rocky-tools/centos2rocky.sh
2021-05-07 17:16:32 -07:00

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#!/usr/bin/env bash
# label <label@rockylinux.org>
# Supports only CentOS 8.3
## Rocky is RC status. Using this script means you accept all risks of system instability.
# Path to logfile
logfile=/var/log/centos2rocky.log
# Send all output to the logfile as well as stdout.
truncate -s0 "$logfile"
exec > >(tee -a "$logfile") 2> >(tee -a "$logfile" >&2)
errcolor=$(tput setaf 1)
nocolor=$(tput op)
blue=$(tput setaf 4)
set -e
unset CDPATH
if [[ "$(id -u)" -ne 0 ]]; then
printf '%s\n' "$errcolor" "You must run this script as root.$nocolor" \
"${errcolor}Either use sudo or 'su -c ${0}'$nocolor"
fi
if ! type curl >/dev/null 2>&1; then
printf '%s\n' "${blue}Curl is not installed! Installing it...$nocolor"
dnf -y install curl libcurl
fi
export LANG=en_US.UTF-8
SUPPORTED_RELEASE="8.3"
SUPPORTED_MAJOR="8"
ARCH=$(arch)
current_url="https://dl.rockylinux.org/pub/rocky/${SUPPORTED_RELEASE}/BaseOS/${ARCH}/os/Packages"
# These are packages that can be swapped safely over and will have more added over time.
packages_to_swap=(
centos-backgrounds \
centos-indexhtml \
centos-linux-repos \
centos-logos \
centos-gpg-keys \
centos-linux-release)
packages_that_exist=($(rpm -q --queryformat="%{NAME}\n" "${packages_to_swap[@]}" | grep -v "not installed"))
release_to_install=($(curl -L -s ${current_url} | awk -F '"' '/rocky-repos|rocky-gpg-keys|rocky-release/ {print $2}'))
# Release packages that are part of SIG's should be listed below when they are available.
#sigs_to_swap=()
# Defaults
list_enabled=("$(dnf repolist enabled | awk '!/repo/ {print $1}')")
enabled_modules=("$(dnf module list --enabled | grep rhel | awk '{print $1}')")
convert_info_dir=/root/convert
reinstall_all_rpms=false
verify_all_rpms=false
usage() {
printf '%s\n' \
"Usage: ${0##*/} [OPTIONS]" \
'' \
'Options:' \
'-h displays this help' \
'-r Converts to rocky' \
'-V Verifies switch' \
'-R Reinstall all packages' \
' !! USE WITH CAUTION !!'
exit 1
} >&2
exit_message() {
printf '%s\n' "$1"
final_message
exit 1
} >&2
final_message() {
printf '%s\n' "${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.$nocolor"
logmessage
}
logmessage(){
printf '%s\n' "${blue}A log of this installation can be found at $logfile$nocolor"
}
## The actual work
bin_hash() {
hash "$1" >/dev/null 2>&1
}
bin_check() {
if ! bin_hash "$1"; then
exit_message "'${1}' command not found. Please ensure you are running bash or that your PATH is set correctly."
logmessage
fi
}
generate_rpm_info() {
mkdir /root/convert
printf '%s\n' "${blue}Creating a list of RPMs installed: $1$nocolor"
rpm -qa --qf "%{NAME}|%{VERSION}|%{RELEASE}|%{INSTALLTIME}|%{VENDOR}|%{BUILDTIME}|%{BUILDHOST}|%{SOURCERPM}|%{LICENSE}|%{PACKAGER}\n" | sort > "${convert_info_dir}/$(hostname)-rpm-list-$1.log"
printf '%s\n' "${blue}Verifying RPMs installed against RPM database: $1$nocolor" ''
rpm -Va | sort -k3 > "${convert_info_dir}/$(hostname)-rpm-list-verified-$1.log"
}
package_swaps() {
mkdir /root/release
pushd /root/release
for x in "${release_to_install[@]}"; do
curl -s "${current_url}/${x}" > "$x" || {
printf '%s\n' "${errcolor}failed to download ${x}$nocolor" '' &&
logmessage
exit 20
}
done
# Remove packages we need to swap
rpm -e --nodeps "${packages_that_exist[@]}"
# Install our release
rpm -ihv "${release_to_install[@]}"
# Distrosync if the above succeeded
if [[ $? -eq 0 ]]; then
printf '%s\n' "${blue}Removing dnf cache$nocolor"
rm -rf /var/cache/{yum,dnf}
printf '%s\n' "${blue}Ensuring repos are enabled before the package swap$nocolor"
dnf config-manager --set-enabled ${list_enabled[@]} || {
printf '%s\n' 'Repo name missing?'
exit 25
}
dnf distro-sync -y
else
exit_message "We failed to install the release package."
logmessage
fi
popd
}
sig_swaps() {
exit_message "Not Available"
}
grub_swap() {
if [ -d /sys/firmware/efi ]; then
grub2-mkconfig -o /boot/efi/EFI/rocky/grub.cfg
else
grub2-mkconfig -o /boot/grub2/grub.cfg
fi
}
module_check() {
printf '%s\n' "${blue}Finding our modules that are enabled$nocolor"
for module in "${enabled_modules[@]}"; do
case ${module} in
container-tools|go-toolset|jmc|llvm-toolset|rust-toolset|virt)
;;
*)
unknown_modules+=("${module}")
;;
esac
done
if [[ ${#unknown_modules[@]} -gt 0 ]]; then
printf '%s\n' "${unknown_modules[@]}" \
"${blue}There are some modules that are unsure of how to handle. This normally shouldn't happen. Do you want to resolve this yourself (Yes) or continue (No)?$nocolor"
select yn in "Yes" "No"; do
case $yn in
Yes)
printf '%s\n' "${errcolor}Unsure how to switch modules, so we are leaving.$nocolor"
logmessage
exit 1
;;
No)
break
;;
esac
done
fi
}
# This is just in case. There is a likelihood this will have to be done.
module_fix() {
for module in "${enabled_modules[@]}"; do
dnf module reset -y "${module}"
case ${module} in
container-tools|go-toolset|jmc|llvm-toolset|rust-toolset|virt)
dnf module install "${module}" -y
;;
*)
printf '%s\n' "${errcolor}Unsure how to deal with the module presented.$nocolor"
logmessage
;;
esac
# Final update
dnf update -y
done
}
## End actual work
while getopts "hrVR" option; do
case "$option" in
h)
usage
;;
r)
reinstall_all_rpms=true
;;
V)
verify_all_rpms=true
;;
*)
printf '%s\n' "${errcolor}Invalid switch.$nocolor"
usage
;;
esac
done
printf '%s\n' "${blue}Ensuring rpm and yum are here.$nocolor"
for pkg in rpm yum curl; do
bin_check "${pkg}"
done
printf '%s\n' "${blue}Ensuring your version of CentOS is supported$nocolor"
if ! old_release=$(rpm -q --whatprovides /etc/redhat-release); then
exit_message "You are not running a supported distribution."
logmessage
fi
if [ "$(echo "${old_release}" | wc -l)" -ne 1 ]; then
exit_message "You seem to have package issues. More than one package provides redhat-release."
logmessage
fi
if ! grep ${SUPPORTED_RELEASE} -q /etc/redhat-release; then
exit_message "${SUPPORTED_RELEASE} is only supported for conversion at this time. Stream is not supported."
logmessage
fi
if "${verify_all_rpms}"; then
generate_rpm_info begin
fi
case "${old_release}" in
centos-linux-release*);;
rocky-release*)
exit_message "You are already running Rocky."
logmessage
;;
*)
exit_message "You are running an unsupported distribution. Good bye."
logmessage
esac
# Check our modules before a swap
module_check
# Actually do the swap and distro-sync
package_swaps
# Reconfigure grub
grub_swap
# Fix up modules
module_fix
# Warning, this is potentially dangerous.
if "${reinstall_all_rpms}"; then
printf '%s\n' "${errcolor}!! THIS MAY CAUSE ISSUES WITH YOUR SYSTEM !!$nocolor"
rpm_list=("$(rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE} %{VENDOR}\n" | grep CentOS | awk '{print $1}')")
if [[ -n "${rpm_list[*]}" ]]; then
printf '%s ' 'Reinstalling rpms:' "${rpm_list[@]}"
dnf reinstall "${rpm_list[@]}" -y
fi
non_rocky_rpm=("$(rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}|%{VENDOR}|%{PACKAGER}\n" |grep -iv Rocky)")
if [[ -n ${non_rocky_rpm[*]} ]]; then
printf '%s\n' "${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$nocolor"
printf '\t%s\n' "${non_rocky_rpm[@]}"
fi
fi
if "${verify_all_rpms}"; then
generate_rpm_info finish
printf '%s\n' "${blue}You may review the following files:$nocolor"
find /root/convert -type f -name "$(hostname)-rpms-*.log"
fi
printf '\n\n\n'
cat /etc/issue | awk 'NR<=15'
printf '%s\n' "$blue" "Done, please reboot your system.$nocolor"
logmessage