#!/bin/bash
# Backs up plantdb volumes (SQLite db + media) to NAS via SSH.
# Cron: 0 3 * * * /home/stephan/stacks/plantdb/scripts/backup_to_nas.sh >> /var/log/plantdb_backup.log 2>&1
set -euo pipefail

NAS_USER="admin"
NAS_HOST="nas"
NAS_PATH="/share/MD0_DATA/Public/plantdb_backup"
SSH_KEY="/home/stephan/.ssh/plantdb_backup"
TMP_DIR="/tmp/plantdb_backup_$$"

cleanup() {
  docker run --rm -v "${TMP_DIR}:/dst" alpine sh -c "rm -rf /dst/db /dst/media"
  rmdir "${TMP_DIR}"
}
trap cleanup EXIT

mkdir -p "${TMP_DIR}/db" "${TMP_DIR}/media"

# Extract volume data to tmp dir
docker run --rm \
  -v plantdb_db:/src/db:ro \
  -v plantdb_media:/src/media:ro \
  -v "${TMP_DIR}:/dst" \
  alpine sh -c "cp -a /src/db/. /dst/db/ && cp -a /src/media/. /dst/media/"

# Sync to NAS
rsync -av --delete \
  -e "ssh -i ${SSH_KEY} -o StrictHostKeyChecking=no" \
  "${TMP_DIR}/" "${NAS_USER}@${NAS_HOST}:${NAS_PATH}/"

echo "[$(date '+%Y-%m-%d %H:%M:%S')] plantdb backup complete"