Installing Ceph Storage Class

Before Rook can provision storage, create a StorageClass and CephBlockPool to allow Kubernetes to interoperate with Rook when it provisions persistent volumes.

apiVersion: ceph.rook.io/v1
kind: CephBlockPool
metadata:
  name: replicapool
  namespace: rook-ceph
spec:
  failureDomain: host
  replicated:
    size: 3
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: rook-ceph-block
provisioner: rook-ceph.rbd.csi.ceph.com
parameters:
    # clusterID is the namespace where the rook cluster is running
    # If you change this namespace, also change the namespace below where the secret namespaces are defined
    clusterID: rook-ceph

    # If you want to use erasure coded pool with RBD, you need to create
    # two pools. one erasure coded and one replicated.
    # You need to specify the replicated pool here in the `pool` parameter, it is
    # used for the metadata of the images.
    # The erasure coded pool must be set as the `dataPool` parameter below.
    #dataPool: ec-data-pool
    pool: replicapool

    # RBD image format. Defaults to "2".
    imageFormat: "2"

    # RBD image features. Available for imageFormat: "2". CSI RBD currently supports only `layering` feature.
    imageFeatures: layering

    # The secrets contain Ceph admin credentials. These are generated automatically by the operator
    # in the same namespace as the cluster.
    csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
    csi.storage.k8s.io/provisioner-secret-namespace: rook-ceph
    csi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisioner
    csi.storage.k8s.io/controller-expand-secret-namespace: rook-ceph
    csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
    csi.storage.k8s.io/node-stage-secret-namespace: rook-ceph
    # Specify the filesystem type of the volume. If not specified, csi-provisioner
    # will set default as `ext4`.
    csi.storage.k8s.io/fstype: ext4
# uncomment the following to use rbd-nbd as mounter on supported nodes
# **IMPORTANT**: If you are using rbd-nbd as the mounter, during upgrade you will be hit a ceph-csi
# issue that causes the mount to be disconnected. You will need to follow special upgrade steps
# to restart your application pods. Therefore, this option is not recommended.
#mounter: rbd-nbd
allowVolumeExpansion: true
reclaimPolicy: Delete

For more information, see block storage.