diff --git a/ubuntu-build-opennebula-image.sh b/ubuntu-build-opennebula-image.sh
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+#!/bin/sh
+
+# This script generates Ubuntu images for OpenNebula.
+#
+# Test image locally (without network) with:
+#   qemu-system-x86_64 -enable-kvm -m 1G -drive file=$IMAGE,format=qcow2
+
+set -e
+set -x
+
+# XXX: Handle command-line arguments?
+RELEASE=eoan # 19.10
+ARCH=amd64
+IMAGE_PATH=ubuntu-$RELEASE-$(date --iso-8601).img.qcow2
+IMAGE_SIZE=10G
+NBD_DEVICE=/dev/nbd0
+
+# TODO: find the package definition and built ourself, publish in some RPM repository.
+ONE_CONTEXT_DEB_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v5.10.0/one-context_5.10.0-1.deb"
+ONE_CONTEXT_DEB_PATH=/root/one-context.deb
+
+cleanup() {
+	# The order here is important.
+	umount /mnt/dev/pts 2>/dev/null || true
+	umount /mnt/dev/shm 2>/dev/null || true
+	umount /mnt/dev 2>/dev/null || true
+	umount /mnt/proc 2>/dev/null || true
+	umount /mnt/run 2>/dev/null || true
+	umount /mnt/sys 2>/dev/null || true
+	umount /mnt/boot 2>/dev/null || true
+	umount /mnt 2>/dev/null || true
+	qemu-nbd --disconnect "$NBD_DEVICE" || true
+}
+
+run_root() {
+	chroot /mnt /usr/bin/env \
+		PATH=/sbin:/usr/sbin:/bin:/usr/bin \
+		sh -c "$*"
+}
+
+if [ "$(whoami)" != 'root' ]; then
+	echo "This script must be run as root." >&2
+	exit 1
+fi
+
+if [ $(lsb_release --short --id) != "Ubuntu" ]; then
+	echo "WARNING: this script has been designed to run on an Ubuntu system." >&2
+	echo "WARNING: Not running Ubuntu. Giving you 5 seconds to abort." >&2
+	sleep 5
+fi
+
+# Create base QCOW2 image.
+qemu-img create -f qcow2 "$IMAGE_PATH" "$IMAGE_SIZE"
+modprobe nbd max_part=16
+qemu-nbd --connect="$NBD_DEVICE" "$IMAGE_PATH"
+
+# Wait for qemu-nbd to settle.
+sleep 1
+
+# Don't forget to cleanup, even if the script crash.
+trap cleanup EXIT
+
+# Create partition table, format partitions.
+sfdisk --no-reread "$NBD_DEVICE" <<EOF
+1M,500M,L,*
+,,L
+EOF
+
+mkfs.ext4 "${NBD_DEVICE}p1"
+mkfs.ext4 "${NBD_DEVICE}p2"
+
+# Mount partitions, install base OS.
+
+mount "${NBD_DEVICE}p2" /mnt
+mkdir /mnt/boot
+mount "${NBD_DEVICE}p1" /mnt/boot
+
+debootstrap \
+	--arch=$ARCH $RELEASE \
+	/mnt http://archive.ubuntu.com/ubuntu/
+
+mount --bind /dev /mnt/dev
+mount --bind /dev/pts /mnt/dev/pts
+mount --bind /dev/shm /mnt/dev/shm
+mount --bind /proc /mnt/proc
+mount --bind /run /mnt/run
+mount --bind /sys /mnt/sys
+
+# Guest networking is to be handled by the one-context package.
+# See https://github.com/OpenNebula/addon-context-linux for details.
+
+# Required to resolve package mirror in chroot.
+cp /etc/resolv.conf /mnt/etc/resolv.conf
+
+# Initialize /etc/hosts.
+cat > /mnt/etc/hosts << EOF
+127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
+::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
+
+EOF
+
+# Configure package sources and update package index.
+cat >/mnt/etc/apt/sources.list <<EOF
+deb http://archive.ubuntu.com/ubuntu/ $RELEASE main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ $RELEASE-security main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ $RELEASE-updates main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ $RELEASE-backports main restricted universe multiverse
+EOF
+run_root apt-get update
+
+# Install (magic?) one-context DEB and hope things works as expected.
+curl -L "$ONE_CONTEXT_DEB_URL" > "/mnt$ONE_CONTEXT_DEB_PATH"
+run_root apt-get -y install "$ONE_CONTEXT_DEB_PATH"
+run_root rm "$ONE_CONTEXT_DEB_PATH"
+
+# Manually install legacy network scripts used by one-context.
+run_root apt-get -y install ifupdown
+
+# Initalize base services.
+run_root systemd-machine-id-setup
+
+run_root ln -sf /usr/share/zoneinfo/UTC /etc/localtime
+run_root systemctl enable systemd-timesyncd.service
+
+# Install kernel and bootloader. Do not autoconfigure grub.
+run_root echo "grub-pc grub-pc/install_devices_empty boolean true" | debconf-set-selections
+run_root DEBIAN_FRONTEND=noninteractive apt-get -y install locales linux-base linux-image-generic grub-pc
+
+# Configure grub.
+run_root grub-install --target=i386-pc "${NBD_DEVICE}"
+run_root grub-mkconfig -o /boot/grub/grub.cfg
+
+# Install en configure SSH daemon.
+run_root apt-get -y install openssh-server
+
+# Generate fstab file.
+boot_uuid=$(blkid --match-tag UUID --output value "${NBD_DEVICE}p1")
+root_uuid=$(blkid --match-tag UUID --output value "${NBD_DEVICE}p2")
+cat >>/mnt/etc/fstab <<EOF
+UUID=$boot_uuid /boot ext4 rw,relatime,data=ordered 0 2
+UUID=$root_uuid /     ext4 rw,relatime,data=ordered 0 1
+EOF
+
+# Reset systemd's environment.
+run_root rm -f /etc/machine-id
+run_root touch /etc/machine-id
+rm -f /var/lib/systemd/random-seed
+
+# Remove temporary files and reclaim freed disk space.
+run_root apt-get clean
+
+# Make sure everything is written to disk before exiting.
+sync