Percona XtraBackup 8.0不支持对在MySQL 8.0之前的版本，Percona Server for MySQL或 Percona XtraDB Cluster中创建的数据库进行备份。由于MySQL 8.0在数据字典，重做日志和撤消日志中引入的更改与以前的版本不兼容，因此Percona XtraBackup 8.0 目前不可能也支持8.0之前的版本。
因为我准备备份生产环境的数据，但是生产环境不能连外网，所以只能先下载rpm包或者源码包进行安装，编译安装太慢了，所以就选择rpm包安装，安装的时候，可能也需要解决依赖的问题，缺什么就下载什么rpm包，这样最好。
授人以鱼不如授人以渔，以下是我的安装步骤，另外，结束时附上我是如何找到这些依赖rpm包。
因为生产环境是mysql5.6的，所以这里演示的是centos6安装percona-xtrabackup-24-2.4.4版本。
CentOS7的percona-xtrabackup2.4.12版本
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.12/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.12-1.el7.x86_64.rpm
先检查这些是否安装依赖包是否都安装好了，没有被安装的，请安装
rpm -q libaio-devel libgpg-error-devel libgcrypt-devel autoconf automake libidn-devel libcurl-devel
我提示的就是一下几个没有安装，根据提示没有安装的进行下载安装。
依赖包下载：
wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-devel-0.3.107-10.el6.x86_64.rpm wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libgpg-error-devel-1.7-4.el6.x86_64.rpm wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpm wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libidn-devel-1.18-2.el6.x86_64.rpm wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libcurl-devel-7.19.7-53.el6_9.x86_64.rpm wget http://download-ib01.fedoraproject.org/pub/epel/6/x86_64/Packages/l/libev-4.03-3.el6.x86_64.rpm wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
注意可能有顺序之分
安装依赖：
rpm -ivh libaio-devel-0.3.107-10.el6.x86_64.rpm rpm -ivh libgpg-error-devel-1.7-4.el6.x86_64.rpm rpm -ivh libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpm rpm -ivh libidn-devel-1.18-2.el6.x86_64.rpm rpm -ivh libcurl-devel-7.19.7-53.el6_9.x86_64.rpm rpm -ivh libev-4.03-3.el6.x86_64.rpm
下载percona-xtrabackup
CentOS6的percona-xtrabackup8.0.7版本
wget https://www.percona.com/downloads/Percona-XtraBackup-LATEST/Percona-XtraBackup-8.0-7/binary/redhat/6/x86_64/percona-xtrabackup-80-8.0.7-1.el6.x86_64.rpm
CentOS6的percona-xtrabackup2.4.4版本
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
CentOS7的percona-xtrabackup2.4.4版本
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.4-1.el7.x86_64.rpm
安装percan-xtrabackup：
rpm -ivh percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
检查是否安装成功
在命令行后，输入innob，按tab键，如果可以自动补全innobackupex，即说明安装成功。
附：
比如我缺少libaio-devel这个包，我就直接百度“libaio-devel 下载”，找到有一个“Libaio-devel Download (RPM)”的连接，点击进入，
找到对应的系统有，这里有CentOS6,7,8等等，选择对应的操作系统架构“CentOS i386”or “CentOS x86_64”，
我是CentOS x86_64的所以选择“libaio-devel-0.3.107-10.el6.x86_64.rpm”，进入网页后，找到Download>>Binary Package,点击后面的连接就可以下载了。
Percona XtraBackup 8.0不支持对在MySQL 8.0之前的版本，Percona Server for MySQL或 Percona XtraDB Cluster中创建的数据库进行备份。由于MySQL 8.0在数据字典，重做日志和撤消日志中引入的更改与以前的版本不兼容，因此Percona XtraBackup 8.0 目前不可能也支持8.0之前的版本。
因为我准备备份生产环境的数据，但是生产环境不能连外网，所以只能先下载rpm包或者源码包进行安装，编译安装太慢了，所以就选择rpm包安装，安装的时候，可能也需要解决依赖的问题，缺什么就下载什么rpm包，这样最好。授人以鱼不如授人以渔，以下是我的安装步骤，另外，结束时附上我是如何找到这些依赖rpm包。
因为生产环境是mysql5.6的，所以这里演示的是centos6安装percona-xtrabackup-24-2.4.4版本。CentOS7的percona-xtrabackup2.4.12版本wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.12/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.12-1.el7.x86_64.rpm
先检查这些是否安装依赖包是否都安装好了，没有被安装的，请安装rpm -q libaio-devel libgpg-error-devel libgcrypt-devel autoconf automake libidn-devel libcurl-devel我提示的就是一下几个没有安装，根据提示没有安装的进行下载安装。下载：wget http://mirror.centos.org/centos/6/os/x86_64/Packages/libaio-devel-0.3.107-10.el6.x86_64.rpmwget http://mirror.centos.org/centos/6/os/x86_64/Packages/libgpg-error-devel-1.7-4.el6.x86_64.rpmwget http://mirror.centos.org/centos/6/os/x86_64/Packages/libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpmwget http://mirror.centos.org/centos/6/os/x86_64/Packages/libidn-devel-1.18-2.el6.x86_64.rpmwget http://mirror.centos.org/centos/6/os/x86_64/Packages/libcurl-devel-7.19.7-53.el6_9.x86_64.rpmwget http://download-ib01.fedoraproject.org/pub/epel/6/x86_64/Packages/l/libev-4.03-3.el6.x86_64.rpmwget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
注意可能有顺序之分安装依赖：rpm -ivh libaio-devel-0.3.107-10.el6.x86_64.rpmrpm -ivh libgpg-error-devel-1.7-4.el6.x86_64.rpmrpm -ivh libgcrypt-devel-1.4.5-12.el6_8.x86_64.rpmrpm -ivh libidn-devel-1.18-2.el6.x86_64.rpmrpm -ivh libcurl-devel-7.19.7-53.el6_9.x86_64.rpmrpm -ivh libev-4.03-3.el6.x86_64.rpm
下载percona-xtrabackupCentOS6的percona-xtrabackup8.0.7版本wget https://www.percona.com/downloads/Percona-XtraBackup-LATEST/Percona-XtraBackup-8.0-7/binary/redhat/6/x86_64/percona-xtrabackup-80-8.0.7-1.el6.x86_64.rpmCentOS6的percona-xtrabackup2.4.4版本wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpmCentOS7的percona-xtrabackup2.4.4版本wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.4/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.4-1.el7.x86_64.rpm
安装percan-xtrabackup：rpm -ivh percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
检查是否安装成功在命令行后，输入innob，按tab键，如果可以自动补全innobackupex，即说明安装成功。
比如我缺少libaio-devel这个包，我就直接百度“libaio-devel 下载”找到有一个“Libaio-devel Download (RPM)”的连接，点击进入，找到对应的系统有，这里有CentOS6,7,8等等，选择对应的操作系统架构“CentOS i386”or “CentOS x86_64”，我是CentOS x86_64的所以选择“libaio-devel-0.3.107-10.el6.x86_64.rpm”，进入网页后，找到Download>>Binary Package,点击后面的连接就可以下载了。