Spotter-VM/alpine.sh

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#!/bin/sh
# Prerequisites
# setup-interfaces
# ifup eth0
# Set up repositories
cat <<EOF >/etc/apk/repositories
http://repository.fit.cvut.cz/mirrors/alpine/v3.7/main
http://repository.fit.cvut.cz/mirrors/alpine/v3.7/community
#http://repository.fit.cvut.cz/mirrors/alpine/edge/main
#http://repository.fit.cvut.cz/mirrors/alpine/edge/community
#http://repository.fit.cvut.cz/mirrors/alpine/edge/testing
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 'password' | cryptsetup -q luksFormat /dev/sda2
echo -n 'password' | cryptsetup open --type luks /dev/sda2 system
# Set up LVM
pvcreate /dev/mapper/system
vgcreate vg0 /dev/mapper/system
lvcreate -L 4G vg0 -n swap
lvcreate -l 100%FREE vg0 -n root
# Format
mkfs.ext4 -m0 /dev/sda1
mkfs.ext4 -m1 /dev/vg0/root
mkswap /dev/vg0/swap
# 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 | awk '{print $2}' | 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
sed -i 's/rootfstype=ext4/rootfstype=ext4 cryptroot=\/dev\/sda2 cryptdm=system/' /mnt/etc/update-extlinux.conf
chroot /mnt update-extlinux
# Set time zone
chroot /mnt setup-timezone -z Europe/Prague
# Set hostname
echo 'vm' >/mnt/etc/hostname
sed -i 's/localhost/vm/' /mnt/etc/network/interfaces
sed -i 's/localhost /vm localhost /' /mnt/etc/hosts
# Enable services on boot
ln -s /etc/init.d/networking /mnt/etc/runlevels/boot
ln -s /etc/init.d/urandom /mnt/etc/runlevels/boot
# 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
swapoff -a
vgchange -a n
cryptsetup luksClose system
poweroff