121 lines
3.0 KiB
Bash
Executable File
121 lines
3.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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main() {
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while getopts ":l:d:t:x:c:h" opt; do
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case "${opt}" in
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l)
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unset VM_FILTER
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IFS="," read -r -a VM_FILTER <<< "$OPTARG"
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;;
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d)
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local backup_location="${OPTARG}"
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backup_location="${backup_location%/}"
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;;
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t)
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declare -g TARGET="$OPTARG"
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;;
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x)
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declare -g EXTENSION
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if [[ "${OPTARG,,}" == 'none' ]]; then
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EXTENTION=""
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else
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command -v "$OPTARG" >/dev/null 2>&1 || { echo "$OPTARG command not found"; exit 1; }
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EXTENTION="${OPTARG,,}"
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fi
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declare -g COMPRESSION="$OPTARG"
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;;
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c)
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declare -g run_cleanup=y
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declare -g files_to_keep="${OPTARG}"
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;;
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h)
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usage
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;;
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*)
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usage
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;;
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esac
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done
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backup_location=${backup_location:-$PWD}
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if [[ "${#VM_FILTER[*]}" -gt 0 ]]; then
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backup_vms "$backup_location" "${VM_FILTER[@]}"
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else
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backup_vms "$backup_location"
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fi
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}
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lxc() {
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local lxc_cmd="${TARGET:-lxc}"
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command "$lxc_cmd" "$@"
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}
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list_vms() {
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lxc list -c n -f csv
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}
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usage() {
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cat <<EOF
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Usage: ${0##*/} [-l vm[,vm...]] [-d backup_dir] [-t lxc|incus] [-x <compression alogorithm>] [-c <keep n backups>] [-h]
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Options:
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-l Comma-separated list of VMs to back up
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-d Directory where backups will be stored (default: current directory)
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-t Manager type: lxc or incus (default: lxc)
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-x Compression algorithm (e.g. gzip, zstd, none)
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-c Cleanup old backups keeping a set number (default: 2)
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-h Show this message
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EOF
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exit 1
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}
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backup_vms() {
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local backup_location="$1"; shift
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local vms=("$@")
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# when no argument use list of all VMs
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if ((${#vms[@]} == 0)); then
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mapfile -t vms < <(list_vms)
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fi
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for vm in "${vms[@]}"; do
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[[ -n $vm ]] || continue
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start_backup "$vm" "$backup_location"
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done
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}
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start_backup() {
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local vm=$1
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local backup_base="$2"
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local compression="${COMPRESSION:-none}"
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local ext="${EXTENTION}" ; [[ -n "$ext" ]] && ext=".${ext}"
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local destination="${backup_base}/${vm}"
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local backup_name="${vm}_$(date +"%Y-%m-%d_%H-%M-%S").tar${ext}"
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[[ -d "$backup_base" ]] || { echo "${backup_base} is not a directory"; exit 1; }
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[[ -d "$destination" ]] || mkdir "$destination"
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[[ -f "${destination}/${backup_name}" ]] && { echo "Backup already exists"; return 2; }
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lxc export "$vm" --instance-only --compression "${compression}" "${destination}/${backup_name}" || { echo "Error exporting $vm"; return 1; }
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[[ -n "$run_cleanup" ]] && prune_backups "$destination"
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}
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prune_backups() {
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local backup_directory="$1"
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mapfile -t backup_files < <(find "$backup_directory" -maxdepth 1 -type f -printf '%T@ %p\n' | sort -n | head -n "-${files_to_keep}" | cut -d' ' -f2-)
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if [[ ${#backup_files[@]} -gt 0 ]]; then
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echo "Removing ${#qcow2_files[@]} old backup files for $vm (keeping last $total_files_to_keep files)"
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printf '%s\0' "${backup_files[@]}" | xargs -0 rm -fv
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else
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echo "No old backups to remove for $vm"
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fi
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}
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main "$@"
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