Fix: Backup-Script mit smarter Rotation und Lock-Schutz gegen parallele Läufe
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2 changed files with 93 additions and 10 deletions
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@ -2,6 +2,15 @@
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---
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## 2026-04-12 – Backup: smarte Rotation und Lock-Schutz
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### Geändert
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- `scripts/backup.sh`: Rotation auf 7 Tages- / 4 Wochen- / 12 Monats-Buckets umgestellt (statt pauschaler 90-Tage-Löschung)
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- `scripts/backup.sh`: `flock`-Lock verhindert parallele Läufe bei Verzögerungen
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- `scripts/backup.sh`: Pfade sind absolut (Script funktioniert auch aus Cron ohne Verzeichniswechsel)
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---
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## 2026-04-12 – Uploads: named Volume → Bind Mount
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### Geändert
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@ -1,18 +1,37 @@
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#!/bin/bash
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# Steuerkram – Backup-Script
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# Steuerkram – Backup-Script mit smarter Rotation
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# GoBD: Datensicherung muss regelmäßig erfolgen.
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# Usage: ./scripts/backup.sh
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#
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# Retention:
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# - letzte 7 Tage: täglich (ein Backup pro Tag)
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# - Tage 8 – 28: wöchentlich
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# - Tage 29 – 365: monatlich
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# - älter als 1 Jahr: werden gelöscht
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set -e
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set -eo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
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BACKUP_DIR="$PROJECT_DIR/backups"
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LOCK_FILE="/tmp/steuerkram-backup.lock"
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# Verhindert mehrfachen gleichzeitigen Start (z.B. bei Verzögerung durch langen Backup-Lauf)
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exec 9>"$LOCK_FILE"
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if ! flock -n 9; then
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echo "$(date '+%Y-%m-%d %H:%M:%S') WARN: Backup läuft bereits (Lock: $LOCK_FILE). Abbruch." >&2
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exit 1
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fi
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TIMESTAMP=$(date +%Y%m%d_%H%M%S)
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BACKUP_DIR="./backups"
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mkdir -p "$BACKUP_DIR"
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echo "Erstelle Backup $TIMESTAMP..."
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echo "$(date '+%Y-%m-%d %H:%M:%S') Erstelle Backup $TIMESTAMP..."
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# MariaDB Dump (aus dem Container)
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docker compose exec -T db mariadb-dump \
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docker compose -f "$PROJECT_DIR/docker-compose.yml" \
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--project-directory "$PROJECT_DIR" \
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exec -T db mariadb-dump \
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--user=steuerkram \
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--password=steuerkram \
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--single-transaction \
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@ -21,12 +40,67 @@ docker compose exec -T db mariadb-dump \
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steuerkram > "$BACKUP_DIR/steuerkram_db_$TIMESTAMP.sql"
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# Uploads sichern
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tar -czf "$BACKUP_DIR/steuerkram_uploads_$TIMESTAMP.tar.gz" ./uploads/
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tar -czf "$BACKUP_DIR/steuerkram_uploads_$TIMESTAMP.tar.gz" \
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-C "$PROJECT_DIR" uploads/
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echo "Backup abgeschlossen:"
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echo " DB: $BACKUP_DIR/steuerkram_db_$TIMESTAMP.sql"
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echo " Uploads: $BACKUP_DIR/steuerkram_uploads_$TIMESTAMP.tar.gz"
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# Alte Backups löschen (älter als 90 Tage)
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find "$BACKUP_DIR" -name "steuerkram_*" -mtime +90 -delete
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echo "Alte Backups bereinigt (>90 Tage)."
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# --- Smarte Rotation ---
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echo ""
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echo "Starte Rotation..."
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NOW=$(date +%s)
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declare -A keep_daily # YYYYMMDD → timestamp (letzte 7 Tage, täglich)
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declare -A keep_weekly # Wochennr. → timestamp (Tage 8–28, wöchentlich)
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declare -A keep_monthly # YYYYMM → timestamp (Tage 29–365, monatlich)
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# Alle vorhandenen Timestamps ermitteln, älteste zuerst
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# (neuere Einträge überschreiben Buckets → neuestes Backup pro Periode bleibt)
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mapfile -t TIMESTAMPS < <(
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for f in "$BACKUP_DIR"/steuerkram_db_????????_??????.sql; do
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[ -f "$f" ] || continue
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basename "$f" .sql | sed 's/steuerkram_db_//'
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done | sort
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)
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for TS in "${TIMESTAMPS[@]}"; do
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DATE_PART="${TS:0:8}" # YYYYMMDD
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YEAR="${TS:0:4}"
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MONTH="${TS:4:2}"
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DAY="${TS:6:2}"
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FILE_EPOCH=$(date -d "${YEAR}-${MONTH}-${DAY}" +%s)
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AGE_DAYS=$(( (NOW - FILE_EPOCH) / 86400 ))
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WEEK_BUCKET=$(( AGE_DAYS / 7 ))
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if [ "$AGE_DAYS" -le 7 ]; then keep_daily["$DATE_PART"]="$TS"
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elif [ "$AGE_DAYS" -le 28 ]; then keep_weekly["$WEEK_BUCKET"]="$TS"
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elif [ "$AGE_DAYS" -le 365 ]; then keep_monthly["${YEAR}${MONTH}"]="$TS"
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fi
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# Älter als 365 Tage → kein Bucket → wird weiter unten gelöscht
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done
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# Keep-Set aus allen Buckets zusammenführen
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declare -A KEEP
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for TS in \
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$([ ${#keep_daily[@]} -gt 0 ] && echo "${keep_daily[@]}") \
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$([ ${#keep_weekly[@]} -gt 0 ] && echo "${keep_weekly[@]}") \
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$([ ${#keep_monthly[@]} -gt 0 ] && echo "${keep_monthly[@]}") ; do
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KEEP["$TS"]=1
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done
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# Backups löschen, die in keinem Bucket landen
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DELETED=0
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for TS in "${TIMESTAMPS[@]}"; do
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if [ -z "${KEEP[$TS]+x}" ]; then
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rm -f "$BACKUP_DIR/steuerkram_db_$TS.sql"
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rm -f "$BACKUP_DIR/steuerkram_uploads_$TS.tar.gz"
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echo " Gelöscht: $TS"
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DELETED=$((DELETED + 1))
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fi
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done
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echo " Behalten: ${#KEEP[@]} | täglich: ${#keep_daily[@]} | wöchentlich: ${#keep_weekly[@]} | monatlich: ${#keep_monthly[@]}"
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echo " Gelöscht: $DELETED"
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echo "$(date '+%Y-%m-%d %H:%M:%S') Backup & Rotation abgeschlossen."
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