@stormi @borzel Thank you. I was able to create the zpool with those two extra commands. I then created a dataset and created a type=file and device-config:location SR. I realize ZFS is still a new feature, but is that the recommended way? I'm completely new to Xen so I am not familiar with creating SRs.

[root@xcp-ng-miqfcsgc] depmod -a
[root@xcp-ng-miqfcsgc] modprobe zfs
[root@xcp-ng-miqfcsgc] zpool create -f tank /dev/sda
[root@xcp-ng-miqfcsgc] zfs create tank/sr
[root@xcp-ng-miqfcsgc] xe sr-create host-uuid=MY_UUID name-label=zfs-sr type=file other-config:o_direct=false device-config:location=/tank/sr/zfs-sr

I have a clean install of 7.5 and I'm following the guide on the wiki but can't install zfs-test or enable the zfs module:

[root@xcp-ng-endlqfgb ~]# yum install --enablerepo="xcp-ng-extras" zfs-test
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package zfs-test.x86_64 0:0.7.9-1.el7.centos will be installed
--> Processing Dependency: lsscsi for package: zfs-test-0.7.9-1.el7.centos.x86_64
--> Processing Dependency: ksh for package: zfs-test-0.7.9-1.el7.centos.x86_64
--> Processing Dependency: fio for package: zfs-test-0.7.9-1.el7.centos.x86_64
--> Processing Dependency: rng-tools for package: zfs-test-0.7.9-1.el7.centos.x86_64
--> Finished Dependency Resolution
Error: Package: zfs-test-0.7.9-1.el7.centos.x86_64 (xcp-ng-extras)
           Requires: fio
Error: Package: zfs-test-0.7.9-1.el7.centos.x86_64 (xcp-ng-extras)
           Requires: lsscsi
Error: Package: zfs-test-0.7.9-1.el7.centos.x86_64 (xcp-ng-extras)
           Requires: rng-tools
Error: Package: zfs-test-0.7.9-1.el7.centos.x86_64 (xcp-ng-extras)
           Requires: ksh
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
[root@xcp-ng-endlqfgb ~]# zpool create tank /dev/sdb
The ZFS modules are not loaded.
Try running '/sbin/modprobe zfs' as root to load them.
[root@xcp-ng-endlqfgb ~]# /sbin/modprobe zfs
modprobe: FATAL: Module zfs not found.
[root@xcp-ng-endlqfgb ~]#