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# Copyright (C) 2012 Canonical Ltd. # Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # # This file is part of cloud-init. See LICENSE file for license information. import copy import json import logging import os import sys from collections import namedtuple from contextlib import suppress from typing import Dict, Iterable, List, Optional, Set from cloudinit import ( atomic_helper, cloud, distros, features, handlers, helpers, importer, net, sources, type_utils, util, ) from cloudinit.event import EventScope, EventType, userdata_to_events # Default handlers (used if not overridden) from cloudinit.handlers.boot_hook import BootHookPartHandler from cloudinit.handlers.cloud_config import CloudConfigPartHandler from cloudinit.handlers.jinja_template import JinjaTemplatePartHandler from cloudinit.handlers.shell_script import ShellScriptPartHandler from cloudinit.handlers.shell_script_by_frequency import ( ShellScriptByFreqPartHandler, ) from cloudinit.net import cmdline from cloudinit.reporting import events from cloudinit.settings import ( CLOUD_CONFIG, PER_ALWAYS, PER_INSTANCE, PER_ONCE, RUN_CLOUD_CONFIG, ) from cloudinit.sources import NetworkConfigSource LOG = logging.getLogger(__name__) NO_PREVIOUS_INSTANCE_ID = "NO_PREVIOUS_INSTANCE_ID" COMBINED_CLOUD_CONFIG_DOC = ( "Aggregated cloud-config created by merging merged_system_cfg" " (/etc/cloud/cloud.cfg and /etc/cloud/cloud.cfg.d), metadata," " vendordata and userdata. The combined_cloud_config represents" " the aggregated desired configuration acted upon by cloud-init." ) def update_event_enabled( datasource: sources.DataSource, cfg: dict, event_source_type: EventType, scope: EventScope, ) -> bool: """Determine if a particular EventType is enabled. For the `event_source_type` passed in, check whether this EventType is enabled in the `updates` section of the userdata. If `updates` is not enabled in userdata, check if defined as one of the `default_events` on the datasource. `scope` may be used to narrow the check to a particular `EventScope`. Note that on first boot, userdata may NOT be available yet. In this case, we only have the data source's `default_update_events`, so an event that should be enabled in userdata may be denied. """ default_events: Dict[ EventScope, Set[EventType] ] = datasource.default_update_events user_events: Dict[EventScope, Set[EventType]] = userdata_to_events( cfg.get("updates", {}) ) # A value in the first will override a value in the second allowed = util.mergemanydict( [ copy.deepcopy(user_events), copy.deepcopy(default_events), ] ) # Add supplemental hotplug event if supported and present in # hotplug.enabled file if EventType.HOTPLUG in datasource.supported_update_events.get( scope, set() ): hotplug_enabled_file = util.read_hotplug_enabled_file(datasource.paths) if scope.value in hotplug_enabled_file["scopes"]: LOG.debug( "Adding event: scope=%s EventType=%s found in %s", scope, EventType.HOTPLUG, datasource.paths.get_cpath("hotplug.enabled"), ) if not allowed.get(scope): allowed[scope] = set() allowed[scope].add(EventType.HOTPLUG) LOG.debug("Allowed events: %s", allowed) scopes: Iterable[EventScope] = [scope] scope_values = [s.value for s in scopes] for evt_scope in scopes: if event_source_type in allowed.get(evt_scope, []): LOG.debug( "Event Allowed: scope=%s EventType=%s", evt_scope.value, event_source_type, ) return True LOG.debug( "Event Denied: scopes=%s EventType=%s", scope_values, event_source_type ) return False class Init: def __init__(self, ds_deps: Optional[List[str]] = None, reporter=None): if ds_deps is not None: self.ds_deps = ds_deps else: self.ds_deps = [sources.DEP_FILESYSTEM, sources.DEP_NETWORK] # Created on first use self._cfg: Dict = {} self._paths: Optional[helpers.Paths] = None self._distro: Optional[distros.Distro] = None # Changed only when a fetch occurs self.datasource: Optional[sources.DataSource] = None self.ds_restored = False self._previous_iid = None if reporter is None: reporter = events.ReportEventStack( name="init-reporter", description="init-desc", reporting_enabled=False, ) self.reporter = reporter def _reset(self): # Recreated on access self._cfg = {} self._paths = None self._distro = None @property def distro(self): if not self._distro: # Try to find the right class to use system_config = self._extract_cfg("system") distro_name = system_config.pop("distro", "ubuntu") distro_cls = distros.fetch(distro_name) LOG.debug("Using distro class %s", distro_cls) self._distro = distro_cls(distro_name, system_config, self.paths) # If we have an active datasource we need to adjust # said datasource and move its distro/system config # from whatever it was to a new set... if self.datasource is not None: self.datasource.distro = self._distro self.datasource.sys_cfg = self.cfg return self._distro @property def cfg(self): return self._extract_cfg("restricted") def _extract_cfg(self, restriction): # Ensure actually read self.read_cfg() # Nobody gets the real config ocfg = copy.deepcopy(self._cfg) if restriction == "restricted": ocfg.pop("system_info", None) elif restriction == "system": ocfg = util.get_cfg_by_path(ocfg, ("system_info",), {}) elif restriction == "paths": ocfg = util.get_cfg_by_path(ocfg, ("system_info", "paths"), {}) return ocfg @property def paths(self): if not self._paths: path_info = self._extract_cfg("paths") self._paths = helpers.Paths(path_info, self.datasource) return self._paths def _initial_subdirs(self): c_dir = self.paths.cloud_dir run_dir = self.paths.run_dir initial_dirs = [ c_dir, os.path.join(c_dir, "scripts"), os.path.join(c_dir, "scripts", "per-instance"), os.path.join(c_dir, "scripts", "per-once"), os.path.join(c_dir, "scripts", "per-boot"), os.path.join(c_dir, "scripts", "vendor"), os.path.join(c_dir, "seed"), os.path.join(c_dir, "instances"), os.path.join(c_dir, "handlers"), os.path.join(c_dir, "sem"), os.path.join(c_dir, "data"), os.path.join(run_dir, "sem"), ] return initial_dirs def purge_cache(self, rm_instance_lnk=False): rm_list = [self.paths.boot_finished] if rm_instance_lnk: rm_list.append(self.paths.instance_link) for f in rm_list: util.del_file(f) return len(rm_list) def initialize(self): self._initialize_filesystem() @staticmethod def _get_strictest_mode(mode_1: int, mode_2: int) -> int: return mode_1 & mode_2 def _initialize_filesystem(self): mode = 0o640 util.ensure_dirs(self._initial_subdirs()) log_file = util.get_cfg_option_str(self.cfg, "def_log_file") if log_file: # At this point the log file should have already been created # in the setupLogging function of log.py with suppress(OSError): mode = self._get_strictest_mode( 0o640, util.get_permissions(log_file) ) # set file mode to the strictest of 0o640 and the current mode util.ensure_file(log_file, mode, preserve_mode=False) perms = self.cfg.get("syslog_fix_perms") if not perms: perms = {} if not isinstance(perms, list): perms = [perms] error = None for perm in perms: u, g = util.extract_usergroup(perm) try: util.chownbyname(log_file, u, g) return except OSError as e: error = e LOG.warning( "Failed changing perms on '%s'. tried: %s. %s", log_file, ",".join(perms), error, ) def read_cfg(self, extra_fns=None): if not self._cfg: self._cfg = self._read_cfg(extra_fns) def _read_cfg(self, extra_fns): no_cfg_paths = helpers.Paths({}, self.datasource) instance_data_file = no_cfg_paths.get_runpath( "instance_data_sensitive" ) merger = helpers.ConfigMerger( paths=no_cfg_paths, datasource=self.datasource, additional_fns=extra_fns, base_cfg=fetch_base_config(instance_data_file=instance_data_file), ) return merger.cfg def _restore_from_cache(self): # We try to restore from a current link and static path # by using the instance link, if purge_cache was called # the file wont exist. return sources.pkl_load(self.paths.get_ipath_cur("obj_pkl")) def _write_to_cache(self): if self.datasource is None: return False if util.get_cfg_option_bool(self.cfg, "manual_cache_clean", False): # The empty file in instance/ dir indicates manual cleaning, # and can be read by ds-identify. util.write_file( self.paths.get_ipath_cur("manual_clean_marker"), omode="w", content="", ) return sources.pkl_store( self.datasource, self.paths.get_ipath_cur("obj_pkl") ) def _get_datasources(self): # Any config provided??? pkg_list = self.cfg.get("datasource_pkg_list") or [] # Add the defaults at the end for n in ["", type_utils.obj_name(sources)]: if n not in pkg_list: pkg_list.append(n) cfg_list = self.cfg.get("datasource_list") or [] return (cfg_list, pkg_list) def _restore_from_checked_cache(self, existing): if existing not in ("check", "trust"): raise ValueError("Unexpected value for existing: %s" % existing) ds = self._restore_from_cache() if not ds: return (None, "no cache found") run_iid_fn = self.paths.get_runpath("instance_id") if os.path.exists(run_iid_fn): run_iid = util.load_text_file(run_iid_fn).strip() else: run_iid = None if run_iid == ds.get_instance_id(): return (ds, "restored from cache with run check: %s" % ds) elif existing == "trust": return (ds, "restored from cache: %s" % ds) else: if hasattr(ds, "check_instance_id") and ds.check_instance_id( self.cfg ): return (ds, "restored from checked cache: %s" % ds) else: return (None, "cache invalid in datasource: %s" % ds) def _get_data_source(self, existing) -> sources.DataSource: if self.datasource is not None: return self.datasource with events.ReportEventStack( name="check-cache", description="attempting to read from cache [%s]" % existing, parent=self.reporter, ) as myrep: ds, desc = self._restore_from_checked_cache(existing) myrep.description = desc self.ds_restored = bool(ds) LOG.debug(myrep.description) if not ds: util.del_file(self.paths.instance_link) (cfg_list, pkg_list) = self._get_datasources() # Deep copy so that user-data handlers can not modify # (which will affect user-data handlers down the line...) (ds, dsname) = sources.find_source( self.cfg, self.distro, self.paths, copy.deepcopy(self.ds_deps), cfg_list, pkg_list, self.reporter, ) LOG.info("Loaded datasource %s - %s", dsname, ds) self.datasource = ds # Ensure we adjust our path members datasource # now that we have one (thus allowing ipath to be used) self._reset() return ds def _get_instance_subdirs(self): return ["handlers", "scripts", "sem"] def _get_ipath(self, subname=None): # Force a check to see if anything # actually comes back, if not # then a datasource has not been assigned... instance_dir = self.paths.get_ipath(subname) if not instance_dir: raise RuntimeError( "No instance directory is available." " Has a datasource been fetched??" ) return instance_dir def _write_network_config_json(self, netcfg: dict): """Create /var/lib/cloud/instance/network-config.json Only attempt once /var/lib/cloud/instance exists which is created by Init.instancify once a datasource is detected. """ if not os.path.islink(self.paths.instance_link): # Datasource hasn't been detected yet, so we may not # have visibility to datasource applicable network-config return ncfg_instance_path = self.paths.get_ipath_cur("network_config") network_link = self.paths.get_runpath("network_config") if os.path.exists(ncfg_instance_path): # Compare and only write on delta of current network-config if netcfg != util.load_json( util.load_text_file(ncfg_instance_path) ): atomic_helper.write_json( ncfg_instance_path, netcfg, mode=0o600 ) else: atomic_helper.write_json(ncfg_instance_path, netcfg, mode=0o600) if not os.path.islink(network_link): util.sym_link(ncfg_instance_path, network_link) def _reflect_cur_instance(self): # Remove the old symlink and attach a new one so # that further reads/writes connect into the right location idir = self._get_ipath() util.del_file(self.paths.instance_link) util.sym_link(idir, self.paths.instance_link) # Ensures these dirs exist dir_list = [] for d in self._get_instance_subdirs(): dir_list.append(os.path.join(idir, d)) util.ensure_dirs(dir_list) # Write out information on what is being used for the current instance # and what may have been used for a previous instance... dp = self.paths.get_cpath("data") # Write what the datasource was and is.. ds = "%s: %s" % (type_utils.obj_name(self.datasource), self.datasource) previous_ds = None ds_fn = os.path.join(idir, "datasource") try: previous_ds = util.load_text_file(ds_fn).strip() except Exception: pass if not previous_ds: previous_ds = ds util.write_file(ds_fn, "%s\n" % ds) util.write_file( os.path.join(dp, "previous-datasource"), "%s\n" % (previous_ds) ) # What the instance id was and is... iid = self.datasource.get_instance_id() iid_fn = os.path.join(dp, "instance-id") previous_iid = self.previous_iid() util.write_file(iid_fn, "%s\n" % iid) util.write_file(self.paths.get_runpath("instance_id"), "%s\n" % iid) util.write_file( os.path.join(dp, "previous-instance-id"), "%s\n" % (previous_iid) ) self._write_to_cache() # Ensure needed components are regenerated # after change of instance which may cause # change of configuration self._reset() return iid def previous_iid(self): if self._previous_iid is not None: return self._previous_iid dp = self.paths.get_cpath("data") iid_fn = os.path.join(dp, "instance-id") try: self._previous_iid = util.load_text_file(iid_fn).strip() except Exception: self._previous_iid = NO_PREVIOUS_INSTANCE_ID LOG.debug("previous iid found to be %s", self._previous_iid) return self._previous_iid def is_new_instance(self): """Return true if this is a new instance. If datasource has already been initialized, this will return False, even on first boot. """ previous = self.previous_iid() ret = ( previous == NO_PREVIOUS_INSTANCE_ID or previous != self.datasource.get_instance_id() ) return ret def fetch(self, existing="check"): return self._get_data_source(existing=existing) def instancify(self): return self._reflect_cur_instance() def cloudify(self): # Form the needed options to cloudify our members return cloud.Cloud( self.datasource, self.paths, self.cfg, self.distro, helpers.Runners(self.paths), reporter=self.reporter, ) def update(self): self._store_rawdata(self.datasource.get_userdata_raw(), "userdata") self._store_processeddata(self.datasource.get_userdata(), "userdata") self._store_raw_vendordata( self.datasource.get_vendordata_raw(), "vendordata" ) self._store_processeddata( self.datasource.get_vendordata(), "vendordata" ) self._store_raw_vendordata( self.datasource.get_vendordata2_raw(), "vendordata2" ) self._store_processeddata( self.datasource.get_vendordata2(), "vendordata2" ) def setup_datasource(self): with events.ReportEventStack( "setup-datasource", "setting up datasource", parent=self.reporter ): if self.datasource is None: raise RuntimeError("Datasource is None, cannot setup.") self.datasource.setup(is_new_instance=self.is_new_instance()) def activate_datasource(self): with events.ReportEventStack( "activate-datasource", "activating datasource", parent=self.reporter, ): if self.datasource is None: raise RuntimeError("Datasource is None, cannot activate.") self.datasource.activate( cfg=self.cfg, is_new_instance=self.is_new_instance() ) self._write_to_cache() def _store_rawdata(self, data, datasource): # Raw data is bytes, not a string if data is None: data = b"" util.write_file(self._get_ipath("%s_raw" % datasource), data, 0o600) def _store_raw_vendordata(self, data, datasource): # Only these data types if data is not None and type(data) not in [bytes, str, list]: raise TypeError( "vendordata_raw is unsupported type '%s'" % str(type(data)) ) # This data may be a list, convert it to a string if so if isinstance(data, list): data = atomic_helper.json_dumps(data) self._store_rawdata(data, datasource) def _store_processeddata(self, processed_data, datasource): # processed is a Mime message, so write as string. if processed_data is None: processed_data = "" util.write_file( self._get_ipath(datasource), str(processed_data), 0o600 ) def _default_handlers(self, opts=None) -> List[handlers.Handler]: if opts is None: opts = {} opts.update( { "paths": self.paths, "datasource": self.datasource, } ) # TODO(harlowja) Hmmm, should we dynamically import these?? cloudconfig_handler = CloudConfigPartHandler(**opts) shellscript_handler = ShellScriptPartHandler(**opts) def_handlers = [ cloudconfig_handler, shellscript_handler, ShellScriptByFreqPartHandler(PER_ALWAYS, **opts), ShellScriptByFreqPartHandler(PER_INSTANCE, **opts), ShellScriptByFreqPartHandler(PER_ONCE, **opts), BootHookPartHandler(**opts), JinjaTemplatePartHandler( **opts, sub_handlers=[cloudconfig_handler, shellscript_handler] ), ] return def_handlers def _default_vendordata_handlers(self): return self._default_handlers( opts={ "script_path": "vendor_scripts", "cloud_config_path": "vendor_cloud_config", } ) def _default_vendordata2_handlers(self): return self._default_handlers( opts={ "script_path": "vendor_scripts", "cloud_config_path": "vendor2_cloud_config", } ) def _do_handlers( self, data_msg, c_handlers_list, frequency, excluded=None ): """ Generalized handlers suitable for use with either vendordata or userdata """ if excluded is None: excluded = [] cdir = self.paths.get_cpath("handlers") idir = self._get_ipath("handlers") # Add the path to the plugins dir to the top of our list for importing # new handlers. # # Note(harlowja): instance dir should be read before cloud-dir for d in [cdir, idir]: if d and d not in sys.path: sys.path.insert(0, d) def register_handlers_in_dir(path): # Attempts to register any handler modules under the given path. if not path or not os.path.isdir(path): return potential_handlers = util.get_modules_from_dir(path) for fname, mod_name in potential_handlers.items(): try: mod_locs, looked_locs = importer.find_module( mod_name, [""], ["list_types", "handle_part"] ) if not mod_locs: LOG.warning( "Could not find a valid user-data handler" " named %s in file %s (searched %s)", mod_name, fname, looked_locs, ) continue mod = importer.import_module(mod_locs[0]) mod = handlers.fixup_handler(mod) types = c_handlers.register(mod) if types: LOG.debug( "Added custom handler for %s [%s] from %s", types, mod, fname, ) except Exception: util.logexc( LOG, "Failed to register handler from %s", fname ) # This keeps track of all the active handlers c_handlers = helpers.ContentHandlers() # Add any handlers in the cloud-dir register_handlers_in_dir(cdir) # Register any other handlers that come from the default set. This # is done after the cloud-dir handlers so that the cdir modules can # take over the default user-data handler content-types. for mod in c_handlers_list: types = c_handlers.register(mod, overwrite=False) if types: LOG.debug("Added default handler for %s from %s", types, mod) # Form our cloud interface data = self.cloudify() def init_handlers(): # Init the handlers first for _ctype, mod in c_handlers.items(): if mod in c_handlers.initialized: # Avoid initiating the same module twice (if said module # is registered to more than one content-type). continue handlers.call_begin(mod, data, frequency) c_handlers.initialized.append(mod) def walk_handlers(excluded): # Walk the user data part_data = { "handlers": c_handlers, # Any new handlers that are encountered get written here "handlerdir": idir, "data": data, # The default frequency if handlers don't have one "frequency": frequency, # This will be used when new handlers are found # to help write their contents to files with numbered # names... "handlercount": 0, "excluded": excluded, } handlers.walk(data_msg, handlers.walker_callback, data=part_data) def finalize_handlers(): # Give callbacks opportunity to finalize for _ctype, mod in c_handlers.items(): if mod not in c_handlers.initialized: # Said module was never inited in the first place, so lets # not attempt to finalize those that never got called. continue c_handlers.initialized.remove(mod) try: handlers.call_end(mod, data, frequency) except Exception: util.logexc(LOG, "Failed to finalize handler: %s", mod) try: init_handlers() walk_handlers(excluded) finally: finalize_handlers() def consume_data(self, frequency=PER_INSTANCE): # Consume the userdata first, because we need want to let the part # handlers run first (for merging stuff) with events.ReportEventStack( "consume-user-data", "reading and applying user-data", parent=self.reporter, ): if util.get_cfg_option_bool(self.cfg, "allow_userdata", True): self._consume_userdata(frequency) else: LOG.debug("allow_userdata = False: discarding user-data") with events.ReportEventStack( "consume-vendor-data", "reading and applying vendor-data", parent=self.reporter, ): self._consume_vendordata("vendordata", frequency) with events.ReportEventStack( "consume-vendor-data2", "reading and applying vendor-data2", parent=self.reporter, ): self._consume_vendordata("vendordata2", frequency) # Perform post-consumption adjustments so that # modules that run during the init stage reflect # this consumed set. # # They will be recreated on future access... self._reset() # Note(harlowja): the 'active' datasource will have # references to the previous config, distro, paths # objects before the load of the userdata happened, # this is expected. combined_cloud_cfg = copy.deepcopy(self.cfg) combined_cloud_cfg["_doc"] = COMBINED_CLOUD_CONFIG_DOC # Persist system_info key from /etc/cloud/cloud.cfg in both # combined_cloud_config file and instance-data-sensitive.json's # merged_system_cfg key. combined_cloud_cfg["system_info"] = self._extract_cfg("system") # Add features information to allow for file-based discovery of # feature settings. combined_cloud_cfg["features"] = features.get_features() atomic_helper.write_json( self.paths.get_runpath("combined_cloud_config"), combined_cloud_cfg, mode=0o600, ) json_sensitive_file = self.paths.get_runpath("instance_data_sensitive") try: instance_json = util.load_json( util.load_text_file(json_sensitive_file) ) except (OSError, IOError) as e: LOG.warning( "Skipping write of system_info/features to %s." " Unable to read file: %s", json_sensitive_file, e, ) return except (json.JSONDecodeError, TypeError) as e: LOG.warning( "Skipping write of system_info/features to %s." " Invalid JSON found: %s", json_sensitive_file, e, ) return instance_json["system_info"] = combined_cloud_cfg["system_info"] instance_json["features"] = combined_cloud_cfg["features"] atomic_helper.write_json( json_sensitive_file, instance_json, mode=0o600, ) def _consume_vendordata(self, vendor_source, frequency=PER_INSTANCE): """ Consume the vendordata and run the part handlers on it """ # User-data should have been consumed first. # So we merge the other available cloud-configs (everything except # vendor provided), and check whether or not we should consume # vendor data at all. That gives user or system a chance to override. if vendor_source == "vendordata": if not self.datasource.get_vendordata_raw(): LOG.debug("no vendordata from datasource") return cfg_name = "vendor_data" elif vendor_source == "vendordata2": if not self.datasource.get_vendordata2_raw(): LOG.debug("no vendordata2 from datasource") return cfg_name = "vendor_data2" else: raise RuntimeError( "vendor_source arg must be either 'vendordata'" " or 'vendordata2'" ) _cc_merger = helpers.ConfigMerger( paths=self._paths, datasource=self.datasource, additional_fns=[], base_cfg=self.cfg, include_vendor=False, ) vdcfg = _cc_merger.cfg.get(cfg_name, {}) if not isinstance(vdcfg, dict): vdcfg = {"enabled": False} LOG.warning( "invalid %s setting. resetting to: %s", cfg_name, vdcfg ) enabled = vdcfg.get("enabled") no_handlers = vdcfg.get("disabled_handlers", None) if not util.is_true(enabled): LOG.debug("%s consumption is disabled.", vendor_source) return if isinstance(enabled, str): util.deprecate( deprecated=f"Use of string '{enabled}' for " "'vendor_data:enabled' field", deprecated_version="23.1", extra_message="Use boolean value instead.", ) LOG.debug( "%s will be consumed. disabled_handlers=%s", vendor_source, no_handlers, ) # Ensure vendordata source fetched before activation (just in case.) # c_handlers_list keeps track of all the active handlers, while # excluding what the users doesn't want run, i.e. boot_hook, # cloud_config, shell_script if vendor_source == "vendordata": vendor_data_msg = self.datasource.get_vendordata() c_handlers_list = self._default_vendordata_handlers() else: vendor_data_msg = self.datasource.get_vendordata2() c_handlers_list = self._default_vendordata2_handlers() # Run the handlers self._do_handlers( vendor_data_msg, c_handlers_list, frequency, excluded=no_handlers ) def _consume_userdata(self, frequency=PER_INSTANCE): """ Consume the userdata and run the part handlers """ # Ensure datasource fetched before activation (just incase) user_data_msg = self.datasource.get_userdata(True) # This keeps track of all the active handlers c_handlers_list = self._default_handlers() # Run the handlers self._do_handlers(user_data_msg, c_handlers_list, frequency) def _get_network_key_contents(self, cfg) -> dict: """ Network configuration can be passed as a dict under a "network" key, or optionally at the top level. In both cases, return the config. """ if cfg and "network" in cfg: return cfg["network"] return cfg def _find_networking_config(self): disable_file = os.path.join( self.paths.get_cpath("data"), "upgraded-network" ) if os.path.exists(disable_file): return (None, disable_file) available_cfgs = { NetworkConfigSource.CMD_LINE: cmdline.read_kernel_cmdline_config(), NetworkConfigSource.INITRAMFS: cmdline.read_initramfs_config(), NetworkConfigSource.DS: None, NetworkConfigSource.SYSTEM_CFG: self.cfg.get("network"), } if self.datasource and hasattr(self.datasource, "network_config"): available_cfgs[ NetworkConfigSource.DS ] = self.datasource.network_config if self.datasource: order = self.datasource.network_config_sources else: order = sources.DataSource.network_config_sources for cfg_source in order: if not isinstance(cfg_source, NetworkConfigSource): LOG.warning( "data source specifies an invalid network cfg_source: %s", cfg_source, ) continue if cfg_source not in available_cfgs: LOG.warning( "data source specifies an unavailable network" " cfg_source: %s", cfg_source, ) continue ncfg = self._get_network_key_contents(available_cfgs[cfg_source]) if net.is_disabled_cfg(ncfg): LOG.debug("network config disabled by %s", cfg_source) return (None, cfg_source) if ncfg: return (ncfg, cfg_source) if not self.cfg.get("network", True): LOG.warning("Empty network config found") return ( self.distro.generate_fallback_config(), NetworkConfigSource.FALLBACK, ) def _apply_netcfg_names(self, netcfg): try: LOG.debug("applying net config names for %s", netcfg) self.distro.networking.apply_network_config_names(netcfg) except Exception as e: LOG.warning("Failed to rename devices: %s", e) def _get_per_boot_network_semaphore(self): return namedtuple("Semaphore", "semaphore args")( helpers.FileSemaphores(self.paths.get_runpath("sem")), ("apply_network_config", PER_ONCE), ) def _network_already_configured(self) -> bool: sem = self._get_per_boot_network_semaphore() return sem.semaphore.has_run(*sem.args) def apply_network_config(self, bring_up): """Apply the network config. Find the config, determine whether to apply it, apply it via the distro, and optionally bring it up """ from cloudinit.config.schema import ( SchemaType, validate_cloudconfig_schema, ) netcfg, src = self._find_networking_config() if netcfg is None: LOG.info("network config is disabled by %s", src) return def event_enabled_and_metadata_updated(event_type): return update_event_enabled( datasource=self.datasource, cfg=self.cfg, event_source_type=event_type, scope=EventScope.NETWORK, ) and self.datasource.update_metadata_if_supported([event_type]) def should_run_on_boot_event(): return ( not self._network_already_configured() and event_enabled_and_metadata_updated(EventType.BOOT) ) if ( self.datasource is not None and not self.is_new_instance() and not should_run_on_boot_event() and not event_enabled_and_metadata_updated(EventType.BOOT_LEGACY) ): LOG.debug( "No network config applied. Neither a new instance" " nor datasource network update allowed" ) # nothing new, but ensure proper names self._apply_netcfg_names(netcfg) return # refresh netcfg after update netcfg, src = self._find_networking_config() self._write_network_config_json(netcfg) if netcfg: validate_cloudconfig_schema( config=netcfg, schema_type=SchemaType.NETWORK_CONFIG, strict=False, # Warnings not raising exceptions log_details=False, # May have wifi passwords in net cfg log_deprecations=True, ) # ensure all physical devices in config are present self.distro.networking.wait_for_physdevs(netcfg) # apply renames from config self._apply_netcfg_names(netcfg) # rendering config LOG.info( "Applying network configuration from %s bringup=%s: %s", src, bring_up, netcfg, ) sem = self._get_per_boot_network_semaphore() try: with sem.semaphore.lock(*sem.args): return self.distro.apply_network_config( netcfg, bring_up=bring_up ) except net.RendererNotFoundError as e: LOG.error( "Unable to render networking. Network config is " "likely broken: %s", e, ) return except NotImplementedError: LOG.warning( "distro '%s' does not implement apply_network_config. " "networking may not be configured properly.", self.distro, ) return def read_runtime_config(): return util.read_conf(RUN_CLOUD_CONFIG) def fetch_base_config(*, instance_data_file=None) -> dict: return util.mergemanydict( [ # builtin config, hardcoded in settings.py. util.get_builtin_cfg(), # Anything in your conf.d or 'default' cloud.cfg location. util.read_conf_with_confd( CLOUD_CONFIG, instance_data_file=instance_data_file ), # runtime config. I.e., /run/cloud-init/cloud.cfg read_runtime_config(), # Kernel/cmdline parameters override system config util.read_conf_from_cmdline(), ], reverse=True, )