server/rook/data/data-filesystem.yaml

apiVersion: ceph.rook.io/v1
kind: CephFilesystem
metadata:
  name: data
  namespace: rook-ceph
spec:
  metadataPool:
    replicated:
      size: 3
  dataPools:
    - replicated:
        size: 1
  metadataServer:
    activeCount: 1
    activeStandby: true
    placement:
      nodeAffinity:
        requiredDuringSchedulingIgnoredDuringExecution:
          nodeSelectorTerms:
          - matchExpressions:
            - key: storage-node
              operator: In
              values:
              - "true"
      tolerations:
      - key: storage-node
        operator: Exists
    priorityClassName: system-cluster-critical
    resources:
      limits:
        cpu: "2"
        memory: 4Gi
      requests:
        cpu: "1"
        memory: 4Gi