Is it feasible to launch a single user server using a conda environment's
notebook version with something like LocalProcessSpawner? The API doc for
LocalProcessSpawner's cmd option says:
This is usually set if you want to start the single-user server in a
> different python environment (with virtualenv/conda) than JupyterHub itself.
>
Does anyone know of an example of doing this? I tried activating the conda
environment and then running jupyterhub-singleuser, e.g.:
from jupyterhub.spawner import LocalProcessSpawner
c.LocalProcessSpawner.options_form = \
"""
Choose an environment:
<select name="env" multiple="true">
<option value="default">Default</option>
<option value="alternate">Alternate</option>
</select>
"""
def activate_env(spawner):
env = spawner.user_options.get('env')[0]
if env == 'alternate':
spawner.cmd = [
'bash', '-c',
'source activate alternate && jupyterhub-singleuser'
]
c.LocalProcessSpawner.pre_spawn_hook = activate_env
import subprocess
c.LocalProcessSpawner.popen_kwargs = dict(stdout=subprocess.PIPE)
c.JupyterHub.spawner_class = LocalProcessSpawner
but the single-user server fails and I see this:
[C 2017-11-27 13:39:01.834 SingleUserNotebookApp application:90] Bad config
encountered during initialization:
[C 2017-11-27 13:39:01.834 SingleUserNotebookApp application:91] The 'ip'
trait of a SingleUserNotebookApp instance must be a unicode string, but a
value of None <class 'NoneType'> was specified.
Choosing the "Default" option in the form works. This makes me think
possibly JupyterHub's SingleUserNotebookApp isn't fully compatible with
notebook 4.* or something. I could also easily be doing something wrong.
On Tuesday, November 21, 2017 at 5:51:45 PM UTC-8, Ryan Lovett wrote:
>
> One possible solution would be to containerize your 2014 and post-2014
> environments, and configure your JupyterHub to use a container-based
> spawner.
>
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