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#! /bin/sh
# Auto-install OpenBSD/amd64 6.6 to a copy-on-write disk image using QEMU.
#
# Copyright (c) 2020 Stefan Kreutz <mail@skreutz.com>
set -o errexit
set -o nounset
set -o xtrace
# Set default parameters.
DISK_FILE="${DISK_FILE-disk.qcow2}"
DISK_SIZE="${DISK_SIZE-160G}"
CPU_COUNT="${CPU_COUNT-6}"
MEMORY_SIZE="${MEMORY_SIZE-4G}"
# Check dependencies.
for cmd in qemu-img qemu-system-x86_64 curl signify rsync ssh socat ;
do
command -v "${cmd}"
done
# Download and verify official installation image and file sets.
mkdir -p mirror/pub/OpenBSD/6.6
if [ ! -e mirror/pub/OpenBSD/6.6/openbsd-66-base.pub ] ;
then
curl \
--output mirror/pub/OpenBSD/6.6/openbsd-66-base.pub \
--silent \
https://ftp.openbsd.org/pub/OpenBSD/6.6/openbsd-66-base.pub
fi
if [ ! -d mirror/pub/OpenBSD/6.6/amd64 ] ;
then
mkdir -p tmp
rsync --recursive --delete --quiet \
rsync://ftp.halifax.rwth-aachen.de/openbsd/6.6/amd64/ \
tmp/
( cd tmp && \
signify -C -q -p ../mirror/pub/OpenBSD/6.6/openbsd-66-base.pub -x SHA256.sig )
mv tmp mirror/pub/OpenBSD/6.6/amd64
fi
# Create autoinstall configuration if not exists.
if [ ! -e mirror/install.conf ] ;
then
ssh_pub_key="$( cat ~/.ssh/id_rsa.pub )"
cat << EOF > mirror/install.conf
Change the default console to com0 = yes
Which speed should com0 use = 115200
System hostname = openbsd
Password for root = *************
Allow root ssh login = no
Setup a user = puffy
Password for user = *************
Public ssh key for user = ${ssh_pub_key}
What timezone are you in = UTC
Location of sets = http
HTTP Server = 10.0.2.1
Unable to connect using https. Use http instead = yes
URL to autopartitioning template for disklabel = http://10.0.2.1/disklabel
Set name(s) = site66.tgz
Checksum test for site66.tgz failed. Continue anyway = yes
Unverified sets: site66.tgz. Continue without verification = yes
EOF
fi
# Create disklabel configuration if not exists.
if [ ! -e mirror/disklabel ] ;
then
cat << EOF > mirror/disklabel
/ 2G
swap 8G
/tmp 1G
/var 1G
/var/www 100G
/usr 2G
/usr/X11R6 500M
/usr/local 4G
/usr/src 1M
/usr/obj 1M
/home 4G
EOF
fi
# Create site-specific file set if not exists.
if [ ! -d site ] ;
then
mkdir site
cat << EOF > site/install.site
#! /bin/ksh
set -o errexit
echo "https://cdn.openbsd.org/pub/OpenBSD" > /etc/installurl
echo "permit nopass keepenv :wheel" > /etc/doas.conf
#echo "syspatch && shutdown -r now" >> /etc/rc.firsttime
EOF
chmod +x site/install.site
fi
# Package site-specific file set if not exists or changed.
site_dir_changed="$( find site -exec stat -c %Y {} \; | sort -r | head -n 1 )"
if [ ! -e mirror/pub/OpenBSD/6.6/amd64/site66.tgz ] || [ "$( stat -c %Y mirror/pub/OpenBSD/6.6/amd64/site66.tgz )" -lt "${site_dir_changed}" ] ;
then
rm -f mirror/pub/OpenBSD/6.6/amd64/site66.tgz
( cd site && tar -czf ../mirror/pub/OpenBSD/6.6/amd64/site66.tgz . )
( cd mirror/pub/OpenBSD/6.6/amd64 && ls -l > index.txt )
fi
# Create TFTP directory if not exists.
if [ ! -d tftp ] ;
then
mkdir tftp
ln -s ../mirror/pub/OpenBSD/6.6/amd64/pxeboot tftp/auto_install
ln -s ../mirror/pub/OpenBSD/6.6/amd64/bsd.rd tftp/bsd.rd
mkdir tftp/etc
cat << EOF > tftp/etc/boot.conf
stty com0 115200
set tty com0
boot tftp:/bsd.rd
EOF
fi
# Remove existing disk image if configuration changed.
if [ -e "${DISK_FILE}" ] ;
then
vm_created="$( stat -c %W "${DISK_FILE}" )"
for f in mirror/install.conf mirror/disklabel mirror/pub/OpenBSD/6.6/amd64/site66.tgz tftp/etc/boot.conf
do
if [ "${vm_created}" -lt "$( stat -c %Y "$f" )" ] ;
then
( >&2 printf "%s changed. Recreating virtual machine." "$f" )
rm "${DISK_FILE}"
fi
done
fi
# Create disk image if not exists.
if [ ! -e "${DISK_FILE}" ] ;
then
qemu-img create -f qcow2 "${DISK_FILE}" "${DISK_SIZE}"
fi
# Wait until ./mirror is served at http://127.0.0.1:8080/.
while [ ! "$( curl --silent --location --write-out '%{http_code}\n' --output /dev/null http://127.0.0.1:8080/install.conf )" = 200 ] ;
do
( >&2 printf "Please serve the directory ./mirror/ at http://127.0.0.1:8080/.\n" )
sleep 5
done
# Auto-install OpenBSD.
qemu-system-x86_64 \
-enable-kvm \
-m "${MEMORY_SIZE}" \
-smp "cpus=${CPU_COUNT}" \
-device e1000,netdev=n1 \
-netdev "user,id=n1,hostname=openbsd-vm,tftp-server-name=10.0.2.1,tftp=tftp,bootfile=auto_install,hostfwd=tcp::2222-:22,guestfwd=tcp:10.0.2.1:80-cmd:socat - tcp:127.0.0.1:8080" \
-drive "file=${DISK_FILE},media=disk,if=virtio" \
-nographic
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