FreeBSD Storage for OpenShift with Democratic CSI

Today quite different topic, using ZFS/NFS on FreeBSD as backend storage for containers/pods running on OpenShift platform. Serving storage for OpenShift is not as simple as OpenShift will not just consume NFS or iSCSI volumes “just like that” … OpenShift requires a special CSI driver in between to make that even work. My first association with CSI is of course CSI series like CSI: Miami … but the real name is Container Storage Interface of course : While the Democratic CSI driver is suited mostly for Linux based systems like TrueNAS SCALE for example – its zfs-generic-nfs driver also works with FreeBSD – and this is what we will use today. The FreeBSD setup is very simple – its just NFSv4 only server and a dedicated NFS share for OpenShift along with dedicated ZFS dataset. One can also use any regular user with added ZFS permissions done via zfs allow command or a regular user with sudo(8) to lift up the permissions. The FreeBSD/ZFS/NFS part was done my be – as I am not expert in the…