CVAT on K8s: documentation improvement

[gioargyr]

Hello,

I have an on premise Kubernetes cluster and I deployed CVAT according to this documentation: https://docs.cvat.ai/docs/administration/advanced/k8s_deployment_with_helm/
There are 2 points in the documentation that would be nice to improve.

Issue 1
In the last sections where you describe "How to use existing PersistentVolume...", I quickly realized that this PVC needs to have access mode "RWX", as it is going to be used by the following Pods:

• cvat-backend-server
• cvat-backend-worker-export
• cvat-backend-worker-import
• cvat-backend-worker-annotation
• cvat-backend-worker-utils
• cvat-backend-worker-chunks

It would be nice if you document this, as it is crucial for the creation of the PVC before attempting to deploy CVAT with Helm.

Issue 2
In the same section, the yaml of values you propose is erroneous. If you use the yaml you propose when CVAT is deployed an error message is shown that cvat-backend-worker-utils and cvat-backend-worker-chunks are not deployed. In order to fix that:

• The whole utils block should be indented by one tab more to the right.
• A chunks block should be added.
  This is what worked for me:

cvat:
  backend:
    permissionFix:
      enabled: false
    defaultStorage:
      enabled: false
    server:
      additionalVolumes:
        - name: cvat-backend-data
          persistentVolumeClaim:
            claimName: my-claim-name
    worker:
      export:
        additionalVolumes:
          - name: cvat-backend-data
            persistentVolumeClaim:
              claimName: my-claim-name
      import:
        additionalVolumes:
          - name: cvat-backend-data
            persistentVolumeClaim:
              claimName: my-claim-name
      annotation:
        additionalVolumes:
          - name: cvat-backend-data
            persistentVolumeClaim:
              claimName: my-claim-name
      utils:
        additionalVolumes:
          - name: cvat-backend-data
            persistentVolumeClaim:
              claimName: my-claim-name
      chunks:
        additionalVolumes:
          - name: cvat-backend-data
            persistentVolumeClaim:
              claimName: my-claim-name