Options independent of any profile

[miwig]

Proposed change

It would be nice if we could define options that are independent of any profile. If profiles are defined, these options should apply to all profiles.

Alternative options

If profiles are not needed and only independent options are desired, a somewhat ugly workaround would be to have a single profile and define the options there. If both profiles and independent options are needed, the only solution is to duplicate the "independent" options into each profile.

Who would use this feature?

Admins that want to give users more fine-grained control over spawn options, e.g. independent settings for CPU limit, image, etc.

Suggest a solution

Mostly duplicating the functionality of profile_options to work without a profile, possibly

• Add a new traitlet option_list that is either a Dict of the same format as profile_options or a callable that returns such a Dict
• Change options_from_form to accept these options
• Adapt the default jinja template to render these options
• Adapt load_user_options to apply the overrides in the same way as profile_options are applied

If you agree that this is a desirable feature and I haven't overlooked anything, I'd be happy to attempt a PR :)

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[manics]

The options set directly on KubeSpawner should already be inherited by all the profiles. Can you give us an example of your desired configuration?

[miwig]

As I understand it, setting options directly on KubeSpawner allows a static configuration, which is modified by the selected profile and further customizable by the user using profile_options. What I would like is to let the user select options, e.g. the CPU limit, independent of a profile. It seems that this is not currently possible.

[dimm0]

I currently have this form for users. They can pick memory, gpus, region etc, and also pick an image.
The way I do it now is super ugly and breaks with every spawner update. It would be nice to have something like this officially supported.