#!/bin/bash
#Script:automysqlbackup.sh
#Version:Beta 1.0
#author:www.weibo.com/100306117
#date:2013-06-15

#以下配置信息请自己修改
mysql_user="root" #MySQL备份用户
mysql_password="" #MySQL备份用户的密码
mysql_host="localhost" #要备份的主机，一般为localhost
mysql_port="3306" #MySQL端口号，一般为3306
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=/www/embk  #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


#以下配置请保持默认不要修改
backup_time=`date +%Y%m%d%H%M`  #定义备份详细时间
backup_cache_dir=$backup_location/cache  #备份缓存文件夹全路径
backup_data_dir=$backup_location/data  #备份文件夹全路径
backup_data_filename=$backup_data_dir/$backup_time.sql.tar.gz  #备份文件的名称 包括路径
backup_log_dir=$backup_location/log  #备份日志文件夹全路径
backup_log_mailcontent=$backup_log_dir/mailcontent.log  #邮件内容缓存文件全路径
welcome_msg="Welcome to use auto MySQL backup tools!" #欢迎语

#写入欢迎信息
`mkdir -p $backup_log_dir`
`echo $welcome_msg > $backup_log_mailcontent`
    
#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!" >> $backup_log_mailcontent`
    `mutt $adminmail -s "$subject_msg_error" < $backup_log_mailcontent`
    exit
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!" >> $backup_log_mailcontent`
    `mutt $adminmail -s "$subject_msg_error" < $backup_log_mailcontent`
    exit
else
    #判断有没有定义备份的数据库，如果定义则开始备份，否则退出备份
    if [ "$backup_db_arr" != "" ];then
        #dbnames=$(cut -d ',' -f1-5 $backup_database)
        #echo "arr is (${backup_db_arr[@]})"
        for dbname in ${backup_db_arr[@]}
        do
            `mkdir -p $backup_cache_dir`
            # 排除库中的平台币
            prefix="data_"
            dbtalbes=$(mysql -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password -D $dbname -e "SHOW TABLES LIKE '$prefix%';" | tail -n +2)
            for dt in $dbtalbes; do
                ignoretbs+=("--ignore-table=$dbname.$dt")
            done
            # 排除平台币的操作
            `mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password $dbname ${ignoretbs[@]} "--ignore-table=$dbname.failed_jobs" > $backup_cache_dir/$dbname$backup_time.sql`
            # 原来的操作
            #`mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password $dbname > $backup_cache_dir/$dbname$backup_time.sql`
            flag=`echo $?`
            if [ $flag != "0" ];then
                `echo "database $dbname backup fail!" >> $backup_log_mailcontent`
            fi
        done
    else
        `echo "ERROR:No database to backup! backup stop" >> $backup_log_mailcontent`
        # `mutt $adminmail -s "$subject_msg_error" < $backup_log_mailcontent`
        exit
    fi

    #如果开启了删除过期备份，则进行删除操作
    backup_data_num=`ls $backup_data_dir | wc -l`
    if [ "$expire_backup_delete" == "ON" -a $backup_data_num!=0 ];then
        `find $backup_data_dir -type f -ctime +$expire_days -exec rm -rf {} \;`
    fi

    #缓存备份目录打包放到数据备份目录 删除缓存备份目录
    backup_cache_num=`ls $backup_cache_dir | wc -l`
    if [ $backup_cache_num!=0 ];then
        `mkdir -p $backup_data_dir`
        `tar zcPf $backup_data_filename $backup_cache_dir/`
        `rm -rf $backup_cache_dir`
    else
        `echo "All database backup fail!" >> $backup_log_mailcontent`
        # `mutt $adminmail -s "$subject_msg_error" < $backup_log_mailcontent`
        exit
    fi

    `echo "All database backup success! Thank you!" >> $backup_log_mailcontent`
	/www/mtool -f $backup_data_filename -c /www/mail.conf
    exit
fi