Getting 500 : Internal Server Error

JupyterHub Zero to JupyterHub on Kubernetes
1

I deployed jupyter on k8s. All running fine. Not seeing any error on any pod logs.

But when I try to login through browser it throughs 500 internal server error.

only error I see on the hub log is below ------

File “/usr/local/lib/python3.6/dist-packages/traitlets/traitlets.py”, line 2054, in validate
self.error(obj, value)
File “/usr/local/lib/python3.6/dist-packages/traitlets/traitlets.py”, line 625, in error
raise TraitError(e)
traitlets.traitlets.TraitError: The ‘pvc_name_template’ trait of a KubeSpawner instance must be a unicode string, but a value of None <class ‘NoneType’> was specified.

please help.

2

Hi! Welcome to the forum

Please could you tell us:

  • Your Z2JH version
  • How you setup your K8S cluster
  • How you deployed Z2JH
  • Your Z2JH config with secrets redacted

If you haven’t already read this you might find it useful when posting in future:

Thanks!

3

Hello Manics,

Thank you for your quick response. Below are the details …

jupyter --version

jupyter core : 4.6.3
jupyter-notebook : 6.0.3
qtconsole : 4.7.3
ipython : 7.18.1
ipykernel : 5.3.4
jupyter client : 6.1.7
jupyter lab : 2.1.2
nbconvert : 6.0.7
ipywidgets : 7.5.1
nbformat : 5.0.8
traitlets : 4.3.3

===========
Its a multimaster / multinode k8s cluster ( v1.19.0 ) on Ubuntu 20.04.1 LTS.

through helm chart

helm repo add jupyterhub See installation instructions for: | JupyterHub’s Helm chart repository
helm repo update
helm upgrade --install $RELEASE jupyterhub/jupyterhub --namespace $NAMESPACE --version=0.8.2 --values <xyz.yaml>

below is the yaml -----------------

proxy:
secretToken: xxx
service:
type: NodePort
nodePorts:
http: 30018
chp:
resources:
requests:
memory: 0
cpu: 0

services:
test:
admin: true
apiToken: xxxxxxx
extraConfig:
jupyterlab: |
c.Spawner.debug = True
c.Spawner.default_url = ‘/lab’
myConfig.py: |
c.JupyterHub.db_url = ‘xxxxx’
from oauthenticator.gitlab import LocalGitLabOAuthenticator
c.JupyterHub.authenticator_class = LocalGitLabOAuthenticator
c.LocalGitLabOAuthenticator.oauth_callback_url = 'xxxx
c.LocalGitLabOAuthenticator.client_id = xxxxx
c.LocalGitLabOAuthenticator.client_secret = xxxxx
c.LocalGitLabOAuthenticator.auto_login = True
c.LocalAuthenticator.create_system_users = True
c.LocalAuthenticator.add_user_cmd = [‘adduser’, ‘-q’, ‘–gecos’, ‘""’, ‘–disabled-password’, ‘–force-badname’]
c.JupyterHub.admin_access = True
c.Authenticator.admin_users = {xxxx}

singleuser:
image:
name: xxxxx
tag: xxxxxx
imagePullSecrets:

  • name: xxxxxxxxx
    extraEnv:
    SPARKMAGIC_CONF_DIR: “/etc/.sparkmagic”
    SPARKMAGIC_CONF_FILE: “config.json”

    HIVE_KERNEL_CONF_FILE: “/etc/hiveql/hiveql_kernel.json”

    GRANT_SUDO: “yes”

    uid: 0

    cmd: null

storage:
capacity: 2Gi
dynamic:
storageClass: xxxxxxxx

type: none

memory:

limit: 3G

guarantee: 2G

defaultUrl: “/lab”

4

Hi! You’re using a very old version of Z2JH. Please could you try the latest release?

If you still have problems could you:

  • reformat your configuration as a markdown code block so it’s easier to read?
  • Turn on debug logs and show us the hub logs
  • Try simplifying your configuration, e.g. get rid of extraConfig