Volume name template

JupyterHub Zero to JupyterHub on Kubernetes
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1

Hi jovyans on k8s,

I have tried setting a value for singleuser.storage.dynamic.volumeNameTemplate as described in the configuration reference. However the names of the dynamically created volumes are not following the template.

Here is a snippet from my config.yaml:

singleuser:
  storage:
      capacity: 5Gi
      dynamic:
        storageClass: jupyterhub-user-ssd
        volumeNameTemplate: volume-{username}

Is the config flawed?

2

I just hit this same problem using AWS EFS, I think that volumeNameTemplate changes the Volume of the pod as seen by kubernetes, but not the underlying name of the created folder. Volumes | Kubernetes

I was able to get the folder to have the right name with config like this:

singleuser:
  storage:
    type: "static"
    static:
      pvcName: "efs-pvc"
      subPath: "{username}"

Follow on question: is there a drawback to having all users share one PVC instead of doing dynamic?

3

In our case we have users spawning on distinct phyiscal nodes in the cluster, and most volumes cannot be mounted on several machines at once.

4

If you want to vary the amount of storage a user has, it may be more difficult with a static pvc.