diff options
Diffstat (limited to 'src/conf_mode/load-balancing-wan.py')
| -rwxr-xr-x | src/conf_mode/load-balancing-wan.py | 132 |
1 files changed, 124 insertions, 8 deletions
diff --git a/src/conf_mode/load-balancing-wan.py b/src/conf_mode/load-balancing-wan.py index 11840249f..7086aaf8b 100755 --- a/src/conf_mode/load-balancing-wan.py +++ b/src/conf_mode/load-balancing-wan.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 # -# Copyright (C) 2022 VyOS maintainers and contributors +# Copyright (C) 2023 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 @@ -14,17 +14,25 @@ # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. +import os from sys import exit +from shutil import rmtree +from vyos.base import Warning from vyos.config import Config -from vyos.configdict import node_changed -from vyos.util import call +from vyos.configdict import dict_merge +from vyos.util import cmd +from vyos.template import render +from vyos.xml import defaults from vyos import ConfigError -from pprint import pprint from vyos import airbag airbag.enable() +load_balancing_dir = '/run/load-balance' +load_balancing_conf_file = f'{load_balancing_dir}/wlb.conf' +systemd_service = 'vyos-wan-load-balance.service' + def get_config(config=None): if config: @@ -33,27 +41,135 @@ def get_config(config=None): conf = Config() base = ['load-balancing', 'wan'] - lb = conf.get_config_dict(base, get_first_key=True, - no_tag_node_value_mangle=True) + lb = conf.get_config_dict(base, + get_first_key=True, + key_mangling=('-', '_'), + no_tag_node_value_mangle=True) + + # We have gathered the dict representation of the CLI, but there are default + # options which we need to update into the dictionary retrived. + default_values = defaults(base) + # lb base default values can not be merged here - remove and add them later + if 'interface_health' in default_values: + del default_values['interface_health'] + if 'rule' in default_values: + del default_values['rule'] + lb = dict_merge(default_values, lb) + + if 'interface_health' in lb: + for iface in lb.get('interface_health'): + default_values_iface = defaults(base + ['interface-health']) + if 'test' in default_values_iface: + del default_values_iface['test'] + lb['interface_health'][iface] = dict_merge( + default_values_iface, lb['interface_health'][iface]) + if 'test' in lb['interface_health'][iface]: + for node_test in lb['interface_health'][iface]['test']: + default_values_test = defaults(base + + ['interface-health', 'test']) + lb['interface_health'][iface]['test'][node_test] = dict_merge( + default_values_test, + lb['interface_health'][iface]['test'][node_test]) + + if 'rule' in lb: + for rule in lb.get('rule'): + default_values_rule = defaults(base + ['rule']) + if 'interface' in default_values_rule: + del default_values_rule['interface'] + lb['rule'][rule] = dict_merge(default_values_rule, lb['rule'][rule]) + if not conf.exists(base + ['rule', rule, 'limit']): + del lb['rule'][rule]['limit'] + if 'interface' in lb['rule'][rule]: + for iface in lb['rule'][rule]['interface']: + default_values_rule_iface = defaults(base + ['rule', 'interface']) + lb['rule'][rule]['interface'][iface] = dict_merge(default_values_rule_iface, lb['rule'][rule]['interface'][iface]) - pprint(lb) return lb + def verify(lb): - return None + if not lb: + return None + + if 'interface_health' not in lb: + raise ConfigError( + 'A valid WAN load-balance configuration requires an interface with a nexthop!' + ) + + for interface, interface_config in lb['interface_health'].items(): + if 'nexthop' not in interface_config: + raise ConfigError( + f'interface-health {interface} nexthop must be specified!') + + if 'test' in interface_config: + for test_rule, test_config in interface_config['test'].items(): + if 'type' in test_config: + if test_config['type'] == 'user-defined' and 'test_script' not in test_config: + raise ConfigError( + f'test {test_rule} script must be defined for test-script!' + ) + + if 'rule' not in lb: + Warning( + 'At least one rule with an (outbound) interface must be defined for WAN load balancing to be active!' + ) + else: + for rule, rule_config in lb['rule'].items(): + if 'inbound_interface' not in rule_config: + raise ConfigError(f'rule {rule} inbound-interface must be specified!') + if {'failover', 'exclude'} <= set(rule_config): + raise ConfigError(f'rule {rule} failover cannot be configured with exclude!') + if {'limit', 'exclude'} <= set(rule_config): + raise ConfigError(f'rule {rule} limit cannot be used with exclude!') + if 'interface' not in rule_config: + if 'exclude' not in rule_config: + Warning( + f'rule {rule} will be inactive because no (outbound) interfaces have been defined for this rule' + ) + for direction in {'source', 'destination'}: + if direction in rule_config: + if 'protocol' in rule_config and 'port' in rule_config[ + direction]: + if rule_config['protocol'] not in {'tcp', 'udp'}: + raise ConfigError('ports can only be specified when protocol is "tcp" or "udp"') def generate(lb): if not lb: + # Delete /run/load-balance/wlb.conf + if os.path.isfile(load_balancing_conf_file): + os.unlink(load_balancing_conf_file) + # Delete old directories + if os.path.isdir(load_balancing_dir): + rmtree(load_balancing_dir, ignore_errors=True) + if os.path.exists('/var/run/load-balance/wlb.out'): + os.unlink('/var/run/load-balance/wlb.out') + return None + # Create load-balance dir + if not os.path.isdir(load_balancing_dir): + os.mkdir(load_balancing_dir) + + render(load_balancing_conf_file, 'load-balancing/wlb.conf.j2', lb) + return None def apply(lb): + if not lb: + try: + cmd(f'systemctl stop {systemd_service}') + except Exception as e: + print(f"Error message: {e}") + + else: + cmd('sudo sysctl -w net.netfilter.nf_conntrack_acct=1') + cmd(f'systemctl restart {systemd_service}') return None + if __name__ == '__main__': try: c = get_config() |