Merge branch 'libvirt-executor-image' into 'master'

Add libvirt-executor image for our GitLab Runner custom executor

See merge request !200

.gitlab-ci.yml

@@ -42,6 +42,8 @@ shfmt:
     name: "output"
     paths:
       - "output/*"
+      # Workaround until https://gitlab.com/gitlab-org/gitlab/-/issues/352644 is sorted
+      - build.env
     expire_in: 2d
     reports:
       metrics: metrics.txt
@@ -186,7 +188,9 @@ publish:
     - pacman -Syu --needed --noconfirm vagrant
   script:
     - |
-      for file in output/*; do
+      shopt -s extglob
+      # The libvirt-executor image is not meant for external consumption!
+      for file in output/!(*libvirt-executor*); do
           base="$(basename "${file}")"
           curl -sSf --header "JOB-TOKEN: ${CI_JOB_TOKEN}" --upload-file "${file}" "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/images/v${BUILD_VERSION}/${base}"
       done

images/libvirt-executor.sh

+#!/bin/bash
+# shellcheck disable=SC2034,SC2154
+IMAGE_NAME="Arch-Linux-x86_64-libvirt-executor-${build_version}.qcow2"
+DISK_SIZE="40G"
+PACKAGES=(git git-lfs gitlab-runner)
+SERVICES=()
+
+function pre() {
+  arch-chroot "${MOUNT}" /usr/bin/systemctl disable systemd-time-wait-sync
+  sed -E 's/^#(IgnorePkg *=)/\1 linux/' -i "${MOUNT}/etc/pacman.conf"
+  sed 's/^\(GRUB_CMDLINE_LINUX=".*\)"$/\1 lockdown=confidentiality"/' -i "${MOUNT}/etc/default/grub"
+  arch-chroot "${MOUNT}" /usr/bin/grub-mkconfig -o /boot/grub/grub.cfg
+  # We want to use the transient hostname
+  # https://github.com/systemd/systemd/pull/30814
+  rm -f "${MOUNT}/etc/hostname"
+
+  cat <<EOF >"${MOUNT}/etc/systemd/network/80-dhcp.network"
+[Match]
+Name=en*
+Name=eth*
+
+[Network]
+DHCP=yes
+EOF
+}
+
+function post() {
+  qemu-img convert -c -f raw -O qcow2 "${1}" "${2}"
+  rm "${1}"
+}