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#!/usr/bin/env python3
#
# 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
# 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 vyos.config import Config
from vyos.template import render
from vyos.utils.dict import dict_search
from vyos.utils.file import write_file
from vyos.utils.process import call
from vyos import ConfigError
from vyos import airbag
airbag.enable()
service_name = 'zabbix-agent2'
service_conf = f'/run/zabbix/{service_name}.conf'
service_psk_file = f'/run/zabbix/{service_name}.psk'
systemd_override = r'/run/systemd/system/zabbix-agent2.service.d/10-override.conf'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'monitoring', 'zabbix-agent']
if not conf.exists(base):
return None
config = conf.get_config_dict(base, key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
with_recursive_defaults=True)
# Cut the / from the end, /tmp/ => /tmp
if 'directory' in config and config['directory'].endswith('/'):
config['directory'] = config['directory'][:-1]
config['service_psk_file'] = service_psk_file
return config
def verify(config):
# bail out early - looks like removal from running config
if config is None:
return
if 'server' not in config:
raise ConfigError('Server is required!')
if 'authentication' in config and dict_search("authentication.mode",
config) == 'pre_shared_secret':
if 'id' not in config['authentication']['psk']:
raise ConfigError(
'PSK identity is required for pre-shared-secret authentication mode')
if 'secret' not in config['authentication']['psk']:
raise ConfigError(
'PSK secret is required for pre-shared-secret authentication mode')
def generate(config):
# bail out early - looks like removal from running config
if config is None:
# Remove old config and return
config_files = [service_conf, systemd_override, service_psk_file]
for file in config_files:
if os.path.isfile(file):
os.unlink(file)
return None
if not dict_search("authentication.psk.secret", config):
if os.path.isfile(service_psk_file):
os.unlink(service_psk_file)
else:
write_file(service_psk_file, config["authentication"]["psk"]["secret"])
# Write configuration file
render(service_conf, 'zabbix-agent/zabbix-agent.conf.j2', config)
render(systemd_override, 'zabbix-agent/10-override.conf.j2', config)
return None
def apply(config):
call('systemctl daemon-reload')
if config:
call(f'systemctl restart {service_name}.service')
else:
call(f'systemctl stop {service_name}.service')
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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