85 lines
3.1 KiB
Python
85 lines
3.1 KiB
Python
# Copyright 2012 IBM Corp.
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# Copyright (c) AT&T Labs Inc. 2012 Yun Mao <yunmao@gmail.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Define APIs for the servicegroup access."""
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from oslo_log import log as logging
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from oslo_utils import importutils
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import nova.conf
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from nova.i18n import _LW
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LOG = logging.getLogger(__name__)
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_driver_name_class_mapping = {
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'db': 'nova.servicegroup.drivers.db.DbDriver',
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'mc': 'nova.servicegroup.drivers.mc.MemcachedDriver'
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}
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CONF = nova.conf.CONF
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# NOTE(geekinutah): By default drivers wait 5 seconds before reporting
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INITIAL_REPORTING_DELAY = 5
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class API(object):
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def __init__(self, *args, **kwargs):
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'''Create an instance of the servicegroup API.
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args and kwargs are passed down to the servicegroup driver when it gets
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created.
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'''
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# Make sure report interval is less than service down time
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report_interval = CONF.report_interval
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if CONF.service_down_time <= report_interval:
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new_service_down_time = int(report_interval * 2.5)
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LOG.warning(_LW("Report interval must be less than service down "
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"time. Current config: <service_down_time: "
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"%(service_down_time)s, report_interval: "
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"%(report_interval)s>. Setting service_down_time "
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"to: %(new_service_down_time)s"),
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{'service_down_time': CONF.service_down_time,
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'report_interval': report_interval,
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'new_service_down_time': new_service_down_time})
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CONF.set_override('service_down_time', new_service_down_time)
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driver_class = _driver_name_class_mapping[CONF.servicegroup_driver]
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self._driver = importutils.import_object(driver_class,
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*args, **kwargs)
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def join(self, member, group, service=None):
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"""Add a new member to a service group.
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:param member: the joined member ID/name
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:param group: the group ID/name, of the joined member
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:param service: a `nova.service.Service` object
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"""
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return self._driver.join(member, group, service)
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def service_is_up(self, member):
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"""Check if the given member is up."""
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# NOTE(johngarbutt) no logging in this method,
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# so this doesn't slow down the scheduler
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if member.get('forced_down'):
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return False
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return self._driver.is_up(member)
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def get_updated_time(self, member):
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"""Get the updated time from drivers except db"""
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return self._driver.updated_time(member)
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