Multiple storage classes for same provisioner

[samene]

We have multiple disks mounted on a node and depending on the type of storage requirement we want to create the local path pvc on a particular disk. Today we can specify multiple paths on a node via the nodePathMap: but the final path selection is random.

I propose to create multiple storage classes with a parameter of path that specifies the path to use. That way, using a storage class like below I can provision the storage on the right folder.

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ssd-local-path
  labels:
    app.kubernetes.io/name: local-path-provisioner
    helm.sh/chart: local-path-provisioner-0.0.23
    app.kubernetes.io/instance: local-path-provisioner
    app.kubernetes.io/version: "v0.0.23"
    app.kubernetes.io/managed-by: Helm
provisioner: cluster.local/local-path-provisioner
parameters:
  path: /data/ssd
volumeBindingMode: WaitForFirstConsumer
reclaimPolicy: Delete

If the path parameter is not found on the storage class, it falls back to existing behaviour.

[derekbit]

@samene
In general, LGTM.
Can you use a more specific name rather than path?
In addition, please update the README.md for the new parameter as well.
Thank you.

[derekbit]

v0.0.24 will be released by this Wed. Put in v0.0.25 if can't catch up with v0.0.24.

[samene]

@derekbit I have updated the README.md. Can you suggest a better name for the path parameter?

[derekbit]

@derekbit I have updated the README.md. Can you suggest a better name for the path parameter?

@samene
I don't have a better idea...nodePath might be more clear than path, WDYT?
BTW, can you help rebase and address the comment? I will releasev0.0.24 after getting this PR merged.
Thank you very much.

[derekbit]

LGTM.
@samene Thanks for your contribution.