a4d31eac42
Use latest release 1.1.0 and compatible changes w.r.t pep8 Change-Id: If1860c3fe287852e87704b511567c65d8d4d0c1c
129 lines
5.2 KiB
Python
129 lines
5.2 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2017 Servionica
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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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import datetime
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import itertools
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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 timeutils
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import six
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from watcher.common import context as watcher_context
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from watcher.common import scheduling
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from watcher import notifications
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from watcher import objects
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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class APISchedulingService(scheduling.BackgroundSchedulerService):
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def __init__(self, gconfig=None, **options):
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self.services_status = {}
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gconfig = None or {}
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super(APISchedulingService, self).__init__(gconfig, **options)
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def get_services_status(self, context):
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services = objects.service.Service.list(context)
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active_s = objects.service.ServiceStatus.ACTIVE
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failed_s = objects.service.ServiceStatus.FAILED
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for service in services:
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result = self.get_service_status(context, service.id)
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if service.id not in self.services_status:
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self.services_status[service.id] = result
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continue
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if self.services_status[service.id] != result:
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self.services_status[service.id] = result
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notifications.service.send_service_update(context, service,
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state=result)
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if (result == failed_s) and (
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service.name == 'watcher-decision-engine'):
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audit_filters = {
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'audit_type': objects.audit.AuditType.CONTINUOUS.value,
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'state': objects.audit.State.ONGOING,
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'hostname': service.host
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}
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ongoing_audits = objects.Audit.list(
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context,
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filters=audit_filters,
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eager=True)
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alive_services = [
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s.host for s in services
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if (self.services_status[s.id] == active_s and
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s.name == 'watcher-decision-engine')]
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round_robin = itertools.cycle(alive_services)
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for audit in ongoing_audits:
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audit.hostname = round_robin.__next__()
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audit.save()
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LOG.info('Audit %(audit)s has been migrated to '
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'%(host)s since %(failed_host)s is in'
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' %(state)s',
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{'audit': audit.uuid,
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'host': audit.hostname,
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'failed_host': service.host,
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'state': failed_s})
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def get_service_status(self, context, service_id):
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service = objects.Service.get(context, service_id)
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last_heartbeat = (service.last_seen_up or service.updated_at or
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service.created_at)
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if isinstance(last_heartbeat, six.string_types):
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# NOTE(russellb) If this service came in over rpc via
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# conductor, then the timestamp will be a string and needs to be
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# converted back to a datetime.
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last_heartbeat = timeutils.parse_strtime(last_heartbeat)
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else:
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# Objects have proper UTC timezones, but the timeutils comparison
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# below does not (and will fail)
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last_heartbeat = last_heartbeat.replace(tzinfo=None)
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elapsed = timeutils.delta_seconds(last_heartbeat, timeutils.utcnow())
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is_up = abs(elapsed) <= CONF.service_down_time
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if not is_up:
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LOG.warning('Seems service %(name)s on host %(host)s is down. '
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'Last heartbeat was %(lhb)s. Elapsed time is %(el)s',
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{'name': service.name,
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'host': service.host,
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'lhb': str(last_heartbeat), 'el': str(elapsed)})
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return objects.service.ServiceStatus.FAILED
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return objects.service.ServiceStatus.ACTIVE
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def start(self):
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"""Start service."""
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context = watcher_context.make_context(is_admin=True)
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self.add_job(self.get_services_status, name='service_status',
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trigger='interval', jobstore='default', args=[context],
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next_run_time=datetime.datetime.now(),
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seconds=CONF.periodic_interval)
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super(APISchedulingService, self).start()
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def stop(self):
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"""Stop service."""
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self.shutdown()
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def wait(self):
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"""Wait for service to complete."""
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def reset(self):
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"""Reset service.
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Called in case service running in daemon mode receives SIGHUP.
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"""
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