initial commit
This commit is contained in:
commit
5b3e79c671
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#!/usr/bin/sh -eu
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usage() {
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echo "usage: mkimg-archlinux --name NAME --disk SIZE --ipv4 IPV4 --ipv6 IPV6"
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exit 1
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}
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# TODO make a real cli
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NAME="cosmos"
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DISK_SIZE="10G"
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IPV4="10.238.2.3"
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IPV6="2a00:5881:4008:46ff::203"
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IPV4_GATEWAY="10.238.2.254"
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IPV6_GATEWAY="2a00:5881:4008:46ff::2ff"
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fsroot="/tmp/$NAME"
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unmount() {
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echo "=> INFO: unmounting root partition"
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while mountpoint "$fsroot" > /dev/null 2>&1; do
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if ! umount -R "$fsroot" > /dev/null 2>&1; then
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echo -n "."
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sleep 5
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fi
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done
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rm -df "$fsroot"
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}
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disconnect() {
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echo "=> INFO: disconnecting disk image"
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qemu-nbd --disconnect /dev/nbd0
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sleep 2
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rmmod nbd
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}
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cleanup() {
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echo "=> ERROR: cleaning up"
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unmount
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disconnect
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}
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# run command as root inside the chroot
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run_cmd() {
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local cmd="$@"
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echo "=> CHROOT: $cmd"
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chroot "$fsroot" /bin/bash -c "$cmd"
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}
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## DISK SETUP ##
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echo "=> INFO: creating disk image"
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mkdir -p "/srv/vm/$NAME"
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qemu-img create -f qcow2 "/srv/vm/$NAME/disk.qcow2" $DISK_SIZE
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chown qemu:qemu "/srv/vm/$NAME/disk.qcow2"
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echo "=> INFO: connecting disk image"
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modprobe nbd
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qemu-nbd --connect=/dev/nbd0 "/srv/vm/$NAME/disk.qcow2"
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trap cleanup EXIT
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echo "=> INFO: creating root partition"
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sfdisk /dev/nbd0 << EOF
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label: dos
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,,linux,*
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EOF
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mkfs.ext4 /dev/nbd0p1
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echo "=> INFO: mounting root partition"
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mkdir "$fsroot"
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mount /dev/nbd0p1 "$fsroot"
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## INSTALLATION ##
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echo "=> INFO: installing base packages"
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pacstrap -K "$fsroot" base linux mkinitcpio syslinux neovim zsh openntpd
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echo "=> INFO: writing mirrorlist"
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reflector --country fr,de --latest 20 --protocol https --sort rate > "$fsroot/etc/pacman.d/mirrorlist"
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echo "=> INFO: writing fstab"
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cat > "$fsroot/etc/fstab" << EOF
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/dev/vda1 / ext4 rw,relatime 0 1
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EOF
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echo "=> INFO: writing hostname"
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echo $NAME > "$fsroot/etc/hostname"
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echo "=> INFO: configuring locales"
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sed -i "s/#en_US.UTF-8/en_US.UTF-8/" -i "$fsroot/etc/locale.gen"
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run_cmd locale-gen
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echo "=> INFO: configuring network"
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cat > "$fsroot/etc/resolv.conf" << EOF
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nameserver $IPV4_GATEWAY
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EOF
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cat > "$fsroot/etc/systemd/network/radon.network" << EOF
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[Match]
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Type=ether
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[Network]
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Address=$IPV4
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Address=$IPV6
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[Route]
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Gateway=$IPV4_GATEWAY
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GatewayOnLink=true
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Destination=0.0.0.0/0
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[Route]
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Gateway=$IPV6_GATEWAY
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GatewayOnLink=true
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Destination=::/0
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EOF
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mount -t proc /proc "$fsroot/proc"
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mount -t sysfs /sys "$fsroot/sys"
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mount --rbind /dev "$fsroot/dev"
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mount --make-rslave "$fsroot"
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run_cmd systemctl enable systemd-networkd
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run_cmd systemctl enable openntpd
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echo "=> INFO: configuring bootloader"
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mkdir -p "$fsroot/boot/syslinux"
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cat > "$fsroot/boot/syslinux/syslinux.cfg" << EOF
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DEFAULT arch
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PROMPT 0
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TIMEOUT 0
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LABEL arch
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LINUX ../vmlinuz-linux
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APPEND root=/dev/vda1 rw earlyprintk=ttyS0 console=ttyS0
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INITRD ../initramfs-linux.img
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EOF
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cp "$fsroot/usr/lib/syslinux/bios/ldlinux.c32" "$fsroot/boot/syslinux/"
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run_cmd extlinux --install /boot/syslinux
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cp "$fsroot/usr/lib/syslinux/bios/mbr.bin" /tmp/mbr.bin
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echo "=> INFO: configuring initramfs"
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cat > "$fsroot/etc/mkinitcpio.conf" << EOF
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MODULES=(virtio virtio_pci virtio_blk ext4)
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BINARIES=()
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FILES=()
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HOOKS=(base)
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EOF
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sed -i "s/PRESETS=('default' 'fallback')/PRESETS=('default')/" "$fsroot/etc/mkinitcpio.d/linux.preset"
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rm "$fsroot/boot/initramfs-linux-fallback.img"
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run_cmd mkinitcpio -P
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#echo "=> INFO: configuring zsh"
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#
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#cat > "$fsroot/root/.zshrc" << EOF
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#HISTFILE=~/.histfile
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#HISTSIZE=10000
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#SAVEHIST=10000
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#setopt appendhistory nomatch
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#
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#bindkey -e
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#
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#zstyle :compinstall filename '/root/.zshrc'
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#autoload -Uz compinit
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#compinit
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#
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#PS1='[%n@%m %~]$ '
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#export EDITOR=nvim
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#
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#term-resize() {
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# if [[ -t 0 && $# -eq 0 ]]; then
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# local IFS='[;' escape geometry x y
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# echo -ne '\e7\e[r\e[999;999H\e[6n\e8'
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# read -t 5 -sd R escape geometry || {
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# echo unsupported terminal emulator. >&2
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# return 1
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# }
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# x="${geometry##*;}" y="${geometry%%;*}"
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# if [[ ${COLUMNS} -eq "${x}" && ${LINES} -eq "${y}" ]]; then
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# echo "${TERM} ${x}x${y}"
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# elif [[ "$x" -gt 0 && "$y" -gt 0 ]]; then
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# echo "${COLUMNS}x${LINES} -> ${x}x${y}"
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# stty cols ${x} rows ${y}
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# else
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# echo unsupported terminal emulator. >&2
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# return 1
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# fi
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# else
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# echo 'Usage: term-resize'
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# fi
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#}
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#EOF
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echo "=> INFO: setting root password"
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passwd=$(openssl rand -base64 12)
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echo "root:$passwd" | run_cmd chpasswd
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echo "=> INFO: setting qemu config file"
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cat > "/srv/vm/$NAME/config" << EOF
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NCPU=2
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MEMORY=2048M
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EOF
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## WRAPPING UP
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trap - EXIT
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unmount
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echo "=> INFO: writing the MBR"
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dd bs=440 count=1 conv=notrunc if=/tmp/mbr.bin of=/dev/nbd0
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rm /tmp/mbr.bin
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disconnect
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echo "=> INFO: root password: $passwd"
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@ -0,0 +1,73 @@
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#!/usr/bin/sh
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### CONFIG
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VG_NAME=nvme # volume group of the target
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ORIG_NAME=system # logical volume name to backup
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SNAP_NAME=tmp-snap # name of temporary snapshot
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BORG_REPO=/data/backup/radon-host # path to borg repository
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### SETUP
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TMPDIR=$(mktemp -d)
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info() { printf "%s\n" "$*" >&2; }
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cleanup() {
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cd /
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umount --force --quiet "/dev/$VG_NAME/$SNAP_NAME"
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rm --recursive --force "$TMPDIR"
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lvremove --force "$VG_NAME/$SNAP_NAME"
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}
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trap 'info "Backup interrupted"; cleanup; exit 2' INT TERM
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### THE ACTUAL THING
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info "Checking for old snapshot"
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if lvs --options lv_name "$VG_NAME" | grep --quiet "$SNAP_NAME"; then
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cleanup
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fi
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info "Creating temporary snapshot"
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lvcreate --size 1G --snapshot --name "$SNAP_NAME" "$VG_NAME/$ORIG_NAME"
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mount "/dev/$VG_NAME/$SNAP_NAME" "$TMPDIR"
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info "Starting backup"
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cd "$TMPDIR"
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borg create \
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--verbose \
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--stats \
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--show-rc \
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--compression zstd,1 \
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--exclude-caches \
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--exclude 'archive' \
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--exclude 'backup' \
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--exclude 'content' \
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--exclude 'dev' \
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--exclude 'mnt' \
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--exclude 'proc' \
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--exclude 'run' \
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--exclude 'sys' \
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--exclude 'tmp' \
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--exclude 'var/tmp/*' \
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--exclude 'var/cache/*' \
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"$BORG_REPO"::'system-{now:%Y-%m-%d}' \
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.
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info "Pruning repository"
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borg prune \
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--list \
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--glob-archives 'system-*' \
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--show-rc \
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--keep-daily 7 \
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--keep-weekly 2 \
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--keep-monthly 10 \
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"$BORG_REPO"
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info "Compacting repository"
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borg compact "$BORG_REPO"
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info "Removing snapshot"
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cleanup
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@ -0,0 +1,143 @@
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#!/bin/bash -eu
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QEMU=/usr/bin/qemu-system-x86_64
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VIRTIOFSD=/usr/lib/qemu/virtiofsd
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SOCAT=/usr/bin/socat
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IP=/usr/bin/ip
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CFG_BASE=/srv/vm
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RUN_BASE=/run/vm
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check_vm() {
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if [[ ! -e $MONITOR_PATH ]]; then
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echo "error: monitor socket not found, is VM '$VM_NAME' running?"
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exit 1
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fi
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}
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monitor_cmd() {
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check_vm
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echo $1 | $SOCAT - unix-connect:$MONITOR_PATH
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}
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do_start() {
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mkdir -p /dev/hugepages/qemu $RUN_DIR
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chown qemu:qemu /dev/hugepages/qemu $RUN_DIR
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# read config variables
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QEMU_EXTRA_ARGS=""
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FS_SHARE=""
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MEM_OPTS=""
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. $CFG_DIR/config
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ID_HEX="$(printf %02x $VM_ID)"
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ID_DEC="$(printf %03d $VM_ID)"
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MAC_ADDR="52:54:00:00:00:$ID_HEX"
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IPV4_ADDR="10.238.2.$ID_DEC"
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IPV6_ADDR="2a00:5881:4008:46ff::2$ID_HEX"
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# setup network
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$IP tuntap add dev $IFNAME mode tap group qemu
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$IP link set dev $IFNAME up
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$IP address add 10.238.1.1 dev $IFNAME
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$IP address add 2a00:5881:4008:46ff::101 dev $IFNAME
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$IP route add $IPV4_ADDR dev $IFNAME
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$IP route add $IPV6_ADDR dev $IFNAME
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# setup virtiofs daemon and opts
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if [ ! -z $FS_SHARE ]; then
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VHOST_PATH=$RUN_DIR/vhost-fs.sock
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QEMU_EXTRA_ARGS="$QEMU_EXTRA_ARGS -chardev socket,id=vhost0,path=$VHOST_PATH"
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QEMU_EXTRA_ARGS="$QEMU_EXTRA_ARGS -device vhost-user-fs-pci,queue-size=1024,chardev=vhost0,tag=fs0"
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MEM_OPTS=",share=on"
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$VIRTIOFSD --socket-path=$VHOST_PATH --socket-group=qemu -o source=$FS_SHARE -o cache=always &
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fi
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exec setpriv --reuid=qemu --regid=qemu --init-groups --inh-caps=-all --reset-env \
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$QEMU -nodefaults -no-user-config -nographic -sandbox on -enable-kvm \
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-machine pc -cpu host -smp $NCPU -m $MEMORY \
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-object memory-backend-file,id=mem,size=$MEMORY,mem-path=/dev/hugepages/qemu$MEM_OPTS -numa node,memdev=mem \
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-monitor unix:$MONITOR_PATH,server=on,wait=off \
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-serial unix:$CONSOLE_PATH,server=on,wait=off \
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-drive file=$DISK_IMG,format=qcow2,id=disk0,if=none \
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-device virtio-blk-pci,drive=disk0 \
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-netdev tap,id=net0,ifname=$IFNAME,script=no,downscript=no,vhost=on \
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-device virtio-net-pci,mac=$MAC_ADDR,netdev=net0 \
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$QEMU_EXTRA_ARGS
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}
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do_console() {
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check_vm
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echo "info: connecting to console: '$VM_NAME'"
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echo "info: press ctrl-o to exit"
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exec $SOCAT -,escape=0x0f,raw,echo=0 unix-connect:$CONSOLE_PATH
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}
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do_monitor() {
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check_vm
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echo "info: connecting to monitor: '$VM_NAME'"
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echo "info: press ctrl-c to exit"
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exec $SOCAT readline unix-connect:$MONITOR_PATH
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}
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do_stop() {
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monitor_cmd system_powerdown
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$IP link del $IFNAME
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}
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do_mount() {
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fsroot="/tmp/$VM_NAME"
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modprobe nbd
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qemu-nbd --connect=/dev/nbd0 "$DISK_IMG"
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mkdir "$fsroot"
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mount /dev/nbd0p1 "$fsroot"
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mount -t proc /proc "$fsroot/proc"
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mount -t sysfs /sys "$fsroot/sys"
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mount --rbind /dev "$fsroot/dev"
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mount --make-rslave "$fsroot"
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echo "info: mounted VM '$VM_NAME' rootfs at '/tmp/$VM_NAME'"
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}
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do_umount() {
|
||||
if ! mountpoint "/tmp/$VM_NAME" > /dev/null 2>&1; then
|
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echo "error: mountpoint not found, is VM '$VM_NAME' mounted?"
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exit 1
|
||||
fi
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||||
|
||||
umount -R "/tmp/$VM_NAME"
|
||||
rm -df "/tmp/$VM_NAME"
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|
||||
qemu-nbd --disconnect /dev/nbd0 > /dev/null
|
||||
rmmod nbd
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||||
|
||||
echo "info: unmounted VM '$VM_NAME' successfully"
|
||||
}
|
||||
|
||||
usage() {
|
||||
echo "usage: vm-mgmt ( start | stop | reboot | console | monitor | mount | umount ) NAME"
|
||||
exit 1
|
||||
}
|
||||
|
||||
test $# -lt 2 && usage
|
||||
VM_NAME=$2
|
||||
|
||||
RUN_DIR=$RUN_BASE/$VM_NAME
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||||
CFG_DIR=$CFG_BASE/$VM_NAME
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||||
|
||||
CONSOLE_PATH=$RUN_DIR/console.sock
|
||||
MONITOR_PATH=$RUN_DIR/monitor.sock
|
||||
DISK_IMG=$CFG_DIR/disk.qcow2
|
||||
IFNAME=vm-$VM_NAME
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||||
|
||||
case $1 in
|
||||
start) do_start;;
|
||||
stop) do_stop;;
|
||||
reboot) monitor_cmd system_reset;;
|
||||
console) do_console;;
|
||||
monitor) do_monitor;;
|
||||
mount) do_mount;;
|
||||
umount) do_umount;;
|
||||
*) usage;;
|
||||
esac
|
||||
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