name : cc_apt_configure.py # Copyright (C) 2009-2010 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # # Author: Scott Moser <scott.moser@canonical.com> # Author: Juerg Haefliger <juerg.haefliger@hp.com> # # This file is part of cloud-init. See LICENSE file for license information. """Apt Configure: Configure apt for the user.""" import glob import logging import os import pathlib import re import shutil from textwrap import indent from typing import Dict, Iterable, List, Mapping from cloudinit import features, lifecycle, subp, templater, util from cloudinit.cloud import Cloud from cloudinit.config import Config from cloudinit.config.schema import MetaSchema from cloudinit.gpg import GPG from cloudinit.settings import PER_INSTANCE LOG = logging.getLogger(__name__) # this will match 'XXX:YYY' (ie, 'cloud-archive:foo' or 'ppa:bar') ADD_APT_REPO_MATCH = r"^[\w-]+:\w" APT_LOCAL_KEYS = "/etc/apt/trusted.gpg" APT_TRUSTED_GPG_DIR = "/etc/apt/trusted.gpg.d/" CLOUD_INIT_GPG_DIR = "/etc/apt/cloud-init.gpg.d/" DISABLE_SUITES_REDACT_PREFIX = "# cloud-init disable_suites redacted: " PACKAGE_DEPENDENCY_BY_COMMAND: Mapping[str, str] = { "add-apt-repository": "software-properties-common", "gpg": "gnupg", } meta: MetaSchema = { "id": "cc_apt_configure", "distros": ["ubuntu", "debian", "raspberry-pi-os"], "frequency": PER_INSTANCE, "activate_by_schema_keys": [], } # place where apt stores cached repository data APT_LISTS = "/var/lib/apt/lists" # Files to store proxy information APT_CONFIG_FN = "/etc/apt/apt.conf.d/94cloud-init-config" APT_PROXY_FN = "/etc/apt/apt.conf.d/90cloud-init-aptproxy" # Default keyserver to use DEFAULT_KEYSERVER = "keyserver.ubuntu.com" # Default archive mirrors PRIMARY_ARCH_MIRRORS = { "PRIMARY": "http://archive.ubuntu.com/ubuntu/", "SECURITY": "http://security.ubuntu.com/ubuntu/", } PORTS_MIRRORS = { "PRIMARY": "http://ports.ubuntu.com/ubuntu-ports", "SECURITY": "http://ports.ubuntu.com/ubuntu-ports", } PRIMARY_ARCHES = ["amd64", "i386"] PORTS_ARCHES = ["s390x", "arm64", "armhf", "powerpc", "ppc64el", "riscv64"] UBUNTU_DEFAULT_APT_SOURCES_LIST = """\ # Ubuntu sources have moved to the /etc/apt/sources.list.d/ubuntu.sources # file, which uses the deb822 format. Use deb822-formatted .sources files # to manage package sources in the /etc/apt/sources.list.d/ directory. # See the sources.list(5) manual page for details. """ # List of allowed content in /etc/apt/sources.list when features # APT_DEB822_SOURCE_LIST_FILE is set. Otherwise issue warning about # invalid non-deb822 configuration. DEB822_ALLOWED_APT_SOURCES_LIST = {"ubuntu": UBUNTU_DEFAULT_APT_SOURCES_LIST} def get_default_mirrors( arch=None, ): """returns the default mirrors for the target. These depend on the architecture, for more see: https://wiki.ubuntu.com/UbuntuDevelopment/PackageArchive#Ports""" if arch is None: arch = util.get_dpkg_architecture() if arch in PRIMARY_ARCHES: return PRIMARY_ARCH_MIRRORS.copy() if arch in PORTS_ARCHES: return PORTS_MIRRORS.copy() raise ValueError("No default mirror known for arch %s" % arch) def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None: """process the config for apt_config. This can be called from curthooks if a global apt config was provided or via the "apt" standalone command.""" # feed back converted config, but only work on the subset under 'apt' cfg = convert_to_v3_apt_format(cfg) apt_cfg = cfg.get("apt", {}) if not isinstance(apt_cfg, dict): raise ValueError( "Expected dictionary for 'apt' config, " "found {config_type}".format(config_type=type(apt_cfg)) ) apply_debconf_selections(apt_cfg) with GPG() as gpg_context: apply_apt(apt_cfg, cloud, gpg_context) def _should_configure_on_empty_apt(): # if no config was provided, should apt configuration be done? if util.system_is_snappy(): return False, "system is snappy." if not (subp.which("apt-get") or subp.which("apt")): return False, "no apt commands." return True, "Apt is available." def apply_apt(cfg, cloud, gpg): # cfg is the 'apt' top level dictionary already in 'v3' format. if not cfg: should_config, msg = _should_configure_on_empty_apt() if not should_config: LOG.debug("Nothing to do: No apt config and %s", msg) return LOG.debug("handling apt config: %s", cfg) release = util.lsb_release()["codename"] arch = util.get_dpkg_architecture() mirrors = find_apt_mirror_info(cfg, cloud, arch=arch) LOG.debug("Apt Mirror info: %s", mirrors) matcher = None matchcfg = cfg.get("add_apt_repo_match", ADD_APT_REPO_MATCH) if matchcfg: matcher = re.compile(matchcfg).search _ensure_dependencies(cfg, matcher, cloud) if util.is_false(cfg.get("preserve_sources_list", False)): keys = add_mirror_keys(cfg, cloud, gpg) generate_sources_list(cfg, release, mirrors, cloud, keys) rename_apt_lists(mirrors, arch) try: apply_apt_config(cfg, APT_PROXY_FN, APT_CONFIG_FN) except (IOError, OSError): LOG.exception("Failed to apply proxy or apt config info:") # Process 'apt_source -> sources {dict}' if "sources" in cfg: params = mirrors params["RELEASE"] = release params["MIRROR"] = mirrors["MIRROR"] add_apt_sources( cfg["sources"], cloud, gpg, template_params=params, aa_repo_match=matcher, ) def debconf_set_selections(selections): if not selections.endswith(b"\n"): selections += b"\n" subp.subp( ["debconf-set-selections"], data=selections, capture=True, ) def dpkg_reconfigure(packages): # For any packages that are already installed, but have preseed data # we populate the debconf database, but the filesystem configuration # would be preferred on a subsequent dpkg-reconfigure. # so, what we have to do is "know" information about certain packages # to unconfigure them. unhandled = [] to_config = [] for pkg in packages: if pkg in CONFIG_CLEANERS: LOG.debug("unconfiguring %s", pkg) CONFIG_CLEANERS[pkg]() to_config.append(pkg) else: unhandled.append(pkg) if len(unhandled): LOG.warning( "The following packages were installed and preseeded, " "but cannot be unconfigured: %s", unhandled, ) if len(to_config): subp.subp( ["dpkg-reconfigure", "--frontend=noninteractive"] + list(to_config), data=None, capture=True, ) def apply_debconf_selections(cfg): """apply_debconf_selections - push content to debconf""" # debconf_selections: # set1: | # cloud-init cloud-init/datasources multiselect MAAS # set2: pkg pkg/value string bar selsets = cfg.get("debconf_selections") if not selsets: LOG.debug("debconf_selections was not set in config") return selections = "\n".join([selsets[key] for key in sorted(selsets.keys())]) debconf_set_selections(selections.encode()) # get a complete list of packages listed in input pkgs_cfgd = set() for _key, content in selsets.items(): for line in content.splitlines(): if line.startswith("#"): continue pkg = re.sub(r"[:\s].*", "", line) pkgs_cfgd.add(pkg) pkgs_installed = util.get_installed_packages() LOG.debug("pkgs_cfgd: %s", pkgs_cfgd) need_reconfig = pkgs_cfgd.intersection(pkgs_installed) if not need_reconfig: LOG.debug("no need for reconfig") return dpkg_reconfigure(need_reconfig) def clean_cloud_init(): """clean out any local cloud-init config""" flist = glob.glob(subp.target_path(path="/etc/cloud/cloud.cfg.d/*dpkg*")) LOG.debug("cleaning cloud-init config from: %s", flist) for dpkg_cfg in flist: os.unlink(dpkg_cfg) def mirrorurl_to_apt_fileprefix(mirror): """mirrorurl_to_apt_fileprefix Convert a mirror url to the file prefix used by apt on disk to store cache information for that mirror. To do so do: - take off ???:// - drop tailing / - convert in string / to _""" string = mirror if string.endswith("/"): string = string[0:-1] pos = string.find("://") if pos >= 0: string = string[pos + 3 :] string = string.replace("/", "_") return string def rename_apt_lists(new_mirrors, arch): """rename_apt_lists - rename apt lists to preserve old cache data""" default_mirrors = get_default_mirrors(arch) pre = subp.target_path(APT_LISTS) for name, omirror in default_mirrors.items(): nmirror = new_mirrors.get(name) if not nmirror: continue oprefix = pre + os.path.sep + mirrorurl_to_apt_fileprefix(omirror) nprefix = pre + os.path.sep + mirrorurl_to_apt_fileprefix(nmirror) if oprefix == nprefix: continue olen = len(oprefix) for filename in glob.glob("%s_*" % oprefix): newname = "%s%s" % (nprefix, filename[olen:]) LOG.debug("Renaming apt list %s to %s", filename, newname) try: os.rename(filename, newname) except OSError: # since this is a best effort task, warn with but don't fail LOG.warning("Failed to rename apt list:", exc_info=True) def map_known_suites(suite): """there are a few default names which will be auto-extended. This comes at the inability to use those names literally as suites, but on the other hand increases readability of the cfg quite a lot""" mapping = { "updates": "$RELEASE-updates", "backports": "$RELEASE-backports", "security": "$RELEASE-security", "proposed": "$RELEASE-proposed", "release": "$RELEASE", } try: retsuite = mapping[suite] except KeyError: retsuite = suite return retsuite def disable_deb822_section_without_suites(deb822_entry: str) -> str: """If no active Suites, disable this deb822 source.""" if not re.findall(r"\nSuites:[ \t]+([\w-]+)", deb822_entry): # No Suites remaining in this entry, disable full entry # Reconstitute commented Suites line to original as we disable entry deb822_entry = re.sub(r"\nSuites:.*", "", deb822_entry) deb822_entry = re.sub( rf"{DISABLE_SUITES_REDACT_PREFIX}", "", deb822_entry ) return ( "## Entry disabled by cloud-init, due to disable_suites\n" + indent(deb822_entry, "# disabled by cloud-init: ") ) return deb822_entry def disable_suites_deb822(disabled, src, release) -> str: """reads the deb822 format config and comment disabled suites""" new_src = [] disabled_suite_names = [ templater.render_string(map_known_suites(suite), {"RELEASE": release}) for suite in disabled ] LOG.debug("Disabling suites %s as %s", disabled, disabled_suite_names) new_deb822_entry = "" for line in src.splitlines(): if line.startswith("#"): if new_deb822_entry: new_deb822_entry += f"{line}\n" else: new_src.append(line) continue if not line or line.isspace(): # Validate/disable deb822 entry upon whitespace if new_deb822_entry: new_src.append( disable_deb822_section_without_suites(new_deb822_entry) ) new_deb822_entry = "" new_src.append(line) continue new_line = line if not line.startswith("Suites:"): new_deb822_entry += line + "\n" continue # redact all disabled suite names if disabled_suite_names: # Redact any matching Suites from line orig_suites = line.split()[1:] new_suites = [ suite for suite in orig_suites if suite not in disabled_suite_names ] if new_suites != orig_suites: new_deb822_entry += f"{DISABLE_SUITES_REDACT_PREFIX}{line}\n" new_line = f"Suites: {' '.join(new_suites)}" new_deb822_entry += new_line + "\n" if new_deb822_entry: new_src.append(disable_deb822_section_without_suites(new_deb822_entry)) return "\n".join(new_src) def disable_suites(disabled, src, release) -> str: """reads the config for suites to be disabled and removes those from the template""" if not disabled: return src retsrc = src if is_deb822_sources_format(src): return disable_suites_deb822(disabled, src, release) for suite in disabled: suite = map_known_suites(suite) releasesuite = templater.render_string(suite, {"RELEASE": release}) LOG.debug("Disabling suite %s as %s", suite, releasesuite) newsrc = "" for line in retsrc.splitlines(True): if line.startswith("#"): newsrc += line continue # sources.list allow options in cols[1] which can have spaces # so the actual suite can be [2] or later. example: # deb [ arch=amd64,armel k=v ] http://example.com/debian cols = line.split() if len(cols) > 1: pcol = 2 if cols[1].startswith("["): for col in cols[1:]: pcol += 1 if col.endswith("]"): break if cols[pcol] == releasesuite: line = "# suite disabled by cloud-init: %s" % line newsrc += line retsrc = newsrc return retsrc def add_mirror_keys(cfg, cloud, gpg) -> Mapping[str, str]: """Adds any keys included in the primary/security mirror clauses""" keys = {} for key in ("primary", "security"): for mirror in cfg.get(key, []): resp = add_apt_key(mirror, cloud, gpg, file_name=key) if resp: keys[f"{key}_key"] = resp return keys def is_deb822_sources_format(apt_src_content: str) -> bool: """Simple check for deb822 format for apt source content Only validates that minimal required keys are present in the file, which indicates we are likely deb822 format. Doesn't handle if multiple sections all contain deb822 keys. Return True if content looks like it is deb822 formatted APT source. """ # TODO(At jammy EOL: use aptsources.sourceslist.Deb822SourceEntry.invalid) if re.findall(r"^(deb |deb-src )", apt_src_content, re.M): return False if re.findall( r"^(Types: |Suites: |Components: |URIs: )", apt_src_content, re.M ): return True # Did not match any required deb822 format keys LOG.warning( "apt.sources_list value does not match either deb822 source keys or" " deb/deb-src list keys. Assuming APT deb/deb-src list format." ) return False DEFAULT_APT_CFG = { "Dir::Etc": "etc/apt", "Dir::Etc::sourcelist": "sources.list", "Dir::Etc::sourceparts": "sources.list.d", } APT_CFG_RE = ( r"(Dir::Etc|Dir::Etc::sourceparts|Dir::Etc::sourcelist) \"([^\"]+)" ) def get_apt_cfg() -> Dict[str, str]: """Return a dict of applicable apt configuration or defaults. Prefer python apt_pkg if present. Fallback to apt-config dump command if present out output parsed Fallback to DEFAULT_APT_CFG if apt-config command absent or output unparsable. """ try: # python3-apt package is only a Recommends: not a strict Requires: # in debian/control. Prefer the apt_pkg python module for APT # interaction due to 7 ms performance improvement above subp. # Given that debian/buntu images may not contain python3-apt # fallback to subp if the image lacks this dependency. import apt_pkg # type: ignore apt_pkg.init_config() etc = apt_pkg.config.get("Dir::Etc", DEFAULT_APT_CFG["Dir::Etc"]) sourcelist = apt_pkg.config.get( "Dir::Etc::sourcelist", DEFAULT_APT_CFG["Dir::Etc::sourcelist"] ) sourceparts = apt_pkg.config.get( "Dir::Etc::sourceparts", DEFAULT_APT_CFG["Dir::Etc::sourceparts"] ) except ImportError: try: apt_dump, _ = subp.subp(["apt-config", "dump"]) except subp.ProcessExecutionError: # No apt-config, return defaults etc = DEFAULT_APT_CFG["Dir::Etc"] sourcelist = DEFAULT_APT_CFG["Dir::Etc::sourcelist"] sourceparts = DEFAULT_APT_CFG["Dir::Etc::sourceparts"] return { "sourcelist": f"/{etc}/{sourcelist}", "sourceparts": f"/{etc}/{sourceparts}/", } matched_cfg = re.findall(APT_CFG_RE, apt_dump) apt_cmd_config = dict(matched_cfg) etc = apt_cmd_config.get("Dir::Etc", DEFAULT_APT_CFG["Dir::Etc"]) sourcelist = apt_cmd_config.get( "Dir::Etc::sourcelist", DEFAULT_APT_CFG["Dir::Etc::sourcelist"] ) sourceparts = apt_cmd_config.get( "Dir::Etc::sourceparts", DEFAULT_APT_CFG["Dir::Etc::sourceparts"] ) return { "sourcelist": f"/{etc}/{sourcelist}", "sourceparts": f"/{etc}/{sourceparts}/", } def generate_sources_list(cfg, release, mirrors, cloud, keys): """generate_sources_list create a source.list file based on a custom or default template by replacing mirrors and release in the template""" apt_cfg = get_apt_cfg() apt_sources_list = apt_cfg["sourcelist"] apt_sources_deb822 = f"{apt_cfg['sourceparts']}{cloud.distro.name}.sources" if features.APT_DEB822_SOURCE_LIST_FILE: aptsrc_file = apt_sources_deb822 else: aptsrc_file = apt_sources_list params = {"RELEASE": release, "codename": release} params.update(keys) for k in mirrors: params[k] = mirrors[k] params[k.lower()] = mirrors[k] tmpl = cfg.get("sources_list", None) if not tmpl: LOG.info("No custom template provided, fall back to builtin") tmpl_fmt = ".deb822" if features.APT_DEB822_SOURCE_LIST_FILE else "" template_fn = cloud.get_template_filename( f"sources.list.{cloud.distro.name}{tmpl_fmt}" ) if not template_fn: template_fn = cloud.get_template_filename("sources.list") if not template_fn: LOG.warning("No template found, not rendering %s", aptsrc_file) return tmpl = util.load_text_file(template_fn) rendered = templater.render_string(tmpl, params) if tmpl: if is_deb822_sources_format(rendered): if aptsrc_file == apt_sources_list: LOG.debug( "Provided 'sources_list' user-data is deb822 format," " writing to %s", apt_sources_deb822, ) aptsrc_file = apt_sources_deb822 else: LOG.debug( "Provided 'sources_list' user-data is not deb822 format," " fallback to %s", apt_sources_list, ) aptsrc_file = apt_sources_list disabled = disable_suites(cfg.get("disable_suites"), rendered, release) util.write_file(aptsrc_file, disabled, mode=0o644) if aptsrc_file == apt_sources_deb822 and os.path.exists(apt_sources_list): expected_content = DEB822_ALLOWED_APT_SOURCES_LIST.get( cloud.distro.name ) if expected_content: if expected_content != util.load_text_file(apt_sources_list): LOG.info( "Replacing %s to favor deb822 source format", apt_sources_list, ) util.write_file( apt_sources_list, UBUNTU_DEFAULT_APT_SOURCES_LIST ) else: LOG.info( "Removing %s to favor deb822 source format", apt_sources_list ) util.del_file(apt_sources_list) def add_apt_key_raw(key, file_name, gpg, hardened=False): """ actual adding of a key as defined in key argument to the system """ LOG.debug("Adding key:\n'%s'", key) try: name = pathlib.Path(file_name).stem return apt_key( "add", gpg, output_file=name, data=key, hardened=hardened ) except subp.ProcessExecutionError: LOG.exception("failed to add apt GPG Key to apt keyring") raise def _ensure_dependencies(cfg, aa_repo_match, cloud): """Install missing package dependencies based on apt_sources config. Inspect the cloud config user-data provided. When user-data indicates conditions where add_apt_key or add-apt-repository will be called, ensure the required command dependencies are present installed. Perform this inspection upfront because it is very expensive to call distro.install_packages due to a preliminary 'apt update' called before package installation. """ missing_packages: List[str] = [] required_cmds: Iterable[str] = set() if util.is_false(cfg.get("preserve_sources_list", False)): for mirror_key in ("primary", "security"): if cfg.get(mirror_key): # Include gpg when mirror_key non-empty list and any item # defines key or keyid. for mirror_item in cfg[mirror_key]: if {"key", "keyid"}.intersection(mirror_item): required_cmds.add("gpg") apt_sources_dict = cfg.get("sources", {}) for ent in apt_sources_dict.values(): if {"key", "keyid"}.intersection(ent): required_cmds.add("gpg") if aa_repo_match(ent.get("source", "")): required_cmds.add("add-apt-repository") for command in required_cmds: if not shutil.which(command): missing_packages.append(PACKAGE_DEPENDENCY_BY_COMMAND[command]) if missing_packages: cloud.distro.install_packages(sorted(missing_packages)) def add_apt_key(ent, cloud, gpg, hardened=False, file_name=None): """ Add key to the system as defined in ent (if any). Supports raw keys or keyid's The latter will as a first step fetched to get the raw key """ if "keyid" in ent and "key" not in ent: keyserver = DEFAULT_KEYSERVER if "keyserver" in ent: keyserver = ent["keyserver"] ent["key"] = gpg.getkeybyid(ent["keyid"], keyserver) if "key" in ent: return add_apt_key_raw( ent["key"], file_name or ent["filename"], gpg, hardened=hardened ) def add_apt_sources( srcdict, cloud, gpg, template_params=None, aa_repo_match=None ): """ install keys and repo source .list files defined in 'sources' for each 'source' entry in the config: 1. expand template variables and write source .list file in /etc/apt/sources.list.d/ 2. install defined keys 3. update packages via distro-specific method (i.e. apt-key update) @param srcdict: a dict containing elements required @param cloud: cloud instance object Example srcdict value: { 'rio-grande-repo': { 'source': 'deb [signed-by=$KEY_FILE] $MIRROR $RELEASE main', 'keyid': 'B59D 5F15 97A5 04B7 E230 6DCA 0620 BBCF 0368 3F77', 'keyserver': 'pgp.mit.edu' } } Note: Deb822 format is not supported """ if template_params is None: template_params = {} if aa_repo_match is None: raise ValueError("did not get a valid repo matcher") if not isinstance(srcdict, dict): raise TypeError("unknown apt format: %s" % (srcdict)) for filename in srcdict: ent = srcdict[filename] LOG.debug("adding source/key '%s'", ent) if "filename" not in ent: ent["filename"] = filename if "source" in ent and "$KEY_FILE" in ent["source"]: key_file = add_apt_key(ent, cloud, gpg, hardened=True) template_params["KEY_FILE"] = key_file else: add_apt_key(ent, cloud, gpg) if "source" not in ent: continue source = ent["source"] source = templater.render_string(source, template_params) if not ent["filename"].startswith("/"): ent["filename"] = os.path.join( "/etc/apt/sources.list.d/", ent["filename"] ) if not ent["filename"].endswith(".list"): ent["filename"] += ".list" if aa_repo_match(source): try: subp.subp( ["add-apt-repository", "--no-update", source], ) except subp.ProcessExecutionError: LOG.exception("add-apt-repository failed.") raise continue sourcefn = subp.target_path(path=ent["filename"]) try: contents = "%s\n" % (source) omode = "a" if "append" in ent and not ent["append"]: omode = "w" util.write_file(sourcefn, contents, omode=omode) except IOError as detail: LOG.exception("failed write to file %s: %s", sourcefn, detail) raise cloud.distro.update_package_sources(force=True) return def convert_v1_to_v2_apt_format(srclist): """convert v1 apt format to v2 (dict in apt_sources)""" srcdict = {} lifecycle.deprecate( deprecated="Config key 'apt_sources'", deprecated_version="22.1", extra_message="Use 'apt' instead", ) if isinstance(srclist, list): LOG.debug("apt config: convert V1 to V2 format (source list to dict)") for srcent in srclist: if "filename" not in srcent: # file collides for multiple !filename cases for compatibility # yet we need them all processed, so not same dictionary key srcent["filename"] = "cloud_config_sources.list" key = util.rand_dict_key(srcdict, "cloud_config_sources.list") else: # all with filename use that as key (matching new format) key = srcent["filename"] srcdict[key] = srcent elif isinstance(srclist, dict): srcdict = srclist else: raise ValueError("unknown apt_sources format") return srcdict def convert_key(oldcfg, aptcfg, oldkey, newkey): """convert an old key to the new one if the old one exists returns true if a key was found and converted""" if oldcfg.get(oldkey, None) is not None: aptcfg[newkey] = oldcfg.get(oldkey) del oldcfg[oldkey] return True return False def convert_mirror(oldcfg, aptcfg): """convert old apt_mirror keys into the new more advanced mirror spec""" keymap = [ ("apt_mirror", "uri"), ("apt_mirror_search", "search"), ("apt_mirror_search_dns", "search_dns"), ] converted = False newmcfg = {"arches": ["default"]} for oldkey, newkey in keymap: if convert_key(oldcfg, newmcfg, oldkey, newkey): converted = True # only insert new style config if anything was converted if converted: aptcfg["primary"] = [newmcfg] def convert_v2_to_v3_apt_format(oldcfg): """convert old to new keys and adapt restructured mirror spec""" mapoldkeys = { "apt_sources": "sources", "apt_mirror": None, "apt_mirror_search": None, "apt_mirror_search_dns": None, "apt_proxy": "proxy", "apt_http_proxy": "http_proxy", "apt_ftp_proxy": "https_proxy", "apt_https_proxy": "ftp_proxy", "apt_preserve_sources_list": "preserve_sources_list", "apt_custom_sources_list": "sources_list", "add_apt_repo_match": "add_apt_repo_match", } needtoconvert = [] for oldkey in mapoldkeys: if oldkey in oldcfg: if oldcfg[oldkey] in (None, ""): del oldcfg[oldkey] else: needtoconvert.append(oldkey) # no old config, so no new one to be created if not needtoconvert: return oldcfg lifecycle.deprecate( deprecated=f"The following config key(s): {needtoconvert}", deprecated_version="22.1", ) # if old AND new config are provided, prefer the new one (LP #1616831) newaptcfg = oldcfg.get("apt", None) if newaptcfg is not None: lifecycle.deprecate( deprecated="Support for combined old and new apt module keys", deprecated_version="22.1", ) for oldkey in needtoconvert: newkey = mapoldkeys[oldkey] verify = oldcfg[oldkey] # drop, but keep a ref for verification del oldcfg[oldkey] if newkey is None or newaptcfg.get(newkey, None) is None: # no simple mapping or no collision on this particular key continue if verify != newaptcfg[newkey]: raise ValueError( "Old and New apt format defined with unequal " "values %s vs %s @ %s" % (verify, newaptcfg[newkey], oldkey) ) # return conf after clearing conflicting V1/2 keys return oldcfg # create new format from old keys aptcfg = {} # simple renames / moves under the apt key for oldkey in mapoldkeys: if mapoldkeys[oldkey] is not None: convert_key(oldcfg, aptcfg, oldkey, mapoldkeys[oldkey]) # mirrors changed in a more complex way convert_mirror(oldcfg, aptcfg) for oldkey in mapoldkeys: if oldcfg.get(oldkey, None) is not None: raise ValueError("old apt key '%s' left after conversion" % oldkey) # insert new format into config and return full cfg with only v3 content oldcfg["apt"] = aptcfg return oldcfg def convert_to_v3_apt_format(cfg): """convert the old list based format to the new dict based one. After that convert the old dict keys/format to v3 a.k.a 'new apt config'""" # V1 -> V2, the apt_sources entry from list to dict apt_sources = cfg.get("apt_sources", None) if apt_sources is not None: cfg["apt_sources"] = convert_v1_to_v2_apt_format(apt_sources) # V2 -> V3, move all former globals under the "apt" key # Restructure into new key names and mirror hierarchy cfg = convert_v2_to_v3_apt_format(cfg) return cfg def search_for_mirror_dns(configured, mirrortype, cfg, cloud): """ Try to resolve a list of predefines DNS names to pick mirrors """ mirror = None if configured: mydom = "" doms = [] if mirrortype == "primary": mirrordns = "mirror" elif mirrortype == "security": mirrordns = "security-mirror" else: raise ValueError("unknown mirror type") # if we have a fqdn, then search its domain portion first fqdn = util.get_hostname_fqdn(cfg, cloud).fqdn mydom = ".".join(fqdn.split(".")[1:]) if mydom: doms.append(".%s" % mydom) doms.extend( ( ".localdomain", "", ) ) mirror_list = [] distro = cloud.distro.name mirrorfmt = "http://%s-%s%s/%s" % (distro, mirrordns, "%s", distro) for post in doms: mirror_list.append(mirrorfmt % (post)) mirror = util.search_for_mirror(mirror_list) return mirror def update_mirror_info(pmirror, smirror, arch, cloud): """sets security mirror to primary if not defined. returns defaults if no mirrors are defined""" if pmirror is not None: if smirror is None: smirror = pmirror return {"PRIMARY": pmirror, "SECURITY": smirror} # None specified at all, get default mirrors from cloud mirror_info = cloud.datasource.get_package_mirror_info() if mirror_info: # get_package_mirror_info() returns a dictionary with # arbitrary key/value pairs including 'primary' and 'security' keys. # caller expects dict with PRIMARY and SECURITY. m = mirror_info.copy() m["PRIMARY"] = m["primary"] m["SECURITY"] = m["security"] return m # if neither apt nor cloud configured mirrors fall back to return get_default_mirrors(arch) def get_arch_mirrorconfig(cfg, mirrortype, arch): """out of a list of potential mirror configurations select and return the one matching the architecture (or default)""" # select the mirror specification (if-any) mirror_cfg_list = cfg.get(mirrortype, None) if mirror_cfg_list is None: return None # select the specification matching the target arch default = None for mirror_cfg_elem in mirror_cfg_list: arches = mirror_cfg_elem.get("arches") or [] if arch in arches: return mirror_cfg_elem if "default" in arches: default = mirror_cfg_elem return default def get_mirror(cfg, mirrortype, arch, cloud): """pass the three potential stages of mirror specification returns None is neither of them found anything otherwise the first hit is returned""" mcfg = get_arch_mirrorconfig(cfg, mirrortype, arch) if mcfg is None: return None # directly specified mirror = mcfg.get("uri", None) # fallback to search if specified if mirror is None: # list of mirrors to try to resolve mirror = util.search_for_mirror(mcfg.get("search", None)) # fallback to search_dns if specified if mirror is None: # list of mirrors to try to resolve mirror = search_for_mirror_dns( mcfg.get("search_dns", None), mirrortype, cfg, cloud ) return mirror def find_apt_mirror_info(cfg, cloud, arch=None): """find_apt_mirror_info find an apt_mirror given the cfg provided. It can check for separate config of primary and security mirrors If only primary is given security is assumed to be equal to primary If the generic apt_mirror is given that is defining for both """ if arch is None: arch = util.get_dpkg_architecture() LOG.debug("got arch for mirror selection: %s", arch) pmirror = get_mirror(cfg, "primary", arch, cloud) LOG.debug("got primary mirror: %s", pmirror) smirror = get_mirror(cfg, "security", arch, cloud) LOG.debug("got security mirror: %s", smirror) mirror_info = update_mirror_info(pmirror, smirror, arch, cloud) # less complex replacements use only MIRROR, derive from primary mirror_info["MIRROR"] = mirror_info["PRIMARY"] return mirror_info def apply_apt_config(cfg, proxy_fname, config_fname): """apply_apt_config Applies any apt*proxy config from if specified """ # Set up any apt proxy cfgs = ( ("proxy", 'Acquire::http::Proxy "%s";'), ("http_proxy", 'Acquire::http::Proxy "%s";'), ("ftp_proxy", 'Acquire::ftp::Proxy "%s";'), ("https_proxy", 'Acquire::https::Proxy "%s";'), ) proxies = [fmt % cfg.get(name) for (name, fmt) in cfgs if cfg.get(name)] if len(proxies): LOG.debug("write apt proxy info to %s", proxy_fname) util.write_file(proxy_fname, "\n".join(proxies) + "\n") elif os.path.isfile(proxy_fname): util.del_file(proxy_fname) LOG.debug("no apt proxy configured, removed %s", proxy_fname) if cfg.get("conf", None): LOG.debug("write apt config info to %s", config_fname) util.write_file(config_fname, cfg.get("conf")) elif os.path.isfile(config_fname): util.del_file(config_fname) LOG.debug("no apt config configured, removed %s", config_fname) def apt_key( command, gpg, output_file=None, data=None, hardened=False, human_output=True, ): """apt-key replacement commands implemented: 'add', 'list', 'finger' @param output_file: name of output gpg file (without .gpg or .asc) @param data: key contents @param human_output: list keys formatted for human parsing @param hardened: write keys to to /etc/apt/cloud-init.gpg.d/ (referred to with [signed-by] in sources file) """ def _get_key_files(): """return all apt keys /etc/apt/trusted.gpg (if it exists) and all keyfiles (and symlinks to keyfiles) in /etc/apt/trusted.gpg.d/ are returned based on apt-key implementation """ key_files = [APT_LOCAL_KEYS] if os.path.isfile(APT_LOCAL_KEYS) else [] for file in os.listdir(APT_TRUSTED_GPG_DIR): if file.endswith((".gpg", ".asc")): key_files.append(APT_TRUSTED_GPG_DIR + file) return key_files if key_files else "" def apt_key_add(gpg_context): """apt-key add <file> returns filepath to new keyring, or '/dev/null' when an error occurs """ file_name = "/dev/null" if not output_file: util.logexc( LOG, 'Unknown filename, failed to add key: "{}"'.format(data) ) else: try: key_dir = ( CLOUD_INIT_GPG_DIR if hardened else APT_TRUSTED_GPG_DIR ) stdout = gpg_context.dearmor(data) file_name = "{}{}.gpg".format(key_dir, output_file) util.write_file(file_name, stdout) except subp.ProcessExecutionError: util.logexc( LOG, "Gpg error, failed to add key: {}".format(data) ) except UnicodeDecodeError: util.logexc( LOG, "Decode error, failed to add key: {}".format(data) ) return file_name def apt_key_list(gpg_context): """apt-key list returns string of all trusted keys (in /etc/apt/trusted.gpg and /etc/apt/trusted.gpg.d/) """ key_list = [] for key_file in _get_key_files(): try: key_list.append( gpg_context.list_keys(key_file, human_output=human_output) ) except subp.ProcessExecutionError as error: LOG.warning('Failed to list key "%s": %s', key_file, error) return "\n".join(key_list) if command == "add": return apt_key_add(gpg) elif command == "finger" or command == "list": return apt_key_list(gpg) else: raise ValueError( "apt_key() commands add, list, and finger are currently supported" ) CONFIG_CLEANERS = { "cloud-init": clean_cloud_init, }