#!/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 sys import exit from shutil import rmtree from vyos.config import Config from vyos.configdict import dict_merge from vyos.util import call from vyos.util import check_port_availability from vyos.util import is_listen_port_bind_service from vyos.pki import wrap_certificate from vyos.pki import wrap_private_key from vyos.template import render from vyos.xml import defaults from vyos import ConfigError from vyos import airbag airbag.enable() load_balancing_dir = '/run/haproxy' load_balancing_conf_file = f'{load_balancing_dir}/haproxy.cfg' systemd_service = 'haproxy.service' systemd_override = r'/run/systemd/system/haproxy.service.d/10-override.conf' def get_config(config=None): if config: conf = config else: conf = Config() base = ['load-balancing', 'reverse-proxy'] lb = conf.get_config_dict(base, get_first_key=True, key_mangling=('-', '_'), no_tag_node_value_mangle=True) if lb: lb['pki'] = conf.get_config_dict(['pki'], key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. default_values = defaults(base) if 'backend' in default_values: del default_values['backend'] if lb: lb = dict_merge(default_values, lb) if 'backend' in lb: for backend in lb['backend']: default_balues_backend = defaults(base + ['backend']) lb['backend'][backend] = dict_merge(default_balues_backend, lb['backend'][backend]) return lb def verify(lb): if not lb: return None if 'backend' not in lb or 'service' not in lb: raise ConfigError(f'"service" and "backend" must be configured!') for front, front_config in lb['service'].items(): if 'port' not in front_config: raise ConfigError(f'"{front} service port" must be configured!') # Check if bind address:port are used by another service tmp_address = front_config.get('address', '0.0.0.0') tmp_port = front_config['port'] if check_port_availability(tmp_address, int(tmp_port), 'tcp') is not True and \ not is_listen_port_bind_service(int(tmp_port), 'haproxy'): raise ConfigError(f'"TCP" port "{tmp_port}" is used by another service') for back, back_config in lb['backend'].items(): if 'server' not in back_config: raise ConfigError(f'"{back} server" must be configured!') for bk_server, bk_server_conf in back_config['server'].items(): if 'address' not in bk_server_conf or 'port' not in bk_server_conf: raise ConfigError(f'"backend {back} server {bk_server} address and port" must be configured!') if {'send_proxy', 'send_proxy_v2'} <= set(bk_server_conf): raise ConfigError(f'Cannot use both "send-proxy" and "send-proxy-v2" for server "{bk_server}"') def generate(lb): if not lb: # Delete /run/haproxy/haproxy.cfg config_files = [load_balancing_conf_file, systemd_override] for file in config_files: if os.path.isfile(file): os.unlink(file) # Delete old directories #if os.path.isdir(load_balancing_dir): # rmtree(load_balancing_dir, ignore_errors=True) return None # Create load-balance dir if not os.path.isdir(load_balancing_dir): os.mkdir(load_balancing_dir) # SSL Certificates for frontend for front, front_config in lb['service'].items(): if 'ssl' in front_config: cert_file_path = os.path.join(load_balancing_dir, 'cert.pem') cert_key_path = os.path.join(load_balancing_dir, 'cert.pem.key') ca_cert_file_path = os.path.join(load_balancing_dir, 'ca.pem') if 'certificate' in front_config['ssl']: #cert_file_path = os.path.join(load_balancing_dir, 'cert.pem') #cert_key_path = os.path.join(load_balancing_dir, 'cert.key') cert_name = front_config['ssl']['certificate'] pki_cert = lb['pki']['certificate'][cert_name] with open(cert_file_path, 'w') as f: f.write(wrap_certificate(pki_cert['certificate'])) if 'private' in pki_cert and 'key' in pki_cert['private']: with open(cert_key_path, 'w') as f: f.write(wrap_private_key(pki_cert['private']['key'])) if 'ca_certificate' in front_config['ssl']: ca_name = front_config['ssl']['ca_certificate'] pki_ca_cert = lb['pki']['ca'][ca_name] with open(ca_cert_file_path, 'w') as f: f.write(wrap_certificate(pki_ca_cert['certificate'])) # SSL Certificates for backend for back, back_config in lb['backend'].items(): if 'ssl' in back_config: ca_cert_file_path = os.path.join(load_balancing_dir, 'ca.pem') if 'ca_certificate' in back_config['ssl']: ca_name = back_config['ssl']['ca_certificate'] pki_ca_cert = lb['pki']['ca'][ca_name] with open(ca_cert_file_path, 'w') as f: f.write(wrap_certificate(pki_ca_cert['certificate'])) render(load_balancing_conf_file, 'load-balancing/haproxy.cfg.j2', lb) render(systemd_override, 'load-balancing/override_haproxy.conf.j2', lb) return None def apply(lb): call('systemctl daemon-reload') if not lb: call(f'systemctl stop {systemd_service}') else: call(f'systemctl reload-or-restart {systemd_service}') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)