dockerspawner throwing exception

[Z]

Trying to run dockerspawner with jwtauthentication. Authentication works fine but I get an exception whenever a user tries to start the server. 

   client = docker.APIClient(**kwargs)

      File "/usr/local/lib/python3.4/site-packages/docker/api/client.py", line 149, in __init__

        self._version = self._retrieve_server_version()

      File "/usr/local/lib/python3.4/site-packages/docker/api/client.py", line 176, in _retrieve_server_version

        'Error while fetching server API version: {0}'.format(e)

    docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

config :

c.NotebookApp.open_browser = False

c.NotebookApp.ip='*'

c.NotebookApp.port = 8888

c.NotebookApp.token = u''

c.Authenticator.admin_users = {'jupyter'}

c.LocalAuthenticator.create_system_users = True

c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'

c.JupyterHub.authenticator_class = 'jwtauthenticator_new.jwtauthenticator.JSONWebTokenLocalAuthenticator'

from jupyter_client.localinterfaces import public_ips

c.JupyterHub.hub_ip = public_ips()[0]

c.Spawner.mem_limit = '2G'

c.DockerSpawner.host_ip = "0.0.0.0"

~                                   

Is there anything else that I have to add to get dockerspawner working? 

[MinRK]

Is docker running on the machine? That suggests that perhaps the default `/var/run/docker.sock` doesn't exist.

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