makes
|
|
software upgrades hard (inflight operations will need to be stopped or
|
|
allowed to complete before the upgrade can occur). *In the future* when
|
|
taskflow has persistence built-in this should be easier to correct via
|
|
an automated or manual process.
|
|
"""
|
|
|
|
default_provides = set(['reservations'])
|
|
|
|
def __init__(self):
|
|
super(QuotaReserveTask, self).__init__(addons=[ACTION])
|
|
|
|
def execute(self, context, size, volume_type_id, group_snapshot,
|
|
optional_args):
|
|
try:
|
|
values = {'per_volume_gigabytes': size}
|
|
QUOTAS.limit_check(context, project_id=context.project_id,
|
|
**values)
|
|
except exception.OverQuota as e:
|
|
quotas = e.kwargs['quotas']
|
|
raise exception.VolumeSizeExceedsLimit(
|
|
size=size, limit=quotas['per_volume_gigabytes'])
|
|
|
|
try:
|
|
if group_snapshot:
|
|
reserve_opts = {'volumes': 1}
|
|
else:
|
|
reserve_opts = {'volumes': 1, 'gigabytes': size}
|
|
if ('update_size' in optional_args
|
|
and optional_args['update_size']):
|
|
reserve_opts.pop('volumes', None)
|
|
QUOTAS.add_volume_type_opts(context, reserve_opts, volume_type_id)
|
|
reservations = QUOTAS.reserve(context, **reserve_opts)
|
|
return {
|
|
'reservations': reservations,
|
|
}
|
|
except exception.OverQuota as e:
|
|
quota_utils.process_reserve_over_quota(context, e,
|
|
resource='volumes',
|
|
size=size)
|
|
|
|
def revert(self, context, result, optional_args, **kwargs):
|
|
# We never produced a result and therefore can't destroy anything.
|
|
if isinstance(result, ft.Failure):
|
|
return
|
|
|
|
if optional_args['is_quota_committed']:
|
|
# The reservations have already been committed and can not be
|
|
# rolled back at this point.
|
|
return
|
|
# We actually produced an output that we can revert so lets attempt
|
|
# to use said output to rollback the reservation.
|
|
reservations = result['reservations']
|
|
try:
|
|
QUOTAS.rollback(context, reservations)
|
|
except exception.CinderException:
|
|
# We are already reverting, therefore we should silence this
|
|
# exception since a second exception being active will be bad.
|
|
LOG.exception("Failed rolling back quota for"
|
|
" %s reservations", reservations)
|
|
|
|
|
|
class QuotaCommitTask(flow_utils.CinderTask):
|
|
"""Commits the reservation.
|
|
|
|
Reversion strategy: N/A (the rollback will be handled by the task that did
|
|
the initial reservation (see: QuotaReserveTask).
|
|
|
|
Warning Warning: if the process that is running this reserve and commit
|
|
process fails (or is killed before the quota is rolled back or committed
|
|
it does appear like the quota will never be rolled back). This makes
|
|
software upgrades hard (inflight operations will need to be stopped or
|
|
allowed to complete before the upgrade can occur). *In the future* when
|
|
taskflow has persistence built-in this should be easier to correct via
|
|
an automated or manual process.
|
|
"""
|
|
|
|
def __init__(self):
|
|
super(QuotaCommitTask, self).__init__(addons=[ACTION])
|
|
|
|
def execute(self, context, reservations, volume_properties,
|
|
optional_args):
|
|
QUOTAS.commit(context, reservations)
|
|
# updating is_quota_committed attribute of optional_args dictionary
|
|
optional_args['is_quota_committed'] = True
|
|
return {'volume_properties': volume_properties}
|
|
|
|
def revert(self, context, result, **kwargs):
|
|
# We never produced a result and therefore can't destroy anything.
|
|
if isinstance(result, ft.Failure):
|
|
return
|
|
|
|
volume = result['volume_properties']
|
|
try:
|
|
reserve_opts = {'volumes': -1, 'gigabytes': -volume['size']}
|
|
QUOTAS.add_volume_type_opts(context,
|
|
reserve_opts,
|
|
volume['volume_type_id'])
|
|
reservations = QUOTAS.reserve(context,
|
|
project_id=context.project_id,
|
|
**reserve_opts)
|
|
if reservations:
|
|
QUOTAS.commit(context, reservations,
|
|
project_id=context.project_id)
|
|
except Exception:
|
|
LOG.exception("Failed to update quota for deleting "
|
|
"volume: %s", volume['id'])
|
|
|
|
|
|
class VolumeCastTask(flow_utils.CinderTask):
|
|
"""Performs a volume create cast to the scheduler or to the volume manager.
|
|
|
|
This will signal a transition of the api workflow to another child and/or
|
|
related workflow on another component.
|
|
|
|
Reversion strategy: rollback source volume status and error out newly
|
|
created volume.
|
|
"""
|
|
|
|
def __init__(self, scheduler_rpcapi, volume_rpcapi, db):
|
|
requires = ['image_id', 'scheduler_hints', 'snapshot_id',
|
|
'source_volid', 'volume_id', 'volume', 'volume_type',
|
|
'volume_properties', 'consistencygroup_id',
|
|
'cgsnapshot_id', 'group_id', 'backup_id',
|
|
'availability_zones']
|
|
super(VolumeCastTask, self).__init__(addons=[ACTION],
|
|
requires=requires)
|
|
self.volume_rpcapi = volume_rpcapi
|
|
self.scheduler_rpcapi = scheduler_rpcapi
|
|
self.db = db
|
|
|
|
def _cast_create_volume(self, context, request_spec, filter_properties):
|
|
source_volid = request_spec['source_volid']
|
|
volume = request_spec['volume']
|
|
snapshot_id = request_spec['snapshot_id']
|
|
image_id = request_spec['image_id']
|
|
cgroup_id = request_spec['consistencygroup_id']
|
|
group_id = request_spec['group_id']
|
|
backup_id = request_spec['backup_id']
|
|
if cgroup_id:
|
|
# If cgroup_id existed, we should cast volume to the scheduler
|
|
# to choose a proper pool whose backend is same as CG's backend.
|
|
cgroup = objects.ConsistencyGroup.get_by_id(context, cgroup_id)
|
|
request_spec['resource_backend'] = volume_utils.extract_host(
|
|
cgroup.resource_backend)
|
|
elif group_id:
|
|
# If group_id exists, we should cast volume to the scheduler
|
|
# to choose a proper pool whose backend is same as group's backend.
|
|
group = objects.Group.get_by_id(context, group_id)
|
|
request_spec['resource_backend'] = volume_utils.extract_host(
|
|
group.resource_backend)
|
|
elif snapshot_id and CONF.snapshot_same_host:
|
|
# NOTE(Rongze Zhu): A simple solution for bug 1008866.
|
|
#
|
|
# If snapshot_id is set and CONF.snapshot_same_host is True, make
|
|
# the call create volume directly to the volume host where the
|
|
# snapshot resides instead of passing it through the scheduler, so
|
|
# snapshot can be copied to the new volume.
|
|
# NOTE(tommylikehu): In order to check the backend's capacity
|
|
# before creating volume, we schedule this request to scheduler
|
|
# service with the desired backend information.
|
|
snapshot = objects.Snapshot.get_by_id(context, snapshot_id)
|
|
request_spec['resource_backend'] = snapshot.volume.resource_backend
|
|
elif source_volid:
|
|
source_volume_ref = objects.Volume.get_by_id(context, source_volid)
|
|
request_spec['resource_backend'] = (
|
|
source_volume_ref.resource_backend)
|
|
|
|
self.scheduler_rpcapi.create_volume(
|
|
context,
|
|
volume,
|
|
snapshot_id=snapshot_id,
|
|
image_id=image_id,
|
|
request_spec=request_spec,
|
|
filter_properties=filter_properties,
|
|
backup_id=backup_id)
|
|
|
|
def execute(self, context, **kwargs):
|
|
scheduler_hints = kwargs.pop('scheduler_hints', None)
|
|
db_vt = kwargs.pop('volume_type')
|
|
kwargs['volume_type'] = None
|
|
if db_vt:
|
|
kwargs['volume_type'] = objects.VolumeType()
|
|
objects.VolumeType()._from_db_object(context,
|
|
kwargs['volume_type'], db_vt)
|
|
request_spec = objects.RequestSpec(**kwargs)
|
|
filter_properties = {}
|
|
if scheduler_hints:
|
|
filter_properties['scheduler_hints'] = scheduler_hints
|
|
self._cast_create_volume(context, request_spec, filter_properties)
|
|
|
|
def revert(self, context, result, flow_failures, volume, **kwargs):
|
|
if isinstance(result, ft.Failure):
|
|
return
|
|
|
|
# Restore the source volume status and set the volume to error status.
|
|
common.restore_source_status(context, self.db, kwargs)
|
|
common.error_out(volume)
|
|
LOG.error("Volume %s: create failed", volume.id)
|
|
exc_info = False
|
|
if all(flow_failures[-1].exc_info):
|
|
exc_info = flow_failures[-1].exc_info
|
|
LOG.error('Unexpected build error:', exc_info=exc_info) # noqa
|
|
|
|
|
|
def get_flow(db_api, image_service_api, availability_zones, create_what,
|
|
scheduler_rpcapi=None, volume_rpcapi=None):
|
|
"""Constructs and returns the api entrypoint flow.
|
|
|
|
This flow will do the following:
|
|
|
|
1. Inject keys & values for dependent tasks.
|
|
2. Extracts and validates the input keys & values.
|
|
3. Reserves the quota (reverts quota on any failures).
|
|
4. Creates the database entry.
|
|
5. Commits the quota.
|
|
6. Casts to volume manager or scheduler for further processing.
|
|
"""
|
|
|
|
flow_name = ACTION.replace(":", "_") + "_api"
|
|
api_flow = linear_flow.Flow(flow_name)
|
|
|
|
api_flow.add(ExtractVolumeRequestTask(
|
|
image_service_api,
|
|
availability_zones,
|
|
rebind={'size': 'raw_size',
|
|
'availability_zone': 'raw_availability_zone',
|
|
'volume_type': 'raw_volume_type',
|
|
'multiattach': 'raw_multiattach'}))
|
|
api_flow.add(QuotaReserveTask(),
|
|
EntryCreateTask(),
|
|
QuotaCommitTask())
|
|
|
|
if scheduler_rpcapi and volume_rpcapi:
|
|
# This will cast it out to either the scheduler or volume manager via
|
|
# the rpc apis provided.
|
|
api_flow.add(VolumeCastTask(scheduler_rpcapi, volume_rpcapi, db_api))
|
|
|
|
# Now load (but do not run) the flow using the provided initial data.
|
|
return taskflow.engines.load(api_flow, store=create_what)
|