465 lines
20 KiB
Python
465 lines
20 KiB
Python
# Copyright (c) 2014 NetApp Inc.
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# All Rights Reserved.
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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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"""NAS share manager managers creating shares and access rights.
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**Related Flags**
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:share_driver: Used by :class:`ShareManager`.
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"""
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from manila.common import constants
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from manila import context
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from manila import exception
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from manila import manager
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from manila import network
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from manila.openstack.common import excutils
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from manila.openstack.common import importutils
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from manila.openstack.common import log as logging
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from manila.openstack.common import timeutils
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from manila import quota
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import manila.share.configuration
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from manila import utils
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from oslo.config import cfg
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LOG = logging.getLogger(__name__)
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share_manager_opts = [
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cfg.StrOpt('share_driver',
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default='manila.share.drivers.generic.GenericShareDriver',
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help='Driver to use for share creation'),
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cfg.BoolOpt('delete_share_server_with_last_share',
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default=False,
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help='With this option is set to True share server will'
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'be deleted on deletion of last share'),
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]
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CONF = cfg.CONF
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CONF.register_opts(share_manager_opts)
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QUOTAS = quota.QUOTAS
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class ShareManager(manager.SchedulerDependentManager):
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"""Manages NAS storages."""
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def __init__(self, share_driver=None, service_name=None, *args, **kwargs):
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"""Load the driver from args, or from flags."""
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self.configuration = manila.share.configuration.Configuration(
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share_manager_opts,
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config_group=service_name)
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super(ShareManager, self).__init__(service_name='share',
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*args, **kwargs)
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if not share_driver:
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share_driver = self.configuration.share_driver
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self.driver = importutils.import_object(
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share_driver, self.db, configuration=self.configuration)
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self.network_api = network.API()
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def init_host(self):
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"""Initialization for a standalone service."""
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ctxt = context.get_admin_context()
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self.driver.do_setup(ctxt)
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self.driver.check_for_setup_error()
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shares = self.db.share_get_all_by_host(ctxt, self.host)
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LOG.debug("Re-exporting %s shares", len(shares))
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for share in shares:
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if share['status'] == 'available':
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share_server = self._get_share_server(ctxt, share)
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self.driver.ensure_share(ctxt, share,
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share_server=share_server)
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rules = self.db.share_access_get_all_for_share(ctxt,
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share['id'])
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for access_ref in rules:
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if access_ref['state'] == access_ref.STATE_ACTIVE:
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try:
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self.driver.allow_access(ctxt, share,
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access_ref,
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share_server=share_server)
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except exception.ShareAccessExists:
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pass
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else:
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LOG.info(_("share %s: skipping export"), share['name'])
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self.publish_service_capabilities(ctxt)
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def _provide_share_server_for_share(self, context, share_network_id,
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share_id):
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"""Gets or creates share_server and updates share with its id.
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Active share_server can be deleted if there are no dependent shares
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on it.
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So we need avoid possibility to delete share_server in time gap
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between reaching active state for share_server and setting up
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share_server_id for share. It is possible, for example, with first
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share creation, which starts share_server creation.
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For this purpose used shared lock between this method and the one
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with deletion of share_server.
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:returns: dict, dict -- first value is share_server, that
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has been choosen for share schedule. Second value is
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share updated with share_server_id.
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"""
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@utils.synchronized("share_manager_%s" % share_network_id)
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def _provide_share_server_for_share():
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exist = False
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try:
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share_server = \
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self.db.share_server_get_by_host_and_share_net_valid(
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context, self.host, share_network_id)
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exist = True
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except exception.ShareServerNotFound:
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share_server = self.db.share_server_create(
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context,
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{
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'host': self.host,
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'share_network_id': share_network_id,
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'status': constants.STATUS_CREATING
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}
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)
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LOG.debug("Using share_server %s for share %s" % (
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share_server['id'], share_id))
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share_ref = self.db.share_update(
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context,
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share_id,
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{'share_server_id': share_server['id']},
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)
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if not exist:
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# Create share server on backend with data from db
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share_server = self._setup_server(context, share_server)
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LOG.info(_("Share server created successfully."))
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else:
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LOG.info(_("Used already existed share server '%(share_server"
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"_id)s'") % {'share_server_id': share_server['id']})
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return share_server, share_ref
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return _provide_share_server_for_share()
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def _get_share_server(self, context, share):
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if share['share_server_id']:
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return self.db.share_server_get(
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context, share['share_server_id'])
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else:
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return None
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def create_share(self, context, share_id, request_spec=None,
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filter_properties=None, snapshot_id=None):
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"""Creates a share."""
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context = context.elevated()
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if filter_properties is None:
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filter_properties = {}
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share_ref = self.db.share_get(context, share_id)
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if snapshot_id is not None:
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snapshot_ref = self.db.share_snapshot_get(context, snapshot_id)
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parent_share_server_id = snapshot_ref['share']['share_server_id']
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else:
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snapshot_ref = None
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parent_share_server_id = None
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share_network_id = share_ref.get('share_network_id', None)
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if parent_share_server_id:
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try:
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share_server = self.db.share_server_get(context,
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parent_share_server_id)
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LOG.debug("Using share_server "
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"%s for share %s" % (share_server['id'], share_id))
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share_ref = self.db.share_update(
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context, share_id, {'share_server_id': share_server['id']})
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except exception.ShareServerNotFound:
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with excutils.save_and_reraise_exception():
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LOG.error(_("Share server %s does not exist.")
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% parent_share_server_id)
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self.db.share_update(context, share_id,
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{'status': 'error'})
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elif share_network_id:
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try:
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share_server, share_ref = self._provide_share_server_for_share(
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context, share_network_id, share_id)
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except Exception:
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with excutils.save_and_reraise_exception():
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LOG.error(_("Failed to get share server"
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" for share creation."))
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self.db.share_update(context, share_id,
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{'status': 'error'})
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else:
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share_server = None
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try:
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if snapshot_ref:
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export_location = self.driver.create_share_from_snapshot(
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context, share_ref, snapshot_ref,
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share_server=share_server)
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else:
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export_location = self.driver.create_share(
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context, share_ref, share_server=share_server)
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self.db.share_update(context, share_id,
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{'export_location': export_location})
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except Exception:
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with excutils.save_and_reraise_exception():
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LOG.error(_("Share %s failed on creation.") % share_id)
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self.db.share_update(context, share_id, {'status': 'error'})
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else:
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LOG.info(_("Share created successfully."))
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self.db.share_update(context, share_id,
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{'status': 'available',
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'launched_at': timeutils.utcnow()})
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def delete_share(self, context, share_id):
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"""Delete a share."""
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context = context.elevated()
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share_ref = self.db.share_get(context, share_id)
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share_server = self._get_share_server(context, share_ref)
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if context.project_id != share_ref['project_id']:
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project_id = share_ref['project_id']
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else:
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project_id = context.project_id
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rules = self.db.share_access_get_all_for_share(context, share_id)
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try:
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for access_ref in rules:
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self._deny_access(context, access_ref, share_ref, share_server)
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self.driver.delete_share(context, share_ref,
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share_server=share_server)
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_update(context, share_id,
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{'status': 'error_deleting'})
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try:
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reservations = QUOTAS.reserve(context,
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project_id=project_id,
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shares=-1,
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gigabytes=-share_ref['size'])
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except Exception:
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reservations = None
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LOG.exception(_("Failed to update usages deleting share"))
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self.db.share_delete(context, share_id)
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LOG.info(_("Share %s: deleted successfully."), share_ref['name'])
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if reservations:
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QUOTAS.commit(context, reservations, project_id=project_id)
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if CONF.delete_share_server_with_last_share:
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share_server = self._get_share_server(context, share_ref)
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if share_server and not share_server.shares:
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LOG.debug("Scheduled deletion of share-server "
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"with id '%s' automatically by "
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"deletion of last share." % share_server['id'])
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self.delete_share_server(context, share_server)
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def create_snapshot(self, context, share_id, snapshot_id):
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"""Create snapshot for share."""
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snapshot_ref = self.db.share_snapshot_get(context, snapshot_id)
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share_server = self._get_share_server(context,
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snapshot_ref['share'])
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try:
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model_update = self.driver.create_snapshot(
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context, snapshot_ref, share_server=share_server)
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if model_update:
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model_dict = model_update.to_dict()
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self.db.share_snapshot_update(context, snapshot_ref['id'],
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model_dict)
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_snapshot_update(context,
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snapshot_ref['id'],
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{'status': 'error'})
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self.db.share_snapshot_update(context,
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snapshot_ref['id'],
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{'status': 'available',
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'progress': '100%'})
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return snapshot_id
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def delete_snapshot(self, context, snapshot_id):
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"""Delete share snapshot."""
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context = context.elevated()
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snapshot_ref = self.db.share_snapshot_get(context, snapshot_id)
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share_server = self._get_share_server(context,
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snapshot_ref['share'])
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if context.project_id != snapshot_ref['project_id']:
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project_id = snapshot_ref['project_id']
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else:
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project_id = context.project_id
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try:
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self.driver.delete_snapshot(context, snapshot_ref,
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share_server=share_server)
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except exception.ShareSnapshotIsBusy:
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self.db.share_snapshot_update(context, snapshot_ref['id'],
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{'status': 'available'})
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_snapshot_update(context, snapshot_ref['id'],
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{'status': 'error_deleting'})
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else:
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self.db.share_snapshot_destroy(context, snapshot_id)
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try:
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reservations = QUOTAS.reserve(context,
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project_id=project_id,
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snapshots=-1,
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gigabytes=-snapshot_ref['size'])
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except Exception:
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reservations = None
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LOG.exception(_("Failed to update usages deleting snapshot"))
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if reservations:
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QUOTAS.commit(context, reservations, project_id=project_id)
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def allow_access(self, context, access_id):
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"""Allow access to some share."""
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try:
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access_ref = self.db.share_access_get(context, access_id)
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share_ref = self.db.share_get(context, access_ref['share_id'])
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share_server = self._get_share_server(context,
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share_ref)
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if access_ref['state'] == access_ref.STATE_NEW:
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self.driver.allow_access(context, share_ref, access_ref,
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share_server=share_server)
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self.db.share_access_update(
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context, access_id, {'state': access_ref.STATE_ACTIVE})
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_access_update(
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context, access_id, {'state': access_ref.STATE_ERROR})
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def deny_access(self, context, access_id):
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"""Deny access to some share."""
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access_ref = self.db.share_access_get(context, access_id)
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share_ref = self.db.share_get(context, access_ref['share_id'])
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share_server = self._get_share_server(context,
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share_ref)
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self._deny_access(context, access_ref, share_ref, share_server)
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def _deny_access(self, context, access_ref, share_ref, share_server):
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access_id = access_ref['id']
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try:
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self.driver.deny_access(context, share_ref, access_ref,
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share_server=share_server)
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_access_update(
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context, access_id, {'state': access_ref.STATE_ERROR})
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self.db.share_access_delete(context, access_id)
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@manager.periodic_task
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def _report_driver_status(self, context):
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LOG.info(_('Updating share status'))
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share_stats = self.driver.get_share_stats(refresh=True)
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if share_stats:
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self.update_service_capabilities(share_stats)
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def publish_service_capabilities(self, context):
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"""Collect driver status and then publish it."""
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self._report_driver_status(context)
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self._publish_service_capabilities(context)
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def _form_server_setup_info(self, context, share_server, share_network):
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# Network info is used by driver for setting up share server
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# and getting server info on share creation.
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network_allocations = self.db.network_allocations_get_for_share_server(
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context, share_server['id'])
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network_info = {
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'server_id': share_server['id'],
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'segmentation_id': share_network['segmentation_id'],
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'cidr': share_network['cidr'],
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'neutron_net_id': share_network['neutron_net_id'],
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'neutron_subnet_id': share_network['neutron_subnet_id'],
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'security_services': share_network['security_services'],
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'network_allocations': network_allocations,
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'backend_details': share_server.get('backend_details'),
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}
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return network_info
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def _setup_server(self, context, share_server, metadata=None):
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share_network = self.db.share_network_get(
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context, share_server['share_network_id'])
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try:
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allocation_number = self.driver.get_network_allocations_number()
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if allocation_number:
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self.network_api.allocate_network(
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context, share_server, share_network,
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count=allocation_number)
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network_info = self._form_server_setup_info(context, share_server,
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share_network)
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server_info = self.driver.setup_server(network_info,
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metadata=metadata)
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if server_info and isinstance(server_info, dict):
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self.db.share_server_backend_details_set(context,
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share_server['id'],
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server_info)
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return self.db.share_server_update(
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context, share_server['id'],
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{'status': constants.STATUS_ACTIVE})
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except Exception:
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with excutils.save_and_reraise_exception():
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self.db.share_server_update(context, share_server['id'],
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{'status': constants.STATUS_ERROR})
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self.network_api.deallocate_network(context, share_network)
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def delete_share_server(self, context, share_server):
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@utils.synchronized(
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"share_manager_%s" % share_server['share_network_id'])
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def _teardown_server():
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# NOTE(vponomaryov): Verify that there are no dependent shares.
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# Without this verification we can get here exception in next case:
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# share-server-delete API was called after share creation scheduled
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# and share_server reached ACTIVE status, but before update
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# of share_server_id field for share. If so, after lock realese
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# this method starts executing when amount of dependent shares
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# has been changed.
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shares = self.db.share_get_all_by_share_server(
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context, share_server['id'])
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if shares:
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raise exception.ShareServerInUse(
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share_server_id=share_server['id'])
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self.db.share_server_update(context, share_server['id'],
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{'status': constants.STATUS_DELETING})
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sec_services = self.db.share_network_get(
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context,
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share_server['share_network_id'])['security_services']
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try:
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LOG.debug("Deleting share server")
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self.driver.teardown_server(share_server['backend_details'],
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security_services=sec_services)
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except Exception:
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with excutils.save_and_reraise_exception():
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LOG.error(_("Share server %s failed on deletion.")
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% share_server['id'])
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self.db.share_server_update(
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context, share_server['id'],
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{'status': constants.STATUS_ERROR})
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else:
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self.db.share_server_delete(context, share_server['id'])
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_teardown_server()
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LOG.info(_("Share server deleted successfully."))
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self.network_api.deallocate_network(context, share_server)
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