mysql自动备份多个数据库的实现

#!/bin/bash
#备份目录
BACKUP=/opt/data/backup/mysql
DATETIME=$(date +%Y-%m-%d_%H-%M-%S)
echo $DATETIME
#数据库的地址
HOST=127.0.0.1
#数据库用户名
DB_USER=root
#数据库密码
DB_PW=root
#备份的数据库名
DATABASE1=db-test
DATABASE2=test2
DATABASE3=test3
#创建备份目录
if [ ! -d "${BACKUP}/${DATETIME}" ]
then
mkdir -p "${BACKUP}/${DATETIME}"
fi
cd ${BACKUP}/${DATETIME}
mkdir ${DATABASE}
mkdir test2
mkdir test3
#备份数据库
/usr/local/mysql/bin/mysqldump -u${DB_USER} -p${DB_PW} -h ${HOST} ${DATABASE1} > ${BACKUP}/${DATETIME}/${DATABASE1}/$DATETIME.sql
/usr/local/mysql/bin/mysqldump -u${DB_USER} -p${DB_PW} -h ${HOST} ${DATABASE2}  > ${BACKUP}/${DATETIME}/${DATABASE2} /$DATETIME.sql
/usr/local/mysql/bin/mysqldump -u${DB_USER} -p${DB_PW} -h ${HOST} ${DATABASE3}  > ${BACKUP}/${DATETIME}/${DATABASE3} /$DATETIME.sql
#将文件压缩成 tar.gz
cd ${BACKUP}
tar -zcvf $DATETIME.tar.gz ${DATETIME}
#删除7天前的的备份文件
find ${BACKUP} -atime +7 -name "*.tar.gz" -exec rm -rf {} \;
echo "备份数据库db-test成功"
echo "备份数据库test2 成功"
echo "备份数据库test3 成功"

chmod 775 /opt/data/backup/sh/mysql_backup.sh

/usr/local/mysql/bin/mysqldump -u${DB_USER} -p${DB_PW} -h ${HOST} ${DATABASE1} > ${BACKUP}/${DATETIME}/${DATABASE1}/$DATETIME.sql

/opt/data/backup/sh/mysql_backup.sh

crontab -e

50 23 *  *  0  /opt/data/backup/sh/mysql_backup.sh