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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/env python3 # This file is part of cloud-init. See LICENSE file for license information. """Query standardized instance metadata provided to machine, returning a JSON structure. Some instance-data values may be binary on some platforms, such as userdata and vendordata. Attempt to decompress and decode UTF-8 any binary values. Any binary values in the instance metadata will be base64-encoded and prefixed with "ci-b64:" in the output. userdata and, where applicable, vendordata may be provided to the machine gzip-compressed (and therefore as binary data). query will attempt to decompress these to a string before emitting the JSON output; if this fails, they are treated as binary. """ import argparse import os import sys from errno import EACCES from cloudinit import log, util from cloudinit.cmd.devel import addLogHandlerCLI, read_cfg_paths from cloudinit.handlers.jinja_template import ( convert_jinja_instance_data, get_jinja_variable_alias, render_jinja_payload, ) from cloudinit.sources import REDACT_SENSITIVE_VALUE NAME = "query" LOG = log.getLogger(NAME) def get_parser(parser=None): """Build or extend an arg parser for query utility. @param parser: Optional existing ArgumentParser instance representing the query subcommand which will be extended to support the args of this utility. @returns: ArgumentParser with proper argument configuration. """ if not parser: parser = argparse.ArgumentParser(prog=NAME, description=__doc__) parser.add_argument( "-d", "--debug", action="store_true", default=False, help="Add verbose messages during template render", ) parser.add_argument( "-i", "--instance-data", type=str, help=( "Path to instance-data.json file. Default is " f"{read_cfg_paths().get_runpath('instance_data')}" ), ) parser.add_argument( "-l", "--list-keys", action="store_true", default=False, help=( "List query keys available at the provided instance-data" " ." ), ) parser.add_argument( "-u", "--user-data", type=str, help=( "Path to user-data file. Default is" " /var/lib/cloud/instance/user-data.txt" ), ) parser.add_argument( "-v", "--vendor-data", type=str, help=( "Path to vendor-data file. Default is" " /var/lib/cloud/instance/vendor-data.txt" ), ) parser.add_argument( "varname", type=str, nargs="?", help=( "A dot-delimited specific variable to query from" " instance-data. For example: v1.local_hostname. If the" " value is not JSON serializable, it will be base64-encoded and" ' will contain the prefix "ci-b64:". ' ), ) parser.add_argument( "-a", "--all", action="store_true", default=False, dest="dump_all", help="Dump all available instance-data", ) parser.add_argument( "-f", "--format", type=str, dest="format", help=( "Optionally specify a custom output format string. Any" " instance-data variable can be specified between double-curly" ' braces. For example -f "{{ v2.cloud_name }}"' ), ) return parser def load_userdata(ud_file_path): """Attempt to return a string of user-data from ud_file_path Attempt to decode or decompress if needed. If unable to decode the content, raw bytes will be returned. @returns: String of uncompressed userdata if possible, otherwise bytes. """ bdata = util.load_file(ud_file_path, decode=False) try: return bdata.decode("utf-8") except UnicodeDecodeError: return util.decomp_gzip(bdata, quiet=False, decode=True) def _read_instance_data(instance_data, user_data, vendor_data) -> dict: """Return a dict of merged instance-data, vendordata and userdata. The dict will contain supplemental userdata and vendordata keys sourced from default user-data and vendor-data files. Non-root users will have redacted INSTANCE_JSON_FILE content and redacted vendordata and userdata values. :raise: IOError/OSError on absence of instance-data.json file or invalid access perms. """ uid = os.getuid() paths = read_cfg_paths() if instance_data: instance_data_fn = instance_data else: redacted_data_fn = paths.get_runpath("instance_data") if uid == 0: sensitive_data_fn = paths.get_runpath("instance_data_sensitive") if os.path.exists(sensitive_data_fn): instance_data_fn = sensitive_data_fn else: LOG.warning( "Missing root-readable %s. Using redacted %s instead.", sensitive_data_fn, redacted_data_fn, ) instance_data_fn = redacted_data_fn else: instance_data_fn = redacted_data_fn if user_data: user_data_fn = user_data else: user_data_fn = os.path.join(paths.instance_link, "user-data.txt") if vendor_data: vendor_data_fn = vendor_data else: vendor_data_fn = os.path.join(paths.instance_link, "vendor-data.txt") try: instance_json = util.load_file(instance_data_fn) except (IOError, OSError) as e: if e.errno == EACCES: LOG.error("No read permission on '%s'. Try sudo", instance_data_fn) else: LOG.error("Missing instance-data file: %s", instance_data_fn) raise instance_data = util.load_json(instance_json) if uid != 0: instance_data["userdata"] = "<%s> file:%s" % ( REDACT_SENSITIVE_VALUE, user_data_fn, ) instance_data["vendordata"] = "<%s> file:%s" % ( REDACT_SENSITIVE_VALUE, vendor_data_fn, ) else: instance_data["userdata"] = load_userdata(user_data_fn) instance_data["vendordata"] = load_userdata(vendor_data_fn) return instance_data def _find_instance_data_leaf_by_varname_path( jinja_vars_without_aliases: dict, jinja_vars_with_aliases: dict, varname: str, list_keys: bool, ): """Return the value of the dot-delimited varname path in instance-data Split a dot-delimited jinja variable name path into components, walk the path components into the instance_data and look up a matching jinja variable name or cloud-init's underscore-delimited key aliases. :raises: ValueError when varname represents an invalid key name or path or if list-keys is provided by varname isn't a dict object. """ walked_key_path = "" response = jinja_vars_without_aliases for key_path_part in varname.split("."): try: # Walk key path using complete aliases dict, yet response # should only contain jinja_without_aliases jinja_vars_with_aliases = jinja_vars_with_aliases[key_path_part] except KeyError as e: if walked_key_path: msg = "instance-data '{key_path}' has no '{leaf}'".format( leaf=key_path_part, key_path=walked_key_path ) else: msg = "Undefined instance-data key '{}'".format(varname) raise ValueError(msg) from e if key_path_part in response: response = response[key_path_part] else: # We are an underscore_delimited key alias for key in response: if get_jinja_variable_alias(key) == key_path_part: response = response[key] break if walked_key_path: walked_key_path += "." walked_key_path += key_path_part return response def handle_args(name, args): """Handle calls to 'cloud-init query' as a subcommand.""" addLogHandlerCLI(LOG, log.DEBUG if args.debug else log.WARNING) if not any([args.list_keys, args.varname, args.format, args.dump_all]): LOG.error( "Expected one of the options: --all, --format," " --list-keys or varname" ) get_parser().print_help() return 1 try: instance_data = _read_instance_data( args.instance_data, args.user_data, args.vendor_data ) except (IOError, OSError): return 1 if args.format: payload = "## template: jinja\n{fmt}".format(fmt=args.format) rendered_payload = render_jinja_payload( payload=payload, payload_fn="query commandline", instance_data=instance_data, debug=True if args.debug else False, ) if rendered_payload: print(rendered_payload) return 0 return 1 # If not rendering a structured format above, query output will be either: # - JSON dump of all instance-data/jinja variables # - JSON dump of a value at an dict path into the instance-data dict. # - a list of keys for a specific dict path into the instance-data dict. response = convert_jinja_instance_data(instance_data) if args.varname: jinja_vars_with_aliases = convert_jinja_instance_data( instance_data, include_key_aliases=True ) try: response = _find_instance_data_leaf_by_varname_path( jinja_vars_without_aliases=response, jinja_vars_with_aliases=jinja_vars_with_aliases, varname=args.varname, list_keys=args.list_keys, ) except (KeyError, ValueError) as e: LOG.error(e) return 1 if args.list_keys: if not isinstance(response, dict): LOG.error( "--list-keys provided but '%s' is not a dict", args.varname ) return 1 response = "\n".join(sorted(response.keys())) if not isinstance(response, str): response = util.json_dumps(response) print(response) return 0 def main(): """Tool to query specific instance-data values.""" parser = get_parser() sys.exit(handle_args(NAME, parser.parse_args())) if __name__ == "__main__": main()