crontab定时备份脚本

[TOC] ## 备份脚本 sh

mysql_backup.sh

``` #!/bin/bash # 以下配置信息请自己修改 mysql_user="USER" #MySQL备份用户 mysql_password="PASSWORD" #MySQL备份用户的密码 mysql_host="localhost" mysql_port="3306" mysql_charset="utf8" #MySQL编码 backup_db_arr=("db1" "db2") #要备份的数据库名称，多个用空格分开隔开 如("db1" "db2" "db3") backup_location=/var/www/mysql #备份数据存放位置，末尾请不要带"/",此项可以保持默认，程序会自动创建文件夹 expire_backup_delete="ON" #是否开启过期备份删除 ON为开启 OFF为关闭 expire_days=10 #过期时间天数 默认为三天，此项只有在expire_backup_delete开启时有效 # 本行开始以下不需要修改 backup_time=`date +%Y%m%d%H%M` #定义备份详细时间 backup_Ymd=`date +%Y-%m-%d` #定义备份目录中的年月日时间 backup_3ago=`date -d '3 days ago' +%Y-%m-%d` #3天之前的日期 backup_dir=$backup_location/$backup_Ymd #备份文件夹全路径 welcome_msg="Welcome to use MySQL backup tools!" #欢迎语 # 判断MYSQL是否启动,mysql没有启动则备份退出 mysql_ps=`ps -ef |grep mysql |wc -l` mysql_listen=`netstat -an |grep LISTEN |grep $mysql_port|wc -l` if [ [$mysql_ps == 0] -o [$mysql_listen == 0] ]; then echo "ERROR:MySQL is not running! backup stop!" exit else echo $welcome_msg fi # 连接到mysql数据库，无法连接则备份退出 mysql -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password < $backup_dir/$dbname-$backup_time.sql.gz` flag=`echo $?` if [ $flag == "0" ];then echo "database $dbname success backup to $backup_dir/$dbname-$backup_time.sql.gz" else echo "database $dbname backup fail!" fi done else echo "ERROR:No database to backup! backup stop" exit fi # 如果开启了删除过期备份，则进行删除操作 if [ "$expire_backup_delete" == "ON" -a "$backup_location" != "" ];then #`find $backup_location/ -type d -o -type f -ctime +$expire_days -exec rm -rf {} \;` `find $backup_location/ -type d -mtime +$expire_days | xargs rm -rf` echo "Expired backup data delete complete!" fi echo "All database backup success! Thank you!" exit fi ```

修改shell脚本的属性： ``` chmod 600 /root/mysql_backup.sh chmod +x /root/mysql_backup.sh ``` 设置好属性之后，把命令加入crontab，我们设置了每天00:00定时自动备份，然后把备份的脚本目录/var/www/mysql设置为rsync同步目录。 ``` 00 00 * * * /root/mysql_backup.sh ```