Import migrate2rocky.sh
This script, based on centos2rocky.sh is designed to be able to migrate to Rocky Linux from any EL8 distribution.
This commit is contained in:
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#!/bin/bash
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#
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# migrate2rocky - Migrate another EL8 distribution to RockyLinux 8.
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# By: Peter Ajamian <peter@pajamian.dhs.org>
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# Adapted from centos2rocky.sh by label <label@rockylinux.org>
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#
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## Rocky is RC status. Using this script means you accept all risks of system
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## instability.
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# Path to logfile
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logfile=/var/log/centos2rocky.log
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# Send all output to the logfile as well as stdout.
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truncate -s0 "$logfile"
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exec > >(tee -a "$logfile") 2> >(tee -a "$logfile" >&2)
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# List nocolor last here so that +x doesn't bork the display.
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errcolor=$(tput setaf 1)
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blue=$(tput setaf 4)
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nocolor=$(tput op)
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export LANG=en_US.UTF-8
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SUPPORTED_MAJOR="8"
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SUPPORTED_PLATFORM="platform:el$SUPPORTED_MAJOR"
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ARCH=$(arch)
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repo_urls=(
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"rockybaseos,https://dl.rockylinux.org/pub/rocky/${SUPPORTED_MAJOR}/BaseOS/$ARCH/os/"
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"rockyappstream,https://dl.rockylinux.org/pub/rocky/${SUPPORTED_MAJOR}/AppStream/$ARCH/os/"
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)
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unset CDPATH
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exit_message() {
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printf '%s\n' "$1"
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final_message
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exit 1
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} >&2
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final_message() {
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printf '%s\n' "${errcolor}An error occurred while we were attempting to convert your system to Rocky Linux. Your system may be unstable. Script will now exit to prevent possible damage.$nocolor"
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logmessage
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}
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logmessage(){
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printf '%s\n' "${blue}A log of this installation can be found at $logfile$nocolor"
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}
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# This just grabs a field from os-release and returns it.
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os-release () {
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. /etc/os-release
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if ! [[ ${!1} ]]; then
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return 1
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fi
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printf '%s\n' "${!1}"
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}
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# All of the binaries used by this script are available in a EL8 minimal install
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# and are in /bin, so we should not encounter a system where the script doesn't
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# work unless it's severly broken. This is just a simple check that will cause
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# the script to bail if any expected system utilities are missing.
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bin_check() {
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# Make sure we're root.
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if (( EUID != 0 )); then
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exit_message "You must run this script as root. Either use sudo or 'su -c ${0}'"
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fi
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# Check the platform.
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if [[ $(os-release PLATFORM_ID) != $SUPPORTED_PLATFORM ]]; then
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exit_message "This script must be run on an EL8 distribution. Migration from other distributions is not supported."
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fi
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# We need bash version >= 4 for associative arrays. This will also verify
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# that we're actually running bash.
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if (( BASH_VERSINFO < 4 )); then
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exit_message "bash >= 4.0 is required for this script."
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fi
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local -a missing
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for bin in rpm dnf awk column tee tput mkdir cat arch; do
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if ! type "$bin" >/dev/null 2>&1; then
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missing+=("$bin")
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fi
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done
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if (( ${#missing[@]} )); then
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exit_message "Commands not found: ${missing[@]}. Possible bad PATH setting or corrupt installation."
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fi
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}
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# This function will overwrite the repoquery_results associative array with the
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# info for the resulting package. Note that we explicitly disable the epel repo
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# as a special-case below to avoid having the extras repository map to epel.
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repoquery () {
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local name val prev result=$(
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dnf -q --setopt=epel.excludepkgs=epel-release repoquery -i "$1" ||
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exit_message "Failed to fetch info for package $1."
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)
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if ! [[ $result ]]; then
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# We didn't match this package, the repo could be disabled.
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return 1
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fi
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declare -gA repoquery_results=()
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while IFS=" :" read -r name val; do
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if [[ -z $name ]]; then
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repoquery_results[$prev]+=" $val"
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else
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prev=$name
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repoquery_results[$name]=$val
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fi
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done <<<"$result"
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}
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# This function will overwrite the repoinfo_results associative array with the
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# info for the resulting repository.
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repoinfo () {
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local name val result
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result=$(dnf -q repoinfo "$1") ||
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exit_message "Failed to fetch info for repository $1."
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if [[ $result == 'Total packages: 0' ]]; then
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# We didn't match this repo.
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return 1
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fi
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declare -gA repoinfo_results=()
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while IFS=" :" read -r name val; do
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if [[ -z $name ]]; then
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repoinfo_results[$prev]+=" $val"
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else
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prev=$name
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repoinfo_results[$name]=$val
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fi
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done <<<"$result"
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# dnf repoinfo doesn't return the gpgkey, but we need that so we have to get
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# it from the repo file itself.
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repoinfo_results[Repo-gpgkey]=$(
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awk '
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$1=="['"${repoinfo_results[Repo-id]}"']" {next}
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{if (/^\[.*\]$/) {nextfile}
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else if (sub(/^gpgkey=file:\/\//,"")) print
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}' < "${repoinfo_results[Repo-filename]}"
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)
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}
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collect_system_info () {
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# We need to map rockylinux repository names to the equivalent repositories
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# in the source distro. To do that we look for known packages in each
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# repository and see what repo they came from. We need to use repoquery for
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# this which requires downloading the package, so we pick relatively small
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# packages for this.
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declare -g -A repo_map pkg_repo_map
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pkg_repo_map=(
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[baseos]=rootfiles.noarch
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[appstream]=apr-util-ldap.$ARCH
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[devel]=quota-devel.$ARCH
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[ha]=pacemaker-doc.noarch
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[powertools]=libaec-devel.$ARCH
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[extras]=epel-release.noarch
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)
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PRETTY_NAME=$(os-release PRETTY_NAME)
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printf '%s\n' "${blue}Preparing to migrate $PRETTY_NAME to Rocky Linux 8.$nocolor"
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printf '\n%s' "${blue}Determining repository names for $PRETTY_NAME$nocolor"
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for r in "${!pkg_repo_map[@]}"; do
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printf '.'
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p=${pkg_repo_map[$r]}
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repoquery "$p" || continue
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repo_map[$r]=${repoquery_results[Repository]}
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done
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printf '%s\n' '' '' "Found the following repositories which map from $PRETTY_NAME to Rocky Linux 8:"
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column -t -N "$PRETTY_NAME,Rocky Linux 8" < <(for r in "${!repo_map[@]}"; do
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printf '%s %s\n' "${repo_map[$r]}" "$r"
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done)
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printf '\n%s' "${blue}Getting system package names for $PRETTY_NAME$nocolor."
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# We don't know what the names of these packages are, we have to discover
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# them via various means. The most common means is to look for either a
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# distro-agnostic provides or a filename. In a couple of cases we need to
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# jump through hoops to get a filename that is provided specifically by the
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# source distro.
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# First get info for the baseos repo
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repoinfo "${repo_map[baseos]}"
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declare -g -A pkg_map provides_pkg_map
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provides_pkg_map=(
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[rocky-backgrounds]=system-backgrounds
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[rocky-indexhtml]=redhat-indexhtml
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[rocky-repos]="${repoinfo_results[Repo-filename]}"
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[rocky-logos]=system-logos
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[rocky-gpg-keys]="${repoinfo_results[Repo-gpgkey]}"
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[rocky-release]=system-release
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)
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for pkg in "${!provides_pkg_map[@]}"; do
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printf '.'
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prov=${provides_pkg_map[$pkg]}
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local provides
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set -o pipefail
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provides=$(dnf -q provides "$prov" | awk '{print $1; nextfile}') ||
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exit_message "Can't get package that provides $prov."
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set +o pipefail
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pkg_map[$pkg]=$(dnf -q repoquery --queryformat '%{NAME}' "$provides") ||
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exit_message "Can't get package name for $provides."
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done
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printf '%s\n' '' '' "Found the following system packages which map from $PRETTY_NAME to Rocky Linux 8:"
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column -t -N "$PRETTY_NAME,Rocky Linux 8" < <(for p in "${!pkg_map[@]}"; do
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printf '%s %s\n' "${pkg_map[$p]}" "$p"
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done)
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printf '%s\n' '' "${blue}Getting list of installed system packages$nocolor."
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readarray -t installed_packages < <(rpm -qa --queryformat="%{NAME}\n" "${pkg_map[@]}")
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declare -g -A installed_pkg_check installed_pkg_map
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for p in "${installed_packages[@]}"; do
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installed_pkg_check[$p]=1
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done
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for p in "${!pkg_map[@]}"; do
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if [[ ${installed_pkg_check[${pkg_map[$p]}]} ]]; then
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installed_pkg_map[$p]=${pkg_map[$p]}
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fi
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done;
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printf '%s\n' '' "We will replace the following $PRETTY_NAME packages with their Rocky Linux 8 equivalents"
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column -t -N "Packages to be Removed,Packages to be Installed" < <(
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for p in "${!installed_pkg_map[@]}"; do
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printf '%s %s\n' "${installed_pkg_map[$p]}" "$p"
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done
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)
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# Release packages that are part of SIG's should be listed below when they
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# are available.
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# UPDATE: We may or may not do something with SIG's here, it could just be
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# left as a separate excersize to swap out the sig repos.
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#sigs_to_swap=()
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printf '%s\n' '' "${blue}Getting a list of enabled modules for the system repositories$nocolor."
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# Get a list of system enabled modules.
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readarray -t enabled_modules < <(
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set -e -o pipefail
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dnf -q "${repo_map[@]/#/--repo=}" module list --enabled |
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awk '
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$1 == "@modulefailsafe", /^$/ {next}
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$1 == "Name", /^$/ {if (line++>0 && !/^$/) print $1":"$2}
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'
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set +e +o pipefail
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)
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printf '%s\n' '' "Found the following modules to re-enable at completion:"
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printf '%s\n' "${enabled_modules[@]}" ''
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}
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convert_info_dir=/root/convert
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unset convert_to_rocky reinstall_all_rpms verify_all_rpms
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usage() {
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printf '%s\n' \
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"Usage: ${0##*/} [OPTIONS]" \
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'' \
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'Options:' \
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'-h displays this help' \
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'-r Converts to rocky' \
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'-V Verifies switch' \
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'-R Reinstall all packages' \
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' !! USE WITH CAUTION !!'
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exit 1
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} >&2
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generate_rpm_info() {
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mkdir /root/convert
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printf '%s\n' "${blue}Creating a list of RPMs installed: $1$nocolor"
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rpm -qa --qf "%{NAME}|%{VERSION}|%{RELEASE}|%{INSTALLTIME}|%{VENDOR}|%{BUILDTIME}|%{BUILDHOST}|%{SOURCERPM}|%{LICENSE}|%{PACKAGER}\n" | sort > "${convert_info_dir}/$HOSTNAME-rpm-list-$1.log"
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printf '%s\n' "${blue}Verifying RPMs installed against RPM database: $1$nocolor" ''
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rpm -Va | sort -k3 > "${convert_info_dir}/$HOSTNAME-rpm-list-verified-$1.log"
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}
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package_swaps() {
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# Use dnf shell to swap the system packages out.
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if dnf -y shell --nogpg --disablerepo=\* \
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"${repo_urls[@]/#/--repofrompath=}" <<EOF
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remove ${installed_pkg_map[@]}
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install ${!installed_pkg_map[@]}
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run
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exit
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EOF
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then :
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else return
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fi
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# Distrosync
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printf '%s\n' '' "${blue}Removing dnf cache$nocolor"
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rm -rf /var/cache/{yum,dnf}
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printf '%s\n' "${blue}Ensuring repos are enabled before the package swap$nocolor"
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dnf -y config-manager --set-enabled "${!repo_map[@]}" || {
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printf '%s\n' 'Repo name missing?'
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exit 25
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}
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printf '%s\n' "${blue}Enabling modules$nocolor" ''
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# We may very well need to do a reset/install here, but it takes a decent
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# amount of time, so we're better off just doing an enable unless we end up
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# with an explicit test case where reset/install is needed.
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# dnf -y module reset "${enabled_modules[@]}"
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# dnf -y module install "${enabled_modules[@]}"
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dnf -y module enable "${enabled_modules[@]}" ||
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exit_message "Can't enable modules ${enabled_modules[@]}"
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printf '%s\n' '' "${blue}Syncing packages$nocolor" ''
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dnf -y distro-sync || exit_message "Error during distro-sync."
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}
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#sig_swaps() {
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# exit_message "Not Available"
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#}
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## End actual work
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noopts=0
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while getopts "hrVR" option; do
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(( noopts++ ))
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case "$option" in
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h)
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usage
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;;
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r)
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convert_to_rocky=true
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;;
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V)
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verify_all_rpms=true
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;;
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R)
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exit_message 'Reinstalling all rpms is not supported at this time.'
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# reinstall_all_rpms=true
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;;
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*)
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printf '%s\n' "${errcolor}Invalid switch.$nocolor"
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usage
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;;
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esac
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done
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if (( ! noopts )); then
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usage
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fi
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bin_check
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if [[ $verify_all_rpms ]]; then
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generate_rpm_info begin
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fi
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if [[ $convert_to_rocky ]]; then
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collect_system_info
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package_swaps
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fi
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# Warning, this is potentially dangerous.
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if [[ $reinstall_all_rpms ]]; then
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printf '%s\n' "${errcolor}!! THIS MAY CAUSE ISSUES WITH YOUR SYSTEM !!$nocolor"
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rpm_list=("$(rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE} %{VENDOR}\n" | grep CentOS | awk '{print $1}')")
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if [[ -n "${rpm_list[*]}" ]]; then
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printf '%s ' 'Reinstalling rpms:' "${rpm_list[@]}"
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dnf reinstall "${rpm_list[@]}" -y
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fi
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non_rocky_rpm=("$(rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}|%{VENDOR}|%{PACKAGER}\n" |grep -iv Rocky)")
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if [[ -n ${non_rocky_rpm[*]} ]]; then
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printf '%s\n' "${blue}Non-Rocky packages are installed. This is generally not an issue. If you see centos packages, you may need to address them and file a bug report at https://bugs.rockylinux.org$nocolor"
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printf '\t%s\n' "${non_rocky_rpm[@]}"
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fi
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fi
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if [[ $verify_all_rpms && $convert_to_rocky ]]; then
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generate_rpm_info finish
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printf '%s\n' "${blue}You may review the following files:$nocolor"
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find /root/convert -type f -name "$HOSTNAME-rpms-*.log"
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fi
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printf '\n\n\n'
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if [[ $convert_to_rocky ]]; then
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cat /etc/issue | awk 'NR<=15'
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printf '%s\n' "$blue" "Done, please reboot your system.$nocolor"
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fi
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logmessage
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Reference in New Issue