115 lines
4.4 KiB
Python
115 lines
4.4 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 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 import manager
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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 import rpc
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from manila.share import rpcapi as share_rpcapi
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LOG = logging.getLogger(__name__)
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scheduler_driver_opt = cfg.StrOpt('scheduler_driver',
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default='manila.scheduler.filter_scheduler.'
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'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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class SchedulerManager(manager.Manager):
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"""Chooses a host to create shares."""
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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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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(self, context, topic, share_id, snapshot_id=None,
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request_spec=None, 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_error_state_and_notify('create_share',
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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_error_state_and_notify('create_share',
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context, ex,
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request_spec)
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def _set_share_error_state_and_notify(self, method, context, ex,
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request_spec):
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LOG.warning(_("Failed to schedule_%(method)s: %(ex)s") %
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{"method": method, "ex": ex})
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share_state = {'status': 'error'}
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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, share_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=share_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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