MySQL使用xtrabackup进行备份还原操作

## 安装依赖包
yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL rsync

## 安装libev4包
rpm -ivh libev4-4.15-7.1.x86_64.rpm

## 安装percona-xtrabackup
rpm -ivh percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm

## xtrabackup备份创建备份用户
CREATE USER 'backuper'@'localhost' IDENTIFIED BY 'backup@123';
GRANT SELECT, RELOAD, PROCESS, SHOW DATABASES, SUPER, LOCK TABLES, REPLICATION CLIENT, SHOW VIEW, EVENT ON *.* TO 'backuper'@'localhost';
FLUSH PRIVILEGES;

## 进行完整备份并压缩
innobackupex --defaults-file="/export/servers/mysql/etc/my.cnf" --host="localhost" --port=3358 --user="backuper" --password="backup@123" --socket="/export/data/mysql/tmp/mysql.sock" --stream=tar "/export/mysql_backup/" | gzip -> "/export/mysql_backup/mysql_full_backup.tar.gz"

## 切换到备份压缩文件所在目录
## 强烈建议创建一个空的目录来存放备份文件，以避免解压后的文件与其他文件冲突
cd /export/mysql_backup/

##加压备份
tar xvf mysql_full_backup.tar.gz

#使用apply-log参数来处理事务日志
innobackupex --apply-log /export/mysql_backup/ 

#备份当前MySQL的数据目录
mv /export/data/mysql /export/data/mysql_bak

## 创建MySQL数据目录
mkdir -p /export/data/mysql/tmp /export/data/mysql/data /export/data/mysql/dumps /export/data/mysql/log

#修改MySQL数据目录的权限
chown -R mysql:mysql /export/data/mysql