PostgreSQL 定时备份

postgresql定时备份
需求：
每天凌晨4点按日期执行自动备份，生产.dump文件。备份文件保存15天。
#vim /var/lib/pgsql/backup.sh

    #!/bin/bash
   cur_time=$(date '+%Y-%m-%d')
  ifteendays_time=$(date -d -15days '+%Y-%m-%d')
  rm -rf /var/lib/pgsql/pgsql-backup.$fifteendays_time.dump  
  echo "Starting Backup PostgreSQL ..."
    /usr/local/postgresql/bin/pg_dumpall -U postgres -p 3433 >  /var/lib/pgsql/"pgsql-backup.$cur_time.dump"
echo "Finish Backup ..."   

#chmod 755 /var/lib/pgsql/back.up

#su - postgres

$crontab -e

    00 4 * * *  /var/lib/pgsql/backup.sh