How to use manage groups

JupyterHub Zero to JupyterHub on Kubernetes
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Hello, I’m new in Z2JH. I want to use group to manage students, but I don’t find any explanation of this manage groups. Is there any documentation for this feature? For example, what does KeyValue mean in image .
Any help will be greatly appreciated! :slight_smile:

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The Key value section is so you can add additional metadata to the group

By default JupyterHub doesn’t do anything with it, but custom spawners could make use of it.

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Thank you very much for your reply. I have read the link you provided, but my understanding of JupyterHub may not be deep enough, so I don’t fully grasp the examples in the link :sob:. I’m not sure if my following idea is correct. The specific problem I’m facing now is that I have two different GPU cards, such as a 4090 and a 3090, and I hope to allocate the 4090 to Group A and the 3090 to Group B. Does this mean I need to set corresponding Keys and Values in manage_group, and then rewrite the pre_spawn_hook function in the profileList of the jupyterhub.yaml file (as shown in the figure below) to call the corresponding Keys and Values for allocation? Or is there a more recommended and simpler way? I’m looking forward to your reply with great expectation. :slightly_smiling_face:

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I think you can use KubeSpawner.group_overrides for that:

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Thank you very much for your response. I will try to resolve this issue. :grinning_face:

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Hello, I tried using the group_override method in KubeSpawner (as you suggested) to solve the issue I mentioned earlier (where students of different levels should only be able to select GPU cards corresponding to their level). However, I encountered some problems:

  1. Issue with Syntax or Configuration:
    In Image 1, I created a test example based on the documentation’s sample code
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    . I’m unsure if my syntax errors caused the “Spawn Failed” error shown in Image 2.
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    Could you please review and correct my approach?
  2. Missing jupyterhub_config.py File:
    I noticed that all the examples you provided reference the jupyterhub_config.py file. However, while setting up JupyterHub on Kubernetes from scratch, I’ve never encountered this file. Could this absence be impacting my ability to resolve this issue?
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If you can share similar specific examples with actual code snippets (rather than images) or error details, I can help diagnose the problem more effectively! Thank you.:blush: