images/elements/rocky-minimal-yum/root.d/08-yum-chroot

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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} = rocky ]]; then
packages+="rocky-release rocky-repos rocky-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" ]] || \
[[ $DISTRO_NAME == 'rocky' ]]; 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"
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-single "
# 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
if [[ ${DISTRO_NAME} == 'rocky' ]]; then
echo 'stg/rocky' | sudo tee /etc/dnf/vars/contentdir
fi
sudo -E ${HOST_YUM} -y \
--disableexcludes=all \
--setopt=cachedir=$YUM_CACHE/$ARCH/$DIB_RELEASE \
--setopt=reposdir=$TARGET_ROOT/etc/yum.repos.d \
--setopt=install_weak_deps=0 \
--releasever=${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|rocky) ]]; then
_install_pkg_manager ${YUM} curl-minimal libcurl-minimal
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"
}
# The rpmdb has been created by the host RPM. CentOS 7 only
# understands bdb-based db's, while the host is (likey as not) a more
# modern rpm that has created a sqlite db. These don't share files in
# common, so to the in-chroot rpm the db just looks empty. This is a
# super-weird state that the system is in, because everything is
# installed and working, but packages don't look like they are. One
# consequence of this is that yum's querying to setup the $releasever
# variable fails and it remains unset. Because the default .repo
# files use this we get invalid repo paths for any yum commands. The
# easiest way around this seems to be to manually set --releasever=7;
# this way yum can rebuild itself and recreate the rpmdb as it likes.
# This is a mess that can hopefully go away when we don't care about
# CentOS 7. For this reason, we only do this for CentOS 7, to avoid
# hiding any problems on other distros. We only need to do this
# for these initial steps, after that the db is correct.
if [[ ${DISTRO_NAME} = centos && ${DIB_RELEASE%-stream} -le 7 ]]; then
YUM="${YUM} --releasever=${DIB_RELEASE}"
fi
if [[ ${DISTRO_NAME} == 'rocky' ]]; then
YUM="DNF_VAR_contentdir=stg/rocky ${YUM}"
fi
# 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="findutils sudo passwd 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
# 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 \
--setopt=install_weak_deps=0 \
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 -lf $TARGET_ROOT/proc
sudo umount -lf $TARGET_ROOT/dev/pts
sudo umount -lf $TARGET_ROOT/dev
sudo umount -lf $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