Open Starting Page in Jupyter session per default

[tkilias]

When a Jupyter Lab session is started in the web browser, we want that the user directly sees the starting page.

There are few ways how this should work:

• workspaces
  • I didn't get this reliable to work
• jupyter-lab
  • seems to work only for the first login
• File navigation with tree URL
  • this seems to work reliable, in that case we need to adjust the URL we show the user to connect to

Acceptance criteria

The URL currently is http://<host>:<forwarded port>/lab/tree/start.ipynb

• runtime/ansible/roles/jupyter/tasks/jupyterlab.yml is updated to set the URL as default URL in Juypter lab config see https://jupyterlab-server.readthedocs.io/en/latest/api/app-config.html

c.LabApp.default_url = '/lab/tree/start.ipynb'

• motd is updated to show connection URL for AMI and VM Editions
• User guide is updated to not use --detach to ensure the boot message is displayed directly without needing to use docker logs
• The following documents and scripts display the correct URL
  • entrypoint (derived from ansible)
  • User Guide
  • Docker Usage as this might be a little bit more specific

[ckunki]

Ir order to show the URL to users I see multiple places affected:

• The message when starting the docker container from command line
  • Additionally we could change the start command to not use --detach to ensure the message is displayed immediately and does not require to use docker logs
• User Guide
• Docker Usage as this might be a little bit more specific?

[ckunki]

Please add the URL to the current ticket.

[ckunki]

Proposal: http://<host>:<forwarded port>/lab/tree/start.ipynb

[tkilias]

@ckunki I think, we also need to change the motd for the VMs

[tkilias]

@ckunki and we should set the defaul_url in the jupyterlab config https://jupyterlab-server.readthedocs.io/en/latest/api/app-config.html