Fail to set up formgrade with jupyterhub

[Xin Huang]

Hi,

I am trying to set up jupyterhub with nbgrader these days. My jupyterhub version is 0.6.1 and nbgrader version is 0.3.0.dev0

Everything works fine except formgrade.

I start jupyterhub by root, and use nbgrader by another account called instructor.
Then I go to my course directory /home/instructor/nbgrader/courses/demo and run commands according to http://nbgrader.readthedocs.io/en/stable/configuration/jupyterhub_config.html

export CONFIGPROXY_AUTH_TOKEN='mytoken'
export JPY_API_TOKEN=$(jupyterhub token --db=sqlite:////srv/jupyterhub/jupyterhub.sqlite -f /srv/jupyterhub/jupyterhub_config.py instructor)

nbgrader formgrade

It raises exceptions as follows:

[FormgradeApp | INFO] Proxying /hub/nbgrader/demo --> http://127.0.0.1:9000                                                        
Traceback (most recent call last):                                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py", line 137, in _new_conn                
    (self.host, self.port), self.timeout, **extra_kw)                                                                              
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/util/connection.py", line 91, in create_connection    
    raise err                                                                                                                      
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/util/connection.py", line 81, in create_connection    
    sock.connect(sa)                                                                                                               
ConnectionRefusedError: [Errno 111] Connection refused                                                                             
                                                                                                                                   
During handling of the above exception, another exception occurred:                                                                
                                                                                                                                   
Traceback (most recent call last):                                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 559, in urlopen              
    body=body, headers=headers)                                                                                                    
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 353, in _make_request        
    conn.request(method, url, **httplib_request_kw)                                                                                
  File "/opt/anaconda3/lib/python3.5/http/client.py", line 1083, in request                                                        
    self._send_request(method, url, body, headers)                                                                                 
  File "/opt/anaconda3/lib/python3.5/http/client.py", line 1128, in _send_request                                                  
    self.endheaders(body)                                                                                                          
  File "/opt/anaconda3/lib/python3.5/http/client.py", line 1079, in endheaders                                                     
    self._send_output(message_body)                                                                                                
  File "/opt/anaconda3/lib/python3.5/http/client.py", line 911, in _send_output                                                    
    self.send(msg)                                                                                                                 
  File "/opt/anaconda3/lib/python3.5/http/client.py", line 854, in send                                                            
    self.connect()                                                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py", line 162, in connect                  
    conn = self._new_conn()                                                                                                        
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py", line 146, in _new_conn                
    self, "Failed to establish a new connection: %s" % e)                                                                          
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.HTTPConnection object at 0x7ff3512b9
b38>: Failed to establish a new connection: [Errno 111] Connection refused                                                         
                                                                                                                                   
During handling of the above exception, another exception occurred:                                                                
                                                                                                                                   
Traceback (most recent call last):                                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/adapters.py", line 376, in send                                        
    timeout=timeout                                                                                                                
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 609, in urlopen              
    _stacktrace=sys.exc_info()[2])                                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/util/retry.py", line 273, in increment                
    raise MaxRetryError(_pool, url, error or ResponseError(cause))                                                                 
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='127.0.0.1', port=8001): Max retries exceeded with url:
 /api/routes/hub/nbgrader/demo (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7ff3
512b9b38>: Failed to establish a new connection: [Errno 111] Connection refused',))                                               
                                                                                                                                   
During handling of the above exception, another exception occurred:                                                                
                                                                                                                                   
Traceback (most recent call last):                                                                                                 
  File "/opt/anaconda3/bin/nbgrader", line 9, in <module>                                                                          
    load_entry_point('nbgrader==0.3.0', 'console_scripts', 'nbgrader')()                                                           
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/apps/nbgraderapp.py", line 249, in main                                
    NbGraderApp.launch_instance()                                                                                                  
  File "/opt/anaconda3/lib/python3.5/site-packages/jupyter_core/application.py", line 267, in launch_instance                      
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)                                                             
  File "/opt/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py", line 596, in launch_instance                  
    app.start()                                                                                                                    
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/apps/nbgraderapp.py", line 242, in start                               
    super(NbGraderApp, self).start()                                                                                               
  File "/opt/anaconda3/lib/python3.5/site-packages/jupyter_core/application.py", line 256, in start                                
    self.subapp.start()                                                                                                            
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/apps/formgradeapp.py", line 191, in start                              
    self.init_tornado_settings()                                                                                                   
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/apps/formgradeapp.py", line 150, in init_tornado_settings              
    parent=self)                                                                                                                   
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/auth/hubauth.py", line 94, in __init__                                 
    'target': target                                                                                                               
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/auth/hubauth.py", line 247, in _proxy_request                          
    return self._request('proxy', *args, **kwargs)                                                                                 
  File "/opt/anaconda3/lib/python3.5/site-packages/nbgrader/auth/hubauth.py", line 259, in _request                                
    }, data=data)                                                                                                                  
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/api.py", line 53, in request                                           
    return session.request(method=method, url=url, **kwargs)                                                                       
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/sessions.py", line 468, in request                                     
    resp = self.send(prep, **send_kwargs)                                                                                          
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/sessions.py", line 576, in send                                        
    r = adapter.send(request, **kwargs)                                                                                            
  File "/opt/anaconda3/lib/python3.5/site-packages/requests/adapters.py", line 437, in send                                        
    raise ConnectionError(e, request=request)                                                                                      
requests.exceptions.ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=8001): Max retries exceeded with url: /api/routes/hu
b/nbgrader/demo (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7ff3512b9b38>: Fail
ed to establish a new connection: [Errno 111] Connection refused',))

I can't figure out what is wrong, could you give me a help? Thanks!

My jupyterhub_config.py:

c = get_config()

c.Authenticator.whitelist = {'instructor', 'student'}
c.Authenticator.admin_users = {'instructor'}

c.JupyterHub.port = 443

c.JupyterHub.ssl_cert = 'mycert'
c.JupyterHub.ssl_key = 'mykey'

c.JupyterHub.proxy_auth_token = 'mytoken'

My nbgrader_config.py:

c = get_config()

c.TransferApp.exchange_directory = "/srv/nbgrader/exchange"

c.NbGrader.course_id = "demo"
c.NbGrader.db_assignments = [
    dict(name="ps1")
]
c.NbGrader.db_students = [
    dict(id="student", first_name="Ming", last_name="Xiao"),
]

c.FormgradeApp.ip = "127.0.0.1"
c.FormgradeApp.port = 9000
c.FormgradeApp.authenticator_class = "nbgrader.auth.hubauth.HubAuth"

import os

c.HubAuth.graders = ["instructor"]
c.HubAuth.hub_address = "127.0.0.1"
c.HubAuth.hubapi_token = os.environ['JPY_API_TOKEN']

[Jessica B. Hamrick]

Hi Xin,

I'm not entirely sure what the issue is, but it looks like you're running JupyterHub with https, which requires a bit more configuration for formgrader. Try putting the following in your nbgrader config:

c.HubAuth.hub_base_url = "https://localhost:443"

A working example of the formgrader and JupyterHub with SSL can be found in the nbgrader tests here: https://github.com/jupyter/nbgrader/blob/master/nbgrader/tests/formgrader/manager.py#L258

This is something that should definitely be documented better, so I'll open an issue for that. Let me know if this helps!

Also, you may want to upgrade to the newly released version of nbgrader, 0.3.0, rather than using the older development version that you have.

Cheers,

Jess

--
You received this message because you are subscribed to the Google Groups "Project Jupyter" group.
To unsubscribe from this group and stop receiving emails from it, send an email to jupyter+u...@googlegroups.com.
To post to this group, send email to jup...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/698544a8-2655-4ba1-a69a-c578ac648a21%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Xin Huang]

Hi Jess, thanks for reply.

After looking up https://github.com/jupyter/nbgrader/blob/master/nbgrader/tests/formgrader/manager.py#L258

I add

c.HubAuth.hub_base_url = "https://localhost:443"

c.HubAuth.hub_port = 443
c.HubAuth.hubapi_port = 8081
c.HubAuth.proxy_port = 444

into my nbgrader_config.py

and run

export CONFIGPROXY_AUTH_TOKEN='mytoken'
export JPY_API_TOKEN=$(jupyterhub token --db=sqlite:////srv/jupyterhub/jupyterhub.sqlite -f /srv/jupyterhub/jupyterhub_config.py instructor)

nbgrader formgrade

It works fine now. Thank you very much.

[Holger Karl]

Hi,

oh, yes, please - document this! This discussion saved me after two afternoons of trying to get formgrader to work :-))

Thanks

Holger