89 lines
2.2 KiB
Bash
89 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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DEST_BASE="/run/media/hans/usbsicherung/system-config-backup"
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HOST="$(hostname -s)"
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STAMP="$(date +%F_%H-%M-%S)"
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TARGET_DIR="${DEST_BASE}/${HOST}/${STAMP}"
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LATEST_LINK="${DEST_BASE}/${HOST}/latest"
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LOG_DIR="${DEST_BASE}/${HOST}/logs"
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LOG_FILE="${LOG_DIR}/netzwerk-backup-${STAMP}.log"
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KEEP=20
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WG_SRC="/etc/wireguard"
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NM_SRC="/etc/NetworkManager/system-connections"
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log() {
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local msg="[$(date +%F\ %T)] $*"
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echo "${msg}"
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mkdir -p "${LOG_DIR}"
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echo "${msg}" >> "${LOG_FILE}"
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}
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fail() {
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log "FEHLER: $*"
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exit 1
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}
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if [[ ${EUID} -ne 0 ]]; then
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fail "Dieses Skript muss mit sudo oder als root ausgeführt werden, da /etc/wireguard und /etc/NetworkManager/system-connections Root-Rechte benötigen."
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fi
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if [[ ! -d "${DEST_BASE}" ]]; then
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fail "Zielbasis ${DEST_BASE} existiert nicht oder ist nicht gemountet."
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fi
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if [[ ! -w "${DEST_BASE}" ]]; then
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fail "Zielbasis ${DEST_BASE} ist nicht beschreibbar."
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fi
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mkdir -p "${TARGET_DIR}" "${LOG_DIR}"
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RSYNC_OPTS=(
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-aHAX
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--numeric-ids
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--delete
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--info=stats2,progress2
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--human-readable
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--partial
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)
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if [[ -L "${LATEST_LINK}" ]] && [[ -d "$(readlink -f "${LATEST_LINK}")" ]]; then
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RSYNC_OPTS+=(--link-dest="$(readlink -f "${LATEST_LINK}")")
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log "Verwende link-dest: $(readlink -f "${LATEST_LINK}")"
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else
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log "Kein vorheriger Snapshot gefunden – es wird ein vollständiger Lauf erstellt."
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fi
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backup_tree() {
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local src="$1"
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local name="$2"
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if [[ -d "${src}" ]]; then
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log "Sichere ${src} -> ${TARGET_DIR}/${name}/"
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rsync "${RSYNC_OPTS[@]}" "${src}/" "${TARGET_DIR}/${name}/" | tee -a "${LOG_FILE}"
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else
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log "Quelle ${src} existiert nicht – wird übersprungen."
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fi
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}
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backup_tree "${WG_SRC}" "wireguard"
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backup_tree "${NM_SRC}" "networkmanager-system-connections"
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ln -sfn "${TARGET_DIR}" "${LATEST_LINK}"
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log "latest-Link zeigt jetzt auf ${TARGET_DIR}"
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cd "${DEST_BASE}/${HOST}"
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SNAPS=(20*/)
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if (( ${#SNAPS[@]} > KEEP )); then
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log "Rotationslauf: ${#SNAPS[@]} Snapshots vorhanden, KEEP=${KEEP}."
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ls -1dt 20*/ | tail -n +$((KEEP + 1)) | while read -r old; do
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log "Lösche alten Snapshot: ${old}"
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rm -rf -- "${old}"
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done
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else
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log "Keine Rotation nötig. Snapshots vorhanden: ${#SNAPS[@]}"
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fi
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log "Netzwerk-Konfigurationsbackup abgeschlossen." |