266 lines
11 KiB
Python
266 lines
11 KiB
Python
# Copyright (c) 2010 OpenStack, LLC.
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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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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"""
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Scheduler Service
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"""
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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import excutils
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from oslo_utils import importutils
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import six
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from manila.common import constants
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from manila import context
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from manila import db
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from manila import exception
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from manila.i18n import _LE, _LW
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from manila import manager
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from manila import rpc
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from manila.share import rpcapi as share_rpcapi
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LOG = log.getLogger(__name__)
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scheduler_driver_opt = cfg.StrOpt('scheduler_driver',
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default='manila.scheduler.drivers.'
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'filter.FilterScheduler',
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help='Default scheduler driver to use.')
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CONF = cfg.CONF
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CONF.register_opt(scheduler_driver_opt)
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# Drivers that need to change module paths or class names can add their
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# old/new path here to maintain backward compatibility.
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MAPPING = {
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'manila.scheduler.chance.ChanceScheduler':
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'manila.scheduler.drivers.chance.ChanceScheduler',
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'manila.scheduler.filter_scheduler.FilterScheduler':
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'manila.scheduler.drivers.filter.FilterScheduler',
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'manila.scheduler.simple.SimpleScheduler':
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'manila.scheduler.drivers.simple.SimpleScheduler',
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}
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class SchedulerManager(manager.Manager):
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"""Chooses a host to create shares."""
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RPC_API_VERSION = '1.6'
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def __init__(self, scheduler_driver=None, service_name=None,
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*args, **kwargs):
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if not scheduler_driver:
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scheduler_driver = CONF.scheduler_driver
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if scheduler_driver in MAPPING:
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msg_args = {
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'old': scheduler_driver,
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'new': MAPPING[scheduler_driver],
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}
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LOG.warning(_LW("Scheduler driver path %(old)s is deprecated, "
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"update your configuration to the new path "
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"%(new)s"), msg_args)
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scheduler_driver = MAPPING[scheduler_driver]
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self.driver = importutils.import_object(scheduler_driver)
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super(SchedulerManager, self).__init__(*args, **kwargs)
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def init_host(self):
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ctxt = context.get_admin_context()
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self.request_service_capabilities(ctxt)
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def get_host_list(self, context):
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"""Get a list of hosts from the HostManager."""
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return self.driver.get_host_list()
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def get_service_capabilities(self, context):
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"""Get the normalized set of capabilities for this zone."""
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return self.driver.get_service_capabilities()
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def update_service_capabilities(self, context, service_name=None,
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host=None, capabilities=None, **kwargs):
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"""Process a capability update from a service node."""
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if capabilities is None:
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capabilities = {}
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self.driver.update_service_capabilities(service_name,
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host,
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capabilities)
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def create_share_instance(self, context, request_spec=None,
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filter_properties=None):
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try:
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self.driver.schedule_create_share(context, request_spec,
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filter_properties)
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except exception.NoValidHost as ex:
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self._set_share_state_and_notify('create_share',
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{'status':
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constants.STATUS_ERROR},
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context, ex, request_spec)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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self._set_share_state_and_notify('create_share',
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{'status':
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constants.STATUS_ERROR},
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context, ex, request_spec)
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def get_pools(self, context, filters=None):
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"""Get active pools from the scheduler's cache."""
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return self.driver.get_pools(context, filters)
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def manage_share(self, context, share_id, driver_options, request_spec,
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filter_properties=None):
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"""Ensure that the host exists and can accept the share."""
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def _manage_share_set_error(self, context, ex, request_spec):
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self._set_share_state_and_notify(
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'manage_share',
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{'status': constants.STATUS_MANAGE_ERROR},
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context, ex, request_spec)
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share_ref = db.share_get(context, share_id)
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try:
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self.driver.host_passes_filters(
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context, share_ref['host'], request_spec, filter_properties)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_manage_share_set_error(self, context, ex, request_spec)
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else:
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share_rpcapi.ShareAPI().manage_share(context, share_ref,
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driver_options)
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def migrate_share_to_host(self, context, share_id, host,
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force_host_copy, notify, request_spec,
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filter_properties=None):
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"""Ensure that the host exists and can accept the share."""
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def _migrate_share_set_error(self, context, ex, request_spec):
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self._set_share_state_and_notify(
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'migrate_share_to_host',
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{'task_state': constants.TASK_STATE_MIGRATION_ERROR},
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context, ex, request_spec)
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try:
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tgt_host = self.driver.host_passes_filters(context, host,
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request_spec,
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filter_properties)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_migrate_share_set_error(self, context, ex, request_spec)
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else:
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share_ref = db.share_get(context, share_id)
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try:
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share_rpcapi.ShareAPI().migration_start(
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context, share_ref, tgt_host.host, force_host_copy,
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notify)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_migrate_share_set_error(self, context, ex, request_spec)
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def _set_share_state_and_notify(self, method, state, context, ex,
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request_spec):
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LOG.error(_LE("Failed to schedule %(method)s: %(ex)s"),
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{"method": method, "ex": six.text_type(ex)})
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properties = request_spec.get('share_properties', {})
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share_id = request_spec.get('share_id', None)
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if share_id:
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db.share_update(context, share_id, state)
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payload = dict(request_spec=request_spec,
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share_properties=properties,
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share_id=share_id,
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state=state,
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method=method,
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reason=ex)
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rpc.get_notifier("scheduler").error(
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context, 'scheduler.' + method, payload)
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def request_service_capabilities(self, context):
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share_rpcapi.ShareAPI().publish_service_capabilities(context)
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def _set_cg_error_state(self, method, context, ex, request_spec):
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LOG.warning(_LW("Failed to schedule_%(method)s: %(ex)s"),
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{"method": method, "ex": ex})
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cg_state = {'status': constants.STATUS_ERROR}
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consistency_group_id = request_spec.get('consistency_group_id')
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if consistency_group_id:
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db.consistency_group_update(context,
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consistency_group_id,
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cg_state)
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# TODO(ameade): add notifications
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def create_consistency_group(self, context, cg_id, request_spec=None,
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filter_properties=None):
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try:
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self.driver.schedule_create_consistency_group(context, cg_id,
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request_spec,
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filter_properties)
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except exception.NoValidHost as ex:
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self._set_cg_error_state('create_consistency_group',
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context, ex, request_spec)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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self._set_cg_error_state('create_consistency_group',
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context, ex, request_spec)
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def _set_share_replica_error_state(self, context, method, exc,
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request_spec):
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LOG.warning(_LW("Failed to schedule_%(method)s: %(exc)s"),
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{'method': method, 'exc': exc})
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status_updates = {
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'status': constants.STATUS_ERROR,
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'replica_state': constants.STATUS_ERROR,
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}
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share_replica_id = request_spec.get(
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'share_instance_properties').get('id')
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# Set any snapshot instances to 'error'.
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replica_snapshots = db.share_snapshot_instance_get_all_with_filters(
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context, {'share_instance_ids': share_replica_id})
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for snapshot_instance in replica_snapshots:
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db.share_snapshot_instance_update(
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context, snapshot_instance['id'],
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{'status': constants.STATUS_ERROR})
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db.share_replica_update(context, share_replica_id, status_updates)
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def create_share_replica(self, context, request_spec=None,
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filter_properties=None):
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try:
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self.driver.schedule_create_replica(context, request_spec,
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filter_properties)
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except exception.NoValidHost as exc:
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self._set_share_replica_error_state(
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context, 'create_share_replica', exc, request_spec)
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except Exception as exc:
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with excutils.save_and_reraise_exception():
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self._set_share_replica_error_state(
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context, 'create_share_replica', exc, request_spec)
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