Jupyterhub behind Nginx reverse proxy can't access kernels

[Peter Sprague]

Jupyterhub works well when I access it directly on port 8000.  Once I attempt to bring a Nginx reverse proxy into the stream, site is accessed, notebooks open, but R or Python kernels are not connecting.

Here is my Nginx config:

    #jupyterhub.geovisionenvironmental.com
    server {
        listen 8279;
        server_name jupyterhub.geovisionenvironmental.com
                    jupyterhub.geovisionenvironmental.ca;

        location  /  {
                # pass to x.x.x.x jupyterhub iocage jail
                proxy_set_header HOST $host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-NginX-Proxy true;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                #proxy_bind x.x.x.x;
                proxy_pass http://x.x.x.x:8000;
        }

    }

Likely have more proxy_set_header commands than needed.

Any ideas or suggestions?

Peter

[Ryan Lovett]

We have something similar, based on the compmodels repo, which additionally proxies web sockets. E.g.

location ~* /(user/[^/]*)/(api/kernels/[^/]+/channels|terminals/websocket)/? {

    proxy_pass http://{{ jupyterhub_host }}:8000;

    proxy_set_header X-Real-IP $remote_addr;

    proxy_set_header Host $host;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_set_header X-NginX-Proxy true;

    # WebSocket support

    proxy_http_version 1.1;

    proxy_set_header Upgrade $http_upgrade;

    proxy_set_header Connection "upgrade";

    proxy_read_timeout 86400;

[Luke Segars]

Peter, did you ever find a solution to this? I'm encountering the same problem with a very similar nginx configuration and haven't been able to get variants of Ryan's configuration working yet.

[Andrea Zonca]

hi,

I also adapted the configuration from compmodels and works fine, see:

https://gist.github.com/zonca/08c413a37401bdc9d2a7f65a7af44462

cheers,

Andrea

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