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service_config-sync.py
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service_config-sync.py
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#!/usr/bin/env python3
#
# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
#
# 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
import json
from pathlib import Path
from vyos.config import Config
from vyos import ConfigError
from vyos import airbag
airbag.enable()
service_conf = Path(f'/run/config_sync_conf.conf')
post_commit_dir = '/run/scripts/commit/post-hooks.d'
post_commit_file_src = '/usr/libexec/vyos/vyos_config_sync.py'
post_commit_file = f'{post_commit_dir}/vyos_config_sync'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'config-sync']
if not conf.exists(base):
return None
config = conf.get_config_dict(base, get_first_key=True,
with_recursive_defaults=True)
return config
def verify(config):
# bail out early - looks like removal from running config
if not config:
return None
if 'mode' not in config:
raise ConfigError(f'config-sync mode is mandatory!')
for option in ['secondary', 'section']:
if option not in config:
raise ConfigError(f"config-sync '{option}' is not configured!")
if 'address' not in config['secondary']:
raise ConfigError(f'secondary address is mandatory!')
if 'key' not in config['secondary']:
raise ConfigError(f'secondary key is mandatory!')
def generate(config):
if not config:
if os.path.exists(post_commit_file):
os.unlink(post_commit_file)
if service_conf.exists():
service_conf.unlink()
return None
# Write configuration file
conf_json = json.dumps(config, indent=4)
service_conf.write_text(conf_json)
# Create post commit dir
if not os.path.isdir(post_commit_dir):
os.makedirs(post_commit_dir)
# Symlink from helpers to post-commit
if not os.path.exists(post_commit_file):
os.symlink(post_commit_file_src, post_commit_file)
return None
def apply(config):
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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