Use fixed NFS dns name

[IronPan]

No description provided.

[k8s-ci-robot]

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[idealhack]

/ok-to-test
/lgtm
/assign @idvoretskyi

[idvoretskyi]

/lgtm

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: idealhack, idvoretskyi, IronPan

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[sdanbury]

@IronPan apologies to mention you randomly. Does k8s handle the NFS server DNS lookup nicely now? Up until now, you have had to specify the IP of the nfs service, rather than reference the DNS name. For example: kubernetes/minikube#3417.

[ensonic]

Still does not work. See eg. kubernetes/minikube#3417

[adthonb]

Still doesn't work with DNS, use Service's Cluster-IP instead.