yum install perl-DBI
yum install perl-DBD-MySQL
yum install perl-Time-HiRes
yum install perl-IO-Socket-SSL

[iyunv@Web1 ~]# rpm -ivh percona-xtrabackup-2.2.-.el6.x86_64.rpm

warning: percona-xtrabackup-2.2.-.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY

error: Failed dependencies:

        libaio.so.()(64bit) is needed by percona-xtrabackup-2.2.-.el6.x86_64

        libaio.so.(LIBAIO_0.)(64bit) is needed by percona-xtrabackup-2.2.-.el6.x86_64

        libaio.so.(LIBAIO_0.)(64bit) is needed by percona-xtrabackup-2.2.-.el6.x86_64

        perl(DBD::mysql) is needed by percona-xtrabackup-2.2.-.el6.x86_64

        perl(Time::HiRes) is needed by percona-xtrabackup-2.2.-.el6.x86_64

安装以下依赖包：

[iyunv@Web1 ~]# yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL