To setup a storage-class and replica pool, import the storage-class for block storage.

Storage-Class for Block Storage YAML:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: rook-ceph-block
provisioner: ceph.rook.io/block
parameters:
  pool: replicapool
  # Specify the namespace of the rook cluster from which to create volumes.
  # If not specified, it will use `rook` as the default namespace of the cluster.
  # This is also the namespace where the cluster will be
  clusterNamespace: rook-ceph
  # Specify the filesystem type of the volume. If not specified, it will use `ext4`.
#  fstype: xfs

Apply storage-class for block storage to the Kubernetes Cluster using the Apply YAML option in the Cluster Settings menu.

Drop the storage-class.yaml file into the upload box or select the file from the directory.

Next, import the replica-pool setting manifest into the Kubernetes Cluster in the rook-ceph Environment.

Replica-Pool YAML Manifest:

apiVersion: ceph.rook.io/v1beta1
kind: Pool
metadata:
  name: replicapool
  namespace: rook-ceph
spec:
  failureDomain: host
  replicated:
    size: 2 

To import the replica-pool setting manifest, click the gear in the top right corner of the Running Application window and select the Import to Application option.

Drop the Replica-Pool YAML Manifest file into the upload box or select the file from the directory.

Verify that storage-class is configured on the cluster through the Nirmata shell.

Verify that the pool is set to a replication size of 2.