mirror of
https://github.com/BlackLight/vmctl.git
synced 2024-05-23 15:12:32 +02:00
Fabio Manganiello
9daa3907a9
- Project renamed to `vmctl` - Using a single `vmctl` executable script (it makes the installation process trivial) - Better documentation for `vmctl install`
446 lines
14 KiB
Bash
Executable file
446 lines
14 KiB
Bash
Executable file
#!/bin/bash
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#########################
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# Shared constants
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export GREEN='\033[0;32m'
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export RED='\033[0;31m'
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export WHITE='\033[0;37m'
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export NORMAL='\033[0m'
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#########################
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############################################
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# Default values for configuration variables
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export default_imgfile=arch.img
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export default_architecture=x86_64
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export default_disk_size=8G
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export default_memory=2048
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export default_hostname=qemu
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export default_root_password=root
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export default_username=user
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export default_user_password=password
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export default_timezone=UTC
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export default_locale=en_US.UTF-8
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export default_img_download_page='http://mirror.cj2.nl/archlinux/iso/latest/'
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export isofile=archlinux-latest.iso
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############################################
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################
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# install script
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# Shared variables
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imgfile=
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architecture=
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disk_size=
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memory=
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hostname=
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root_password=
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username=
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user_password=
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timezone=
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locale="$default_locale"
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img_download_page="$default_img_download_page"
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function install_usage() {
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echo "Install an Arch Linux system on a QEMU disk image"
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echo
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echo "Usage: $(basename "$0") install [-o <output-disk-image>] [-a <architecture>] [-s <disk-size>]"
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echo -e "\t[-m <memory>] [-h <hostname>] [-P <root-password>] [-u <non-root-username>]"
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echo -e "\t[-p <non-root-user-password>] [-z <timezone>] [-l <locale>] [-M <arch-mirror-url>]"
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echo
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echo -e "-o\t<output-disk-image>\t\tPath of the output disk image (default: ./arch.img)"
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echo -e "-a\t<architecture>\t\t\tTarget architecture (default: x86_64)"
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echo -e "-s\t<disk-size>\t\t\tDisk size (default: 8G)"
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echo -e "-m\t<memory>\t\t\tRAM size in KB (default: 2048)"
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echo -e "-h\t<hostname>\t\t\tVM hostname (default: qemu)"
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echo -e "-P\t<root-password>\t\t\tRoot password. If not specified it will be prompted"
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echo -e "-u\t<non-root-username>\t\tUsername for the main non-root user"
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echo -e "-p\t<non-root-user-password>\tPassword for the non-root user. If not specified it will be prompted"
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echo -e "-z\t<timezone>\t\t\tSystem timezone (default: UTC)"
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echo -e "-l\t<locale>\t\t\tSystem locale (default: en_US.UTF-8)"
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echo -e "-M\t<arch-mirror-url>\t\tArch Linux download mirror URL (default: http://mirror.cj2.nl/archlinux/iso/latest/)"
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echo -e "\t\t\t\t\tConsult https://archlinux.org/download/ for a full list of the available download mirrors."
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echo
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echo "If you want to install an extra list of packages besides the default ones, then"
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echo "specify them in a file named PKGLIST in the same directory as the disk image file."
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echo
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echo "If you want to run a custom post-installation script after the core system has been"
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echo "installed, then create a custom script named post-install.sh in the same directory as"
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echo "the disk image file".
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exit 1
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}
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function download_latest_arch_iso() {
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latest_iso=$(
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curl -s "$img_download_page" |
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grep -e '<a href="archlinux-.*\.iso">' |
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head -1 |
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sed -r -e 's/^.*<a href="(archlinux-.*\.iso)">.*/\1/'
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)
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if [ ! -f "$latest_iso" ]; then
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echo -e "${GREEN}Downloading the latest Arch Linux ISO image${NORMAL}"
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rm -f archlinux*.iso
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curl -o "${latest_iso}" "${img_download_page}/${latest_iso}"
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ln -sf "$latest_iso" "$isofile"
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else
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echo -e "${GREEN}Latest Arch Linux image already downloaded${NORMAL}"
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fi
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}
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function create_disk_image() {
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# Create a backing COW image
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# qemu-img create -o backing_file="$imgfile",backing_fmt=raw -f qcow2 img1.cow
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if [ ! -f "$imgfile" ]; then
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echo -e "${GREEN}Creating base disk image${NORMAL}"
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qemu-img create -f raw "$imgfile" $disk_size
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else
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echo -e "${RED}The base disk image file $imgfile already exists.${NORMAL}"
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echo -e "${RED}Remove it and re-run this script if you intend to run a new fresh installation.${NORMAL}"
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fi
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}
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function _get_ssh_key_name() {
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keyfiles=$(cat <<EOF
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id_rsa
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id_dsa
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id_ecdsa
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id_ed25519
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id_xmss
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EOF
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)
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while IFS= read -r keyfile; do
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k="$HOME/.ssh/$keyfile"
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if [ -f "$k" ]; then
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echo "$k"
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return
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fi
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done <<< "$keyfiles"
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echo -e "${RED}Can't find a valid SSH key under $HOME/.ssh${NORMAL}"
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exit 1
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}
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function install_os() {
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ssh_keyfile="$(_get_ssh_key_name)"
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ssh_pubkey="$(cat "$ssh_keyfile.pub")"
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ssh_privkey="$(cat "$ssh_keyfile")"
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imgdir="$(cd "$(dirname "$imgfile")" && pwd)"
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logfile="$imgdir/install.log"
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pkgfile="$imgdir/PKGLIST"
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post_install_script="$imgdir/post-install.sh"
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post_install=
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packages=$(cat <<EOF
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sudo
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curl
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wget
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dhcpcd
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net-tools
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netctl
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openssh
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EOF
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)
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if [ -f "$pkgfile" ]; then
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packages="$packages
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$(cat "$pkgfile")"
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fi
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[ -f "$post_install_script" ] && post_install="$(cat "$post_install_script")"
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echo -e "${GREEN}Installing base operating system${NORMAL}"
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echo -e "\tISO image: $isofile"
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echo -e "\tDisk file: $imgfile"
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echo -e "\tLog file: $logfile"
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echo "--- Log started at $(date)" > "$logfile"
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expect <<EOF | tee -a "$logfile"
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set prompt "*@archiso*~*#* "
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set chroot_prompt "*root@archiso* "
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set timeout -1
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spawn qemu-system-$architecture \
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-cdrom "$isofile" \
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-boot d \
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-cpu host \
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-enable-kvm \
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-m $memory \
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-smp 2 \
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-nographic \
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-drive file=$imgfile,format=raw
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match_max 100000
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# Pass the console boot options
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# and wait for the system to boot
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expect "*Arch Linux install*"
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send -- "\t"
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expect "*archisobasedir*"
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send -- " console=ttyS0,38400\r"
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expect "archiso login: "
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send -- "root\r"
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expect \$prompt
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# Partition the disk
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send -- "fdisk /dev/sda\r"
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expect "Command (m for help): "
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send -- "n\r"
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expect "Select (default p): "
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send -- "p\r"
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expect "Partition number (1-4, default 1): "
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send -- "\r"
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expect "First sector*: "
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send -- "\r"
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expect "Last sector*: "
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send -- "\r"
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expect "Command (m for help): "
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send -- "a\r"
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expect "Command (m for help): "
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send -- "w\r"
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expect \$prompt
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# Create and mount the filesystem
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send -- "mkfs.ext4 /dev/sda1\r"
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expect \$prompt
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send -- "mount /dev/sda1 /mnt\r"
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expect \$prompt
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# Install the system
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send -- "pacstrap /mnt base linux linux-firmware archlinux-keyring\r"
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expect \$prompt
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# Generate the fstab file
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send -- "genfstab -U /mnt >> /mnt/etc/fstab\r"
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expect \$prompt
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# chroot to the newly installed system
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send -- "arch-chroot /mnt\r"
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expect \$chroot_prompt
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# Set the timezone and sync the clock
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send -- "ln -sf /usr/share/zoneinfo/$timezone /etc/localtime\r"
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expect \$chroot_prompt
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send -- "hwclock --systohc\r"
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expect \$chroot_prompt
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# Configure localization
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send -- "echo $locale UTF-8 >> /etc/locale.gen\r"
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expect \$chroot_prompt
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send -- "locale-gen\r"
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expect \$chroot_prompt
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send -- "echo LANG=en_US.UTF-8 > /etc/locale.conf\r"
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expect \$chroot_prompt
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# Set the hostname
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send -- "echo $hostname > /etc/hostname\r"
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expect \$chroot_prompt
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# Generate /etc/hosts
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send -- "echo -e '127.0.0.1 localhost\\n::1 localhost' >> /etc/hosts\r"
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expect \$chroot_prompt
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# Generate the initpcio
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send -- "mkinitcpio -P\r"
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expect \$chroot_prompt
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# Update the keyring
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# This may currently currently take a long time
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# see https://www.reddit.com/r/archlinux/comments/rbjbcr/pacman_keyring_update_taking_too_long/
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send -- "pacman-key --init\r"
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expect \$chroot_prompt
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send -- "pacman-key --populate archlinux\r"
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expect \$chroot_prompt
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send -- "pacman-key --refresh-keys\r"
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expect \$chroot_prompt
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# As a workaround, you can temporarily disable signature check on pacman.conf
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#send -- "cp /etc/pacman.conf /etc/pacman.conf.orig\r"
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#expect \$chroot_prompt
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#send -- "sed -i /etc/pacman.conf -r -e 's/^(SigLevel\\\\s*=\\\\s*).*$/\\\\1 Never/g'\r"
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#expect \$chroot_prompt
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# Install extra packages
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send -- {echo "$packages" | pacman -S --noconfirm -}
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send -- "\r"
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expect \$chroot_prompt
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# Install syslinux
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send -- "pacman -S --noconfirm syslinux\r"
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expect \$chroot_prompt
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send -- "syslinux-install_update -i -a -m\r"
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#expect \$chroot_prompt
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#send -- "dd bs=440 count=1 conv=notrunc if=/usr/lib/syslinux/bios/mbr.bin of=/dev/sda\r"
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expect \$chroot_prompt
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send -- "sed -i /boot/syslinux/syslinux.cfg -e '1i SERIAL 0 115200'\r"
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expect \$chroot_prompt
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send -- "sed -i /boot/syslinux/syslinux.cfg -e 's|APPEND root=/dev/sda3|APPEND console=tty0 console=ttyS0,115200 root=/dev/sda1|g'\r"
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expect \$chroot_prompt
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# Restore the original pacman.conf
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send -- "mv /etc/pacman.conf.orig /etc/pacman.conf\r"
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expect \$chroot_prompt
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# Set the root password
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send -- "passwd\r"
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expect "New password: "
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send -- "$root_password\r"
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expect "Retype new password: "
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send -- "$root_password\r"
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expect \$chroot_prompt
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# Create a non-admin user
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send -- "useradd -d /home/$username -m $username\r"
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expect \$chroot_prompt
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send -- "passwd $username\r"
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expect "New password: "
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send -- "$user_password\r"
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expect "Retype new password: "
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send -- "$user_password\r"
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expect \$chroot_prompt
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# Enable the dhcpcd service
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send -- "ln -sf /usr/lib/systemd/system/dhcpcd.service /etc/systemd/system/multi-user.target.wants/dhcpcd.service\r"
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expect \$chroot_prompt
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# Enable and configure the SSH daemon
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send -- "ln -sf /usr/lib/systemd/system/sshd.service /etc/systemd/system/multi-user.target.wants/sshd.service\r"
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expect \$chroot_prompt
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send -- "cat <<_EOF_ >> /etc/ssh/sshd_config
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RSAAuthentication yes
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PubkeyAuthentication yes
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_EOF_
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"
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expect \$chroot_prompt
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# Copy the user SSH key
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send -- "mkdir -p /home/$username/.ssh\r"
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expect \$chroot_prompt
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send -- {echo "$ssh_pubkey" >> "/home/$username/.ssh/authorized_keys"}
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send -- "\r"
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expect \$chroot_prompt
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send -- {echo "$ssh_privkey" > "/home/$username/.ssh/$(basename $ssh_keyfile)"}
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send -- "\r"
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expect \$chroot_prompt
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send -- {chmod 0600 "/home/$username/.ssh/$(basename $ssh_keyfile)"}
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send -- "\r"
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expect \$chroot_prompt
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send -- {echo "$ssh_pubkey" > "/home/$username/.ssh/$(basename $ssh_keyfile).pub"}
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send -- "\r"
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expect \$chroot_prompt
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send -- {chown -R $username "/home/$username/.ssh"}
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send -- "\r"
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expect \$chroot_prompt
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# Run any post-install scripts
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send -- {$post_install}
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send -- "\r"
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expect \$chroot_prompt
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# Clear the pacman cache
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send -- "rm -rf /var/cache/pacman/pkg/*\r"
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expect \$chroot_prompt
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# Exit and shutdown
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send -- "exit\r"
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expect \$prompt
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send -- "umount /mnt\r"
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expect \$prompt
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send -- "shutdown -h now\r"
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expect eof
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system {echo -e "\n${GREEN}Arch Linux system installed under ${imgfile}${NORMAL}"}
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EOF
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echo "--- Log closed at $(date)" >> "$logfile"
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}
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function install() {
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optstring=':o:a:s:m:h:P:u:p:z:l:M:'
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[[ "$1" == '--help' ]] && install_usage
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while getopts ${optstring} arg; do
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case ${arg} in
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o) imgfile="${OPTARG}";;
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a) architecture="${OPTARG}";;
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s) disk_size="${OPTARG}";;
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m) memory="${OPTARG}";;
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h) hostname="${OPTARG}";;
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P) root_password="${OPTARG}";;
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u) username="${OPTARG}";;
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p) user_password="${OPTARG}";;
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z) timezone="${OPTARG}";;
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l) locale="${OPTARG}";;
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M) img_download_page="${OPTARG}";;
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?)
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echo "Invalid option: -${OPTARG}" >&2
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install_usage;;
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esac
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done
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[ -z "$imgfile" ] && read -p "Output disk image file [$default_imgfile]: " imgfile
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[ -z "$architecture" ] && read -p "Architecture [$default_architecture]: " architecture
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[ -z "$disk_size" ] && read -p "Disk size [$default_disk_size]: " disk_size
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[ -z "$memory" ] && read -p "Memory in KB [$default_memory]: " memory
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[ -z "$hostname" ] && read -p "Hostname [$default_hostname]: " hostname
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[ -z "$root_password" ] && read -sp "Root password [$default_root_password]: " root_password && echo
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[ -z "$username" ] && read -p "Non-admin username [$default_username]: " username
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[ -z "$user_password" ] && read -sp "Non-admin user password [$default_user_password]: " user_password && echo
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[ -z "$timezone" ] && read -p "Timezone [$default_timezone]: " timezone
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[ -z "$locale" ] && read -p "Locale [$default_locale]: " locale
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for var in imgfile \
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architecture \
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disk_size \
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memory \
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hostname \
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root_password \
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username \
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user_password \
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timezone \
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locale
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do
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default_var=default_$var
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[ -z "${!var}" ] && declare ${var}=${!default_var}
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export $var
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done
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download_latest_arch_iso
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create_disk_image
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install_os
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}
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################
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##################
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# Main script
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function usage() {
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actions=(install)
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cat <<EOF
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Usage: $(basename "$0") <action>
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Run $(basename "$0") <action> --help for more details.
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Available actions:
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$actions
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EOF
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exit 1
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}
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function main() {
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action=$1
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shift
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case "$action" in
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install) install $*;;
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*) usage;;
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esac
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}
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main $*
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##################
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