116 lines
4.1 KiB
Python
116 lines
4.1 KiB
Python
# Copyright 2014 Cloudbase Solutions Srl
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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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import socket
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import time
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from oslo.config import cfg
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from cloudbaseinit import exception
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from cloudbaseinit.openstack.common import log as logging
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from cloudbaseinit.osutils import factory as osutils_factory
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from cloudbaseinit.plugins.common import base
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from cloudbaseinit.utils import dhcp
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opts = [
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cfg.BoolOpt('ntp_use_dhcp_config', default=False,
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help='Configures NTP client time synchronization using '
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'the NTP servers provided via DHCP'),
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]
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CONF = cfg.CONF
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CONF.register_opts(opts)
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LOG = logging.getLogger(__name__)
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_W32TIME_SERVICE = "w32time"
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class NTPClientPlugin(base.BasePlugin):
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@staticmethod
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def _set_ntp_trigger_mode(osutils):
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"""Set the trigger mode for w32time service to network availability.
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This function changes the triggers for the w32time service, so that
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the service will always work when there's networking, but will
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stop itself whenever this condition stops being true.
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It also changes the current triggers of the service (domain joined
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for instance).
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"""
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args = ["sc.exe", "triggerinfo", _W32TIME_SERVICE,
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"start/networkon", "stop/networkoff"]
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return osutils.execute_system32_process(args)
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@staticmethod
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def _unpack_ntp_hosts(ntp_option_data):
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chunks = [ntp_option_data[index: index + 4]
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for index in range(0, len(ntp_option_data), 4)]
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return list(map(socket.inet_ntoa, chunks))
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def _check_w32time_svc_status(self, osutils):
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svc_start_mode = osutils.get_service_start_mode(
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_W32TIME_SERVICE)
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if svc_start_mode != osutils.SERVICE_START_MODE_AUTOMATIC:
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osutils.set_service_start_mode(
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_W32TIME_SERVICE,
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osutils.SERVICE_START_MODE_AUTOMATIC)
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if osutils.check_os_version(6, 0):
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self._set_ntp_trigger_mode(osutils)
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svc_status = osutils.get_service_status(_W32TIME_SERVICE)
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if svc_status == osutils.SERVICE_STATUS_STOPPED:
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osutils.start_service(_W32TIME_SERVICE)
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i = 0
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max_retries = 30
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while svc_status != osutils.SERVICE_STATUS_RUNNING:
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if i >= max_retries:
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raise exception.CloudbaseInitException(
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'Service %s did not start' % _W32TIME_SERVICE)
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time.sleep(1)
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svc_status = osutils.get_service_status(_W32TIME_SERVICE)
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i += 1
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def execute(self, service, shared_data):
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if CONF.ntp_use_dhcp_config:
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osutils = osutils_factory.get_os_utils()
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dhcp_hosts = osutils.get_dhcp_hosts_in_use()
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ntp_option_data = None
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for (mac_address, dhcp_host) in dhcp_hosts:
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options_data = dhcp.get_dhcp_options(dhcp_host,
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[dhcp.OPTION_NTP_SERVERS])
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if options_data:
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ntp_option_data = options_data.get(dhcp.OPTION_NTP_SERVERS)
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if ntp_option_data:
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break
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if not ntp_option_data:
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LOG.debug("Could not obtain the NTP configuration via DHCP")
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return (base.PLUGIN_EXECUTE_ON_NEXT_BOOT, False)
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ntp_hosts = self._unpack_ntp_hosts(ntp_option_data)
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self._check_w32time_svc_status(osutils)
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osutils.set_ntp_client_config(ntp_hosts)
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LOG.info('NTP client configured. Server(s): %s' % ntp_hosts)
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return (base.PLUGIN_EXECUTION_DONE, False)
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