Mount different volumes based on userlist/group

Is it possible to mount different images based on the username/group (provided by ldapauthenticator in my case).

I currently have a config as follows, but would need a 4th (shared) volume for a selected group of users.

c.DockerSpawner.volumes = {
                       'jupyterhub-userhome-{username}': { 'bind': notebook_dir , 'mode': 'rw'},
                       'jupyterhub-user-{username}': { 'bind': notebook_dir + 'work/' , 'mode': 'rw'},
                       'juypterhub-shared-data': { 'bind': '/home/jovyan/work/shared-ro', 'mode': 'ro'},
}

I wouldn’t mind to hardcode these users in the config as they almost never change.

I tried using a dict using templating to select the correct value - but it seems that templating does not apply here and jupyterhub fails to start.

volumedict = {'superuser': {
                        'jupyterhub-userhome-{username}': { 'bind': notebook_dir , 'mode': 'rw'},
                        'jupyterhub-user-{username}': { 'bind': notebook_dir + 'work/' , 'mode': 'rw'},
                        'juypterhub-shared-data': { 'bind': '/home/jovyan/work/shared-ro', 'mode': 'ro'},
                        'jupyterhub_test_mount': { 'bind': '/home/jovyan/test', 'mode': 'rw'},

                },
              'other': {
                        'jupyterhub-userhome-{username}': { 'bind': notebook_dir , 'mode': 'rw'},
                        'jupyterhub-user-{username}': { 'bind': notebook_dir + 'work/' , 'mode': 'rw'},
                        'juypterhub-shared-data': { 'bind': '/home/jovyan/work/shared-ro', 'mode': 'ro'},
                        }
                }
c.DockerSpawner.volumes = volumedict['{% "superuser" if username == "xmatthias" else "other"%}']

[cmseal]

@xmatthias this now works for me. Hope it helps you!

from dockerspawner import DockerSpawner
class MyDockerSpawner(DockerSpawner):
    team_map = {
        'username1': 'team-a',
        'username2': 'team-b',
        'username3': 'team-a',
    }

    def start(self):
        if self.user.name in self.team_map:
            team = self.team_map[self.user.name]
            # add team volume to volumes
            self.volumes['/directory/jupyterhub-team-{}'.format(team)] = {
                'bind': '/home/jovyan/teamfolder',
                'mode': 'rw',  # or ro for read-only
            }
        return super().start()

c.JupyterHub.spawner_class = MyDockerSpawner

[cmseal]

@jameholme If you just want a single shared folder that all users have read/write access to, you could add this to your jupyterhub_config.py:

c.DockerSpawner.volumes = { 'jupyterhub-user-{username}':'/home/jovyan/work', 'jupyterhub-shared':'/home/jovyan/shared', }

This assumes you already have 'jupyterhub-user-{username}':'/home/jovyan/work', as a docker volume per user… if not, just omit that bit.

The earlier code is for having separate volumes for groups/teams. If you don’t need that, you don’t need any of that code, and just the line above.

Note: depending on your setup, you may have to create the jupyterhub-shared volume from the docker cli before it can be used, and I’ve also previously had to manually set file permissions inside the volume before users could actually write to it. Again, this may depend on your setup and configuration. Hope this helps!