#!/usr/bin/env python3 # config.py - Utility functions for pvcnoded configuration parsing # Part of the Parallel Virtual Cluster (PVC) system # # Copyright (C) 2018-2024 Joshua M. Boniface # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, version 3. # # 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 . # ############################################################################### import os import subprocess import yaml from socket import gethostname from re import findall from psutil import cpu_count from ipaddress import ip_address, ip_network class MalformedConfigurationError(Exception): """ An except when parsing the PVC Node daemon configuration file """ def __init__(self, error=None): self.msg = f"ERROR: Configuration file is malformed: {error}" def __str__(self): return str(self.msg) def get_static_data(): """ Data that is obtained once at node startup for use later """ staticdata = list() staticdata.append(str(cpu_count())) # CPU count staticdata.append( subprocess.run(["uname", "-r"], stdout=subprocess.PIPE) .stdout.decode("ascii") .strip() ) staticdata.append( subprocess.run(["uname", "-o"], stdout=subprocess.PIPE) .stdout.decode("ascii") .strip() ) staticdata.append( subprocess.run(["uname", "-m"], stdout=subprocess.PIPE) .stdout.decode("ascii") .strip() ) return staticdata def get_configuration_path(): try: _config_file = os.environ["PVC_CONFIG_FILE"] if not os.path.exists(_config_file): raise config_file = _config_file except Exception: print('ERROR: The "PVC_CONFIG_FILE" environment variable must be set.') os._exit(1) return config_file def get_hostname(): node_fqdn = gethostname() node_hostname = node_fqdn.split(".", 1)[0] node_domain = "".join(node_fqdn.split(".", 1)[1:]) try: node_id = findall(r"\d+", node_hostname)[-1] except IndexError: node_id = 0 return node_fqdn, node_hostname, node_domain, node_id def validate_floating_ip(config, network): if network not in ["cluster", "storage", "upstream"]: return False, f'Specified network type "{network}" is not valid' floating_key = f"{network}_floating_ip" network_key = f"{network}_network" # Verify the network provided is valid try: network = ip_network(config[network_key]) except Exception: return ( False, f"Network address {config[network_key]} for {network_key} is not valid", ) # Verify that the floating IP is valid (and in the network) try: floating_address = ip_address(config[floating_key].split("/")[0]) if floating_address not in list(network.hosts()): raise except Exception: return ( False, f"Floating address {config[floating_key]} for {floating_key} is not valid", ) return True, "" def get_parsed_configuration(config_file): print('Loading configuration from file "{}"'.format(config_file)) with open(config_file, "r") as cfgfh: try: o_config = yaml.load(cfgfh, Loader=yaml.SafeLoader) except Exception as e: print(f"ERROR: Failed to parse configuration file: {e}") os._exit(1) config = dict() node_fqdn, node_hostname, node_domain, node_id = get_hostname() config_thisnode = { "node": node_hostname, "node_hostname": node_hostname, "node_fqdn": node_fqdn, "node_domain": node_domain, "node_id": node_id, } config = {**config, **config_thisnode} try: o_path = o_config["path"] config_path = { "plugin_directory": o_path.get( "plugin_directory", "/usr/share/pvc/plugins" ), "dynamic_directory": o_path["dynamic_directory"], "log_directory": o_path["system_log_directory"], "console_log_directory": o_path["console_log_directory"], "ceph_directory": o_path["ceph_directory"], } # Define our dynamic directory schema config_path["dnsmasq_dynamic_directory"] = ( config_path["dynamic_directory"] + "/dnsmasq" ) config_path["pdns_dynamic_directory"] = ( config_path["dynamic_directory"] + "/pdns" ) config_path["nft_dynamic_directory"] = config_path["dynamic_directory"] + "/nft" # Define our log directory schema config_path["dnsmasq_log_directory"] = config_path["log_directory"] + "/dnsmasq" config_path["pdns_log_directory"] = config_path["log_directory"] + "/pdns" config_path["nft_log_directory"] = config_path["log_directory"] + "/nft" config = {**config, **config_path} o_subsystem = o_config["subsystem"] config_subsystem = { "enable_hypervisor": o_subsystem.get("enable_hypervisor", True), "enable_networking": o_subsystem.get("enable_networking", True), "enable_storage": o_subsystem.get("enable_storage", True), "enable_worker": o_subsystem.get("enable_worker", True), "enable_api": o_subsystem.get("enable_api", True), "enable_prometheus": o_subsystem.get("enable_prometheus", True), } config = {**config, **config_subsystem} o_cluster = o_config["cluster"] config_cluster = { "cluster_name": o_cluster["name"], "all_nodes": o_cluster["all_nodes"], "coordinators": o_cluster["coordinator_nodes"], } config = {**config, **config_cluster} o_cluster_networks = o_cluster["networks"] for network_type in ["cluster", "storage", "upstream"]: o_cluster_networks_specific = o_cluster_networks[network_type] config_cluster_networks_specific = { f"{network_type}_domain": o_cluster_networks_specific["domain"], f"{network_type}_dev": o_cluster_networks_specific["device"], f"{network_type}_mtu": o_cluster_networks_specific["mtu"], f"{network_type}_network": o_cluster_networks_specific["ipv4"][ "network_address" ] + "/" + str(o_cluster_networks_specific["ipv4"]["netmask"]), f"{network_type}_floating_ip": o_cluster_networks_specific["ipv4"][ "floating_address" ] + "/" + str(o_cluster_networks_specific["ipv4"]["netmask"]), f"{network_type}_node_ip_selection": o_cluster_networks_specific[ "node_ip_selection" ], } if ( o_cluster_networks_specific["ipv4"].get("gateway_address", None) is not None ): config[f"{network_type}_gateway"] = o_cluster_networks_specific["ipv4"][ "gateway_address" ] result, msg = validate_floating_ip( config_cluster_networks_specific, network_type ) if not result: raise MalformedConfigurationError(msg) network = ip_network( config_cluster_networks_specific[f"{network_type}_network"] ) if ( config_cluster_networks_specific[f"{network_type}_node_ip_selection"] == "by-id" ): address_id = int(node_id) - 1 else: # This roundabout solution ensures the given IP is in the subnet and is something valid address_id = [ idx for idx, ip in enumerate(list(network.hosts())) if str(ip) == config_cluster_networks_specific[ f"{network_type}_node_ip_selection" ] ][0] config_cluster_networks_specific[f"{network_type}_dev_ip"] = ( f"{list(network.hosts())[address_id]}/{network.prefixlen}" ) config = {**config, **config_cluster_networks_specific} o_database = o_config["database"] config_database = { "zookeeper_port": o_database["zookeeper"]["port"], "keydb_port": o_database["keydb"]["port"], "keydb_host": o_database["keydb"]["hostname"], "keydb_path": o_database["keydb"]["path"], "api_postgresql_port": o_database["postgres"]["port"], "api_postgresql_host": o_database["postgres"]["hostname"], "api_postgresql_dbname": o_database["postgres"]["credentials"]["api"][ "database" ], "api_postgresql_user": o_database["postgres"]["credentials"]["api"][ "username" ], "api_postgresql_password": o_database["postgres"]["credentials"]["api"][ "password" ], "pdns_postgresql_port": o_database["postgres"]["port"], "pdns_postgresql_host": o_database["postgres"]["hostname"], "pdns_postgresql_dbname": o_database["postgres"]["credentials"]["dns"][ "database" ], "pdns_postgresql_user": o_database["postgres"]["credentials"]["dns"][ "username" ], "pdns_postgresql_password": o_database["postgres"]["credentials"]["dns"][ "password" ], } config = {**config, **config_database} o_timer = o_config["timer"] config_timer = { "vm_shutdown_timeout": int(o_timer.get("vm_shutdown_timeout", 180)), "keepalive_interval": int(o_timer.get("keepalive_interval", 5)), "monitoring_interval": int(o_timer.get("monitoring_interval", 15)), } config = {**config, **config_timer} o_fencing = o_config["fencing"] config_fencing = { "disable_on_ipmi_failure": o_fencing["disable_on_ipmi_failure"], "fence_intervals": int(o_fencing["intervals"].get("fence_intervals", 6)), "suicide_intervals": int(o_fencing["intervals"].get("suicide_interval", 0)), "successful_fence": o_fencing["actions"].get("successful_fence", None), "failed_fence": o_fencing["actions"].get("failed_fence", None), "ipmi_hostname": o_fencing["ipmi"]["hostname"].format(node_id=node_id), "ipmi_username": o_fencing["ipmi"]["username"], "ipmi_password": o_fencing["ipmi"]["password"], } config = {**config, **config_fencing} o_migration = o_config["migration"] config_migration = { "migration_target_selector": o_migration.get("target_selector", "mem"), } config = {**config, **config_migration} o_logging = o_config["logging"] config_logging = { "debug": o_logging.get("debug_logging", False), "file_logging": o_logging.get("file_logging", False), "stdout_logging": o_logging.get("stdout_logging", False), "zookeeper_logging": o_logging.get("zookeeper_logging", False), "log_colours": o_logging.get("log_colours", False), "log_dates": o_logging.get("log_dates", False), "log_keepalives": o_logging.get("log_keepalives", False), "log_keepalive_cluster_details": o_logging.get( "log_cluster_details", False ), "log_monitoring_details": o_logging.get("log_monitoring_details", False), "console_log_lines": o_logging.get("console_log_lines", False), "node_log_lines": o_logging.get("node_log_lines", False), } config = {**config, **config_logging} o_guest_networking = o_config["guest_networking"] config_guest_networking = { "bridge_dev": o_guest_networking["bridge_device"], "bridge_mtu": o_guest_networking["bridge_mtu"], "enable_sriov": o_guest_networking.get("sriov_enable", False), "sriov_device": o_guest_networking.get("sriov_device", list()), } config = {**config, **config_guest_networking} o_ceph = o_config["ceph"] config_ceph = { "ceph_config_file": config["ceph_directory"] + "/" + o_ceph["ceph_config_file"], "ceph_admin_keyring": config["ceph_directory"] + "/" + o_ceph["ceph_keyring_file"], "ceph_monitor_port": o_ceph["monitor_port"], "ceph_secret_uuid": o_ceph["secret_uuid"], "storage_hosts": o_ceph.get("monitor_hosts", None), } config = {**config, **config_ceph} o_api = o_config["api"] o_api_listen = o_api["listen"] config_api_listen = { "api_listen_address": o_api_listen["address"], "api_listen_port": o_api_listen["port"], } config = {**config, **config_api_listen} o_api_authentication = o_api["authentication"] config_api_authentication = { "api_auth_enabled": o_api_authentication.get("enabled", False), "api_auth_secret_key": o_api_authentication.get("secret_key", ""), "api_auth_source": o_api_authentication.get("source", "token"), } config = {**config, **config_api_authentication} o_api_ssl = o_api["ssl"] config_api_ssl = { "api_ssl_enabled": o_api_ssl.get("enabled", False), "api_ssl_cert_file": o_api_ssl.get("certificate", None), "api_ssl_key_file": o_api_ssl.get("private_key", None), } config = {**config, **config_api_ssl} # Use coordinators as storage hosts if not explicitly specified # These are added as FQDNs in the storage domain if not config["storage_hosts"] or len(config["storage_hosts"]) < 1: config["storage_hosts"] = [] for host in config["coordinators"]: config["storage_hosts"].append(f"{host}.{config['storage_domain']}") # Set up our token list if specified if config["api_auth_source"] == "token": config["api_auth_tokens"] = o_api["token"] else: if config["api_auth_enabled"]: print( "WARNING: No authentication method provided; disabling API authentication." ) config["api_auth_enabled"] = False # Add our node static data to the config config["static_data"] = get_static_data() except Exception as e: raise MalformedConfigurationError(e) return config def get_configuration(): """ Get the configuration. """ pvc_config_file = get_configuration_path() config = get_parsed_configuration(pvc_config_file) return config def get_parsed_autobackup_configuration(config_file): """ Load the configuration; this is the same main pvc.conf that the daemons read """ print('Loading configuration from file "{}"'.format(config_file)) with open(config_file, "r") as cfgfh: try: o_config = yaml.load(cfgfh, Loader=yaml.SafeLoader) except Exception as e: print(f"ERROR: Failed to parse configuration file: {e}") os._exit(1) config = dict() try: o_cluster = o_config["cluster"] config_cluster = { "cluster": o_cluster["name"], "autobackup_enabled": True, } config = {**config, **config_cluster} o_autobackup = o_config["autobackup"] if o_autobackup is None: config["autobackup_enabled"] = False return config config_autobackup = { "backup_root_path": o_autobackup["backup_root_path"], "backup_root_suffix": o_autobackup["backup_root_suffix"], "backup_tags": o_autobackup["backup_tags"], "backup_schedule": o_autobackup["backup_schedule"], } config = {**config, **config_autobackup} o_automount = o_autobackup["auto_mount"] config_automount = { "auto_mount_enabled": o_automount["enabled"], } config = {**config, **config_automount} if config["auto_mount_enabled"]: config["mount_cmds"] = list() for _mount_cmd in o_automount["mount_cmds"]: if "{backup_root_path}" in _mount_cmd: _mount_cmd = _mount_cmd.format( backup_root_path=config["backup_root_path"] ) config["mount_cmds"].append(_mount_cmd) config["unmount_cmds"] = list() for _unmount_cmd in o_automount["unmount_cmds"]: if "{backup_root_path}" in _unmount_cmd: _unmount_cmd = _unmount_cmd.format( backup_root_path=config["backup_root_path"] ) config["unmount_cmds"].append(_unmount_cmd) except Exception as e: raise MalformedConfigurationError(e) return config def get_autobackup_configuration(): """ Get the configuration. """ pvc_config_file = get_configuration_path() config = get_parsed_autobackup_configuration(pvc_config_file) return config def validate_directories(config): if not os.path.exists(config["dynamic_directory"]): os.makedirs(config["dynamic_directory"]) os.makedirs(config["dnsmasq_dynamic_directory"]) os.makedirs(config["pdns_dynamic_directory"]) os.makedirs(config["nft_dynamic_directory"]) if not os.path.exists(config["log_directory"]): os.makedirs(config["log_directory"]) os.makedirs(config["dnsmasq_log_directory"]) os.makedirs(config["pdns_log_directory"]) os.makedirs(config["nft_log_directory"])