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interfaces-bonding.py
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interfaces-bonding.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019-2020 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 leaf_node_changed
from vyos.configverify import verify_address
from vyos.configverify import verify_bridge_delete
from vyos.configverify import verify_dhcpv6
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.validate import is_member
from vyos.validate import has_address_configured
from vyos import ConfigError
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']
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 wach member
if 'member' in bond and 'interface' in bond['member']:
# first convert it to a list if only one member is given
if isinstance(bond['member']['interface'], str):
bond['member']['interface'] = [bond['member']['interface']]
tmp={}
for interface in bond['member']['interface']:
tmp.update({interface: {}})
bond['member']['interface'] = tmp
if 'mode' in bond:
bond['mode'] = get_bond_mode(bond['mode'])
tmp = leaf_node_changed(conf, ['mode'])
if tmp:
bond.update({'shutdown_required': ''})
# determine which members have been removed
tmp = leaf_node_changed(conf, ['member', 'interface'])
if tmp:
bond.update({'shutdown_required': ''})
if 'member' in bond:
bond['member'].update({'interface_remove': tmp })
else:
bond.update({'member': {'interface_remove': tmp }})
if 'member' in bond and 'interface' in bond['member']:
for interface, interface_config in bond['member']['interface'].items():
# Check if we are a member of another bond device
tmp = is_member(conf, interface, 'bridge')
if tmp:
interface_config.update({'is_bridge_member' : tmp})
# Check if we are a member of a bond device
tmp = is_member(conf, interface, 'bonding')
if tmp and tmp != bond['ifname']:
interface_config.update({'is_bond_member' : tmp})
# bond members must not have an assigned address
tmp = has_address_configured(conf, interface)
if tmp:
interface_config.update({'has_address' : ''})
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(int(bond['arp_monitor']['target'])) > 16:
raise ConfigError('The maximum number of arp-monitor targets is 16')
if 'interval' in bond['arp_monitor'] and len(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_address(bond)
verify_dhcpv6(bond)
verify_vrf(bond)
# use common function to verify VLAN configuration
verify_vlan_config(bond)
bond_name = bond['ifname']
if 'member' in bond:
member = bond.get('member')
for interface, interface_config in member.get('interface', {}).items():
error_msg = f'Can not add interface "{interface}" to bond "{bond_name}", '
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 = 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 = interface_config['is_bond_member']
raise ConfigError(error_msg + f'it is already a member of bond "{tmp}"!')
if 'has_address' in interface_config:
raise ConfigError(error_msg + 'it has an address 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):
return None
def apply(bond):
b = BondIf(bond['ifname'])
if 'deleted' in bond:
# delete interface
b.remove()
else:
b.update(bond)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)

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