feature: add support to set folderName on PVC

[vvanouytsel]

Whenever a PV is dynamically created, a directory is generated with the following name $persistentVolumeName_$persistentVolumeClaimNamespace_$persistentVolumeClaimName.

It would be helpful if we can decide what the directory name of the generated directory would be up front. This could be done by setting an annotation on the persistent volume claim.

annotations:
  folderName: fooBar

This logic is included in the following PR:
#372

[XtraLarge]

It would be great to consider also implement it in the automatic provisioner. Smething like use the namespace of the pvc so the PVs will automatically sorted in folders named by the namespace.

In my scenario I have four k3s-nodes in a lxc container runnig on a proxmox server. They all share one datadir where local-path autoprovision the pvs. This datadir is quit confusing because of the flat use of the volid as the name in that directory.

[senpro-ingwersenk]

Seconding this.

I finished bootstrapping a k3s cluster for a client and getting to the storage paths is a bit confusing. Not impossible, but it very much is not a whole lot of fun. For my own deployment at home, I plan to use the shared filesystem together with a permanent rclone mount, which I access from many locations. Being able to "predict" the name would be very helpful here when I need to dig into log files or the like.

Thanks!

[lizhifengones]

To reconsider this point, for example, we can mount different disks for different PVs to achieve IO isolation
But for my needs I don't need full customization, I just need subDirPath

[lizhifengones]

@derekbit PTAL
Are we still accepting any features?

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