my-rook-config/deploy/examples/cluster-external-management.yaml

#################################################################################################################
# Define the settings for the rook-ceph-external cluster with common settings for a production cluster.

# For example, if Rook is not managing any existing cluster in the 'rook-ceph' namespace do:
#   kubectl create -f crds.yaml -f common.yaml -f operator.yaml
#   kubectl create -f cluster-external.yaml

# If there is already a cluster managed by Rook in 'rook-ceph' then run:
#   kubectl create -f common-external.yaml -f cluster-external-management.yaml
#################################################################################################################
apiVersion: ceph.rook.io/v1
kind: CephCluster
metadata:
  name: rook-ceph-external
  namespace: rook-ceph-external # namespace:cluster
spec:
  external:
    enable: true
  dataDirHostPath: /var/lib/rook
  # providing an image is required, if you want to create other CRs (rgw, mds, nfs)
  cephVersion:
    image: quay.io/ceph/ceph:v18.2.2 # Should match external cluster version