An administrator has upgraded to vSphere 6.5 and also wants to use Kerberos authentication for NFS.
Which can be done to the existing NFSv3 volumes to enable this feature?
A.
Perform a storage rescan on VMFS volumes.
B.
Unmount the NFSv3 datastore, and then mount as NFSv4.1 datastore.
C.
Nothing. All NFSv3 mounted datastores are upgraded automatically during vSphere upgrades.
D.
Perform a scan of new storage devices.
B
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Correct: B
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Yes B.
Explanation:
NFS 3 does not support access to NFS volumes via non-root credentials. You must provide each host root access to the volume.
NFS 4.1 supports Kerberos authentication protocol and the use of non-root users to access files when used with Kerberos.
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In addition, crossmounting (one host mounting as NFS3 and one as NFS4) will result in corruption.
So the correct procedure is to first unmount the datastore from all hosts. Then, provided the NAS supports it, re-mount as NFS 4.1
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The assumption here that NAS supports v4.1 is a key here. So, if it’s correct, then yes, but can we assume that ? There’s no such a hint in the question…
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The same datastore cannot be mounted for a greater NFS version just at a snap of a finger, – the storage provider (an NFS server or NAS appliance) has to be able to support it. If it’s formatted as NFS v3, it has to be re-formatted to v4.1 first.
As such, ‘A’ seems to be a better choice in the lack of other options as it may reveal available NFS 4.1 file systems that can be mounted as datastore(s).
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