# Copyright 2014-2015 Canonical Limited. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from collections import OrderedDict import os import platform import re import six import time import subprocess from charmhelpers.core.host import ( get_distrib_codename, CompareHostReleases, ) from charmhelpers.core.hookenv import ( log, DEBUG, WARNING, env_proxy_settings, ) from charmhelpers.fetch import SourceConfigError, GPGKeyError PROPOSED_POCKET = ( "# Proposed\n" "deb http://archive.ubuntu.com/ubuntu {}-proposed main universe " "multiverse restricted\n") PROPOSED_PORTS_POCKET = ( "# Proposed\n" "deb http://ports.ubuntu.com/ubuntu-ports {}-proposed main universe " "multiverse restricted\n") # Only supports 64bit and ppc64 at the moment. ARCH_TO_PROPOSED_POCKET = { 'x86_64': PROPOSED_POCKET, 'ppc64le': PROPOSED_PORTS_POCKET, 'aarch64': PROPOSED_PORTS_POCKET, 's390x': PROPOSED_PORTS_POCKET, } CLOUD_ARCHIVE_URL = "http://ubuntu-cloud.archive.canonical.com/ubuntu" CLOUD_ARCHIVE_KEY_ID = '5EDB1B62EC4926EA' CLOUD_ARCHIVE = """# Ubuntu Cloud Archive deb http://ubuntu-cloud.archive.canonical.com/ubuntu {} main """ CLOUD_ARCHIVE_POCKETS = { # Folsom 'folsom': 'precise-updates/folsom', 'folsom/updates': 'precise-updates/folsom', 'precise-folsom': 'precise-updates/folsom', 'precise-folsom/updates': 'precise-updates/folsom', 'precise-updates/folsom': 'precise-updates/folsom', 'folsom/proposed': 'precise-proposed/folsom', 'precise-folsom/proposed': 'precise-proposed/folsom', 'precise-proposed/folsom': 'precise-proposed/folsom', # Grizzly 'grizzly': 'precise-updates/grizzly', 'grizzly/updates': 'precise-updates/grizzly', 'precise-grizzly': 'precise-updates/grizzly', 'precise-grizzly/updates': 'precise-updates/grizzly', 'precise-updates/grizzly': 'precise-updates/grizzly', 'grizzly/proposed': 'precise-proposed/grizzly', 'precise-grizzly/proposed': 'precise-proposed/grizzly', 'precise-proposed/grizzly': 'precise-proposed/grizzly', # Havana 'havana': 'precise-updates/havana', 'havana/updates': 'precise-updates/havana', 'precise-havana': 'precise-updates/havana', 'precise-havana/updates': 'precise-updates/havana', 'precise-updates/havana': 'precise-updates/havana', 'havana/proposed': 'precise-proposed/havana', 'precise-havana/proposed': 'precise-proposed/havana', 'precise-proposed/havana': 'precise-proposed/havana', # Icehouse 'icehouse': 'precise-updates/icehouse', 'icehouse/updates': 'precise-updates/icehouse', 'precise-icehouse': 'precise-updates/icehouse', 'precise-icehouse/updates': 'precise-updates/icehouse', 'precise-updates/icehouse': 'precise-updates/icehouse', 'icehouse/proposed': 'precise-proposed/icehouse', 'precise-icehouse/proposed': 'precise-proposed/icehouse', 'precise-proposed/icehouse': 'precise-proposed/icehouse', # Juno 'juno': 'trusty-updates/juno', 'juno/updates': 'trusty-updates/juno', 'trusty-juno': 'trusty-updates/juno', 'trusty-juno/updates': 'trusty-updates/juno', 'trusty-updates/juno': 'trusty-updates/juno', 'juno/proposed': 'trusty-proposed/juno', 'trusty-juno/proposed': 'trusty-proposed/juno', 'trusty-proposed/juno': 'trusty-proposed/juno', # Kilo 'kilo': 'trusty-updates/kilo', 'kilo/updates': 'trusty-updates/kilo', 'trusty-kilo': 'trusty-updates/kilo', 'trusty-kilo/updates': 'trusty-updates/kilo', 'trusty-updates/kilo': 'trusty-updates/kilo', 'kilo/proposed': 'trusty-proposed/kilo', 'trusty-kilo/proposed': 'trusty-proposed/kilo', 'trusty-proposed/kilo': 'trusty-proposed/kilo', # Liberty 'liberty': 'trusty-updates/liberty', 'liberty/updates': 'trusty-updates/liberty', 'trusty-liberty': 'trusty-updates/liberty', 'trusty-liberty/updates': 'trusty-updates/liberty', 'trusty-updates/liberty': 'trusty-updates/liberty', 'liberty/proposed': 'trusty-proposed/liberty', 'trusty-liberty/proposed': 'trusty-proposed/liberty', 'trusty-proposed/liberty': 'trusty-proposed/liberty', # Mitaka 'mitaka': 'trusty-updates/mitaka', 'mitaka/updates': 'trusty-updates/mitaka', 'trusty-mitaka': 'trusty-updates/mitaka', 'trusty-mitaka/updates': 'trusty-updates/mitaka', 'trusty-updates/mitaka': 'trusty-updates/mitaka', 'mitaka/proposed': 'trusty-proposed/mitaka', 'trusty-mitaka/proposed': 'trusty-proposed/mitaka', 'trusty-proposed/mitaka': 'trusty-proposed/mitaka', # Newton 'newton': 'xenial-updates/newton', 'newton/updates': 'xenial-updates/newton', 'xenial-newton': 'xenial-updates/newton', 'xenial-newton/updates': 'xenial-updates/newton', 'xenial-updates/newton': 'xenial-updates/newton', 'newton/proposed': 'xenial-proposed/newton', 'xenial-newton/proposed': 'xenial-proposed/newton', 'xenial-proposed/newton': 'xenial-proposed/newton', # Ocata 'ocata': 'xenial-updates/ocata', 'ocata/updates': 'xenial-updates/ocata', 'xenial-ocata': 'xenial-updates/ocata', 'xenial-ocata/updates': 'xenial-updates/ocata', 'xenial-updates/ocata': 'xenial-updates/ocata', 'ocata/proposed': 'xenial-proposed/ocata', 'xenial-ocata/proposed': 'xenial-proposed/ocata', 'xenial-proposed/ocata': 'xenial-proposed/ocata', # Pike 'pike': 'xenial-updates/pike', 'xenial-pike': 'xenial-updates/pike', 'xenial-pike/updates': 'xenial-updates/pike', 'xenial-updates/pike': 'xenial-updates/pike', 'pike/proposed': 'xenial-proposed/pike', 'xenial-pike/proposed': 'xenial-proposed/pike', 'xenial-proposed/pike': 'xenial-proposed/pike', # Queens 'queens': 'xenial-updates/queens', 'xenial-queens': 'xenial-updates/queens', 'xenial-queens/updates': 'xenial-updates/queens', 'xenial-updates/queens': 'xenial-updates/queens', 'queens/proposed': 'xenial-proposed/queens', 'xenial-queens/proposed': 'xenial-proposed/queens', 'xenial-proposed/queens': 'xenial-proposed/queens', # Rocky 'rocky': 'bionic-updates/rocky', 'bionic-rocky': 'bionic-updates/rocky', 'bionic-rocky/updates': 'bionic-updates/rocky', 'bionic-updates/rocky': 'bionic-updates/rocky', 'rocky/proposed': 'bionic-proposed/rocky', 'bionic-rocky/proposed': 'bionic-proposed/rocky', 'bionic-proposed/rocky': 'bionic-proposed/rocky', # Stein 'stein': 'bionic-updates/stein', 'bionic-stein': 'bionic-updates/stein', 'bionic-stein/updates': 'bionic-updates/stein', 'bionic-updates/stein': 'bionic-updates/stein', 'stein/proposed': 'bionic-proposed/stein', 'bionic-stein/proposed': 'bionic-proposed/stein', 'bionic-proposed/stein': 'bionic-proposed/stein', } APT_NO_LOCK = 100 # The return code for "couldn't acquire lock" in APT. CMD_RETRY_DELAY = 10 # Wait 10 seconds between command retries. CMD_RETRY_COUNT = 3 # Retry a failing fatal command X times. def filter_installed_packages(packages): """Return a list of packages that require installation.""" cache = apt_cache() _pkgs = [] for package in packages: try: p = cache[package] p.current_ver or _pkgs.append(package) except KeyError: log('Package {} has no installation candidate.'.format(package), level='WARNING') _pkgs.append(package) return _pkgs def filter_missing_packages(packages): """Return a list of packages that are installed. :param packages: list of packages to evaluate. :returns list: Packages that are installed. """ return list( set(packages) - set(filter_installed_packages(packages)) ) def apt_cache(in_memory=True, progress=None): """Build and return an apt cache.""" from apt import apt_pkg apt_pkg.init() if in_memory: apt_pkg.config.set("Dir::Cache::pkgcache", "") apt_pkg.config.set("Dir::Cache::srcpkgcache", "") return apt_pkg.Cache(progress) def apt_install(packages, options=None, fatal=False): """Install one or more packages.""" if options is None: options = ['--option=Dpkg::Options::=--force-confold'] cmd = ['apt-get', '--assume-yes'] cmd.extend(options) cmd.append('install') if isinstance(packages, six.string_types): cmd.append(packages) else: cmd.extend(packages) log("Installing {} with options: {}".format(packages, options)) _run_apt_command(cmd, fatal) def apt_upgrade(options=None, fatal=False, dist=False): """Upgrade all packages.""" if options is None: options = ['--option=Dpkg::Options::=--force-confold'] cmd = ['apt-get', '--assume-yes'] cmd.extend(options) if dist: cmd.append('dist-upgrade') else: cmd.append('upgrade') log("Upgrading with options: {}".format(options)) _run_apt_command(cmd, fatal) def apt_update(fatal=False): """Update local apt cache.""" cmd = ['apt-get', 'update'] _run_apt_command(cmd, fatal) def apt_purge(packages, fatal=False): """Purge one or more packages.""" cmd = ['apt-get', '--assume-yes', 'purge'] if isinstance(packages, six.string_types): cmd.append(packages) else: cmd.extend(packages) log("Purging {}".format(packages)) _run_apt_command(cmd, fatal) def apt_autoremove(purge=True, fatal=False): """Purge one or more packages.""" cmd = ['apt-get', '--assume-yes', 'autoremove'] if purge: cmd.append('--purge') _run_apt_command(cmd, fatal) def apt_mark(packages, mark, fatal=False): """Flag one or more packages using apt-mark.""" log("Marking {} as {}".format(packages, mark)) cmd = ['apt-mark', mark] if isinstance(packages, six.string_types): cmd.append(packages) else: cmd.extend(packages) if fatal: subprocess.check_call(cmd, universal_newlines=True) else: subprocess.call(cmd, universal_newlines=True) def apt_hold(packages, fatal=False): return apt_mark(packages, 'hold', fatal=fatal) def apt_unhold(packages, fatal=False): return apt_mark(packages, 'unhold', fatal=fatal) def import_key(key): """Import an ASCII Armor key. A Radix64 format keyid is also supported for backwards compatibility. In this case Ubuntu keyserver will be queried for a key via HTTPS by its keyid. This method is less preferrable because https proxy servers may require traffic decryption which is equivalent to a man-in-the-middle attack (a proxy server impersonates keyserver TLS certificates and has to be explicitly trusted by the system). :param key: A GPG key in ASCII armor format, including BEGIN and END markers or a keyid. :type key: (bytes, str) :raises: GPGKeyError if the key could not be imported """ key = key.strip() if '-' in key or '\n' in key: # Send everything not obviously a keyid to GPG to import, as # we trust its validation better than our own. eg. handling # comments before the key. log("PGP key found (looks like ASCII Armor format)", level=DEBUG) if ('-----BEGIN PGP PUBLIC KEY BLOCK-----' in key and '-----END PGP PUBLIC KEY BLOCK-----' in key): log("Writing provided PGP key in the binary format", level=DEBUG) if six.PY3: key_bytes = key.encode('utf-8') else: key_bytes = key key_name = _get_keyid_by_gpg_key(key_bytes) key_gpg = _dearmor_gpg_key(key_bytes) _write_apt_gpg_keyfile(key_name=key_name, key_material=key_gpg) else: raise GPGKeyError("ASCII armor markers missing from GPG key") else: log("PGP key found (looks like Radix64 format)", level=WARNING) log("SECURELY importing PGP key from keyserver; " "full key not provided.", level=WARNING) # as of bionic add-apt-repository uses curl with an HTTPS keyserver URL # to retrieve GPG keys. `apt-key adv` command is deprecated as is # apt-key in general as noted in its manpage. See lp:1433761 for more # history. Instead, /etc/apt/trusted.gpg.d is used directly to drop # gpg key_asc = _get_key_by_keyid(key) # write the key in GPG format so that apt-key list shows it key_gpg = _dearmor_gpg_key(key_asc) _write_apt_gpg_keyfile(key_name=key, key_material=key_gpg) def _get_keyid_by_gpg_key(key_material): """Get a GPG key fingerprint by GPG key material. Gets a GPG key fingerprint (40-digit, 160-bit) by the ASCII armor-encoded or binary GPG key material. Can be used, for example, to generate file names for keys passed via charm options. :param key_material: ASCII armor-encoded or binary GPG key material :type key_material: bytes :raises: GPGKeyError if invalid key material has been provided :returns: A GPG key fingerprint :rtype: str """ # trusty, xenial and bionic handling differs due to gpg 1.x to 2.x change release = get_distrib_codename() is_gpgv2_distro = CompareHostReleases(release) >= "bionic" if is_gpgv2_distro: # --import is mandatory, otherwise fingerprint is not printed cmd = 'gpg --with-colons --import-options show-only --import --dry-run' else: cmd = 'gpg --with-colons --with-fingerprint' ps = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) out, err = ps.communicate(input=key_material) if six.PY3: out = out.decode('utf-8') err = err.decode('utf-8') if 'gpg: no valid OpenPGP data found.' in err: raise GPGKeyError('Invalid GPG key material provided') # from gnupg2 docs: fpr :: Fingerprint (fingerprint is in field 10) return re.search(r"^fpr:{9}([0-9A-F]{40}):$", out, re.MULTILINE).group(1) def _get_key_by_keyid(keyid): """Get a key via HTTPS from the Ubuntu keyserver. Different key ID formats are supported by SKS keyservers (the longer ones are more secure, see "dead beef attack" and https://evil32.com/). Since HTTPS is used, if SSLBump-like HTTPS proxies are in place, they will impersonate keyserver.ubuntu.com and generate a certificate with keyserver.ubuntu.com in the CN field or in SubjAltName fields of a certificate. If such proxy behavior is expected it is necessary to add the CA certificate chain containing the intermediate CA of the SSLBump proxy to every machine that this code runs on via ca-certs cloud-init directive (via cloudinit-userdata model-config) or via other means (such as through a custom charm option). Also note that DNS resolution for the hostname in a URL is done at a proxy server - not at the client side. 8-digit (32 bit) key ID https://keyserver.ubuntu.com/pks/lookup?search=0x4652B4E6 16-digit (64 bit) key ID https://keyserver.ubuntu.com/pks/lookup?search=0x6E85A86E4652B4E6 40-digit key ID: https://keyserver.ubuntu.com/pks/lookup?search=0x35F77D63B5CEC106C577ED856E85A86E4652B4E6 :param keyid: An 8, 16 or 40 hex digit keyid to find a key for :type keyid: (bytes, str) :returns: A key material for the specified GPG key id :rtype: (str, bytes) :raises: subprocess.CalledProcessError """ # options=mr - machine-readable output (disables html wrappers) keyserver_url = ('https://keyserver.ubuntu.com' '/pks/lookup?op=get&options=mr&exact=on&search=0x{}') curl_cmd = ['curl', keyserver_url.format(keyid)] # use proxy server settings in order to retrieve the key return subprocess.check_output(curl_cmd, env=env_proxy_settings(['https'])) def _dearmor_gpg_key(key_asc): """Converts a GPG key in the ASCII armor format to the binary format. :param key_asc: A GPG key in ASCII armor format. :type key_asc: (str, bytes) :returns: A GPG key in binary format :rtype: (str, bytes) :raises: GPGKeyError """ ps = subprocess.Popen(['gpg', '--dearmor'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) out, err = ps.communicate(input=key_asc) # no need to decode output as it is binary (invalid utf-8), only error if six.PY3: err = err.decode('utf-8') if 'gpg: no valid OpenPGP data found.' in err: raise GPGKeyError('Invalid GPG key material. Check your network setup' ' (MTU, routing, DNS) and/or proxy server settings' ' as well as destination keyserver status.') else: return out def _write_apt_gpg_keyfile(key_name, key_material): """Writes GPG key material into a file at a provided path. :param key_name: A key name to use for a key file (could be a fingerprint) :type key_name: str :param key_material: A GPG key material (binary) :type key_material: (str, bytes) """ with open('/etc/apt/trusted.gpg.d/{}.gpg'.format(key_name), 'wb') as keyf: keyf.write(key_material) def add_source(source, key=None, fail_invalid=False): """Add a package source to this system. @param source: a URL or sources.list entry, as supported by add-apt-repository(1). Examples:: ppa:charmers/example deb https://stub:key@private.example.com/ubuntu trusty main In addition: 'proposed:' may be used to enable the standard 'proposed' pocket for the release. 'cloud:' may be used to activate official cloud archive pockets, such as 'cloud:icehouse' 'distro' may be used as a noop Full list of source specifications supported by the function are: 'distro': A NOP; i.e. it has no effect. 'proposed': the proposed deb spec [2] is wrtten to /etc/apt/sources.list/proposed 'distro-proposed': adds -proposed to the debs [2] 'ppa:': add-apt-repository --yes 'deb ': add-apt-repository --yes deb 'http://....': add-apt-repository --yes http://... 'cloud-archive:': add-apt-repository -yes cloud-archive: 'cloud:[-staging]': specify a Cloud Archive pocket with optional staging version. If staging is used then the staging PPA [2] with be used. If staging is NOT used then the cloud archive [3] will be added, and the 'ubuntu-cloud-keyring' package will be added for the current distro. Otherwise the source is not recognised and this is logged to the juju log. However, no error is raised, unless sys_error_on_exit is True. [1] deb http://ubuntu-cloud.archive.canonical.com/ubuntu {} main where {} is replaced with the derived pocket name. [2] deb http://archive.ubuntu.com/ubuntu {}-proposed \ main universe multiverse restricted where {} is replaced with the lsb_release codename (e.g. xenial) [3] deb http://ubuntu-cloud.archive.canonical.com/ubuntu to /etc/apt/sources.list.d/cloud-archive-list @param key: A key to be added to the system's APT keyring and used to verify the signatures on packages. Ideally, this should be an ASCII format GPG public key including the block headers. A GPG key id may also be used, but be aware that only insecure protocols are available to retrieve the actual public key from a public keyserver placing your Juju environment at risk. ppa and cloud archive keys are securely added automtically, so sould not be provided. @param fail_invalid: (boolean) if True, then the function raises a SourceConfigError is there is no matching installation source. @raises SourceConfigError() if for cloud:, the is not a valid pocket in CLOUD_ARCHIVE_POCKETS """ _mapping = OrderedDict([ (r"^distro$", lambda: None), # This is a NOP (r"^(?:proposed|distro-proposed)$", _add_proposed), (r"^cloud-archive:(.*)$", _add_apt_repository), (r"^((?:deb |http:|https:|ppa:).*)$", _add_apt_repository), (r"^cloud:(.*)-(.*)\/staging$", _add_cloud_staging), (r"^cloud:(.*)-(.*)$", _add_cloud_distro_check), (r"^cloud:(.*)$", _add_cloud_pocket), (r"^snap:.*-(.*)-(.*)$", _add_cloud_distro_check), ]) if source is None: source = '' for r, fn in six.iteritems(_mapping): m = re.match(r, source) if m: # call the assoicated function with the captured groups # raises SourceConfigError on error. fn(*m.groups()) if key: try: import_key(key) except GPGKeyError as e: raise SourceConfigError(str(e)) break else: # nothing matched. log an error and maybe sys.exit err = "Unknown source: {!r}".format(source) log(err) if fail_invalid: raise SourceConfigError(err) def _add_proposed(): """Add the PROPOSED_POCKET as /etc/apt/source.list.d/proposed.list Uses get_distrib_codename to determine the correct stanza for the deb line. For intel architecutres PROPOSED_POCKET is used for the release, but for other architectures PROPOSED_PORTS_POCKET is used for the release. """ release = get_distrib_codename() arch = platform.machine() if arch not in six.iterkeys(ARCH_TO_PROPOSED_POCKET): raise SourceConfigError("Arch {} not supported for (distro-)proposed" .format(arch)) with open('/etc/apt/sources.list.d/proposed.list', 'w') as apt: apt.write(ARCH_TO_PROPOSED_POCKET[arch].format(release)) def _add_apt_repository(spec): """Add the spec using add_apt_repository :param spec: the parameter to pass to add_apt_repository :type spec: str """ if '{series}' in spec: series = get_distrib_codename() spec = spec.replace('{series}', series) # software-properties package for bionic properly reacts to proxy settings # passed as environment variables (See lp:1433761). This is not the case # LTS and non-LTS releases below bionic. _run_with_retries(['add-apt-repository', '--yes', spec], cmd_env=env_proxy_settings(['https'])) def _add_cloud_pocket(pocket): """Add a cloud pocket as /etc/apt/sources.d/cloud-archive.list Note that this overwrites the existing file if there is one. This function also converts the simple pocket in to the actual pocket using the CLOUD_ARCHIVE_POCKETS mapping. :param pocket: string representing the pocket to add a deb spec for. :raises: SourceConfigError if the cloud pocket doesn't exist or the requested release doesn't match the current distro version. """ apt_install(filter_installed_packages(['ubuntu-cloud-keyring']), fatal=True) if pocket not in CLOUD_ARCHIVE_POCKETS: raise SourceConfigError( 'Unsupported cloud: source option %s' % pocket) actual_pocket = CLOUD_ARCHIVE_POCKETS[pocket] with open('/etc/apt/sources.list.d/cloud-archive.list', 'w') as apt: apt.write(CLOUD_ARCHIVE.format(actual_pocket)) def _add_cloud_staging(cloud_archive_release, openstack_release): """Add the cloud staging repository which is in ppa:ubuntu-cloud-archive/-staging This function checks that the cloud_archive_release matches the current codename for the distro that charm is being installed on. :param cloud_archive_release: string, codename for the release. :param openstack_release: String, codename for the openstack release. :raises: SourceConfigError if the cloud_archive_release doesn't match the current version of the os. """ _verify_is_ubuntu_rel(cloud_archive_release, openstack_release) ppa = 'ppa:ubuntu-cloud-archive/{}-staging'.format(openstack_release) cmd = 'add-apt-repository -y {}'.format(ppa) _run_with_retries(cmd.split(' ')) def _add_cloud_distro_check(cloud_archive_release, openstack_release): """Add the cloud pocket, but also check the cloud_archive_release against the current distro, and use the openstack_release as the full lookup. This just calls _add_cloud_pocket() with the openstack_release as pocket to get the correct cloud-archive.list for dpkg to work with. :param cloud_archive_release:String, codename for the distro release. :param openstack_release: String, spec for the release to look up in the CLOUD_ARCHIVE_POCKETS :raises: SourceConfigError if this is the wrong distro, or the pocket spec doesn't exist. """ _verify_is_ubuntu_rel(cloud_archive_release, openstack_release) _add_cloud_pocket("{}-{}".format(cloud_archive_release, openstack_release)) def _verify_is_ubuntu_rel(release, os_release): """Verify that the release is in the same as the current ubuntu release. :param release: String, lowercase for the release. :param os_release: String, the os_release being asked for :raises: SourceConfigError if the release is not the same as the ubuntu release. """ ubuntu_rel = get_distrib_codename() if release != ubuntu_rel: raise SourceConfigError( 'Invalid Cloud Archive release specified: {}-{} on this Ubuntu' 'version ({})'.format(release, os_release, ubuntu_rel)) def _run_with_retries(cmd, max_retries=CMD_RETRY_COUNT, retry_exitcodes=(1,), retry_message="", cmd_env=None): """Run a command and retry until success or max_retries is reached. :param: cmd: str: The apt command to run. :param: max_retries: int: The number of retries to attempt on a fatal command. Defaults to CMD_RETRY_COUNT. :param: retry_exitcodes: tuple: Optional additional exit codes to retry. Defaults to retry on exit code 1. :param: retry_message: str: Optional log prefix emitted during retries. :param: cmd_env: dict: Environment variables to add to the command run. """ env = None kwargs = {} if cmd_env: env = os.environ.copy() env.update(cmd_env) kwargs['env'] = env if not retry_message: retry_message = "Failed executing '{}'".format(" ".join(cmd)) retry_message += ". Will retry in {} seconds".format(CMD_RETRY_DELAY) retry_count = 0 result = None retry_results = (None,) + retry_exitcodes while result in retry_results: try: # result = subprocess.check_call(cmd, env=env) result = subprocess.check_call(cmd, **kwargs) except subprocess.CalledProcessError as e: retry_count = retry_count + 1 if retry_count > max_retries: raise result = e.returncode log(retry_message) time.sleep(CMD_RETRY_DELAY) def _run_apt_command(cmd, fatal=False): """Run an apt command with optional retries. :param: cmd: str: The apt command to run. :param: fatal: bool: Whether the command's output should be checked and retried. """ # Provide DEBIAN_FRONTEND=noninteractive if not present in the environment. cmd_env = { 'DEBIAN_FRONTEND': os.environ.get('DEBIAN_FRONTEND', 'noninteractive')} if fatal: _run_with_retries( cmd, cmd_env=cmd_env, retry_exitcodes=(1, APT_NO_LOCK,), retry_message="Couldn't acquire DPKG lock") else: env = os.environ.copy() env.update(cmd_env) subprocess.call(cmd, env=env) def get_upstream_version(package): """Determine upstream version based on installed package @returns None (if not installed) or the upstream version """ import apt_pkg cache = apt_cache() try: pkg = cache[package] except Exception: # the package is unknown to the current apt cache. return None if not pkg.current_ver: # package is known, but no version is currently installed. return None return apt_pkg.upstream_version(pkg.current_ver.ver_str)