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https://codeberg.org/PostERG/xamxam.git
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Pontoporeia
fb5e856288
- surface backup/cleanup cron logs + backup freshness status - email xamxam@erg.be when SQLite backups go stale (backup watchdog) - sync SQLite snapshots to Nextcloud WebDAV + remote-freshness watchdog - precise retention pruning, manual sync in check recipe, and Nextcloud-sync docs
55 lines
2.1 KiB
Bash
Executable File
55 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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# backup-sqlite.sh — Safe hot backup of the XAMXAM SQLite database.
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#
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# Uses sqlite3's .backup command (WAL-safe) then gzip-compresses.
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# Prunes backups older than RETENTION_DAYS.
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#
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# Usage:
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# /usr/local/bin/backup-sqlite.sh # default: 30 days
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# RETENTION_DAYS=90 /usr/local/bin/backup-sqlite.sh # 90 days
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#
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# Expected to be run from cron:
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# 0 * * * * /usr/local/bin/backup-sqlite.sh >> /var/log/xamxam-backup-$(date +%Y-%m-%d).log 2>&1
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# 0 2 * * * RETENTION_DAYS=90 /usr/local/bin/backup-sqlite.sh >> /var/log/xamxam-backup-$(date +%Y-%m-%d).log 2>&1
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set -euo pipefail
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DB_PATH="${DB_PATH:-/var/www/xamxam/storage/xamxam.db}"
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BACKUP_DIR="${BACKUP_DIR:-/var/backups/xamxam}"
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RETENTION_DAYS="${RETENTION_DAYS:-30}"
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TIMESTAMP=$(date +"%Y-%m-%dT%H-%M-%S")
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BACKUP_FILE="$BACKUP_DIR/db-$TIMESTAMP.db.gz"
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TMP_SNAPSHOT="/tmp/xamxam-snapshot-$$.db"
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mkdir -p "$BACKUP_DIR" 2>/dev/null || {
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echo "ERROR: Cannot create backup directory '$BACKUP_DIR'. Run: just deploy-backup-cron" >&2
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exit 1
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}
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# Safe hot backup using SQLite's online backup API
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sqlite3 "$DB_PATH" ".backup $TMP_SNAPSHOT"
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gzip -c "$TMP_SNAPSHOT" > "$BACKUP_FILE"
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rm -f "$TMP_SNAPSHOT"
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# Prune old backups.
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# Use filename timestamps (deterministic) rather than -mtime, which has
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# day-rounding ambiguity (-mtime +N means N+1 days). Files are named
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# db-YYYY-MM-DDTHH-MM-SS.db.gz, so we delete anything whose date is more
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# than RETENTION_DAYS in the past.
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RETENTION_SECONDS=$((RETENTION_DAYS * 86400))
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NOW_EPOCH=$(date +%s)
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for f in "$BACKUP_DIR"/db-*.db.gz; do
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[ -e "$f" ] || continue
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base=$(basename "$f" .db.gz) # db-YYYY-MM-DDTHH-MM-SS
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stamp=${base#db-} # YYYY-MM-DDTHH-MM-SS
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# Reformat YYYY-MM-DDTHH-MM-SS → YYYY-MM-DD HH:MM:SS for date(1).
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named=$(echo "$stamp" | sed 's/T/ /; s/-/:/3g') || continue
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ts=$(date -d "$named" +%s 2>/dev/null) || continue
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if [ $((NOW_EPOCH - ts)) -gt $RETENTION_SECONDS ]; then
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rm -f "$f"
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fi
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done
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] Backup written: $BACKUP_FILE ($(du -h "$BACKUP_FILE" | cut -f1))"
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