From 4ef110fd2c501b718344c72d495ad7e16d2bd465 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Sat, 30 Dec 2023 23:25:20 +0100 Subject: T5474: establish common file name pattern for XML conf mode commands We will use _ as CLI level divider. The XML definition filename and also the Python helper should match the CLI node. Example: set interfaces ethernet -> interfaces_ethernet.xml.in set interfaces bond -> interfaces_bond.xml.in set service dhcp-server -> service_dhcp-server-xml.in --- src/conf_mode/service_conntrack-sync.py | 141 ++++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100755 src/conf_mode/service_conntrack-sync.py (limited to 'src/conf_mode/service_conntrack-sync.py') diff --git a/src/conf_mode/service_conntrack-sync.py b/src/conf_mode/service_conntrack-sync.py new file mode 100755 index 000000000..4fb2ce27f --- /dev/null +++ b/src/conf_mode/service_conntrack-sync.py @@ -0,0 +1,141 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2021 VyOS maintainers and contributors +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 2 or later as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +import os + +from sys import exit +from vyos.config import Config +from vyos.configverify import verify_interface_exists +from vyos.utils.dict import dict_search +from vyos.utils.process import process_named_running +from vyos.utils.file import read_file +from vyos.utils.process import call +from vyos.utils.process import run +from vyos.template import render +from vyos.template import get_ipv4 +from vyos.utils.network import is_addr_assigned +from vyos import ConfigError +from vyos import airbag +airbag.enable() + +config_file = '/run/conntrackd/conntrackd.conf' + +def resync_vrrp(): + tmp = run('/usr/libexec/vyos/conf_mode/high-availability.py') + if tmp > 0: + print('ERROR: error restarting VRRP daemon!') + +def get_config(config=None): + if config: + conf = config + else: + conf = Config() + base = ['service', 'conntrack-sync'] + if not conf.exists(base): + return None + + conntrack = conf.get_config_dict(base, key_mangling=('-', '_'), + get_first_key=True, with_defaults=True) + + conntrack['hash_size'] = read_file('/sys/module/nf_conntrack/parameters/hashsize') + conntrack['table_size'] = read_file('/proc/sys/net/netfilter/nf_conntrack_max') + + conntrack['vrrp'] = conf.get_config_dict(['high-availability', 'vrrp', 'sync-group'], + get_first_key=True) + + return conntrack + +def verify(conntrack): + if not conntrack: + return None + + if 'interface' not in conntrack: + raise ConfigError('Interface not defined!') + + has_peer = False + for interface, interface_config in conntrack['interface'].items(): + verify_interface_exists(interface) + # Interface must not only exist, it must also carry an IP address + if len(get_ipv4(interface)) < 1: + raise ConfigError(f'Interface {interface} requires an IP address!') + if 'peer' in interface_config: + has_peer = True + + # If one interface runs in unicast mode instead of multicast, so must all the + # others, else conntrackd will error out with: "cannot use UDP with other + # dedicated link protocols" + if has_peer: + for interface, interface_config in conntrack['interface'].items(): + if 'peer' not in interface_config: + raise ConfigError('Can not mix unicast and multicast mode!') + + if 'expect_sync' in conntrack: + if len(conntrack['expect_sync']) > 1 and 'all' in conntrack['expect_sync']: + raise ConfigError('Can not configure expect-sync "all" with other protocols!') + + if 'listen_address' in conntrack: + for address in conntrack['listen_address']: + if not is_addr_assigned(address): + raise ConfigError(f'Specified listen-address {address} not assigned to any interface!') + + vrrp_group = dict_search('failover_mechanism.vrrp.sync_group', conntrack) + if vrrp_group == None: + raise ConfigError(f'No VRRP sync-group defined!') + if vrrp_group not in conntrack['vrrp']: + raise ConfigError(f'VRRP sync-group {vrrp_group} not configured!') + + return None + +def generate(conntrack): + if not conntrack: + if os.path.isfile(config_file): + os.unlink(config_file) + return None + + render(config_file, 'conntrackd/conntrackd.conf.j2', conntrack) + + return None + +def apply(conntrack): + systemd_service = 'conntrackd.service' + if not conntrack: + # Failover mechanism daemon should be indicated that it no longer needs + # to execute conntrackd actions on transition. This is only required + # once when conntrackd is stopped and taken out of service! + if process_named_running('conntrackd'): + resync_vrrp() + + call(f'systemctl stop {systemd_service}') + return None + + # Failover mechanism daemon should be indicated that it needs to execute + # conntrackd actions on transition. This is only required once when conntrackd + # is started the first time! + if not process_named_running('conntrackd'): + resync_vrrp() + + call(f'systemctl reload-or-restart {systemd_service}') + return None + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) -- cgit v1.2.3