JupyterHub HPC Meeting - December 2021#

Welcome to the Meeting#

Hello! If you are joining the team video meeting, sign in below so we know who was here. Roll call:

  • name / institution / GitHub handle

  • Rollin Thomas / NERSC / @rcthomas

  • Félix-Antoine Fortin / Université Laval - Compute Canada / @cmd-ntrf

  • Simon Li / University of Dundee / @manics

  • Eskild Eriksen / Quansight / @iameskild

  • Jens Henrik Goebbert / Jülich Supercomputing Centre / @jhgoebbert

  • Richard Darst / Aalto University / @rkdarst

  • Michael Milligan / University of Minnesota / @mbmilligan

  • Chadi Abi Fadel / Ameritcan University of Beirut / @real-slim-chadi

    • I would like to have a feel of the community

Quick updates#

60 second updates on things you have been up to, questions you have, or developments you think people should know about. This is also a chance to suggest a future presentation if you’ve got work currently in progress you might want to share. Please add yourself, and if you do not have an update to share, you can pass.

  • Name: Your update

  • Rollin ISC HPC 2022: Interactive HPC Workshop

    • https://www.isc-hpc.com/

    • Program committee members?

      • add name here if interested:

        • Michael Milligan

        • Jens Henrik Göbbert

        • Félix-Antoine Fortin

    • Paper drafting exercise as part of the workshop

Reports and celebrations#

This is a place to make announcements (without a need for discussion). This is also a great place to give shout-outs to contributors! We’ll read through these at the beginning of the meeting.

  • Name: Your report or celebration

  • [name=Min (not here)] just published JupyterHub 2.0

    • woohoo!

    • RBAC (role-based access control): More fine grained permissions in the hub

    • How parameters are passed by the spawner, now environment variables only: may be a breaking change for some. But it’s a lot more future-proof

    • JupyterLab is the default

Agenda items#

Let’s collect all potential agenda items here before the start of the meeting. We will then attempt to create a coherent agenda that fits in the 60m meeting slot. If there are similar items try and group them together.

  • All: Standing project items:

    • Batchspawner check-in: Issues and PRs

    • Wrapspawner check-in: Issues and PRs

      • jupyterhub/wrapspawner#44

      • Having to vivify the self.child_spawner.server

      • Action:

        • Start a PR to fix this (Rollin will)

        • Tag all relevant issues in that PR

        • Have discussion in the PR about this to see if there’s a better fix

  • JupyterHub 2.0 tests

    • Felix tested w/BatchSpawner. Didn’t need any code changes to work! How encouraging!

    • Folks will test with WrapSpawner

  • JupyterLab 3 and Batchspawner - status?

  • Notebook servers on login nodes

    • Can you put remote kernels on compute nodes

    • Use kernel gateway to connect

    • BatchSpawner for this?

      • Not set out to support this…

      • Could be modified

    • Job would run kernel gateway

    • Lab needs to know how to find it

    • What if there are multiple jobs running

    • Felix suggests:

      • Notebook on the login node

      • Job is running another notebook server for the kernels

      • Could be hacked, but is this a thing?

    • ~~sshkernenl?: NII-cloud-operation/sshkernel~~ not relevant