137 lines
3.2 KiB
Bash
Executable File
137 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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if [ $# -ne 2 ]; then
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echo "$0 disk ssh-keyfile"
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echo " disk: which disk to install to"
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echo " ssh-keyfile: ssh keys to add into the image"
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exit 1
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fi
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set -e
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set -x
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DISK=$1; shift
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SSH_KEYS=$1; shift
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MAJOR_VERSION=3.14
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MINOR_VERSION=0
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IMAGE=alpine-minirootfs-$MAJOR_VERSION.$MINOR_VERSION-x86_64.tar.gz
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RESOLVCONF=/etc/resolv.conf
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working_directory=$(pwd -P)
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rootfs_tmpdir=$(mktemp -d)
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rootfs_url="http://dl-cdn.alpinelinux.org/alpine/v$MAJOR_VERSION/releases/x86_64/$IMAGE"
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case $DISK in
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/dev/sd*)
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partition=${DISK}1
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;;
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/dev/mmcblk*|/dev/nvme*)
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partition=${DISK}p1
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;;
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*)
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echo "Unsupported disk - edit this script" >&2
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exit 1
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;;
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esac
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run_root () {
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sudo chroot $rootfs_tmpdir /usr/bin/env \
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PATH=/sbin:/bin:/usr/sbin:/usr/bin \
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/bin/sh -c "$*"
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}
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wget -c "$rootfs_url" -O "$IMAGE"
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# Clean the first 2M - getting rid of old things
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# in the gap and also the paritition table
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dd if=/dev/zero of=${DISK} bs=1M count=2
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# Partition disk with 1 Linux partition
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sudo sfdisk "$DISK" <<EOF
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label: dos
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,,L
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EOF
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# For creation, if an existing filesystem is on the partitions
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sudo mkfs.ext4 -F ${partition}
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sudo mount ${partition} $rootfs_tmpdir
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# keep right permissions, use sudo
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sudo tar xf $IMAGE -C $rootfs_tmpdir
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# These are required by grub-install
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# And also for generating grub config that contains rootfstype
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for dir in dev proc sys; do
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sudo mount --bind /${dir} ${rootfs_tmpdir}/${dir}
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done
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# Add SSH keys
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run_root mkdir -p root/.ssh
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sudo cp $SSH_KEYS $rootfs_tmpdir/root/.ssh/authorized_keys
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run_root chown root:root /root/.ssh/authorized_keys
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run_root chmod 0600 /root/.ssh/authorized_keys
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run_root chmod 0700 /root/.ssh
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# Import local resolv.conf.
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sudo cp "$RESOLVCONF" $rootfs_tmpdir/etc/resolv.conf
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# Generate fstab which is later included in the initramfs
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# Add filesystem to fstab, because busybox mount does not work
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# without -t ext4 for mounting and returns "No such file or directory"
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# nb2:~# blkid| grep ^${DISK}1 | awk '{ print $2 }'
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# UUID="fecf4182-f6dd-4d2c-9af7-8f36444ee25c"
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eval $(blkid | grep ^${DISK}1 | awk '{ print $2 }')
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echo "UUID=$UUID / ext4 defaults 0 1" >> ${rootfs_tmpdir}/etc/fstab
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run_root apk update
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run_root apk add linux-lts openrc udev openssh e2fsprogs
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run_root rc-update add udev
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run_root rc-update add udev-trigger
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run_root rc-update add sshd
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run_root rc-update add networking
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run_root rc-update add hostname
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run_root rc-update add sysctl
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run_root rc-update add modules
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run_root sed -i 's/root:!::0:::::/root:*::0:::::/' /etc/shadow
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sudo tee "$rootfs_tmpdir/etc/network/interfaces" <<EOF
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet6 manual
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up /sbin/ip link set \$IFACE up
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EOF
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sudo tee "$rootfs_tmpdir/etc/hostname" <<EOF
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alpine-unconfigured
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EOF
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# Setup bootloader
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run_root apk add grub-bios
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echo 'GRUB_CMDLINE_LINUX_DEFAULT="quiet rootfstype=ext4"' >> ${rootfs_tmpdir}/etc/default/grub
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run_root grub-mkconfig -o /boot/grub/grub.cfg
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run_root grub-install --target=i386-pc ${DISK}
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# Cleanup
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run_root rm -f /etc/resolv.conf
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for dir in dev proc sys; do
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sudo umount ${rootfs_tmpdir}/${dir}
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done
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sudo umount $rootfs_tmpdir
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sync
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rmdir ${rootfs_tmpdir}
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echo "${DISK} has been setup with Alpine Linux"
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exit 0
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