113 lines
4.1 KiB
Python
113 lines
4.1 KiB
Python
# Copyright 2014 IBM Corp.
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#
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# 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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"""
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Handles all requests relating to volume replication.
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"""
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import functools
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from oslo_log import log as logging
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from cinder.db import base
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from cinder import exception
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from cinder.i18n import _
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from cinder import policy
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from cinder import volume as cinder_volume
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from cinder.volume import rpcapi as volume_rpcapi
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from cinder.volume import utils as volume_utils
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LOG = logging.getLogger(__name__)
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PROMOTE_PROCEED_STATUS = ('active', 'active-stopped')
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REENABLE_PROCEED_STATUS = ('inactive', 'active-stopped', 'error')
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def wrap_check_policy(func):
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"""Check policy corresponding to the wrapped methods prior to execution.
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This decorator requires the first 3 args of the wrapped function
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to be (self, context, relationship_id)
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"""
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@functools.wraps(func)
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def wrapped(self, context, target_obj, *args, **kwargs):
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check_policy(context, func.__name__, target_obj)
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return func(self, context, target_obj, *args, **kwargs)
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return wrapped
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def check_policy(context, action, target_obj=None):
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target = {
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'project_id': context.project_id,
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'user_id': context.user_id,
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}
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target.update(target_obj or {})
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_action = 'volume_extension:replication:%s' % action
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policy.enforce(context, _action, target)
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class API(base.Base):
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"""API for interacting with volume replication relationships."""
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def __init__(self, db_driver=None):
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super(API, self).__init__(db_driver)
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self.volume_rpcapi = volume_rpcapi.VolumeAPI()
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self.volume_api = cinder_volume.API()
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@wrap_check_policy
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def promote(self, context, vol):
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if vol['replication_status'] == 'disabled':
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msg = _("Replication is not enabled for volume")
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raise exception.ReplicationError(
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reason=msg,
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volume_id=vol['id'])
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if vol['replication_status'] not in PROMOTE_PROCEED_STATUS:
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msg = _("Replication status for volume must be active or "
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"active-stopped, but current status "
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"is: %s") % vol['replication_status']
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raise exception.ReplicationError(
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reason=msg,
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volume_id=vol['id'])
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if vol['status'] != 'available':
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msg = _("Volume status for volume must be available, but current "
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"status is: %s") % vol['status']
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raise exception.ReplicationError(
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reason=msg,
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volume_id=vol['id'])
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volume_utils.notify_about_replication_usage(context,
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vol,
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'promote')
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self.volume_rpcapi.promote_replica(context, vol)
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@wrap_check_policy
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def reenable(self, context, vol):
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if vol['replication_status'] == 'disabled':
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msg = _("Replication is not enabled")
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raise exception.ReplicationError(
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reason=msg,
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volume_id=vol['id'])
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if vol['replication_status'] not in REENABLE_PROCEED_STATUS:
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msg = _("Replication status for volume must be inactive,"
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" active-stopped, or error, but current status "
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"is: %s") % vol['replication_status']
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raise exception.ReplicationError(
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reason=msg,
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volume_id=vol['id'])
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volume_utils.notify_about_replication_usage(context,
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vol,
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'sync')
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self.volume_rpcapi.reenable_replication(context, vol)
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