https://www.percona.com/doc/percona-xtrabackup/2.4/installation/yum_repo.html
1. yum 安装方式
yum install https://repo.percona.com/yum/percona-release-latest.noarch.rpm
wget https://repo.percona.com/yum/percona-release-latest.noarch.rpm rpm -ivH percona-release-latest.noarch.rpm
yum list | grep percona
yum install percona-xtrabackup-24
2. rpm 手动下载安装方式
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
yum localinstall percona-xtrabackup-24-2.4.4-1.el7.x86_64.rpm
说明：mysql 8.0 以上需要使用 xtrabakup8.x。mysql8.0以前的需要使用xtrackup 2.4.x