145 lines
4.9 KiB
Python
145 lines
4.9 KiB
Python
# 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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#
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# Copyright (c) 2020 Wind River Systems, Inc.
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#
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# The right to copy, distribute, modify, or otherwise make use
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# of this software may be licensed only pursuant to the terms
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# of an applicable Wind River license agreement.
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#
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from oslo_config import cfg
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import greenlet
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from eventlet import greenthread
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from oslo_log import log
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from oslo_service import periodic_task
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import time
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from sysinv.openstack.common import context
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from sysinv.cert_mon import watcher
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LOG = log.getLogger(__name__)
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cert_mon_opts = [
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cfg.IntOpt('audit_interval',
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default=86400, # 24 hours
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help='Interval to run certificate audit'),
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cfg.IntOpt('retry_interval',
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default=10,
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help='interval to reattempt accessing external system '
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'if failure occurred'),
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cfg.IntOpt('max_retry',
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default=5,
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help='interval to reattempt accessing external system '
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'if failure occurred'),
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]
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CONF = cfg.CONF
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CONF.register_opts(cert_mon_opts, 'certmon')
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class CertificateMonManager(periodic_task.PeriodicTasks):
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def __init__(self):
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super(CertificateMonManager, self).__init__(CONF)
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self.mon_thread = None
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self.audit_thread = None
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self.monitor = None
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self.reattempt_tasks = []
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def periodic_tasks(self, context, raise_on_error=False):
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"""Tasks to be run at a periodic interval."""
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return self.run_periodic_tasks(context, raise_on_error=raise_on_error)
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@periodic_task.periodic_task(spacing=CONF.certmon.audit_interval)
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def audit_cert_task(self, context):
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# [Place holder for] auditing subcloud certificate
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# this task runs every very long period of time, such as 24 hours
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LOG.info('Audit certificate')
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@periodic_task.periodic_task(spacing=CONF.certmon.retry_interval)
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def retry_task(self, context):
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# Failed tasks that need to be reattempted will be taken care here
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max_attempts = CONF.certmon.max_retry
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tasks = self.reattempt_tasks[:]
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for task in tasks:
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if task.run():
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self.reattempt_tasks.remove(task)
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LOG.info('Reattempt has succeeded')
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elif task.number_of_reattempt == max_attempts:
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LOG.error('Maximum attempts (%s) has been reached. Give up' %
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max_attempts)
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if task in self.reattempt_tasks:
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self.reattempt_tasks.remove(task)
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def start_audit(self):
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LOG.info('Auditing interval %s' % CONF.certmon.audit_interval)
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self.audit_thread = greenthread.spawn(self.audit_cert)
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def init_monitor(self):
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self.monitor = watcher.CertWatcher()
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self.monitor.initialize()
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def start_monitor(self):
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while True:
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try:
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self.init_monitor()
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except Exception as e:
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LOG.error(e)
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time.sleep(CONF.certmon.retry_interval)
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else:
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break
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self.mon_thread = greenthread.spawn(self.monitor_cert)
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def stop_monitor(self):
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if self.mon_thread:
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self.mon_thread.kill()
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self.mon_thread.wait()
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def stop_audit(self):
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if self.audit_thread:
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self.audit_thread.kill()
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self.audit_thread.wait()
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def audit_cert(self):
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admin_context = context.RequestContext('admin', 'admin', is_admin=True)
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while True:
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try:
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self.run_periodic_tasks(context=admin_context)
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time.sleep(1)
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except greenlet.GreenletExit:
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break
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except Exception as e:
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LOG.error(e)
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def monitor_cert(self):
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while True:
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# never exit until exit signal received
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try:
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self.monitor.start_watch(
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func=lambda task: self._add_reattempt_task(task))
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except greenlet.GreenletExit:
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break
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except Exception as e:
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# A bug somewhere?
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# It shouldn't fall to here, but log and restart if it did
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LOG.error(e)
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def _add_reattempt_task(self, task):
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id = task.get_id()
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for t in self.reattempt_tasks:
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if t.get_id() == id:
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self.reattempt_tasks.remove(t)
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LOG.info('Older task %s is replaced with new task' % id)
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break
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self.reattempt_tasks.append(task)
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