But docker-compose it’s not something that we would want to run in production. 
This is a development environment and the request is so that it would be as 
close to the production as a setup as possible. Therefore docker-compose it out 
of the question.

Regards,
Peter
On 18 Feb 2020, 22:09 +0200, Jason Anderson <[email protected]>, wrote:
> Ah yes, that would be the problem. The docs [1] give an example 
> docker-compose reference for the JupyterHub swarm service. It needs to have 
> access to the Docker socket and be placed on a manager node. You should be 
> able to just copy from the README.
>
> Cheers,
> /Jason
>
> [1]: https://github.com/jupyterhub/dockerspawner#swarmspawner
>
> On 2/18/20 2:01 PM, Peter Zoltan Keresztes wrote:
> > There is a mistake in here. The jupyterhub is not running in a container. 
> > It is running natively on the master node of the swarm cluster.
> >
> > Regards,
> > Peter
> > On 18 Feb 2020, 21:58 +0200, Jason Anderson <[email protected]>, 
> > wrote:
> > > Having never used Swarm, I'm not sure how to help at this point, though 
> > > it feels like something Swarm-related. I would keep the timeout quite 
> > > high and do some inspecting of the containers being started by the 
> > > swarmspawner. Make sure they are connected to the same network as the 
> > > JupyterHub container. You can also try deleting the service and the 
> > > network, then re-creating the network. Sometimes I have seen issues that 
> > > are only resolvable by re-creating a Docker network, whether due to 
> > > iptables or Linux bridges getting weird settings, I don't know.
> > >
> > > If you recreate the network with the --attachable flag you can also 
> > > attach other containers to it for debugging. You could use an attached 
> > > container to see if you can indeed hit the port on the Jupyter user 
> > > container. Given that the error appears to be DNS-related ("Name or 
> > > service not known"), I'd suspect that really it's something with the 
> > > containers not actually being connected to the same network, or the 
> > > network is misbehaving.
> > >
> > > Hope that helps.
> > > /Jason
> > >
> > > On 2/18/20 1:45 PM, Peter Zoltan Keresztes wrote:
> > > > Same error:
> > > >
> > > > [W 2020-02-18 14:43:52.180 JupyterHub user:510] zozo6015's server never 
> > > > showed up at http://jupyter-zozo6015:8888/user/zozo6015/ after 300 
> > > > seconds. Giving up
> > > > [E 2020-02-18 14:43:52.309 JupyterHub gen:974] Exception in Future 
> > > > <Task finished 
> > > > coro=<BaseHandler.spawn_single_user.<locals>.finish_user_spawn() done, 
> > > > defined at 
> > > > /srv/.jhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py:629> 
> > > > exception=TimeoutError("Server at 
> > > > http://jupyter-zozo6015:8888/user/zozo6015/ didn't respond in 300 
> > > > seconds",)> after timeout
> > > > Traceback (most recent call last):
> > > > File "/srv/.jhub/lib/python3.5/site-packages/tornado/gen.py", line 970, 
> > > > in error_callback
> > > > future.result()
> > > > File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
> > > > raise self._exception
> > > > File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
> > > > result = coro.send(None)
> > > > File 
> > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py", 
> > > > line 636, in finish_user_spawn
> > > > await spawn_future
> > > > File "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/user.py", line 
> > > > 528, in spawn
> > > > raise e
> > > > File "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/user.py", line 
> > > > 502, in spawn
> > > > resp = await server.wait_up(http=True, timeout=spawner.http_timeout)
> > > > File "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/utils.py", line 
> > > > 197, in wait_for_http_server
> > > > timeout=timeout
> > > > File "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/utils.py", line 
> > > > 155, in exponential_backoff
> > > > raise TimeoutError(fail_message)
> > > > TimeoutError: Server at http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > didn't respond in 300 seconds
> > > > On 18 Feb 2020, 21:30 +0200, Jason Anderson 
> > > > <[email protected]>, wrote:
> > > > > OK, then I would suggest to try raising the timeout and seeing if 
> > > > > that helps. Perhaps it is just taking longer than we would expect to 
> > > > > spawn the container. I think the settings are Spawner.http_timeout 
> > > > > (default=30) and Spawner.start_timeout (default=60). Try setting them 
> > > > > to 5 minutes or something quite high and see if that helps. If it 
> > > > > does, then maybe the spawn system is just taking a while to get 
> > > > > everything going.
> > > > >
> > > > > /Jason
> > > > >
> > > > > On 2/18/20 1:02 PM, Peter Zoltan Keresztes wrote:
> > > > > > The container is shutting down because the jupyterhub it is issuing 
> > > > > > the shutdown command after it fails connect to the container for 30 
> > > > > > seconds.Here are the logs for the container.
> > > > > >
> > > > > > root@jupyterhub:/srv/jupyterhub# docker logs -f 
> > > > > > jupyter-zozo6015.1.u5030s66gvd7rkt4af4bn6kux
> > > > > > Executing the command: jupyterhub-singleuser --ip="0.0.0.0" 
> > > > > > --port=8888
> > > > > > [W 2020-02-18 14:27:50.746 SingleUserNotebookApp configurable:168] 
> > > > > > Config option `open_browser` not recognized by 
> > > > > > `SingleUserNotebookApp`.  Did you mean `browser`?
> > > > > > [I 2020-02-18 14:27:52.760 SingleUserNotebookApp extension:158] 
> > > > > > JupyterLab extension loaded from 
> > > > > > /opt/conda/lib/python3.7/site-packages/jupyterlab
> > > > > > [I 2020-02-18 14:27:52.761 SingleUserNotebookApp extension:159] 
> > > > > > JupyterLab application directory is /opt/conda/share/jupyter/lab
> > > > > > [I 2020-02-18 14:27:53.666 SingleUserNotebookApp singleuser:406] 
> > > > > > Starting jupyterhub-singleuser server version 0.9.6
> > > > > > [I 2020-02-18 14:27:53.694 SingleUserNotebookApp notebookapp:1924] 
> > > > > > Serving notebooks from local directory: /home/jovyan
> > > > > > [I 2020-02-18 14:27:53.696 SingleUserNotebookApp notebookapp:1924] 
> > > > > > The Jupyter Notebook is running at:
> > > > > > [I 2020-02-18 14:27:53.697 SingleUserNotebookApp notebookapp:1924] 
> > > > > > http://6ea2c6d31f52:8888/user/zozo6015/
> > > > > > [I 2020-02-18 14:27:53.697 SingleUserNotebookApp notebookapp:1925] 
> > > > > > Use Control-C to stop this server and shut down all kernels (twice 
> > > > > > to skip confirmation).
> > > > > > [C 2020-02-18 14:28:20.462 SingleUserNotebookApp notebookapp:1615] 
> > > > > > received signal 15, stopping
> > > > > > [I 2020-02-18 14:28:20.472 SingleUserNotebookApp notebookapp:1784] 
> > > > > > Shutting down 0 kernels
> > > > > >
> > > > > > Regards,
> > > > > > Peter
> > > > > >
> > > > > > On Tuesday, 18 February 2020 20:56:50 UTC+2, Jason Anderson wrote:
> > > > > > > Hi Peter, those are the logs for JupyterHub itself, but do not 
> > > > > > > contain logs for the individual container (jupyter-zozo6015) - 
> > > > > > > you will probably have to use `docker logs` to get those. Maybe 
> > > > > > > that will contain some additional information. It looks like 
> > > > > > > JupyterHub is doing its job ok, but the user container is 
> > > > > > > immediately exiting (ExitCode: 0 in your posted logs.)
> > > > > > >
> > > > > > > /Jason
> > > > > > >
> > > > > > > On 2/18/20 11:55 AM, Peter Zoltan Keresztes wrote:
> > > > > > > > Already created the overlay network, I get the services up but 
> > > > > > > > for a very short time when the services ends with the following 
> > > > > > > > error:
> > > > > > > >
> > > > > > > >
> > > > > > > > [W 2020-02-18 09:51:34.551 JupyterHub utils:192] Failed to 
> > > > > > > > connect to http://jupyter-zozo6015:8888/user/zozo6015/ ([Errno 
> > > > > > > > -2] Name or service not known)
> > > > > > > > [W 2020-02-18 09:51:39.566 JupyterHub utils:192] Failed to 
> > > > > > > > connect to http://jupyter-zozo6015:8888/user/zozo6015/ ([Errno 
> > > > > > > > -2] Name or service not known)
> > > > > > > > [W 2020-02-18 09:51:41.553 JupyterHub utils:192] Failed to 
> > > > > > > > connect to http://jupyter-zozo6015:8888/user/zozo6015/ ([Errno 
> > > > > > > > -2] Name or service not known)
> > > > > > > > [W 2020-02-18 09:51:41.555 JupyterHub user:510] zozo6015's 
> > > > > > > > server never showed up at http://(:8888/user/zozo6015/ after 30 
> > > > > > > > seconds. Giving up
> > > > > > > > [D 2020-02-18 09:51:41.557 JupyterHub swarmspawner:144] Getting 
> > > > > > > > task of service 'jupyter-zozo6015'
> > > > > > > > [D 2020-02-18 09:51:41.558 JupyterHub dockerspawner:777] 
> > > > > > > > Getting container 'jupyter-zozo6015'
> > > > > > > > [D 2020-02-18 09:51:41.593 JupyterHub swarmspawner:133] Service 
> > > > > > > > 9ni1q9z status: {'ContainerStatus': {'ContainerID': 
> > > > > > > > '9480724f2d31d9fe8a784c99a17441f024ceba683951ad9be4e71766cf8499b7',
> > > > > > > >                          'ExitCode': 0,
> > > > > > > >                          'PID': 18817},
> > > > > > > >      'Message': 'started',
> > > > > > > >      'PortStatus': {},
> > > > > > > >      'State': 'running',
> > > > > > > >      'Timestamp': '2020-02-18T14:51:10.859533481Z'}
> > > > > > > > [I 2020-02-18 09:51:41.596 JupyterHub dockerspawner:1107] 
> > > > > > > > Stopping service jupyter-zozo6015 (id: 9ni1q9z)
> > > > > > > > [I 2020-02-18 09:51:41.597 JupyterHub swarmspawner:232] 
> > > > > > > > Removing service 9ni1q9zsp99khlvpbnl3x4qyx
> > > > > > > > [D 2020-02-18 09:51:41.653 JupyterHub user:578] Deleting oauth 
> > > > > > > > client jupyterhub-user-zozo6015
> > > > > > > > [E 2020-02-18 09:51:41.674 JupyterHub gen:974] Exception in 
> > > > > > > > Future <Task finished 
> > > > > > > > coro=<BaseHandler.spawn_single_user.<locals>.finish_user_spawn()
> > > > > > > >  done, defined at 
> > > > > > > > /srv/.jhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py:629>
> > > > > > > >  exception=TimeoutError("Server at 
> > > > > > > > http://jupyter-zozo6015:8888/user/zozo6015/ didn't respond in 
> > > > > > > > 30 seconds",)> after timeout
> > > > > > > >     Traceback (most recent call last):
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/tornado/gen.py", line 
> > > > > > > > 970, in error_callback
> > > > > > > >         future.result()
> > > > > > > >       File "/usr/lib/python3.5/asyncio/futures.py", line 293, 
> > > > > > > > in result
> > > > > > > >         raise self._exception
> > > > > > > >       File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in 
> > > > > > > > _step
> > > > > > > >         result = coro.send(None)
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py",
> > > > > > > >  line 636, in finish_user_spawn
> > > > > > > >         await spawn_future
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/user.py", 
> > > > > > > > line 528, in spawn
> > > > > > > >         raise e
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/user.py", 
> > > > > > > > line 502, in spawn
> > > > > > > >         resp = await server.wait_up(http=True, 
> > > > > > > > timeout=spawner.http_timeout)
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/utils.py", 
> > > > > > > > line 197, in wait_for_http_server
> > > > > > > >         timeout=timeout
> > > > > > > >       File 
> > > > > > > > "/srv/.jhub/lib/python3.5/site-packages/jupyterhub/utils.py", 
> > > > > > > > line 155, in exponential_backoff
> > > > > > > >         raise TimeoutError(fail_message)
> > > > > > > >     TimeoutError: Server at 
> > > > > > > > http://jupyter-zozo6015:8888/user/zozo6015/ didn't respond in 
> > > > > > > > 30 seconds
> > > > > > > >
> > > > > > > > Regards,
> > > > > > > > Peter
> > > > > > > >
> > > > > > > > On Tuesday, 18 February 2020 18:30:38 UTC+2, Jason Anderson 
> > > > > > > > wrote:
> > > > > > > > > Hi Peter,
> > > > > > > > >
> > > > > > > > > I don't have much experience with Docker Swarm, but this line 
> > > > > > > > > jumped out to me:
> > > > > > > > >
> > > > > > > > > root@jupyterhub:~# docker service ls
> > > > > > > > > ID                  NAME                MODE                
> > > > > > > > > REPLICAS            IMAGE                       PORTS
> > > > > > > > > wtq7n8hvymwf        jupyter-zozo6015    replicated          
> > > > > > > > > 0/1                 jupyterhub/singleuser:0.9
> > > > > > > > >
> > > > > > > > > Replicas still show that 0 are up. I would try to check out 
> > > > > > > > > the containers that are supposed to be running (`docker 
> > > > > > > > > container ls -a`) to see what is happening. I did a quick 
> > > > > > > > > StackOverflow search, you might find some help/ideas here[1].
> > > > > > > > >
> > > > > > > > > Long story short, I am not sure it is a problem specifically 
> > > > > > > > > with the JupyterHub setup. Though, I'm not sure what parts 
> > > > > > > > > need to be configured for Swarm to work. Another thing the 
> > > > > > > > > docs[2] mention is that the network needs to exist. Is it 
> > > > > > > > > created already?
> > > > > > > > >
> > > > > > > > > docker network create --driver overlay jupyterhub_network
> > > > > > > > >
> > > > > > > > > Hope that helps,
> > > > > > > > > /Jason
> > > > > > > > >
> > > > > > > > > [1]: 
> > > > > > > > > https://stackoverflow.com/questions/39284233/docker-service-replicas-remain-0-1
> > > > > > > > > [2]: 
> > > > > > > > > https://github.com/jupyterhub/dockerspawner/blob/master/README.md#swarmspawner
> > > > > > > > >
> > > > > > > > > On 2/18/20 4:29 AM, Peter Zoltan Keresztes wrote:
> > > > > > > > > > Is there anyone in here to help me with this issue I am 
> > > > > > > > > > struggling for more than a week with?
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > On Thursday, 13 February 2020 23:19:52 UTC+2, Peter Zoltan 
> > > > > > > > > > Keresztes wrote:
> > > > > > > > > > > hello,
> > > > > > > > > > >
> > > > > > > > > > > I am trying to convert the dockerspawner setup into 
> > > > > > > > > > > swarmspawner. All I am getting is timeout.
> > > > > > > > > > >
> > > > > > > > > > > The configuration I am using looking like this:
> > > > > > > > > > >
> > > > > > > > > > > # Configuration file for JupyterHub.*
> > > > > > > > > > > c.Application.log_level = 30
> > > > > > > > > > > c.JupyterHub.ssl_key = 
> > > > > > > > > > > '/etc/letsencrypt/live/jhub.z0z0.tk/privkey.pem'
> > > > > > > > > > > c.JupyterHub.ssl_cert = 
> > > > > > > > > > > '/etc/letsencrypt/live/jhub.z0z0.tk/fullchain.pem'
> > > > > > > > > > > c.JupyterHub.port = 443
> > > > > > > > > > >
> > > > > > > > > > > #from oauthenticator.github import 
> > > > > > > > > > > LocalGitHubOAuthenticator
> > > > > > > > > > > from oauthenticator.github import GitHubOAuthenticator
> > > > > > > > > > > c.JupyterHub.authenticator_class = GitHubOAuthenticator
> > > > > > > > > > > #c.LocalGitHubOAuthenticator.create_system_users = True
> > > > > > > > > > >
> > > > > > > > > > > import os
> > > > > > > > > > > c.JupyterHub.spawner_class = 'dockerspawner.SwarmSpawner'
> > > > > > > > > > > c.SwarmSpawner.network_name = 'jupyterhub_network'
> > > > > > > > > > > from jupyter_client.localinterfaces import public_ips
> > > > > > > > > > > c.JupyterHub.hub_ip = '0.0.0.0'
> > > > > > > > > > > c.JupyterHub.proxy_api_ip = '0.0.0.0'
> > > > > > > > > > > #c.SwarmSpawner.extra_placement_spec = { 'constraints' : 
> > > > > > > > > > > ['node.role==worker'] }
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > while I can see the service starting:
> > > > > > > > > > >
> > > > > > > > > > > root@jupyterhub:~# docker service ls
> > > > > > > > > > > ID                  NAME                MODE              
> > > > > > > > > > >   REPLICAS            IMAGE                       PORTS
> > > > > > > > > > > wtq7n8hvymwf        jupyter-zozo6015    replicated        
> > > > > > > > > > >   0/1                 jupyterhub/singleuser:0.9
> > > > > > > > > > >
> > > > > > > > > > > This is what I get in the logs:
> > > > > > > > > > >
> > > > > > > > > > > [W 2020-02-13 16:15:12.977 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:13.035 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:13.214 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:13.461 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:13.781 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:14.293 JupyterHub base:744] User 
> > > > > > > > > > > zozo6015 is slow to become responsive (timeout=10)
> > > > > > > > > > > [W 2020-02-13 16:15:15.134 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:18.796 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:21.634 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:26.651 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:31.664 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:36.683 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:41.701 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:44.048 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:45.070 JupyterHub utils:192] Failed 
> > > > > > > > > > > to connect to http://jupyter-zozo6015:8888/user/zozo6015/ 
> > > > > > > > > > > ([Errno -2] Name or service not known)
> > > > > > > > > > > [W 2020-02-13 16:15:45.071 JupyterHub user:510] 
> > > > > > > > > > > zozo6015's server never showed up at 
> > > > > > > > > > > http://jupyter-zozo6015:8888/user/zozo6015/ after 30 
> > > > > > > > > > > seconds. Giving up
> > > > > > > > > > > [E 2020-02-13 16:15:45.229 JupyterHub gen:974] Exception 
> > > > > > > > > > > in Future <Task finished 
> > > > > > > > > > > coro=<BaseHandler.spawn_single_user.<locals>.finish_user_spawn()
> > > > > > > > > > >  done, defined at 
> > > > > > > > > > > /srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py:629>
> > > > > > > > > > >  exception=TimeoutError("Server at 
> > > > > > > > > > > http://jupyter-zozo6015:8888/user/zozo6015/ didn't 
> > > > > > > > > > > respond in 30 seconds",)> after timeout
> > > > > > > > > > >     Traceback (most recent call last):
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/tornado/gen.py",
> > > > > > > > > > >  line 970, in error_callback
> > > > > > > > > > >         future.result()
> > > > > > > > > > >       File "/usr/lib/python3.5/asyncio/futures.py", line 
> > > > > > > > > > > 293, in result
> > > > > > > > > > >         raise self._exception
> > > > > > > > > > >       File "/usr/lib/python3.5/asyncio/tasks.py", line 
> > > > > > > > > > > 239, in _step
> > > > > > > > > > >         result = coro.send(None)
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/handlers/base.py",
> > > > > > > > > > >  line 636, in finish_user_spawn
> > > > > > > > > > >         await spawn_future
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/user.py",
> > > > > > > > > > >  line 528, in spawn
> > > > > > > > > > >         raise e
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/user.py",
> > > > > > > > > > >  line 502, in spawn
> > > > > > > > > > >         resp = await server.wait_up(http=True, 
> > > > > > > > > > > timeout=spawner.http_timeout)
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/utils.py",
> > > > > > > > > > >  line 197, in wait_for_http_server
> > > > > > > > > > >         timeout=timeout
> > > > > > > > > > >       File 
> > > > > > > > > > > "/srv/.jupyterhub/lib/python3.5/site-packages/jupyterhub/utils.py",
> > > > > > > > > > >  line 155, in exponential_backoff
> > > > > > > > > > >         raise TimeoutError(fail_message)
> > > > > > > > > > >     TimeoutError: Server at 
> > > > > > > > > > > http://jupyter-zozo6015:8888/user/zozo6015/ didn't 
> > > > > > > > > > > respond in 30 seconds
> > > > > > > > > > >
> > > > > > > > > > > 16:17:39.648 [ConfigProxy] info: 200 GET /api/routes
> > > > > > > > > > >
> > > > > > > > > > > Can I get any help to make this up and running?
> > > > > > > > > > >
> > > > > > > > > > > Regards,
> > > > > > > > > > > Peter
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