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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ#!/usr/bin/python3 # # Copyright (C) 2018 Canonical, Ltd. # Author: Mathieu Trudel-Lapierre # # 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 . '''netplan configuration manager''' import logging import os import shutil import sys import tempfile from typing import Optional from netplan import libnetplan class ConfigManager(object): def __init__(self, prefix="/", extra_files={}): self.prefix = prefix self.tempdir = tempfile.mkdtemp(prefix='netplan_') self.temp_etc = os.path.join(self.tempdir, "etc") self.temp_run = os.path.join(self.tempdir, "run") self.extra_files = extra_files self.new_interfaces = set() self.np_state: Optional[libnetplan.State] = None def __getattr__(self, attr): assert self.np_state is not None, "Must call parse() before accessing the config." return getattr(self.np_state, attr) @property def physical_interfaces(self): assert self.np_state is not None, "Must call parse() before accessing the config." interfaces = {} interfaces.update(self.np_state.ethernets) interfaces.update(self.np_state.modems) interfaces.update(self.np_state.wifis) return interfaces @property def virtual_interfaces(self): assert self.np_state is not None, "Must call parse() before accessing the config." interfaces = {} # what about ovs_ports? interfaces.update(self.np_state.bridges) interfaces.update(self.np_state.bonds) interfaces.update(self.np_state.tunnels) interfaces.update(self.np_state.vlans) interfaces.update(self.np_state.vrfs) return interfaces def parse(self, extra_config=None): """ Parse all our config files to return an object that describes the system's entire configuration, so that it can later be interrogated. Returns a libnetplan State wrapper """ # /run/netplan shadows /etc/netplan/, which shadows /lib/netplan parser = libnetplan.Parser() try: parser.load_yaml_hierarchy(rootdir=self.prefix) if extra_config: for f in extra_config: parser.load_yaml(f) self.np_state = libnetplan.State() self.np_state.import_parser_results(parser) except libnetplan.LibNetplanException as e: raise ConfigurationError(*e.args) self.np_state.dump_to_logs() return self.np_state def add(self, config_dict): for config_file in config_dict: self._copy_file(config_file, config_dict[config_file]) self.extra_files.update(config_dict) # Invalidate the current parsed state self.np_state = None def backup(self, backup_config_dir=True): if backup_config_dir: self._copy_tree(os.path.join(self.prefix, "etc/netplan"), os.path.join(self.temp_etc, "netplan")) self._copy_tree(os.path.join(self.prefix, "run/NetworkManager/system-connections"), os.path.join(self.temp_run, "NetworkManager", "system-connections"), missing_ok=True) self._copy_tree(os.path.join(self.prefix, "run/systemd/network"), os.path.join(self.temp_run, "systemd", "network"), missing_ok=True) def revert(self): try: for extra_file in dict(self.extra_files): os.unlink(self.extra_files[extra_file]) del self.extra_files[extra_file] temp_nm_path = "{}/NetworkManager/system-connections".format(self.temp_run) temp_networkd_path = "{}/systemd/network".format(self.temp_run) if os.path.exists(temp_nm_path): shutil.rmtree(os.path.join(self.prefix, "run/NetworkManager/system-connections")) self._copy_tree(temp_nm_path, os.path.join(self.prefix, "run/NetworkManager/system-connections")) if os.path.exists(temp_networkd_path): shutil.rmtree(os.path.join(self.prefix, "run/systemd/network")) self._copy_tree(temp_networkd_path, os.path.join(self.prefix, "run/systemd/network")) except Exception as e: # pragma: nocover (only relevant to filesystem failures) # If we reach here, we're in big trouble. We may have wiped out # file NM or networkd are using, and we most likely removed the # "new" config -- or at least our copy of it. # Given that we're in some halfway done revert; warn the user # aggressively and drop everything; leaving any remaining backups # around for the user to handle themselves. logging.error("Something really bad happened while reverting config: {}".format(e)) logging.error("You should verify the netplan YAML in /etc/netplan and probably run 'netplan apply' again.") sys.exit(-1) def cleanup(self): shutil.rmtree(self.tempdir) def __del__(self): try: self.cleanup() except FileNotFoundError: # If cleanup() was called before, there is nothing to delete pass def _copy_file(self, src, dst): shutil.copy(src, dst) def _copy_tree(self, src, dst, missing_ok=False): try: shutil.copytree(src, dst) except FileNotFoundError: if missing_ok: pass else: raise class ConfigurationError(Exception): """ Configuration could not be parsed or has otherwise failed to apply """ pass