c585e67482
Replace the single BACKUP_HOUR/BACKUP_MINUTE slot with a comma-separated
list of UTC times. Scheduler walks all slots and sleeps until the soonest
future one, so four daily backups become a one-line env change:
BACKUP_TIMES_UTC=02:30,08:30,14:30,20:30 (default)
Legacy BACKUP_HOUR/BACKUP_MINUTE still honored as a single slot for
backwards compatibility with existing .env files.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
62 lines
1.9 KiB
Bash
Executable file
62 lines
1.9 KiB
Bash
Executable file
#!/bin/sh
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# Runs backup_db.sh at each time in BACKUP_TIMES_UTC (comma-separated HH:MM list).
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# Defaults: 02:30, 08:30, 14:30, 20:30 UTC — four backups per day.
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#
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# Back-compat: if BACKUP_TIMES_UTC is unset but legacy BACKUP_HOUR/BACKUP_MINUTE are,
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# those are honored as a single slot.
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set -eu
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if [ -n "${BACKUP_TIMES_UTC:-}" ]; then
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TIMES="$BACKUP_TIMES_UTC"
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elif [ -n "${BACKUP_HOUR:-}" ] || [ -n "${BACKUP_MINUTE:-}" ]; then
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TIMES="$(printf '%02d:%02d' "${BACKUP_HOUR:-2}" "${BACKUP_MINUTE:-30}")"
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else
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TIMES="02:30,08:30,14:30,20:30"
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fi
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echo "[$(date -u +%FT%TZ)] backup schedule (UTC): ${TIMES}"
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if [ "${BACKUP_RUN_ON_START:-0}" = "1" ]; then
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echo "[$(date -u +%FT%TZ)] BACKUP_RUN_ON_START=1 — running backup immediately"
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/app/backup_db.sh || echo "[$(date -u +%FT%TZ)] initial backup failed (continuing)"
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fi
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# Compute epoch for "today HH:MM UTC" on both GNU and BSD date.
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slot_to_epoch_today() {
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HM="$1"
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date -u -d "today ${HM}:00" +%s 2>/dev/null \
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|| date -u -j -f "%H:%M:%S" "${HM}:00" +%s
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}
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while true; do
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NOW_EPOCH=$(date -u +%s)
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NEXT=""
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# Find the smallest TARGET > NOW across all configured slots (rolling to tomorrow if needed).
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OLDIFS="$IFS"
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IFS=','
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for HM in $TIMES; do
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HM="$(echo "$HM" | tr -d ' ')"
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[ -z "$HM" ] && continue
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T=$(slot_to_epoch_today "$HM")
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if [ "$T" -le "$NOW_EPOCH" ]; then
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T=$((T + 86400))
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fi
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if [ -z "$NEXT" ] || [ "$T" -lt "$NEXT" ]; then
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NEXT="$T"
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fi
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done
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IFS="$OLDIFS"
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if [ -z "$NEXT" ]; then
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echo "[$(date -u +%FT%TZ)] no valid times in BACKUP_TIMES_UTC='${TIMES}'; sleeping 1h"
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sleep 3600
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continue
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fi
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SLEEP=$((NEXT - NOW_EPOCH))
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NEXT_ISO=$(date -u -d "@${NEXT}" +%FT%TZ 2>/dev/null || date -u -r "${NEXT}" +%FT%TZ)
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echo "[$(date -u +%FT%TZ)] next backup in ${SLEEP}s (at ${NEXT_ISO})"
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sleep "$SLEEP"
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/app/backup_db.sh || echo "[$(date -u +%FT%TZ)] backup failed (will retry at next slot)"
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done
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