De technische inhoud hieronder is hetzelfde als de Engelse README in de Git-repository.

Ansible Role: `bsmeding.openwebui_docker`

GitHub: ansible_role_openwebui_docker
Ansible Galaxy: bsmeding.openwebui_docker

The following documentation is taken from the repository README.

Deploys Open WebUI (web interface for Ollama) via Docker. Requires bsmeding.docker role run first.

Source repository: github.com/bsmeding/ansbile_role_openwebui_docker.

See the Open WebUI documentation for full reference.

Requirements

Ollama installed and running (e.g. via bsmeding.ollama role)
Docker (via bsmeding.docker role)
community.docker and community.general collections

Role Variables

Variable	Default	Description
`openwebui__name`	`open-webui`	Container name.
`openwebui__image`	`ghcr.io/open-webui/open-webui:main`	Docker image.
`openwebui__home`	`/opt/{{ openwebui__name }}`	Persistent data directory.
`openwebui__port`	`8080`	WebUI listen port.
`openwebui__ollama_port`	`11434`	Ollama API port (same host).
`openwebui__ollama_base_url`	`http://host.docker.internal:{{ openwebui__ollama_port }}`	Ollama backend URL. Override when Ollama is on another host.
`openwebui__enable_persistent_config`	`true`	When `false`, env vars override DB on every restart. Use to fix "backend required" if DB has wrong config.
`openwebui__auth`	`false`	Require login. Set `true` for multi-user.
`openwebui__webui_url`	`""`	Access URL for external access (e.g. `http://192.168.210.38:8080`).
`openwebui__cors_allow_origin`	`""`	Semicolon-separated CORS origins. Auto-set from webui_url when set.
`openwebui__firewall_allow`	`false`	Allow port in ufw when true.
`openwebui__env`	`{}`	Additional env vars (merged last, overrides defaults).
`openwebui__remove_existing_container`	`false`	Remove container before create.
`openwebui__remove_existing_home_dir`	`false`	DANGER Remove data dir (for tests only).
`openwebui__gpu`	`false`	When `true`: use `:cuda` image and `--gpus all`.
`openwebui__gpu_image`	`ghcr.io/open-webui/open-webui:cuda`	Image used when `openwebui__gpu` is true.

Health Check

The Open WebUI Docker image includes a built-in HEALTHCHECK. When the container is healthy, docker ps shows (healthy). No extra configuration needed.

GPU Support

For NVIDIA GPU support (e.g. embedding models, hybrid search), set openwebui__gpu: true. This will:

Use the :cuda image instead of :main
Pass --gpus all to the container

Requirements:

NVIDIA Container Toolkit installed on the host
Docker Engine on Linux (Docker Desktop on Linux/macOS does not support GPUs)

Example:

openwebui__gpu: true

For custom GPU configuration, override openwebui__device_requests. See community.docker.docker_container.

Adding Backends (Ollama, OpenAI-compatible)

Ollama (local, same host)

Ollama on the same host is configured by default via OLLAMA_BASE_URL → http://host.docker.internal:11434. No extra configuration needed if Ollama runs on port 11434.

If you see "Open WebUI Backend required" or "Serve the WebUI from the backend":

Clear browser cache – This fixes the error in most cases. Hard refresh (Ctrl+Shift+R / Cmd+Shift+R) or clear cache for the site. The frontend may be cached from a previous broken state.
Reset persisted config – Set openwebui__enable_persistent_config: false, then re-run the playbook. Env vars will be read on every start.

Or clear data and recreate (deletes all data):

openwebui__remove_existing_container: true
openwebui__remove_existing_home_dir: true

Or configure in Admin UI – Open WebUI → Admin → Connections → add Ollama with URL http://host.docker.internal:11434 (or your Ollama URL).

Ollama on another host

openwebui__ollama_base_url: "http://192.168.1.50:11434"

OpenAI-compatible API (OpenAI, vLLM, etc.)

Add via openwebui__env:

openwebui__env:
  OPENAI_API_BASE: "https://api.openai.com/v1"
  # OPENAI_API_KEY: "sk-..."  # if required

Or configure in Admin → Connections after first login.

Common `openwebui__env` options

Env var	Description
`OLLAMA_BASE_URL`	Ollama backend URL (also set via `openwebui__ollama_base_url`).
`OPENAI_API_BASE`	OpenAI-compatible API base URL.
`OPENAI_API_KEY`	API key for OpenAI/compatible services.
`ENABLE_PERSISTENT_CONFIG`	`false` to always use env vars.
`WEBUI_URL`	Set via `openwebui__webui_url`.
`HF_TOKEN`	Hugging Face token (higher rate limits).

See Open WebUI env configuration for the full list.

Example Playbook

- hosts: ollama_servers
  roles:
    - bsmeding.ollama
    - bsmeding.docker
    - bsmeding.openwebui_docker

Example host_vars (Ollama + Open WebUI, external access)

# Ollama
ollama__port: 11434
ollama__host: 0.0.0.0

# Open WebUI
openwebui__ollama_port: "11434"
openwebui__webui_url: "http://192.168.210.38:8080"
openwebui__firewall_allow: true
# Fix "backend required" when DB has old config:
# openwebui__enable_persistent_config: false

Troubleshooting

`no such column: user.profile_banner_image_url` (or similar)

The SQLite database schema is outdated (created by an older Open WebUI). Reset the data to run migrations on a fresh DB:

# In host_vars - ONE-TIME reset (deletes all users, chats, settings)
openwebui__remove_existing_container: true
openwebui__remove_existing_home_dir: true

Run the playbook once, then set both back to false. Or manually on the host:

docker stop open-webui && docker rm open-webui
rm -rf /opt/open-webui/*

Then re-run the playbook (without remove_existing, so it creates a fresh container).

`GET /api/config HTTP/1.1" 500`

Usually caused by the database schema mismatch above. Same fix: reset data directory.

License

MIT

Ansible Role: bsmeding.openwebui_docker