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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# Copyright (C) 2009-2010, 2020 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # # Author: Scott Moser # Author: Juerg Haefliger # Author: Matthew Ruffell # # This file is part of cloud-init. See LICENSE file for license information. """Grub Dpkg: Configure grub debconf installation device""" import os from logging import Logger from textwrap import dedent from cloudinit import subp, util from cloudinit.cloud import Cloud from cloudinit.config import Config from cloudinit.config.schema import MetaSchema, get_meta_doc from cloudinit.settings import PER_INSTANCE from cloudinit.subp import ProcessExecutionError MODULE_DESCRIPTION = """\ Configure which device is used as the target for grub installation. This module can be enabled/disabled using the ``enabled`` config key in the ``grub_dpkg`` config dict. The global config key ``grub-dpkg`` is an alias for ``grub_dpkg``. If no installation device is specified this module will execute grub-probe to determine which disk the /boot directory is associated with. The value which is placed into the debconf database is in the format which the grub postinstall script expects. Normally, this is a /dev/disk/by-id/ value, but we do fallback to the plain disk name if a by-id name is not present. If this module is executed inside a container, then the debconf database is seeded with empty values, and install_devices_empty is set to true. """ distros = ["ubuntu", "debian"] meta: MetaSchema = { "id": "cc_grub_dpkg", "name": "Grub Dpkg", "title": "Configure grub debconf installation device", "description": MODULE_DESCRIPTION, "distros": distros, "frequency": PER_INSTANCE, "examples": [ dedent( """\ grub_dpkg: enabled: true grub-pc/install_devices: /dev/sda grub-pc/install_devices_empty: false """ ) ], "activate_by_schema_keys": [], } __doc__ = get_meta_doc(meta) def fetch_idevs(log): """ Fetches the /dev/disk/by-id device grub is installed to. Falls back to plain disk name if no by-id entry is present. """ disk = "" devices = [] try: # get the root disk where the /boot directory resides. disk = subp.subp(["grub-probe", "-t", "disk", "/boot"], capture=True)[ 0 ].strip() except ProcessExecutionError as e: # grub-common may not be installed, especially on containers # FileNotFoundError is a nested exception of ProcessExecutionError if isinstance(e.reason, FileNotFoundError): log.debug("'grub-probe' not found in $PATH") # disks from the container host are present in /proc and /sys # which is where grub-probe determines where /boot is. # it then checks for existence in /dev, which fails as host disks # are not exposed to the container. elif "failed to get canonical path" in e.stderr: log.debug("grub-probe 'failed to get canonical path'") else: # something bad has happened, continue to log the error raise except Exception: util.logexc(log, "grub-probe failed to execute for grub-dpkg") if not disk or not os.path.exists(disk): # If we failed to detect a disk, we can return early return "" try: # check if disk exists and use udevadm to fetch symlinks devices = ( subp.subp( ["udevadm", "info", "--root", "--query=symlink", disk], capture=True, )[0] .strip() .split() ) except Exception: util.logexc( log, "udevadm DEVLINKS symlink query failed for disk='%s'", disk ) log.debug("considering these device symlinks: %s", ",".join(devices)) # filter symlinks for /dev/disk/by-id entries devices = [dev for dev in devices if "disk/by-id" in dev] log.debug("filtered to these disk/by-id symlinks: %s", ",".join(devices)) # select first device if there is one, else fall back to plain name idevs = sorted(devices)[0] if devices else disk log.debug("selected %s", idevs) return idevs def handle( name: str, cfg: Config, cloud: Cloud, log: Logger, args: list ) -> None: mycfg = cfg.get("grub_dpkg", cfg.get("grub-dpkg", {})) if not mycfg: mycfg = {} enabled = mycfg.get("enabled", True) if util.is_false(enabled): log.debug("%s disabled by config grub_dpkg/enabled=%s", name, enabled) return idevs = util.get_cfg_option_str(mycfg, "grub-pc/install_devices", None) if idevs is None: idevs = fetch_idevs(log) idevs_empty = mycfg.get("grub-pc/install_devices_empty") if idevs_empty is None: idevs_empty = not idevs elif not isinstance(idevs_empty, bool): idevs_empty = util.translate_bool(idevs_empty) idevs_empty = str(idevs_empty).lower() # now idevs and idevs_empty are set to determined values # or, those set by user dconf_sel = ( "grub-pc grub-pc/install_devices string %s\n" "grub-pc grub-pc/install_devices_empty boolean %s\n" % (idevs, idevs_empty) ) log.debug( "Setting grub debconf-set-selections with '%s','%s'" % (idevs, idevs_empty) ) try: subp.subp(["debconf-set-selections"], dconf_sel) except Exception: util.logexc(log, "Failed to run debconf-set-selections for grub-dpkg") # vi: ts=4 expandtab