• Create a pool rancher-high-prio-cephfs-metadata (replicated)
• Create a pool rancher-high-prio-cephfs-data (replicated) or
• Optionally create a pool rancher-high-prio-cephfs-root (replicated) and rancher-high-prio-cephfs-data (erasure coded)

ceph fs new  rancher-high-prio-cephfs rancher-high-prio-cephfs-metadata rancher-high-prio-cephfs-data
ceph auth get-or-create-key client.rancher-high-prio-admin mds 'allow *' mgr 'allow *' mon 'allow *' osd 'allow * pool=rancher-high-prio-cephfs-metadata, allow * pool=rancher-high-prio-cephfs-data'
# retruns somthing like AQA0[...]==
sudo mkdir -p /mnt/rancher-high-prio-cephfs
sudo mount -t ceph 10.6.16.57:6789,10.6.16.58:6789,10.6.16.59:6789:/ -o name=rancher-high-prio-admin,secret=AQA0[...]==,mds_namespace=rancher-high-prio-cephfs /mnt/rancher-high-prio-cephfs