diff options
Diffstat (limited to 'src/conf_mode/interfaces_bonding.py')
| -rwxr-xr-x | src/conf_mode/interfaces_bonding.py | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_bonding.py b/src/conf_mode/interfaces_bonding.py new file mode 100755 index 000000000..8184d8415 --- /dev/null +++ b/src/conf_mode/interfaces_bonding.py @@ -0,0 +1,294 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019-2023 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 +# 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 <http://www.gnu.org/licenses/>. + +import os + +from sys import exit +from netifaces import interfaces +from vyos.config import Config +from vyos.configdict import get_interface_dict +from vyos.configdict import is_node_changed +from vyos.configdict import leaf_node_changed +from vyos.configdict import is_member +from vyos.configdict import is_source_interface +from vyos.configverify import verify_address +from vyos.configverify import verify_bridge_delete +from vyos.configverify import verify_dhcpv6 +from vyos.configverify import verify_mirror_redirect +from vyos.configverify import verify_mtu_ipv6 +from vyos.configverify import verify_source_interface +from vyos.configverify import verify_vlan_config +from vyos.configverify import verify_vrf +from vyos.ifconfig import BondIf +from vyos.ifconfig.ethernet import EthernetIf +from vyos.ifconfig import Section +from vyos.template import render_to_string +from vyos.utils.dict import dict_search +from vyos.utils.dict import dict_to_paths_values +from vyos.configdict import has_address_configured +from vyos.configdict import has_vrf_configured +from vyos.configdep import set_dependents, call_dependents +from vyos import ConfigError +from vyos import frr +from vyos import airbag +airbag.enable() + +def get_bond_mode(mode): + if mode == 'round-robin': + return 'balance-rr' + elif mode == 'active-backup': + return 'active-backup' + elif mode == 'xor-hash': + return 'balance-xor' + elif mode == 'broadcast': + return 'broadcast' + elif mode == '802.3ad': + return '802.3ad' + elif mode == 'transmit-load-balance': + return 'balance-tlb' + elif mode == 'adaptive-load-balance': + return 'balance-alb' + else: + raise ConfigError(f'invalid bond mode "{mode}"') + +def get_config(config=None): + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ + if config: + conf = config + else: + conf = Config() + base = ['interfaces', 'bonding'] + ifname, bond = get_interface_dict(conf, base) + + # To make our own life easier transfor the list of member interfaces + # into a dictionary - we will use this to add additional information + # later on for each member + if 'member' in bond and 'interface' in bond['member']: + # convert list of member interfaces to a dictionary + bond['member']['interface'] = {k: {} for k in bond['member']['interface']} + + if 'mode' in bond: + bond['mode'] = get_bond_mode(bond['mode']) + + tmp = is_node_changed(conf, base + [ifname, 'mode']) + if tmp: bond['shutdown_required'] = {} + + tmp = is_node_changed(conf, base + [ifname, 'lacp-rate']) + if tmp: bond['shutdown_required'] = {} + + # determine which members have been removed + interfaces_removed = leaf_node_changed(conf, base + [ifname, 'member', 'interface']) + # Reset config level to interfaces + old_level = conf.get_level() + conf.set_level(['interfaces']) + + if interfaces_removed: + bond['shutdown_required'] = {} + if 'member' not in bond: + bond['member'] = {} + + tmp = {} + for interface in interfaces_removed: + # if member is deleted from bond, add dependencies to call + # ethernet commit again in apply function + # to apply options under ethernet section + set_dependents('ethernet', conf, interface) + section = Section.section(interface) # this will be 'ethernet' for 'eth0' + if conf.exists([section, interface, 'disable']): + tmp[interface] = {'disable': ''} + else: + tmp[interface] = {} + + # also present the interfaces to be removed from the bond as dictionary + bond['member']['interface_remove'] = tmp + + # Restore existing config level + conf.set_level(old_level) + + if dict_search('member.interface', bond): + for interface, interface_config in bond['member']['interface'].items(): + + interface_ethernet_config = conf.get_config_dict( + ['interfaces', 'ethernet', interface], + key_mangling=('-', '_'), + get_first_key=True, + no_tag_node_value_mangle=True, + with_defaults=False, + with_recursive_defaults=False) + + interface_config['config_paths'] = dict_to_paths_values(interface_ethernet_config) + + # Check if member interface is a new member + if not conf.exists_effective(base + [ifname, 'member', 'interface', interface]): + bond['shutdown_required'] = {} + interface_config['new_added'] = {} + + # Check if member interface is disabled + conf.set_level(['interfaces']) + + section = Section.section(interface) # this will be 'ethernet' for 'eth0' + if conf.exists([section, interface, 'disable']): + interface_config['disable'] = '' + + conf.set_level(old_level) + + # Check if member interface is already member of another bridge + tmp = is_member(conf, interface, 'bridge') + if tmp: interface_config['is_bridge_member'] = tmp + + # Check if member interface is already member of a bond + tmp = is_member(conf, interface, 'bonding') + for tmp in is_member(conf, interface, 'bonding'): + if bond['ifname'] == tmp: + continue + interface_config['is_bond_member'] = tmp + + # Check if member interface is used as source-interface on another interface + tmp = is_source_interface(conf, interface) + if tmp: interface_config['is_source_interface'] = tmp + + # bond members must not have an assigned address + tmp = has_address_configured(conf, interface) + if tmp: interface_config['has_address'] = {} + + # bond members must not have a VRF attached + tmp = has_vrf_configured(conf, interface) + if tmp: interface_config['has_vrf'] = {} + return bond + + +def verify(bond): + if 'deleted' in bond: + verify_bridge_delete(bond) + return None + + if 'arp_monitor' in bond: + if 'target' in bond['arp_monitor'] and len(bond['arp_monitor']['target']) > 16: + raise ConfigError('The maximum number of arp-monitor targets is 16') + + if 'interval' in bond['arp_monitor'] and int(bond['arp_monitor']['interval']) > 0: + if bond['mode'] in ['802.3ad', 'balance-tlb', 'balance-alb']: + raise ConfigError('ARP link monitoring does not work for mode 802.3ad, ' \ + 'transmit-load-balance or adaptive-load-balance') + + if 'primary' in bond: + if bond['mode'] not in ['active-backup', 'balance-tlb', 'balance-alb']: + raise ConfigError('Option primary - mode dependency failed, not' + 'supported in mode {mode}!'.format(**bond)) + + verify_mtu_ipv6(bond) + verify_address(bond) + verify_dhcpv6(bond) + verify_vrf(bond) + verify_mirror_redirect(bond) + + # use common function to verify VLAN configuration + verify_vlan_config(bond) + + bond_name = bond['ifname'] + if dict_search('member.interface', bond): + for interface, interface_config in bond['member']['interface'].items(): + error_msg = f'Can not add interface "{interface}" to bond, ' + + if interface == 'lo': + raise ConfigError('Loopback interface "lo" can not be added to a bond') + + if interface not in interfaces(): + raise ConfigError(error_msg + 'it does not exist!') + + if 'is_bridge_member' in interface_config: + tmp = next(iter(interface_config['is_bridge_member'])) + raise ConfigError(error_msg + f'it is already a member of bridge "{tmp}"!') + + if 'is_bond_member' in interface_config: + tmp = next(iter(interface_config['is_bond_member'])) + raise ConfigError(error_msg + f'it is already a member of bond "{tmp}"!') + + if 'is_source_interface' in interface_config: + tmp = interface_config['is_source_interface'] + raise ConfigError(error_msg + f'it is the source-interface of "{tmp}"!') + + if 'has_address' in interface_config: + raise ConfigError(error_msg + 'it has an address assigned!') + + if 'has_vrf' in interface_config: + raise ConfigError(error_msg + 'it has a VRF assigned!') + + if 'new_added' in interface_config and 'config_paths' in interface_config: + for option_path, option_value in interface_config['config_paths'].items(): + if option_path in EthernetIf.get_bond_member_allowed_options() : + continue + if option_path in BondIf.get_inherit_bond_options(): + continue + raise ConfigError(error_msg + f'it has a "{option_path.replace(".", " ")}" assigned!') + + if 'primary' in bond: + if bond['primary'] not in bond['member']['interface']: + raise ConfigError(f'Primary interface of bond "{bond_name}" must be a member interface') + + if bond['mode'] not in ['active-backup', 'balance-tlb', 'balance-alb']: + raise ConfigError('primary interface only works for mode active-backup, ' \ + 'transmit-load-balance or adaptive-load-balance') + + return None + +def generate(bond): + bond['frr_zebra_config'] = '' + if 'deleted' not in bond: + bond['frr_zebra_config'] = render_to_string('frr/evpn.mh.frr.j2', bond) + return None + +def apply(bond): + ifname = bond['ifname'] + b = BondIf(ifname) + if 'deleted' in bond: + # delete interface + b.remove() + else: + b.update(bond) + + if dict_search('member.interface_remove', bond): + try: + call_dependents() + except ConfigError: + raise ConfigError('Error in updating ethernet interface ' + 'after deleting it from bond') + + zebra_daemon = 'zebra' + # Save original configuration prior to starting any commit actions + frr_cfg = frr.FRRConfig() + + # The route-map used for the FIB (zebra) is part of the zebra daemon + frr_cfg.load_configuration(zebra_daemon) + frr_cfg.modify_section(f'^interface {ifname}', stop_pattern='^exit', remove_stop_mark=True) + if 'frr_zebra_config' in bond: + frr_cfg.add_before(frr.default_add_before, bond['frr_zebra_config']) + frr_cfg.commit_configuration(zebra_daemon) + + return None + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |