144 lines
6.3 KiB
Python
144 lines
6.3 KiB
Python
# Copyright 2016 Internap.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from datetime import timedelta
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from oslo_log import log
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from almanach.core.controllers import base_controller
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from almanach.core import exception
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from almanach.core import model
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LOG = log.getLogger(__name__)
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class VolumeController(base_controller.BaseController):
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def __init__(self, config, database_adapter):
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self.database_adapter = database_adapter
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self.volume_existence_threshold = timedelta(0, config.entities.volume_existence_threshold)
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def list_volumes(self, project_id, start, end):
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return self.database_adapter.get_all_entities_by_project(project_id, start, end, model.Volume.TYPE)
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def create_volume(self, volume_id, project_id, start, volume_type, size, volume_name, attached_to=None):
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start = self._validate_and_parse_date(start)
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LOG.info("volume %s created in project %s to size %s on %s", volume_id, project_id, size, start)
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if self._fresher_entity_exists(volume_id, start):
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return
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volume_type_name = self._get_volume_type_name(volume_type)
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entity = model.Volume(volume_id, project_id, start, None, volume_type_name, size, start, volume_name,
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attached_to)
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self.database_adapter.insert_entity(entity)
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def detach_volume(self, volume_id, date, attachments):
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date = self._validate_and_parse_date(date)
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LOG.info("volume %s detached on %s", volume_id, date)
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try:
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self._volume_detach_instance(volume_id, date, attachments)
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except exception.EntityNotFoundException as e:
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LOG.error("Trying to detach a volume with id '%s' not in the database yet.", volume_id)
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raise e
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def attach_volume(self, volume_id, date, attachments):
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date = self._validate_and_parse_date(date)
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LOG.info("Volume %s attached to %s on %s", volume_id, attachments, date)
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try:
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self._volume_attach_instance(volume_id, date, attachments)
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except exception.EntityNotFoundException as e:
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LOG.error("Trying to attach a volume with id '%s' not in the database yet.", volume_id)
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raise e
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def rename_volume(self, volume_id, volume_name):
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try:
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volume = self.database_adapter.get_active_entity(volume_id)
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if volume and volume.name != volume_name:
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LOG.info("volume %s renamed from %s to %s", volume_id, volume.name, volume_name)
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volume.name = volume_name
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self.database_adapter.update_active_entity(volume)
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except exception.EntityNotFoundException:
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LOG.error("Trying to update a volume with id '%s' not in the database yet.", volume_id)
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def resize_volume(self, volume_id, size, update_date):
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update_date = self._validate_and_parse_date(update_date)
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try:
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volume = self.database_adapter.get_active_entity(volume_id)
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LOG.info("volume %s updated in project %s to size %s on %s",
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volume_id, volume.project_id, size, update_date)
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self.database_adapter.close_active_entity(volume_id, update_date)
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volume.size = size
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volume.start = update_date
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volume.end = None
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volume.last_event = update_date
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self.database_adapter.insert_entity(volume)
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except exception.EntityNotFoundException as e:
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LOG.error("Trying to update a volume with id '%s' not in the database yet.", volume_id)
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raise e
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def delete_volume(self, volume_id, delete_date):
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delete_date = self._localize_date(self._validate_and_parse_date(delete_date))
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LOG.info("volume %s deleted on %s", volume_id, delete_date)
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try:
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if self.database_adapter.count_entity_entries(volume_id) > 1:
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volume = self.database_adapter.get_active_entity(volume_id)
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if delete_date - volume.start < self.volume_existence_threshold:
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self.database_adapter.delete_active_entity(volume_id)
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return
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self.database_adapter.close_active_entity(volume_id, delete_date)
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except exception.EntityNotFoundException as e:
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LOG.error("Trying to delete a volume with id '%s' not in the database yet.", volume_id)
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raise e
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def _volume_attach_instance(self, volume_id, date, attachments):
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volume = self.database_adapter.get_active_entity(volume_id)
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date = self._localize_date(date)
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volume.last_event = date
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existing_attachments = volume.attached_to
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volume.attached_to = attachments
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if existing_attachments or self._is_within_threshold(date, volume):
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self.database_adapter.update_active_entity(volume)
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else:
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self._close_volume(volume_id, volume, date)
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def _volume_detach_instance(self, volume_id, date, attachments):
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volume = self.database_adapter.get_active_entity(volume_id)
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date = self._localize_date(date)
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volume.last_event = date
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volume.attached_to = attachments
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if attachments or self._is_within_threshold(date, volume):
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self.database_adapter.update_active_entity(volume)
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else:
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self._close_volume(volume_id, volume, date)
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def _close_volume(self, volume_id, volume, date):
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self.database_adapter.close_active_entity(volume_id, date)
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volume.start = date
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volume.end = None
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self.database_adapter.insert_entity(volume)
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def _is_within_threshold(self, date, volume):
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return date - volume.start < self.volume_existence_threshold
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def _get_volume_type_name(self, volume_type_id):
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if volume_type_id is None:
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return None
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volume_type = self.database_adapter.get_volume_type(volume_type_id)
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return volume_type.volume_type_name
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