centos6 安装部署 xtrabackup
参考：
cnblogs.com/maohedashu/p/13999418.html
https://blog.csdn.net/weixin_34310369/article/details/89781282
wget https://downloads.percona.com/downloads/Percona-XtraBackup-2.4/Percona-XtraBackup-2.4.24/binary/redhat/6/x86_64/percona-xtrabackup-80-8.0.14-1.el6.x86_64.rpm
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.7/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.7-2.el6.x86_64.rpm
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.7/binary/redhat/6/x86_64/percona-xtrabackup-24-debuginfo-2.4.7-2.el6.x86_64.rpm
rpm -ivh percona-xtrabackup-24-2.4.7-2.el6.x86_64.rpm
xtrabackup -version
