- You had a running rook/ceph cluster, suddenly your Kubernetes environment exploded, you have to start a new Kubernetes environment and put your existing rook/ceph cluster back.
- You are migrating your existing rook/ceph cluster to a new Kubernetes environment, downtime can be tolerated.
In author's situation, etcd
data of running Kubernetes cluster is nuked and have no backup, all OSDs are using bluestore backend.
- A working Kubernetes cluster without rook