Difference in mounts type between c.SwarmSpawner.container_spec and user_options?

[isuftin]

This works:

mounts = [{
        'type': 'volume',
        'source': 'jupyterhub-user-{username}',
        'target': notebook_dir
    }]
    c.SwarmSpawner.container_spec = {
        'args': ['/usr/local/bin/start-singleuser.sh'],
        'Image': os.getenv('SINGLE_USER_IMAGE', 'jupyterhub/singleuser:latest'),
        'mounts': mounts
    }

This does not:

 mounts = [{
        'type': 'volume',
        'source': 'jupyterhub-user-{username}',
        'target': notebook_dir
    }]

    c.SwarmSpawner.use_user_options = True
    user_options = {
        'container_spec' : {
            'args': ['/usr/local/bin/start-singleuser.sh'],
            'Image': os.getenv('SINGLE_USER_IMAGE', 'jupyterhub/singleuser:latest'),
            'mounts': mounts,
            'placement' : ["node.Role == worker"],
            'network' : [os.getenv('SWARMSPAWNER_JUPYTERHUB_NETWORKS', 'jupyterhub_dlcc_network')],
            'name' : os.getenv('SWARMSPAWNER_JUPYTERHUB_SERVICE_NAME', 'jupyterhub_jupyterhub')
        }   
    }

Error seen:

jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |     Traceback (most recent call last):
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/tornado/web.py", line 1469, in _execute
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         result = yield result
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/jupyterhub/handlers/base.py", line 535, in get
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         yield self.spawn_single_user(current_user)
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/jupyterhub/handlers/base.py", line 328, in spawn_single_user
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         yield gen.with_timeout(timedelta(seconds=self.slow_spawn_timeout), f)
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/jupyterhub/user.py", line 261, in spawn
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         raise e
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/jupyterhub/user.py", line 229, in spawn
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         ip_port = yield gen.with_timeout(timedelta(seconds=spawner.start_timeout), f)
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |       File "/opt/conda/lib/python3.5/site-packages/swarmspawner-0.1.0-py3.5.egg/cassinyspawner/swarmspawner.py", line 285, in start
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |         for mount in self.container_spec['mounts']:
jupyterhub_jupyterhub.1.rv400s2ujiec@myservice    |     KeyError: 'mounts'

[isuftin]

Also, I want to make sure I understand how this works. Does the user_options dict go into the jupyterhub_config.py??

[barrachri]

Hi @isuftin

you can pass some specs for your instance using a form (the user can do this).

To accepts the passed parameters you need to set:

c.SwarmSpawner.use_user_options = True

Otherwise the parameters passed by the user (through the jupyterhub website) won't be accepted.

[isuftin]

@barrachri Ok thank you. Then this was a misunderstanding on my part as to the use of the user_options dict. I thought it was to go into the jupyterhub_config.py file.