From 7f735f515e11083fc37b3153aa85141c16fcab88 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timoth=C3=A9e=20Floure?= <work@tfloure.ch>
Date: Thu, 28 Mar 2024 11:57:10 +0100
Subject: [PATCH] [ONE images] initial OpenBSD image build script

---
 .../openbsd-build-opennebula-image.sh         | 143 ++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100755 opennebula-images/openbsd-build-opennebula-image.sh

diff --git a/opennebula-images/openbsd-build-opennebula-image.sh b/opennebula-images/openbsd-build-opennebula-image.sh
new file mode 100755
index 0000000..aa67061
--- /dev/null
+++ b/opennebula-images/openbsd-build-opennebula-image.sh
@@ -0,0 +1,143 @@
+#!/bin/sh
+
+# This script generates OpenBSD images for OpenNebula, being inspired from
+# srht's OpenBSD build image definition. It assumes running on an OpenBSD host.
+
+set -e
+set -x
+
+# XXX: Handle command-line arguments?
+RELEASE=7.4
+ARCH=amd64
+IMAGE_PATH="$(pwd)/openbsd-$RELEASE-$(date +"%Y-%m-%d").img"
+IMAGE_SIZE=10G
+VIRTUAL_DEVICE=vnd0
+
+# Setup working directory.
+workdir="$(mktemp -d)"
+cd "${workdir:?}"
+
+cleanup() {
+	# The order here is important.
+	umount /mnt/dev/pts 2>/dev/null || true
+	umount /mnt/dev/shm 2>/dev/null || true
+	umount /mnt/dev 2>/dev/null || true
+	umount /mnt/proc 2>/dev/null || true
+	umount /mnt/run 2>/dev/null || true
+	umount /mnt/sys 2>/dev/null || true
+	umount /mnt/boot 2>/dev/null || true
+	umount /mnt 2>/dev/null || true
+	vnconfig -u "$VIRTUAL_DEVICE"
+	rm -r "${workdir:?}"
+}
+
+# Create base image.
+vmctl create -s "$IMAGE_SIZE" "$IMAGE_PATH"
+vnconfig "$VIRTUAL_DEVICE" "$IMAGE_PATH"
+
+# Don't forget to cleanup, even if the script crash.
+trap cleanup EXIT
+
+# Format disk, mount /mnt.
+fdisk -iy "${VIRTUAL_DEVICE}"
+cat > "${workdir}/partitions" <<EOF
+/ 1G-* 100%
+EOF
+disklabel -w -A -T "${workdir:?}/partitions" "${VIRTUAL_DEVICE}"
+
+# Fetch base system.
+short_version="$(echo "$RELEASE" | tr -d .)"
+openbsd_sets="base comp xbase xshare"
+openbsd_kernel="bsd.mp"
+openbsd_installurl="${openbsd_installurl:-"https://cdn.openbsd.org/pub/OpenBSD"}"
+mirror_dir="${RELEASE}"
+openbsd_public_key="openbsd-${short_version}-base.pub"
+
+set_files=""
+for s in $openbsd_sets; do
+	set_files="$set_files ${s}${short_version}.tgz"
+done
+
+for f in $set_files $openbsd_kernel SHA256.sig SHA256
+do
+	test -f "$f" || ftp "${openbsd_installurl}/${mirror_dir}/${ARCH}/${f}"
+done
+
+signify -Cp /etc/signify/"$openbsd_public_key" \
+	-x SHA256.sig $set_files $openbsd_kernel
+
+# Install base system.
+for f in $set_files
+do
+	tar -zxphf "$f" -C /mnt
+done
+
+tar -zxphf /mnt/var/sysmerge/etc.tgz -C /mnt
+tar -zxphf /mnt/var/sysmerge/xetc.tgz -C /mnt
+
+cat > /mnt/etc/fstab <<EOF
+/dev/sd0a /     ffs rw,wxallowed 1 1
+EOF
+
+cd /mnt/dev
+sh MAKEDEV all
+cd "$workdir"
+
+# Configure base system.
+cat >>/mnt/etc/ssh/sshd_config <<EOF
+PermitRootLogin yes
+EOF
+
+echo "openbsd" > /mnt/etc/myname
+echo "nameserver 2606:4700:4700::1111" >> /mnt/etc/resolv.conf
+echo "nameserver 1.1.1.1" > /mnt/etc/resolv.conf
+echo "127.0.0.1 localhost.localdomain localhost" > /mnt/etc/hosts
+echo "::1 localhost.localdomain localhost" >> /mnt/etc/hosts
+echo "$openbsd_installurl" > /mnt/etc/installurl
+ln -sf /usr/share/zoneinfo/UTC /mnt/etc/localtime
+
+
+cat >>/mnt/etc/rc.conf.local <<EOF
+dhcpleased_flags=NO
+pf=NO
+pflogd_flags=NO
+resolvd_flags=NO
+slaacd_flags=NO
+sndiod_flags=NO
+EOF
+
+# Install kernel
+cp "$openbsd_kernel" /mnt/bsd
+
+cp SHA256.sig /mnt/var/db/installed.SHA256.sig
+sha256 /mnt/bsd | (umask 077; sed 's,/mnt,,' >/mnt/var/db/kernel.SHA256)
+rm -rf /mnt/usr/share/relink/kernel
+mkdir -m 700 /mnt/usr/share/relink/kernel
+tar -C /mnt/usr/share/relink/kernel -xzf /mnt/usr/share/relink/kernel.tgz GENERIC.MP
+rm -f /mnt/usr/share/relink/kernel.tgz
+echo "Relinking kernel"
+chroot /mnt /bin/ksh -e -c "cd /usr/share/relink/kernel/GENERIC.MP; make newbsd; make newinstall" > /dev/null
+
+# Update and install utilities.
+chroot /mnt /usr/sbin/pkg_add $pkg_add_params -u
+chroot /mnt /usr/sbin/pkg_add $pkg_add_params bash cloud-agent
+
+# Remove useless kernel object files. This saves about 300MB of space in the final image
+rm -rf /mnt/usr/share/relink/kernel/GENERIC.MP/
+
+# Disable boot wait. Saves 5 seconds
+echo "boot" > /mnt/etc/boot.conf
+
+# Dump root filesystem in OS image.
+makefs "/dev/${VIRTUAL_DEVICE}a" /mnt
+growfs -y "/dev/${VIRTUAL_DEVICE}a"
+fsck -y "/dev/${VIRTUAL_DEVICE}a"
+sync
+
+# Setup bootloader.
+mount /dev/vnd0a /mnt
+installboot -vr /mnt ${VIRTUAL_DEVICE:?}
+umount /mnt
+
+# Convert raw image to qcow.
+vmctl create -i "$IMAGE_PATH" "$IMAGE_PATH.qcow2"