singleuser.storage.homeMountPath not working?

[BlueCog]

Bug description
When setting singleuser.storage.homeMountPath: to: /opt/app-root/src (https://z2jh.jupyter.org/en/stable/resources/reference.html#singleuser-storage-homemountpath)

The home directory is /opt/app-root (The Jupyter root dir) and not /opt/app-root/src.
Note: The personal pvc of the user is mounted to /opt/app-root/src so this works correctly.

The issue is that when a user spawns a Notebook the users starts in /opt/app-root and not in /opt/app-root/src.

When using older versions of the Helm Chart (v2) this was working correctly.

Expected behaviour
The home directory should be /opt/app-root/src

Actual behaviour
The home directory is /opt/app-root

personal set up

• k8s (OpenShift)
• hub is installed on: ubi8-minimal:8.7-1107

Settings:

    storage:
      capacity: 5Gi
      dynamic:
        pvcNameTemplate: personal-claim-{username}
      homeMountPath:  /opt/app-root/src    

[manics]

homeMountPath should only affect where the storage is mounted, it shouldn't affect the users $HOME directory or the starting directory for the notebook. How have you configured the home/starting directory? Is it built-in to your image?

[BlueCog]

Hello @manics Thanks for the quick reply!

Ok that makes sense... I guess the base image settings are forcing $HOME to /opt/app-root We are using new images since version 2 of the helm chart so that could also be the case.

I've tried to set $HOME in the z2jh Helm chart: singleuser.extraEnv. Now $HOME points to the right directory but the Lab environment is still starting at /opt/app-root. After some searching there was a flag for jupiter (--NotebookApp.notebook_dir) to configure this. But i'm not sure how this is works in the context of z2jh... Do you maybe have a pointer on this?

[BlueCog]

Update:

We are using singleuser.profilelist and i've found an notebook_dir setting in kubespawner. I'm able to force to start in /opt/app-root/src by setting: notebook_dir: "/opt/app-root/src" (under singleuser.profilelist.[].kubespawner_override:)

Not sure if this is the best / global way to go. But this works for us.

https://jupyterhub-kubespawner.readthedocs.io/en/latest/spawner.html#kubespawner.KubeSpawner.notebook_dir

[yuvipanda]

@BlueCog you can also try setting working_dir instead.