a855b7fdc4
Some plugins need to be executed before metadata discovery starts, e.g. for MTU or NTP settings. This commit adds support for plugin execution stages. Co-Authored-By: Cosmin Poieana <cpoieana@cloudbasesolutions.com> Change-Id: Ia2d7dfc812d04f04269ea3e1cee3e9ed61037e17 Implements: blueprint plugin-stages
79 lines
2.7 KiB
Python
79 lines
2.7 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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from oslo_config import cfg
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from oslo_log import log as oslo_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 = oslo_logging.getLogger(__name__)
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class NTPClientPlugin(base.BasePlugin):
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execution_stage = base.PLUGIN_STAGE_PRE_NETWORKING
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def verify_time_service(self, osutils):
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"""Verify that the time service is up.
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Implementing this method is optional, it is
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mostly used by the Windows version of this plugin.
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"""
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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 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 (_, 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.verify_time_service(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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