Spotter-VM/_vm.sh

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#!/bin/sh
set -v
# Based on
# https://wiki.alpinelinux.org/wiki/LVM_on_LUKS
# Prerequisites for this script
# setup-interfaces
# ifup eth0
# Ask for passwords
read -sp 'Encryption password:' ENCPWD
echo
# Set up repositories
cat <<EOF >/etc/apk/repositories
http://dl-cdn.alpinelinux.org/alpine/v3.9/main
http://dl-cdn.alpinelinux.org/alpine/v3.9/community
EOF
# Install disk management tools
apk --no-cache add lvm2 cryptsetup e2fsprogs syslinux
# Create disk partitions
cat <<EOF | fdisk /dev/sda
n
p
1
+100m
a
1
n
p
2
t
2
8e
w
EOF
# Set up partition encryption
echo -n "${ENCPWD}" | cryptsetup -q luksFormat /dev/sda2
echo -n "${ENCPWD}" | cryptsetup open --type luks /dev/sda2 system
# Set up LVM
pvcreate /dev/mapper/system
vgcreate vg0 /dev/mapper/system
lvcreate -l 100%FREE vg0 -n root
# Format
mkfs.ext4 -m0 /dev/sda1
mkfs.ext4 -m1 /dev/vg0/root
# Mount
mount -t ext4 /dev/vg0/root /mnt
mkdir /mnt/boot
mount -t ext4 /dev/sda1 /mnt/boot
# Install Alpine linux
setup-disk -m sys /mnt
# Update boot-time volume information
BOOT_UUID=$(blkid /dev/sda1 | cut -d' ' -f2 | tr -d '"')
cat <<EOF >/mnt/etc/fstab
/dev/vg0/root / ext4 rw,noatime,data=ordered 0 1
${BOOT_UUID} /boot ext4 rw,noatime,data=ordered 0 2
/dev/vg0/swap swap swap defaults 0 0
EOF
echo "system /dev/sda2 none luks" >/mnt/etc/crypttab
# Rebuild initfs
sed -i 's/lvm/lvm cryptsetup/' /mnt/etc/mkinitfs/mkinitfs.conf
mkinitfs -c /mnt/etc/mkinitfs/mkinitfs.conf -b /mnt $(ls /mnt/lib/modules)
# Update extlinux (ignore the errors)
sed -i 's/rootfstype=ext4/rootfstype=ext4 cryptroot=\/dev\/sda2 cryptdm=system/' /mnt/etc/update-extlinux.conf
chroot /mnt update-extlinux
sed -i 's/overwrite=1/overwrite=0/' /mnt/etc/update-extlinux.conf
# Set time zone
chroot /mnt setup-timezone -z Europe/Prague
# Install basic system
apk --no-cache add apache2-utils gettext
wget https://dl.dasm.cz/_vm.tar -O - | tar xf - -C /mnt
chroot /mnt apk --no-cache add ca-certificates curl bridge e2fsprogs-extra gettext iptables kbd-misc libressl lxc postfix nginx util-linux acme-sh@vm vmmgr@vm
chroot /mnt newaliases
mkdir /mnt/var/log/lxc
for SERVICE in cgroups consolefont crond iptables networking nginx ntpd postfix swap urandom vmmgr; do
ln -s /etc/init.d/${SERVICE} /mnt/etc/runlevels/boot
done
ADMINPWD=$(htpasswd -bnBC 10 "" "${ENCPWD}" | tr -d ':\n' | sed 's/$2y/$2b/') envsubst </mnt/etc/vmmgr/config.default.json >/mnt/etc/vmmgr/config.json
# Disable root login
sed -i 's/root::/root:!:/' /mnt/etc/shadow
# Cleanup
rm -rf /mnt/root
mkdir /mnt/root
# Install bootloader to MBR
dd bs=440 count=1 conv=notrunc if=/mnt/usr/share/syslinux/mbr.bin of=/dev/sda
# Unmount and shut down
umount /mnt/boot
umount /mnt
vgchange -a n
cryptsetup luksClose system
poweroff