方式一：
yum安装
1、配置yum源
备份原来的epel源

mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup

配置阿里云epel源.

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

2、安装
yum -y install percona-xtrabackup

方式二：
rpm包安装
1、官网下载rpm包安装
https://www.percona.com/downloads/Percona-XtraBackup-2.4/

wget https://downloads.percona.com/downloads/Percona-XtraBackup-2.4/Percona-XtraBackup-2.4.21/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.21-1.el7.x86_64.rpm

下载慢的，访问我的百度云链接
链接：https://pan.baidu.com/s/1jqN-3JWKzku2BWHgW_eGOA
提取码：9fcr

安装依赖包

yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL

2、安装

rpm -ivh  percona-xtrabackup-24-2.4.21-1.el7.x86_64.rpm --nodeps --force

或者

yum -y localinstall percona-xtrabackup-24-2.4.21-1.el7.x86_64.rpm

方式三：
二进制包安装
1、下载安装包（二进制包）
https://www.percona.com/downloads/Percona-XtraBackup-2.4/Percona-XtraBackup-2.4.21/binary/redhat/7/

wget https://downloads.percona.com/downloads/Percona-XtraBackup-2.4/Percona-XtraBackup-2.4.21/binary/tarball/percona-xtrabackup-2.4.21-Linux-x86_64.glibc2.12.tar.gz

下载慢的，看我百度云链接下载
链接：https://pan.baidu.com/s/1SA6WVObQms3stlmpZvN0Fg
提取码：0ptk

2、安装xtrabackup

tar -xf percona-xtrabackup-2.4.21-Linux-x86_64.glibc2.12.tar.gz
cd percona-xtrabackup-2.4.21-Linux-x86_64.glibc2.12
cp bin/innobackupex /usr/bin/
cp bin/xtrabackup /usr/bin/