2022-09-25 21:57:47 +08:00
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#!/bin/bash
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2023-05-03 22:22:21 +08:00
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confhome=https://raw.githubusercontent.com/bin456789/reinstall/main
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localtest_confhome=http://192.168.253.1
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2022-09-25 21:57:47 +08:00
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2023-05-03 22:22:21 +08:00
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usage_and_exit() {
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echo "Usage: reinstall.sh centos-7/8/9 alma-8/9 rocky-8/9 fedora-36/37/38 ubuntu-20.04/22.04"
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exit 1
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}
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is_in_china() {
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# https://geoip.ubuntu.com/lookup
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curl -L https://geoip.fedoraproject.org/city | grep -w CN
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}
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setos() {
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step=$1
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distro=$2
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releasever=$3
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ks=$4
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vault=$5
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setos_ubuntu() {
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if [ "$localtest" = 1 ]; then
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mirror=$confhome/
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eval ${step}_ks=$confhome/$ks
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else
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if is_in_china; then
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case "$basearch" in
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"x86_64") mirror=https://mirrors.aliyun.com/ubuntu-releases/$releasever/ ;;
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"aarch64") mirror=https://mirrors.aliyun.com/ubuntu-cdimage/releases/$releasever/release/ ;;
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esac
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else
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case "$basearch" in
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"x86_64") mirror=https://releases.ubuntu.com/$releasever/ ;;
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"aarch64") mirror=https://cdimage.ubuntu.com/releases/$releasever/release/ ;;
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esac
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fi
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eval ${step}_ks=$confhome/user-data
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fi
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case "$basearch" in
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"x86_64") arch=amd64 ;;
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"aarch64") arch=arm64 ;;
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esac
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filename=$(curl $mirror | grep -oP "ubuntu-$releasever.*?-live-server-$arch.iso" | head -1)
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eval ${step}_iso=$mirror$filename
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eval ${step}_distro=ubuntu
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}
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setos_rh() {
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if [ "$localtest" = 1 ]; then
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mirror=$confhome/$releasever/
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eval ${step}_ks=$confhome/$ks
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else
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# 甲骨文 arm 1g内存，用 centos 7.9 镜像会 oom 进不了安装界面，所以用7.6
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if [ "$vault" = 1 ]; then
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if is_in_china; then
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[ "$basearch" = "x86_64" ] && dir= || dir=/altarch
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mirror="https://mirrors.aliyun.com/centos-vault$dir/7.6.1810/os/$basearch/"
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else
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[ "$basearch" = "x86_64" ] && dir=centos || dir=altarch
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mirror=http://vault.centos.org/$dir/7.6.1810/os/$basearch/
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fi
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else
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case $distro in
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"centos")
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case $releasever in
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"7") mirrorlist="http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=os" ;;
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"8") mirrorlist="http://mirrorlist.centos.org/?release=8-stream&arch=$basearch&repo=BaseOS" ;;
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"9") mirrorlist="https://mirrors.centos.org/mirrorlist?repo=centos-baseos-9-stream&arch=$basearch" ;;
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esac
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;;
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"alma") mirrorlist="https://mirrors.almalinux.org/mirrorlist/$releasever/baseos" ;;
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"rocky") mirrorlist="https://mirrors.rockylinux.org/mirrorlist?arch=$basearch&repo=BaseOS-$releasever" ;;
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"fedora") mirrorlist="https://mirrors.fedoraproject.org/mirrorlist?arch=$basearch&repo=fedora-$releasever" ;;
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esac
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# rocky/centos9 需要删除第一行注释， alma 需要替换$basearch，anigil 这个源不稳定
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mirror=$(curl -L $mirrorlist | sed "/^#/d" | sed "/anigil/d" | head -1 | sed "s,\$basearch,$basearch,")
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eval "${step}_mirrorlist='${mirrorlist}'"
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fi
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eval ${step}_ks=$confhome/$ks
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fi
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eval ${step}_distro=${distro}
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eval ${step}_vmlinuz=${mirror}images/pxeboot/vmlinuz
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eval ${step}_initrd=${mirror}images/pxeboot/initrd.img
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eval ${step}_squashfs=${mirror}images/install.img
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if [ "$releasever" = 7 ]; then
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eval ${step}_squashfs=${mirror}LiveOS/squashfs.img
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fi
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}
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if [ "$distro" = "ubuntu" ]; then
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setos_ubuntu
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else
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setos_rh
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fi
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}
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if [ "$EUID" -ne 0 ]; then
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echo "Please run as root."
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exit 1
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fi
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opts=$(getopt -a -n $0 --options l --long localtest -- "$@")
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if [ "$?" != 0 ]; then
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usage_and_exit
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fi
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eval set -- "$opts"
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while true; do
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case "$1" in
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-l | --localtest)
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localtest=1
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confhome=$localtest_confhome
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shift
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;;
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--)
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shift
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break
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;;
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*)
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echo "Unexpected option: $1."
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usage_and_exit
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;;
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esac
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done
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# 检查是否为正确的系统名
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for re in \
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"s,.*\b(centos|alma|rocky)(linux)?[ :-]?([789])\b.*,\1:\3,p" \
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"s,.*\b(fedora)(linux)?[ :-]?(3[678])\b.*,\1:\3,p" \
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"s,.*\b(ubuntu)(linux)?[ :-]?(2[02]\.04)\b.*,\1:\3,p"; do
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finalos=$(echo "$@" | tr '[:upper:]' '[:lower:]' | sed -n -E "$re")
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if [ -n "$finalos" ]; then
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break
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fi
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done
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if [ -z "$finalos" ]; then
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echo "Please specify a proper os."
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usage_and_exit
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fi
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# 最小安装的 debian 不包含 curl dmidecode
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install_pkg() {
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pkgs=$1
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for pkg in $pkgs; do
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if ! command -v $pkg; then
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{
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{ apt update && apt install -y $pkgs; } ||
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dnf install -y $pkgs ||
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yum install -y $pkgs ||
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zypper install -y $pkgs ||
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pacman -Syu $pkgs
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} 2>/dev/null
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break
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fi
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done
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}
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2022-09-25 21:57:47 +08:00
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2023-05-03 22:22:21 +08:00
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# 获取内存大小，lsmem最准确但centos7 arm不能用
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# arm 24g dmidecode 显示少了128m
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ram_size=$(lsmem -b | grep 'Total online memory:' | awk '{ print $NF/1024/1024 }')
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if [ -z $ram_size ]; then
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install_pkg dmidecode
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ram_size=$(dmidecode -t 17 | grep "Size.*[GM]B" | awk '{if ($3=="GB") s+=$2*1024; else s+=$2} END {print s}')
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2022-09-25 21:57:47 +08:00
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fi
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2023-05-03 22:22:21 +08:00
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if [ $ram_size -lt 1024 ]; then
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echo 'RAM < 1G. Unsupported.'
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exit 1
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fi
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2022-09-25 21:57:47 +08:00
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2023-05-03 22:22:21 +08:00
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install_pkg curl
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distro=$(echo $finalos | cut -d: -f1)
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releasever=$(echo $finalos | cut -d: -f2)
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basearch=$(uname -m)
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# 以下目标系统需要两步安装
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# ubuntu
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# el8/9/fedora 任何架构 <2g
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# el7 aarch64 <1.5g
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# shellcheck disable=SC2154
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if [ $distro = "ubuntu" ] ||
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{ [ $releasever -ge 8 ] && [ $ram_size -lt 2048 ]; } ||
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{ [ $releasever -eq 7 ] && [ $ram_size -lt 1536 ] && [ $basearch = "aarch64" ]; }; then
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[ $distro = "ubuntu" ] && ks=user-data || ks=ks.cfg
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setos finalos $distro $releasever $ks
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setos nextos centos 7 ks-trans.cfg 1
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else
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setos nextos $distro $releasever ks.cfg
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fi
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2022-09-25 21:57:47 +08:00
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# 下载启动内核
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2023-05-03 22:22:21 +08:00
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# shellcheck disable=SC2154
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{
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cd /
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curl -LO $nextos_vmlinuz
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curl -LO $nextos_initrd
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touch reinstall.mark
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}
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# 转换 finalos_a=1 为 finalos.a=1 ，排除 finalos_mirrorlist
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build_finalos_cmdline() {
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for var in $(compgen -v finalos_); do
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key=${var//_/.}
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[ $key != "finalos.mirrorlist" ] && finalos_cmdline+=" $key=${!var}"
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done
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}
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build_extra_cmdline() {
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extra_cmdline+=" extra.confhome=$confhome"
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if [ "$localtest" = 1 ]; then
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extra_cmdline+=" extra.localtest=$localtest"
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else
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# 指定最终安装系统的 mirrorlist，链接有&，在grub中是特殊字符，所以要加引号
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if [ -n "$finalos_mirrorlist" ]; then
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extra_cmdline+=" extra.mirrorlist='$finalos_mirrorlist'"
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elif [ -n "$nextos_mirrorlist" ]; then
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extra_cmdline+=" extra.mirrorlist='$nextos_mirrorlist'"
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fi
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fi
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}
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2022-09-25 21:57:47 +08:00
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2023-05-03 22:22:21 +08:00
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# arm64 不需要添加 efi 字样
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if [ -d /sys/firmware/efi ] && [ "$basearch" = x86_64 ]; then
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2022-09-25 21:57:47 +08:00
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action='efi'
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fi
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2023-05-03 22:22:21 +08:00
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build_finalos_cmdline
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build_extra_cmdline
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grub_cfg=$(find /boot -type f -name grub.cfg -exec grep -E -l 'menuentry|blscfg' {} \;)
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grub_cfg_dir=$(dirname $grub_cfg)
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2022-09-25 21:57:47 +08:00
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2023-05-03 22:22:21 +08:00
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custom_cfg=$grub_cfg_dir/custom.cfg
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echo $custom_cfg
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# shellcheck disable=SC2154
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cat <<EOF | tee $custom_cfg
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2022-09-25 21:57:47 +08:00
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menuentry "reinstall" {
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2023-05-03 22:22:21 +08:00
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insmod lvm
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2022-09-25 21:57:47 +08:00
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insmod xfs
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2023-05-03 22:22:21 +08:00
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search --no-floppy --file --set=root /reinstall.mark
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linux$action /vmlinuz root=live:$nextos_squashfs inst.ks=$nextos_ks $finalos_cmdline $extra_cmdline
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2022-09-25 21:57:47 +08:00
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initrd$action /initrd.img
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2023-05-03 22:22:21 +08:00
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}
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2022-09-25 21:57:47 +08:00
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EOF
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2023-05-03 22:22:21 +08:00
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$(command -v grub-reboot grub2-reboot) reinstall
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echo "Please reboot to begin the installation."
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