mysql 備份與還原

1、新建shell腳本

mysql_user="root" #MySQL備份用戶
mysql_password="密碼" #MySQL備份用戶的密碼
mysql_host="IP"
mysql_port="3306"
mysql_charset="utf8" #MySQL編碼
backup_db_arr=("test") #要備份的數據庫名稱，多個用空格分開隔開 如("db1" "db2" "db3")
backup_location=/opt/mysql #備份數據存放位置，末尾請不要帶"/",此項可以保持默認，程序會自動創建文件夾
expire_backup_delete="ON" #是否開啓過期備份刪除 ON爲開啓 OFF爲關閉
expire_days=3 #過期時間天數 默認爲三天，此項只有在expire_backup_delete開啓時有效
 
# 本行開始以下不需要修改
backup_time=`date +%Y%m%d%H%M` #定義備份詳細時間
backup_Ymd=`date +%Y-%m-%d` #定義備份目錄中的年月日時間
backup_3ago=`date -d '3 days ago' +%Y-%m-%d` #3天之前的日期
backup_dir=$backup_location/$backup_Ymd #備份文件夾全路徑
welcome_msg="Welcome to use MySQL backup tools!" #歡迎語
 
# 判斷MYSQL是否啓動,mysql沒有啓動則備份退出
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
 
# 連接到mysql數據庫，無法連接則備份退出
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 [ $flag != "0" ]; then
echo "ERROR:Can't connect mysql server! backup stop!"
exit
else
echo "MySQL connect ok! Please wait......"
# 判斷有沒有定義備份的數據庫，如果定義則開始備份，否則退出備份
if [ "$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
# 如果開啓了刪除過期備份，則進行刪除操作
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

2、修改shell腳本屬性，賦予執行權限

chmod 600 /opt/mysqlBackup.sh
chmod +x /opt/mysqlBackup.sh

3、定時執行腳本

vi /etc/crontab

添加

00 00 * * * /root/mysqlBackup.sh

分 時

4、手動執行腳本

4、MySQL恢復

到備份目錄下解壓文件：

查看新的數據庫test1是否還原test數據庫的表