Extensions fail to load when using reverse proxy with subpath.

[davidliyutong]

Hello everyone,

I am deploying a code-server instance with Nginx as a reverse proxy. The two are bundled in one docker container. The plan is to serve code-server under /coder/ subpath, and other services under their unique paths. The editor works fine. I can access the interactive terminal, open every panel, and install extensions from the marketplace. It is just that the extensions are not working.

Here are the details: The code-server and nginx reside in the same container. The code-server is launched with code-server --bind-addr 0.0.0.0:3000 --auth none --cert false and listens at port 3000. The nginx daemon listens at port 80. Its configuration
looks like:

location ~ ^/coder/(.*)$ {
        proxy_pass http://127.0.0.1:3000/$1;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_read_timeout 300;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
        add_header Strict-Transport-Security "max-age=15552000; includeSubDomains" always;
        client_max_body_size 0;
    }

The docker container is launched with docker run --rm -p 3000:3000 -p 8000:80 coderwithnginx:latest, exposing both port 3000 and port 80. When accessing via http://127.0.0.1:3000, the extensions work. However when accessing via http://127.0.0.1:8000/coder/, only the editor and terminal work. It looks like the extensions are installed but not activated, and I am getting error messages in the dev console.

Screenshot for the working scenario

> Screenshot for the failed scenario

What could be the possible causes?

[code-asher]

Do the query parameters get included in the location match? Wonder if you need proxy_pass http://127.0.0.1:3000/$1$is_args$args;.

Or this should also work, I think:

location /coder/ {
  proxy_pass http://127.0.0.1:3000/;
}

[davidliyutong]

Do the query parameters get included in the location match? Wonder if you need proxy_pass http://127.0.0.1:3000/$1$is_args$args;.

This solution works! Thank you very much!