Detecting JupyterLab Tab Closure Using Traefik v3

Traefik Traefik v3 (latest)
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1

Hi!

I’m currently working on a project where I want to detect when a user closes their JupyterLab tab. My thought is to detect the closure of the WebSocket through Traefik v3, and then use that detection to call a stop service function in my Django application.

Here’s a bit more context:

  • There can be multiple JupyterLab servers per user.
  • Each JupyterLab server runs on a Docker Swarm worker node inside a Docker container.
  • These containers are created by a service on a Docker Swarm master.
  • The service itself is created from my Django application using the aiodocker library.

I would greatly appreciate any guidance on how to achieve this as I am new to Traefik, especially with regard to monitoring the WebSocket status through Traefik v3.

Thanks in advance for your help!

2

You could try to monitor the Traefik access log in JSON format. But I am not sure how you create the 1-to-1 connection between client and container. Usually Traefik load-balances requests between multiple target service containers.

3

Hi!

Thank you for your reply and suggestion.

I already have a 1-to-1 connection between client and container. I was not asking for it.

I will rely on log monitoring until I find a way for Traefik to directly call a Django function through a URL on detection of the closure of a WebSocket connection.

Unless someone has a better idea?