49 lines
1.5 KiB
Bash
49 lines
1.5 KiB
Bash
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#!/bin/sh
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# Dumps the database once at start, every day at BACKUP_TIME (HH:MM, container time zone), and whenever
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# the api asks for one through /requests (it does so before every database upgrade).
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set -eu
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: "${BACKUP_TIME:=02:30}"
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: "${BACKUP_KEEP_DAYS:=30}"
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mkdir -p /backups /requests
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chmod 1777 /requests
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rm -f /tmp/first-backup-done
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dump() {
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file="/backups/budget_$(date +%Y%m%d_%H%M%S)${1:-}.sql.gz"
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if pg_dump --no-owner --clean --if-exists | gzip > "$file.tmp"; then
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mv "$file.tmp" "$file"
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echo "$(date -Iseconds) backup written: $file"
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find /backups -name 'budget_*.sql.gz' -mtime +"$BACKUP_KEEP_DAYS" -delete
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return 0
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fi
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rm -f "$file.tmp"
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echo "$(date -Iseconds) backup FAILED" >&2
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return 1
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}
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answer_requests() {
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for request in /requests/*.request; do
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[ -e "$request" ] || continue
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id=$(basename "$request" .request)
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echo "$(date -Iseconds) backup requested: $(cat "$request" 2>/dev/null)"
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if dump _before_upgrade; then echo ok > "/requests/$id.done"; else echo failed > "/requests/$id.done"; fi
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rm -f "$request"
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done
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# answers nobody picked up
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find /requests -name '*.done' -mmin +60 -delete 2>/dev/null || true
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}
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until pg_isready -q; do sleep 2; done
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dump || true
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touch /tmp/first-backup-done
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while true; do
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now=$(date +%s)
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next=$(date -d "$(date +%Y-%m-%d) $BACKUP_TIME" +%s 2>/dev/null || date -D '%Y-%m-%d %H:%M' -d "$(date +%Y-%m-%d) $BACKUP_TIME" +%s)
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[ "$next" -le "$now" ] && next=$((next + 86400))
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while [ "$(date +%s)" -lt "$next" ]; do
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answer_requests
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sleep 5
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done
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dump || true
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done
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