58 lines
1.9 KiB
Bash
58 lines
1.9 KiB
Bash
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#!/usr/bin/env bash
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# Nightly logical dump of platform.db + messenger.db from black.
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# Stored as zstd-compressed .sql.zst in $BACKUP_DIR.
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# Pruned to keep last 14 daily + last 8 weekly (Sundays) + last 6 monthly (1st).
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#
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# Run on BLACK (where the authoritative DBs live).
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# Typical schedule: daily @ 03:00 via systemd timer.
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set -euo pipefail
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BACKUP_DIR="${BACKUP_DIR:-/mnt/bigdisk/atlilith-backups/pg}"
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DATE="$(date +%Y%m%d_%H%M%S)"
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mkdir -p "$BACKUP_DIR"
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dump_db() {
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local name="$1"
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local port="$2"
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local out="$BACKUP_DIR/${name}_${DATE}.sql.zst"
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echo "==> dumping ${name} on :${port} → ${out}"
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pg_dump \
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--host=localhost \
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--port="$port" \
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--username=platform \
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--no-owner --no-acl \
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--format=plain \
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"$name" \
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| zstd -3 -T0 -o "$out"
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echo " size: $(du -h "$out" | cut -f1)"
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}
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dump_db "platform" "25440"
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dump_db "messenger" "25441"
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# Retention: keep last 14 dailies. Older dailies get pruned unless they
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# fall on a Sunday (weekly) or the 1st of the month (monthly).
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echo "==> pruning old backups (keep 14d/8w/6m)"
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find "$BACKUP_DIR" -name "*.sql.zst" -mtime +14 -print | while read -r f; do
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fname=$(basename "$f")
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date_part="${fname#*_}"; date_part="${date_part%_*}"
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if [[ -n "$date_part" ]]; then
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day_of_week=$(date -d "${date_part:0:4}-${date_part:4:2}-${date_part:6:2}" +%u 2>/dev/null || echo 0)
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day_of_month="${date_part:6:2}"
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if [[ "$day_of_week" == "7" ]] && [[ $(date -d "${date_part:0:4}-${date_part:4:2}-${date_part:6:2}" +%s 2>/dev/null) -gt $(date -d "8 weeks ago" +%s) ]]; then
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echo " [keep weekly] $fname"; continue
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fi
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if [[ "$day_of_month" == "01" ]] && [[ $(date -d "${date_part:0:4}-${date_part:4:2}-${date_part:6:2}" +%s 2>/dev/null) -gt $(date -d "6 months ago" +%s) ]]; then
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echo " [keep monthly] $fname"; continue
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fi
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fi
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echo " [prune] $fname"
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rm -f "$f"
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done
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echo "done."
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