JupyterHub in Docker and Nginx on host: Websocket problem

JupyterHub
1

I’m using the official Nginx proxy settings, including websocket configuration as presented in the official documentation: https://jupyterhub.readthedocs.io/en/stable/reference/config-proxy.html#nginx Server starts, and the Jupyter main page loads, however, I keep getting Websocket errors in the Chrome developer console:

WebSocket connection to 'ws://localhost/api/events/subscribe?token=8acfafc93ec11a9acfeeb21f680d8008a4a0def370750ace' failed:

It looks like the offiicial Nginx config no longer works with the official Jupyter containers. Could someone confirm, please? If it worked for you, what was your container hash?

2

If this is with JupyterHub, I suspect you might be hitting this issue using the legacy notebook server, which doesn’t provide this endpoint. Check the single-user server logs to see if it says it’s starting “Jupyter Server” or “Notebook” and the version.

You can specifically launch jupyter-server with JUPYTERHUB_SINGLEUSER_APP=jupyter-server in the spawner environment.