#!/usr/bin/env python3 # # Copyright (C) 2021-2023 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 import socket import json from sys import exit from shutil import rmtree from vyos.config import Config from vyos.configdict import is_node_changed from vyos.configverify import verify_vrf from vyos.ifconfig import Section from vyos.template import render from vyos.utils.process import call from vyos.utils.permission import chown from vyos.utils.process import cmd from vyos import ConfigError from vyos import airbag airbag.enable() cache_dir = f'/etc/telegraf/.cache' config_telegraf = f'/run/telegraf/telegraf.conf' custom_scripts_dir = '/etc/telegraf/custom_scripts' syslog_telegraf = '/etc/rsyslog.d/50-telegraf.conf' systemd_override = '/run/systemd/system/telegraf.service.d/10-override.conf' def get_nft_filter_chains(): """ Get nft chains for table filter """ try: nft = cmd('nft --json list table ip vyos_filter') except Exception: print('nft table ip vyos_filter not found') return [] nft = json.loads(nft) chain_list = [] for output in nft['nftables']: if 'chain' in output: chain = output['chain']['name'] chain_list.append(chain) return chain_list def get_hostname() -> str: try: hostname = socket.getfqdn() except socket.gaierror: hostname = socket.gethostname() return hostname def get_config(config=None): if config: conf = config else: conf = Config() base = ['service', 'monitoring', 'telegraf'] if not conf.exists(base): return None monitoring = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) tmp = is_node_changed(conf, base + ['vrf']) if tmp: monitoring.update({'restart_required': {}}) # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. monitoring = conf.merge_defaults(monitoring, recursive=True) monitoring['custom_scripts_dir'] = custom_scripts_dir monitoring['hostname'] = get_hostname() monitoring['interfaces_ethernet'] = Section.interfaces('ethernet', vlan=False) monitoring['nft_chains'] = get_nft_filter_chains() # Redefine azure group-metrics 'single-table' and 'table-per-metric' if 'azure_data_explorer' in monitoring: if 'single-table' in monitoring['azure_data_explorer']['group_metrics']: monitoring['azure_data_explorer']['group_metrics'] = 'SingleTable' else: monitoring['azure_data_explorer']['group_metrics'] = 'TablePerMetric' # Set azure env if 'authentication' in monitoring['azure_data_explorer']: auth_config = monitoring['azure_data_explorer']['authentication'] if {'client_id', 'client_secret', 'tenant_id'} <= set(auth_config): os.environ['AZURE_CLIENT_ID'] = auth_config['client_id'] os.environ['AZURE_CLIENT_SECRET'] = auth_config['client_secret'] os.environ['AZURE_TENANT_ID'] = auth_config['tenant_id'] # Ignore default XML values if config doesn't exists # Delete key from dict if not conf.exists(base + ['influxdb']): del monitoring['influxdb'] if not conf.exists(base + ['prometheus-client']): del monitoring['prometheus_client'] if not conf.exists(base + ['azure-data-explorer']): del monitoring['azure_data_explorer'] return monitoring def verify(monitoring): # bail out early - looks like removal from running config if not monitoring: return None verify_vrf(monitoring) # Verify influxdb if 'influxdb' in monitoring: if 'authentication' not in monitoring['influxdb'] or \ 'organization' not in monitoring['influxdb']['authentication'] or \ 'token' not in monitoring['influxdb']['authentication']: raise ConfigError(f'influxdb authentication "organization and token" are mandatory!') if 'url' not in monitoring['influxdb']: raise ConfigError(f'Monitoring influxdb "url" is mandatory!') # Verify azure-data-explorer if 'azure_data_explorer' in monitoring: if 'authentication' not in monitoring['azure_data_explorer'] or \ 'client_id' not in monitoring['azure_data_explorer']['authentication'] or \ 'client_secret' not in monitoring['azure_data_explorer']['authentication'] or \ 'tenant_id' not in monitoring['azure_data_explorer']['authentication']: raise ConfigError(f'Authentication "client-id, client-secret and tenant-id" are mandatory!') if 'database' not in monitoring['azure_data_explorer']: raise ConfigError(f'Monitoring "database" is mandatory!') if 'url' not in monitoring['azure_data_explorer']: raise ConfigError(f'Monitoring "url" is mandatory!') if monitoring['azure_data_explorer']['group_metrics'] == 'SingleTable' and \ 'table' not in monitoring['azure_data_explorer']: raise ConfigError(f'Monitoring "table" name for single-table mode is mandatory!') # Verify Splunk if 'splunk' in monitoring: if 'authentication' not in monitoring['splunk'] or \ 'token' not in monitoring['splunk']['authentication']: raise ConfigError(f'Authentication "organization and token" are mandatory!') if 'url' not in monitoring['splunk']: raise ConfigError(f'Monitoring splunk "url" is mandatory!') return None def generate(monitoring): if not monitoring: # Delete config and systemd files config_files = [config_telegraf, systemd_override, syslog_telegraf] for file in config_files: if os.path.isfile(file): os.unlink(file) # Delete old directories if os.path.isdir(cache_dir): rmtree(cache_dir, ignore_errors=True) return None # Create telegraf cache dir if not os.path.exists(cache_dir): os.makedirs(cache_dir) chown(cache_dir, 'telegraf', 'telegraf') # Create custome scripts dir if not os.path.exists(custom_scripts_dir): os.mkdir(custom_scripts_dir) # Render telegraf configuration and systemd override render(config_telegraf, 'telegraf/telegraf.j2', monitoring, user='telegraf', group='telegraf') render(systemd_override, 'telegraf/override.conf.j2', monitoring) render(syslog_telegraf, 'telegraf/syslog_telegraf.j2', monitoring) return None def apply(monitoring): # Reload systemd manager configuration systemd_service = 'telegraf.service' call('systemctl daemon-reload') if not monitoring: call(f'systemctl stop {systemd_service}') return # we need to restart the service if e.g. the VRF name changed systemd_action = 'reload-or-restart' if 'restart_required' in monitoring: systemd_action = 'restart' call(f'systemctl {systemd_action} {systemd_service}') # Telegraf include custom rsyslog config changes call('systemctl reload-or-restart rsyslog') if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)