#!/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="jpds@gmail.com" # 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 ubuntu@*.*.*.*:/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 {} \;