diff options
| -rwxr-xr-x | src/conf_mode/service_monitoring.py | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/conf_mode/service_monitoring.py b/src/conf_mode/service_monitoring.py new file mode 100755 index 000000000..e14ad78fc --- /dev/null +++ b/src/conf_mode/service_monitoring.py @@ -0,0 +1,143 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 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/>. + +import os +import json + +from sys import exit + +from vyos.config import Config +from vyos.template import render +from vyos.util import call +from vyos.util import chown +from vyos.util import cmd +from vyos import ConfigError +from vyos import airbag +airbag.enable() + + +cache_dir = '/run/telegraf/.cache' +config_telegraf = '/run/telegraf/vyos-telegraf.conf' +custom_scripts_dir = '/etc/telegraf/custom_scripts' +syslog_telegraf = '/etc/rsyslog.d/50-telegraf.conf' +systemd_telegraf_service = '/etc/systemd/system/vyos-telegraf.service' +systemd_telegraf_override_dir = '/etc/systemd/system/vyos-telegraf.service.d' +systemd_override = f'{systemd_telegraf_override_dir}/10-override.conf' + + +def get_nft_filter_chains(): + """ + Get nft chains for table filter + """ + nft = cmd('nft --json list table ip filter') + 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_config(config=None): + + if config: + conf = config + else: + conf = Config() + base = ['service', 'monitoring'] + monitoring = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, + no_tag_node_value_mangle=True) + + if monitoring: + # Set default value for bucket if not configured + if 'bucket' not in monitoring: + monitoring['bucket'] = cmd('cat /etc/hostname') + + # Get nftables chains + monitoring['nft_chains'] = get_nft_filter_chains() + monitoring['custom_scripts_dir'] = custom_scripts_dir + + return monitoring + +def verify(monitoring): + # bail out early - looks like removal from running config + if not monitoring: + return None + + if 'login' not in monitoring['authentication'] or 'token' not in monitoring['authentication']: + raise ConfigError(f'Authentication "login and token" are mandatory!') + + if 'url' not in monitoring: + raise ConfigError(f'Monitoring "url" is mandatory!') + + return None + +def generate(monitoring): + if not monitoring: + # Delete config file + if os.path.isfile(config_telegraf): + os.unlink(config_telegraf) + if os.path.isfile(systemd_override): + os.unlink(systemd_override) + if os.path.isfile(syslog_telegraf): + os.unlink(syslog_telegraf) + + + return None + + # Create telegraf cache dir + if not os.path.exists(cache_dir): + os.mkdir(cache_dir) + + chown(cache_dir, 'telegraf', 'vyattacfg') + + # Create systemd override dir + if not os.path.exists(systemd_telegraf_override_dir): + os.mkdir(systemd_telegraf_override_dir) + + # 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, 'monitoring/telegraf.tmpl', monitoring) + render(systemd_telegraf_service, 'monitoring/systemd_vyos_telegraf_service.tmpl', monitoring) + render(systemd_override, 'monitoring/override.conf.tmpl', monitoring, permission=0o640) + render(syslog_telegraf, 'monitoring/syslog_telegraf.tmpl', monitoring) + + return None + +def apply(monitoring): + # Reload systemd manager configuration + call('systemctl daemon-reload') + if monitoring: + call('systemctl restart vyos-telegraf.service') + else: + call('systemctl stop vyos-telegraf.service') + # Telegraf include custom rsyslog config changes + call('systemctl restart rsyslog') + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |