# 备份数据库
0 8 * * * /root/backup/backup.sh

# 或者用备份全部数据
```bash
# 每天备份数据库
0 8 * * * /usr/bin/docker exec postgres pg_dumpall -h /var/run/postgresql -U postgres > /usr/local/docker/pgdata-back/backup_$(date +\%Y\%m\%d).sql
# 删除10天前的数据库备份
0 3 * * * find /usr/local/docker/pgdata-back/ -type f -name 'backup_*.sql' -mtime +10 -exec rm {} \;
```