72f5f0485a
The scheduler API 'get_pools' was copied from Cinder and has several problems. The REST endpoint, /scheduler-stats/get_pools, is not a REST-appropriate name. The API allows filtering but filters are not currently supported by the Manila scheduler. The API was added as an extension, not part of the v1 API as it should be. After restarting the scheduler service, the API doesn't return any data until a share has been created (Cinder was used as a model for fixing this one). This patch fixes all of these issues. Closes-Bug: #1422042 Change-Id: I7e32efb5390fd4b0a62f644ca5a12dcad14d8a9b
95 lines
3.5 KiB
Python
95 lines
3.5 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 base class that all Schedulers should inherit from
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"""
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from oslo_config import cfg
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from oslo_utils import importutils
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from oslo_utils import timeutils
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from manila import db
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from manila.i18n import _
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from manila.share import rpcapi as share_rpcapi
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from manila import utils
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scheduler_driver_opts = [
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cfg.StrOpt('scheduler_host_manager',
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default='manila.scheduler.host_manager.HostManager',
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help='The scheduler host manager class to use.'),
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cfg.IntOpt('scheduler_max_attempts',
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default=3,
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help='Maximum number of attempts to schedule a share.'),
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]
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CONF = cfg.CONF
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CONF.register_opts(scheduler_driver_opts)
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def share_update_db(context, share_id, host):
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'''Set the host and set the scheduled_at field of a share.
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:returns: A Share with the updated fields set properly.
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'''
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now = timeutils.utcnow()
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values = {'host': host, 'scheduled_at': now}
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return db.share_update(context, share_id, values)
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class Scheduler(object):
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"""The base class that all Scheduler classes should inherit from."""
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def __init__(self):
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self.host_manager = importutils.import_object(
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CONF.scheduler_host_manager)
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self.share_rpcapi = share_rpcapi.ShareAPI()
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def get_host_list(self):
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"""Get a list of hosts from the HostManager."""
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return self.host_manager.get_host_list()
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def get_service_capabilities(self):
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"""Get the normalized set of capabilities for the services."""
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return self.host_manager.get_service_capabilities()
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def update_service_capabilities(self, service_name, host, capabilities):
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"""Process a capability update from a service node."""
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self.host_manager.update_service_capabilities(service_name,
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host,
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capabilities)
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def hosts_up(self, context, topic):
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"""Return the list of hosts that have a running service for topic."""
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services = db.service_get_all_by_topic(context, topic)
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return [service['host']
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for service in services
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if utils.service_is_up(service)]
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def schedule(self, context, topic, method, *_args, **_kwargs):
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"""Must override schedule method for scheduler to work."""
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raise NotImplementedError(_("Must implement a fallback schedule"))
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def schedule_create_share(self, context, request_spec, filter_properties):
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"""Must override schedule method for scheduler to work."""
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raise NotImplementedError(_("Must implement schedule_create_share"))
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def get_pools(self, context, filters):
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"""Must override schedule method for scheduler to work."""
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raise NotImplementedError(_("Must implement get_pools"))
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