#!/bin/sh # This script generates Fedora images for OpenNebula, being heavily inspired # from srht's Fedora build image definition. # We could have used the Fedora Server Edition or even the @Core package group # (detailed below) but the result image would be quite large/bloated with # unecessary dependencies. This scheme allows maximum flexibility, and is # definitely opinionated. # Depends on the following packages (as of Fedora 31): # qemu-img util-linux coreutils dnf curl # Run locally (without network) with: # qemu-system-x86_64 -enable-kvm -m 1G -drive file=$IMAGE,format=qcow2 set -e set -x # XXX: Handle command-line arguments? RELEASE=31 ARCH=x86_64 IMAGE_PATH=fedora-$RELEASE-$(date --iso-8601).img.qcow2 IMAGE_SIZE=10G NBD_DEVICE=/dev/nbd1 # TODO: find the package definition and built ourself, publish in some RPM repository. ONE_CONTEXT_RPM_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v5.10.0/one-context-5.10.0-1.el8.noarch.rpm" ONE_CONTEXT_RPM_PATH=/root/one-context.rpm cleanup() { # The order here is important. umount /mnt/dev/pts 2>/dev/null || true umount /mnt/dev/shm 2>/dev/null || true umount /mnt/dev 2>/dev/null || true umount /mnt/proc 2>/dev/null || true umount /mnt/run 2>/dev/null || true umount /mnt/sys 2>/dev/null || true umount /mnt/boot 2>/dev/null || true umount /mnt 2>/dev/null || true qemu-nbd --disconnect "$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 [ ! -f '/etc/fedora-release' ]; then echo "WARNING: this script has been designed to run on a Fedora system." >&2 echo "WARNING: Not running Fedora. 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" # Don't forget to cleanup, even if the script crash. trap cleanup EXIT # Create partition table, format partitions. sfdisk --no-reread "$NBD_DEVICE" <> /mnt/etc/resolv.conf # Initialize /etc/hosts. cat > /mnt/etc/hosts << EOF 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 EOF # See https://github.com/OpenNebula/addon-context-linux/issues/121 for details. # network-scripts.x86_64 : Legacy scripts for manipulating of network devices run_root dnf -y install network-scripts # Install (magic?) one-context RPM and hope things works as expected. curl -L "$ONE_CONTEXT_RPM_URL" > "/mnt$ONE_CONTEXT_RPM_PATH" run_root dnf -y install "$ONE_CONTEXT_RPM_PATH" run_root rm "$ONE_CONTEXT_RPM_PATH" # Initalize base services. run_root systemd-machine-id-setup run_root systemctl enable systemd-networkd.service run_root ln -sf /usr/share/zoneinfo/UTC /etc/localtime run_root systemctl enable systemd-timesyncd.service # Install kernel and bootloader. # Note: linux-firmware is not required our environment and takes almost 200M # uncompressed but is a direct dependency of kernel-core... run_root dnf -y install kernel grub2 # Add support for virtio block devices at boot time. cat > /mnt/etc/dracut.conf.d/virtio-blk.conf <>/mnt/etc/fstab <