133 lines
4.2 KiB
Python
Executable File
133 lines
4.2 KiB
Python
Executable File
# -*- encoding: utf-8 -*-
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#
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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#
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# Copyright (c) 2013-2016 Wind River Systems, Inc.
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#
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"""
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Handle lease database updates from dnsmasq DHCP server
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This file was based on dhcpbridge.py from nova
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"""
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from __future__ import print_function
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import os
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import sys
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from inventory.common import context
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from inventory.common.i18n import _
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from inventory.common import service as inventory_service
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from inventory.conductor import rpcapi as conductor_rpcapi
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from oslo_config import cfg
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from oslo_log import log
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CONF = cfg.CONF
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def add_lease(mac, ip_address):
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"""Called when a new lease is created."""
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ctxt = context.get_admin_context()
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rpcapi = \
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conductor_rpcapi.ConductorAPI(topic=conductor_rpcapi.MANAGER_TOPIC)
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cid = None
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cid = os.getenv('DNSMASQ_CLIENT_ID')
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tags = None
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tags = os.getenv('DNSMASQ_TAGS')
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if tags is not None:
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# TODO(sc): Maybe this shouldn't be synchronous - if this hangs,
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# we could cause dnsmasq to get stuck...
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rpcapi.handle_dhcp_lease(ctxt, tags, mac, ip_address, cid)
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def old_lease(mac, ip_address):
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"""Called when an old lease is recognized."""
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# This happens when a node is rebooted, but it can also happen if the
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# node was deleted and then rebooted, so we need to re-add in that case.
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ctxt = context.get_admin_context()
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rpcapi = conductor_rpcapi.ConductorAPI(
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topic=conductor_rpcapi.MANAGER_TOPIC)
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cid = None
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cid = os.getenv('DNSMASQ_CLIENT_ID')
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tags = None
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tags = os.getenv('DNSMASQ_TAGS')
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if tags is not None:
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# TODO(sc): Maybe this shouldn't be synchronous - if this hangs,
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# we could cause dnsmasq to get stuck...
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rpcapi.handle_dhcp_lease(ctxt, tags, mac, ip_address, cid)
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def del_lease(mac, ip_address):
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"""Called when a lease expires."""
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# We will only delete the ihost when it is requested by the user.
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pass
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def add_action_parsers(subparsers):
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# NOTE(cfb): dnsmasq always passes mac, and ip. hostname
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# is passed if known. We don't care about
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# hostname, but argparse will complain if we
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# do not accept it.
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for action in ['add', 'del', 'old']:
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parser = subparsers.add_parser(action)
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parser.add_argument('mac')
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parser.add_argument('ip')
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parser.add_argument('hostname', nargs='?', default='')
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parser.set_defaults(func=globals()[action + '_lease'])
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CONF.register_cli_opt(
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cfg.SubCommandOpt('action',
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title='Action options',
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help='Available dnsmasq_lease_update options',
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handler=add_action_parsers))
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def main():
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# Parse config file and command line options, then start logging
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# The mac is to be truncated to 17 characters, which is the proper
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# length of a mac address, in order to handle IPv6 where a DUID
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# is provided instead of a mac address. The truncated DUID is
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# then equivalent to the mac address.
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inventory_service.prepare_service(sys.argv)
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LOG = log.getLogger(__name__)
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if CONF.action.name in ['add', 'del', 'old']:
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msg = (_("Called '%(action)s' for mac '%(mac)s' with ip '%(ip)s'") %
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{"action": CONF.action.name,
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"mac": CONF.action.mac[-17:],
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"ip": CONF.action.ip})
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LOG.info(msg)
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CONF.action.func(CONF.action.mac[-17:], CONF.action.ip)
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else:
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LOG.error(_("Unknown action: %(action)") % {"action":
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CONF.action.name})
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