diskimage-builder/diskimage_builder/elements/yum-minimal/root.d/08-yum-chroot
Ian Wienand 27903f90e2 yum-minimal: clean up release package installs
This started a long way from here, when I noticed that "top" on centos
9-stream images wasn't working because ncurses-base wasn't installed.

This led me to the extant install of bash/glibc/ncurses-libs from
Iecf7f7e4c992bb23437b6461cdd04cdca96aafa6.  However it didn't really
explain why these are brought in here.

Reading further it became clearer that over the years of distribution
additions, Fedora updates, etc. this has grown into a bit of a mess.

Refactor the release package installs into a more logical flow,
pulling out checks/comments for Fedora's of ancient history, etc.
Remove the 9-stream package installs; this isn't the place for them,
and the should be brought in by the base packages.

Ultimately, this is intendend to a be a no-op refactor.

Change-Id: Ie7d9a6497d0d20a3303ec0da3d0668c74efa2c3d
2022-04-20 09:11:16 +10:00

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#!/bin/bash
#
# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# 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.
#
# dib-lint: disable=safe_sudo
if [ "${DIB_DEBUG_TRACE:-0}" -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
source $_LIB/common-functions
if [ -f ${TARGET_ROOT}/.extra_settings ] ; then
. ${TARGET_ROOT}/.extra_settings
fi
ARCH=${ARCH:-x86_64}
if [ $ARCH = amd64 ]; then
ARCH=x86_64
elif [[ "arm64" == "$ARCH" ]]; then
ARCH="aarch64"
fi
# Calling elements will need to set DISTRO_NAME and DIB_RELEASE
# TODO Maybe deal with DIB_DISTRIBUTION_MIRROR
http_proxy=${http_proxy:-}
YUM=${YUM:-yum}
WORKING=$(mktemp --tmpdir=${TMP_DIR:-/tmp} -d)
EACTION="rm -r $WORKING"
trap "$EACTION" EXIT
YUM_CACHE=$DIB_IMAGE_CACHE/yum
mkdir -p $YUM_CACHE
# Debian Bullseye and beyond only has DNF locally
HOST_YUM_DOWNLOADER="yumdownloader"
HOST_YUM="yum"
if ! command -v yumdownloader &> /dev/null
then
HOST_YUM_DOWNLOADER="dnf download"
HOST_YUM="dnf"
fi
# Note, on Debian/Ubuntu, %_dbpath is set in the RPM macros as
# ${HOME}/.rpmdb/ -- this makes sense as RPM isn't the system
# packager. This path is relative to the "--root" argument
_RPM="rpm --dbpath=/var/lib/rpm"
# install the [fedora|centos]-[release|repo] packages inside the
# chroot, which are needed to bootstrap yum/dnf
#
# note this runs outside the chroot, where we're assuming the platform
# has yum/yumdownloader/dnf download
function _install_repos {
local packages
local rc
# pre-install the base system packages via rpm. We previously
# just left it up to yum to drag these in when we "yum install
# yum" in the chroot in _install_pkg_manager. This raised a small
# problem that inside the empty chroot yum went ahead and did a
# mkdir for /var/run to put some pid file in, which then messed up
# the "filesystem" package making /var/run a symlink to /run
# ... which leads to odd issues with a running system.
#
# TODO: these packages still have some small %posttrans stuff that
# depends on other packages (see rhbz#1306489) ... maybe the idea
# is that they are only installed in one big transaction with the
# rest of the system? but we don't want to use yum to do this
# (see above) so ...
packages="${DIB_YUM_MINIMAL_BOOTSTRAP_PACKAGES:-} "
packages+="basesystem filesystem setup "
if [[ ${DISTRO_NAME} = fedora ]]; then
packages+="fedora-release-cloud fedora-release-common "
packages+="fedora-repos fedora-gpg-keys"
elif [[ ${DISTRO_NAME} = centos && ${DIB_RELEASE%-stream} -gt 7 ]]; then
packages+="centos-gpg-keys "
if [[ "$DIB_RELEASE" =~ (stream) ]]; then
packages+="centos-stream-release centos-stream-repos "
else
packages+="centos-linux-release centos-linux-repos "
fi
elif [[ ${DISTRO_NAME} == 'openeuler' ]]; then
packages+="openEuler-release "
packages+="openEuler-repos openEuler-gpg-keys "
else
# NOTE(ianw) 2022-04-20 : can probably remove when we don't
# support centos 7, unlikely anything else ends up here at
# this point.
packages+="${DISTRO_NAME}-release "
fi
# By default, parent elements (fedora-minimal, centos-minimal)
# have a yum.repos.d directory in the element with a default repo;
# this is copied to TMP_HOOK_PATH by the usual hook-copying
# routines. In the gate, environment.d files for the funtional
# tests will set DIB_YUM_MINIMAL_BOOTSTRAP_REPOS -- this contains
# mirrors correct for the region setup by the
# dib-setup-gate-mirrors role.
local repo=${DIB_YUM_MINIMAL_BOOTSTRAP_REPOS:-}
if [[ -z ${repo} ]]; then
# take in preference more specific subdirs
if [[ -d ${TMP_HOOKS_PATH}/yum.repos.d/${DIB_RELEASE} ]]; then
repo=${TMP_HOOKS_PATH}/yum.repos.d/${DIB_RELEASE}
else
repo=${TMP_HOOKS_PATH}/yum.repos.d
fi
fi
# yumdownloader puts repo xml files and such into a directory
# ${TMPDIR}/yum-$USER-random. Since we don't need this once the
# initial download happens, redirect TMPDIR for this call so we
# can clean it up nicely
#
# Note that the $releasever for centos-stream is just the major
# version. There is another variable "$stream" that we don't pass
local temp_tmp
temp_tmp=$(mktemp -d)
TMPDIR=${temp_tmp} ${HOST_YUM_DOWNLOADER} --verbose \
--releasever=${DIB_RELEASE/-*/} \
--setopt=reposdir=$repo \
--setopt=cachedir=$temp_tmp \
--destdir=$WORKING \
${packages} && rc=$? || rc=$?
rm -rf ${temp_tmp}
if [[ ${rc} != 0 ]]; then
die "Failed to download initial packages: ${packages}"
fi
# --nodeps works around these wanting /bin/sh in some fedora
# releases, see rhbz#1265873
sudo $_RPM --root $TARGET_ROOT --nodeps -ivh $WORKING/*rpm
# install the bootstrap mirror repos over the default ones, if
# set. we will remove this at the end so the final image has
# regular mirrors
if [[ -n ${DIB_YUM_MINIMAL_BOOTSTRAP_REPOS:-} ]]; then
for repo in $TARGET_ROOT/etc/yum.repos.d/*.repo; do
sudo mv $repo $repo.USING_MIRROR
done
sudo cp ${DIB_YUM_MINIMAL_BOOTSTRAP_REPOS}/* \
$TARGET_ROOT/etc/yum.repos.d/
fi
if [[ -n ${DIB_YUM_MINIMAL_EXTRA_REPOS:-} ]]; then
sudo cp ${DIB_YUM_MINIMAL_EXTRA_REPOS}/* \
$TARGET_ROOT/etc/yum.repos.d/
fi
# For openEuler, some repos like update are disabled by default.
# Ensure all the repo is enabled, so that we get the latest packages.
if [[ ${DISTRO_NAME} == 'openeuler' ]]; then
sudo sed -i 's/enabled=0/enabled=1/' $TARGET_ROOT/etc/yum.repos.d/*.repo
fi
}
# _install_pkg_manager packages...
#
# install the package manager packages. This is done outside the chroot
# and with yum from the build system.
# TODO: one day build systems will be dnf only, but we don't handle
# that right now
function _install_pkg_manager {
# Install into the chroot, using the gpg keys from the release
# rpm's installed in the chroot
sudo sed -i "s,/etc/pki/rpm-gpg,$TARGET_ROOT/etc/pki/rpm-gpg,g" \
$TARGET_ROOT/etc/yum.repos.d/*repo
# See notes on $_RPM variable -- we need to override the
# $HOME-based dbpath set on debian/ubuntu here. Unfortunately,
# yum does not have a way to override rpm macros from the command
# line. So we modify the user's ~/.rpmmacros to set %_dbpath back
# to "/var/lib/rpm" (note, this is taken relative to the
# --installroot).
#
# Also note, we only want this done around this call -- this is
# the only place we are using yum outside the chroot, and hence
# picking up the base-system's default rpm macros. For example,
# the yumdownloader calls above in _install_repos want to use
# ~/.rpmdb/ ... there is nothing in the build-system /var/lib/rpm!
#
# Another issue we hit is having to set --releasever here. yum
# determines $releasever based on (more or less) "rpm -q
# --whatprovides $distroverpkg". By default, this is
# "redhat-release" (fedora-release provides redhat-release) but
# some platforms like CentOS override it in /etc/yum.conf (to
# centos-release in their case). You can't override this (see
# [1]), but setting --releasever works around this.
#
# [1] https://bugzilla.redhat.com/show_bug.cgi?id=1287333
(
flock -w 1200 9 || die "Can not lock .rpmmacros"
echo "%_dbpath /var/lib/rpm" >> $HOME/.rpmmacros
local _lang_pack=""
local _extra_pkgs=""
if [[ $DISTRO_NAME == "fedora" ]] || \
[[ $DISTRO_NAME == "centos" && $DIB_RELEASE > "7" ]]; then
# glibc from F24 onwards has split locales into "langpack"
# packages. Host yum doesn't understand the
# weak-dependencies glibc now uses to get the
# minimal-langpack and chooses a random(ish) one that
# satisfies the locale dependency (rhbz#1349258).
# Work-around this by explicitly requring the minimal and
# english (for en_US.UTF-8) pack.
_lang_pack="glibc-minimal-langpack glibc-langpack-en"
fi
# Yum has some issues choosing weak dependencies. It can end
# up choosing "coreutils-single" instead of "coreutils" which
# causes problems later when a package actually requires
# coreutils. For more info see
# https://bugzilla.redhat.com/show_bug.cgi?id=1286445
# Really all we can do is pre-install the right thing
_extra_pkgs+="coreutils "
# Legacy yum reads vars from directory /etc/yum/vars and, unlike dnf,
# does not provide setopt=varsdir. So, if $YUM is legacy yum and our
# target root is dnf, symlink dnf vars.
if [[ ! -d $TARGET_ROOT/etc/yum/vars ]]; then
sudo mkdir -p $TARGET_ROOT/etc/yum
sudo ln -s $TARGET_ROOT/etc/dnf/vars $TARGET_ROOT/etc/yum/vars
fi
sudo -E ${HOST_YUM} -y \
--disableexcludes=all \
--setopt=cachedir=$YUM_CACHE/$ARCH/$DIB_RELEASE \
--setopt=reposdir=$TARGET_ROOT/etc/yum.repos.d \
--releasever=${DIB_RELEASE/-*/} \
--installroot $TARGET_ROOT \
install $@ ${_lang_pack} ${_extra_pkgs} && rc=$? || rc=$?
# we may have symlinked yum/vars -> dnf/vars, unset if so
sudo unset $TARGET_ROOT/etc/yum/vars 2>/dev/null || true
# Note we've modified the base system's .rpmmacros. Ensure we
# clean it up *always*
# sed makes it easy to remove last line, but not last n lines...
sed -i '$ d' $HOME/.rpmmacros; sed -i '$ d' $HOME/.rpmmacros;
if [ $rc != 0 ]; then
die "Initial yum install to chroot failed! Can not continue."
fi
) 9>$DIB_LOCKFILES/.rpmmacros.dib.lock
# Set gpg path back because subsequent actions will take place in
# the chroot
sudo sed -i "s,$TARGET_ROOT/etc/pki/rpm-gpg,/etc/pki/rpm-gpg,g" \
$TARGET_ROOT/etc/yum.repos.d/*repo
}
# Note this is not usually done for root.d elements (see
# lib/common-functions:mount_proc_dev_sys) but it's important that
# we have things like /dev/urandom around inside the chroot for
# the rpm [pre|post]inst scripts within the packages.
sudo mkdir -p $TARGET_ROOT/proc $TARGET_ROOT/dev $TARGET_ROOT/sys
sudo mount -t proc none $TARGET_ROOT/proc
sudo mount --bind /dev $TARGET_ROOT/dev
sudo mount -t devpts $(mount_dev_pts_options) devpts $TARGET_ROOT/dev/pts
# Mounting /sys as RO indicates to various systemd things
# that we are in a container
sudo mount -o ro -t sysfs none $TARGET_ROOT/sys
# initalize rpmdb
sudo mkdir -p $TARGET_ROOT/var/lib/rpm
sudo $_RPM --root $TARGET_ROOT --initdb
# this makes sure that running yum/dnf in the chroot it can get
# out to download stuff
sudo mkdir $TARGET_ROOT/etc
sudo cp /etc/resolv.conf $TARGET_ROOT/etc/resolv.conf
# Bind mount the external yum cache inside the chroot. Same logic
# as in the yum element to provide for yum caching copied here
# because the sequencing is wrong otherwise
sudo mkdir -p $TMP_MOUNT_PATH/tmp/yum
sudo mount --bind $YUM_CACHE $TMP_MOUNT_PATH/tmp/yum
_install_repos
# Install package manager
# We are somewhat fighting against the "yum" version on the host to
# get things installed correctly. Fedora 27 onwards has a
# "curl-minimal" package that will get pulled in by default for the
# initial install (ianw: I think because the yum doesn't understand
# weak dependencies correctly). This causes problems later if/when
# "curl" gets installed (you need to add --allowerasing to let dnf get
# rid of the old package). To avoid this, just install the full curl
# and first up. On Centos, it's different again and we need to
# specify libcurl as well, or the minimal libcurl packages come in
# causing similar problems. *But* -- we can't also do that on Fedora
# it seems, as it seems like as part of the Fedora modular updates
# (https://docs.fedoraproject.org/en-US/modularity/) we can pick up
# seemingly mismatched libraries.
if [[ ${DISTRO_NAME} =~ (fedora|openeuler) ]]; then
_install_pkg_manager dnf dnf-plugins-core curl
elif [[ ${DISTRO_NAME} == centos && $DIB_RELEASE > "7" ]]; then
_install_pkg_manager dnf dnf-plugins-core curl libcurl
else
_install_pkg_manager yum
fi
# sort of like run_in_target; but we're not in a phase where that
# works yet. strip unnecessary external env vars that can cause
# problems.
function _run_chroot {
local cmd="$@"
sudo -E chroot $TARGET_ROOT env -u TMPDIR sh -c "$cmd"
}
# we just installed yum/dnf with "outside" tools (yum/rpm) which
# might have created /var/lib/[yum|rpm] (etc) that are slighlty
# incompatible. Refresh everything with the in-chroot tools
_run_chroot rpm --rebuilddb
_run_chroot ${YUM} clean all
# populate the lang reduction macro in the chroot
echo "%_install_langs C:en_US:en_US.UTF-8" | \
sudo tee -a $TARGET_ROOT/etc/rpm/macros.langs > /dev/null
_base_packages="systemd passwd findutils sudo util-linux-ng "
# This package is split out from systemd on >F24, dracut is
# missing the dependency and will fail to make an initrd without
# it; see
# https://bugzilla.redhat.com/show_bug.cgi?id=1398505
_base_packages+="systemd-udev "
# bootstrap the environment within the chroot; bring in new
# metadata with an update and install some base packages we need.
_run_chroot ${YUM} -y update
_run_chroot ${YUM} -y \
--setopt=cachedir=/tmp/yum/$ARCH/$DIB_RELEASE \
install ${_base_packages}
# Put in a dummy /etc/resolv.conf over the temporary one we used
# to bootstrap. systemd has a bug/feature [1] that it will assume
# you want systemd-networkd as the network manager and create a
# broken symlink to /run/... if the base image doesn't have one.
# This broken link confuses things like dhclient.
# [1] https://bugzilla.redhat.com/show_bug.cgi?id=1197204
echo -e "# This file intentionally left blank\n" | \
sudo tee $TARGET_ROOT/etc/resolv.conf
# set the most reliable UTF-8 locale
echo -e 'LANG="en_US.UTF-8"' | \
sudo tee $TARGET_ROOT/etc/locale.conf
# default to UTC
_run_chroot ln -sf /usr/share/zoneinfo/UTC \
/etc/localtime
# cleanup
# TODO : move this into a exit trap; and reconsider how
# this integrates with the global exit cleanup path.
sudo umount $TMP_MOUNT_PATH/tmp/yum
sudo umount $TARGET_ROOT/proc
sudo umount $TARGET_ROOT/dev/pts
sudo umount $TARGET_ROOT/dev
sudo umount $TARGET_ROOT/sys
# RPM doesn't know whether files have been changed since install
# At this point though, we know for certain that we have changed no
# config files, so anything marked .rpmnew is just a bug.
for newfile in $(sudo find $TARGET_ROOT -type f -name '*rpmnew') ; do
sudo mv $newfile $(echo $newfile | sed 's/.rpmnew$//')
done
sudo rm -f ${TARGET_ROOT}/.extra_settings