powerflex: support added for NFS

[khareRajshree]

Description

Changes added for NFS support in PowerFlex.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#763

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have maintained backward compatibility

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Unit test (refer GitHub actions workflow)
• Functional test, executed 1vol-nfs helm test

controller pod with env vars set for driver:

driver:
    Container ID:  containerd://b2939bxxxxxxxxxxxx
    Image:         <local-artifactory>:5036/csi-vxflexos:vmain-latest
    Image ID:      <local-artifactory>:5036/csi-vxflexos@sha256:c23420xxxxxxxxxxxx
    Port:          <none>
    Host Port:     <none>
    Command:
      /csi-vxflexos.sh
    Args:
      --leader-election
      --array-config=/vxflexos-config/config
      --driver-config-params=/vxflexos-config-params/driver-config-params.yaml
    State:          Running
      Started:      Mon, 07 Aug 2023 08:40:10 -0400
    Ready:          True
    Restart Count:  0
    Environment:
      CSI_ENDPOINT:                             /var/run/csi/csi.sock
      X_CSI_MODE:                               controller
      X_CSI_VXFLEXOS_ENABLESNAPSHOTCGDELETE:    false
      X_CSI_VXFLEXOS_ENABLELISTVOLUMESNAPSHOT:  false
      SSL_CERT_DIR:                             /certs
      X_CSI_HEALTH_MONITOR_ENABLED:             false
      X_CSI_NFS_ACLS:                           0777
      X_CSI_POWERFLEX_EXTERNAL_ACCESS:
      X_CSI_QUOTA_ENABLED:                      true

1vol-nfs test events:

Events:
  Type    Reason                  Age   From                     Message
  ----    ------                  ----  ----                     -------
  Normal  Scheduled               22s   default-scheduler        Successfully assigned helmtest-vxflexos/vxflextest-0 to worker-1-k8vqcgtjmfu8k.domain
  Normal  SuccessfulAttachVolume  20s   attachdetach-controller  AttachVolume.Attach succeeded for volume "k8s-46a5c22bc9"
  Normal  Pulling                 14s   kubelet                  Pulling image "docker.io/centos:latest"
  Normal  Pulled                  14s   kubelet                  Successfully pulled image "docker.io/centos:latest" in 533.962187ms (533.981681ms including waiting)
  Normal  Created                 14s   kubelet                  Created container test
  Normal  Started                 14s   kubelet                  Started container test
10.x.x.x:/k8s-46a5c22bc9   8388608  1582336   6806272  19% /data0
10.x.x.x:/k8s-46a5c22bc9 on /data0 type nfs4 (rw,relatime,vers=4.2,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=10.x.x.x,local_lock=none,addr=10.x.x.x)

[bharathsreekanth]

I see some internal IPs listed in the output of how it was tested. Let us try to avoid posting those IPs in PRs, etc.

[khareRajshree]

I see some internal IPs listed in the output of how it was tested. Let us try to avoid posting those IPs in PRs, etc.

Done.