OpenEBS LocalPV-ZFS: keep your pool and let openebs-zfs stay
the default StorageClass. miroir scopes itself to the dataset the
MiroirNode's spec.pools[].zfs.dataset names.
Other LVM tenants: bound the thin pool with
the MiroirNode's spec.pools[].lvmthin.poolSize (e.g. 400g) and let the
co-tenant allocate from the VG's remainder.
Rook/Ceph: miroir's default DRBD port base (7000) collides with
the Ceph mgr dashboard's non-SSL default on host-network clusters.
Set drbd.portBase in Helm values to move miroir's range, or move
the dashboard (cephClusterSpec.dashboard.port). See
Troubleshooting.