238 lines
6.4 KiB
Bash
Executable file
238 lines
6.4 KiB
Bash
Executable file
#!/bin/sh
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# Copyright 2015, Timothy Redaelli <tredaelli@archlinux.info>
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License at <http://www.gnu.org/licenses/> for
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# more details.
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set -e
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# Gathering informations about actual environment.
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if command -v wget >/dev/null 2>&1; then
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_download() { wget -O- "$@" ; }
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elif command -v curl >/dev/null 2>&1; then
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_download() { curl -fL "$@" ; }
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else
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echo "This script needs curl or wget" >&2
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exit 2
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fi
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cpu_type=$(uname -m)
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is_openvz() { [ -d /proc/vz -a ! -d /proc/bc ]; }
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download() {
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local path="$1" x=
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shift
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for x in $mirrors; do
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_download "$x/$path" && return 0
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done
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return 1
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}
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download_and_extract_bootstrap() {
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local sha1 filename
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download iso/latest/sha1sums.txt | fgrep "$cpu_type.tar.gz" > "sha1sums.txt"
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read -r sha1 filename < "sha1sums.txt"
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download "iso/latest/$filename" > "$filename"
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sha1sum -c sha1sums.txt || exit 1
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tar -xpzf "$filename"
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rm -f "$filename"
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cp -L /etc/resolv.conf "/root.$cpu_type/etc"
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mount --rbind /dev "/root.$cpu_type/dev"
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mount -t proc proc "/root.$cpu_type/proc"
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mount -t sysfs sys "/root.$cpu_type/sys"
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# FIXME support multiple partitions
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mount --bind / "/root.$cpu_type/mnt"
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findmnt /boot >/dev/null && mount --bind /boot "/root.$cpu_type/mnt/boot"
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# Workaround for Debian
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mkdir -p "/root.$cpu_type/run/shm"
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}
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chroot_exec() {
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chroot "/root.$cpu_type" /bin/bash -c "$*"
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}
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configure_chroot() {
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local m
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for m in $mirrors; do
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echo 'Server = '"$m"'/$repo/os/$arch'
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done >> "/root.$cpu_type/etc/pacman.d/mirrorlist"
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# Install and initialize haveged if needed
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if ! pidof haveged >/dev/null; then
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# Disable signature check, install and launch haveged and re-enable signature checks.
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sed -i.bak "s/^[[:space:]]*SigLevel[[:space:]]*=.*$/SigLevel = Never/" "/root.$cpu_type/etc/pacman.conf"
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chroot_exec 'pacman --noconfirm -Sy haveged && haveged'
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mv "/root.$cpu_type/etc/pacman.conf.bak" "/root.$cpu_type/etc/pacman.conf"
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fi
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chroot_exec 'pacman-key --init && pacman-key --populate archlinux'
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# Generate fstab
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chroot_exec 'genfstab /mnt >> /etc/fstab'
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}
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save_root_pass() {
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grep '^root:' /etc/shadow > "/root.$cpu_type/root.passwd"
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chmod 0600 "/root.$cpu_type/root.passwd"
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}
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download_and_install_busybox() {
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chroot_exec 'pacman --noconfirm -Sy busybox'
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}
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delete_all() {
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# Delete *all* files from /
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find / \( ! -path '/dev/*' -and ! -path '/proc/*' -and ! -path '/sys/*' -and ! -path '/selinux/*' -and ! -path "/root.$cpu_type/*" \) -delete 2>/dev/null || true
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}
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install_packages() {
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local packages="base grub openssh"
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# You can't use chroot_exec here, because the root filesystem was deleted!
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"/root.$cpu_type/usr/bin/busybox" chroot "/root.$cpu_type" /usr/bin/pacstrap -M /mnt $packages
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cp -L "/root.$cpu_type/etc/resolv.conf" /etc
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}
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restore_root_pass() {
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# If the root password is not set, use vps2arch
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if egrep -q '^root:.?:' "/root.$cpu_type/root.passwd"; then
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echo "root:vps2arch" | chpasswd
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else
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sed -i '/^root:/d' /etc/shadow
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cat "/root.$cpu_type/root.passwd" >> /etc/shadow
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fi
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}
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cleanup() {
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mv "/root.$cpu_type/etc/fstab" "/etc/fstab"
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awk "/\/root.$cpu_type/ {print \$2}" /proc/mounts | sort -r | xargs umount -nl || true
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rm -rf "/root.$cpu_type/"
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}
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configure_bootloader() {
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local root_dev=$(findmnt -no SOURCE /) root_devs= tmp= needs_lvm2=0
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case $root_dev in
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/dev/mapper/*) needs_lvm2=1 ;;
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esac
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# If you are still using eth* as interface name, disable "strange" ifnames
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if grep -q '^[[:space:]]*eth' /proc/net/dev; then
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sed -i.bak 's/GRUB_CMDLINE_LINUX_DEFAULT="/&net.ifnames=0 /' /etc/default/grub
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fi
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if [ $needs_lvm2 -eq 1 ]; then
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local vg
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# Some distro doesn't use lvmetad by default
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sed -i.bak 's/use_lvmetad = 1/use_lvmetad = 0/g' /etc/lvm/lvm.conf
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vg=$(lvs --noheadings $root_dev | awk '{print $2}')
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root_dev=$(pvs --noheadings | awk -v vg="$vg" '($2 == vg) { print $1 }')
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fi
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for root_dev in $root_dev; do
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tmp=$(lsblk -npsro NAME "$root_dev" | tail -n1)
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case " $root_devs " in
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*" $tmp "*) ;;
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*) root_devs="${root_devs:+$root_devs }$tmp" ;;
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esac
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done
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grub-mkconfig > /boot/grub/grub.cfg
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for root_dev in $root_devs; do
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grub-install --target=i386-pc --recheck --force "$root_dev"
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done
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if [ $needs_lvm2 -eq 1 ]; then
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mv /etc/lvm/lvm.conf.bak /etc/lvm/lvm.conf
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sed -i '/HOOKS/s/block/& lvm2/' /etc/mkinitcpio.conf
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mkinitcpio -p linux
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fi
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}
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configure_network() {
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local gateway dev ip
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read -r _ _ gateway _ dev _ <<-EOF
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$(ip route show 0.0.0.0/0)
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EOF
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ip=$(ip addr show dev "$dev" | awk '($1 == "inet") { print $2 }')
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cat > /etc/systemd/network/default.network <<-EOF
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[Match]
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Name=$dev
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[Address]
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Address=$ip
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[Route]
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Gateway=$gateway
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EOF
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systemctl enable systemd-networkd sshd
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}
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finalize() {
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cat <<-EOF
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Hi,
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your VM has successfully been reimaged with Arch Linux.
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This script configured grub as bootloader and systemd-networkd for networking.
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When you are finished with your post-installation, you'll need to reboot the VM the rough way:
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# sync ; reboot -f
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Then you'll be able to connect to your VM using SSH and to login using your old root password (or "vps2arch" if you didn't have a root password).
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You'll need to configure your mirrors in order to use pacman, please see https://wiki.archlinux.org/index.php/Mirrors
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EOF
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}
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mirrors=
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while getopts ":m:h" opt; do
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case $opt in
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m)
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mirrors="${mirrors:+$mirrors }$OPTARG"
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;;
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h)
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cat <<-EOF
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usage: ${0##*/} [options]
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Options:
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-m mirror Use the provided mirror (you can specify this option more than once).
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-h Print this help message
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EOF
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exit 0
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;;
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:)
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printf "%s: option requires an argument -- '%s'\n" "${0##*/}" "$OPTARG" >&2
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exit 1
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;;
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?)
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printf "%s: invalid option -- '%s'\n" "${0##*/}" "$OPTARG" >&2
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exit 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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: ${mirrors:="http://mirror.rackspace.com/archlinux http://dgix.ru/mirrors/archlinux"}
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cd /
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download_and_extract_bootstrap
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configure_chroot
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save_root_pass
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download_and_install_busybox
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delete_all
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install_packages
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restore_root_pass
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cleanup
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configure_bootloader
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configure_network
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finalize
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