doc: rootless mode docker installation

[bwiercinski]

Is your feature request related to a problem? Please describe.
I've tried to install webui on a docker running in rootless mode. Unfortunately, the instructions don't work for rootless. The --add-host=host.docker.internal:host-gateway does not work on rootless by design stack overflow. Also --network=host doesn't work docker docs. What I had to do is:

• Bind host.docker.internal to my local interface (e.g. wifi interface) using:

docker run -d -p 3000:8080 --add-host "host.docker.internal:$(nslookup "$HOST.home" | awk '/^Address: /{ print $2 }')" -v ollama-webui:/app/backend/data --name ollama-webui --restart always ghcr.io/ollama-webui/ollama-webui:main

(alternatively replace in $(...) to ip addr show wifi-interface | grep -oP 'inet \K[0-9.]+')

• Host the ollama server at 0.0.0.0 instead of 127.0.0.1. Instructions here: ollama docs

Describe the solution you'd like
Improve documentation for other affected people.

Describe alternatives you've considered
use socat
https://stackoverflow.com/a/74979409/11226692

[tjbck]

Hi, Thanks for the suggestion! Feel free edit our troubleshooting.md doc and make a PR!

[jonasbg]

How does this work with podman. Another rootless provider?

[GZGavinZhao]

Podman works the same, except the --add-host becomes --add-host=host.containers.internal:host-gateway. For example, my command for running Ollama is:

podman run -d -p 3000:8080 --add-host=host.containers.internal:host-gateway -v <ollama-webui-datadir>:/app/backend/data --name open-webui --restart always ghcr.io/open-webui/open-webui:main

Note that as mentioned by the OP, with this method the Ollama server must be hosted at 0.0.0.0 instead of the default 127.0.0.1.

I've been using a Podman rootless configuration for some time. I've submitted pull request open-webui/open-webui#877 to update the README with details. This configuration doesn't require Ollama to listen anywhere but localhost. 🥂