Your first volume

1. Create a pool

An SDSClusterPool specifies which drives on each node are used for storage. Use stable paths (/dev/disk/by-id/...) or, for NVMe, PCI addresses.

apiVersion: quasarsds.io/v1
kind: SDSClusterPool
metadata:
  name: fast-pool
spec:
  checksumProtection: true
  nodes:
    - nodeName: node-a
      raidType: raid1
      disks:
        - { path: /dev/disk/by-id/<disk-1>, driver: uring }
        - { path: /dev/disk/by-id/<disk-2>, driver: uring }
    - nodeName: node-b
      raidType: none
      disks:
        - { path: "0000:1b:00.0", driver: nvme }
    - nodeName: node-c
      raidType: none
      disks:
        - { path: "0000:1b:00.0", driver: nvme }

raidType sets the local RAID inside each node: none, raid0, raid1 or raid5. It is independent of replication across nodes.

kubectl apply -f pool.yaml
kubectl get sdsclusterpool fast-pool

Wait until every node in the pool is in the Ready phase.

2. Create a StorageClass

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: quasarsds-rf3
provisioner: quasarsds.io
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer
parameters:
  poolName: fast-pool
  strategy: RF3

3. Create a PVC and use it

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-volume
spec:
  accessModes: [ReadWriteOnce]
  storageClassName: quasarsds-rf3
  resources:
    requests:
      storage: 10Gi
---
apiVersion: v1
kind: Pod
metadata:
  name: test
spec:
  containers:
    - name: app
      image: busybox
      command: ["sh", "-c", "echo hello > /data/test && sleep 3600"]
      volumeMounts:
        - { name: data, mountPath: /data }
  volumes:
    - name: data
      persistentVolumeClaim:
        claimName: my-volume

kubectl get pvc my-volume
kubectl get sdsvolumes -n quasarsds-system