备份MySQL数据库

备份MySQL数据库脚本：

#!/bin/bash
# description:  MySQL buckup shell script
# author:       lmj
# web site:     http://www.cnblogs.com/dscode 

st=$(date +%s)
USER="root" # 用户名
PASSWORD="root" # 密码
DATABASE="myblogdb" # 数据库
MAIL="[email protected]" # mail
BACKUP_DIR=/home/lmj/data_backup/ # 备份文件存储路径
LOGFILE=/home/lmj/data_backup/data_backup.log # 日志文件路径

DATE=`date +%Y%m%d-%H%M` # 用日期格式作为文件名
DUMPFILE=$DATE.sql
ARCHIVE=$DATE.sql.tar.gz
OPTIONS="-u$USER -p$PASSWORD $DATABASE"

# 判断备份文件存储目录是否存在，否则创建该目录
if [ ! -d $BACKUP_DIR ]
then
    mkdir -p "$BACKUP_DIR"
fi  

# 开始备份之前，将备份信息头写入日记文件
echo "    ">> $LOGFILE
echo "--------------------" >> $LOGFILE
echo "BACKUP DATE:" $(date +"%y-%m-%d %H:%M:%S") >> $LOGFILE
echo "-------------------" >> $LOGFILE  

# 切换至备份目录
cd $BACKUP_DIR
mysqldump $OPTIONS > $DUMPFILE 
# 判断数据库备份是否成功
if [[ $? == 0 ]]
then
    tar czvf $ARCHIVE $DUMPFILE >> $LOGFILE 2>&1
    echo "[$ARCHIVE] Backup Successful!" >> $LOGFILE
    rm -f $DUMPFILE # 删除原始备份文件,只需保留备份压缩包
    # 把压缩包文件备份到其他机器上。
    scp -P 110 $BACKUP_DIR$ARCHIVE [email protected]*.*.*.*:/home/user/data_backup/ >> $LOGFILE  2>&1
 else
    echo "Database Backup Fail!" >> $LOGFILE
# 备份失败后向管理者发送邮件提醒
mail -s "database:$DATABASE Daily Backup Fail!" $MAIL
fi
echo "Backup Process Done" 
# 删除3天以上的备份文件
# Cleaning
find $BACKUP_DIR  -type f -mtime +2 -name "*.tar.gz" -exec rm -f {} \;