89 lines
2.5 KiB
Python
89 lines
2.5 KiB
Python
# Copyright 2014 DreamHost, LLC
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#
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# Author: DreamHost, LLC
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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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"""Populate the workers with the existing routers
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"""
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import logging
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import threading
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import time
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from oslo.config import cfg
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from neutronclient.common import exceptions as q_exceptions
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from akanda.rug import event
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from akanda.rug.api import neutron
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LOG = logging.getLogger(__name__)
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def _pre_populate_workers(scheduler):
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"""Fetch the existing routers from neutron.
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Wait for neutron to return the list of the existing routers.
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Pause up to max_sleep seconds between each attempt and ignore
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neutron client exceptions.
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"""
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nap_time = 1
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max_sleep = 15
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neutron_client = neutron.Neutron(cfg.CONF)
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while True:
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try:
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neutron_routers = neutron_client.get_routers(detailed=False)
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break
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except (q_exceptions.Unauthorized, q_exceptions.Forbidden) as err:
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LOG.warning('PrePopulateWorkers thread failed: %s', err)
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return
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except Exception as err:
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LOG.warning(
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'%s: %s' % ('Could not fetch routers from neutron', err))
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LOG.warning('sleeping %s seconds before retrying' % nap_time)
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time.sleep(nap_time)
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# FIXME(rods): should we get max_sleep from the config file?
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nap_time = min(nap_time * 2, max_sleep)
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LOG.debug('Start pre-populating the workers with %d fetched routers',
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len(neutron_routers))
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for router in neutron_routers:
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message = event.Event(
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tenant_id=router.tenant_id,
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router_id=router.id,
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crud=event.POLL,
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body={}
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)
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scheduler.handle_message(router.tenant_id, message)
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def pre_populate_workers(scheduler):
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"""Start the pre-populating task
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"""
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t = threading.Thread(
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target=_pre_populate_workers,
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args=(scheduler,),
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name='PrePopulateWorkers'
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)
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t.setDaemon(True)
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t.start()
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return t
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