From 8598e46f6b70693a19af73d664c9e301cdd67cd1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Timoth=C3=A9e=20Floure?= Date: Mon, 16 Dec 2019 13:46:34 +0100 Subject: [PATCH] Initial CentOS image build script --- centos-build-opennebula-image.sh | 170 +++++++++++++++++++++++++++++++ 1 file changed, 170 insertions(+) create mode 100755 centos-build-opennebula-image.sh diff --git a/centos-build-opennebula-image.sh b/centos-build-opennebula-image.sh new file mode 100755 index 0000000..6a8fe31 --- /dev/null +++ b/centos-build-opennebula-image.sh @@ -0,0 +1,170 @@ +#!/bin/sh + +# This script generates CentOS images for OpenNebula. + +# Depends on the following packages (as of CentOS 8): +# qemu-img util-linux coreutils dnf curl e2fsprogs + +# Run locally (without network) with: +# qemu-system-x86_64 -enable-kvm -m 1G -drive file=$IMAGE,format=qcow2 + +set -e +set -x + +# XXX: Handle command-line arguments? +RELEASE=8 +ARCH=x86_64 +IMAGE_PATH=centos-$RELEASE-$(date --iso-8601).img +IMAGE_SIZE=10G +LOOPBACK_DEVICE=/dev/loop0 + +# TODO: find the package definition and built ourself, publish in some RPM repository. +ONE_CONTEXT_RPM_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v5.10.0/one-context-5.10.0-1.el8.noarch.rpm" +ONE_CONTEXT_RPM_PATH=/root/one-context.rpm + +cleanup() { + # The order here is important. + umount /mnt/dev/pts 2>/dev/null || true + umount /mnt/dev/shm 2>/dev/null || true + umount /mnt/dev 2>/dev/null || true + umount /mnt/proc 2>/dev/null || true + umount /mnt/run 2>/dev/null || true + umount /mnt/sys 2>/dev/null || true + umount /mnt/boot 2>/dev/null || true + umount /mnt 2>/dev/null || true + losetup -d "$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/centos-release' ]; then + echo "WARNING: this script has been designed to run on a CentOS system." >&2 + echo "WARNING: Not running CentOS. Giving you 5 seconds to abort." >&2 + sleep 5 +fi + +# Create base RAW image (no LOOPBACK support in RHEL/CentOS). +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 "$LOOPBACK_DEVICE" < /mnt/etc/hosts << EOF +127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 +::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 + +EOF + +# See https://github.com/OpenNebula/addon-context-linux/issues/121 for details. +# network-scripts.x86_64 : Legacy scripts for manipulating of network devices +run_root dnf -y install network-scripts + +# Install (magic?) one-context RPM and hope things works as expected. +curl -L "$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 <