Unable to open Notebook via Web Services

Determined-AI version: 0.12.11 Installation method: det-deploy local cluster-up

After installing and configuring users through the determined CLI, I am unable to access to a “just-created” notebook. The system correctly pulls determined/environments image and from the logs, it is clear that the notebook is created.

[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.703 LabApp] Writing notebook server cookie secret to /run/determined/jupyter/runtime/notebook_cookie_secret
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [W 07:50:04.929 LabApp] All authentication is disabled.  Anyone who can connect to this server will be able to run code.
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.934 LabApp] JupyterLab extension loaded from /opt/conda/lib/python3.6/site-packages/jupyterlab
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.934 LabApp] JupyterLab application directory is /opt/conda/share/jupyter/lab
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.936 LabApp] Serving notebooks from local directory: /run/determined/workdir
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.936 LabApp] The Jupyter Notebook is running at:
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.936 LabApp] http://23b3f02a6e33:8888/proxy/c91200a8-bae3-4c61-b3e9-07af6d2fc51e/
[2020-07-20T07:50:04Z] 24b5f33d [RUNNING] ||  [I 07:50:04.936 LabApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

The problem is that when I try to open the notebook from the browser it stays in a charging phase for minutes and then returns a broken web page with error 502

I think that it might be a proxy problem. What is possible to do to fix this problem?

[PieroMacaluso]

Thanks @rb-determined-ai for your illuminating comment! It finally worked out!

I just post there the additional steps to solve this problem:

1. Localize the id of the network used by the cluster using docker network ls and take out the <ID>.
2. Run ifconfig on the cluster machine and verify that there is an interface called br-<ID>
3. Run iptables -A INPUT -i br-<ID> -j ACCEPT

Let me know if I can contribute with you to put this information in the FAQ Docs or directly in the installation docs.

Thanks for your precious help.

[PieroMacaluso]

I will soon contribute to the FAQ Docs! Thanks for your time and help! 👍