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
58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
# Copyright 2014 Cloudbase Solutions Srl
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import struct
|
|
|
|
from oslo_config import cfg
|
|
from oslo_log import log as oslo_logging
|
|
|
|
from cloudbaseinit.osutils import factory as osutils_factory
|
|
from cloudbaseinit.plugins.common import base
|
|
from cloudbaseinit.utils import dhcp
|
|
|
|
|
|
opts = [
|
|
cfg.BoolOpt('mtu_use_dhcp_config', default=True,
|
|
help='Configures the network interfaces MTU based on the '
|
|
'values provided via DHCP'),
|
|
]
|
|
|
|
CONF = cfg.CONF
|
|
CONF.register_opts(opts)
|
|
|
|
LOG = oslo_logging.getLogger(__name__)
|
|
|
|
|
|
class MTUPlugin(base.BasePlugin):
|
|
execution_stage = base.PLUGIN_STAGE_PRE_METADATA_DISCOVERY
|
|
|
|
def execute(self, service, shared_data):
|
|
if CONF.mtu_use_dhcp_config:
|
|
osutils = osutils_factory.get_os_utils()
|
|
dhcp_hosts = osutils.get_dhcp_hosts_in_use()
|
|
|
|
for (mac_address, dhcp_host) in dhcp_hosts:
|
|
options_data = dhcp.get_dhcp_options(dhcp_host,
|
|
[dhcp.OPTION_MTU])
|
|
if options_data:
|
|
mtu_option_data = options_data.get(dhcp.OPTION_MTU)
|
|
if mtu_option_data:
|
|
mtu = struct.unpack('!H', mtu_option_data)[0]
|
|
osutils.set_network_adapter_mtu(mac_address, mtu)
|
|
else:
|
|
LOG.debug('Could not obtain the MTU configuration '
|
|
'via DHCP for interface "%s"' % mac_address)
|
|
|
|
return base.PLUGIN_EXECUTE_ON_NEXT_BOOT, False
|