zfsowner

Set of scripts to mount zfs filesystems as users to support delegated administration and non-root superuser rights. As currently implemented, the scripts are suitable for managing NFS shares to test lab machines.

Setup

• Install and modify the scripts below as required for your setup.

• Add the following to /etc/sysctl.conf:

  vfs.usermount=1
  vfs.zfs.super_owner=1
  

  and set the sysctls manually or reboot.

• On the parent export directory (e.g. pool/exports/users) create a delegated permission set named @users_delegation

  zfs allow -s @users_delegation clone,create,destroy,mount,promote,rename,sharenfs,snapshot pool/exports/users
  

• You will likely also want to set a default sharenfs property

  zfs set sharenfs="-ro -network 192.168.5.0/24 -maproot=root" pool/exports/users
  

Scripts

• useradd.sh

  Install in /usr/local/sbin or your preferred location and customize as required.

  Simple script to add a user with a ZFS home directory and a second delegated ZFS storage location subject to user control.

• zfsowner

  Install in /usr/local/etc/rc.d to remount user owned mount points as the user at boot. Such mountpoints are marked by the org.freebsd:owner attribute.

• zfs-update-exports

  Install in /usr/local/bin and add an entry to sudoers like

  ALL ALL=(root) NOPASSWD: /usr/local/bin/zfs-update-exports
  

  to allow users to force a refresh of exports after altering their delegated share setttings.