$ git clone --single-branch --branch v1.5.8 https://github.com/rook/rook.git
$ cp operator.yaml rook/cluster/examples/kubernetes/ceph/
$ cp cluster.yaml rook/cluster/examples/kubernetes/ceph/
# copy common.yaml only if you want to disable hostNetwork
$ cp common.yaml rook/cluster/examples/kubernetes/ceph/
$ cd rook/cluster/examples/kubernetes/ceph/
$ kubectl create -f crds.yaml -f common.yaml -f operator.yaml
## verify the rook-ceph-operator is in the `Running` state before proceeding
$ kubectl create -f cluster.yaml