Mostly following the guide found here:
https://wiki.hpdd.intel.com/display/PUB/Create+and+Mount+a+Lustre+Filesystem
- Downgrade kernel if needed:
yum remove kernel-2.6.32-<whatever>*
- Enable EPEL repo:
yum install epel-release
- Enable ZFS on Linux repo:
yum localinstall --nogpgcheck http://archive.zfsonlinux.org/epel/zfs-release.el6.noarch.rpm