Can't load '/usr/local/lib64/perl5/auto/DBD/mysql/mysql.so' for module DBD::mysql: libmysqlclient.so.18: 无法打开共享对象 at /usr/bin/innobackupex line 18
需要拷贝libmysqlclient.so.18至/usr/lib64:
[root@localhost ~]# cp /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib64/