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