def delete(self, context, group, force=False):
if not group.host:
self.update_quota(context, group, -1, group.project_id)
LOG.debug("No host for consistency group %s. Deleting from "
"the database.", group.id)
group.destroy()
return
if force:
expected = {}
else:
expected = {'status': (c_fields.ConsistencyGroupStatus.AVAILABLE,
c_fields.ConsistencyGroupStatus.ERROR)}
filters = [~db.cg_has_cgsnapshot_filter(),
~db.cg_has_volumes_filter(attached_or_with_snapshots=force),
~db.cg_creating_from_src(cg_id=group.id)]
values = {'status': c_fields.ConsistencyGroupStatus.DELETING}
if not group.conditional_update(values, expected, filters):
if force:
reason = _('Consistency group must not have attached volumes, '
'volumes with snapshots, or dependent cgsnapshots')
else:
reason = _('Consistency group status must be available or '
'error and must not have volumes or dependent '
'cgsnapshots')
msg = (_('Cannot delete consistency group %(id)s. %(reason)s, and '
'it cannot be the source for an ongoing CG or CG '
'Snapshot creation.')
% {'id': group.id, 'reason': reason})
raise exception.InvalidConsistencyGroup(reason=msg)
self.volume_rpcapi.delete_consistencygroup(context, group)
def delete_cgsnapshot(self, context, cgsnapshot, force=False):
values = {'status': 'deleting'}
expected = {'status': ('available', 'error')}
filters = [~db.cg_creating_from_src(cgsnapshot_id=cgsnapshot.id)]
res = cgsnapshot.conditional_update(values, expected, filters)
if not res:
msg = _('CgSnapshot status must be available or error, and no CG '
'can be currently using it as source for its creation.')
raise exception.InvalidCgSnapshot(reason=msg)
self.volume_rpcapi.delete_cgsnapshot(context.elevated(), cgsnapshot)
def delete_cgsnapshot(self, context, cgsnapshot, force=False):
values = {'status': 'deleting'}
expected = {'status': ('available', 'error')}
filters = [~db.cg_creating_from_src(cgsnapshot_id=cgsnapshot.id)]
res = cgsnapshot.conditional_update(values, expected, filters)
if not res:
msg = _('CgSnapshot status must be available or error, and no CG '
'can be currently using it as source for its creation.')
raise exception.InvalidCgSnapshot(reason=msg)
self.volume_rpcapi.delete_cgsnapshot(context.elevated(), cgsnapshot)
def update(self,
context,
group,
name,
description,
add_volumes,
remove_volumes,
allow_empty=False):
"""Update consistency group."""
add_volumes_list = []
remove_volumes_list = []
if add_volumes:
add_volumes = add_volumes.strip(',')
add_volumes_list = add_volumes.split(',')
if remove_volumes:
remove_volumes = remove_volumes.strip(',')
remove_volumes_list = remove_volumes.split(',')
invalid_uuids = []
for uuid in add_volumes_list:
if uuid in remove_volumes_list:
invalid_uuids.append(uuid)
if invalid_uuids:
msg = _("UUIDs %s are in both add and remove volume "
"list.") % invalid_uuids
raise exception.InvalidVolume(reason=msg)
# Validate name.
if name == group.name:
name = None
# Validate description.
if description == group.description:
description = None
self._check_update(group, name, description, add_volumes,
remove_volumes, allow_empty)
fields = {'updated_at': timeutils.utcnow()}
# Update name and description in db now. No need to
# to send them over through an RPC call.
if allow_empty:
if name is not None:
fields['name'] = name
if description is not None:
fields['description'] = description
else:
if name:
fields['name'] = name
if description:
fields['description'] = description
# NOTE(geguileo): We will use the updating status in the CG as a lock
# mechanism to prevent volume add/remove races with other API, while we
# figure out if we really need to add or remove volumes.
if add_volumes or remove_volumes:
fields['status'] = c_fields.ConsistencyGroupStatus.UPDATING
# We cannot modify the members of this CG if the CG is being used
# to create another CG or a CGsnapshot is being created
filters = [
~db.cg_creating_from_src(cg_id=group.id),
~db.cgsnapshot_creating_from_src()
]
else:
filters = []
expected = {'status': c_fields.ConsistencyGroupStatus.AVAILABLE}
if not group.conditional_update(fields, expected, filters):
msg = _("Cannot update consistency group %s, status must be "
"available, and it cannot be the source for an ongoing "
"CG or CG Snapshot creation.") % group.id
raise exception.InvalidConsistencyGroup(reason=msg)
# Now the CG is "locked" for updating
try:
# Validate volumes in add_volumes and remove_volumes.
add_volumes_new = self._validate_add_volumes(
context, group.volumes, add_volumes_list, group)
remove_volumes_new = self._validate_remove_volumes(
group.volumes, remove_volumes_list, group)
self._check_update(group, name, description, add_volumes_new,
remove_volumes_new, allow_empty)
except Exception:
# If we have an error on the volume_lists we must return status to
# available as we were doing before removing API races
with excutils.save_and_reraise_exception():
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()
# Do an RPC call only if the update request includes
# adding/removing volumes. add_volumes_new and remove_volumes_new
# are strings of volume UUIDs separated by commas with no spaces
# in between.
if add_volumes_new or remove_volumes_new:
self.volume_rpcapi.update_consistencygroup(
context,
group,
add_volumes=add_volumes_new,
remove_volumes=remove_volumes_new)
# If there are no new volumes to add or remove and we had changed
# the status to updating, turn it back to available
elif group.status == c_fields.ConsistencyGroupStatus.UPDATING:
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()
def update(self, context, group, name, description,
add_volumes, remove_volumes, allow_empty=False):
"""Update consistency group."""
add_volumes_list = []
remove_volumes_list = []
if add_volumes:
add_volumes = add_volumes.strip(',')
add_volumes_list = add_volumes.split(',')
if remove_volumes:
remove_volumes = remove_volumes.strip(',')
remove_volumes_list = remove_volumes.split(',')
invalid_uuids = []
for uuid in add_volumes_list:
if uuid in remove_volumes_list:
invalid_uuids.append(uuid)
if invalid_uuids:
msg = _("UUIDs %s are in both add and remove volume "
"list.") % invalid_uuids
raise exception.InvalidVolume(reason=msg)
# Validate name.
if name == group.name:
name = None
# Validate description.
if description == group.description:
description = None
self._check_update(group, name, description, add_volumes,
remove_volumes, allow_empty)
fields = {'updated_at': timeutils.utcnow()}
# Update name and description in db now. No need to
# to send them over through an RPC call.
if allow_empty:
if name is not None:
fields['name'] = name
if description is not None:
fields['description'] = description
else:
if name:
fields['name'] = name
if description:
fields['description'] = description
# NOTE(geguileo): We will use the updating status in the CG as a lock
# mechanism to prevent volume add/remove races with other API, while we
# figure out if we really need to add or remove volumes.
if add_volumes or remove_volumes:
fields['status'] = c_fields.ConsistencyGroupStatus.UPDATING
# We cannot modify the members of this CG if the CG is being used
# to create another CG or a CGsnapshot is being created
filters = [~db.cg_creating_from_src(cg_id=group.id),
~db.cgsnapshot_creating_from_src()]
else:
filters = []
expected = {'status': c_fields.ConsistencyGroupStatus.AVAILABLE}
if not group.conditional_update(fields, expected, filters):
msg = _("Cannot update consistency group %s, status must be "
"available, and it cannot be the source for an ongoing "
"CG or CG Snapshot creation.") % group.id
raise exception.InvalidConsistencyGroup(reason=msg)
# Now the CG is "locked" for updating
try:
# Validate volumes in add_volumes and remove_volumes.
add_volumes_new = self._validate_add_volumes(
context, group.volumes, add_volumes_list, group)
remove_volumes_new = self._validate_remove_volumes(
group.volumes, remove_volumes_list, group)
self._check_update(group, name, description, add_volumes_new,
remove_volumes_new, allow_empty)
except Exception:
# If we have an error on the volume_lists we must return status to
# available as we were doing before removing API races
with excutils.save_and_reraise_exception():
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()
# Do an RPC call only if the update request includes
# adding/removing volumes. add_volumes_new and remove_volumes_new
# are strings of volume UUIDs separated by commas with no spaces
# in between.
if add_volumes_new or remove_volumes_new:
self.volume_rpcapi.update_consistencygroup(
context, group,
add_volumes=add_volumes_new,
remove_volumes=remove_volumes_new)
# If there are no new volumes to add or remove and we had changed
# the status to updating, turn it back to available
elif group.status == c_fields.ConsistencyGroupStatus.UPDATING:
group.status = c_fields.ConsistencyGroupStatus.AVAILABLE
group.save()