Mysql - shell自动备份

vi /opt/mysqlBackup.sh

#!/bin/bash

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=/opt/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=3		# 过期时间天数 默认为三天，此项只有在expire_backup_delete开启时有效

# 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 <<end
use mysql;
select host,user from user where user='root' and host='localhost';
exit
end

flag=`echo $?`
if [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        # 判断有没有定义备份的数据库，如果定义则开始备份，否则退出备份
        if [ "$backup_db_arr" != "" ];then
                #dbnames=$(cut -d ',' -f1-5 $backup_database)
                #echo "arr is (${backup_db_arr[@]})"
                for dbname in ${backup_db_arr[@]}
                do
                        echo "database $dbname backup start..."
                        `mkdir -p $backup_dir`
                        `mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password $dbname --default-character-set=$mysql_charset | gzip > $backup_dir/$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

chmod +rwx /脚本存放路径/脚本名.sh

vim /etc/crontab

00 03 * * * root /脚本存放路径/脚本名.sh		# 每天凌晨3:00自动执行任务
# 日志记录在/var/log/cron中