Check nfs

[khareRajshree]

Description

This PR includes the changes for implementation of checkNFS method in service.go which will verify whether the underlying array supports nfs.

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
• Backward compatibility is not broken

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

• Installed csi-powerflex driver with 4.0 array with nfsAcls and externalAccess configured in the config.yaml/values.yaml and with nas name configured in the secret, successful call made for checkNFS().

k describe pod vxflexos-controller-7f578b6749-jxm7s -n vxflexos

 driver:
   Container ID:  containerd://dbe4aea6483d58722b390f4fa0a5d31b5d448533ced3c44e2348eb3580327d8b
   Image:         amaas-eos-mw1.cec.lab.emc.com:5036/csi-vxflexos:vnfs-support
   Image ID:      amaas-eos-mw1.cec.lab.emc.com:5036/csi-vxflexos@sha256:4f33a61db8e8a1137eea116baf68de6a713d47a3683c35bf5da9ce34cafb8e05
   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:      Tue, 25 Apr 2023 04:49:13 -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_NFS_ACLS:                           0777
     X_CSI_POWERFLEX_EXTERNAL_ACCESS:          10.247.96.84
   Mounts:
     /var/run/csi from socket-dir (rw)
     /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-89jwr (ro)
     /vxflexos-config from vxflexos-config (rw)
     /vxflexos-config-params from vxflexos-config-params (rw)

controller logs for driver container:

k logs vxflexos-controller-7f578b6749-6nlw4 -n vxflexos -c driver

I0425 08:49:11.705190       1 leaderelection.go:248] attempting to acquire leader lease vxflexos/driver-csi-vxflexos-dellemc-com...
I0425 08:49:30.129447       1 leaderelection.go:258] successfully acquired lease vxflexos/driver-csi-vxflexos-dellemc-com
time="2023-04-25T08:49:30Z" level=info msg="configured 05d539c3cdc5280f" allSystemNames= endpoint="https://10.225.109.54" isDefault=true nasName=0xc0003e0c30 nfsAcls=0777 password="********" skipCertificateValidation=true systemID=05d539c3cdc5280f user=admin
time="2023-04-25T08:49:30Z" level=info msg="driver configuration file " file=/vxflexos-config-params/driver-config-params.yaml
time="2023-04-25T08:49:30Z" level=info msg="Read CSI_LOG_FORMAT from log configuration file" format=text
time="2023-04-25T08:49:30Z" level=info msg="Read CSI_LOG_LEVEL from log configuration file" fields.level=debug
time="2023-04-25T08:49:30Z" level=info msg="array configuration file" file=/vxflexos-config/config
time="2023-04-25T08:49:30Z" level=info msg="Probing all arrays. Number of arrays: 1"
time="2023-04-25T08:49:30Z" level=info msg="Found Name for system=block-legacy-gateway with ID=05d539c3cdc5280f"
time="2023-04-25T08:49:30Z" level=info msg="default array is set to array ID: 05d539c3cdc5280f"
time="2023-04-25T08:49:30Z" level=info msg="05d539c3cdc5280f is the default array, skipping VolumePrefixToSystems map update. \n"
time="2023-04-25T08:49:30Z" level=info msg="array 05d539c3cdc5280f probed successfully"
time="2023-04-25T08:49:30Z" level=info msg="configured csi-vxflexos.dellemc.com" IsApproveSDCEnabled=false IsHealthMonitorEnabled=false IsSdcRenameEnabled=false allowRWOMultiPodAccess=false autoprobe=true externalAccess=10.247.96.84 mode=controller nfsAcls=0777 privatedir=/dev/disk/csi-vxflexos sdcGUID= sdcPrefix= thickprovision=false