mirror of
https://github.com/rennf93/roboco.git
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47 lines
1.6 KiB
Bash
47 lines
1.6 KiB
Bash
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#!/usr/bin/env bash
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# Periodic pg_dump of the roboco DB (interim backup — no PITR/WAL archiving).
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# Runs once on start, then every BACKUP_INTERVAL_SECONDS (default 24h). A
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# failed dump logs and is retried next cycle; the loop itself never exits.
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# ponytail: a plain sleep loop, not a cron daemon — good enough for a fixed
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# 24h cadence, swap for a scheduler only if finer granularity is ever needed.
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set -u
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BACKUP_DIR="${BACKUP_DIR:-/backups}"
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KEEP="${BACKUP_KEEP:-14}"
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INTERVAL_SECONDS="${BACKUP_INTERVAL_SECONDS:-86400}"
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# pg_dump reads these natively — no need to pass -h/-p/-U/-d by hand.
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export PGHOST="${POSTGRES_HOST:-roboco-postgres}"
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export PGPORT="${POSTGRES_PORT:-5432}"
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export PGUSER="${POSTGRES_USER:-roboco}"
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export PGPASSWORD="${POSTGRES_PASSWORD:-roboco}"
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export PGDATABASE="${POSTGRES_DB:-roboco}"
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mkdir -p "$BACKUP_DIR"
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run_backup() {
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local ts dest
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ts="$(date -u +%Y%m%dT%H%M%SZ)"
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dest="${BACKUP_DIR}/roboco-${ts}.dump"
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echo "[backup] $(date -u -Iseconds) starting pg_dump -> ${dest}"
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if pg_dump -Fc -f "${dest}.tmp"; then
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mv "${dest}.tmp" "${dest}"
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echo "[backup] $(date -u -Iseconds) OK: ${dest}"
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else
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rm -f "${dest}.tmp"
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echo "[backup] $(date -u -Iseconds) FAILED — will retry next cycle" >&2
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fi
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# Prune to the newest $KEEP dumps. Filenames are our own fixed timestamp
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# format (no spaces/globs to worry about), so plain `ls -t` is enough.
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# shellcheck disable=SC2012
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ls -1t "${BACKUP_DIR}"/roboco-*.dump 2>/dev/null | tail -n "+$((KEEP + 1))" | while IFS= read -r old; do
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rm -f "$old"
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done
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}
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while true; do
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run_backup
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sleep "$INTERVAL_SECONDS"
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done
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