#!/bin/sh # This script generates almalinux images for OpenNebula. # Depends on the following packages (as of Almalinux 8.3): # qemu-img util-linux coreutils dnf curl e2fsprogs # Run locally (without network) with: # qemu-system-x86_64 -enable-kvm -m 1G -drive file=$IMAGE,format=qcow2 set -e set -x # XXX: Handle command-line arguments? RELEASE=9.3 ARCH=x86_64 IMAGE_PATH=almalinux-$RELEASE-$(date --iso-8601).img IMAGE_SIZE=10G LOOPBACK_DEVICE=/dev/loop0 # since v9.3, there is an issue is the compilation of RHEL 9 and it's derivatives to use the x86-64-v2 instruction set. # refer to Task#12351, change cpu type # TODO: find the package definition and built ourself, publish in some RPM repository. ONE_CONTEXT_RPM_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v6.6.1/one-context-6.6.1-1.el8.noarch.rpm" ONE_CONTEXT_RPM_PATH=/root/one-context.rpm cleanup() { # The order here is important. umount /mnt/dev/pts 2>/dev/null || true umount /mnt/dev/shm 2>/dev/null || true umount /mnt/dev 2>/dev/null || true umount /mnt/proc 2>/dev/null || true umount /mnt/run 2>/dev/null || true umount /mnt/sys 2>/dev/null || true umount /mnt/boot 2>/dev/null || true umount /mnt 2>/dev/null || true losetup -d "$LOOPBACK_DEVICE" } 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/almalinux-release' ]; then echo "WARNING: this script has been designed to run on a AlmaLinux system." >&2 echo "WARNING: Not running AlmaLinux. Giving you 5 seconds to abort." >&2 sleep 5 fi # Create base RAW image (no LOOPBACK support in RHEL/AlmaLinux). qemu-img create -f raw "$IMAGE_PATH" "$IMAGE_SIZE" losetup "$LOOPBACK_DEVICE" "$IMAGE_PATH" # Don't forget to cleanup, even if the script crash. trap cleanup EXIT # Create partition table, format partitions. { sfdisk --no-reread "$LOOPBACK_DEVICE" < /mnt/etc/hosts << EOF 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 EOF # See https://github.com/OpenNebula/addon-context-linux/issues/121 for details. # network-scripts.x86_64 : Legacy scripts for manipulating of network devices #run_root dnf -y install network-scripts run_root dnf -y install NetworkManager # Install (magic?) one-context RPM and hope things works as expected. curl -L "$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" # Install resize2fs, which is required to resize the root file-system. run_root dnf -y install e2fsprogs # Initalize base services. run_root systemd-machine-id-setup run_root ln -sf /usr/share/zoneinfo/UTC /etc/localtime # Install and configure NTP client. run_root dnf install -y chrony run_root systemctl enable chronyd.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 <