Editing Rook Storage for Kubernetes (section)

=== Updating Ceph ===
Updating the Ceph installation to the latest version only requires one change to the Rook deployment; update the image version in the 'cluster-external-management.yaml' file to match the new Ceph version and apply.

If you have to reinstall or rebuild the ceph deployment in an external cluster, more is required, as the identifying information and credentials for the ceph cluster will have changed.

# As above in the installation section, get the necessary information from the ceph cluster and put it into the environment variables in the 'import-xxxx-cluster.sh' script.  Before you run the script, however, you must delete a bunch of things that the script will create:

 kubectl -n rook-ceph-external delete secret \
    rook-csi-cephfs-node rook-csi-cephfs-provisioner rook-csi-rbd-node rook-csi-rbd-provisioner
 kubectl -n rook-ceph-external delete configmap rook-ceph-mon-endpoints

 bash ./import-xxxx-cluster.sh

After the script is executed, watch the operator logs to see that it uses the new information to connect with the new ceph cluster.