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#!/usr/bin/env python3
#
# Copyright (C) 2020-2021 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 <http://www.gnu.org/licenses/>.
from sys import argv
from sys import exit
from vyos.config import Config
from vyos.template import render_to_string
from vyos import ConfigError
from vyos import frr
from vyos import airbag
airbag.enable()
frr_daemon = 'zebra'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
# This script only works with a passed VRF name
if len(argv) < 1:
raise NotImplementedError
vrf = argv[1]
# "assemble" dict - easier here then use a full blown get_config_dict()
# on a single leafNode
vni = { 'vrf' : vrf }
tmp = conf.return_value(['vrf', 'name', vrf, 'vni'])
if tmp: vni.update({ 'vni' : tmp })
return vni
def verify(vni):
return None
def generate(vni):
vni['new_frr_config'] = render_to_string('frr/vrf-vni.frr.tmpl', vni)
return None
def apply(vni):
# add configuration to FRR
frr_cfg = frr.FRRConfig()
frr_cfg.load_configuration(frr_daemon)
frr_cfg.modify_section(f'^vrf [a-zA-Z-]*$', '')
frr_cfg.add_before(r'(interface .*|line vty)', vni['new_frr_config'])
frr_cfg.commit_configuration(frr_daemon)
# Save configuration to /run/frr/config/frr.conf
frr.save_configuration()
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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