CentOS/RHEL当前最新可以下载的版本:
EL6 Package: http://download.zfsonlinux.org/epel/zfs-release.el6.noarch.rpm
EL7.3 Package: http://download.zfsonlinux.org/epel/zfs-release.el7_3.noarch.rpm
EL7.4 Package: http://download.zfsonlinux.org/epel/zfs-release.el7_4.noarch.rpm
此文档以CentOS 7.4为基础，查看你的具体版本号
# cat /etc/centos-release
安装DKMS
OpenZFS默认会以DKMS方式安装，需要先准备好DKMS。
# yum install http://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm # yum install dkms
安装ZFS
# yum install http://download.zfsonlinux.org/epel/zfs-release.el7_4.noarch.rpm # gpg --quiet --with-fingerprint /etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux # yum install kernel-devel zfs # modprobe zfs
注意：安装完成后要启动这些服务，否则重启后将不能自动挂载pool
# systemctl preset zfs-import-cache zfs-import-scan zfs-import.target zfs-mount zfs-share zfs-zed zfs.target
参考资料
https://github.com/zfsonlinux/zfs/wiki/RHEL-and-CentOS