installer: add a test to ensure that CSI is working as expected prior to installing Gitpod

Is your feature request related to a problem? Please describe

Add a test to ensure that the CSI is working as expected prior to installing Gitpod

Describe the behaviour you'd like

Have a pre-installed/preflight test to ensure that the CSI is working as expected prior to installing Gitpod
The required CSI criteria are similar to #10201, here are the test criteria:

• Have a storage class with Delete policy? 🤔
• Have a volume snapshot class with Delete policy? 🤔
• Support CSI snapshot backup/restore without a problem.
  • Create Pod csi-test-pod with PVC csi-test-pvc, and write some data to the PVC csi-test-pvc.

    ---
    apiVersion: v1
    kind: Pod
    metadata:
      name: csi-test-pod
    spec:
      containers:
        - name: web-server
          image: nginx
          volumeMounts:
            - name: pvc
              mountPath: /var/lib/www/html
      volumes:
        - name: pvc
          persistentVolumeClaim:
            claimName: csi-test-pvc
            readOnly: false
    ---
    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: csi-test-pvc
    spec:
      accessModes:
        - ReadWriteOnce
      resources:
        requests:
          storage: 1Gi
      storageClassName: <name-from-config-storageClass>
    

  • Create VolumeSnapshot csi-test-vs for the PVC csi-test-pvc, it can back up the snapshot success, and the VolumeSnapshotContent be created.

    ---
    # 1.17 <= K8s <= v1.19
    # apiVersion: snapshot.storage.k8s.io/v1beta1
    # K8s >= v1.20
    apiVersion: snapshot.storage.k8s.io/v1
    kind: VolumeSnapshot
    metadata:
      name: csi-test-vs
    spec:
      volumeSnapshotClassName: <name-from-config-snapshotClass>
      source:
        persistentVolumeClaimName: csi-test-pvc
    

  • Delete Pod csi-test-pod and PVC csi-test-pvc.

    kubectl delete pvc csi-test-pvc
    kubectl delete pod csi-test-pod
    

  • Create another Pod csi-test-pod-restore and PVC csi-test-pvc-restore with data source as VolumeSnapshot csi-test-vs, and check the PVC csi-test-pvc-restore with correct data content.

    ---
    apiVersion: v1
    kind: Pod
    metadata:
     name: csi-test-pod-restore
    spec:
     containers:
       - name: web-server
         image: nginx
         volumeMounts:
           - name: pvc
             mountPath: /var/lib/www/html
     volumes:
       - name: pvc
         persistentVolumeClaim:
           claimName: csi-test-pvc-restore
           readOnly: false
    ---
    apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      name: csi-test-pvc-restore
    spec:
      storageClassName: <name-from-config-storageClass>
      dataSource:
        name: csi-test-vs
        kind: VolumeSnapshot
        apiGroup: snapshot.storage.k8s.io
      accessModes:
        - ReadWriteOnce
      resources:
        requests:
          storage: 1Gi
    

• Add CSI driver requirement to the Notion's Product Compatibility Matrix

Describe alternatives you've considered

N/A

Additional context

#10201
#7901

Start with the installer’s preflight checks and review the related CSI requirements in issues #10201 and #7901. The work is complete when the checks cover storage and snapshot class deletion policies, snapshot backup and restore with the described resources, and the CSI driver requirement is added to the Product Compatibility Matrix.