Install voila package on datahub

[chrispyles]

Is it possible to get voila (https://github.com/QuantStack/voila) enabled on the Hub? There is an app we want to run for Data 88 in Fall 2019 using it.

[ryanlovett]

I think so. It depends on jupyter_server which has the note:

jupyter_server is an early developer preview, and is not suitable for general usage yet. Features and implementation are subject to change. Please use the stable notebook server for production usecases.

Just in case you weren't aware... We can install it regardless.

[chrispyles]

There is also appmode if you think that jupyter_server isn't a good idea

[yuvipanda]

@ryanlovett it is an optional dependency, we can just use the serverextension instead. It depends on jupyter_server only if you want to run it in standalone mode, which we don't wanna anyway

[ericvd-ucb]

Hey @ryanlovett can we bump this up? not urgent but still desired

[ryanlovett]

@ericvd-ucb voila pulls in jupyter_server as an install dependency and that is breaking nbpdfexport.bundler. I need to figure out why...

Step 36/51 : RUN jupyter bundlerextension enable nbpdfexport.bundler --sys-prefix --py
 ---> Running in 3de47db959a7
Traceback (most recent call last):
  File "/srv/app/venv/bin/jupyter-bundlerextension", line 7, in <module>
    from jupyter_server.bundler.bundlerextensions import main
ModuleNotFoundError: No module named 'jupyter_server.bundler'
Removing intermediate container 3de47db959a7
The command '/bin/sh -c jupyter bundlerextension enable nbpdfexport.bundler --sys-prefix --py' returned a non-zero code: 1Traceback (most recent call last):
  File "/root/repo/venv/bin/hubploy", line 11, in <module>
    load_entry_point('hubploy==0.1.0', 'console_scripts', 'hubploy')()
  File "/root/repo/venv/lib/python3.6/site-packages/hubploy/__main__.py", line 62, in main
    imagebuilder.build_deployment(client, args.deployment, args.commit_range, args.check_registry, args.push)
  File "/root/repo/venv/lib/python3.6/site-packages/hubploy/imagebuilder.py", line 109, in build_deployment
    build_if_needed(client, image_path, image_name, commit_range, check_registry, push)
  File "/root/repo/venv/lib/python3.6/site-packages/hubploy/imagebuilder.py", line 97, in build_if_needed
    build_image(client, path, image_spec, cache_from, push)
  File "/root/repo/venv/lib/python3.6/site-packages/hubploy/imagebuilder.py", line 47, in build_image
    r2d.build()
  File "/root/repo/venv/lib/python3.6/site-packages/repo2docker/app.py", line 673, in build
    raise docker.errors.BuildError(l['error'], build_log='')
docker.errors.BuildError: The command '/bin/sh -c jupyter bundlerextension enable nbpdfexport.bundler --sys-prefix --py' returned a non-zero code: 1
Exited with code 1

Edit: voila was installed via pip. No server or lab extensions had been installed yet.

[chrispyles]

Hey is there an update on getting the server extension installed? We have a notebook deploying in Data 88 at the end of September that would really benefit from this!

[ericvd-ucb]

Hi - i talked to @yuvipanda about it yesterday - he said it may take some fiddling on the install and he will look into it when he can, potentially we would like to demo this in class in late September

[yuvipanda]

This is present now.

[yuvipanda]

Voila was removed (see #2688 (comment)).